System and method for monitoring pressure inside railway vehicle
A system and a method for monitoring pressure inside a railway vehicle comprise a carriage pressure detection device, a control device, and an alarm device. The control device is configured to receive and process a pressure signal collected by the carriage pressure detection device, perform calculation on and analyze the collected data, and transmit an alarm signal to the alarm device as an alarm when a preset alarm condition is met. When a pressure protection device fails, pressure changes inside the vehicle are monitored in real time by the carriage pressure detection device functioning independently of the pressure protection device.
1. A method for monitoring pressure inside a railway vehicle, comprising:
detecting, by a pressure detection device provided in each carriage of the railway vehicle, pressure in the carriage;
sending a pressure signal of the detected pressure to an air-conditioning unit controller of the carriage;
comparing, by the air-conditioning unit controller, the pressure signal of the carriage with a preset alarm condition, wherein the preset alarm condition is that a pressure change rate in the carriage exceeds a first set value within a first set time and a cumulative number of times that the pressure change rate exceeds the first set value within a second set time range, wherein the first set value of the pressure change rate is any one of 500 Pa/s, 800 Pa/3 s, 1000 Pa/10 s and 2000 Pa/60 s; and
giving an alarm signal to a vehicle network control system in a case that the pressure signal of the carriage meets the preset alarm condition, wherein the alarm indicates that a pressure protection system installed in the carriage has failed.
2. A system for monitoring pressure inside a railway vehicle, comprising a pressure detection device in each carriage of the railway vehicle, an air-conditioning unit controller of the carriage, and a vehicle network control system, wherein
the pressure detection device provided in each carriage is configured to detect pressure in the carriage and send a pressure signal of the detected pressure to the air-conditioning unit controller of the carriage;
the air-conditioning unit controller is configured to compare the pressure signal with a preset alarm condition, wherein the preset alarm condition is that a pressure change rate in the carriage exceeds a first set value within a first set time and a cumulative number of times that the pressure change rate exceeds the first set value within a second set time range, wherein the first set value of the pressure change rate is any one of 500 Pa/s, 800 Pa/3 s, 1000 Pa/10 s and 2000 Pa/60 s, and
the air-conditioning unit controller further configured to give an alarm signal to the vehicle network control system in a case that the pressure signal of the carriage meets the preset alarm condition, wherein the alarm indicates that a pressure protection system installed in the carriage has failed.