Temperature sensor low-temperature fault detection method, apparatus and device, storage medium, and program product

Abstract

A temperature sensor low-temperature fault detection method, apparatus and device, and a medium. The method comprises: when a first fault signal sent by a temperature sensor is detected, obtaining air pump working state information; when the air pump working state information satisfies preset requirements, collecting the voltage of a vehicle to obtain a target voltage; and performing fault detection on the temperature sensor on the basis of the target voltage, when the target voltage falls within a preset voltage range, determining that the temperature sensor has a fault and giving an alarm, and when the target voltage does not fall within the preset voltage range, determining that the temperature sensor has no fault.

Description

Temperature sensor low temperature fault detection method, device, equipment, storage medium and program product Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 2024108860993, filed on July 3, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicles, and in particular, to a temperature sensor low temperature fault detection method, device, equipment, storage medium and program product. BACKGROUND

[0003] With the continuous progress of automobile technology and the improvement of comfort requirements, air suspension systems gradually become the standard configuration of high-end vehicles due to their excellent ride comfort and high adjustability. In the air suspension system, the air pump as an important component is responsible for providing the necessary air pressure for the air suspension system to maintain the vehicle height. However, the air pump will generate heat during operation, and if the temperature is too high or too low, it will affect its performance and life, therefore, real-time monitoring of the air pump temperature is particularly important. Especially in low temperature environment, the cold start and running condition of the air pump directly affects the reliability of the air suspension system.

[0004] In related technologies, most air suspension systems use the method of installing temperature sensors (usually thermistors) on the surface of the air pump housing to monitor the temperature of the air pump. The controller indirectly calculates the temperature of the air pump by reading the voltage value output by the temperature sensor, and performs temperature control or fault diagnosis based on this. This method is simple and direct, and can achieve real-time monitoring, but in some special cases, such as extreme low temperature environment, this monitoring method will encounter challenges. SUMMARY

[0005] The technical problem of how to prevent low temperature from causing air pump temperature sensor false failure is solved by utilizing one or more embodiments of the present disclosure.

[0006] In a first aspect, the disclosure provides a temperature sensor low-temperature fault detection method. The method is applied to a vehicle including a temperature sensor and an air pump. The temperature sensor is used to detect the temperature of the air pump. The method includes: when a first fault signal emitted by the temperature sensor is detected, obtaining air pump working state information; when the air pump working state information meets a preset requirement, collecting a voltage of the vehicle to obtain a target voltage; and performing fault detection on the temperature sensor according to the target voltage. When the target voltage is within a preset voltage range, it is determined that the temperature sensor has a fault and an alarm is triggered. When the target voltage is outside the preset voltage range, it is determined that the temperature sensor has no fault.

[0007] In a second aspect, the disclosure also provides a temperature sensor low-temperature fault detection device. The device includes: an obtaining module configured to obtain air pump working state information when a first fault signal emitted by the temperature sensor is detected; a judging module configured to collect a voltage of the vehicle to obtain a target voltage when the air pump working state information meets a preset requirement; and a detection module configured to perform fault detection on the temperature sensor according to the target voltage. When the target voltage is within a preset voltage range, it is determined that the temperature sensor has a fault and an alarm is triggered. When the target voltage is outside the preset voltage range, it is determined that the temperature sensor has no fault.

[0008] In a third aspect, the disclosure also provides a temperature sensor fault detection device. The device includes a memory, a processor, and a temperature sensor fault detection program stored in the memory and executable on the processor. The temperature sensor fault detection program is configured to implement the steps of the temperature sensor fault detection method of the first aspect.

[0009] In a fourth aspect, the disclosure also provides a computer-readable storage medium. The medium is a computer-readable medium. A computer program is stored on the medium. The computer program is executable by a processor to implement the steps of the temperature sensor low-temperature fault detection method described above.

[0010] In a fifth aspect, the disclosure also provides a computer-readable storage medium. The medium is a computer-readable medium. A computer program is stored on the medium. The computer program is executable by a processor to implement the steps of the temperature sensor low-temperature fault detection method described above. BRIEF DESCRIPTION OF DRAWINGS

[0011] FIG. 1 is a schematic structural block diagram of a vehicle to which a temperature sensor low-temperature fault detection method according to some embodiments of the disclosure is applied;

[0012] FIG. 2 is a flowchart of a temperature sensor low-temperature fault detection method according to some embodiments of the present disclosure;

[0013] FIG. 3 is a flowchart of a temperature sensor low-temperature fault detection method according to some other embodiments of the present disclosure;

[0014] FIG. 4 is a schematic diagram of a module structure of an embodiment temperature sensor low-temperature fault detection device according to some embodiments of the present disclosure; and

[0015] FIG. 5 is a schematic diagram of a device structure of a hardware operating environment involved in a temperature sensor low-temperature fault detection method according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0016] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present disclosure, and are not intended to limit the present disclosure.

[0017] In order to better understand the technical solutions of the present disclosure, the following will be described in detail in combination with the accompanying drawings and specific embodiments.

