A device and method for detecting air pressure of tail equipment

Abstract

The present invention relates to a device and method for detecting air pressure at the tail end of a train. The device comprises a controller, a sensor module, and a reference signal acquisition module. The sensor module is installed at the tail end of the train and connected to the controller. The sensor module is equipped with several pressure sensors in hot standby mode. These pressure sensors collect wind pressure data at the tail end of the train. When the wind pressure data at the tail end of the train are inconsistent, the controller controls the sensor module to switch to the reference signal acquisition module to collect a reference signal. The controller then sets the pressure sensor closest to the reference signal as the trusted sensor based on a preset reference signal value. Compared with existing technologies, the present invention has the advantages of high wind pressure detection reliability, simple structure, and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air pressure detection technology for tail-end equipment, and in particular to an air pressure detection device and a detection method for tail-end equipment. Background Art

[0002] Currently, most tail-end equipment still uses a single pressure sensor. If a pressure sensor fails during operation, the equipment cannot determine whether the pressure readings it collects are normal. The most direct solution to this problem is to create a redundant design by adding additional pressure sensors. There are two basic approaches to using redundant pressure sensors, each with its own challenges.

[0003] Method 1: Cold standby

[0004] This approach uses a single pressure sensor. If a primary pressure sensor is determined to be abnormal based on a specific detection pattern, the backup pressure sensor is activated. If the pressure value collected by the backup sensor deviates from the primary pressure sensor within a tolerance range, the primary sensor is used. If the difference is significant, the backup is deemed reliable and the system switches to the backup.

[0005] When there is a large deviation between the primary and backup sensors, the backup sensor is used because its operating time is much less than that of the primary sensor and the probability of damage is lower. However, the problem with this approach is that damage to the backup sensor can lead to false alarms.

[0006] Method 2: Hot standby

[0007] In hot standby mode, two sensors operate simultaneously. When the pressure value deviation is within the allowable range, the average is calculated. If the values ​​collected by the two pressure sensors deviate significantly, each pressure sensor compares its own historical values ​​to determine whether the change is abnormal. If the change trends are consistent, the primary and backup pressure sensors are considered to be operating normally. If the change trends are inconsistent, the value with the smaller change is used.

[0008] From the above control method, it can be determined whether there is an abnormality by comparing the two pressure sensors, but it is impossible to determine which pressure sensor is normal. The directly set trusted sensor is also very likely to be a faulty sensor. Summary of the Invention

[0009] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a high reliability, simple structure and low cost tail equipment air pressure detection device and detection method.

[0010] The purpose of the present invention can be achieved by the following technical solutions:

[0011] A device for detecting air pressure at the tail end of a train, the device comprising a controller, a sensor module and a reference signal acquisition module; the sensor module being installed at the tail end of the train; the sensor module being connected to the controller; the sensor module being provided with a plurality of pressure sensors in a hot standby working mode, the plurality of pressure sensors collecting a plurality of tail end wind pressure data; when the plurality of tail end wind pressure data are inconsistent, the controller controls the sensor module to switch to the reference signal acquisition module to collect a reference signal, and sets the pressure sensor closest to the reference signal as a trusted sensor according to a preset reference signal value.

[0012] Preferably, the detection device includes a tail air pressure chamber, a detection chamber and a reference signal detection chamber; the tail air pressure chamber is connected to the tail air duct, and the reference signal detection chamber is connected to the reference air pressure signal; the sensor module is arranged in the detection chamber.

[0013] More preferably, the column tail air pressure chamber and the detection chamber, the detection layer and the reference signal detection chamber are connected via a first solenoid valve and a second solenoid valve respectively; the first solenoid valve and the second solenoid valve are connected to a controller respectively.

[0014] More preferably, the controller controls the first solenoid valve to open and the second solenoid valve to close, and at this time the sensor module detects the pressure of the column tail air duct.

[0015] More preferably, the controller controls the first solenoid valve to close and the second solenoid valve to open, and at this time the sensor module collects reference signal data.

[0016] More preferably, the reference signal is atmospheric pressure; and the reference signal detection chamber is connected to the atmosphere.

[0017] More preferably, the controller is externally connected to a positioning device for acquiring altitude data; and the controller calculates atmospheric pressure data at the current altitude based on the altitude data.

[0018] More preferably, the atmospheric pressure data is calculated as follows:

[0019]

[0020] Among them, P0 is the standard atmospheric pressure; A is the altitude.

[0021] Preferably, the sensor module includes two pressure sensors, each of which is arranged in the detection chamber.

