一、 Industry background of road switch machine status monitoring
The road switch machine works frequently, and as one of the most important equipment in the railway system, its working status directly affects the normal operation of the train. Currently, the maintenance of the road switch machine is carried out using a "weekly minor repair, monthly major repair" mode. This mode has low efficiency, increases labor costs, and cannot guarantee the real-time operational performance of related equipment. It cannot promptly troubleshoot rapidly deteriorating faults.To solve the above problems and ensure the safe operation of the railway system, it is necessary to use relevant monitoring equipment to collect and track data from key parts in real time, and autonomously identify potential equipment faults based on fault characteristics, so as to conduct equipment troubleshooting and maintenance in advance. The railway switch machine fault analysis and diagnosis monitoring system obtains and automatically identifies critical equipment fault information through real-time monitoring of equipment status information, diagnoses the severity of the fault, timely reminds and arranges maintenance plans, reduces maintenance workload, ensures safe and stable train operation, and improves transportation efficiency.
二、 The purpose of monitoring the status of road switch machines
At present, the monitoring of the operation status of the electric switch machine system mainly relies on vibration sensors, temperature sensors, voltage sensors, current sensors, displacement sensors, force sensors, and infrared camera devices to separate and capture the vibration signals of the switch machine, internal temperature and rail temperature of the switch machine, driving motor voltage, driving motor current, displacement of the switch relative to the basic rail, switch resistance, and infrared data of the gap position. Then, the captured data is compared with the pre-set standard values. If the difference between the two exceeds the preset range, it is considered that there is a fault in the electric switch machine system during operation.
三、 Applications involved in monitoring the status of road switch machines
The detection of high-speed trains mainly includes lateral vibration reduction and instability of bogies, stability of high-speed train body, monitoring of switch machine status, monitoring of maglev trains, monitoring of train axle box status, monitoring of locomotive ventilation motors, monitoring of pantograph status, monitoring of track subgrade settlement status, and monitoring of subway escalator motor status.
四、 According to the requirements of the turnout comprehensive monitoring system, your company needs to monitor several plans:
1. Close adhesion between the pointed rail and the basic rail, recommended for monitoring repulsion, wide range eddy current displacement sensor D8251 series: D8251 (including signal regulator) displacement measurement system can directly output voltage signals proportional to the distance between the probe and the surface of the conductive object being measured. This sensing scheme can simultaneously measure both static (position) and dynamic (vibration) displacement values. This device is particularly suitable for vibration and position measurement of sliding bearing machines, as well as phase reference and speed measurement.This eddy current displacement sensor system provides state-of-the-art performance, including excellent linear range, accuracy, and temperature stability. All D8251 sensors have good parameter consistency and support interchangeability of probes, expansion cables, and proxies, without the need for special matching or calibration of various components.The D8251 displacement sensor has good long-term reliability, high sensitivity, strong anti-interference ability, non-contact measurement, fast response speed, and is not affected by media such as oil and water. It is often used for long-term real-time monitoring of parameters such as shaft displacement, shaft vibration, and shaft speed of large rotating machinery, in order to analyze the working condition and fault causes of the equipment, effectively protect the equipment and carry out predictive maintenance.
2. Recommendation for close monitoring of the heart track, wide range eddy current displacement sensor D8251 series;
3. Recommended 341CP series for monitoring the vibration acceleration of switch machines: 341CP is an acceleration sensor with a current output of 4-20mA. The loop carrier current signal can be transmitted over long distances without distortion. Its characteristic is the use of ceramic crystals in a circular shear mode as sensitive components, which have the characteristic of maintaining stable output for a long period of time. This high-quality piezoelectric crystal has a high signal-to-noise ratio.The internal circuit of this accelerometer is a two wire circuit system, which can transmit vibration output signals and provide constant current excitation. At the same time, the signal amplification circuit design considers polarity reverse protection. This accelerometer uses laser welding to firmly weld the stainless steel casing and military type joints together; The shell isolation, internal shielding, external environment (including RF, EMI, ESD, and overload) and the impact of misoperation on the product are completely controllable, ensuring excellent repeatability and long-term stability of the product. 341CP provides an M6 threaded hole for secure installation.
5、 Senther products monitor the vibration, temperature and humidity, impact, detachment, and adhesion of turnouts, rails, and switch machines, achieving full life cycle fault pre diagnosis of turnouts and performing fault prediction maintenance
