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Temperature-responsive resistance transition behaviors of the melamine sponges wrapped with different graphene oxide derivatives (i.e. nanoribbon, wide-ribbon and sheet) were investigated. Melamine sponge composites coated by three types of GO derivatives were prepared by a simple dip-coating approach. All these composites show good mechanical flexibility and reliability (almost unchanged compressive stress at 70 % strain after 100 cycles), high hydrophobicity (water contact angle >120°), excellent flame resistance (self-extinguishing) and structural stability even after burning, which was used to construct the resistance-based fire alarm/warning sensor. Notably, the different resistance response behaviors of such sensors are strongly dependent on the GO size and network formed on the MF skeleton surface. Typically, at a fixed high temperature of ∼350 ℃, the three fire alarm sensors show different response time (to trigger the alarm light) of 6.3, 8.4 and 11.1 s for nanoribbon, wide-ribbon and sheet at the same concentration, respectively. The structural observation and chemical analysis demonstrated that the discrepancy of temperature-responsive resistance transition behaviors of various GO derivatives was strongly determined by their different thermal reduction degrees during the high-temperature or flame treating process. This work offers a design and development for construction of smart fire alarm device for potential fire prevention and safety applications.

A fire alarm system (FAS) is a system comprising signalling-alarm devices, which automatically detect and transmit information about fire, but also receivers of fire alarms and receivers for damage signals. Fire alarm systems function in different environmental conditions. During operation they should be in state of fitness. This is determined by the reliability of the assembled units and rational management of the operation process. Therefore a reliability and operational analysis of fire alarm systems as a whole is essential. This article presents an authorial model and an operational and reliability analysis of FAS, which is exploited in a transport building. It also demonstrates relationships occurring in the analysed system, where to an addressable fire alarm central unit with detection loops and control-monitoring loops alarm device lines (with monitored relay outputs for actuation of alarm-signalling devices) were connected. Research and analysis of results for representative FAS, which were exploited in similar environmental conditions, were conducted in order to determine operational and reliability parameters of the investigated system. FAS computer simulation was run during the time t = 1 year of safety system operation. This led to the calculation of the probability value of the analysed FAS staying in the examined operational states.

The verdict has been established that Railway Level Crossings (RLCs) present possible risk to roads users. Because of the ever-increasing number of vehicles on the road every day, it was determined that employing automation at level crossings can be beneficial to both road and railway users' safety. The aim is to develop an automated railway level crossing system that would reduce the likelihood of collisions between trains and road users at intersections. From the perspective of a railway level crossing, the conditions safeguards must meet is straightforward - Before a train passes, there must be a complete stop for all road users. Two RFID sensors and Ultrasonic sensors are used located at strike-in and strike-out points at the level crossing. Detection of automobiles stuck on the railroad once the train has activated the automation at the RLC is performed by the Ultrasonic sensor. Other warning measures in the system include an automated barrier, Light Emitting Diode flashing lights, and an audio alarm device. Arduino UNO and ESP32 were used as microcontrollers to perform all the logical operations and control commands. Consequently, the next train station from RLC was updated of the incoming train’s Expected Time of Arrival (ETA). The time it takes for the barriers to close will be determined by the train’s speed. In this project work, the prospective application strategy for securing railroad crossings is described in detail. It is the best feasible control of the level crossing by using the train detection system.

Purpose The purpose of this study was to compare the effectiveness of bell-and-pad alarm therapy to body-worn alarm therapy for the management of monosymptomatic enuresis in children 6 to 16 years of age. Design A prospective, randomized, adaptive clinical control trial. Subjects and setting The sample comprised 86 children who attended a continence clinic for treatment of monosymptomatic enuresis and met the criteria for enuresis alarm therapy as per International Children's Continence Society (ICCS) guidelines. Subjects were randomly allocated to an experimental group (body-worn alarm, n = 41) or a control group (bell-and-pad alarm, n = 45). The study setting was a single-site specialist continence service in regional Victoria, Australia. Treatment was administered in the child's home. Methods Alarm therapy was administered by the child and/or parent for an initial period of 8 weeks at which time the child underwent a review with the continence nurse specialist. If the child had achieved 14 consecutive dry nights, the therapy was deemed successful and ceased. Children who had not become dry continued therapy for a further 8 weeks up to a maximum of 16 weeks, with a final review was instituted. Each child kept a diary for the duration of alarm therapy to report on frequency of wet/dry nights, times of alarm, response to alarm, and response to sensation to void (without alarm). The 2 types of alarm devices were compared with respect to categorical variables using dichotomous cross-tabulations and χ tests of independence based on the most positive outcome versus the other outcomes. Results Dryness in accordance with the criteria outlined by the ICCS guidelines was achieved in 18 children (43.9%) in the body-worn alarm group versus 29 children (64.4%) in the routine (bell-and-pad) group (P = .056). The bell-and-pad alarm performed better on 7 out of the 9 indicators, including the primary outcome measure of the child attained dryness for 14 nights or more, nightly alarm use, alarm woke child, alarm woke parent (P = .022), false (positive) alarms (P = .039), child turned alarm off and went back to sleep (P = .003), and child was compliant with alarm use. The body-worn device produced higher proportions of the most positive outcomes for 2 of the 9 indicators: relapse (P = .076) and false (negative) nonalarms (P = .066). Conclusions Study findings suggests that the bell-and-pad alarm is preferable to the body-worn alarm. Additional research is recommended using other body-worn alarm devices across a larger population in order to establish the more definitive findings needed for clinical decision-making.

