Large-span steel structure bridge resistance strain type safety detection device

Abstract

The invention discloses a large-span steel structure bridge resistance strain type safety detection device which comprises a resistance strain gauge, a high-precision constant voltage power supply, a current detection sensor, a current sensor transmitter, an A / D conversion circuit, an embedded simple chip microcomputer system and a computer. The resistance strain gauge is formed by winding constantans in a grid mode and fixed on the surface of a bridge bearing main steel structure, the resistance strain gauge, the current detection sensor and the high-precision constant voltage power supply form a loop, the current detection sensor detects current in the loop, the current sensor transmitter converts the current into a standard signal, the standard signal is subjected A / D conversion by the A / D conversion circuit and then input the embedded simple chip microcomputer system, and the embedded simple chip microcomputer system is connected with the computer through a communication cable and transmits data to the computer. The large-span steel structure bridge resistance strain type safety detection device monitors the deformation degree of the bridge steel structure by detecting current change of the resistance strain gauge so as to avoid bridge accidents.

Description

technical field [0001] The invention relates to a safety detection device, in particular to a resistance strain type safety detection device for a large-span steel structure bridge, which belongs to the technical field of detection equipment. Background technique [0002] Today's long-span bridges are mostly steel structures. When long-span bridges are used for a long time, fatigue deformation caused by long-term loads, or deformation caused by severe overloading of vehicles passing through the bridge, may cause collapse accidents of long-span steel structure bridges , There are many examples of safety accidents in this aspect in real life. In order to ensure the safety of long-span steel structure bridges, it is of great significance to design a device that detects the deformation of long-span steel structure bridges during use and avoid bridge accidents. Contents of the invention [0003] The object of the present invention is to provide a resistance strain type safety d...

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Problems solved by technology

[0002] Today's long-span bridges are mostly steel structures. When long-span bridges are used for a long time, fatigue deformation caused by long-term loads, or deformation caused by severe overloading of vehicles passing through the bridge, may cause collapse accidents of long-span steel structure bridges , There are many examples of safety accidents in this area in real life. In order to ensure the safety of long-span steel structure bridges, it is of great significance to design a device that detects the deformation of long-span steel structure bridges during use and avoid bridge accidents.

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