Search

This paper describes a distance measurement process, tracking the environment, and determining the presence of space obstacles. The ultrasonic module HC-SR04 is used to measure the distance. This module is complemented by a servo motor, which allows gradual monitoring of the surroundings. The way of signaling obstacles in the space is realized via the vibrating motor. All information about the measured distance is then transmitted to the computer via the Bluetooth module, where is created graphical user interface in the MATLAB program. The system is designed to enable orientation in space for people with visual impairments.

The proposed article introduces a design of low-cost and low-energy home health-care monitoring system. The developed prototype is capable of measuring the three primary diagnostic modalities: electrocardiogram, photoplethysmogram, and body temperature. During the bio-signals acquisition, the data are visualized on the screen in the real-time and simultaneously transmitted to the computer for the subsequent processing.

The topic of the article is analysis of circuits for active electrodes used at capacitively coupled measurements. The work compares differences between wet and insulate electrode. There is analyzed circuit for active electrode which uses integrated voltage follower and there are also presented and simulated improvements for proper using this kind of active electrode for capacitively coupled electrode. Each of these simulations was performed in TINA SPICE - based analog simulation program by Texas Instruments. Finally, the article presents a solution for an operational amplifier integrated into the active electrode to prevent saturation of its inputs. This solution ensures to ground operational amplifier input in the case of overrunning threshold value.