As there is no technology to detect the frame number area hidden weld rapidly and accurately, the frame integrality detection algorithm was studied in this paper. First of all, to achieve the conversion of longitudinal wave to transvers wave, the waveform transformation technology was applied to multiple thin and high impedance materials. The acoustic wedge was designed by using Plexiglas through 30 degree incident angle. Ultrasonic receiving and launch, signal acquisition and processing, display and alarm device were integrated using upper and lower structure based on the SOPC system of Niso II. This method showed that the instrument can accomplish the integrity of the frame detection rapidly, efficiently and accurately.

Computer combined with mathematical methods to monitor industrial parameters has achieved good results. Temperature is one of the important parameters in industrial, military, agricultural, medical and other fields. In some particular environments, direct wiring measurements are clearly not sufficient, so wireless transmission of temperature sensing systems is particularly important. The system is divided into two parts: sending and receiving. The wireless data communication transceiver module is used to realize wireless data transmission. The sending part is based on the single-chip microcomputer. The temperature sensor is used for real-time temperature collection and wireless transmission. The collected results are verified by mathematical processing algorithm. The receiving module displays the temperature of the collection area on the LCD, and sends it to the PC through the temperature alarm device through the serial port, so as to realize the controllable temperature adjustment within a certain threshold. Compared with the traditional temperature detection system, the combination of computer and mathematical algorithm and the design of wireless transmission equipment make the system have the advantages of good real-time, high reliability, low engineering cost and low power consumption.

With the economic development and the improvement of living standards, the aging problem has become more and more serious, and the health and safety of the elderly have also attracted much attention. In order to detect and rescue the elderly when they fall and monitor the vital signs of the elderly in real time, this paper designs an elderly health monitoring and fall prevention positioning alarm device. The device is based on STM32 single chip microcomputer system and adopts modular design. It is equipped with SIM800 C mobile communication module and GPS positioning module. When the old man falls unexpectedly and does not stand up in a certain period of time, the device automatically calls the bound guardian’s cell phone and sends SMS to display the location and state of the old man. Sensors such as body temperature, heart rate and step number are integrated to detect the health data of the elderly in real time, and alarm quickly when the data are abnormal. At the same time, cloud monitoring app is developed based on E4A platform to monitor the physical state of the elderly in real time. The experimental results show that the device can correctly identify most fall states, and the false alarm rate and missed alarm rate are low. It can effectively distinguish fall and daily life behavior. The test accuracy reaches 92 %, and has high stability and reliability.

For electric parameters measurement and facilitation, through the study of control and theory of power parameter measurement, design a kind of take alarm device can measure the voltage and current at the same time power three electricity parameters of simple measuring instrument, the measurement system uses single-chip microcomputer as the main control unit, using ADC0832 as voltage acquisition chip, through multiple harmonic oscillation circuit resistance is converted into frequency, again by resistance transformation to calculate the current, finally calculated by single chip microcomputer power displayed on the LCD screen. Alarm circuit by relay all the way and the light-emitting diode (led), as well as of the horn, when an ADC chip, the detection of voltage, current, or power more than setting the maximum threshold, can make the I/O mouth into a low level, Triode and relay conduct, led and horn line pressure drop resulting alarm, through simulation and experiment validate the correctness and feasibility of the design.

