Multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system

Abstract

The invention discloses a multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system used in geological exploration. The system comprises a computer, a system on programmable chip (SoPC) control circuit, a high-voltage power supply, a high-voltage power supply bridge, a current sampling and separation amplifier, a channel input / high voltage output control circuit, a cable, electrodes, a radio-detector, a preamplifier, a filter, an analog to digital (AD) converter and a data storage. The system has the characteristic of multiple functions, and can be used for time-domain electrical exploration, frequency-domain electrical exploration and seismic exploration; when the system is used for measuring electrical signals, the transmitted power can be more than ten kilowatts, so the system has the characteristic of high power; the system can realize multi-channel measurement and rolling measurement so as to greatly improve the working efficiency; and the data in multiple channels are acquired at the same time, and the data sampling speed is up to ten microseconds, so the time precision is improved.

Description

technical field [0001] The invention relates to geophysical prospecting technology in geological prospecting, in particular to a multi-functional, high-power, multi-channel, rolling and fast surveying electrical seismic comprehensive surveying system. Background technique [0002] Electrical prospecting technology is the most widely used geophysical prospecting method in geological prospecting. It is a geophysical prospecting method for detecting geological structures, ore prospecting and water prospecting based on differences in resistivity and polarization characteristics of rock and soil and rocks. Conventional electrical prospecting usually uses one channel to measure the power supply current and then measures the potential signal in time division. There are fewer measurement channels and the work efficiency is low; the current high-density electrical method instruments are mainly designed for engineering exploration, although the number of measurement channels is more ...

AI Technical Summary

Problems solved by technology

Conventional electrical prospecting usually uses one channel to measure the power supply current and then measures the potential signal in time division. There are fewer measurement channels and the work efficiency is low; the current high-density electrical method instruments are mainly designed for engineering exploration, although the number of measurement channels is more (generally dozens or more), but the power is small (generally several hundred watts), and the measurement depth is shallow, so it cannot be used for mineral or other exploration of hundreds of meters

Moreover, the current high-density electrical instruments generally cannot perform continuous rolling measurements. After measuring dozens of channels, they need to be moved and arranged before re-wiring for measurement. That is, the cables that have already been tested or are still to be measured need to be moved again to measure the following measurement points. The current electrical instruments are generally divided into DC instruments and AC instruments. General DC instruments cannot measure AC signals, and general AC instruments cannot measure DC signals. Current electrical instruments cannot use For seismic exploration, seismographs cannot be used for electrical exploration

Seismic exploration technology uses seismographs to detect geological structures by measuring seismic waves to solve problems such as engineering geology and energy geology. Generally, the measurement of electrical signals is not considered, that is to say, the function is single

Electrical instruments cannot be used for seismic exploration and have few functions

In short, traditional geophysical instruments have disadvantages such as low power, single function, fewer channels, fixed array measurement, and slow measurement speed.

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