A fresh air temperature sensor fault detection method and device

Abstract

The application provides a fresh air temperature sensor fault detection method and device applied to a railway vehicle, the railway vehicle comprising a plurality of fresh air temperature sensors, the method comprising: determining a working mode of the railway vehicle; obtaining a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors; and determining whether the target sensor is faulty according to the working mode, the measurement value and the measurement average value. The application solves the problem of low accuracy of fresh air temperature sensor fault detection caused by different working modes of the vehicle, and realizes an accurate fresh air temperature sensor fault detection method.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, and more particularly, to a fresh air temperature sensor fault detection method and device. BACKGROUND

[0002] Currently, in the air conditioning control system of a rail vehicle, the fault detection of a fresh air temperature sensor is very critical. In related technologies, whether a temperature sensor is faulty is determined by comparing the difference between an actually measured temperature of the temperature sensor and the average value of the temperature sensor with a preset value. However, the different working modes of the rail vehicle itself can cause temperature differences of the fresh air temperature sensor, which results in low accuracy of the fault detection of the fresh air temperature sensor and false positives or false negatives.

[0003] No effective solution has been proposed to solve the problem of low accuracy of the fault detection of the fresh air temperature sensor. SUMMARY

[0004] Therefore, it is necessary to provide a fresh air temperature sensor fault detection method and device to solve the above technical problems.

[0005] In a first aspect, a fresh air temperature sensor fault detection method is provided, which is applied to a rail vehicle including a plurality of fresh air temperature sensors. The method includes:

[0006] determining a working mode of the rail vehicle;

[0007] obtaining a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors;

[0008] determining whether the target sensor is faulty according to the working mode, the measurement value, and the measurement average value.

[0009] In an embodiment, the determination of the working mode of the rail vehicle includes:

[0010] when the running speed is greater than or equal to a preset speed, determining that the rail vehicle is in a running mode;

[0011] when the running speed is less than the preset speed, determining that the rail vehicle is in a stop mode.

[0012] In an embodiment, the determination of whether the target sensor is faulty according to the working mode, the measurement value, and the measurement average value includes:

[0013] determining whether the absolute value of the difference between the measured value and the measured average value is greater than or equal to a first temperature deviation preset value when the rail vehicle is in the running mode, and whether the duration that the absolute value of the difference between the measured value and the measured average value is greater than or equal to the first temperature deviation preset value is greater than or equal to a first preset time length;

[0014] If yes, it is determined that the target sensor is faulty.

[0015] In an embodiment, the determining whether the target sensor is faulty according to the working mode, the measured value and the measured average value comprises:

[0016] determining whether the measured value is greater than or equal to a preset upper temperature limit value when the rail vehicle is in the parking mode, and whether the duration that the measured value is greater than or equal to the preset upper temperature limit value is greater than or equal to a third preset time length;

[0017] If yes, it is determined that the target sensor is faulty.

[0018] In an embodiment, the determining whether the target sensor is faulty according to the working mode, the measured value and the measured average value comprises:

[0019] determining whether the measured value is greater than or equal to a preset upper temperature limit value when the rail vehicle is in the parking mode, and whether the duration that the measured value is greater than or equal to the preset upper temperature limit value is greater than or equal to a third preset time length;

[0020] If yes, it is determined that the target sensor is faulty.

[0021] In an embodiment, the determining whether the target sensor is faulty according to the working mode, the measured value and the measured average value comprises:

[0022] determining whether the measured value is less than or equal to a preset lower temperature limit value when the rail vehicle is in the parking mode, and whether the duration that the measured value is less than or equal to the preset lower temperature limit value is greater than or equal to a fourth preset time length;

[0023] If yes, it is determined that the target sensor is faulty.

[0024] In an embodiment, after determining that the target sensor is faulty, the method further comprises:

[0025] generating target sensor fault information and sending the target sensor fault information to a background system for alarm.

[0026] In an embodiment, the fresh air temperature sensor fault detection method comprises:

[0027] Step S801, obtaining a running speed of the rail vehicle;

[0028] Step S802, when the running speed is greater than or equal to a preset speed, determining that the rail vehicle is in a running mode, and executing step S803; when the running speed is less than the preset speed, determining that the rail vehicle is in a stopping mode, and executing step S804;

[0029] Step S803, obtaining a measurement value of the target sensor and a measurement average value of the plurality of fresh air temperature sensors; determining whether an absolute value of a difference between the measurement value and the measurement average value is greater than or equal to a first temperature deviation preset value, and whether a duration for which the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the first temperature deviation preset value is greater than or equal to a first preset time length; if yes, determining that the target sensor is faulty;