An intelligent infusion alarm device developed based on weight sensing is rising in response to the deficiencies and hazards of the current infusion device. This paper introduces the development of this alarm device in four aspects, including hardware design, software design, fixed end interface design and smartphone app interface design. This intelligent infusion alarm device is able to monitor the weight changes of infusion bottle constantly through a weight sensor and related mechanism, enabling real-time check on the circumstances of infusion. Thus, it assures patients safety in infusion while allowing their family members be off for medicine, medical report, etc. at the time the patients don't need to be taken care.

The alarm device is very important in a vehicle, especially on four-wheeled vehicles. Alarm device installed to avoid in case of danger of theft or destruction of the car. So designed car alarm system that can send short message to car owner who use AT89S52 microcontroller. The hardware arrangement of the car alarm system uses the SMS-based AT89S52 microcontroller in this design, consisting of four main parts of the circuit, the minimum system circuit of microcontroller, power supply, serial communication, Input / Output. In SMS text sent from Wavecom M1306B modem and received by mobile (mobile phone) to SMS center or SMS Center flows in form of PDU (Protocol Data Unit). In the sms format is divided into several segments of data that each segment has a specific purpose. The segments are: SMS center number, destination number, bytes for the purpose of setting this SMS and most important is the SMS content that has been changed in the form of a PDU. To be able to send or upload SMS data to the modem and ordered the modem to send SMS data it required AT Command instructions.

In April 2016, the U.S. Mine Safety and Health Administration (MSHA) began requiring the use of continuous personal dust monitors to monitor and measure respirable mine dust exposures to underground coal miners. Mines are currently using the PDM3700 personal dust monitor to comply with this regulation. After the PDM3700’s implementation, mine operators discovered that it interfered with proximity detection systems, thus exposing miners to potential striking and pinning hazards from continuous mining machines. Besides the PDM3700, other electronic devices were also previously reported to interfere with proximity detection systems. MSHA sought the aid of the U.S. National Institute for Occupational Safety and Health (NIOSH) and mining industry stakeholders to determine how the PDM3700 and some other electronic devices and proximity detection systems interact with each other. Accordingly, NIOSH investigated existing standards, developed test protocols, designed experiments and conducted laboratory evaluations. Some interferences were observed to be caused by electromagnetic interference from some electronic devices, including the PDM3700. Results showed that there was no significant interference when the PDM3700, as well as other electronic devices, and the miner-wearable component of the proximity detection system were separated by distances of 15 cm (6 in.) or greater. In the present study, it was found that the PDM3700 and the personal alarm device needed to be at least 15 cm (6 in.) apart in order for them to be used simultaneously and reduce potential interference.

Detecting down-hole incidents in the shale-gas well fracturing process plays an important role in ensuring that the fracturing operations are carried out smoothly. This paper proposes a method to monitor down-hole incidents by extracting the qualitative trend of process variables (QTPV) using qualitative trend analysis. This is based on the consideration that QTPV is similar at different magnitudes of down-hole incidents and that deviations from the normal pattern may indicate a possible incident. Based on this, this paper presents a real-time diagnosis and alarm method of down-hole incidents using a multi-class support vector machine ( MCSVM ) model for qualitative trend classification in real-time. Compared with the traditional modelling process in which process data is directly used as the input item to develop the MCSVM classifier, the proposed method can achieve higher global accuracy, as well as lower false and missing alarm rates, even with limited incident cases. Moreover, successful real-time diagnosis and alarm of down-hole incidents (cracks forming in the strata, channelling near the wellbore area, and sand plugs) are demonstrated. The results suggest that the presented method is a reasonable starting point for monitoring down-hole incidents during the shale-gas well fracturing process. This approach can be integrated into a real-time monitoring and alarm device for field application during fracturing operations.

After receiving high doses of radioiodine the patients have to remain isolated within the “restricted area”, until the radioactivity of the body drops below a certain level. The aim of this paper was to present our alarming system designed to discover patients who attempt to abandon the “restricted area” and inform medical staff about the event. The system consists of a survey-meter with a pancake probe directed towards the corridor. The survey-meter is connected to a trigger circuit which gives a signal in the case when the measured count rate exceeds a preset value. This signal sets “on” the alarm device, blinking light, programmable siren and IP camera, in order to warn the patient and inform the personnel when such a case occurs. In order to test the consistency and sensitivity of our system we measured ten times the ambient dose equivalent, H*(10), from the source of 925 MBq (25 mCi) 131I, kept at a distance of 1 m. The average ambient dose equivalent was 77.73 ± 31.57 (0.084 mSvh-1 per MBq, or 3.1 mSvh-1 per mCi). We measured ten times the same source at various distances (1-2.25 m) from the probe. In each position, the system was triggered. Also we tested the system on 40 patients treated with radioiodine instructed to pass through the corridor. Each of their attempts triggered the system. According to our experience gained over the past few years, this alarm system intended for patients receiving radionuclide therapy ensures a high level of safety for both the patients and medical staff. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 175007 and Grant no. III41007]

