TD-DAQ: A low-cost data acquisition system monitoring the unsaturated pore pressure regime in tailings dams

MADV-DAQ: Multi-channel Arduino-based differential voltage data acquisition system for remote strain measurement applications

“…The 5 000 mAh LiPo battery supplies a nominal output voltage of 3.7 V that varies from 4.15 V when fully charged, down to 3.3 V whereupon the built-in protection circuitry disables the battery. The 5 V voltage supplied by the regulator (Pololu U3V70F5) is within 10 mV of the target value [9] . The current capacity of the voltage regulator was intentionally oversized to reduce any voltage ripple and variation.…”

“…Limited research has been conducted in the past [4] , [5] , [6] , [7] , [8] for SHM of onshore wind turbines and wind turbine foundations; both low-cost wireless sensors and technologies, and commercially available options have, however, proved successful. Following recent examples from the University of Pretoria, whereby low-cost data acquisition systems (DAQ) [9] , [10] and a closed-loop controller for geotechnical centrifuge modelling [11] were successfully developed, a low-cost DAQ for long-term wind turbine and wind turbine foundation monitoring was explored. Commercial DAQ hardware and software ( Fig.…”

“…This is only limited by the physical interfaces supported by the microcontroller. Firmware support in the form of open-source libraries provide out-of-the-box support to interface digital sensors such as SDI12 sensors that are employed for geotechnical investigations [9] .…”

“…The performance of an identical ADC was demonstrated by both Basson et al [9] for the purposes of measuring soil suction in a tailings storage facility (TSF) and Broekman et al [11] for closed-loop control of a geotechnical centrifuge. Basson et al compared the measurements from the Wheatstone-bridge sensors acquired by the low-cost ADC against a commercial DAQ, achieving excellent accuracy and linearity; based on these results, and additional resource constraints owing to the remote installation location of MADV-DAQ, no comparative strain measurements were performed.…”

Distributed I/O as a service: A data acquisition solution to Industry 4.0

“…And sometimes, it is necessary to acquire specific signals which are not supported by the standard DAQ hardware. As a result, it is common to find in the literature papers developing low-cost and open-source DAQ hardware for several different applications [5] , [6] .…”