CN114137347A - Fault diagnosis method, calibration method and device for heat dissipation system - Google Patents
Fault diagnosis method, calibration method and device for heat dissipation system Download PDFInfo
- Publication number
- CN114137347A CN114137347A CN202111424489.1A CN202111424489A CN114137347A CN 114137347 A CN114137347 A CN 114137347A CN 202111424489 A CN202111424489 A CN 202111424489A CN 114137347 A CN114137347 A CN 114137347A
- Authority
- CN
- China
- Prior art keywords
- heat dissipation
- fan
- dissipation system
- interrupt
- fans
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 132
- 238000003745 diagnosis Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 76
- 238000012795 verification Methods 0.000 claims description 43
- 238000001816 cooling Methods 0.000 claims description 39
- 230000002159 abnormal effect Effects 0.000 claims description 27
- 230000001960 triggered effect Effects 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 9
- 238000001914 filtration Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
Abstract
The invention provides a fault diagnosis method, a calibration method and a device for a heat dissipation system, which are applied to the technical field of automobiles. The fault diagnosis process of the method is realized based on two factors of the working current and the control signal of each fan, compared with the diagnosis method which is realized by only depending on the working current in the prior art, the method has more reference factors and more strict fault judgment conditions, thereby being beneficial to improving the accuracy of the diagnosis result and meeting the actual application requirements.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a fault diagnosis method, a calibration method and a calibration device for a cooling system.
Background
In practical application, many application scenarios need to be provided with a heat dissipation system, for example, in the field of automobile manufacturing, the heat dissipation system is arranged in an automobile seat, so that the temperature of the seat can be effectively reduced, particularly the temperature of a part in contact with a driver and an occupant can be reduced, meanwhile, the air circulation of the contact part can be enhanced, and the feeling of the driver and the occupant can be further improved.
In order to ensure reliable operation of the heat dissipation system, the operating state of the heat dissipation system needs to be diagnosed, and whether the heat dissipation system is in a fault state or not needs to be identified in time. In the prior art, most of diagnosis methods collect the working current of the cooling system, and if the obtained working current is lower than a preset current value, the fault of the cooling system is judged.
However, in the actual diagnosis process, the situation of interference sampling precision such as electromagnetic interference and current fluctuation often occurs, and the accuracy of the acquired working current is not high, so that the accuracy of the diagnosis result is low, and the actual application requirements are difficult to meet.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method, a method and a device for diagnosing faults of a heat dissipation system, which are used for simultaneously diagnosing faults in combination with control signals of fans on the basis of collecting working currents of the fans of the heat dissipation system, thereby improving accuracy of a diagnosis result and meeting requirements of practical applications, and the specific scheme is as follows:
in a first aspect, the present invention provides a method for diagnosing a fault of a heat dissipation system, which is applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, the method including:
acquiring starting instructions of a plurality of fans included in the heat dissipation system;
responding to the starting instruction, and outputting a PWM control signal to at least one of the fans;
monitoring the working current of each fan and the interrupt signal of each fan;
wherein the interrupt signal is triggered by a PWM feedback signal that jumps in synchronization with a PWM control signal of the corresponding fan;
and under the conditions that the working current of each fan is smaller than a preset current threshold value and the interrupt signal of each fan is abnormal, judging that the heat dissipation system has fan open-circuit fault.
Optionally, the method for diagnosing a fault of a heat dissipation system according to the first aspect of the present invention further includes:
and setting an interrupt function of the heat dissipation controller to count the interrupt triggered by the interrupt signal.
Optionally, the process of determining whether the interrupt signal of the fan is abnormal includes:
acquiring an interrupt count value of an interrupt function corresponding to the fan according to a preset diagnosis period;
and if the interrupt count value of the current diagnosis period is the same as the interrupt count value of the previous diagnosis period, judging that the interrupt signal of the fan is abnormal.
Optionally, the process of determining whether the interrupt signal of the fan is abnormal includes:
counting the duration of the interruption signal of the fan which is not detected to obtain a first duration;
and if the first duration reaches a first duration threshold, judging that the interrupt signal of the fan is abnormal.
Optionally, if the working current of at least one of the fans is greater than or equal to the preset current threshold, or the interrupt signal of at least one of the fans is normal, it is determined that the heat dissipation system is normal.
Optionally, the method for diagnosing a fault of a heat dissipation system according to any one of the first aspect of the present invention further includes: configuring a feedback port of the heat dissipation controller to interrupt the extraction, wherein the interruption is triggered by a level rising edge.
