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Method and device for accurate measurement of large-range displacement and application

An accurate measurement, large-scale technology, applied in the direction of measurement device, optical device, height/level measurement, etc., can solve the problem of small measurement range, and achieve the effect of improving work efficiency, high precision, and extending the range of distance measurement.

Inactive Publication Date: 2017-03-15
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an accurate measurement method for large-scale displacement, which can accurately measure the large-scale position offset of the target to be measured, and solve the problem of small measurement range caused by the size limitation of the area array CCD element. The measurement range is greatly improved, and the measurement range can be expanded, which is easy to realize the automation and informatization of the measurement process, improves work efficiency and avoids human observation errors

Method used

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  • Method and device for accurate measurement of large-range displacement and application
  • Method and device for accurate measurement of large-range displacement and application

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Experimental program
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Effect test

Embodiment approach

[0055] The position guide includes a photosensitive device arranged in the large space plane range to capture the light signal, and the small space plane range is that a single photosensitive device can perceive the light signal in the measured space plane range. the range of the signal;

[0056] The area CCD element 3 can completely cover the photosensitive device in a certain way, so that the relative position between the area CCD element 3 and the photosensitive device remains unchanged in the covering state;

[0057] When the area array CCD element 3 moves to cover the photosensitive device in a predetermined manner, the position where the optical signal is perceived by a certain photosensitive point on the area array CCD element 3 is the precise position of the optical signal .

[0058] Using this embodiment, the displacement of the target to be measured between two different accurate positions before and after is calculated by summing the displacement of the area array ...

specific Embodiment approach 2

[0062] As a preferred embodiment, the position guide includes a plurality of photosensitive devices, and the photosensitive devices are uniformly arranged as photosensitive units to form a photosensitive unit matrix 7, and the photosensitive unit matrix 7 can perceive the light in the measured space plane. The range of the signal is the range of the large spatial plane.

[0063] Specifically, the photosensitive device is a square photoresistor, photodiode or phototransistor, and adjacent photosensitive devices are closely arranged, and the sensing of the light signal is realized through a monitoring circuit.

[0064] Specifically, a transmission mechanism driven by a servo motor is provided on the side of the photosensitive cell matrix 7, and the transmission mechanism drives the area array CCD element 3 to move parallel to the photosensitive cell matrix 7 to cover the photosensitive cells that perceive the optical signal. device;

[0065] The plane displacement of the area a...

specific Embodiment approach 3

[0067] As another preferred embodiment, the measured spatial plane is perpendicular to the emission direction of the optical signal, and the spatial displacement of the target to be measured is calculated by the following method:

[0068] Measuring the time difference of the optical signal from the laser to the position guide before and after the movement of the target to be measured, and calculating the displacement of the target to be measured perpendicular to the measured space plane according to the speed of light by the displacement-time formula, The spatial displacement of the target to be measured is obtained by adding it to the displacement of the target to be measured on the measured space plane.

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Abstract

The invention relates to the technical field of accurate measurement of displacement, particularly to the technical field of settlement observation, and discloses a method and device for accurate measurement of large-range displacement and application. Through cooperative use of an area array CCD and a position guider, and through combination of two-stage displacement measurement, a distance measurement range is greatly expanded. The device provided by the invention is high in automation degree, the measurement accuracy reaches up to a micron grade, and the device has the characteristics of accuracy, rapidness and wide displacement measurement range. The device can be widely applied to a measurement process of large-range displacement offset, such as high-speed railroad subgrade settlement monitoring and tunnel deformation measurement.

Description

technical field [0001] The invention relates to the technical field of accurate displacement measurement, in particular to the technical field of settlement observation. Background technique [0002] With the rapid development of the country's high-speed rail business, the total mileage of high-speed rail and the railway capacity continue to increase. These put forward higher and higher requirements for the control of railway track subgrade settlement, and also pose greater challenges to the monitoring of subgrade settlement. Traditional civil engineering monitoring techniques include monitoring pile method, settlement plate method, water tube settlement meter method, single point settlement method, etc. These methods all require manual readings, which are labor-intensive and inefficient, and cannot realize automatic detection and remote monitoring. In contrast, optical measurement technology has high speed and high precision, which is conducive to collecting data for digi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/16G01C5/00
CPCG01B11/026G01B11/16G01C5/00
Inventor 马月辉于正航赵慧俊胡楠王婵刘宁宁杨峰涛冯晓琳王娜
Owner SHIJIAZHUANG TIEDAO UNIV
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