[0018] It can be understood that the resistance of the thermistor will significantly increase at extremely low temperatures, causing the voltage value collected by the controller to be close to or equal to the voltage value when the thermistor is open, which will be logically misinterpreted as a temperature sensor open circuit fault. According to the conventional fault diagnosis strategy, the controller may mistakenly believe that there is an open circuit problem with the temperature sensor, and trigger the corresponding fault signal, thereby lighting the fault light, and even making the entire suspension system unable to work normally, seriously affecting the driving experience and safety of the vehicle. In addition, this diagnosis strategy lacks adaptability to environmental temperature, and cannot accurately distinguish between real faults and false alarms caused by environmental factors, reducing the reliability and user satisfaction of the air suspension system.

[0019] The main solution of the embodiments of the present disclosure is that when a first fault signal is detected from the temperature sensor, the working state information of the air pump is obtained, when the working state information of the air pump meets the preset requirements, the voltage of the vehicle is collected to obtain a target voltage, and the temperature sensor is detected according to the target voltage. When the target voltage is within a preset voltage range, it is determined that the temperature sensor has a fault and an alarm is triggered; when the target voltage is outside the preset voltage range, it is determined that the temperature sensor does not have a fault.

[0020] Based on this, the present disclosure provides a temperature sensor low-temperature fault detection method, and FIG. 1 is a flowchart of a temperature sensor low-temperature fault detection method according to some embodiments of the present disclosure.

[0021] Referring to FIG. 1, the temperature sensor low-temperature fault detection method can include steps S10-S30.

[0022] At step S10, when the first fault signal sent by the temperature sensor is detected, the air pump working state information is acquired.

[0023] It should be noted that, as shown in FIG. 1, the temperature sensor low-temperature fault detection method is applied to a vehicle 100, which includes a temperature sensor 130 and an air pump 120. The temperature sensor 130 is used to detect the temperature on the air pump 120. When the vehicle 100 is powered on, the initial voltage of the vehicle is collected. When the initial voltage is in a first preset voltage range, a first fault signal is generated, and the first fault signal is set to a preset fault value.

[0024] In some embodiments, the above-mentioned voltage is the voltage across a thermistor in the temperature sensor.

[0025] In some embodiments, the voltage collected when powered on is U. Assuming that the air pump is in a low-temperature environment (-40°C), the value of U will be close to the upper limit value (such as 5V). At this time, the error signal (ErrStates) is not immediately set to 1, but another fault suspicion signal (ErrPending) is set to 1. When the first fault signal ErrPending is detected and set to 1, the first fault signal is equivalent to the above-mentioned fault suspicion signal, and the air pump working state monitoring mechanism is immediately started, aiming to in-depth analyze the potential temperature sensor fault root cause, and ensure the accuracy of the judgment.

[0026] In some embodiments, the current ambient temperature and the initial state of the air pump can be recorded. By tracking each opening and closing cycle of the air pump in real time, the opening time and the closing time of the air pump are accurately accumulated, and these data are compared and analyzed with the pre-set parameters. During continuous monitoring, the current, voltage fluctuation of the air pump, and whether there is abnormal noise or vibration are synchronously checked, which are additional indicators for assisting in judging whether the air pump is working normally. Through the analysis of these comprehensive information, the health status of the air pump can be more comprehensively evaluated, and it can be distinguished whether it is a real sensor fault or only a temporary voltage abnormality caused by low-temperature environment. In addition, the system also has learning and adaptation functions, which can dynamically adjust the threshold and judgment logic according to the historical data, so as to cope with different low-temperature environments and air pump aging conditions, and improve the flexibility and adaptability of fault diagnosis. Once it is confirmed that the air pump is running normally under the preset conditions, but the voltage value is still abnormal, it is confirmed that the sensor is faulty, and ErrStates is set to 1; otherwise, if the voltage value returns to the normal range, it indicates that the temperature sensor has returned to normal work after heating, at this time, ErrPending will be cleared, and the system returns to the normal operation mode, ensuring the reliability of the air pump and the suspension system and the safety and comfort experience of the driver and the passenger.

[0027] In some embodiments, when the gas pump working state monitoring mechanism is started, the active gas pressure management system is also intervened, and the gas tank is opened and the pressure relief valve is opened at the same time, so as to quickly reduce the pressure of the gas tank to a preset safe low level, such as 5 bar or less. An instant gas pressure demand scenario is created, prompting the gas pump to start frequently in the next short period of time to make up for the reduced gas pressure due to pressure relief, thereby artificially extending the cumulative start time of the gas pump and shortening the shutdown time, so that the entire gas pump working cycle is more in line with the conditions required by the fault judgment logic. After the driver adjusts the suspension or starts the vehicle, the gas tank automatically starts the gas supplement function, and the gas pump will continue to work until the pressure of the gas tank returns to the normal operating pressure. This series of operations cleverly uses the natural operation demand of the vehicle without affecting the normal function of the vehicle, and induces the gas pump to start and stop frequently in a short period of time, which not only ensures the reasonable working load of the gas pump, but also creates favorable conditions for accurate diagnosis of the temperature sensor.

