Anchorage cable stretching automatic monitoring system

Abstract

Disclosed is an anchorage cable stretching automatic monitoring system and monitoring method. The stretching cable thrills through the ground jack center, a pull rod displacement sensor is installed outside the cylinder, a pressure sensor is installed on the oil return pipe, so as to convert measured displacement oil pressure into electrical signals, which are transmitted to the hardware platform for a long distance transmission, and a data acquisition module, a monitoring instrument host containing a central processing unit, a data memory and serial communicating ports, a motor drive module and a data automatic store and output system are set up in order. With programming control, a motor is used to control the opening of the oil valve to realize automatic stretching, and then the stretching velocity and oil pressure signal are used to control the rotary direction and velocity of the motor, thereby achieving controlling the oil pressure. The anchorage cable stretching automatic real time monitoring, feed back, automatic record and report forms print are realized, which not only greatly reduces work intensity and improves efficiency, but also effectively guarantees anchorage cable construction quality. An advanced high precision sensor is used to instead of the existing micrometer and pressure gauge, to realize the improvement of measurement approach, which is used in geotechnical engineering requiring prestressing force exerting and anchorage cable stretching.

Description

(1) Technical field: [0001] The anchor cable tensioning automatic monitoring system belongs to the category of length measurement (G01B), pressure measurement (G01L) and control regulation monitoring (G05B). (two) background technology: [0002] Prestressed anchorage (anchor cable) refers to turning the steel strand into a tensioned structure under high stress for a long time through a special process, so as to enhance the strength of the rock mass reinforced by the steel strand, improve the stress state of the rock mass and improve the strength of the rock mass. body stability. However, prestressed anchoring is a hidden project with complex procedures, many constraints, and difficult to remedy. Therefore, it is very important to do real-time monitoring and strictly ensure the construction quality during the tensioning process of anchor cable construction. The existing anchor cable dynamometer can solve the long-term stress monitoring, but because of its high cost, it canno...

AI Technical Summary

Problems solved by technology

[0004] The anchor cable tensioning automatic monitoring system proposed by the present invention is to solve the problem that the existing dynamometer is expensive and cannot be implemented on each bundle of anchor cable units, and the elongation value cannot be measured; The "dual control method" combined with the measurement of strand elastic elongation has low precision, high labor intensity, low efficiency and can not be monitored in real time

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