[0030] Step S804, obtaining a measurement value of the target sensor and a measurement average value of the plurality of fresh air temperature sensors; determining whether an absolute value of a difference between the measurement value and the measurement average value is greater than or equal to a second temperature deviation preset value, and whether a duration for which the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the second temperature deviation preset value is greater than or equal to a second preset time length; if yes, determining that the target sensor is faulty, and if no, executing step S805;

[0031] Step S805, determining whether the measurement value is greater than or equal to a preset upper temperature limit value, and whether a duration for which the measurement value is greater than or equal to the preset upper temperature limit value is greater than or equal to a third preset time length; if yes, determining that the target sensor is faulty, and if no, executing step S806;

[0032] Step S806, determining whether the measurement value is less than or equal to a preset lower temperature limit value, and whether a duration for which the measurement value is less than or equal to the preset lower temperature limit value is greater than or equal to a fourth preset time length; if yes, determining that the target sensor is faulty.

[0033] In an embodiment, the first temperature deviation preset value is set to 3-8℃, the first preset time length is set to 15-300s; the second temperature deviation preset value is set to 10-15℃, the second preset time length is set to 15-300s; the preset upper temperature limit value is set to 60℃, the third preset time length is set to 3-30s; the preset lower temperature limit value is set to -40℃, and the fourth preset time length is set to 3-30s;

[0034] The first temperature deviation preset value is less than the second temperature deviation preset value;

[0035] The third preset time length is less than the second preset time length; and the fourth preset time length is less than the second preset time length.

[0036] In a second aspect, an embodiment of the present application provides a fresh air temperature sensor fault detection device, the device comprising:

[0037] a mode determination module configured to determine a working mode of the rail vehicle;

[0038] a temperature acquisition module configured to acquire a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors;

[0039] a fault detection module configured to determine whether the target sensor is faulty according to the working mode, the measurement value and the measurement average value.

[0040] Compared with the prior art, the above-mentioned fresh air temperature sensor fault detection method and device are applied to a rail vehicle comprising a plurality of fresh air temperature sensors, the method comprising: determining a working mode of the rail vehicle; acquiring a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors; and determining whether the target sensor is faulty according to the working mode, the measurement value and the measurement average value, thereby solving the problem of low accuracy of fresh air temperature sensor fault detection caused by different working modes of the vehicle and realizing an accurate fresh air temperature sensor fault detection method. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application in any way. In the drawings:

[0042] Figure 1 is a terminal hardware structure block diagram of a fresh air temperature sensor fault detection method in an embodiment of the present application;

[0043] Figure 2 is a flowchart of a fresh air temperature sensor fault detection method in an embodiment of the present application;

[0044] Figure 3 is a flowchart of determining a working mode of a rail vehicle in an embodiment of the present application;

[0045] Figure 4 is a flowchart of a fresh air temperature sensor fault detection method in an embodiment of the present application;

[0046] Figure 5 is a flowchart of a fresh air temperature sensor fault detection method in an embodiment of the present application;

[0047] Figure 6 is a flow chart of a fresh air temperature sensor fault detection method in one embodiment of the present application;

[0048] Figure 7 is a flow chart of a fresh air temperature sensor fault detection method in one embodiment of the present application;

[0049] Figure 8 is a flow chart of a fresh air temperature sensor fault detection method in one preferred embodiment of the present application;

[0050] Figure 9 is a flow chart of a fresh air temperature sensor fault detection method in one embodiment of the present application;

[0051] Figure 10 is a structural schematic diagram of a fresh air temperature sensor fault detection device in one embodiment of the present application;

[0052] Figure 11 is a structural schematic diagram of a fresh air temperature sensor fault detection device in one embodiment of the present application; DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is described and explained below in connection with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, some design, manufacture or production changes made on the basis of the technical content disclosed in the present application are only routine technical means for those of ordinary skill in the art related to the content disclosed in the present application, and should not be understood as insufficient disclosure of the present application.

[0054] In the present application, "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict

[0055] Unless otherwise defined, technical terms and scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms "a", "an", "one", "this", and similar referents in the context of describing the application are to be construed to be inclusive, rather than exclusive. The terms "including", "containing", "having", and "comprising" and variations thereof in the present application are meant to encompass the items listed thereafter, and equivalents thereof, as well as additional items. The terms "connected", "coupled", and "pathway" are not restricted to direct or physical connections, but can include indirect connections, unless otherwise specifically stated. The term "plurality" means two or more. The term "and / or" describes association between or among multiple components such as A and / or B, and can mean A alone, B alone, or A and B together. The terms "first", "second", "third", and the like, merely denote different instances of the object and do not require a specific order or sequence.

