Study on Micro Force Sensor and its Signal Acquisition System Based on Android and Arduino

摘要

Force sensor becomes more and more miniature in order to achieve precise measurement in small place. A magnetostrictive micro sensor was proposed in the paper; meanwhile, the signal acquisition system was designed by Android platform and Arduino MCU to meet the popular mobile terminal. The structure of sensor and the hardware and software of system were designed to realize the functions of force signal acquisition, processing and analysis, and upload the data to mobile terminal in real time. It can be seen from the experimental tests: Firstly, the volume of sensor was less than 2 cm 3 and had good linearity, while the sensitivity was 0.1537 mV/N and the repeatability error was 1.07%. Secondly, the system could effectively enlarge the output value of sensor more than 100 times and the nonlinear error was less than 1.5%, while the linearity and sensitivity can be kept well. This sensor with acquisition system had the advantages of easy realization, low cost, strong expansibility and simple operation, and it can be widely used in industrial control, mechanical automation, intelligent robot, and so on. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.