新一代电法勘查仪器——伪随机信号电法仪

New generation of instruments for electrical and electromagnetic prospecting——instruments using pseudo random signal

分析了现有电法勘查仪器存在的问题,指出解决这些问题的出路是,利用现代系统科学关于"系统辨识"的新成就,建立全新的电法勘查仪器.推导了基于伪随机信号系统辨识,利用传统电法勘查装置,获得大地系统冲激响应,进而计算阶跃响应和频率响应的计算公式.在此基础上,阐述了建立伪随机信号电法勘查仪器的思路和原理框图,以及新仪器的优点.

Based on the analyzing problems of the traditional instruments for electric and electromagnetic prospecting,it is pointed that the way out for solving these problems lies in using the new results of system identification in the modern systems science,to establish entirely new instruments for electric and electromagnetic prospecting.The formulas for calculating the impulse response,step response and frequency response of the earth system are derived based on the theory of system identification using pseudo random signal.On this basis the ideas and principle diagram for establish instruments of electric and electromagnetic prospecting using pseudo random signal are presented and the advantages of the new instrument are enumerated.