[0056] The method embodiments provided by the present embodiment can be executed in a terminal, a computer, or a similar computing device. Taking the case of running on a terminal, Figure 1 is a hardware structure block diagram of a terminal for a fresh air temperature sensor fault detection method in an embodiment of the present application. As shown in Figure 1 , the terminal can include one or more (only one is shown in Figure 1 ) processors 102 (the processor 102 can include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above terminal can also include a transmission device 106 for communication function and an input / output device 108. Those skilled in the art can understand that Figure 1 The structure shown is only schematic, and it does not limit the structure of the above terminal. For example, the terminal can also include more or fewer components than those shown in Figure 1 , or have a different configuration from that shown in Figure 1 .

[0057] The memory 104 can be used to store computer programs, such as software programs of application software and modules, for example, a computer program corresponding to the fresh air temperature sensor fault detection method in the embodiments of the present application. The processor 102 performs various functional applications and data processing, that is, implements the above method, by running the computer program stored in the memory 104. The memory 104 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include a memory remotely arranged with respect to the processor 102, which can be connected to the terminal through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0058] The transmission device 106 is used to receive or send data via a network. Specific examples of the above network can include a wireless network provided by a communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (NIC), which can be connected to other network devices through a base station so as to be able to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet in a wireless manner.

[0059] The embodiments of the present application provide a fresh air temperature sensor fault detection method, which is applied to a rail vehicle, and the rail vehicle includes a plurality of fresh air temperature sensors, Figure 2 is a flowchart of the fresh air temperature sensor fault detection method in one embodiment of the present application, and as Figure 2 shown, the method includes the following steps:

[0060] Step S220, determining a working mode of the rail vehicle;

[0061] In which, determining the working mode of the rail vehicle refers to determining the rail vehicle as a driving mode or a stopping mode according to different driving speeds V 车 of the rail vehicle through a preset speed V.

[0062] It should be noted that the working mode of the rail vehicle can not be limited to the above two modes, and in the actual detection process, different modes can be divided according to the specific performance of the rail vehicle and the detection requirements, and different preset speeds V are set correspondingly.

[0063] In one embodiment, the preset speed V can be 10-30 km / h, and the specific size of the vehicle speed judgment value is not limited in the present application.

[0064] Step S240, obtaining the measurement value Te of the target sensor 测 and the measurement average value Te of the plurality of fresh air temperature sensors 均 Wherein, the target sensor is any one of the plurality of fresh air temperature sensors, that is, each fresh air temperature sensor can be detected for failure by the fresh air temperature sensor failure detection method;

[0065] A plurality of fresh air temperature sensors are arranged in the rail vehicle, and the specific positions of the fresh air temperature sensors can be the air return position of the air conditioning system, the middle section of the car, the connection between the cars, and the like. The specific position and number of the fresh air temperature sensors are not limited by the present application. The target sensor can be any one of the plurality of fresh air temperature sensors, and the measurement value Te of the target sensor is read 测 .

[0066] Wherein, the measurement average value Te of the plurality of fresh air temperature sensors is calculated 均 , which can be obtained by reading the measurement values of the plurality of fresh air temperature sensors in a single car and taking the average value; or by reading the measurement values of the plurality of fresh air temperature sensors in the entire train and taking the average value. The present application does not limit the acquisition and calculation method of the measurement average value Te of the plurality of fresh air temperature sensors 均 .

[0067] It can be understood that the measurement average value Te of the plurality of fresh air temperature sensors 均 is determined here, in order to subsequently determine whether the measurement value Te of the target sensor 测 deviates significantly from the measurement average value Te 均 . Based on this concept, in specific implementation, the measurement average value Te 均 here can also be replaced by a value such as a root mean square for representing the average level of the temperature values detected by each fresh air temperature sensor, and the corresponding technical solutions can also achieve the purpose of the present application and should fall within the protection scope of the present application.

[0068] Step S260, determining whether the target sensor is faulty according to the working mode, the measurement value and the measurement average value.

[0069] Since there is a difference in the measurement of the fresh air temperature sensor in the driving mode or the parking mode of the vehicle, as in the present embodiment, the vehicle is in the tunnel in the driving mode and in the station warehouse in the parking mode, due to the difference in the specific structure and ventilation design between the tunnel and the station warehouse, which will cause the difference in the measurement of the fresh air temperature sensor in the rail vehicle, therefore, in the present embodiment, the first temperature deviation preset value T1 and the first preset time t1 are set corresponding to the driving mode of the vehicle; the second temperature deviation preset value T2 and the second preset time t2 are set corresponding to the parking mode of the vehicle, so as to correspond to the influence of different working modes on the fresh air temperature sensor.

[0070] Preferably, the first temperature deviation preset value T1 corresponding to the driving mode of the vehicle can be less than the second temperature deviation preset value T2 corresponding to the parking mode of the vehicle, so as to more accurately detect the fault of the fresh air temperature sensor in the driving mode.

