Train air tightness test data analysis and early warning system and method

Abstract

The present invention relates to a train air tightness test data analysis and early warning system and method, including an off-board air tightness test part and an on-board air tightness monitoring part, both of which are arranged on the train in advance before the air tightness test, and the off-board air tightness test part is removed after the air tightness test; the off-board air tightness test part includes an off-board system control host, an equipment fan and a plurality of external air pressure detection devices, and the off-board system control host is used to analyze the position of the vehicle leakage point during the air tightness test; the on-board air tightness monitoring part includes an on-board data monitoring host, a train control unit, a passenger information host and a plurality of built-in air pressure detection devices, and the on-board data monitoring host is used to warn of the air tightness attenuation in the carriage during the train operation. The present invention can reduce the danger during the test, and can also monitor the air tightness data of typical positions in the carriage, and issue an early warning for possible air tightness problems in the future, thereby ensuring the safety of train operation.

Description

Technical Field

[0001] The present invention relates to the technical field of train detection, and in particular to a train air tightness test data analysis and early warning system and method. Background Art

[0002] China's high-speed rail trains are in a stage of rapid development. The speed of high-speed trains is getting faster and faster, the functions are becoming more and more complex, and the requirements for passenger comfort are getting higher and higher. Train air tightness is one of the important guarantees for vehicle operation safety and passenger comfort. The quality of train sealing can directly affect the quality of train air tightness. Poor train air tightness will cause passengers to experience ear pain and tinnitus. The complex train operation environment will accelerate the aging and loss rate of train sealants, resulting in a decrease in vehicle air tightness. At present, air tightness tests are only applied to newly built vehicles and level 5 repaired vehicles. It is required that under the condition of vehicle sealing, the carriage is subjected to positive and negative pressure tests with an initial pressure of 4000Pa, the air pressure drop time is measured, and the standard value is compared.

[0003] At present, there are certain risks in the process of leak point investigation during air tightness test, and there are few air pressure sampling points in the carriage, so it is impossible to collect special data for typical locations. In addition, during the operation of the vehicle, it is impossible to collect and analyze the air tightness data of typical locations of the vehicle in a centralized manner, resulting in the inability to issue early warnings for trains with poor air tightness, putting passengers in danger. Summary of the invention

[0004] The purpose of this invention is to comprehensively collect air tightness parameters generated during the production and operation of trains. Through data comparison, maintenance warnings are issued to vehicles to ensure that the air tightness threshold of the train is always kept within a safe range, reduce the risk of cabin decompression, and improve passenger travel safety.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A train air tightness test data analysis and early warning system, comprising an outside-vehicle air tightness test part and an inside-vehicle air tightness monitoring part, wherein the outside-vehicle air tightness test part and the inside-vehicle air tightness monitoring part are arranged on the train in advance before the air tightness test, and the outside-vehicle air tightness test part is removed after the air tightness test is completed;

[0007] The vehicle exterior air tightness test part includes an exterior system control host, an equipment fan and a plurality of external air pressure detection devices. The exterior system control host is connected to the equipment fan via a network bus. The exterior system control host is also connected to each of the external air pressure detection devices via a network bus and wires. Each of the external air pressure detection devices is distributed at a side window to be tested point, an air conditioning unit to be tested point, a plug door to be tested point and a windshield to be tested point.

[0008] The in-vehicle air tightness monitoring part includes an in-vehicle data monitoring host, a train control unit, a passenger information host and several built-in air pressure detection devices. The in-vehicle data monitoring host is connected to the train control unit and the passenger information host respectively through a network bus. Each of the built-in air pressure detection devices is connected to the in-vehicle data monitoring host and the off-vehicle system control host respectively through a network bus and wires, and the built-in air pressure detection device is connected to the external air pressure detection device through a connector. Each of the built-in air pressure detection devices is distributed at the air conditioning condensation outlet to be tested, the body water supply and drainage pipe hole to be tested, the under-vehicle wire hole to be tested, and the protective box and the body connection to be tested.