The purpose of this paper was to develop a real-time alarm monitoring system that can detect the fatigue driving state through wireless communication. The drivers’ electroencephalogram (EEG) signals were recorded from occipital electrodes. Seven EEG rhythms with different frequency bands as gamma, hbeta, beta, sigma, alpha, theta and delta waves were extracted. They were simultaneously assessed using relative operating characteristic (ROC) curves and grey relational analysis to select one as the fatigue feature. The research results showed that the performance of theta wave was the best one. Therefore, theta wave was used as fatigue feature in the following alarm device. The real-time alarm monitoring system based on the result has been developed, once the threshold was settled by using the data of the first ten minutes driving period. The developed system can detect driver fatigue and give alarm to indicate the onset of fatigue automatically.

This paper discusses the research progress of low-power technology of laser methane sensors for coal mine. On the basis of environment of coal mines, such as ultra-long-distance transmission and high stability, a series of studies have been carried out. The preliminary results have been achieved in the research of low power consumption, temperature and pressure compensation and reliability design. The technology is applied to various products in coal mines, and achieves high stability and high reliability in products such as laser methane sensor, laser methane detection alarm device, wireless laser methane detection alarm device, and optic fiber multichannel laser methane sensor. Experimental testing and analysis of the characteristics of laser methane sensors, combined with the actual application.

This study aims to design an alarming device for patients requiring wrist rehabilitation. Wrist injury due to accident, sports, stroke, and prolonged hand immobilization often requires physical therapy for rehabilitation to reduce pain, improve range of motion (ROM), and regain strength and function. Physical therapists use a goniometer to measure ROM. Although systematic treatment for wrist rehabilitation is physical therapy, current researchers are seeking an alternative and self-educative procedure based on engineering principles. This paper proposes a self-educative assessment and progress tracking design by exploiting an engineering design. This design is aided by a microcontroller, interfaced with sensors and display unit to measure wrist orientation of patients. The sensors measure the ROM of patients. This system uses a buzzer as an alarm tool for the patients during therapy. If the patients have achieved targeted movements, a beep sound would be produced to notify the patients. Thus, patients will be attentive in the treatment and motivated to proceed with the therapy. Visualization of the ROM through the display unit and alarm signal acts as an educating platform. The prototype was administered on five subjects with reduced ROM in wrist. Results showed that the proposed design increases ROM and self-educate the patients with wrist injuries (p

This paper mainly takes the present safe storage cabinet as the research object, carries on the research and the development. Through communicating requirements with enterprises, a set of intelligent safe storage cabinet management system developed to realize centralized management of safe storage cabinet and solve the problem of integrated control of chemical management information and detection information of multiple safe storage cabinets. The system consists of hardware and software. The main functions of the software are various gas detection, temperature and humidity detection, personnel management, chemical use management, alarm and related equipment control. The hardware mainly consists of control center, access control identification, security storage cabinet control, air conditioning control, filtering, and exhaust control and alarm device. The intelligent safety storage cabinet management system solves the complexity of chemical management in large chemical enterprises and greatly improves the work efficiency. With high safety and reliability, the system can understand the status of each storage cabinet in the chemical warehouse in real time and deal with emergencies in time. In the realization of chemical role of information management. The intelligent management of safe storage cabinets in chemical warehouses can achieve real-time control and other aspects have certain innovation.

For the needs that add reversal monitoring and alarm feature to reactor coolant pump of TNPS Unit 1&2, this article analyze the basic measuring principle of several frequently used reversal detector and compare their advantages and disadvantages, chose the most suitable hall sensors for the site condition through comprehensive comparison, then combine with the full-scope digital instrument and control (I&C) system to implement reversal monitoring and alarm device. Practice proved that the device can accurately detect the reversal of reactor coolant pump and raise an alarm to remind operator take response measures at time. This study significantly reduces the risk of motor damage and provides reference for the other similar important rotating equipment's state monitoring.