[0071] After determining the working mode of the vehicle, the measurement value Te 测 of the target sensor and the measurement average value Te 均 of the plurality of fresh air temperature sensors are obtained 测 The difference between the measurement value Te 均 and the measurement average value Te 测 is compared with the temperature deviation preset value corresponding to the working mode of the vehicle, and the duration of the difference between the measurement value Te 均 and the measurement average value Te 测 is compared with the preset time corresponding to the working mode of the vehicle, so as to determine whether the target sensor is faulty.

[0072] Preferably, in one process of the fresh air temperature sensor fault detection method, both single target sensor fault detection and multiple target sensor fault detection can be performed, and the multiple target sensor fault detection can be performed sequentially or simultaneously.

[0073] In one embodiment, the fresh air temperature sensor fault detection method can set a detection frequency, and according to the detection frequency, the steps in the fresh air temperature sensor fault detection method are executed every preset time.

[0074] For example, when the detection frequency is once every 30 seconds, i.e., every 30 seconds, the working mode of the rail vehicle is determined and / or the measurement value Te 测 of the target sensor and the measurement average value Te 均 of the plurality of fresh air temperature sensors are obtained 测 and / or according to the working mode, the measurement value Te 均, to determine whether the target sensor is faulty. Different detection frequencies can be set for different steps in the fresh air temperature sensor fault detection method, and the detection frequencies can be other different time dimensions, including at least one of seconds, minutes, hours, days, weeks, months, and years.

[0075] In one embodiment, the fresh air temperature sensor fault detection method can be real-time dynamic detection, that is, the running speed of the rail vehicle and / or the measurement value Te 测 of the target sensor are detected in real time. 均 Once the change occurs, the fresh air temperature sensor fault detection method is performed to determine whether the target sensor is faulty, or the running speed V 车 of the rail vehicle and / or the measurement value Te 测 of the target sensor are continuously detected. 均 The fault detection of the fresh air temperature sensor is determined at the moment.

[0076] The steps S220 to S260 described above, by determining the working mode of the rail vehicle, obtaining the measurement value of the target sensor and the measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors, according to the working mode, the measurement value and the measurement average value, determining whether the target sensor is faulty, solve the problem that different working modes of the vehicle cause low accuracy of fresh air temperature sensor fault detection, and realize an accurate fresh air temperature sensor fault detection method.

[0077] In one embodiment, the working mode of the rail vehicle is determined, as shown in Figure 3 , specifically comprising the following steps:

[0078] Step S201, obtaining the running speed V 车 of the rail vehicle.

[0079] Step S202, when the running speed V 车 is greater than or equal to the preset speed V, it is determined that the rail vehicle is in a running mode; when the running speed V 车 is less than the preset speed V, it is determined that the rail vehicle is in a stop mode.

[0080] By obtaining the running speed of the rail vehicle, the running speed is compared with the preset speed, when the running speed is greater than or equal to the preset speed, it is determined that the rail vehicle is in a running mode; when the running speed is less than the preset speed, it is determined that the rail vehicle is in a stop mode, which can realize the judgment of the working mode of the rail vehicle, and facilitate the subsequent judgment of whether the target sensor is faulty in combination with the working mode of the rail vehicle.

[0081] In one embodiment, whether the target sensor is faulty is determined based on the operating mode, the measured value, and the average measurement value, such as... Figure 4 As shown, the specific steps include the following:

[0082] When the rail vehicle is in driving mode, determine the measured value Te. 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 |Is it greater than or equal to the first temperature deviation preset value T1, and is the absolute value of the difference between the measured value and the average measured value|Te 测 -Te 均 The duration t of the temperature deviation being greater than or equal to the first preset value T1 a Whether it is greater than or equal to the first preset time t1; that is, the fault judgment condition of the target sensor is:

[0083] |Te 测 -Te 均 |≥T1 and t a ≥t1

[0084] If so, then the target sensor is confirmed to be faulty.

[0085] Preferably, the first temperature deviation preset value T1 can be set to 3-8℃, and the first preset duration t1 can be set to 15-300s. The above-mentioned first temperature deviation preset value T1 and first preset duration t1 can be adjusted according to the actual operating conditions, and the present invention does not limit the specific values.

[0086] By determining whether the absolute value of the difference between the measured value and the average value is greater than or equal to a first preset temperature deviation value, and whether the duration for which the absolute value of the difference between the measured value and the average value is greater than or equal to the first preset temperature deviation value is greater than or equal to a first preset duration, the detection of target sensor faults in driving mode is achieved.

[0087] In one embodiment, whether the target sensor is faulty is determined based on the operating mode, the measured value, and the average measurement value, such as... Figure 5 As shown, the specific steps include the following:

[0088] When the rail vehicle is in parking mode, determine the measured value Te. 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 |Is it greater than or equal to the second temperature deviation preset value T2, and is the absolute value of the difference between the measured value and the average measured value|Te 测 -Te 均 The duration t of the second temperature deviation preset value T2 being greater than or equal to the second temperature deviation preset value bWhether it is greater than or equal to the second preset duration t2; that is, the fault judgment condition of the target sensor is:

[0089] |Te 测 -Te 均 |≥T2 and t b ≥t2

[0090] If so, then the target sensor is confirmed to be faulty.