[0028] In step S20, when the gas pump working state information meets the preset requirements, the voltage of the vehicle is collected to obtain a target voltage.

[0029] It should be noted that the actual working information is compared with the pre-set requirements to accurately judge whether the gas pump is in an ideal working state, and the special working conditions in low temperature environment are considered. By accumulating the start time and shutdown time of the gas pump, it is ensured that the sum of the two exceeds the preset total cumulative time. This step is based on in-depth research on the working characteristics of the gas pump in extremely low temperature (-40℃), including analysis of the temperature rise curve and natural cooling curve. Not only the total time is considered, but also the threshold of the start time proportion is set to ensure that the gas pump has enough time in the working state in the low temperature environment. The purpose of this is to generate enough heat for the gas pump to offset the influence of the low temperature outside, so that the temperature sensor can restore normal reading within a reasonable time. In addition, the limitation of the single shutdown time of the gas pump aims to prevent the gas pump from failing to achieve the expected heating effect due to natural cooling too quickly in the shutdown state, thereby avoiding false diagnosis caused by accidental long downtime. After the gas pump working state information meets the pre-set logical conditions, the system enters a more detailed monitoring stage, and the real working condition of the temperature sensor is further verified by accurately collecting the voltage of the vehicle.

[0030] In step S30, the temperature sensor is detected for fault according to the target voltage. When the target voltage is within the preset voltage range, it is determined that the temperature sensor has a fault and an alarm is given; when the target voltage is outside the preset voltage range, it is determined that the temperature sensor has no fault.

[0031] It should be understood that when the gas pump experiences the preset working condition cycle, i.e. the start and shutdown time of the gas pump meet the preset conditions, the voltage value is collected to accurately judge the fault detection of the temperature sensor.

[0032] In some embodiments, the preset voltage range is closer to the upper limit of the voltage than outside the preset voltage range.

[0033] In some embodiments, the voltage values outside the preset voltage range are all less than the voltage values inside the preset voltage range.

[0034] In some embodiments, further comprising: when the first fault signal of the temperature sensor is detected, controlling the working state of the air pump to make the air pump working state information meet the preset requirement.

[0035] In some embodiments, when the air pump working state information meets the preset requirement, the air pump has undergone sufficient heating cycles.

[0036] In some embodiments, when the air pump working state information meets the preset requirement, the air pump has undergone temperature recovery.

[0037] In some embodiments, the system will collect the voltage value of the air pump temperature sensor again, which is called the target voltage. The collection of the target voltage is carried out after the air pump has undergone multiple heating and cooling cycles, aiming to capture the influence of air pump temperature change on the output of the temperature sensor. At this time, the measurement result of the target voltage will be compared with the abnormally high voltage value in the low temperature environment before, and with the voltage output range that the temperature sensor should have under normal working conditions. Compare the target voltage with the preset voltage range, when the target voltage is within the preset voltage range, determine that the temperature sensor has a fault, generate a second fault signal, and set the second fault signal to a preset fault value.

[0038] In some embodiments, the preset voltage range can be a voltage range close to the upper limit, such as a voltage range close to 5V. If the target voltage is within the preset voltage range, it means that the target voltage is still close to the maximum value of the sampling voltage, which indicates that although the air pump has undergone sufficient heating cycles, the temperature sensor output is still abnormal, and at this time it is determined that the temperature sensor indeed has a fault, generates an ErrStates signal, sets the ErrStates flag to 1, and notifies the application layer of the temperature sensor fault. Correspondingly, if the target voltage is outside the preset voltage range, it can be considered that the target voltage is no longer close to the upper limit, for example, no longer close to 5V, but returns to the normal range less than 5V, which means that after the temperature of the air pump recovers, the temperature sensor starts to work normally, indicating that the previous abnormal voltage reading is caused by the low temperature environment rather than the temperature sensor fault.

[0039] In some embodiments, if the target voltage is still close to the maximum value of the sampling voltage, i.e., still very large, it indicates that the temperature sensor output is abnormal even though the air pump has undergone a sufficient heating cycle, at this time it is determined that the temperature sensor is indeed faulty, the ErrStates signal is generated, the ErrStates flag is set to 1, the application layer is informed of the temperature sensor fault, a warning is triggered or a protection measure is taken to avoid potential system damage. When the target voltage is a normal sampling value, it is determined that the temperature sensor is not faulty, and the first fault signal is set to a normal value.

[0040] In some embodiments, if the target voltage returns to the normal range, it means that the air pump temperature has risen to a certain extent, and the temperature sensor starts to work normally, indicating that the previous abnormal voltage reading is caused by a low temperature environment rather than a temperature sensor fault. At this time, the fault suspicion state is cleared, the ErrPending signal is set to 0, the sensor is confirmed to be working normally, and the normal operation mode is restored, avoiding unnecessary maintenance operations and user experience degradation caused by false positives.

