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Method and system for measuring shield tail gap of shield tunneling machine based on double-line laser vision

A technology of shield tail clearance and measurement method, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of low accuracy, data cannot be automatically saved and managed, laborious, etc., and achieve stable and reliable accuracy.

Active Publication Date: 2022-04-29
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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  • Method and system for measuring shield tail gap of shield tunneling machine based on double-line laser vision
  • Method and system for measuring shield tail gap of shield tunneling machine based on double-line laser vision
  • Method and system for measuring shield tail gap of shield tunneling machine based on double-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 based on two-line laser vision, such as figure 1 shown, including:

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

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

[0049] Step one specifically includes:

[0050] 1-1: Extract the pixel point data of the double-line laser return image by using the double-line laser return image;

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

[0052] 1-3: Use the linear equation of the double-line laser return image to calculate the intersection point of the double-line laser target feature line;

[0053] Wherein, the double-line laser return ...

Embodiment 2

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

[0083] The collection module is used to collect the return image of the double-line laser to obtain the intersection point of the characteristic line of the double-line laser target;

[0084] The acquisition module is used to obtain the shield tail gap distance of the shield machine by using the intersection point of the characteristic line of the double-line laser target.

Embodiment 3

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

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

[0088]

[0089] Among them, y is the y-axis coordinate value of the image pixel point data returned by the two-line laser, x is the x-axis coordinate value of the image pixel point data returned by the two-line laser, k 管_1 is the straight line slope of the first segment line laser return image pixel point, b 管_1 The straigh...

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Abstract

The invention relates to a shield tunneling machine shield tail gap measuring method and system based on double-line laser vision. The shield tunneling machine shield tail gap measuring method based on the double-line laser vision comprises the steps that double-line laser return images are collected to obtain double-line laser target feature line intersection points; the shield tail gap distance of the shield tunneling machine is obtained through the intersection point of double-line laser target characteristic lines, key points are calculated and extracted according to the projection relation of the two laser lines on a shield tail shell and a duct piece, non-contact type shield tail gap real-time automatic measurement is achieved, the precision in shield tail gap measurement is more stable and reliable, the shield tail gap change can be dynamically monitored in real time, and the measurement accuracy is improved. Measurement abnormal values can be found in time, and data are provided for shield tunneling machine segment assembly.

Description

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

Claims

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Application Information

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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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