[0091] Preferably, the first preset temperature deviation value T1 can be less than the second preset temperature deviation value T2. The second preset temperature deviation value T2 can be set to 10-15°C, and the second preset duration t2 can be set to 15-300s. The second preset duration t2 can be the same as or different from the first preset duration t1. The above-mentioned second preset temperature deviation value T2 and second preset duration t2 can be adjusted according to the actual operating conditions. The present invention does not limit the specific values.

[0092] By determining whether the absolute value of the difference between the measured value and the average value is greater than or equal to a second preset temperature deviation value, and whether the duration for which the absolute value of the difference between the measured value and the average value is greater than or equal to the second preset temperature deviation value is greater than or equal to a second preset duration, the detection of target sensor faults in docking mode is achieved.

[0093] In one embodiment, whether the target sensor is faulty is determined based on the operating mode, the measured value, and the average measurement value, such as... Figure 6 As shown, the specific steps include the following:

[0094] When the rail vehicle is in parking mode, determine the measured value Te. 测 Is it greater than or equal to the preset upper temperature limit value T? max And the measured value Te 测 Greater than or equal to the preset upper temperature limit T max Duration t c Whether it is greater than or equal to the third preset duration t3; that is, the fault judgment condition of the target sensor is:

[0095] Te 测 ≥T max And t c ≥t3

[0096] If so, then the target sensor is confirmed to be faulty.

[0097] It should be noted that when the target sensor experiences faults such as loose wiring or poor contact, the measured value Te of the target sensor will be affected. 测 Measurement anomalies may occur, causing the measured value to deviate from the temperature measurement range. The preset upper temperature limit T... maxThis is a preset upper limit judgment value when an anomaly occurs in the measurement. In order to more accurately determine whether the target sensor is faulty, it is also necessary to determine the measured value Te. 测 Greater than or equal to the preset upper temperature limit T max Duration t c Does it exceed the third preset duration t3?

[0098] Preferably, the preset upper temperature limit value T max The temperature can be set to 60℃. The value of the third preset duration t3 can be less than the value of the second preset duration t2. Specifically, it can be set to 3–30 seconds, preferably 5 seconds. The above-mentioned upper limit value of the preset temperature T max The third preset duration t3 can be adjusted according to the actual operating conditions. This invention does not limit the specific value.

[0099] By determining whether the measured value is greater than or equal to the preset upper temperature limit, and whether the duration for which the measured value is greater than or equal to the preset upper temperature limit is greater than or equal to the third preset duration, the fault of the target sensor can be determined when problems such as loose wiring or poor contact occur in the target sensor during docking mode.

[0100] In one embodiment, whether the target sensor is faulty is determined based on the operating mode, the measured value, and the average measurement value, such as... Figure 7 As shown, the specific steps include the following:

[0101] When the rail vehicle is in parking mode, determine the measured value Te. 测 Is it less than or equal to the preset lower limit value T? min And the measured value Te 测 Less than or equal to the preset lower limit value T min Duration t d Whether it is greater than or equal to the fourth preset duration t4; that is, the fault judgment condition of the target sensor is:

[0102] Te 测 ≤T min And t d ≥t4

[0103] If so, then the target sensor is confirmed to be faulty.

[0104] It should be noted that when the target sensor experiences faults such as loose wiring or poor contact, the measured value Te of the target sensor will be affected. 测 Measurement anomalies may occur, causing the measured value to deviate from the temperature measurement range. The preset lower limit value T... min This is a preset lower limit judgment value when an abnormality occurs in the measurement. In order to more accurately determine whether the target sensor is faulty, it is also necessary to determine the measured value Te. 测 Less than or equal to the preset lower limit value T min Duration td Does it exceed the fourth preset duration t4?

[0105] Preferably, the preset lower limit value T min The temperature can be set to -40℃. The value of the fourth preset duration t4 can be less than the value of the second preset duration t2, and can be set to 3 to 30 seconds, preferably 5 seconds. The value of the fourth preset duration t4 can be the same as or different from the value of the third preset duration t3. The above-mentioned preset lower temperature limit value T min The fourth preset duration t4 can be adjusted according to the actual operating conditions. This invention does not limit the specific value.

[0106] By determining whether the measured value is less than or equal to the preset lower limit of temperature, and whether the duration of the measured value being less than or equal to the preset lower limit of temperature is greater than or equal to the fourth preset duration, the fault of the target sensor can be determined when problems such as loose wiring or poor contact occur in the target sensor during docking mode.

