A design of geophone tester based on FPGA

Geophone is a specific sensor in geophysical exploration. The geophone tester is mainly used to test the performance parameters of geophone such as DC resistance, natural frequency, damping coefficient, sensitivity, distortion and so on. Some domestic testers are big, low precision and high power consumption and not suitable for outdoors. The testers abroad are expensive and their performances are not stable. This paper designs a high performance-cost ratio tester based on FPGA. It adopts EDA technology and programmable Cyclone II series FPGA on the platforms of DSP_Builder and Quartus II. On the FPGA, there integrates 24-bit data collector, FIR filter, 32 points FFT, UART and etc. Some testing experiments are fulfilled and the results show that this portable tester is of high precision, low power, and it is easy to be upgraded and maintained.