基于双道激光图像识别的盾尾间隙实时监测技术研究

许超, 贺创波, 熊栋栋, 宋相帅, 温博为

doi:10.3973/j.issn.2096-4498.2021.S2.074

隧道建设 >

2021 , Vol. 41 >Issue S2: 582 - 587

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.S2.074

施工技术

基于双道激光图像识别的盾尾间隙实时监测技术研究

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（1. 中交第二航务工程局有限公司，湖北武汉 430040;
2. 长大桥梁建设施工技术交通行业重点实验室，湖北武汉 430040; 3. 交通运输行业交通基础设施智能制造技术研发中心，湖北武汉 430040）

网络出版日期: 2022-03-18

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Realtime Monitoring Technology of Shield Tail Gap Based on DoubleChannel Laser Image Recognition

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(1. CCCC Second Harbor Engineering Co., Ltd., Wuhan 430040, Hubei, China; 2. Key Laboratory 
of Largespan Bridge Construction Technology for Transportation Industry, Wuhan 430040, Hubei, China;  3. Research and Development Center of Transportation Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan 430040, Hubei, China)

Online published: 2022-03-18

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摘要

针对传统人工测量盾尾间隙数据滞后,无法直观反映盾尾间隙变化趋势的问题,开展盾尾间隙自动化监测技术研究。采用双道激光作为预制标尺，通过工业相机获取盾尾管片图像，对图像进行处理后根据像素距离计算盾尾间隙数值。该测试技术可以在盾构掘进过程中实时测量盾尾间隙变化情况，并先后在多个项目进行了现场测试。由现场测试结果可知: 1)该自动化非接触测量技术能实现盾尾间隙一键式测量,测试过程中不影响盾构正常施工; 2)该测量装置能实时监测盾尾间隙,模拟盾尾椭圆度,监测盾尾变形情况及盾尾与管片的空间状态; 3)采集装置采用双道激光发射器,能精准建立实际距离与像素距离之间的几何关系,提高测量装置的测试精度,使测量精度控制在3.8 mm内。

关键词： 盾构隧道; 盾尾间隙; 图像识别; 实时监测; 双道激光

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许超, 贺创波, 熊栋栋, 宋相帅, 温博为 . 基于双道激光图像识别的盾尾间隙实时监测技术研究[J]. 隧道建设, 2021 , 41(S2) : 582 -587 . DOI: 10.3973/j.issn.2096-4498.2021.S2.074

Abstract

The data of traditional manual measurement of shield tail gap are delayed and cannot directly reflect the changing trend of the shield tail gap. Accordingly, automatic shield tail gap monitoring technology is developed. The doublechannel laser is taken as a prefabricated ruler, the shield tail tube image is obtained through an industrial camera, and the shield tail gap value is calculated according to the pixel distance after image processing. The test technology recommended can measure the changes in the shield tail gap in real time during shield tunneling and has been applied and tested in several projects. The field test results show the following: (1) The automatic noncontact measurement technology can realize oneclick measurement of the shield tail gap, and the test process does not affect the normal construction of the shield. (2) The measurement device can monitor the shield tail gap in real time, simulate the ellipticity of the shield tail, and monitor the deformation of the shield tail and the space status of the shield tail and the tube. (3) The acquisition device adopts a dual laser transmitter, which can accurately establish the geometric relationship of the actual distance and the pixel distance and improve the test accuracy of the measuring device. The monitoring accuracy can be controlled within 3.8 mm.

Key words： shield tunnel; shield tail gap; image recognition; real-time measurement; double-channel laser

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