[0107] The embodiments of this application will be described in detail below with reference to practical application scenarios. Figure 8 This is a flowchart of a fresh air temperature sensor fault detection method according to a preferred embodiment of this application, as follows: Figure 8 As shown, the process includes the following steps:

[0108] Step S801: Obtain the travel speed V of the rail vehicle. 车 .

[0109] Step S802, when the driving speed V 车 When the speed is greater than or equal to the preset speed V, the rail vehicle is determined to be in driving mode, and step S803 is executed; when the driving speed V 车 When the speed is less than the preset speed V, the rail vehicle is determined to be in parking mode, and step S804 is executed.

[0110] Step S803: Obtain the measurement value Te from the target sensor. 测 And the average value Te of multiple fresh air temperature sensors 均 .

[0111] Determine the measured value Te 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 Is the measured value Te greater than or equal to the first preset temperature deviation value T1? 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 The duration t of the temperature deviation being greater than or equal to the first preset value T1 aIs it greater than or equal to the first preset duration t1? If so, then the target sensor is determined to be faulty.

[0112] Step S804: Obtain the measurement value Te from the target sensor. 测 And the average value Te of multiple fresh air temperature sensors 均 .

[0113] Determine the measured value Te 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 Is the measured value Te greater than or equal to the second temperature deviation preset value T2? 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 The duration t of the second temperature deviation preset value T2 being greater than or equal to the second temperature deviation preset value b Is it greater than or equal to the second preset duration t2? If yes, then the target sensor is determined to be faulty; otherwise, proceed to step S805.

[0114] Step S805, determine the measured value Te 测 Is it greater than or equal to the preset upper temperature limit value T? max And the measured value Te 测 Greater than or equal to the preset upper temperature limit T max Duration t c Is it greater than or equal to the third preset duration t3? If yes, then the target sensor is determined to be faulty; otherwise, proceed to step S806.

[0115] Step S806, determine the measured value Te 测 Is it less than or equal to the preset lower limit value T? min And the measured value Te 测 Less than or equal to the preset lower limit value T min Duration t d Is it greater than or equal to the fourth preset duration t4? If so, then the target sensor is determined to be faulty.

[0116] In the above preferred embodiment, the first preset temperature deviation value T1 is set to 3-8℃, and the first preset duration t1 is set to 15-300s; the second preset temperature deviation value T2 is set to 10-15℃, and the second preset duration t2 is set to 15-300s; the preset upper limit temperature value T... max The temperature is set to 60℃, and the third preset duration t3 is set to 3–30 seconds, preferably 5 seconds; the preset lower limit value T min The temperature is set to -40℃, and the fourth preset duration t4 is set to 3-30 seconds, preferably 5 seconds.

[0117] The first temperature deviation preset value T1 is less than the second temperature deviation preset value T2, the third preset time length t3 is less than the second preset time length t2, and the fourth preset time length t4 is less than the second preset time length t2. According to the different working modes of the rail vehicle, the temperature deviation preset value and the size of the preset time length are limited, so that the target sensor can be more accurately judged for failure.

[0118] It should be noted that the steps shown in the above flow or the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0119] In one embodiment, the new air temperature sensor fault detection method, as shown in Figure 9 , further comprises the following steps:

[0120] Step S280, generating target sensor fault information and sending it to the background system for alarm.

[0121] Among them, according to the different working modes and different fault judgment conditions of the rail vehicle, different target sensor fault information is generated.

[0122] In one embodiment, when the rail vehicle is in the driving mode, the target sensor fault information can include the model, position, measured value Te 测 , measured average value Te 均、 , absolute value of the difference between the measured value Te 测 and the measured average value Te 均 |Te 测 -Te 均 |, first deviation preset value T1, first preset time length t1, absolute value of the difference between the measured value Te 测 and the measured average value Te 均 |Te 测 -Te 均 | greater than or equal to the first temperature deviation preset value T1, the duration t a , and the like can reflect the information of the target sensor fault condition.

[0123] In one embodiment, when the rail vehicle is in the driving mode, the target sensor fault information can include the model, position, measured value Te 测 , measured average value Te 均 , absolute value of the difference between the measured value Te 测 and the measured average value Te 均 |Te 测 -Te 均| Second deviation preset value T2, second preset duration t2 measurement value Te 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 The duration t of the second temperature deviation preset value T2 being greater than or equal to the second temperature deviation preset value b Information such as this can reflect the fault status of the target sensor.

[0124] In one embodiment, when the rail vehicle is in a stopped mode, the target sensor fault information may further include the target sensor's model, location, and measured value Te. 测 Preset upper temperature limit T max The third preset duration t3, measured value Te 测 Greater than or equal to the preset upper temperature limit T max Duration t c Information such as this can reflect the fault status of the target sensor.

