Digitalization study on test system of fiber optic GYRO

A digital conversion system that converts GPIB industry bus into USB universal bus has been developed. The output signal of fiber optic gyroscope is received and processed through this system. An friendly human-machine interface is realized by using hardware, which connects Lock-in Amplifier with PC computer, and by using software, which evaluates the performance of fiber optical gyroscope through FOG parameter such as bias stability, scale factor and so on. In this system, the USB interface is connected with PC computer, and the GPIB interface is connected with SR844, but all the interface function is realized through FPGA. With a digital sampling and processing system designed with VC++, the real time controlling procedure, high-speed receiving and sending data can be carried out under Windows platform, and the results can be displayed, too. So the design of the system is flexible. The reliability and the stability will be improved, error rate will be reduced, and the efficiency will be advanced. Meanwhile, standardization and complete digitalization will be realized in the test system for fiber optic gyroscope as well.