[0041] The embodiment provides a low-temperature fault detection method for a temperature sensor. When a first fault signal from the temperature sensor is detected, air pump working state information is obtained. When the air pump working state information meets a preset requirement, the voltage of the vehicle is collected to obtain a target voltage. The temperature sensor is fault detected according to the target voltage. When the target voltage is within a preset voltage range, it is determined that the temperature sensor has a fault and an alarm is generated. When the target voltage is outside the preset voltage range, it is determined that the temperature sensor does not have a fault. By monitoring the air pump start and stop time parameters and accurately collecting the voltage, false positives of the air pump temperature sensor caused by low temperature are prevented, the diagnostic accuracy is improved, and the driving experience is ensured.

[0042] Based on the first embodiment of the present disclosure, in the second embodiment of the present disclosure, the same or similar contents as the above-mentioned first embodiment can be referred to the above introduction, and will not be described in detail. On this basis, please refer to FIG. 2, the vehicle reversing anti-collision control method step S20 further includes steps S201-S203.

[0043] Step S201, according to the air pump working state information, a single air pump opening time and a single air pump closing time are obtained.

[0044] It should be noted that in order to accurately monitor the performance of the air pump in a low temperature environment, the system uses an advanced algorithm to track and record the opening and closing cycle of the air pump in real time, and obtains the single air pump opening time and the single air pump closing time, which is a key step to realize intelligent fault diagnosis.

[0045] In some embodiments, when the vehicle is powered on, the system enters a highly sensitive monitoring mode, continuously collecting air pump working state information through sensors. Once the air pump is started, a timer starts to accumulate the single air pump opening time, and the value of the single air pump opening time Topen is recorded when the air pump stops working. Then, when the air pump is in the closed state, the single air pump closing time Tclose is also accurately measured. This process is repeated continuously, and each opening and closing of the air pump is recorded independently to form the air pump cumulative opening time T1 and the air pump cumulative closing time T2. open

[0046] Step S202, determine whether the single air pump opening time and the single air pump closing time meet the preset requirements.

[0047] It should be noted that the air pump cumulative opening time is obtained according to the single air pump opening time, and the air pump cumulative closing time is obtained according to the single air pump closing time.

[0048] In some embodiments, the single air pump opening time Topen and the single air pump closing time Tclose are recorded to form the air pump cumulative opening time T1 and the air pump cumulative closing time T2. open close In some embodiments, the single air pump opening time Topen and the single air pump closing time Tclose are recorded to form the air pump cumulative opening time T1 and the air pump cumulative closing time T2. Obtain the first temperature rise curve and the second temperature rise curve, the first temperature rise curve is the temperature rise curve after the low-temperature air pump is started, and the second temperature rise curve is the temperature rise curve after the low-temperature air pump is naturally cooled,

[0049] In some embodiments, two key temperature rise curves are obtained through experiments by a test program: the first temperature rise curve and the second temperature rise curve. The first temperature rise curve records the gradual increase of the internal temperature of the air pump over time after the air pump is started in an extremely low temperature environment (for example, -40℃). This curve describes the thermodynamic change of the air pump from cold state to working temperature range, and intuitively shows the heating efficiency and temperature rise rate of the air pump, which is a key basis for evaluating whether the air pump can quickly overcome the influence of low temperature and ensure normal operation. The second temperature rise curve focuses on the natural cooling process after the air pump is turned off, that is, under the condition of no external heating source, how the air pump shell and its internal components are naturally cooled to approach the ambient temperature. This curve reveals the thermal conductivity of the air pump material, the heat exchange efficiency of the shell design, and the heat preservation or heat dissipation capacity of the system, which is of great significance for preventing overheating and protecting the air pump from thermal stress damage. Then, according to the first temperature rise curve and the second temperature rise curve, the total cumulative duration Ttotal of the air pump after being started, the proportion K1 of the air pump opening time in the total cumulative duration Ttotal of the air pump after being started, and the maximum duration Tallow of the single air pump closing in the total cumulative duration Ttotal of the air pump after being started are obtained. sum s ​​​The single pump start time and single pump stop time are determined based on the cumulative start time of the air pump, the cumulative stop time of the air pump, the total cumulative duration after the air pump is turned on, the proportion of the total cumulative duration after the air pump is turned on, and the maximum allowable stop time for a single air pump stop within the total cumulative duration after the air pump is turned on.

[0050] In some embodiments, the cumulative air pump duration Ttotal is calculated based on the cumulative air pump start time and cumulative air pump stop time. Then, the air pump start time Tstart is calculated based on the total cumulative duration and the time percentage. Finally, when the cumulative air pump duration is greater than the total cumulative duration when the air pump is started, the cumulative air pump start time is greater than the air pump start time, and the single air pump stop time is less than the maximum stop time, it is determined that the single air pump start time and single air pump stop time meet the preset requirements.