[0009] When conducting the air tightness test of the train, the off-board system control host controls the equipment fan to provide stable wind pressure for the train compartment, and the external air pressure detection device and the built-in air pressure detection device send the air tightness test detection data to the off-board system control host, and the off-board system control host analyzes and determines whether the air tightness test result is qualified according to the air tightness test detection data. If qualified, the air tightness test detection data is stored as the initial value of the air tightness warning of the on-board data monitoring host; if unqualified, the vehicle leakage point position is analyzed according to the air tightness test detection data;

[0010] After removing the external air tightness test part, during the operation of the train, the passenger information host transmits the train running speed to the in-vehicle data monitoring host, and the built-in air pressure detection device sends the air tightness warning detection data to the in-vehicle data monitoring host. The in-vehicle data monitoring host performs data analysis based on the train running speed and the air tightness warning detection data. If the data analysis result reaches the initial value of the air tightness warning, the in-vehicle data monitoring host sends a train air tightness inspection warning signal to the train control unit, and the train control unit controls the driver's console display screen and the mechanic's room display screen to display the warning information.

[0011] A train air tightness test data analysis and early warning method comprises the following steps:

[0012] 1. During the train air tightness test:

[0013] 1.1 Install the vehicle's exterior air tightness test part and the vehicle's interior air tightness monitoring part. The equipment fan and the vehicle's exterior system control host are placed in a safe location outside the vehicle. Each external air pressure detection device and the internal air pressure detection device are installed and fixed at their respective corresponding test points. After installation, close all vehicle doors and air conditioning dampers, and then dock the connectors;

[0014] 1.2 Start the equipment fan to fill the compartment with air and start the air tightness test;

[0015] 1.3 The off-vehicle system control host analyzes the air tightness test data to determine whether the air tightness test results are qualified;

[0016] 1.3.1 If the air tightness test result is qualified, the in-vehicle data monitoring host will actively collect the air tightness test data of each air pressure detection device recorded by the out-vehicle system control host as the initial value of the air tightness warning;

[0017] 1.3.2 If the air tightness test result is unqualified, the off-vehicle system control host compares the air pressure values ​​of the measuring points measured by all external air pressure detection devices and the built-in air pressure detection device, determines the test point corresponding to the lowest measuring point air pressure value, and then draws the wind direction curve according to the wind direction of the determined measuring point to be tested, and finally finds the leakage point according to the position of the air pressure detection device corresponding to the test point and the wind direction curve;

[0018] 1.4 After the air tightness test is completed, remove the air tightness test part outside the vehicle;

[0019] 2. During the train operation:

[0020] 2.1 The passenger information host transmits the train running speed to the in-car data monitoring host;

[0021] 2.2 Each built-in air pressure detection device transmits the air tightness warning detection data of each test point to the in-vehicle data monitoring host;

[0022] 2.3 The in-vehicle data monitoring host performs data analysis based on the train running speed and air tightness warning detection data;

[0023] 2.3.1 If the data analysis result does not reach the initial value of the airtightness warning, the vehicle will not display the warning information;

[0024] 2.3.2 If the data analysis result reaches the initial value of the air tightness warning, the on-board data monitoring host sends a train air tightness inspection warning signal to the train control unit, and the train control unit controls the driver's console display screen and the mechanic's room display screen to display the warning information.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a train air tightness test data analysis and early warning system and method, which can reduce the danger during the test, monitor the air tightness data of typical positions in the carriage, and analyze the air tightness attenuation data in combination with the train running speed, and issue early warnings for possible air tightness problems in the future, thereby ensuring the safety of train operation.

[0027] (2) Provide detailed data support for train air tightness tests, improve the efficiency of air tightness tests, reduce the time required for test personnel to find leaks, and reduce the risk of the test process;

[0028] (3) Increase the volume of sample data collected, increase real-time monitoring of air tightness at typical locations, and issue early warnings in time for air tightness degradation, thereby reducing the risk of train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the principle of the train air tightness test data analysis and early warning system of the present invention;

[0030] Explanation of the reference numerals: 101, off-board system control host; 102, on-board data monitoring host; 201, external air pressure detection device at the test point of the side window; 202, external air pressure detection device at the test point of the sliding door; 203, external air pressure detection device at the test point of the windshield; 204, external air pressure detection device at the test point of the air-conditioning unit; 205, built-in air pressure detection device at the test point of the air-conditioning condensation outlet; 206, built-in air pressure detection device at the test point of the water supply and drainage pipe hole; 207, built-in air pressure detection device at the test point of the wire hole; 208, built-in air pressure detection device at the test point where the protective box and the car body are connected; 209, connector; 301, equipment fan; 302, train control unit; 303, passenger information host. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0032] like Figure 1 As shown, the train air tightness test data analysis and early warning system includes an external air tightness test part and an internal air tightness monitoring part. The external air tightness test part is only used for air tightness test data collection and leakage point detection on site during the vehicle manufacturing and maintenance stages, and will be dismantled after the test; the internal air tightness monitoring part is used for vehicle air tightness attenuation data monitoring and early warning when the train is running.

