Underground shield relative position measuring method based on RFID labels
A technology of RFID tags and measurement methods, applied in measurement devices, height/level measurement, radio wave measurement systems, etc., can solve problems such as measurement accuracy failing to meet technical requirements
Active Publication Date: 2015-06-17
SHANGHAI TUNNEL ENG CO LTD +1
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Problems solved by technology
However, with the continuous increase of the tunnel excavation length, the errors caused by the measurement are also accumulating, which finally makes the measurement accuracy unable to meet the technical requirements of the shield docking
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[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0047] The positioning principle of the RFID tag is mainly as follows: after the RFID tag receives the radio signal emitted by the probe, it will immediately send a feedback signal, and the feedback signal will be captured by the probe. Since the radio signal strength attenuates as the propagation distance increases, the distance between the tag and the probe can be determined after knowing the strength of the RFID tag feedback signal. The stronger the feedback signal, the closer the space distance between the tag and the probe.
[0048] A kind of ground shield relative position measurement method based on RFID tag of the present invention, comprises the steps:
[0049] (1) Please refer to figure 1 , 2 , a plurality of RFID tags 2 are arranged on the cutter head / panel 1 and the partition of the back shield;
[0050] (2) See figure 1 , 3 , ...
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The invention discloses an underground shield relative position measuring method based on RFID labels. The method comprises the following steps that a plurality of RFID labels are distributed on a cutterhead or a panel and a partition plate of a backward shield; the backward shield is started to a preset docking measuring position; the distance between a probe at the front end of a horizontal drill hole and the cutterhead or the panel of the backward shield reaches a preset value; a space coordinate system is established; the relative elevation difference delta h1 and the relative horizontal deviation delta y1 between the probe and the center of the partition plate of a backward shield tunneling machine are measured and calculated; the relative elevation difference delta h1 and the relative horizontal deviation delta y1 are rectified; the relative elevation delta h1 and the relative horizontal deviation delta y2 between the center of the partition plate of a starting shield and the probe at the front end of the horizontal drill hole are determined; the relative elevation delta h and the relative plane deviation delta y between the center of the partition plate of the starting shield and the center of the partition plate of the backward shield are calculated and acquired. Due to the fact that the method is adopted, the underground shield relative position measuring method based on the RFID labels has the advantages of being high in accuracy, easy and convenient to operate and short in construction period.
Description
technical field [0001] The invention relates to a method in the technical field of building tunnel engineering construction, in particular to a method for measuring the relative position of an underground shield based on an RFID tag. Background technique [0002] In the construction of underground projects such as urban rail transit and cross-river tunnels in my country in recent years, a large number of advanced construction methods and construction technologies have been adopted. Due to the small impact on the ground structure and no adverse impact on the environment, the shield tunneling method construction technology has the advantages of low labor intensity, high degree of mechanization, fast project progress, accurate tunnel shape, and high quality. important construction techniques. In the past, when two tunnels that were driven in opposite directions were joined, a shaft was installed in which the tunnels of both sides could continue construction at the arrival poin...
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IPC IPC(8): G01S5/02G01C5/00
Inventor 郑宜枫张冠军李鸿朱卫杰王吉云魏林春袁风波顾沉颖寇晓勇邱裕华张露根
Owner SHANGHAI TUNNEL ENG CO LTD