The electrical measurement system based on digital electrode
基于数字电极技术的电法测量系统

We analyze the features of the electrode array of the resistivity tomography system and the development of digital detectors of the modern seismic acquisition system and introdue the characteristics of digital eletrodes. Then we put forward the design of an electrical measurement system based on digital eletrodes, which will bring about the innovation in electrical survey. The circuit structure of digital electrodes, communication network, the other important techniques and the design of the electrical measurement system are also described. The controling communication network is designed based on DeviceNet Fieldbus technology. Finally we discuss the characteristics of eletrical measurement based on digital electrodes, which can not only be used for resistivity, IP, phase and complex resistivity etc, but also be applied to 2D and 3D electrical measurements in the time domain or frequency domain. This system can measure more parameters of varieties of survey assembly at the same time, which will achieve electrical survey similar to the seismic exploration way.