[0051] In some embodiments, the preset requirement is T 总 >T sum T can be obtained from the first and second temperature rise curves. sum It is 180s, then T1>T 开启 According to the first and second temperature rise curves, the time K1 during which the air pump is turned on is 75% of the total cumulative time after the air pump is turned on. Therefore, T_start is the total cumulative time T_total after the air pump is turned on. sum 75%, that is, 135s, and also T close <T s Based on the first and second temperature rise curves, the maximum allowable duration T for a single pump shutdown within the total cumulative time after the pump is turned on can be obtained. s The preset time is 60 seconds. Specifically, a single pump start-up time and single pump stop-down time are considered to meet the preset requirements if all three of the following conditions are met: cumulative pump start-up time, cumulative pump stop-down time, single pump stop-down time, total cumulative duration after pump start-up, the percentage of time the pump is on within the total cumulative duration after pump start-up, and the maximum allowable single pump stop-down time within the total cumulative duration after pump start-up. Conversely, if at least one of the following conditions is met: the calculated cumulative pump start-up time is less than or equal to the total cumulative duration when the pump is on; the cumulative pump start-up time is less than or equal to the pump start-up time; or the single pump stop-down time is greater than or equal to the maximum stop-down time, then the single pump start-up time and single pump stop-down time do not meet the preset requirements, and vehicle voltage will not be collected.

[0052] Step S203: When the single air pump start time and single air pump stop time meet the preset requirements, the vehicle voltage is collected to obtain the target voltage.

[0053] In some embodiments, the acquisition of the target voltage not only occurs at the moment when the air pump is turned on, but also continues throughout the monitoring period to capture voltage fluctuations caused by temperature changes. In the initial stage of air pump operation, especially in extremely low temperature environments, the high resistance of the thermistor may cause the acquired voltage to approach its theoretical open circuit voltage value, which is usually a signal that the temperature sensor fails to accurately reflect the actual temperature. Therefore, attention should be paid to the voltage changes before and after the air pump reaches a stable working temperature to ensure the reliability of the data.

[0054] Through continuous monitoring of the target voltage, it can be determined in real time whether the air pump has been effectively heated, and thus the temperature sensor is freed from the influence of the low temperature environment and enters the normal detection range. If the target voltage is still close to the maximum value of the sampling voltage after the air pump is turned on and off in the expected mode, that is, it is still very large, it indicates that the temperature sensor output is still abnormal despite the sufficient heating cycle of the air pump. At this time, it is determined that the temperature sensor is indeed faulty, the ErrStates flag is set to 1, and the application layer is notified of the temperature sensor fault, which may trigger a warning or take protective measures to avoid potential system damage. When the target voltage is a normal sampling value, it is determined that the temperature sensor is not faulty, and the first fault signal is set to a normal value. Specifically, if the target voltage returns to the normal range, it means that the air pump temperature has risen to a certain extent, and the temperature sensor starts to work normally, indicating that the previous abnormal voltage reading was caused by the low temperature environment rather than a temperature sensor fault. At this time, the ErrPending signal is cleared to 0, the temperature sensor is confirmed to be working normally, and the normal operation mode is restored, avoiding unnecessary maintenance operations and user experience degradation due to false alarms.

[0055] In some embodiments, by obtaining the single air pump on time and the single air pump off time according to the air pump working state information, it is determined whether the single air pump on time and the single air pump off time meet the preset requirements. When the single air pump on time and the single air pump off time meet the preset requirements, the vehicle voltage is acquired to obtain the target voltage, the air pump working condition is accurately monitored, and the voltage acquisition timing is accurate, thereby optimizing the fault diagnosis accuracy.

[0056] The present disclosure also provides a temperature sensor low temperature fault detection device, which comprises: an acquisition module 10 configured to acquire air pump working state information when a first fault signal emitted by a temperature sensor is detected; a judgment module 20 configured to acquire a voltage of a vehicle to obtain a target voltage when the air pump working state information meets preset requirements; and a detection module 30 configured to perform fault detection on the temperature sensor according to the target voltage, and to determine that the temperature sensor is faulty and to alarm when the target voltage is within a preset voltage range, and to determine that the temperature sensor is not faulty when the target voltage is outside the preset voltage range.

[0057] The temperature sensor low-temperature fault detection device provided by the present disclosure adopts the temperature sensor low-temperature fault detection method in the above embodiments, and can solve the technical problem of how to prevent low temperature from causing the air pump temperature sensor to report a false fault. Compared with the prior art, the temperature sensor low-temperature fault detection device provided by the present disclosure has the same beneficial effects as the temperature sensor low-temperature fault detection method provided by the above embodiments, and other technical features in the temperature sensor low-temperature fault detection device are the same as the features disclosed in the above method embodiments, which will not be repeated here.

[0058] In some embodiments, the determining module 20 is further configured to obtain a single air pump opening time and a single air pump closing time according to the air pump working state information; determine whether the single air pump opening time and the single air pump closing time meet a preset requirement; and collect the vehicle voltage to obtain a target voltage when the single air pump opening time and the single air pump closing time meet the preset requirement.