NB-IoT refers to a cellular-based narrowband Internet of Things, which has become an important part of the Internet of Things. NB-IoT is a new technology emerging in the field of Internet of Things in recent years. It has obvious advantages in technology and application. In addition, the application of narrowband Internet of Things (NB-IoT) technology in the field of fire protection can fundamentally enhance the combat capability of fire fighting forces, avoid fire and reduce the loss of life and property of the people. This thesis analyses and introduces an intelligent fire-fighting system based on the new industry standard, and a smoke-fire detection and alarm device based on the Internet of Things (IoT) platform and Nb-IoT technology. It also puts forward corresponding solutions to the problem of smart smoke, such as the value, advantages and future expectations of the solution.

In the recent past, a few fire warning and alarm systems have been presented based on a combination of a smoke sensor and an alarm device to design a life-safety system. However, such fire alarm systems are sometimes error-prone and can react to non-actual indicators of fire presence classified as false warnings. There is a need for high-quality and intelligent fire alarm systems that use multiple sensor values (such as a signal from a flame detector, humidity, heat, and smoke sensors, etc.) to detect true incidents of fire. An Adaptive neuro-fuzzy Inference System (ANFIS) is used in this paper to calculate the maximum likelihood of the true presence of fire and generate fire alert. The novel idea proposed in this paper is to use ANFIS for the identification of a true fire incident by using change rate of smoke, the change rate of temperature, and humidity in the presence of fire. The model consists of sensors to collect vital data from sensor nodes where Fuzzy logic converts the raw data in a linguistic variable which is trained in ANFIS to get the probability of fire occurrence. The proposed idea also generates alerts with a message sent directly to the user&rsquo, s smartphone. Our system uses small size, cost-effective sensors and ensures that this solution is reproducible. MATLAB-based simulation is used for the experiments and the results show a satisfactory output.

At present, with the rapid development of society, it brings convenience to people's work and life, but also brings many potential safety hazards. Fire is the most common and frequent occurrence of these hazards. Therefore, this paper designs and implements a fire alarm device based on singlechip. When a fire occurs, a large number of smokes and higher temperatures will be generated. The device can detect smoke signals and temperature signals through smoke sensor detection module and temperature sensor detection module, and send them to singlechip to decide whether to alarm. In the specific implementation process, it is divided into two parts: The first part is the hardware design, including singlechip module, sensor module, display module, alarm module and key module. The second part is the software design, which uses C language to develop the alarm system through Keil uVision 4 software. At the same time, in order to make it more convenient for users to use, emergency alarm key and threshold adjustment key are designed, which can realize emergency alarm function and threshold parameter preset function. The experimental results show that the device has stable structure, good performance and practical value.

Drop-out fuse is a common circuit protection device. When a short fault occurs in the circuit, the fusion pipe will drop and the fuse will be disconnected, so as to isolate the fault line. However, in practical application, there is no reliable means and device for remote monitoring, resulting in the failure information can not be found in time. Although the traditional drop-out fuse alarm device can play the role of fault alarm. It has the disadvantages of large time difference and high cost. Based on this, a set of status monitoring and alarm device according to the drop characteristics of drop-out fuse after failure has been developed. The inclination and temperature of the fusion pipe are monitored by sensors in real time, and the data is sent to the master station through wireless communication. When a fault occurs, the operation and maintenance staff can be notified in time to repair the fault point. Through experimental demonstration, it can be concluded that the fuse status monitoring and fault alarm device has stable performance, convenient control and high cost performance. If it is applied to the distribution network, it can shorten the outage time, reduce economic losses and increase user satisfaction.

For many engineering fields, the air flow should be controlled into a safety range to ensure the production safely. A novel flow measurement device was designed for large safety range. A separable structure of the device was proposed to meet the convenience to carry. Magnet and magnetic fluid was selected as an inducting core. The characteristics of the inducting core were researched. The working principle of the measurement and alarm device for air flow safety was introduced and analyzed. The separable structure was designed to achieve two modes of the measuring and alarm device that one mode is for measuring and alarming work and the other mode is for storing and transporting conveniently. A pipe was designed for the air to pass through. Two coils were designed and chosen to be set up at two ends of the pipe to detect the changes of the internal magnetic flux and then alarm for the changes. An adjustment element was designed and set into the pipe to adjust the position of the inducting core to satisfy the requirements of the working conditions. The designed device is feasible to keep the air flow safely and to alarm when the air flow exceeds safety range.

