Method for enlarging moving-coil geophone magnetostatic field and a moving-coil geophone

Abstract

The present invention relates to a method for augment static magnetic field intensity of moving-coil geo-phone and a moving-coil geo-phone. Winding coil by plane winding type on the alnico surface between upper and lower magnetic boots on moving-coil geo-phone to form multiple helix coils; supplying constant DC current to helix coils and then the magnetic field direction caused by helix coils is identical to the magnetic field direction of alnico. A moving-coil geo-phone comprises of coil rack, coil winding of upper and lower signal, alnico, upper and lower magnetic boots, and helix coil winding by plane winding type, the helix coil and signal coil on coil rack on coil rack are connected parallely, which are connected on signal transmitting line in series. The present invention has simpleand reasonable structure, improves the sensitivity and capability of cymoscope efficiently.

Description

technical field [0001] The invention relates to a geophysical exploration construction tool for improving the performance of a geophone, in particular to a method for increasing the static magnetic field of a moving-coil geophone and a moving-coil geophone. Background technique [0002] The geophone is a key component to realize vibration signal testing and recording, and the sensitivity of the geophone and its signal characteristics are crucial for subsequent data processing and interpretation. [0003] Among the geophones (sensors) for measuring surface vibrations, this type of vibration signal testing is completed through electromechanical conversion based on the principle of electromagnetic induction, with low manufacturing cost and easy implementation of technical methods. The main factors affecting the sensitivity of this type of sensor are the strength of the static magnetic field generated by the magnet and the effective area and number of turns of the receiving coil...

AI Technical Summary

Problems solved by technology

The main factors affecting the sensitivity of this type of sensor are the strength of the static magnetic field generated by the magnet and the effective area and number of turns of the receiving coil. Due to the performance of the current magnet material and the fixed structure of the detector, by increasing the magnetic field of the magnet and the number of turns of the coil Waiting to realize the improvement of geophone sensitivity encounters technical bottlenecks, so that the typical value of single sensitivity of this type of geophone is generally less than 30V / m / s, and has not been significantly improved in the past 20 years; with the high-precision, high-resolution seismic exploration activities It is of great significance to improve the sensitivity of the geophone

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