[0059] In some embodiments, the determining module 20 is further configured to obtain an air pump cumulative opening time according to the single air pump opening time; obtain an air pump cumulative closing time according to the single air pump closing time; obtain a first temperature rise curve and a second temperature rise curve, wherein the first temperature rise curve is a temperature rise curve after the air pump is opened at low temperature, and the second temperature rise curve is a temperature rise curve during natural cooling of the air pump at low temperature; obtain a total cumulative duration after the air pump is opened, a time proportion of the air pump opening in the total cumulative duration after the air pump is opened, and a maximum duration allowed for single air pump closing in the total cumulative duration after the air pump is opened according to the first temperature rise curve and the second temperature rise curve; and determine whether the single air pump opening time and the single air pump closing time meet the preset requirement according to the air pump cumulative opening time, the air pump cumulative closing time, the single air pump closing time, the total cumulative duration after the air pump is opened, the time proportion of the air pump opening in the total cumulative duration after the air pump is opened, and the maximum closing duration allowed for single air pump closing in the total cumulative duration after the air pump is opened.

[0060] In some embodiments, the determining module 20 is further configured to obtain a calculated air pump cumulative duration according to the air pump cumulative opening time and the air pump cumulative closing time; obtain an air pump opening time according to the total cumulative duration and the time proportion; determine that the single air pump opening time and the single air pump closing time meet the preset requirement when the calculated air pump cumulative duration is greater than the total cumulative duration during which the air pump is opened, the air pump cumulative opening time is greater than the air pump opening time, and the single air pump closing time is less than the maximum closing duration; and determine that the single air pump opening time and the single air pump closing time do not meet the preset requirement when at least one of the following conditions is met: the calculated air pump cumulative duration is less than or equal to the total cumulative duration during which the air pump is opened, the air pump cumulative opening time is less than or equal to the air pump opening time, and the single air pump closing time is greater than or equal to the maximum closing duration.

[0061] In some embodiments, the detection module 30 is further configured to compare the target voltage with a preset voltage range, and generate a second fault signal when the target voltage is within the preset voltage range, set the second fault signal to a preset fault value, and determine that the temperature sensor is faulty.

[0062] In some embodiments, the detection module 30 is further configured to compare the target voltage with a preset voltage range, and generate a second fault signal when the target voltage is within the preset voltage range, set the second fault signal to a preset fault value, and determine that the temperature sensor is faulty.

[0063] In some embodiments, the acquisition module 10 is further configured to acquire an initial voltage of the vehicle when the vehicle is powered on, generate a first fault signal when the initial voltage is within a first preset voltage range, and set the first fault signal to a preset fault value.

[0064] The present disclosure provides a temperature sensor low-temperature fault detection device, which comprises at least one processor and a memory in communication connection with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the temperature sensor low-temperature fault detection method in the above-mentioned embodiment one.

[0065] Reference is made to FIG. 4, which shows a structural schematic diagram of a temperature sensor low-temperature fault detection device suitable for implementing the embodiments of the present disclosure. The temperature sensor low-temperature fault detection device in the embodiments of the present disclosure can include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle terminals (such as vehicle navigation terminals), and the like, as well as fixed terminals such as digital TVs, desktop computers, and the like. The temperature sensor low-temperature fault detection device shown in FIG. 4 is merely an example, and should not bring any limitation to the functions and use range of the embodiments of the present disclosure.

[0066] As shown in FIG. 4, the temperature sensor low-temperature fault detection device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a ROM (Read Only Memory) 1002 or programs loaded from a storage device 1003 into a RAM (Random Access Memory) 1004. Various programs and data required for operation of the temperature sensor low-temperature fault detection device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, an LCD (Liquid Crystal Display), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the temperature sensor low-temperature fault detection device to communicate with other devices wirelessly or by wire to exchange data. Although the temperature sensor low-temperature fault detection device with various systems is shown in the figure, it should be understood that all the shown systems are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0067] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of the embodiments of the present disclosure are performed.

[0068] The temperature sensor low-temperature fault detection device provided by the present disclosure adopts the temperature sensor low-temperature fault detection method in the above-mentioned embodiments, and can solve the technical problem of how to prevent low temperature from causing the temperature sensor of the air pump to falsely report a fault. Compared with the prior art, the temperature sensor low-temperature fault detection device provided by the present disclosure has the same beneficial effects as the temperature sensor low-temperature fault detection method provided by the above-mentioned embodiments, and other technical features in the temperature sensor low-temperature fault detection device are the same as the features disclosed in the previous embodiment method, which will not be described here.

[0069] It should be understood that various parts of the present disclosure can be realized in hardware, software, firmware, or a combination thereof. In the description of the above-described embodiments, specific features, structures, materials or characteristics can be combined in any appropriate manner in any one or more embodiments or examples.

[0070] The above description is merely that of specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art can easily conceive of changes or substitutions within the technical scope disclosed by the present disclosure, and all such changes and substitutions should be encompassed within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the scope of protection of the claims.

[0071] The present disclosure provides a computer readable medium having stored thereon computer readable program instructions (i.e., a computer program) for executing the temperature sensor low-temperature fault detection method in the above-described embodiments.