[0033] Specifically, the vehicle exterior air tightness test part includes: the vehicle exterior test control host 101, which is the core equipment for the air tightness test of new and overhauled vehicles. The vehicle exterior test control host 101 is connected to the equipment fan 301 through the network bus to control the air tightness test process; the equipment fan 301 is the wind pressure providing device for the air tightness test, which can provide stable positive and negative wind pressure to the car according to the instructions provided by the vehicle exterior test control host 101; the external air pressure detection device is connected to the vehicle exterior test control host 101 through the network bus and wires. The vehicle exterior test control host 101 supplies power to the external air pressure detection device and collects the air tightness test detection data provided by the external air pressure detection device. The vehicle exterior test control host 101 can analyze the vehicle leakage point location range based on the air pressure value and wind direction of the test point provided by the air pressure detection device.

[0034] The air pressure detection device includes: an external air pressure detection device and a built-in air pressure detection device, and the external air pressure detection device and the built-in air pressure detection device are connected using a connector 209. The connector 209 can provide a working voltage to the built-in air pressure detection device and transmit data to the off-vehicle test control host 101.

[0035] The external air pressure detection device must be placed at the test point in advance before the air tightness test and removed after the air tightness test. The detection data measured by the external air pressure detection device include: the air pressure value of the test point and the wind direction of the test point, and the measurement data is transmitted to the off-vehicle test control host 101. Each external air pressure detection device is distributed at the corresponding test point, where the test points include: the side window test point, the air conditioning unit test point, the plug door test point and the windshield test point, such as Figure 1 As shown, the external air pressure detection device includes: an external air pressure detection device 201 for the side window to be tested, an external air pressure detection device 202 for the plug door to be tested, an external air pressure detection device 203 for the windshield to be tested, and an external air pressure detection device 204 for the air conditioning unit to be tested. When the vehicle to be tested has no corresponding test point, the external air pressure detection device may not be installed. The external air pressure detection device is removed after the test because: the above positions can directly observe or feel the air tightness attenuation during the operation of the vehicle, and there are many interference factors in the operation of the vehicle, so the monitoring results are meaningless.

[0036] The built-in air pressure detection device is arranged at the test point in advance during the vehicle assembly process, and does not need to be removed after the air tightness test is completed. Each built-in air pressure detection device is distributed at the corresponding test point, including: the test point of the air conditioner condensation outlet, the test point of the water supply and drainage pipe hole of the vehicle body, the test point of the under-vehicle wire hole, and the test point of the connection between the protective box and the vehicle body, such as Figure 1As shown, the built-in air pressure detection device includes: a built-in air pressure detection device 205 at the test point of the air conditioning condensation outlet, a built-in air pressure detection device 206 at the test point of the water supply and drainage pipe hole, a built-in air pressure detection device 207 at the test point of the wire hole, and a built-in air pressure detection device 208 at the test point where the protective box and the car body are connected. The detection data measured by the built-in air pressure detection device include: the air pressure value at the measuring point and the wind direction at the measuring point. The detection data measured by the built-in air pressure detection device include the air pressure value at the measuring point and the wind direction at the measuring point. When performing an air tightness test, the built-in air pressure detection device transmits the air tightness test detection data used for the air tightness test to the off-board system control host 101; when the train is running, the built-in air pressure detection device provides the air tightness warning detection data for monitoring and warning to the on-board data monitoring host 102.

[0037] When conducting a train air tightness test, the off-board system control host 101 controls the device fan 301 to provide a stable wind pressure for the train car, and the external air pressure detection device and the built-in air pressure detection device send the air tightness test detection data to the off-board system control host 101. The off-board system control host 101 determines whether the air tightness test result is qualified based on the air tightness test detection data analysis. If qualified, the air tightness test detection data is stored as the initial value of the air tightness warning of the on-board data monitoring host 102. For example, the off-board system control host 101 stores the air tightness test detection data in the on-board data monitoring host 102 through the network interface, or the off-board system control host 101 stores the air tightness test detection data in a storage device through a USB interface, and the storage device is connected to the on-board data monitoring host 102; if unqualified, the vehicle leakage point location is analyzed based on the air tightness test detection data.

