CN113532699A - Fault detection method and device for temperature sensor - Google Patents
Fault detection method and device for temperature sensor Download PDFInfo
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- CN113532699A CN113532699A CN202010319161.2A CN202010319161A CN113532699A CN 113532699 A CN113532699 A CN 113532699A CN 202010319161 A CN202010319161 A CN 202010319161A CN 113532699 A CN113532699 A CN 113532699A
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 140
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- 239000002826 coolant Substances 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 abstract 1
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- 238000003745 diagnosis Methods 0.000 description 9
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Abstract
The embodiment of the disclosure discloses a fault detection method and device for a temperature sensor, relates to the technical field of automobiles, and can solve the problem that the signal correctness of the temperature sensor cannot be monitored in a full temperature range in the prior art, so that the fault of the temperature sensor cannot be accurately diagnosed. The method mainly comprises the following steps: acquiring the temperature of the first cooling circuit detected by the first temperature sensor, and acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not; and if the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold value, determining that the first temperature sensor fails. Embodiments of the present disclosure are primarily applicable in vehicle cooling circuit temperature measurement scenarios.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of automobiles, in particular to a fault detection method and device of a temperature sensor.
Background
With the progress of society, automobiles become almost necessary transportation means for each family, so that the life of people is more and more convenient. In an automobile drive control system, temperature control is an extremely important link, and heat dissipation of a drive part is mainly realized by a cooling loop and a fan together. The fan operates in different states according to the temperature of the cooling circuit, and if a temperature sensor detecting the temperature of the cooling circuit fails, the measurement value of the temperature sensor will deviate from the actual situation. If the measured value is lower than the actual value, overheating of the cooling circuit may be caused, and normal operation of the vehicle may be affected; if the measured value is higher than the true value, the fan rotational speed increases, and the power consumption becomes excessive, and therefore, it is necessary to perform failure diagnosis for the temperature sensor that detects the temperature of the cooling circuit.
At present, a method for performing fault diagnosis on a temperature sensor mainly includes: the method comprises the following steps of recording temperature ranges respectively detected when different fault working conditions occur to a temperature sensor in advance, and determining the temperature ranges as invalid temperature ranges detected by the temperature sensor under the corresponding fault working conditions; and then, judging whether the temperature detected by the temperature sensor is within the preset invalid temperature range in real time, if the detected temperature is within the invalid temperature range corresponding to a certain fault working condition, determining that the temperature sensor fails, and if the detected temperature is not within any invalid temperature range, determining that the temperature sensor does not fail.
However, in practical applications, there is a certain error in the preset invalid temperature range, and there may be some unknown fault conditions, so even if the detected temperature is not within any preset invalid temperature range, the temperature sensor may be faulty, that is, if the currently detected temperature is not within the preset invalid temperature range, it is impossible to accurately detect whether the temperature sensor is faulty. That is to say, the existing diagnosis method can only realize fault detection of the temperature sensor within a specific temperature range, and cannot monitor the correctness of the signal of the temperature sensor in real time within the full temperature range, which has limitations.
Disclosure of Invention
The embodiment of the disclosure provides a fault detection method and device for a temperature sensor, and aims to solve the problem that in the prior art, the signal correctness of the temperature sensor cannot be monitored in a full temperature range, so that the fault of the temperature sensor cannot be accurately diagnosed.
The embodiment of the disclosure mainly provides the following technical scheme:
in a first aspect, an embodiment of the present disclosure provides a method for detecting a fault of a temperature sensor, the method including:
Acquiring the temperature of the first cooling circuit detected by the first temperature sensor, and acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
and if the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold value, determining that the first temperature sensor fails.
In some embodiments, said obtaining at least one reference temperature detected by at least one second temperature sensor comprises:
when a second cooling circuit where the at least one second temperature sensor is located is in an operating state, acquiring the temperatures of the second cooling circuits where the at least one second temperature sensor is located and respectively detecting, and taking the acquired temperatures of the second cooling circuits as reference temperatures; wherein the first temperature sensor is disposed within the first cooling circuit and the at least one second temperature sensor is disposed within a second, different cooling circuit.
In some embodiments, the method further comprises:
If all the second cooling loops are in a non-operation state, acquiring the ambient temperature outside the vehicle;
and if the temperature of the first cooling circuit detected by the first temperature sensor is less than the ambient temperature, determining that the first temperature sensor fails.