[0072] The computer readable medium provided by the present disclosure may, for example, be a U disk, but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable medium can include, but are not limited to, an electrical connection having one or more conductive wires, a portable computer diskette, a hard disk, a RAM (Random Access Memory), a ROM (Read Only Memory), an EPROM (Erasable Programmable Read Only Memory) or a flash memory, an optical fiber, a CD-ROM (CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present embodiment, the computer readable medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable medium can be transmitted in any appropriate medium, including but not limited to electrical wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0073] The above-described computer readable medium can be included in the temperature sensor low-temperature fault detection device; or can exist separately without being assembled into the temperature sensor low-temperature fault detection device.

[0074] The computer-readable medium can be a machine-readable storage medium, including but not limited to diskette, RAM, ROM, EEPROM, solid state drive (SSD) or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Additionally, any application herein can be implemented as a program of instructions for use by or in connection with a computer. The instructions can be stored in any suitable storage medium that can be accessed by a computer, including but not limited to diskette, hard disk, optical disk, online services, or any other medium. The computer program product can be implemented as a program of instructions for use by or in connection with a computer. The instructions can be stored in any suitable storage medium that can be accessed by a computer, including but not limited to diskette, hard disk, optical disk, online services, or any other medium. The computer program product can be implemented as a program of instructions for use by or in connection with a computer. The instructions can be stored in any suitable storage medium that can be accessed by a computer, including but not limited to diskette, hard disk, optical disk, online services, or any other medium.

[0075] The flowcharts and block diagrams in the drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowcharts and block diagrams can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or combinations of special purpose hardware and computer instructions.

[0076] The modules involved in the embodiments of the present disclosure can be implemented in the form of software or in the form of hardware. In some cases, the name of the module does not constitute a limitation on the module itself.

[0077] The readable medium provided by the present disclosure is a computer readable medium, which stores computer readable program instructions (i.e. computer program) for executing the temperature sensor low-temperature fault detection method described above, and can solve the technical problem of how to prevent low temperature from causing the air pump temperature sensor to report a false fault. Compared with the prior art, the computer readable medium provided by the present disclosure has the same beneficial effects as the temperature sensor low-temperature fault detection method provided by the above-mentioned embodiments, and will not be described here.

[0078] The present disclosure also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the temperature sensor low-temperature fault detection method as described above.

[0079] The computer program product provided by the present disclosure can solve the technical problem of how to prevent low temperature from causing the air pump temperature sensor to report a false fault. Compared with the prior art, the computer program product provided by the present disclosure has the same beneficial effects as the temperature sensor low-temperature fault detection method provided by the above-mentioned embodiments, and will not be described here. The above-mentioned only some embodiments of the present disclosure, not therefore limit the patent scope of the present disclosure, any equivalent structural transformation made by using the content of the present disclosure specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present disclosure.

Claims

1. A method for detecting low-temperature failure of a temperature sensor, applied to a vehicle, wherein the vehicle comprises a temperature sensor and an air pump, the temperature sensor is used to detect the temperature on the air pump, and the method comprises: obtaining air pump working state information when a first failure signal from the temperature sensor is detected; collecting a voltage of the vehicle to obtain a target voltage when the air pump working state information meets preset requirements; and performing failure detection on the temperature sensor according to the target voltage, determining that the temperature sensor has a failure and alarming when the target voltage is within a preset voltage range; and determining that the temperature sensor has no failure when the target voltage is outside the preset voltage range. The voltage is a voltage across a thermistor in the temperature sensor. The preset voltage range is closer to an upper limit of the voltage than outside the preset voltage range. Voltage values outside the preset voltage range are all less than voltage values within the preset voltage range. 5.The method of claim 1, further comprising: controlling a working state of the air pump to make the air pump working state information meet preset requirements when the first failure signal from the temperature sensor is detected. The air pump has undergone sufficient heating cycles when the air pump working state information meets the preset requirements. The air pump has undergone temperature recovery when the air pump working state information meets the preset requirements. The step of collecting the voltage of the vehicle to obtain the target voltage when the air pump working state information meets the preset requirements comprises: obtaining a single air pump opening time and a single air pump closing time according to the air pump working state information; determining whether the single air pump opening time and the single air pump closing time meet preset requirements; and collecting the voltage of the vehicle to obtain the target voltage when the single air pump opening time and the single air pump closing time meet the preset requirements. The step of determining whether the single air pump opening time and the single air pump closing time meet the preset requirements comprises: obtaining a cumulative air pump opening time according to the single air pump opening time; obtaining a cumulative air pump closing time according to the single air pump closing time; obtaining a first temperature rise curve and a second temperature rise curve to determine whether the single air pump opening time and the single air pump closing time meet the preset requirements, wherein the first temperature rise curve is a temperature rise curve after the air pump is opened at low temperature, and the second temperature rise curve is a temperature rise curve after the air pump is naturally cooled at low temperature. The step of determining whether the single air pump opening time and the single air pump closing time meet the preset requirements comprises: obtaining a total cumulative time length after the air pump is opened, a time proportion of air pump opening in the total cumulative time length after the air pump is opened, and a maximum time length of single air pump closing allowed in the total cumulative time length after the air pump is opened according to the first temperature rise curve and the second temperature rise curve, to determine whether the single air pump opening time and the single air pump closing time meet the preset requirements. ​ ​ ​ ​ 2. The method of claim 1, wherein, ​ 3. The method of claim 2, wherein, ​ 4. The method of claim 2, wherein, ​ ​ ​ 6. The method of claim 1, wherein, ​ 7. The method of claim 1, wherein, ​ 8. The method of claim 1, wherein, ​ ​ ​ ​ 9. The method of claim 8, wherein, ​ ​ ​ ​ 10. The method of claim 9, wherein, ​ ​ 11. The method of claim 10, wherein, ​ The single-time air pump opening time and the single-time air pump closing time are determined whether to meet preset requirements according to the air pump cumulative opening time, the air pump cumulative closing time, the single-time air pump closing time, the total cumulative time length after the air pump is opened, the time proportion of the air pump opening in the total cumulative time length after the air pump is opened, and the maximum closing time length of the single-time air pump closing allowed in the total cumulative time length after the air pump is opened.

