Development Of Three-component All-fiber Acceleration Seismic Geophone Digital Signal Processing System

"Development of three-component all-fiber acceleration seismic geophone digital signal processing system" is the sub-project of "The theoretical and experimental research on three-component all-fiber acceleration seismic geophone technology" which is supported by Natural Science Foundation of China.Three-component all-fiber acceleration seismic geophone digital signal processing system is a kind of new type signal processing system developed by our research group on the basis of another research production of our laboratory analog signal processing system. This system can realize real time and high precision detection of three components of three dimensions spatial acceleration. The digital signal processing system based on chip TMS320VC5410 of TI sets up an advanced performance signal processing system. When it is joined with the sensor part of three-component all-fiber acceleration seismic geophone, three-component all-fiber acceleration seismic geophone is constituted successfully. It can be widely used in the field of aviation, inertial navigation, earthquake inspection and so on. In this dissertation, firstly, three-component all-fiber acceleration seismic geophone is theoretically studied .In this chapter, we explain simply the principle of optical fiber sensor and the relationship between the phase change of interference wave. Secondly, the principles of single-component all-fiber acceleration seismic geophone and three-component all-fiber acceleration seismic geophone are illuminated briefly. Thirdly, the theory of signal processing circuit of geophone is analyzed. At last, the principle of digital signal processing system is deeply studied and the design method of digital filter is given.On the basis of above theoretical study, the hardware and software of the digital signal processing system are designed successfully. The testing sample is developed smoothly, meanwhile, simulating measurements are accomplished. The result shows that output signal of the sample is consistent with the input signal to the sample..