In some embodiments, said obtaining the ambient temperature outside the vehicle comprises:
and acquiring the ambient temperature outside the vehicle detected by a preset in-vehicle temperature sensor, wherein the preset in-vehicle temperature sensor comprises a temperature sensor irrelevant to a cooling loop.
In some embodiments, the first cooling circuit is pooled with the coolant of all the second cooling circuits in the vehicle;
and/or the temperature detected by the first temperature sensor is used for controlling the rotation of the fan by the controller after being collected by the controller.
In some embodiments, obtaining at least one reference temperature detected by the at least one second temperature sensor comprises:
acquiring the temperatures of the first cooling circuit respectively detected by the at least one second temperature sensor; wherein the first temperature sensor and the at least one second temperature sensor are disposed within the first cooling circuit and are each in series with the first cooling circuit;
The at least one second temperature sensor detects the temperature of the first cooling circuit as a reference temperature, respectively.
In some embodiments, the method further comprises:
and if the difference between a target reference temperature in the at least one reference temperature and the difference between the other reference temperatures and the temperature detected by the first temperature sensor are both greater than the preset difference threshold, determining that the second temperature sensor corresponding to the target reference temperature has a fault.
In some embodiments, different second temperature sensors correspond to different preset difference thresholds.
In some embodiments, the method further comprises:
and outputting fault reminding information containing the temperature sensor identification.
In a second aspect, embodiments of the present disclosure provide a fault detection apparatus of a temperature sensor, the apparatus including:
a first acquisition unit for acquiring the temperature of the first cooling circuit detected by the first temperature sensor;
a second acquisition unit for acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
The determining unit is used for determining that the first temperature sensor has faults when the difference between the temperature detected by the first temperature sensor and each reference temperature is larger than a preset difference threshold value.
In some embodiments, the second obtaining unit includes:
the first acquisition module is used for acquiring the temperatures of the second cooling loops respectively detected by the at least one second temperature sensor when the second cooling loop in which the at least one second temperature sensor is located is in an operating state, and taking the acquired temperature of the second cooling loop as a reference temperature; wherein the first temperature sensor is disposed within the first cooling circuit and the at least one second temperature sensor is disposed within a second, different cooling circuit.
In some embodiments, the apparatus further comprises:
a third acquisition unit configured to acquire an ambient temperature outside the vehicle if all of the second cooling circuits are in a non-operating state;
the determination unit is used for determining that the first temperature sensor is in fault when the temperature of the first cooling circuit detected by the first temperature sensor is lower than the ambient temperature.
In some embodiments, the third obtaining unit is configured to obtain an ambient temperature outside the vehicle detected by a preset in-vehicle temperature sensor, where the preset in-vehicle temperature sensor includes a temperature sensor unrelated to a cooling circuit.
In some embodiments, the first cooling circuit is pooled with the coolant of all the second cooling circuits in the vehicle;
and/or the temperature detected by the first temperature sensor is used for controlling the rotation of the fan by the controller after being collected by the controller.
In some embodiments, the second obtaining unit includes:
the second acquisition module is used for acquiring the temperatures of the at least one second temperature sensor respectively detected by the first cooling circuit; wherein the first temperature sensor and the at least one second temperature sensor are disposed within the first cooling circuit and are each in series with the first cooling circuit; the at least one second temperature sensor detects the temperature of the first cooling circuit as a reference temperature, respectively.
In some embodiments, the determining unit is further configured to determine that a second temperature sensor corresponding to a target reference temperature fails when differences between the target reference temperature of the at least one reference temperature and the temperatures detected by the other reference temperatures and the first temperature sensor are greater than corresponding preset difference thresholds.
In some embodiments, different second temperature sensors correspond to different preset difference thresholds.
In some embodiments, the apparatus further comprises:
and the output unit is used for outputting the fault reminding information containing the temperature sensor identification.
In a third aspect, an embodiment of the present disclosure provides a storage medium including a stored program, where, when the program runs, a device in which the storage medium is located is controlled to execute the method of the first aspect.
In a fourth aspect, embodiments of the present disclosure provide a fault detection apparatus of a temperature sensor, the apparatus including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method of the first aspect.
In a fifth aspect, embodiments of the present disclosure provide a vehicle comprising the apparatus of the fourth aspect.
