Infrared thermal imaging based real-time monitoring method for mud cake forming on shield cutter head

Abstract

The invention discloses an infrared thermal imaging based real-time monitoring method for mud cake forming on a shield cutter head. The method is characterized in that an infrared thermal imaging device is arranged in a shield machine, the infrared thermal imaging device consists of an infrared receiving part, a transmission part and an imaging part, the infrared receiving part is used for receiving infrared rays emitted from the cutter head, the infrared rays are transmitted to the imaging part through the transmission part, and the cutter head temperature is displayed in real time by the imaging part. A shield engineer can rapidly learn mud cake forming condition on the cutter head, accurately judge the mud cake forming degree, precisely locate the mud cake forming position on the cutterhead, and then take corresponding technical measures. Compared with the prior art, the infrared thermal imaging based real-time monitoring method does not need to set complex sensing devices on the cutting surface of the cutter head or in a soil bin, belongs to non-contact monitoring methods, has advantages of good real time performance, high efficiency, low failure rate, simple installation anduse and the like, and has important application value in shield machine design and the shield tunneling construction field.

Description

technical field [0001] The invention belongs to the field of shield tunneling engineering, and in particular relates to a method for detecting mud cake on a shield cutter head. Background technique [0002] In recent years, with the rapid development of social economy and urbanization, shield tunneling technology has become an indispensable key technology in the construction of major transportation and other infrastructure in my country, and the strata involved in shield tunneling construction are becoming more and more complex. [0003] During the construction of the shield tunnel, with the rotation and advancement of the cutterhead, the interaction between the cutterhead, the cutterhead and the soil generates heat, and the heat is transferred to the cutterhead in the form of heat conduction. Under normal circumstances, since the excavation surface soil is continuously transported out, the cutter head works normally, the shield thrust and torque are at normal levels, and th...

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Problems solved by technology

[0007] 1. The contact detection device is a single-point detection with a limited detection range, and cannot accurately judge the location and degree of mud cake; when a large number of installations are installed, the installation is complicated and uneconomical;

[0008] 2. The contact detection device, especially the mechanical detection device, has a certain hysteresis;

[0009] 3. The contact detection device is affected by soil extrusion and friction in the excavation surface of the cutter head or the soil bin, and is easily damaged, and the system is complex and the failure rate is high

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