[0038] Furthermore, the process of the off-vehicle system control host 101 analyzing the location of the vehicle leakage point according to the air tightness test detection data includes the following steps:

[0039] Compare the air pressure values ​​of all the measuring points measured by the external air pressure detection device and the built-in air pressure detection device to determine the point to be measured corresponding to the lowest air pressure value of the measuring point;

[0040] Draw a wind direction curve according to the wind direction of the measuring point of the determined point to be measured;

[0041] The location of the leakage point is found according to the position of the air pressure detection device corresponding to the test point and the wind direction curve.

[0042] The air tightness monitoring part in the vehicle includes: the in-vehicle data monitoring host 102, which is the core equipment for air tightness data monitoring, analysis and early warning during vehicle operation. The in-vehicle data monitoring host 102 is connected to the in-vehicle passenger information host 303 through the network bus to collect the vehicle running speed required for air tightness attenuation analysis; the passenger information host 303 collects the vehicle external environment information (train running speed, altitude, temperature inside and outside the vehicle, etc.) by connecting to the on-board sensor, and provides the in-vehicle data monitoring host 102 with the train parameters required for air tightness attenuation analysis; the built-in air pressure detection device is connected to the in-vehicle data monitoring host 102 and the off-vehicle system control host 101 through the network bus and wires to collect the air pressure data of each point to be tested, and implement air pressure data monitoring of the points to be tested; the train control unit 302 controls the driver's console display screen and the mechanic's room display screen to display early warning information. The in-vehicle data monitoring host 102 can store the vehicle air tightness test data collected by the off-vehicle test control host 101 through external interfaces such as the network and USB as the starting data for air pressure data analysis during vehicle operation.

[0043] The in-vehicle data monitoring host 102 performs data analysis based on the train running speed and air tightness warning detection data, outputs the relationship curve between the air pressure value of the test point and the wind direction and the vehicle speed, and analyzes whether the vehicle air tightness loss has reached the critical value, that is, the initial value of the air tightness warning, based on the air pressure value. If the data analysis result reaches the initial value of the air tightness warning, the in-vehicle data monitoring host 102 predicts the location range of the vehicle leakage point through wind direction analysis, and uploads the train air tightness inspection warning signal to the train control unit 302 through the network bus.

[0044] The train control unit 302 is the train information processing center, which can send the received train airtightness maintenance warning signal to the driver's station and the mechanic's room, and control the driver's station display screen and the mechanic's room display screen to display warning information, such as "the train should undergo airtightness maintenance", thereby achieving an early warning effect on the attenuation of the train vehicle's airtightness.

[0045] A train air tightness test data analysis and early warning system provided by the present invention can reduce the danger during the test, and can also monitor the air tightness data of typical positions in the carriage, and analyze the air tightness attenuation data in combination with the train running speed, and issue early warnings for possible air tightness problems in the future, thereby ensuring the safety of train operation; providing detailed data support for train air tightness tests, while improving the efficiency of air tightness tests, reducing the time required for test personnel to find leaks, and reducing the danger of the test process; increasing the volume of sample data collection, increasing real-time monitoring of air tightness at typical positions, and issuing timely early warnings for air tightness attenuation, thereby reducing the risk of train operation.

[0046] The present invention further proposes a train air tightness test data analysis and early warning method based on the train air tightness test data analysis and early warning system of the above-mentioned embodiment, and the method specifically comprises the following steps:

[0047] 1. During the train air tightness test:

[0048] 1.1 Install the air tightness test part outside the vehicle and the air tightness monitoring part inside the vehicle, where the equipment fan 301 and the vehicle-outside system control host 101 are placed in a safe position outside the vehicle, and the power supply and data transmission cables are connected; each external air pressure detection device and the internal air pressure detection device are installed and fixed at their corresponding test points. After the installation is completed, all test personnel evacuate the vehicle to be tested, close all doors and air conditioning dampers, and the test operator docks the connector 209 after checking that everything is correct;

[0049] 1.2 Start the equipment fan 301 to fill air into the compartment and start the air tightness test;

[0050] 1.3 The off-vehicle system control host 101 determines whether the air tightness test result is qualified based on the air tightness test data analysis;