[0022] A method for detecting air pressure of tail equipment used in the above-mentioned tail equipment air pressure detection device, the air pressure detection method comprising:

[0023] Step 1: The controller obtains the wind pressure data collected by the sensor module in real time;

[0024] Step 2: Determine whether the wind pressure data collected by each sensor are consistent. If they are consistent, return to step 1; otherwise, go to step 3.

[0025] Step 3: The controller closes the first solenoid valve and opens the second solenoid valve at the same time, and the sensor module collects reference signal data;

[0026] Step 4: Determine whether each sensor is faulty based on the standard reference signal data preset in the controller, and set the sensor with the smallest difference from the standard reference signal data as the trusted sensor;

[0027] Step 5: Store the fault information of the sensor and issue a fault alarm.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. High reliability of wind pressure detection: When the data collected by each sensor are inconsistent, the air pressure detection device and detection method of the tail equipment in the present invention use a reference signal to determine whether the sensor is faulty, and set the sensor with the smallest difference with the reference information as the trusted sensor. This makes the fault judgment more accurate and truly brings into play the hot standby redundancy capability of the sensor.

[0030] 2. Simple structure and low cost: The air pressure detection device for the tail equipment in the present invention only needs to add a detection chamber and at least two pressure sensors to achieve high redundancy of the air pressure detection of the tail equipment, with low cost and simple implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the air pressure detection device for the tail equipment of a train under normal working conditions according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic structural diagram of the air pressure detection device for the tail equipment in the exhaust state according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic structural diagram of the air pressure detection device for the tail equipment in an embodiment of the present invention when collecting a reference signal.

[0034] The numbers in the figure show:

[0035] 1. Sensor module, 2. Air pressure chamber at the end of the train, 3. Detection chamber, 4. Reference signal detection chamber, 5. First solenoid valve, 6. Second solenoid valve. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0037] A device for detecting air pressure at the tail end of a train. The device comprises a controller, a sensor module 1 and a reference signal acquisition module. The sensor module 1 is installed at the tail end of the train. The sensor module 1 is connected to the controller. The sensor module 1 is provided with a plurality of pressure sensors in a hot standby working mode. The plurality of pressure sensors collect a plurality of tail end wind pressure data. When the plurality of tail end wind pressure data are inconsistent, the controller controls the sensor module 1 to switch to the reference signal acquisition module to collect the reference signal, and sets the pressure sensor closest to the reference signal as the trusted sensor according to the preset reference signal value.

[0038] The detection device includes a train tail air pressure chamber 2, a detection chamber 3 and a reference signal detection chamber 4. The train tail air pressure chamber 2 is connected to the train tail air duct, the reference signal detection chamber 4 is connected to the reference air pressure signal, and the sensor module 1 is set in the detection chamber 3.

[0039] The column tail air pressure chamber 2 and the detection chamber 3, the detection layer 3 and the reference signal detection chamber 4 are connected respectively through the first solenoid valve 5 and the second solenoid valve 6, and the first solenoid valve 5 and the second solenoid valve 6 are respectively connected to the controller.

[0040] The controller controls the first solenoid valve 5 to open and the second solenoid valve 6 to close. At this time, the sensor module 1 detects the pressure of the column tail air duct.

[0041] The controller controls the first solenoid valve 5 to close and the second solenoid valve 6 to open. At this time, the sensor module 1 collects reference signal data.

[0042] The reference signal in this embodiment is atmospheric pressure, and the reference signal detection chamber 4 is connected to the atmosphere. Figure 1 shown.

[0043] The controller is connected to a positioning device for obtaining altitude data, and the controller calculates the atmospheric pressure data at the current altitude based on the altitude data.

[0044] The calculation method of atmospheric pressure data is:

[0045]

[0046] Among them, P0 is the standard atmospheric pressure and A is the altitude.

[0047] The sensor module 1 in this embodiment includes two pressure sensors, which are respectively arranged in the detection chamber 3 .

[0048] The working principle of the air pressure detection device of the tail equipment in this embodiment is as follows:

[0049] During normal operation, Figure 1 As shown, the first solenoid valve 5 is opened, the detection chamber 3 is connected to the column tail air pressure chamber 2, and the pressure detected by the pressure sensor is the column tail air duct pressure. Figure 2 As shown, when exhausting, the first solenoid valve 5 and the second solenoid valve 6 are opened at the same time, and the air pressure in the air duct can be exhausted to the atmosphere. Figure 3 As shown, when the wind pressures detected by the two pressure sensors differ, the first solenoid valve 5 is closed and the second solenoid valve 6 is opened. This connects the detection chamber 3 with the reference signal detection chamber 4 (i.e., the atmospheric pressure chamber), and the collected pressure becomes the atmospheric pressure. At this point, the outputs of the two pressure sensors can be observed. The one closer to atmospheric pressure is considered normal and should continue to be used. Certain alarms are also issued to notify the user to replace the pressure sensor.

