"This system really saves us a lot of things! With it, the fire hazard of passenger trains is greatly reduced, and we are more practical with the value of the car!" On the K9614 train bound for Lijiang in Kunming, the flight attendant Li Songbiao slowly slides on his "tablet computer" while he is happy to introduce the remote monitoring system for the wiring temperature of the electric control cabinet of the passenger car used in the Kunming depot. Ceiling Diffusers,Ceiling Vent Diffuser,Ceiling Ventilation Grill,Ceiling Diffusers And Grilles Guangzhou Jointair Co., Ltd. , https://www.jointairaccessories.com
Recently, the remote monitoring system for the wiring temperature of the first set of passenger electric control cabinets of the national railway independently developed by the Kunming Railway Bureau has been successfully tested for half a year. The system uses modern temperature measurement technology, Zigbee technology, high-sensitivity Bluetooth and wireless LAN and other short-range wireless communication technologies to realize real-time intelligent monitoring of wiring temperature, which greatly improves the monitoring level of wiring temperature.
The "tablet computer" held by Li Songbiao is the handheld terminal device of the system, which shows the wiring temperature in the electrical control cabinet of each car. Once the temperature data turns red, the corresponding wiring temperature exceeds the safe value, that is, the passenger car has a fire hazard and needs to be handled immediately by the crew.
There are a large number of wirings in the passenger electric control cabinet, and the distribution is scattered. Among them, AV380 volts, DC 110 volts and DC 600 volts are the most serious sources of fire hazards for passenger trains. Therefore, the electrical control cabinet wiring temperature monitoring is the focus of fire protection on passenger trains.
In the past, the temperature measurement patch was usually attached to the temperature-sensitive wiring to monitor the temperature of the wiring. When the flight attendant train was running, the electrical control cabinet was continuously opened to check the temperature patch changes. The inspection workload was very large and easy to miss. Missing repairs.
The wireless temperature measurement sensor used in the temperature remote monitoring system is small in volume and high in temperature sensitivity. After fixing with a high-temperature nylon cable tie, the temperature between -25 °C and 105 °C can be accurately measured. The temperature data collected by the electrical cabinet host is uploaded to the system handheld terminal device through the car node and the Bluetooth module.
The handheld terminal device hardware uses a stable tablet computer and uses Android-compatible self-developed software. If the temperature of the temperature measurement point is exceeded, the handheld terminal device will automatically pop up an alarm window and play the voice “Please note that the temperature is over limit†and accompanied by a vibration reminder.
“In the past, in order to ensure that the wiring temperature in the electrical control cabinet did not exceed the limit, we would open the electrical cabinet every 3 hours to check whether the temperature patch was discolored. It took more than an hour to complete the whole train inspection. The temperature of the entire train equipment is clear at a glance." Li Songbiao praised the changes brought about by this system.
Currently, the bureau is studying how to apply this system to train axle temperature monitoring.