A Robust Coal Mine Roadway Shear Stress Acquisition Method Based on Fault Self-repair
A technology of coal mine roadway and collection method, applied in special data processing applications, force/torque/work measuring instruments, measuring devices, etc., can solve problems such as loss of detection of rods, inability to take out, and failure of strain gauges to be discovered in time.
Active Publication Date: 2017-04-19
SOUTHEAST UNIV
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Problems solved by technology
Due to the small size and thinness of the strain gauge, it is easy to be damaged in the environment of the coal mine roadway, and the data collection of the strain gauge is automatically collected, and there is no real-time monitoring by personnel. Therefore, when the strain gauge fails and is damaged, it cannot be found in time. The collected values are still involved in the calculation, and the wrong moment function fitting and shear stress distribution are obtained. Therefore, when the staff sees the wrong properties of the rod body when checking the structure, they will take corresponding wrong measures, which will affect the work efficiency. It cannot be taken out in large-scale structures. If a fault occurs and cannot be resolved, then the detection of the rod body is meaningless
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[0102] A robust coal mine roadway shear stress acquisition method for fault self-repair, characterized in that it includes the following
[0103] step:
[0104] Step 1: Set the length L of the rod body for the shear stress test of the coal mine roadway, and stick N pairs of strain gauges on the rod body, the interval between each pair of strain gauges is d=L / (N-1), and each pair of strain gauges is directly attached to the rod body , let the number of the strain gauge on the upper layer be X i1 , the number of strain gauges on the opposite layer is X i2 (i=0, 1...N-1, i is the i-th pair of strain gauges), the rod body is installed on the relevant equipment for bending and stretching it;
[0105] Step 2: Evaluation of the output value of the error model:
[0106] Step 2.1: Use relevant equipment to test the shear stress of the coal mine roadway equipped with 2N strain gauges at a time interval of t 1 Perform C times of tensile strain and C times of bending strain respective...
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The invention provides a robust coal mine tunnel shearing stress acquiring method with a fault self-repairing function. The strain degree of a tunnel is generally detected by rod bodies in a coal mine site, distribution of the shearing stress of the rod bodies is measured, strain gauges are arranged on the rod bodies, but the number of the strain gauges is large, the strain gauges are easy to damage, data of the strain gauges are automatically acquired, the acquiring process is not monitored by operators in real time, the strain gauges which fail and are damaged cannot be found out by the operators in time, then wrong bending moment fitting functions and wrong distribution of the shearing stress are obtained, and the strain characteristic of the measured rod bodies of a coal mine tunnel cannot be convenient to observe; and moreover, the rod bodies mounted in the coal mine site are required to be fixed in the tunnel by special cement, when failing and being damaged, the strain gauges cannot be changed, and if the strain gauges are not repaired, the rod bodies can be wasted due to fault of the strain gauges.
Description
technical field [0001] The patent of the invention relates to a robust coal mine roadway shear stress acquisition method for fault self-repair, which belongs to the technical field of measurement, control and automation. Background technique [0002] Shear stress refers to the internal force that interacts between various parts of the object when the object is deformed due to external factors (force, humidity change, etc.), to resist the effect of external factors, and try to make the object return to the deformed position from the deformed position. previous position. For the rod body, accurately grasping the shear stress distribution in the whole length range is the focus of studying the structural characteristics of the whole rod body. [0003] In coal mine roadways, for some large structures (bridges, etc.), the overall deformation of the built-in rod is usually measured to reflect the deformation of the external structure. Accurately grasping the deformation of large s...
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IPC IPC(8): G06F19/00G01L5/00
Inventor 黄永明虞金花章国宝张露吴奥
Owner SOUTHEAST UNIV