By means of the technical scheme, the fault detection method and the fault detection device for the temperature sensors, provided by the embodiments of the present disclosure, can acquire the temperature of the first cooling circuit detected by the first temperature sensor, and take the temperature detected by the at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, and calculate whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, if so, it can be determined that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor has a fault. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
The foregoing description is only an overview of the embodiments of the present disclosure, and in order to make the technical means of the embodiments of the present disclosure more clearly understood, the embodiments of the present disclosure may be implemented in accordance with the content of the description, and in order to make the foregoing and other objects, features, and advantages of the embodiments of the present disclosure more clearly understood, the following detailed description of the embodiments of the present disclosure is given.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the present disclosure. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a flowchart of a method for detecting a fault of a temperature sensor according to an embodiment of the present disclosure;
fig. 2 shows a block diagram of a fault detection apparatus for a temperature sensor according to an embodiment of the present disclosure;
fig. 3 shows a block diagram of a fault detection device of another temperature sensor provided in an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In a first aspect, an embodiment of the present disclosure provides a method for detecting a fault of a temperature sensor, as shown in fig. 1, the method including:
101. the temperature of the first cooling circuit detected by the first temperature sensor is acquired, and at least one reference temperature detected by the at least one second temperature sensor is acquired.
The first cooling circuit is supplied with the coolant of all the second cooling circuits in the vehicle, i.e. the first cooling circuit belongs to the main cooling circuit in the vehicle and the second cooling circuit belongs to the branch cooling circuits in the vehicle. The temperature detected by the first temperature sensor is used for controlling the rotation of the fan by the controller after being collected by the controller. The reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not. The preset cooling circuit can be a first cooling circuit or a second cooling circuit, and is determined according to the connection condition of the temperature sensor and the cooling circuit.
In order to diagnose whether the first temperature sensor is malfunctioning, whether the temperature detected by the first temperature sensor is accurate may be determined by a difference between a real-time temperature of the first cooling circuit detected by the first temperature sensor and a reference temperature, using a temperature detected by the at least one second temperature sensor as the reference temperature, thereby determining whether the first temperature sensor is malfunctioning.
102. And if the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold value, determining that the first temperature sensor fails.
The different second temperature sensors may correspond to the same preset difference threshold, or may correspond to different preset difference thresholds. When different second temperature sensors correspond to different preset difference thresholds, a mapping table of the temperature sensor identifier of the second temperature sensor and the preset difference threshold can be set, and when needed, the mapping table can be obtained through table lookup.
Each temperature sensor in the at least one second temperature sensor detects the first cooling circuit or the second cooling circuit to obtain a temperature value, and the temperature values are used as reference temperatures to judge whether the difference between the temperature of the first cooling circuit detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold corresponding to each reference temperature. If only a part of the difference values are greater than the corresponding preset difference threshold values, or all the difference values are not greater than the corresponding preset difference threshold values, the accuracy of the temperature detection of the first temperature sensor cannot be accurately judged, so that whether the first temperature sensor fails or not cannot be determined. However, if all the difference values are greater than the corresponding preset difference threshold values, it is indicated that the temperature detected by the first temperature sensor is inaccurate, so that it can be determined that the first temperature sensor has failed.
In addition, in order to enable the temperature sensor with the fault to be repaired in time, fault reminding information containing the temperature sensor identification can be output. The temperature sensor identifier includes a character string for uniquely identifying one temperature sensor, and may be, for example, a code of the temperature sensor when the temperature sensor leaves a factory. The reminding mode of the fault reminding information comprises one or a combination of the following reminding modes: text, voice and indicator lights.
The fault detection method for the temperature sensor provided by the embodiment of the disclosure can acquire the temperature of the first cooling circuit detected by the first temperature sensor, take the temperature detected by the at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, calculate whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, and if the difference is greater than the preset difference threshold, determine that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor has a fault. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
In the above-described embodiments, it is mentioned that when the temperature sensor is connected to the cooling circuit in a different manner, the object detected by the second temperature sensor is different. The following is illustrated in each case:
the first condition is as follows: if the first temperature sensor is disposed in the first cooling circuit and the at least one second temperature sensor is disposed in a different second cooling circuit, the specific implementation manner of "acquiring at least one reference temperature detected by the at least one second temperature sensor" in step 101 may be: when the second cooling circuit where the at least one second temperature sensor is located is in an operating state, acquiring the temperature of the second cooling circuit where the at least one second temperature sensor is located, and taking the acquired temperature of the second cooling circuit as a reference temperature.