[0051] 1.3.1 If the air tightness test result is qualified, the in-vehicle data monitoring host 102 actively collects the air tightness test data of each air pressure detection device recorded by the out-vehicle system control host 101 as the initial value of the air tightness warning;

[0052] 1.3.2 If the air tightness test result is unqualified, the off-vehicle system control host 101 compares the air pressure values ​​of the measuring points measured by all the external air pressure detection devices and the built-in air pressure detection device, determines the test point corresponding to the lowest air pressure value of the measuring point, and then draws the wind direction curve according to the wind direction of the measuring point of the determined test point. Finally, the leakage point is found according to the position of the air pressure detection device corresponding to the test point and the wind direction curve. The test personnel will rectify the leakage point and repeat step 1.3.2 after the rectification is completed;

[0053] 1.4 After the air tightness test is completed, remove the air tightness test part outside the vehicle;

[0054] 2. During the train operation:

[0055] 2.1 During the train's running, the passenger information host 303 transmits the train's running speed to the in-vehicle data monitoring host 102;

[0056] 2.2 Each built-in air pressure detection device transmits the air tightness warning detection data of each test point to the in-vehicle data monitoring host 102 for the in-vehicle data monitoring host 102 to perform data analysis;

[0057] 2.3 The in-vehicle data monitoring host 102 performs data analysis based on the train running speed and air tightness warning detection data;

[0058] 2.3.1 If the data analysis result does not reach the initial value of the airtightness warning, the vehicle will not display the warning information;

[0059] 2.3.2 If the data analysis result reaches the initial value of the air tightness warning, the on-board data monitoring host 102 sends a train air tightness inspection warning signal to the train control unit 302. The train control unit 302 controls the driver's console display screen and the mechanic's room display screen to display the warning information. For example, the warning information is: "The train should undergo an air tightness inspection."

[0060] Compared with the train air tightness test method in the prior art, the present invention adds air pressure detection points at the vehicle openings. By collecting and analyzing the test data through the off-board system control host, the location area of ​​the vehicle air pressure leakage point can be quickly determined, avoiding the test personnel's high-risk and inefficient operations such as climbing on the roof of the vehicle to listen to the sound and entering the pressurized vehicle to listen to the sound in order to find the leakage point, thereby effectively improving the safety of the air tightness test and the efficiency of leak point detection.

[0061] Compared with the air tightness monitoring method in the prior art, the present invention fills the gap in air tightness monitoring of typical leakage points of vehicles. Through real-time monitoring of vehicle air tightness, the air tightness loss of vehicles at different speeds and under various extreme weather conditions can be effectively analyzed, providing effective data support for the subsequent vehicle sealant usage standards and glue application standards. At the same time, through the in-vehicle data monitoring host, the air tightness attenuation changes in the blind spots of mechanics and other personnel can be monitored, and effective warnings can be issued for vehicle air tightness attenuation and leakage point ranges, thereby improving vehicle operation safety.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A train air tightness test data analysis and early warning system, characterized in that: It includes an outside air tightness test part and an inside air tightness monitoring part, wherein the outside air tightness test part and the inside air tightness monitoring part are arranged on the train in advance before the air tightness test, and the outside air tightness test part is removed after the air tightness test is completed; The vehicle exterior air tightness test part comprises an exterior system control host (101), an equipment fan (301) and a plurality of external air pressure detection devices, wherein the exterior system control host (101) is connected to the equipment fan (301) via a network bus, and the exterior system control host (101) is also connected to each of the external air pressure detection devices via a network bus and wires, wherein each of the external air pressure detection devices is distributed at a side window to be tested point, an air conditioning unit to be tested point, a plug door to be tested point and a windshield to be tested point; The in-vehicle air tightness monitoring part comprises an in-vehicle data monitoring host (102), a train control unit (302), a passenger information host (303) and a plurality of built-in air pressure detection devices. The in-vehicle data monitoring host (102) is connected to the train control unit (302) and the passenger information host (303) respectively through a network bus. Each of the built-in air pressure detection devices is connected to the in-vehicle data monitoring host (102) and the off-vehicle system control host (101) respectively through a network bus and wires. The built-in air pressure detection device is connected to the external air pressure detection device through a connector (209). Each of the built-in air pressure detection devices is distributed at a test point of an air conditioning condensation outlet, a test point of a water supply and drainage pipe hole of a vehicle body, a test point of a wire hole under the vehicle, and a test point at a connection between a protective box and a vehicle body. When conducting a train air tightness test, the off-board system control host (101) controls the equipment fan (301) to provide a stable wind pressure for the train compartment, the external air pressure detection device and the internal air pressure detection device send air tightness test detection data to the off-board system control host (101), and the off-board system control host (101) analyzes and determines whether the air tightness test result is qualified based on the air tightness test detection data. If qualified, the air tightness test detection data is stored as the initial value of the air tightness warning of the on-board data monitoring host (102); If it fails, the location of the vehicle leakage point is analyzed according to the air tightness test detection data; After the external air tightness test part is removed, during the operation of the train, the passenger information host (303) transmits the train running speed to the internal data monitoring host (102), and the built-in air pressure detection device sends the air tightness warning detection data to the internal data monitoring host (102). The internal data monitoring host (102) performs data analysis based on the train running speed and the air tightness warning detection data. If the data analysis result reaches the initial value of the air tightness warning, the internal data monitoring host (102) sends a train air tightness inspection warning signal to the train control unit (302), and the train control unit (302) controls the driver's console display screen and the mechanic's room display screen to display the warning information.