In a second aspect, the present invention provides a method for checking a fault of a heat dissipation system, which is applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, the method including:
acquiring a starting instruction;
responding to the starting instruction, and controlling the cooling system to be in a target verification mode;
the target verification mode comprises at least one of a plurality of preset verification modes of the heat dissipation system, and any preset verification mode comprises a communication state of each fan;
acquiring an actual diagnosis result obtained by diagnosing the heat dissipation system according to the heat dissipation system fault diagnosis method of any one of the first aspects of the invention, and an expected diagnosis result corresponding to the target verification mode;
and if the actual diagnosis result is consistent with the expected diagnosis result, judging that the actual diagnosis result is valid.
Optionally, the preset check modes include:
a first check mode in which the interrupt count value corresponding to each fan changes according to a fixed period;
a second check mode in which an interrupt count value corresponding to at least one of the fans does not change according to a fixed period;
and a third verification mode in which the interrupt count value corresponding to each fan is unchanged.
In a third aspect, the present invention provides a heat dissipation system fault diagnosis device applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, the device including:
the first acquisition unit is used for acquiring opening instructions of a plurality of fans included in the heat dissipation system;
an output unit for outputting a PWM control signal to at least one of the fans in response to the turn-on instruction;
the monitoring unit monitors the working current of each fan and the interrupt signal of each fan;
wherein the interrupt signal is triggered by a PWM feedback signal that jumps in synchronization with a PWM control signal of the corresponding fan;
the first judging unit is used for judging that the heat dissipation system has fan open-circuit faults under the conditions that the working current of each fan is smaller than a preset current threshold value and the interrupt signal of each fan is abnormal.
In a fourth aspect, the present invention provides a heat dissipation system fault checking device, which is applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, the device including:
the second acquisition unit is used for acquiring a starting instruction;
the control unit is used for responding to the starting instruction and controlling the heat dissipation system to be in a target verification mode;
the target verification mode comprises at least one of a plurality of preset verification modes of the heat dissipation system, and any preset verification mode comprises a communication state of each fan;
a third obtaining unit, configured to obtain an actual diagnosis result obtained by diagnosing the heat dissipation system according to the heat dissipation system fault diagnosis method of any one of the first aspects of the present invention, and an expected diagnosis result corresponding to the target verification mode;
and the second judging unit is used for judging that the actual diagnosis result is valid if the actual diagnosis result is consistent with the expected diagnosis result.
The cooling system fault diagnosis method provided by the invention is applied to a cooling controller of a cooling system comprising a plurality of fans, the cooling controller outputs PWM control signals to at least one of the fans after acquiring the opening instruction of the fans, monitors the working current of each fan and the interrupt signal of each fan, and judges that the cooling system has fan open-circuit fault if the working current of each fan is smaller than a preset current threshold and the interrupt signal of each fan is abnormal. In the fault diagnosis method of the heat dissipation system, the interrupt signal of any fan is triggered by the PWM feedback signal which jumps synchronously with the PWM control signal of the corresponding fan, so that the fault diagnosis process provided by the invention is realized based on two factors of the working current and the control signal of each fan.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for diagnosing a fault of a heat dissipation system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit structure for acquiring interrupt signals of fans of the heat dissipation system according to the embodiment of the present invention;
fig. 3 is a flowchart of a method for checking a fault of a heat dissipation system according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a fault diagnosis apparatus for a heat dissipation system according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating another fault diagnosis apparatus for a heat dissipation system according to an embodiment of the present invention;
fig. 6 is a block diagram illustrating a fault diagnosis apparatus for a heat dissipation system according to another embodiment of the present invention;
fig. 7 is a block diagram of a heat dissipation system fault checking apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a fault diagnosis method for a cooling system, which is mainly used for diagnosing whether the cooling system has an open-circuit fault or not, and further provides a fault verification method for the cooling system on the basis of the fault diagnosis method. The invention provides a fault diagnosis method and a fault verification method for a heat dissipation system, which are applied to the heat dissipation system comprising a plurality of fans, particularly to the situation in the field of automobile manufacturing.
Further, the fault diagnosis method and the fault verification method for the cooling system provided by the embodiment of the invention are particularly applied to a controller, the controller may be a controller included in the cooling system itself, or another controller which is not included in the cooling system and can acquire corresponding data and run a corresponding control program, when being applied to a cooling system of an automobile seat, the method and the device can be applied to the cooling controller of the automobile seat, and can also be applied to other controllers on a vehicle, such as a vehicle controller.
Referring to fig. 1, fig. 1 is a flowchart of a method for diagnosing a fault of a heat dissipation system according to an embodiment of the present invention, where the flowchart of the method for diagnosing a fault according to the embodiment may include:
s100, obtaining starting instructions of a plurality of fans included in the heat dissipation system.