In the case where the second temperature sensor is provided in the second cooling circuit, the second temperature sensor having no fault can accurately detect the temperature of the second cooling circuit in which it is located when the second cooling circuit starts operating. Therefore, when only one second cooling circuit is operated, the temperature of the second cooling circuit is detected as a reference temperature by using the second temperature sensor in the operated second cooling circuit, and it is determined whether the difference between the temperature detected by the first temperature sensor and the reference temperature is greater than a corresponding preset difference threshold. If so, the temperature detected by the first temperature sensor is inaccurate, so that the first temperature sensor is determined to be in fault, otherwise, the first temperature sensor is determined not to be in fault.
When two or more second cooling circuits operate, the second temperature sensors in the plurality of second cooling circuits in the operating state can be used for detecting the temperatures of the respective second cooling circuits as reference temperatures, whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than the corresponding preset difference threshold value or not is judged, if yes, the temperature detected by the first temperature sensor is inaccurate, and therefore the first temperature sensor is determined to be in fault, otherwise, the first temperature sensor is determined not to be in fault.
It should be added that the preset difference threshold corresponding to each second cooling circuit may be different, and the specific value is determined according to the actual situation.
Further, if all the second cooling circuits are in the non-operating state, it is possible to diagnose whether the first temperature sensor is malfunctioning or not by using the other temperature as the reference temperature. Specifically, the ambient temperature outside the vehicle may be obtained; since the temperature of the first cooling circuit is certainly not lower than the ambient temperature, it is determined that the first temperature sensor is malfunctioning if the temperature of the first cooling circuit detected by the first temperature sensor is lower than the ambient temperature.
The ambient temperature outside the vehicle may be detected by a preset in-vehicle temperature sensor including a temperature sensor unrelated to the cooling circuit.
Case two: if the first temperature sensor and the at least one second temperature sensor are respectively disposed in the first cooling circuit and are respectively connected in series with the first cooling circuit, the specific implementation manner of "obtaining at least one reference temperature detected by the at least one second temperature sensor" in step 101 may be: acquiring the temperatures of the first cooling circuit respectively detected by the at least one second temperature sensor; the at least one second temperature sensor detects the temperature of the first cooling circuit as a reference temperature, respectively.
That is, when the first temperature sensor and the at least one second temperature sensor are respectively connected in series with the first cooling circuit, it is possible to acquire that the at least one second temperature sensor respectively detects the temperature of the first cooling circuit, and use the result detected by the at least one second temperature sensor respectively detects the temperature of the first cooling circuit as a reference temperature to diagnose the correctness of the detection result of the first temperature sensor.
In addition, since the first temperature sensor and the at least one second temperature sensor are both connected in series with the first cooling circuit and are each used to detect the temperature of the first cooling circuit, it is possible to diagnose whether or not a failure occurs in the remaining one of the second temperature sensors using a part of the second temperature sensors and the first temperature sensors, in addition to diagnosing whether or not the first temperature sensor has a failure using the second temperature sensors. For example, if the difference between a target reference temperature of the at least one reference temperature and the other reference temperatures respectively and the temperature detected by the first temperature sensor is greater than the corresponding preset difference threshold, it is determined that the second temperature sensor corresponding to the target reference temperature has a fault.
The preset difference threshold may be the same or different, and is determined according to the actual situation.
In a second aspect, according to the above method embodiment, another embodiment of the present disclosure further provides a fault detection apparatus for a temperature sensor, as shown in fig. 2, the apparatus including:
a first acquisition unit 21 for acquiring the temperature of the first cooling circuit detected by the first temperature sensor;
a second acquisition unit 22 for acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
A determining unit 23, configured to determine that the first temperature sensor fails when a difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold.
In some embodiments, as shown in fig. 3, the second obtaining unit 22 includes:
the first obtaining module 221 is configured to obtain, when a second cooling circuit in which the at least one second temperature sensor is located is in an operating state, temperatures of the second cooling circuits in which the at least one second temperature sensor is located respectively, and use the obtained temperatures of the second cooling circuits as reference temperatures; wherein the first temperature sensor is disposed within the first cooling circuit and the at least one second temperature sensor is disposed within a second, different cooling circuit.
In some embodiments, as shown in fig. 3, the apparatus further comprises:
a third acquiring unit 24 configured to acquire an ambient temperature outside the vehicle if all the second cooling circuits are in a non-operating state;
the determination unit 23 is configured to determine that the first temperature sensor is faulty when the temperature of the first cooling circuit detected by the first temperature sensor is less than the ambient temperature.
