Shield tunneling machine hob motion trail detection system

Abstract

The invention discloses a shield tunneling machine hob motion trail detection system which comprises an RFID chip fixedly embedded in a shield tunneling machine hob, a reader fixedly arranged on the rear surface of a cutterhead and rotating along with the cutterhead, a wireless communication module and a terminal processing module arranged in a control room. The reader receives the excitation signal, converts the excitation signal into a pulse signal and sends the pulse signal to the terminal processing module through the wireless communication module; and the terminal processing module analyzes and processes the pulse signal, converts the pulse signal into motion trail data and displays an analysis result. According to the shield tunneling machine hob motion trail detection system, the RFID chip only rotates relative to the position of the reader, when whether the hob is damaged or not is analyzed, only the rotation motion of the hob needs to be considered, circumferential motion of the hob and a cutterhead does not need to be considered, data analysis factors are reduced, the data analysis amount of a terminal processing module is reduced, and the detection efficiency is improved. And the state analysis of the hob is more accurate.

Description

technical field [0001] The invention belongs to the technical field of tool state detection, in particular to a motion trajectory detection system of a hob of a shield machine. Background technique [0002] Tunnel boring machines include hard rock tunnel boring machines (commonly known as TBMs in China) and shield machines, among which: TBMs are generally used for mountain tunnels or large-scale water diversion projects; shield machines are mainly used for urban subways and other soft rock and soil strata. Regardless of whether it is a TBM or a shield machine, a disc-shaped hob (hereinafter referred to as the hob) installed on the cutter head seat is provided to directly roll and crush the rock on the broken face. [0003] In the construction process of the tunnel boring machine, when the hob is in normal working state, the hob can rotate with the rotation of the cutter head, and continuously contact with the face during the rotation process, cutting through the way of rolli...

AI Technical Summary

Problems solved by technology

Once the hob does not rotate with the rotation of the cutterhead, the hob will be eccentrically worn or even chipped. At this time, it needs to be repaired in time, otherwise it may cause damage to the cutterhead surface or the cutter hub, and expand economic losses.

Taking the shield machine as an example, during excavation, because there is a balance cabin facility behind the cutter head of the shield machine, and the hob may directly penetrate into the soil and be blocked by the soil during excavation, it is impossible to visually observe the motion state of the hob. In addition, The space structure of the cutter head of the tunnel boring machine is small, and it is difficult to embed and install various motion track sensors; even if various visual sensors are installed, it is difficult The sensor poses a great threat. At the same time, the harsh environment will interfere with the collection and transmission of the sensor signal. When the tunnel boring machine is working, the cutter head and the hob are always in the state of rotating around the axis. It is difficult for the sensor to transmit the signal to the location through wiring Control room behind the cutter head

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