In this study, a novel enuresis alarm device using a miniaturized radio frequency module and disposable sensors made with inexpensive conductive ink was used to teach toilet use for urination with three participants with severe intellectual disability (two males and one female; aged 7–15 years) in a private special education school setting. At study entry, the participants did not use the toilet for urination independently, despite prior training attempts using standard behavioral interventions. For each participant, the enuresis alarm was used as part of a manualized behavior modification program. Two of the participants progressed markedly in the acquisition of toileting skills during participation in the program, but results for the third participant were less clear. Data suggest high staff satisfaction with the device and procedure and several possible advantages over standard behavioral intervention. Thus, an enuresis alarm that comprises state-of-the-art technology may be useful for teaching toileting skills in classroom settings for some individuals with developmental disabilities.

Electrical fire is the most frequently occurred fire accident, and fire sensors with self-cutting and ultrasensitive fire-alarm response capability are urgent to be designed and developed. Herein, conductive reduced graphene oxide paper (RGOP) with hierarchical structure is prepared by a facile evaporation-assisted self-assembly of graphene oxide (GO) dispersion and then reduction by hydrazine hydrate vapor. The oxidative decomposition of RGOP containing sodium chloride (RGOP-NaCl) is promoted by the addition of NaCl. When being exposed to flame, RGOP-NaCl strips are readily ruptured. Based on this distinctive self-cutting performance of RGOP-NaCl under fire attacking, a novel fire detection and alarm device is designed by establishing controlling and operation circuits. Under fire encountering, an ultrafast warning response (approximately 5.3 s) of RGOP-NaCl is triggered. Fire-alarm time of RGOP-NaCl is adjustable by varying the content of NaCl. Furthermore, this RGOP-NaCl has the function of fuse and can cut off the conductive circuit timely under fire attacking. This finding will provide a novel thought for the design of advanced fire-alarm sensor and will also expand the application of graphene paper.

In this paper, a series of electromagnetic compatibility tests were carried out on a combustible gas alarm device. In order to ensure the Electrostatic Discharge (ESD) performance of the device, some targeted solutions for electrostatic protection were proposed. Finally, the device passed the test based on analysis and rectification and met the evaluation index in GB/T 1726.3-2018 well, which is very significant to improve the quality and reliability for this kind of products.

Epilepsy is a serious, potentially fatal neurological disorder which often requires the immediate attention of a caregiver. Common symptoms of epileptic seizures include sudden fluctuations in heart rate and involuntary muscular contractions (seizures). They can also be accompanied by nausea, dizziness, etc. The sudden onset of a seizure during driving may lead to accidents and its occurrence during sleeping hours could prove fatal if no immediate, proper attention is provided by a caregiver or a doctor. Since the onset of seizures is sudden and its consequences can be severe, it is risky to leave the patient alone. We propose a wireless electronic monitoring system that can accurately predict the onset of seizures a few minutes in advance. We will measure two critical health indicators—brain and cardiac bio-potential signal in the form of EEG and ECG using body sensor networks. The system will utilize a wearable device that detects the symptoms and transmits a coded signal to produce control signals for switching on an alarm device, alerting a doctor or caregiver’s mobile phone using wireless communication with help of GSM modem. A GPS module is used to trace out the exact location of the patient. We will use machine learning to classify whether the sensors indicate an onset of a seizure or not. With this system, we hope to improve the patient’s quality of life and give them dignity.

C-type Clip is a class of connection fittings used for outdoor power distribution equipment and is suitable for the connecting aerial cable with equipment and switch branches. As the monitoring part on the C-type Clip, the currently Overheating Alarm Device still exist some problems. For example, the pop-up device will become unreliable after using too much times. These problems can be solved by using the characteristic of the ferrite soft magnetic material, which can contribute to ejecting and recycling alarm devices. This kind of material will lose the magnetic when achieving the Curie temperature and recover the magnetic when its temperature is lower than the Curie temperature. Use SolidWorks to model the improved Overheating Alarm Device and use ANSYS software to simulate the temperature distribution of ferrite soft magnetic material in a certain period of time. Compared with the reliability of original device, the result of optimization and improvement shows that the reliability of improved device has reached from 80% to 95%.

