Method for improving laser automatic measurement precision of tunnel deformation in construction period
A technology of automatic measurement and laser ranging, which is applied in measuring devices, using inertial force for acceleration measurement, using optical devices, etc., can solve problems such as large errors in measurement data and affect the reliability of monitoring results, so as to ensure reliability and improve The effect of laser automatic measurement accuracy and reduction of tunnel deformation measurement error
Active Publication Date: 2021-06-15
中国人民解放军军事科学院国防工程研究院工程防护研究所 +1
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[0004] In order to solve the existing laser automatic measurement technology for tunnel deformation during the construction period, the existing problems of large measurement data errors and affecting the reliability of monitoring results, the purpose of the present invention is to provide a method for improving the accuracy of laser automatic measurement of tunnel deformation during the construction period, namely On the one hand, it is possible to identify whether a ranging interference event has occurred in the current tunnel based on the difference between the distance measurement before and after and the comparison result between the front and rear deformation rates and the preset threshold, and then discard invalid ranging results and delay ranging to avoid ranging interference On the other hand, in the deformation calculation, by introducing the current distance value corresponding to the fixed pile target arranged directly under the tunnel vault position, the installation position of the laser ranging device—the deformation of the tunnel vault position can be perceived, In turn, the current coordinates of all fixed targets in a relatively stable fixed Cartesian coordinate system can be converted, which can effectively reduce the tunnel deformation measurement error, improve the accuracy of tunnel deformation laser automatic measurement during the construction period, and ensure the reliability of tunnel deformation monitoring results
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[0053] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that although the descriptions of these embodiments are used to help the understanding of the present invention, they are not intended to limit the present invention. Specific structural and functional details disclosed herein are for purposes of describing example embodiments of the invention only. However, the invention may be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.
[0054] It will be understood that, although the terms first, second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing f...
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The invention relates to the technical field of tunnel engineering, and discloses a method for improving the laser automatic measurement precision of tunnel deformation in a construction period. On one hand, whether a distance measurement interference event occurs in a current tunnel can be identified according to a comparison result of difference between front and back distance measurement and comparison result between front and back deformation rates and preset threshold value, and then distance measurement interference influence can be avoided by adopting mode of abandoning invalid distance measurement results and delaying distance measurement. On the other hand, in deformation calculation, by introducing the current distance value corresponding to the fixed pile target arranged under the tunnel vault position, the deformation condition of the mounting position of the laser distance measuring device, namely the tunnel vault position, can be sensed; the current coordinates of all the fixed targets in a relatively stable fixed rectangular coordinate system can be obtained through conversion, so that the tunnel deformation measurement error can be effectively reduced, the tunnel deformation laser automatic measurement precision in the construction period is improved, and the reliability of a tunnel deformation monitoring result is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a method for improving the accuracy of laser automatic measurement of tunnel deformation during construction. Background technique [0002] my country's tunnel construction is constantly setting new world records in terms of length and mileage, followed by safety issues during the construction period of tunnels. Among them, the problem of tunnel deformation is more prominent. In recent years, the new Austrian method of construction has been applied more and more in our country, and the automatic measurement of tunnel deformation has become one of the focuses of the tunnel industry. With the development of control technology, laser automatic measurement technology of tunnel deformation is approaching people's field of vision. [0003] At present, the existing laser automatic measurement technology for tunnel deformation during the construction period is to ...
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IPC IPC(8): G01B11/16G01B11/14G01P15/09
CPCG01B11/16G01B11/14G01P15/09
Inventor 李天斌范俊奇孙国松孔福利周伟郭鹏朱星徐景茂孟陆波
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所