[0050] This embodiment also relates to a method for detecting air pressure of tail equipment used in the above-mentioned tail equipment air pressure detection device, the air pressure detection method comprising:

[0051] Step 1: The controller obtains the wind pressure data collected by the sensor module in real time.

[0052] Step 2: Determine whether the wind pressure data collected by each sensor are consistent. If they are consistent, return to step 1. Otherwise, go to step 3.

[0053] Step 3: The controller closes the first solenoid valve and opens the second solenoid valve at the same time. The sensor module collects reference signal data.

[0054] Step 4: Based on the standard reference signal data preset in the controller, determine whether each sensor is faulty, and set the sensor with the smallest difference from the standard reference signal data as the trusted sensor.

[0055] Step 5: Store the fault information of the sensor and issue a fault alarm.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A device for detecting air pressure of tail equipment, characterized in that: The detection device comprises a controller, a sensor module (1) and a reference signal acquisition module; the sensor module (1) is installed at the rear equipment; the sensor module (1) is connected to the controller; the sensor module (1) is provided with a plurality of pressure sensors in a hot standby working mode, the plurality of pressure sensors collect a plurality of rear wind pressure data; when the plurality of rear wind pressure data are inconsistent, the controller controls the sensor module (1) to switch to the reference signal acquisition module to collect the reference signal, and sets the pressure sensor closest to the reference signal as the trusted sensor according to a preset reference signal value.

2. The air pressure detection device for tail equipment according to claim 1, characterized in that: The detection device comprises a train tail air pressure chamber (2), a detection chamber (3) and a reference signal detection chamber (4); the train tail air pressure chamber (2) is connected to the train tail air duct, and the reference signal detection chamber (4) is connected to the reference air pressure signal; the sensor module (1) is arranged in the detection chamber (3).

3. The air pressure detection device for tail equipment according to claim 2, characterized in that: The column tail air pressure chamber (2) and the detection chamber (3), and the detection layer (3) and the reference signal detection chamber (4) are respectively connected via a first solenoid valve (5) and a second solenoid valve (6); the first solenoid valve (5) and the second solenoid valve (6) are respectively connected to a controller.

4. The air pressure detection device for tail equipment according to claim 3, characterized in that: The controller controls the first solenoid valve (5) to open and the second solenoid valve (6) to close, and at this time the sensor module (1) detects the pressure of the column tail air duct.

5. The air pressure detection device for tail equipment according to claim 3, characterized in that: The controller controls the first solenoid valve (5) to close and the second solenoid valve (6) to open, and at this time the sensor module (1) collects reference signal data.

6. The air pressure detection device for tail equipment according to claim 2, characterized in that: The reference signal is atmospheric pressure; the reference signal detection chamber (4) is connected to the atmosphere.

7. The air pressure detection device for tail equipment according to claim 5, characterized in that: The controller is externally connected to a positioning device for acquiring altitude data; the controller calculates atmospheric pressure data at the current altitude based on the altitude data.

8. The air pressure detection device for tail equipment according to claim 7, characterized in that: The calculation method of the atmospheric pressure data is: Among them, P0 is the standard atmospheric pressure; A is the altitude.

9. The air pressure detection device for tail equipment according to claim 1, characterized in that: The sensor module (1) comprises two pressure sensors, which are respectively arranged in the detection chamber (3).

10. A method for detecting air pressure of tail equipment used in the tail equipment air pressure detection device according to claim 1, characterized in that: The air pressure detection method comprises: Step 1: The controller obtains the wind pressure data collected by the sensor module in real time; Step 2: Determine whether the wind pressure data collected by each sensor are consistent. If they are consistent, return to step 1; otherwise, go to step 3. Step 3: The controller closes the first solenoid valve and opens the second solenoid valve at the same time, and the sensor module collects reference signal data; Step 4: Determine whether each sensor is faulty based on the standard reference signal data preset in the controller, and set the sensor with the smallest difference from the standard reference signal data as the trusted sensor; Step 5: Store the fault information of the sensor and issue a fault alarm.

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