| Photoelectric-integrated acceleration seismic geophone has some features, such as small size, efficient immunity to interference, and fitting to work in the powerful electromagnetic and high or low temperature environment, so it has better applicable foreground. But because of low acquiring data, poor real-time feature and the difficulty of large data acquiring, the development and application are limited. The paper proposed resolution based on a new optimized demodulated scheme, a novel reconfiguring SOPC (System On Programmable Chip) scheme and the integrated, digital intelligent and systemic modern sensing system. By these methods, the photoelectric acceleration sensor system could apply to the guide of the missile, the aircraft navigation, the vibration remote sensing of large instrument,the oil seismic exploration and so on. Especially, the research can help to generalize the interforometric photoelectricity acceleration seismic geophones which have achieved by subject team.The subject is the sequential reseach of the item of theory and experimentation reseach of hybrid-integrated optical acceleration seismic geophone (No. 49874031) and the item of theory and experimentation reseach of photoelectricity integrated acceleration seismic geophone imbursed (No. 40274047) by naitional neature science fund. Based on the interforometric photoelectric acceleration seismic geophones which have achieved by subject team, the method of signal processing was research, a new optimize digital demodulation was proposed, photoelectric-integrated acceleration sensor universal digital signal processing system by SOPC was proposed firstly, and the industrial enthenet interface was applied to photoelectric sensor signal processing terminal for the first time. The reseached sensing system has the features of wider frequency bandwidth, high sensitivity, efficient immunity to interference, better real-time, high intelligence and facility to construct high-speed measured net. There are some research tasks in the dissertation, as follows:1. The sensing principle of photoelectric-integrated acceleration seismic geophone was deduced, and the features of some typical senser that the subject team had reseached were analyzed, which established the base of the reseach of digital signal processing system.2. Based on the analyse of traditionary demodulated technique, combined the demodulated technique of PTAC and synthetic-heterodyne, the improved theory and optimized method of demodulation were proposed. Considering the unsymmetrical output of 3×3 coupler, the 3×3 coupler output design scheme and non-carrier demodulation theory with interferomitric integrated acceleration seismic geophone were proposed.3. By Simulation of Simulink tool, the demodulated theory was verified, and the relation of system input and output was analyzed in the ideal and noise circumstance. The experiment results of simulation indicate that the method has achieved wider dynamic work frequency, 10 rad non-distortion demodulated scope and other simulated parameters.4. The SOPC design scheme and achieved method of novel digital signal processing system were proposed, which could achieve integrated acquiring and sensor network teminal processing by real-time working of DSP and microprocessor with 400M work frequency, 400K sample frequency and 0.001V precision. By Labview and SOPC system, the experiments of vibration platform verify, system verify, virtual locale and actual environment test were achieved.5. Based on TCP/IP technique and C/S and B/S framework, high-speed and low error rate sensing network systemetic structure was established with 10/100M transmission rate. Industrial ethernet interface was applied to photoelectric-integrated sensing signal processing terminal for the first time, and a novel intelligent and digital signal processing resulution of embedded ethernet sensing network was proposed. It could establish high-speed universal measured network and transmit large data so as to satisfy the requirement of computer analyse system in the field of seismic reconnaissance.
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