[0125] In one embodiment, when the rail vehicle is in a stopped mode, the target sensor fault information may further include the target sensor's model, location, and measured value Te. 测 Preset lower limit value T min Fourth preset duration t4, measured value Te 测 Less than or equal to the preset lower limit value T min Duration t d Information such as this can reflect the fault status of the target sensor.

[0126] This embodiment also provides a fresh air temperature sensor fault detection device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. The terms "module," "unit," "subunit," etc., used below refer to combinations of software and / or hardware that achieve a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0127] Figure 10 This is a structural block diagram of the fresh air temperature sensor fault detection device in this embodiment, as shown below. Figure 10 As shown, the fresh air temperature sensor fault detection device 90 includes: a mode determination module 92, a temperature acquisition module 94, and a fault detection module 96; wherein:

[0128] The mode determination module 92 is used to determine the operating mode of the rail vehicle;

[0129] Temperature acquisition module 94 is used to acquire the measured value of the target sensor and the average value of the measurements from multiple fresh air temperature sensors;

[0130] The fault detection module 96 is used to determine whether the target sensor is faulty based on the operating mode, measured value, and average measurement value.

[0131] In one embodiment, the pattern determination module 92 is used to obtain the travel speed V of the rail vehicle. 车 When the driving speed V 车 When the speed is greater than or equal to the preset speed V, the rail vehicle is determined to be in driving mode; when the driving speed V... 车 When the speed is less than the preset speed V, the rail vehicle is determined to be in parking mode.

[0132] In one embodiment, when the rail vehicle is in driving mode, the temperature acquisition module 94 is used to acquire the measured value Te from the target sensor. 测 And the average value Te of multiple fresh air temperature sensors 均 The fault detection module 96 is used to determine the measured value Te. 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 Is the measured value Te greater than or equal to the first preset temperature deviation value T1? 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 The duration t of the temperature deviation being greater than or equal to the first preset value T1 a Is it greater than or equal to the first preset duration t1? If so, the fault detection module 96 determines that the target sensor is faulty.

[0133] In one embodiment, when the rail vehicle is in a docked mode, the temperature acquisition module 94 is used to acquire the measured value Te from the target sensor. 测 And the average value Te of multiple fresh air temperature sensors 均 The fault detection module 96 is used to determine the measured value Te. 测 and the average value Te 均 The absolute value of the difference |Te 测 -Te 均 Is the measured value Te greater than or equal to the second temperature deviation preset value T2? 测 and the average value Te 均 The absolute value of the difference is greater than |Te 测 -Te 均 The duration t equal to the second temperature deviation preset value T2 b Is it greater than or equal to the second preset duration t2? If so, the fault detection module 96 determines that the target sensor is faulty.

[0134] In one embodiment, when the rail vehicle is in the parking mode, the temperature acquisition module 94 is configured to acquire the measurement value Te of the target sensor 测 ; the fault detection module 96 is configured to determine whether the measurement value Te 测 is greater than or equal to the preset upper temperature limit value T max , and whether the duration t max for which the measurement value is greater than or equal to the preset upper temperature limit value T c is greater than or equal to the third preset time length t3; if so, the fault detection module 96 determines that the target sensor is faulty.

[0135] In one embodiment, when the rail vehicle is in the parking mode, the temperature acquisition module 94 is configured to acquire the measurement value Te of the target sensor 测 ; the fault detection module 96 is configured to determine whether the measurement value Te 测 is less than or equal to the preset lower temperature limit value T min , and whether the duration t 测 for which the measurement value Te min is less than or equal to the preset lower temperature limit value T d is greater than or equal to the fourth preset time length t4; if so, the fault detection module 96 determines that the target sensor is faulty.

[0136] In one embodiment, as shown in Figure 11 , the fresh air temperature sensor fault detection device 90 further comprises an alarm module 98 configured to generate target sensor fault information and send the target sensor fault information to a background system for alarm.

[0137] In the embodiment, the working mode of the rail vehicle is determined by the mode determination module; the measurement value of the target sensor and the measurement average value of the plurality of fresh air temperature sensors are acquired by the temperature acquisition module; and whether the target sensor is faulty is determined by the fault detection module according to the working mode, the measurement value and the measurement average value. The device solves the problem of low accuracy of fresh air temperature sensor fault detection caused by different working modes of the vehicle, and realizes an accurate fresh air temperature sensor fault detection method.

[0138] It should be noted that each of the above modules can be a functional module or a program module, and can be implemented by software or hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor; or each of the above modules can also be located in different processors in any combination.