The acquisition of the open command can be realized based on various ways. For example, the heat dissipation controller to which the method for diagnosing a fault of a heat dissipation system according to the embodiment of the present invention is applied is directly electrically connected to a control switch of the heat dissipation system, and when a user turns on the heat dissipation system through the control switch, the heat dissipation controller may acquire a corresponding electrical signal, such as a high level lasting for a certain duration, where the high level lasting for a certain duration is an on instruction; for another example, the user clicks a virtual switch displayed on the console for turning on the cooling system, the console generates a turn-on command according to the user's clicking operation, and the cooling controller can obtain the turn-on command through the vehicle-mounted communication link. Of course, the opening instruction may be obtained in other manners, which are not listed here.
And S110, responding to the starting command, and outputting a PWM control signal to at least one fan.
As mentioned above, the heat dissipation system includes a plurality of fans, and the heat dissipation controller outputs the PWM control signal to at least one of the fans to control the operation of the corresponding fan after obtaining the turn-on command. It should be noted that, for specific fans to which the PWM control signal is output, the process of determining whether the specific fan is turned on through the turn-on instruction and the process of controlling the fan to operate through the PWM control signal, which are related to the specific instruction content of the turn-on instruction, may be implemented based on the related technology, and the present invention is not limited thereto.
And S120, monitoring the working current of each fan and the interrupt signal of each fan.
Under the condition that all fans in the heat dissipation system are normally connected, the fan receiving the PWM control signal starts to operate, so that the working current of the fan can be monitored, and of course, for the fan not receiving the PWM control signal, the corresponding working current is zero. It can be understood that, for a certain heat dissipation system, the magnitude of the normal operating current of each fan in the system is known, and if the power supply circuit of the fan fails, the corresponding operating current naturally changes, so that the connection state of the fan can be judged based on the operating current of the fan.
Furthermore, in practical application, the heat dissipation system operates under the control of the corresponding control signal, and the corresponding control signal cannot be effectively received naturally even when the fan is in an open circuit state, so that whether the open circuit fault occurs in the fan can be judged based on the control signal of the fan. Based on this, in the fault diagnosis method provided in the embodiment of the present invention, the PWM feedback signal that jumps synchronously with the PWM control signal of the fan triggers the interrupt signal, and the connection state of the fan is determined by monitoring the interrupt signal corresponding to each fan.
As mentioned above, the control of each fan in the car seat heat dissipation system is implemented based on the PWM control signal, and since the PWM control signal is composed of high and low levels occurring according to a preset period, each level jump can be used as an interrupt signal of the controller, the monitoring of the interrupt signal of each fan can be implemented through the circuit topology shown in fig. 2.
Taking the back-rest fan in fig. 2 as an example, under the condition that the back-rest fan is normally connected, the cooling system controller outputs a PWM control signal to the back-rest fan in response to a turn-on command, and simultaneously, through sampling by the sampling resistors R1 and R2, a PWM feedback signal can be synchronously sent to the cooling system controller, and level jump of the PWM feedback signal is synchronous with the PWM control signal, so that under the condition that the PWM control signal is normally sent, the PWM feedback signal can continuously form an interrupt, so that the controller detects a corresponding interrupt signal.
S130, judging whether the working current of each fan is smaller than a preset current threshold value, if so, executing S140, and if not, executing S160.
When the heat dissipation system comprises a plurality of fans, any one fan is in an open circuit state, the working current of the fan is reduced, and when the working current of any one fan is smaller than a preset threshold value, the fan can be preliminarily judged to have a fault. The specific value of the preset current threshold is determined by combining the actual diagnosis precision requirement and the actual control requirement of the heat dissipation system, and the specific value of the preset current threshold is not limited by the invention.
Optionally, in order to improve the accuracy of the diagnosis result and reduce the influence of external interference on the diagnosis result in the diagnosis process, whether the working current of each fan is smaller than the preset current threshold may be determined in a plurality of sampling and judging manners.
Specifically, for any fan, the working current of the fan can be collected according to a preset sampling rule to obtain a plurality of current sampling values, and if each current sampling value is smaller than a preset current threshold, it is determined that the working current of the fan is smaller than the preset current threshold; on the contrary, if at least one current sampling value is larger than or equal to the preset current threshold value, the working current of the fan is judged to be larger than or equal to the preset current threshold value.
Optionally, in order to further improve the accuracy of current sampling, after the working current is collected at any time, the obtained current sampling value may be subjected to first-order filtering processing, and of course, other filtering processing operations may also be adopted, and are not expanded here.
It should be noted that the preset sampling rule mentioned in the foregoing mainly sets specific contents such as the sampling frequency of the working current of the fan, the total sampling duration, and the like, and any sampling rule capable of obtaining a plurality of current sampling values is optional, and on the premise of not exceeding the core concept scope of the present invention, the preset sampling rule also belongs to the protection scope of the present invention.
S140, judging whether the interrupt signals of the fans are abnormal, if so, executing S150, and if not, executing S160.