In some embodiments, the third obtaining unit 24 is configured to obtain the ambient temperature outside the vehicle detected by a preset in-vehicle temperature sensor, where the preset in-vehicle temperature sensor includes a temperature sensor unrelated to the cooling circuit.
In some embodiments, the first cooling circuit is pooled with the coolant of all the second cooling circuits in the vehicle;
and/or the temperature detected by the first temperature sensor is used for controlling the rotation of the fan by the controller after being collected by the controller.
In some embodiments, the second obtaining unit 22 includes:
a second obtaining module 222, configured to obtain temperatures of the first cooling circuit respectively detected by the at least one second temperature sensor; wherein the first temperature sensor and the at least one second temperature sensor are disposed within the first cooling circuit and are each in series with the first cooling circuit; the at least one second temperature sensor detects the temperature of the first cooling circuit as a reference temperature, respectively.
In some embodiments, the determining unit 23 is further configured to determine that the second temperature sensor corresponding to the target reference temperature fails when a difference between a target reference temperature of the at least one reference temperature and the temperature detected by the other reference temperature and the temperature detected by the first temperature sensor is greater than the preset difference threshold.
In some embodiments, different second temperature sensors correspond to different preset difference thresholds.
In some embodiments, as shown in fig. 3, the apparatus further comprises:
and the output unit 25 is used for outputting the fault reminding information containing the temperature sensor identifier.
The fault detection device for the temperature sensor provided by the embodiment of the disclosure can acquire the temperature of the first cooling circuit detected by the first temperature sensor, take the temperature detected by the at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, calculate whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, and if the difference is greater than the preset difference threshold, determine that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor has a fault. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
The device comprises a processor and a storage medium, wherein the first acquiring unit 21, the second acquiring unit 22, the determining unit 23 and the like are stored in the storage medium as program units, and the processor executes the program units stored in the storage medium to realize corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from a storage medium. One or more than one kernel can be set, and the fault detection of the temperature sensor is ensured to be more accurate by adjusting kernel parameters.
The fault detection device for the temperature sensor provided by the embodiment of the second aspect can be used for executing the fault detection method for the temperature sensor provided by any one of the first to second aspects, and the related meanings and specific implementation manners of the relevant devices can be referred to the related descriptions in any one of the first to second aspects, and are not described in detail herein.
In a third aspect, an embodiment of the present disclosure provides a storage medium including a stored program, where the apparatus on which the storage medium is controlled to execute the method described above when the program runs.
The storage medium may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
When executed, a program stored in a storage medium provided by an embodiment of the disclosure may acquire a temperature of a first cooling circuit detected by a first temperature sensor, take a temperature detected by at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, calculate whether a difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, and if the difference is greater than the preset difference threshold, may determine that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor has a fault. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
In a fourth aspect, embodiments of the present disclosure provide a fault detection apparatus of a temperature sensor, the apparatus including a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method as described above.
The fault detection device for the temperature sensor provided by the embodiment of the disclosure can acquire the temperature of the first cooling circuit detected by the first temperature sensor, take the temperature detected by the at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, calculate whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, and if the difference is greater than the preset difference threshold, determine that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor has a fault. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
In a fifth aspect, embodiments of the present disclosure provide a vehicle comprising the apparatus of the fifth aspect.
The vehicle provided by the embodiment of the disclosure can acquire the temperature of the first cooling circuit detected by the first temperature sensor, take the temperature detected by the at least one second temperature sensor as a reference temperature, compare the temperature of the first cooling circuit detected by the first temperature sensor with each reference temperature, calculate whether the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold, and if the difference is greater than the preset difference threshold, determine that the temperature detected by the first temperature sensor is inaccurate, thereby determining that the first temperature sensor fails. Therefore, when diagnosing whether the first temperature sensor is faulty or not, the embodiments of the present disclosure implement the measurement value of the second temperature sensor as a reference, and are not limited to a specific temperature range, and can implement a fault diagnosis function in the entire temperature range.
Embodiments of the present disclosure also provide a computer program product adapted to perform program code for initializing the following method steps when executed on a vehicle:
acquiring the temperature of the first cooling circuit detected by the first temperature sensor, and acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
and if the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold value, determining that the first temperature sensor fails.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (15)
1. A method of fault detection of a temperature sensor, the method comprising:
acquiring the temperature of the first cooling circuit detected by the first temperature sensor, and acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
and if the difference between the temperature detected by the first temperature sensor and each reference temperature is greater than a preset difference threshold value, determining that the first temperature sensor fails.
