宽频带电化学地震计的设计及开发

Owning to the increasing lack and external dependence of mineral resources, China is vigorously promoting the strategy of the deep mineral exploration. Seismometer is the most widely sensor used in the upper requirement. Electrochemical seismometer is a new type seismic sensing instrument basing on electrochemical principle developed in the last decade, which can realize the measurement of the ground vibration utilizing the movement of charged ions in the electrolyte. This seismometer possesses numerous excellences, such as frequency bandwidth, large dynamic range, small size, low price, easy to use, and so on. Domestic current research in electrochemical seismometer is almost blank. On the basis of the introduction, digestion and absorption of foreign similar products, this project intends to study the performance at the conditions of different boundaries and physical parameters by modeling and simulation, and designs reasonable structure and size of seismometer. It will be focused on the manufacture of electrochemica transducer and the sealing technology of electrolyte, in order to solve the problem of data consistency and long-term stability of the seismometer. By the combination of theoretical simulation and experimental research, the model parameters of seismometer will be optimized, and the performance improved. This project would lay a good foundation for the electrochemical seismometer being made by ourselves country at an early date.

矿产资源的日益紧缺及对外依存度的逐年提高促使我国大力推进深部找矿战略，地震计是此类探测需求中应用最广泛的一种传感器。电化学地震计利用电解液中的离子运动实现对地面振动的测量，是近十年发展出的一种新型地震传感仪器，具有频带宽、动态范围大、体积小、成本低及使用简便等众多优点，我国目前在电化学地震传感方面的研究几乎处于空白。. 在引进消化吸收国外同类产品的基础上，本项目拟采用建模仿真的方法研究不同边界条件及物理参数对地震计性能指标的影响，设计地震计的合理结构及尺寸；加工制作中重点研究电化学换能器的加工工艺及电解液的密封工艺，以解决地震计的数据一致性及长期稳定性问题。本项目通过理论仿真与加工测试相结合的方式，达到优化模型参数、改善性能指标的目的，为电化学地震计的早日国产化打下基础。

地震计广泛应用于地震探测、资源勘探等工程应用。电化学地震计利用电解液中的离子运动实现对地面振动的测量，是近十年发展出的一种新型地震传感仪器，具有频带宽、动态范围大、体积小、成本低及使用简便等众多优点。本项目基于COMSOL软件建模仿真了不同边界条件及物理参数对电化学地震计的幅频特性及热噪声影响，并基于仿真结果指导加工了不同应用需求的电化学地震计结构；采用柔性电路板结合激光切割技术解决了电化学换能器的加工一致性及产品稳定性问题；采用丁基橡胶作为碘/碘化钾作为橡胶隔离膜材料，解决了抗碘/碘化钾电解液腐蚀及渗透问题。本项目通过理论仿真与加工测试相结合的方式，基本达到了申请书中有关“优化仿真模型及加工工艺”方面的预期目标。