Research On Key Technology And Engineering Realization Of Hydraulic Coupler Monitoring System

Hydraulic couplers are widely used in many industries,such as hoisting equipment,conveying/unloading equipment,crushing operations and other large heavy machinery equipment.And the stable operation of the transmission parts of these equipment will affect the operation of the entire equipment,any abnormal will affect the entire transmission system,or even lead to system paralysis.But for this kind of transmission parts,the method of periodic and timing detection can not detect the abnormal transmission parts in time,and can not give early warning and treatment in time.In order to monitor the running state of the hydraulic coupler in real time and find out and deal with the fault in time,the monitoring system of hydraulic coupler is researched and developed in this paper.This article describes in detail the system principle,component architecture,performance indicators and actual technical applications of the hydraulic coupler monitoring system.Based on the fusible plug of the hydraulic coupler,a new type of sensor is designed,which is based on the RF communication.The sensor can directly monitor the key parameters of temperature and pressure inside the coupler,and the relevant parameters are calibrated.Aiming at the lag of temperature parameters,a temperature proportional differential algorithm is designed.Based on the theory and practice of practical engineering,a reliable design scheme of software and hardware in the design of sensor board level,data pair code,high temperature resistance and power management is put forward.Field data receiving equipment is based on STM32 MCU processor,TDA52235 receiver for data receiving,decoding,transmission and field display.The field data is transmitted to the background terminal through the LoRa LAN.The data terminal is responsible for receiving the data from one or more field transponders,and interacting with the LCD and data server through RS232 communication circuit to realize real-time data monitoring,command processing and alarm.Use LoRa communication technology to ensure the long-distance networking function in the factory area while reducing networking costs.By designing related communication protocols,it can realize the functions of single host to multiple devices at the same time as well as rapid device networking and control.The experimental results show that the temperature calibration error of the sensor is within ±2℃,the pressure calibration error is ±3KPA,the button battery of the sensor can supply power for more than 1.6 years,the LAN networking is convenient and has a high coverage.After a long time of software and hardware testing,the monitoring system designed in this paper has accurate test parameters,stable operation,and can basically meet the requirements of on-site use functions.This system also provides a practical solution for the design of the condition monitoring system for high-power and high-speed rotating equipment.