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A method for measuring shield tail gap of shield machine based on dual-line laser vision

A shield tail gap and measurement method technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of low precision, data cannot be automatically saved and managed, laborious, etc., and achieve the effect of stable and reliable accuracy

Active Publication Date: 2022-07-01
天津恒度量子精密仪器技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the shield construction is carried out by manual measurement, which has problems such as time-consuming, labor-intensive, low-precision, inability to automatically save data, and difficult management.

Method used

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  • A method for measuring shield tail gap of shield machine based on dual-line laser vision
  • A method for measuring shield tail gap of shield machine based on dual-line laser vision
  • A method for measuring shield tail gap of shield machine based on dual-line laser vision

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Experimental program
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Effect test

Embodiment 1

[0046] The invention provides a shield tail gap measurement method of a shield machine based on double-line laser vision, such as figure 1 shown, including:

[0047] Step 1: Collect the double-line laser return image to obtain the intersection of the feature lines of the double-line laser target;

[0048] Step 2: Use the intersection of the two-line laser target feature lines to obtain the shield tail gap distance of the shield machine.

[0049] Step 1 specifically includes:

[0050] 1-1: Use the double-line laser return image to extract the pixel point data of the double-line laser return image;

[0051]1-2: Use the pixel point data of the double-line laser to return the image to calculate the straight line equation of the double-line laser returned image based on the Hough line fitting algorithm;

[0052] 1-3: Calculate the intersection point of the feature line of the double-line laser target by using the straight line equation of the image returned by the double-line la...

Embodiment 2

[0082] The invention provides a shield tail gap measurement system of a shield machine based on double-line laser vision, such as figure 2 shown, including:

[0083] The acquisition module is used to collect the return image of the dual-line laser to obtain the intersection of the characteristic lines of the dual-line laser target;

[0084] The acquisition module is used to obtain the shield tail clearance distance of the shield machine by using the intersection of the two-line laser target feature lines.

Embodiment 3

[0086] The invention provides a practical application method for measuring the shield tail gap of a shield machine based on double-line laser vision, including:

[0087] The image processing algorithm is used to extract the two segment lines projected by the laser structure lines on the segment and the two shield lines on the shield tail shell in the image, and the pixel point information of the light spot is extracted, and the Hough line fitting algorithm is used to obtain the segment. Line and shield line effective spot slope and line equation, where the line equation of segment line and shield line are as follows:

[0088]

[0089] Among them, y is the y-axis coordinate value of the image pixel data returned by the dual-line laser, x is the x-axis coordinate value of the image pixel data returned by the dual-line laser, and k 管_1 is the straight line slope of the pixel point of the image returned by the laser of the first segment line, b 管_1 is the linear parameter of t...

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Abstract

The invention relates to a method and system for measuring shield tail clearance of shield machine based on double-line laser vision. A method for measuring shield tail clearance of shield machine based on double-line laser vision comprises: collecting a return image of double-line laser to obtain double-line laser Intersection point of target feature line; use the intersection point of the two-line laser target feature line to obtain the shield tail gap distance of the shield machine, and calculate and extract key points according to the projection relationship of the two laser lines on the shield tail shell and segment to realize non-contact shield tail The real-time automatic measurement of the gap makes the accuracy more stable and reliable in the measurement of the shield tail gap. It can dynamically monitor the change of the shield tail gap in real time, and can detect the abnormal value of the measurement in time, and provide data for the assembly of the shield machine segment.

Description

technical field [0001] The invention relates to the field of dynamic real-time measurement of shield tail clearance of shield tunneling machines, in particular to a method and system for measuring shield tail clearance of shield tunneling machines based on dual-line laser vision. Background technique [0002] Shield tail clearance measurement is a very important task in shield construction. Shield tail clearance is one of the important parameters of construction control, which can provide important data basis for segment selection and shield attitude control. When the shield tail clearance exceeds the range , which will cause the shield tail brush to wear quickly or the segment to be fractured, or even cause an accident. Therefore, it is necessary to measure the shield tail clearance in real time to guide the shield driver to adjust the propulsion attitude of the shield machine in time. At present, most of the shield construction is performed by manual measurement, and there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/14
CPCG01B11/14
Inventor 邵震宇戴璐璐马鹏亮杜文阳张晓日
Owner 天津恒度量子精密仪器技术有限公司
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