【作者】 王金海；

【导师】 陈才和；

【作者基本信息】 天津大学 ， 物理电子学， 2007， 博士

【摘要】 光电集成加速度检波器体积小、抗电磁干扰能力强和适合在强电磁场和高温高寒等恶劣环境下稳定工作等特点使其具有广泛的应用前景,但它的数据采集量少、实时性差和大量数据收集困难等问题极大局限了它的发展和应用,论文提出的基于优化的新解调方法、新颖的可重新配置的SOPC(System On Programmable Chip)实现方法和高速传感网络系统设计的集成化、数字智能化和系统化的现代传感系统解决了这些问题,使光电集成加速度传感系统能够在对传感系统有更高要求的导弹制导、飞机导航、大型电器设备的振动遥测及石油地震勘探等领域得到广泛应用,而且可以使得课题组研究成功的各类干涉型光电集成加速度地震检波器推广应用。本文研究是国家自然科学基金资助项目“混合型集成光学加速度地震检波器理论与实验研究”(No.49874031)和“光电集成加速度地震检波技术理论与实验研究”(No.40274047)的后期研究课题,旨在将研究成功的各类干涉型光电集成加速度地震检波器推广应用。论文在课题组研究成功的各类干涉型光电集成加速度地震检波器进行详尽分析基础上,对信号处理作了深入研究,提出了优化的新的数字解调方法,首次创新性提出并行工作的光电集成加速度传感器通用数字信号处理系统SOPC设计方法,首次将工业以太网接口应用在光电集成传感信号处理终端中构成传感网络,使研究的传感系统具有频带更宽、灵敏度高、抗干扰能力强、实时性好、智能化和易于构成高速测线网等优点。论文的主要研究工作如下:1.详细推导光电集成加速度地震检波器传感机制,对课题组研究的几种典型的传感器的特点进行了研究和分析,为数字信号处理系统奠定了研究基础。2.在对传统解调技术对比分析的基础上,结合交流相位跟踪零差补偿技术(PTAC)和综合外差信号解调技术,对解调理论提出了改进和优化方法,并在考虑3×3耦合输出非对称设计的情况下,提出了基于干涉型集成加速度地震检波器3×3耦合输出设计方案和集成加速度地震检波器无载波解调理论。3.利用Simulink仿真验证了解调理论,并详细分析加速度检波器在理想和噪音环境下的系统输入与输出关系,通过仿真得到大量实验结果,经分析得到了比传统方法更宽的动态工作频率和10rad无失真解调幅度范围及其他仿真参数。4.提出了新颖的并行工作的数字信号处理系统电路SOPC设计方案和实现方法,实现了400M工作时钟、采样频率达400K和系统分辨率达0.001V的DSP(Digtal signal processing)与微处理器系统并行实时工作集成化的采集、处理传感网络终端,并基于LABVIEW和SOPC系统样机完成了振动台标定、系统标定、模拟现场和实际环境测试实验。5.基于TCP/IP技术,构建了结合C/S和B/S结构的传输速度达10M/100M的低误码率的高速传感网络体系结构,首次将工业以太网接口应用在光电集成传感信号处理终端中构成高速传感网络,提出一种嵌入以太传感网络的新型智能化和数字化信号处理系统解决方案,构建高速通用测线网络结构,实现海量数据实时传输,满足地震勘探等领域计算机分析和解释系统的需求。更多还原

【Abstract】 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.更多还原