Wind turbine monitoring alarm device consists of sensing unit, data acquisition module, storage unit and comparison unit. The sensing unit is mounted inside the wind turbine to measure first data including temperature, velocity and acceleration. The data acquisition module is electrically connected to the sensing unit for receiving the first data and configured with a transmitter for transmitting the first data. The storage unit is electrically connected to the data acquisition module. The storage unit is provided with a receiver for receiving the first data transmitted by the transmitter and saves the first data as a warning value. The comparison unit is electrically connected to the sensing and memory unit. The unit compares the second data measured by the sensing unit with the first data used as the warning value. The warning indicator issues a warning if the second data is outside the warning range. The alarm indication relating to the fan monitoring alarm described in the comparison unit gives an alarm via audible and visual alarms.

The paper deals with detection algorithm for rail vibroacoustic waves caused by approaching train on the background of increased noise. The urgency of algorithm development for train detection in view of increased rail noise, when railway lines are close to roads or road intersections is justified. The algorithm is based on the method of weak signals detection in a noisy environment. The information statistics ultimate expression is adjusted. We present the results of algorithm research and testing of the train approach alarm device that implements the proposed algorithm. The algorithm is prepared for upgrading the train approach alarm device “Signalizator-P".

A kind of hot spots detection alarm device and method is proposed in the paper about infrared thermal imaging, including the hardware design, algorithm, software realization. The hardware mainly includes the infrared thermal imaging camera and intelligent analysis board; the algorithm uses connected component detection method based on run length to extract target rectangle coordinates. This design uses the simple character overlapping circuit and superimposes the alarm target rectangle on the composite video. It has high integration level, simple circuit, and can effectively deal with more than 12 bit pixel data. Because FPGA uses the parallel processing, greatly improving the graphics processing speed, it is suitable for embedded applications in high real-time.

Highway maintenance often involves the use of mobile work zones for various types of low-speed moving operations, such as striping and sweeping. The speed differential between the moving operation and traffic and the increasing problem of distracted driving can lead to potential collisions between approaching vehicles and the moving work zone. One novel tool for mitigating this problem is a mobile work zone alarm system. This paper describes the field evaluation of two types of mobile work zone alarm devices: an alarm device and a directional audio system (DAS). Three modes of operation were tested: continuous, manual, and actuated. The components of the evaluation included sound level testing, analysis of merging distances and speeds, and observations of driving behavior. The sound levels for the tested configurations were within national noise standards. All tested configurations increased the merging distance of vehicles except for the alarm actuated setup. The DAS continuous setup also reduced vehicle merging speeds and the standard deviation of merging distance. Some undesirable driver behaviors were occasionally observed, but it was unclear whether these driver behaviors were caused by the presence of the mobile work zone alarm device. Factors such as horizontal and vertical curves and movement of the vehicle with the truck-mounted attenuator caused false alarms and false negatives. The research demonstrated that mobile work zone alarms have the potential to be an effective tool in improving safety. Further refinements to the systems could improve effectiveness.

Construction is a hazardous industry in which accidents occur frequently. Occupational accidents at construction sites are a serious public health issue in Korea. Construction site conditions often create dangerous situations by requiring workers and heavy equipment to work in close proximity to each other. In 2015, approximately 11% (46) of the 437 occupational fatalities in the construction industry in Korea resulted from workers colliding with objects or equipment. In this paper, we present a proximity warning system developed to address this issue and enhance safety at construction sites. The proposed technology functions in real time to alert workers and equipment operators of hazardous proximity situations. Also, when the radio frequency identification (RFID) sensor detects an approaching worker, the main board instantly shuts down the excavator for the prevention of accident. This system contains an RFID tag, RFID reader, alarm device, camera, a display device (the Around View Monitor), and excavator control technology. A field test demonstrated successful performance of the proposed system. It is widely applicable in small construction fields alongside excavators and other equipment because this system does not require additional communication infrastructure, such as servers.

Aiming at the demand of anti-theft and got back for vehicle, the author puts forward a new design mind of anti-theft device. The device takes STC89C52 microcontroller as the control core, the GPS module and the GSM module are connected to the microcontroller serial port through the electronic switch chip. Once the car is stolen, the device will send out sound and light alarm and send car location message to the owner at the same time, helping the owner to get back the car. Field tests show that the alarm device is reliable and has a positive effect on the car theft.

