Wire breakage monitoring of Taipinghu Bridge
Brief：The broken wire of steel cable belongs to sudden signal and has no rules to follow, so it must be monitored in real time.
Project Overview
RAME1 working mode: the sensor receives the signal generated by the monitored cable steel wire fracture, and obtains the digital original waveform data through analog filtering and ad analog-to-digital conversion. Do alarm analysis and processing to get alarm status data. Data include: waveform, characteristic parameters, alarm parameters, etc.
Setting, output content and mode of data acquisition and output of steel cable broken wire monitoring:
Acquisition threshold: 3dB higher than the ambient noise, and the empirical value can be initially set to 60dB.
The first alarm criterion: (the comprehensive criterion includes multi parameter fusion, threshold value, duration and other parameter values) is equal to the real signal exceeding the trigger threshold.
The second criterion: the amplitude is higher than the real signal of bad situation noise, such as thunderstorm weather. The noise under bad conditions can be measured or initially determined as 80dB by experience. Output the alarm results, parameters, waveforms and other data to the cloud server (Alibaba cloud and Qingcheng self built cloud platform), in which the secondary alarm results are actively and directly pushed to the user's mobile phone, and the user can also query the cloud server (Alibaba cloud and Qingcheng self built cloud platform) at any time.
The signal characteristics of environmental noise and bad situation noise can also be corrected through actual operation. For example, frequent alarm, after verification, it is likely that the noise signal is set too low, and the noise trigger and alarm threshold are improved. The alarm criterion (data fusion setting, multi parameter criterion setting) and trigger threshold can be adjusted continuously, and finally only the wire breaking signal will give an alarm, so as to realize unattended and accurate wire breaking monitoring and alarm. The monitoring data of broken wire of acoustic emission steel wire rope can also be added to the customer's health diagnosis system.
The alarm criterion (data fusion setting, multi parameter criterion setting) and trigger threshold can be adjusted continuously, and finally only the wire breaking signal will give an alarm, so as to realize unattended and accurate wire breaking monitoring and alarm. The monitoring data of broken wire of acoustic emission steel wire rope can also be added to the customer's health diagnosis system.
