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Movement status sensor for vertical earthquake profile logging instrument

A vertical seismic profile and logging instrument technology, applied in the field of sensors, can solve the problem that there is no such thing as a detection instrument movement state sensor

Inactive Publication Date: 2005-11-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the sensors attached to the vertical seismic profile logging instrument mainly include depth sensors, inclination sensors, cable tension sensors, etc., and there is no sensor for detecting the movement state of the instrument.

Method used

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  • Movement status sensor for vertical earthquake profile logging instrument

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Embodiment Construction

[0014] The motion state sensor of the vertical seismic profile logging instrument designed by the present invention is described in detail as follows in conjunction with accompanying drawings and embodiments:

[0015] The structure of the embodiment of the motion state sensor used in the vertical seismic profile logging instrument of the present invention is as follows: figure 1 As shown, it includes a sensor housing composed of a top cover 4, a bottom cover 3 and a cylinder wall 1, and a magnetic proximity switch 6 installed in the housing. The proximity switch is composed of two upper and lower magnets, and the lower magnet is fixed on the bottom cover. , the upper magnet is fixed on a weight 2, the top of the weight is connected to the bottom of the suspension column 7 inserted into the hole of the top cover and can slide up and down in the housing, the suspension column is hollow, and the wire 5 connected to the proximity switch is placed, the suspension column The top is ...

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Abstract

The invention relates to a motion state sensor of a vertical seismic profile logging instrument, belonging to the technical field of sensors. It includes a shell consisting of a top cover with a central through hole, a bottom cover and a side wall, and a hollow suspension column. It is installed in the shell, and the magnetic proximity switch is composed of two upper and lower magnets. The lower magnet is fixed on the bottom cover. The upper magnet is fixed on a weight connected to the bottom of the suspension column. The top of the suspension column is an electrical interface, and the wire connected to the upper part of the proximity switch passes through the hollow hole of the suspension column and connects to the electrical interface of the suspension column. Connected; also includes indicator light circuit and indicator light, the outer diameter of the casing is the same as or slightly larger than the outer diameter of the logging instrument to be measured; the bottom cover, top cover and side wall of the casing of the present invention are all made of stainless steel Made to adapt to the harsh environment underground. The invention has the advantages of simple and compact mechanical structure, small volume, low cost, no electrification in measurement, relatively safe and the like.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to the design of a magnetic proximity sensor for controlling the motion state of a vertical seismic profile logging instrument in the sensing field. Background technique [0002] From the earliest mechanized limit switches, micro switches and other sensors, to the proximity switches, photoelectric switches, ultrasonic switches and magnetic position sensors used for precise angular displacement measurement after the development of electronic technology, the measurement of the motion state of objects has been carried out for hundreds of years. History. [0003] In oil exploration or well logging, it is often necessary to use logging instruments to detect the situation of downhole oil layers, such as vertical seismic profile (VSP) logging tools used to explore oil layers, during the movement of VSP instruments in oil wells, often need Accurately judge its movement state to ensure the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/40
Inventor 高德文廖延彪
Owner TSINGHUA UNIV