Online crane beam stress monitoring and fault diagnosis system and method

Abstract

The invention provides an online crane beam stress monitoring and fault diagnosis system which comprises a plurality of stress sensors and wireless transmitting nodes which are all arranged on a crane beam, a wireless receiving station and a remote microprocessor. The stress sensors transmit collected stress signals to the corresponding wireless transmitting nodes the wireless transmitting nodes transmit the stress signals to the wireless receiving station, the wireless receiving station then transmits the stress signals to the remote microprocessor, and the stress signals collected by the stress sensors are compared with corresponding stress thresholds; position distribution of the stress sensors are acquired through rain-flow counting method fatigue life analysis, load sensitivity analysis and independent fatigue damage model based uncorrelated load vectors under local load and overall load. Implicit leak detection of the crane beam under the condition of variable load of width of a complicated production field and signal interference and attenuation during wire transmission are avoided, fatigue damage is ensured not to occur to the beam under the conditions of full life circle and full load, and safe production is guaranteed.

Description

technical field [0001] The invention belongs to the field of traffic safety monitoring, in particular to a system and method for on-line stress monitoring and fault diagnosis of a traffic beam. Background technique [0002] At present, in order to ensure the safe operation of driving, most of them adopt the method of monitoring the driving position or distance. In the few methods of monitoring the state of stress and strain, the layout of the strain gauges cannot ensure that the fatigue damage that may occur in the material under all possible load conditions can be monitored. At present, most of the dynamic stress signal acquisition of metal structures still stays in the wired way. For the working environment where it is difficult to arrange a large number of shielded wires such as driving beams, long wires will introduce electromagnetic interference, and at the same time consume a lot of manpower and time. Useful for remote monitoring. Contents of the invention [0003]...

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Problems solved by technology

[0002] At present, in order to ensure the safe operation of driving, most of them adopt the method of monitoring the driving position or distance. In the few methods of monitoring the state of stress and strain, the layout of the strain gauges cannot ensure that the fatigue damage that may occur in the material under all possible load conditions can be monitored

At present, most of the dynamic stress signal acquisition of metal structures still stays in the wired way. For the working environment where it is difficult to arrange a large number of shielded wires such as driving beams, long wires will introduce electromagnetic interference, and at the same time consume a lot of manpower and time. Facilitate remote monitoring

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