Background This paper presents our findings related to the treatment of children with nocturnal enuresis using our own rehabilitation system. The basic three elements of the therapeutic process include: 1st stage: assessment of the way in which a child urinates; 2nd stage: treatment of bladder dysfunctions; 3rd stage: learning to wake up in order to urinate. Methods Medical records of 198 children were used in the study. Group 1: children with monosymptomatic nocturnal enuresis. Group 2: children with polisymptomatic nocturnal enuresis. Group 1 was treated with the use of alarm device (AD). The treatment in group 2 started with the urotherapy and pharamacotherapy of bladder dysfunctions, if the treatment was effective a therapy with the use of alarm device was recommended. Results A therapy with an AD was carried out in 122 children, 6 started to wake up without episodes of NE that would trigger the alarm, in 31 the ability to wake up in order to urinate developed in the first month of the therapy, 35 were cured after 2 months, in another 5 children the therapy was continued and was successfully completed in the 3rd month of using the AD. In total, 77 children (63.1%) treated using AD were considered as cured. Conclusions The system for the treatment based on the functional division is effective both in children with normal bladder function and in patients with symptoms of urinary tract dysfunction. The treatment with AD is more effective in children with monosymptomatic than with polisymptomatic nocturnal enuresis.

This paper summarizes the position detection and location estimation method, and it has a analysis of the position type alarm classification and related technical problems based on that; Position type alarm system related control algorithm is proposed and the related design, combined with the actual design of the circuit debugging steps and specific experimental parameters is given, the practice shows that the stability and reliability of design.

In this study, we make a study of a new two-level configure gas technology. This technology can expend the configure gas device's dilution ratio and combined with inner set baffled spiral cast to achieve a full-sacle configure gas of SF6 and air. Further to make the SF6 leaking alarm testing device to be not only a multi-function portable device but also have the advantages like compact structure, light weight, large dilution ratio, high accuracy, degree of automation and so on. And this device can solve the situation of SF 6 leaking alarm device can't calibrate conveniently in indoor workplace, such as electric power system GIS obviously.

The article introduces the research and application situation of coupling alarm in pressure operation, and comprehensive analysis advantages and disadvantages of two coupling alarms which used widely, according to the defections of coupling alarms, the article puts forward some key problems and solutions. it is concluded that coupling alarm will be a development trend in the future pressure operation, which can be extended future.

The polyurethane sheet is an important part of automotive interior trim. For a long time, the measurement and recording are both accomplished by hand. It has problems such as low measuring precision, low working efficiency. Accordance with the existed problem of polyurethane sheet measurement, we developed an online measurement for polyurethane sheet and code-spurting system. The system measures the thickness through two channels using laser displacement sensors. PLC collects data and controls the alarm device. Weighing is completed by belt scale and weighing instrument PT650D. Host computer software communicates with slave computer through serial interface. It not only makes data processing and storage function true, but also can make database operations such as data query, statistics and so on. In order to be convenient for quality tracing, the system sets and prints a number for each block. It also can print irregular information such as thickness and weight.

Recoil distance is an important evaluation index to reflect the performance of gun recoil mechanism. It can not allow to fire of artillery if recoil distance exceeding the prescribed distance. So it played an important role to ensure the normal firing of artillery. Previous artillery recoil distance is read by artificial indicator through the recoil, which affects the firing efficiency and has no conducive to the implementation of fast attack. This paper designed the gun recoil distance memory and alarm device by using the sensor technology and SCM programming. The device not only can record the recoil distance of each firing projectile and the total number of it but also can alarm if the recoil distance exceeds the specified maximum. The device effectively solves the problem that the recoil indicator artificial read and record. It has practical significance to improve the efficiency of the shooting.

Introduced one ultrasonic ranging alarm device based on SN8P2501B microcomputer, it mainly included ultrasonic emission circuit, receiving circuit, keyboard, alarm circuit and the software. Compared with the traditional ranging methods, the system used 555 time-base circuit to produce ultrasonic, and designed a temperature compensation circuit to eliminate effect of sound velocity produced by the environment temperature. The practical application results show that the ranging system is stable , reliable and highly accurate, so the technology and methods adopted in the system are highly practical and worthy of being used abroad.

Drivers drunk driving can bring a lot of harm. The paper studies a device that is placed in the car to detect whether the driver is drunk driving. The system consists of a core processor, an alcohol sensor, a display device, and an alarm device. The fitting curve of the alcohol sensor was determined through experiments, and the correspondence between the output voltage and the alcohol concentration was obtained. The design can detect the state of the driver’s alcohol concentration in real time in the car. When the system thinks that the driver’s alcohol concentration exceeds a certain value, a voice alarm is issued, and the device can effectively prevent the driver from drunk driving.