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Vibration analysis is commonly used to assess machinery conditions, earthquake detection, and structural monitoring. Commercially available DAQs (Data Acquisition Systems) feature high costs and limited versatility in terms of end-user hardware/firmware customization, making it difficult to adapt them to the input signal features and add supplementary functionalities. Hence, this research aims to develop a custom acquisition board for detecting vibration signals via IEPE (Integrated Electronic Piezoelectric) sensors, considering the limitations of commercially available systems, and building upon solutions found in the literature. The DAQ board was intended for remote vibration monitoring of infrastructure and machinery for industrial applications, allowing the implementation of predictive maintenance strategies. The proposed DAQ board has two independent and fully configurable channels, which can be set for acquiring signals from IEPE sensors or generic voltage sources. The DAQ board relies on the STM32F401 microcontroller to manage the acquisition from high-speed ADCs, process data, and store them in mass memory (SD card). During acquisition, the DAQ implements a batch acquisition strategy based on a buffer flash memory for temporarily storing ADCs data, which are iteratively poured into mass memory. Also, the board has Bluetooth connectivity to transmit acquired data and receive commands remotely. A prototype of the DAQ board was developed and tested with several waveforms, including vibration signals. The tests showed that the board can acquire vibration signals and compute the FFT onboard. The DAQ demonstrated a good balance between performance, accuracy, flexibility, and cost, making it suitable for several industrial applications and allowing for scalability and integration potential. [ABSTRACT FROM AUTHOR]

Sampling represents an important step of the procedure to perform authenticity tests by ThermoLuminescence (TL). The result of the test could be compromised if this phase is not correctly carried out. During the drilling, in fact, a local temperature increasing could cause a loss of the luminescence signal. In this paper, the comparison between IR thermography imaging and electrical measurements is shown also in order to validate a specific conceived model. The research is aimed at implementing the procedure used to perform the TL tests with the measurement of the temperature reached during the drilling. The measurements were performed using a pottery sherd simulating the collection step. Results show the validity of the model and provide data useful to optimize the sampling in TL test methodology. [ABSTRACT FROM AUTHOR]