[0139] Each of the technical features of the above embodiments can be combined arbitrarily, and to make the description concise, each of the technical features in the above embodiments is not described in all possible combinations, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

[0140] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A fresh air temperature sensor failure detection method applied to a railway vehicle, the railway vehicle comprising a plurality of fresh air temperature sensors, characterized in that, The method comprises: determining the working mode of the rail vehicle; the working mode comprises a running mode and a stopping mode; obtaining a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors; when the rail vehicle is in the running mode, determining whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a first temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the first temperature deviation preset value is greater than or equal to a first preset time length; if so, determining that the target sensor is faulty; when the rail vehicle is in the stopping mode, determining whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a second temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the second temperature deviation preset value is greater than or equal to a second preset time length; if so, determining that the target sensor is faulty; the first temperature deviation preset value is less than the second temperature deviation preset value.

2. The fresh air temperature sensor fault detection method of claim 1, wherein, The determination of the working mode of the rail vehicle comprises: obtaining the running speed of the rail vehicle; when the running speed is greater than or equal to a preset speed, determining that the rail vehicle is in the running mode; when the running speed is less than the preset speed, determining that the rail vehicle is in the stopping mode.

3. The fresh air temperature sensor fault detection method of claim 2, wherein, Further comprising: when the rail vehicle is in the stopping mode, determining whether the measurement value is greater than or equal to a preset upper temperature limit value, and whether the duration that the measurement value is greater than or equal to the preset upper temperature limit value is greater than or equal to a third preset time length; if so, determining that the target sensor is faulty.

4. The fresh air temperature sensor fault detection method of claim 2, wherein, Further comprising: when the rail vehicle is in the stopping mode, determining whether the measurement value is less than or equal to a preset lower temperature limit value, and whether the duration that the measurement value is less than or equal to the preset lower temperature limit value is greater than or equal to a fourth preset time length; if so, determining that the target sensor is faulty.

5. The fresh air temperature sensor fault detection method of any one of claims 1-4, wherein, After determining that the target sensor is faulty, further comprising: generating target sensor fault information and sending it to the background system for alarm.

6. The fresh air temperature sensor fault detection method of claim 1, wherein, The method comprises: step S801, obtaining the running speed of the rail vehicle; step S802, when the running speed is greater than or equal to a preset speed, determining that the rail vehicle is in the running mode, and executing step S803; when the running speed is less than the preset speed, determining that the rail vehicle is in the stopping mode, and executing step S804; step S803, obtaining a measurement value of a target sensor and a measurement average value of the plurality of fresh air temperature sensors; determining whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a first temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the first temperature deviation preset value is greater than or equal to a first preset time length; if so, determining that the target sensor is faulty; Step S804, obtaining the measurement value of the target sensor and the measurement average value of the plurality of fresh air temperature sensors; determining whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a second temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the second temperature deviation preset value is greater than or equal to a second preset time length; if yes, determining that the target sensor is faulty, and if no, executing step S805; Step S805, determining whether the measurement value is greater than or equal to a preset upper temperature limit value, and whether the duration that the measurement value is greater than or equal to the preset upper temperature limit value is greater than or equal to a third preset time length; if yes, determining that the target sensor is faulty, and if no, executing step S806; Step S806, determining whether the measurement value is less than or equal to a preset lower temperature limit value, and whether the duration that the measurement value is less than or equal to the preset lower temperature limit value is greater than or equal to a fourth preset time length; if yes, determining that the target sensor is faulty.

7. The fresh air temperature sensor fault detection method according to claim 6, characterized in that: the first temperature deviation preset value is set to 3-8℃, and the first preset time length is set to 15-300s; the second temperature deviation preset value is set to 10-15℃, and the second preset time length is set to 15-300s; the preset upper temperature limit value is set to 60℃, and the third preset time length is set to 3-30s; the preset lower temperature limit value is set to -40℃, and the fourth preset time length is set to 3-30s; the first temperature deviation preset value is less than the second temperature deviation preset value; the third preset time length is less than the second preset time length, and the fourth preset time length is less than the second preset time length. The device comprises: a mode determination module for determining the working mode of the rail vehicle; the working mode comprises a driving mode and a stopping mode; a temperature acquisition module for obtaining the measurement value of the target sensor and the measurement average value of the plurality of fresh air temperature sensors, wherein the target sensor is any one of the plurality of fresh air temperature sensors; 8. A fresh air temperature sensor failure detection device applied to a railway vehicle, the railway vehicle comprising a plurality of fresh air temperature sensors, characterized in that, a fault detection module for determining, when the rail vehicle is in the driving mode, whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a first temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the first temperature deviation preset value is greater than or equal to a first preset time length; if yes, determining that the target sensor is faulty; when the rail vehicle is in the stopping mode, determining whether the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to a second temperature deviation preset value, and whether the duration that the absolute value of the difference between the measurement value and the measurement average value is greater than or equal to the second temperature deviation preset value is greater than or equal to a second preset time length; if yes, determining that the target sensor is faulty; the first temperature deviation preset value is less than the second temperature deviation preset value. ​ ​ ​

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