12. The method of claim 11, wherein, The step of determining whether the single-time air pump opening time and the single-time air pump closing time meet preset requirements according to the air pump cumulative opening time, the air pump cumulative closing time, the single-time air pump closing time, the total cumulative time length after the air pump is opened, the time proportion of the air pump opening in the total cumulative time length after the air pump is opened, and the maximum closing time length of the single-time air pump closing allowed in the total cumulative time length after the air pump is opened, comprises: The total cumulative time length of the air pump is calculated according to the air pump cumulative opening time and the air pump cumulative closing time; The air pump opening time is calculated according to the total cumulative time length and the time proportion; When the total cumulative time length of the air pump is greater than the total cumulative time length after the air pump is opened, the air pump cumulative opening time is greater than the air pump opening time, and the single-time air pump closing time is less than the maximum closing time length, it is determined that the single-time air pump opening time and the single-time air pump closing time meet preset requirements.

13. The method of claim 11, wherein, The step of determining whether the single-time air pump opening time and the single-time air pump closing time meet preset requirements according to the air pump cumulative opening time, the air pump cumulative closing time, the single-time air pump closing time, the total cumulative time length after the air pump is opened, the time proportion of the air pump opening in the total cumulative time length after the air pump is opened, and the maximum closing time length of the single-time air pump closing allowed in the total cumulative time length after the air pump is opened, comprises: The total cumulative time length of the air pump is calculated according to the air pump cumulative opening time and the air pump cumulative closing time; The air pump opening time is calculated according to the total cumulative time length and the time proportion; When at least one of the total cumulative time length of the air pump is less than or equal to the total cumulative time length after the air pump is opened, the air pump cumulative opening time is less than or equal to the air pump opening time, and the single-time air pump closing time is greater than or equal to the maximum closing time length is met, it is determined that the single-time air pump opening time and the single-time air pump closing time do not meet preset requirements. The step of determining that the temperature sensor has a fault and alarming when the target voltage is in the preset voltage range, comprises:

14. The method of claim 1, wherein, The target voltage is compared with the preset voltage range; When the target voltage is in the preset voltage range, a second fault signal is generated, the second fault signal is set as a preset fault value, it is determined that the temperature sensor has a fault and alarming. The step of determining that the temperature sensor has no fault when the target voltage is out of the preset voltage range, comprises:

15. The method of claim 1, wherein, The target voltage is compared with the preset voltage range; When the target voltage is out of the preset voltage range, the first fault signal is set as a preset normal value, it is determined that the temperature sensor has no fault. ​ 16. The method of claim 1, wherein, The method comprises the following steps: When the vehicle is powered on, an initial voltage of the vehicle is collected; When the initial voltage is in a first preset voltage range, a first fault signal is generated, and the first fault signal is set as a preset fault value.

17. A temperature sensor low temperature fault detection apparatus, characterized by, The device comprises: a collecting module configured to collect the initial voltage of the vehicle when the first fault signal is detected; a judging module configured to collect the voltage of the vehicle to obtain a target voltage when the working state information of the air pump meets a preset requirement; and a detecting module configured to detect the temperature sensor according to the target voltage, and determine that the temperature sensor has a fault and alarm when the target voltage is in a preset voltage range, and determine that the temperature sensor has no fault when the target voltage is out of the preset voltage range.

18. A temperature sensor fault detection apparatus comprising: A memory, a processor, and a temperature sensor fault detection program stored in the memory and executable on the processor, the temperature sensor fault detection program being configured to implement the steps of the temperature sensor fault detection method according to any one of claims 1 to 16.

19. A computer readable storage medium comprising a temperature sensor fault detection program stored thereon, the temperature sensor fault detection program being executable by a processor to implement the steps of the temperature sensor fault detection method according to any one of claims 1 to 16.

20. A computer program product comprising a temperature sensor fault detection program stored thereon, the temperature sensor fault detection program being executable by a processor to implement the steps of the temperature sensor fault detection method according to any one of claims 1 to 16.

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