2. The method of claim 1, wherein said obtaining at least one reference temperature detected by at least one second temperature sensor comprises:
when a second cooling circuit where the at least one second temperature sensor is located is in an operating state, acquiring the temperatures of the second cooling circuits where the at least one second temperature sensor is located and respectively detecting, and taking the acquired temperatures of the second cooling circuits as reference temperatures; wherein the first temperature sensor is disposed within the first cooling circuit and the at least one second temperature sensor is disposed within a second, different cooling circuit.
3. The method of claim 2, further comprising:
if all the second cooling loops are in a non-operation state, acquiring the ambient temperature outside the vehicle;
and if the temperature of the first cooling circuit detected by the first temperature sensor is less than the ambient temperature, determining that the first temperature sensor fails.
4. The method of claim 3, wherein the obtaining the ambient temperature outside the vehicle comprises:
and acquiring the ambient temperature outside the vehicle detected by a preset in-vehicle temperature sensor, wherein the preset in-vehicle temperature sensor comprises a temperature sensor irrelevant to a cooling loop.
5. The method according to claim 1, characterized in that the first cooling circuit is pooled with the coolant of all the second cooling circuits in the vehicle;
and/or the temperature detected by the first temperature sensor is used for controlling the rotation of the fan by the controller after being collected by the controller.
6. The method of claim 1, wherein obtaining at least one reference temperature detected by at least one second temperature sensor comprises:
acquiring the temperatures of the first cooling circuit respectively detected by the at least one second temperature sensor; wherein the first temperature sensor and the at least one second temperature sensor are disposed within the first cooling circuit and are each in series with the first cooling circuit;
The at least one second temperature sensor detects the temperature of the first cooling circuit as a reference temperature, respectively.
7. The method of claim 6, further comprising:
and if the difference between a target reference temperature in the at least one reference temperature and the difference between the other reference temperatures and the temperature detected by the first temperature sensor are larger than the corresponding preset difference threshold, determining that the second temperature sensor corresponding to the target reference temperature has a fault.
8. The method of claim 1, wherein different second temperature sensors correspond to different preset difference thresholds.
9. The method according to any one of claims 1-8, further comprising:
and outputting fault reminding information containing the temperature sensor identification.
10. A fault detection device of a temperature sensor, characterized in that it comprises:
a first acquisition unit for acquiring the temperature of the first cooling circuit detected by the first temperature sensor;
a second acquisition unit for acquiring at least one reference temperature detected by at least one second temperature sensor; the reference temperature is the temperature of a preset cooling loop detected by the second temperature sensor and is used for judging whether the temperature detected by the first temperature sensor is accurate or not;
The determining unit is used for determining that the first temperature sensor has faults when the difference between the temperature detected by the first temperature sensor and each reference temperature is larger than a preset difference threshold value.
11. The apparatus of claim 10, wherein the second obtaining unit comprises:
the first acquisition module is used for acquiring the temperatures of the second cooling loops respectively detected by the at least one second temperature sensor when the second cooling loop in which the at least one second temperature sensor is located is in an operating state, and taking the acquired temperature of the second cooling loop as a reference temperature; wherein the first temperature sensor is disposed within the first cooling circuit and the at least one second temperature sensor is disposed within a second, different cooling circuit.
12. The apparatus of claim 10, further comprising:
a third acquisition unit configured to acquire an ambient temperature outside the vehicle if all of the second cooling circuits are in a non-operating state;
the determination unit is used for determining that the first temperature sensor is in fault when the temperature of the first cooling circuit detected by the first temperature sensor is lower than the ambient temperature.
13. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the method of any one of claims 1 to 9.
14. A failure detection device of a temperature sensor, characterized in that the device comprises a storage medium; and one or more processors, the storage medium coupled with the processors, the processors configured to execute program instructions stored in the storage medium; the program instructions when executed perform the method of any of claims 1 to 9.
15. A vehicle, characterized in that it comprises the device of claim 14.
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| CN202010319161.2A CN113532699A (en) | 2020-04-21 | 2020-04-21 | Fault detection method and device for temperature sensor |
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| CN202010319161.2A CN113532699A (en) | 2020-04-21 | 2020-04-21 | Fault detection method and device for temperature sensor |
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