Tri-component digital geophone and acquisition method thereof

Abstract

The invention relates to a signal acquisition device and a method thereof. A geophone comprises a signal acquisition unit, a signal processing unit, a main control unit, a signal communication unit and a power supply; the signal acquisition unit comprises a tri-component acceleration sensor group, and various sensors are electrically connected with the signal processing unit and the main control unit respectively. The digital geophone consists of general-purpose chips with low price and stronger function without lowering performances to cause a circuit to be very compact, which greatly reduces failure rate of the system and acquisition cost and has very obvious economic benefit. Meanwhile, the geophone is provided with a portable lithium battery, a voltage detection circuit and a FLASH memory, which solves a problem of data loss caused by connecting wire failure or power failure and improves safety and reliability of data acquisition. The geophone can be used independently and serially connected with a plurality of geophones to form a seismic acquisition system.

Description

technical field [0001] The invention belongs to the field of seismic exploration, in particular to a signal acquisition device and a method thereof, which are mainly used in geophysical exploration and signal detection. Background technique [0002] Seismic physical prospecting is the most commonly used and most effective prospecting method for oil prospecting, coal prospecting, hydrological and engineering prospecting. Seismic exploration instruments are tools for seismic exploration observation and research, and are key factors in the development of seismic exploration methods and technologies. [0003] The hardware part of the seismic exploration instrument system is mainly composed of multiple geophones at the front end, communication lines and data recording units connected to the geophones. According to the collection command, the geophone collects a certain length of seismic signal and converts it into signal data and sends it to the data recording unit for storage. ...

AI Technical Summary

Problems solved by technology

Conventional geophones are cheap, but the frequency band is narrow (effective frequency is generally between 10Hz and 200Hz), the dynamic range is small (less than 60dB), and it is not suitable for high-precision seismic exploration; the quality is large, it is not easy to carry, and the axial interference is large. Not suitable for three-component detector

In addition, because the output is an analog signal instead of a digital signal, it is susceptible to interference during transmission

The traditional detector is passive, there is no internal circuit, no storage function

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