2. A train air tightness test data analysis and early warning system according to claim 1, characterized in that: The air tightness test detection data includes the air pressure value of the measuring point and the wind direction of the measuring point at the point to be tested. The process of the off-vehicle system control host (101) analyzing the position of the vehicle leakage point according to the air tightness test detection data includes the following steps: Compare the air pressure values ​​of all the measuring points measured by the external air pressure detection device and the built-in air pressure detection device to determine the point to be measured corresponding to the lowest air pressure value of the measuring point; Draw a wind direction curve according to the wind direction of the measuring point of the determined point to be measured; The location of the leakage point is found according to the position of the air pressure detection device corresponding to the test point and the wind direction curve.

3. A train air tightness test data analysis and early warning system according to claim 1, characterized in that: The off-vehicle system control host (101) stores the airtightness test data in the on-vehicle data monitoring host (102) via a network interface, or the off-vehicle system control host (101) stores the airtightness test data in a storage device via a USB interface, and the storage device is connected to the on-vehicle data monitoring host (102).

4. The analysis and early warning method of the train air tightness test data analysis and early warning system according to any one of claims 1 to 3 is characterized in that: The following steps are involved:

1. During the train air tightness test: 1.1 Install the vehicle exterior air tightness test part and the vehicle interior air tightness monitoring part, wherein the equipment fan (301) and the vehicle exterior system control host (101) are placed in a safe position outside the vehicle, and each external air pressure detection device and the internal air pressure detection device are installed at their respective corresponding test points and fixed. After the installation is completed, close all vehicle doors and air conditioning dampers, and then dock the connector (209); 1.2 Start the equipment fan (301) to fill the compartment with air and start the air tightness test; 1.3 The off-vehicle system control host (101) determines whether the air tightness test result is qualified based on the air tightness test data analysis; 1.3.1 If the air tightness test result is qualified, the in-vehicle data monitoring host (102) actively collects the air tightness test data of each air pressure detection device recorded by the out-vehicle system control host (101) as the initial value of the air tightness warning; 1.3.2 If the air tightness test result is unqualified, the off-vehicle system control host (101) compares the air pressure values ​​of the measuring points measured by all the external air pressure detection devices and the internal air pressure detection device, determines the test point corresponding to the lowest air pressure value of the measuring point, and then draws a wind direction curve according to the wind direction of the measuring point of the determined test point, and finally finds the leakage point according to the position of the air pressure detection device corresponding to the test point and the wind direction curve; 1.4 After the air tightness test is completed, remove the air tightness test part outside the vehicle; 2. During the train operation: 2.1 The passenger information host (303) transmits the train running speed to the in-vehicle data monitoring host (102); 2.2 Each built-in air pressure detection device transmits the air tightness warning detection data of each test point to the in-vehicle data monitoring host (102); 2.3 The in-vehicle data monitoring host (102) performs data analysis based on the train running speed and air tightness warning detection data; 2.3.1 If the data analysis result does not reach the initial value of the airtightness warning, the vehicle will not display the warning information; 2.3.2 If the data analysis result reaches the initial value of the air tightness warning, the in-vehicle data monitoring host (102) sends a train air tightness inspection warning signal to the train control unit (302), and the train control unit (302) controls the driver's console display screen and the mechanic's room display screen to display the warning information.

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