The anti overturning device for bridge building machines has emerged. The device consists of two main parts: the exploration wheel loading system and the monitoring and control system, and is installed in front of the bridge erecting machine.
The tilt angle sensor can detect the longitudinal and transverse tilt angles of the exploration wheel set and the bridge frame caused by roadbed subsidence at any time. Under the action of the pathfinding wheelset, if the settlement of the roadbed exceeds the specified value, or the inclination of the left and right tracks exceeds the specified value, the monitoring and control system will alarm in a timely manner, cut off the power supply of the driving motor, and use the braking system to make the bridge erecting machine emergency brake, ensuring that the bridge erecting machine does not enter the bad section and avoiding the overturning of the bridge erecting machine.
Sensor H1 detects the lateral inclination angle of the tie rod between the left and right exploration wheels, indicating the lateral inclination angle of the line caused by uneven subsidence of the roadbed; Sensor H2 detects the actual lateral tilt angle of the vehicle body; Sensor L1 detects the actual longitudinal inclination angle of the vehicle body; Sensor L2 detects the longitudinal inclination angle of the lower arm of the anti overturning device; The difference between the longitudinal inclination angle measured by sensor L2 and sensor L1 represents the amount of roadbed subsidence under the vertical load applied by the pathfinder wheel loading system (equivalent to the roadbed subsidence caused by the bridge erecting machine wheel group), which is used to measure the compactness of the roadbed. Compare the above measured quantities with the threshold values determined through research to determine whether the compactness of the roadbed meets the requirements, that is, whether the bridge erecting machine can safely pass through.
The SIS426 series dual axis tilt sensors are based on advanced MEMS technology, with analog outputs and digital outputs such as RS485, RS232, CAN, etc. They have high accuracy, excellent vibration resistance, and long-term stability. In the temperature range of -40-85 ° C, the zero drift is less than 0.2 °, the measurement range is from 0 to ± 90 °, the nonlinearity is better than 0.01 °, and the repeatability is excellent. Due to the advanced anti vibration technology adopted by the sensing unit, the problem of large data changes in the tilt sensor under vibration environment has been solved. The module is insensitive to vibration and can withstand impacts higher than 1000g.