And under the condition that the working current of each fan in the heat dissipation system is judged to be smaller than the preset current threshold, further judging whether the interrupt signals of each fan in the heat dissipation system are abnormal, if the interrupt signals of each fan are abnormal, executing S150, and if the interrupt signals of at least one fan are normal, executing S160.
It should be noted that, in combination of S140 and S150, it is determined that the condition for the open-fan fault of the heat dissipation system is very severe, and such a determination condition is set based on the practical use of the user. Based on the foregoing, the main function of the heat dissipation system is to reduce the ambient temperature and improve the user experience, and if one fan in the heat dissipation system is opened, that is, the operation of the entire heat dissipation system is stopped, which is obviously contrary to the above-mentioned function of the heat dissipation system, in the practical application of the heat dissipation system, all fans meeting the user requirement should be started as far as possible, and the operation of all fans cannot be stopped because one or several fans in all fans are opened, so that it is determined that the open-fan fault exists in the heat dissipation system only under the condition that the interrupt signals of all fans are abnormal and the operating currents of all fans are smaller than the preset current threshold.
Optionally, an embodiment of the present invention provides a method for determining whether an interrupt signal of a fan is abnormal, where for each fan, a duration of the interrupt signal of the fan that is not detected is counted to obtain a first duration, and if the first duration reaches a first duration threshold, it is determined that the interrupt signal of the fan is abnormal. It will be appreciated that if the fan is in a normal operating state, the control signal for the fan is necessarily continuously sent, and accordingly, the interrupt signal triggered by the control signal is also necessarily continuously detected, and if the interrupt signal is not detected within the first time threshold, the fan is determined to be in an open state.
Further, another method for determining whether an interrupt signal of a fan is abnormal is provided in the embodiments of the present invention.
Specifically, before the fault diagnosis method provided by the embodiment of the present invention is applied, the feedback port of the controller is configured to interrupt the recovery, and the rising edge of the level triggers the interrupt, so as to determine whether an open-circuit fault exists by interrupting the feedback. In order to avoid increasing the interrupt load rate of the controller, the interrupt function in the controller may be set to count the interrupts triggered by the PWM control signal of the fan, and the interrupts may be triggered as long as the PWM feedback signal corresponding to the PWM control signal exists, and accordingly, the interrupt count value fed back by the interrupt function in the controller may change.
Based on this, for each fan, according to a preset diagnosis period, for example, 200ms, an interrupt count value fed back by an interrupt function corresponding to the fan may be obtained, and if the interrupt count value of the current diagnosis period is the same as the interrupt count value of the previous diagnosis period, it indicates that the interrupt count value has not changed, and the PWM control signal has stopped, it is determined that the interrupt signal of the fan is abnormal.
S150, judging that the cooling system has fan open circuit fault.
And under the conditions that the working current of each fan of the heat dissipation system is smaller than a preset current threshold value and the interrupt signal of each fan is abnormal, judging that the heat dissipation system has a fan open-circuit fault.
Optionally, in this case, a failure prompt message may be further output to prompt the user that the cooling system is in a failure state.
And S160, judging that the cooling system is normal.
And when the working current of the at least one fan is larger than or equal to the preset current threshold value or the interrupt signal of the at least one fan is normal, judging that the heat dissipation system is normal.
In summary, according to the fault diagnosis method for the heat dissipation system provided by the invention, the fault diagnosis process is realized based on two factors, namely the working current and the control signals of the fans, and the fault diagnosis is simultaneously performed by combining the control signals of the fans in the heat dissipation system on the basis of collecting the working current of the fans of the heat dissipation system.
Furthermore, compared with the method for reducing the error diagnosis probability by improving the current characteristic of the fan by using high-performance hardware in the prior art, the method has the advantages that the hardware cost is not increased, the hardware resource of the controller is not excessively occupied, and the stable operation of the heat dissipation system is facilitated.
Optionally, referring to fig. 3, fig. 3 is a flowchart of a method for checking a fault of a heat dissipation system according to an embodiment of the present invention, where the flow of the method for checking a fault may include:
and S200, acquiring a starting instruction.
Alternatively, an alternative implementation of S200 may be implemented with reference to S100 in the embodiment shown in fig. 1, and will not be repeated here.
S210, responding to the starting instruction, and controlling the cooling system to be in a target verification mode.
In order to verify a diagnosis result, the embodiment of the present invention provides multiple preset verification modes, and in any one of the preset verification modes, the connection state of each fan in the heat dissipation system is clearly defined, the target verification mode mentioned in this step may be one or more of the multiple preset verification modes, in practical application, the specific number of the target verification modes is determined according to the verification requirement in the practical verification process, which is not limited by the present invention.
Optionally, the plurality of preset verification modes at least include: the system comprises a first check mode in which the interrupt count value corresponding to each fan changes according to a fixed period, a second check mode in which the interrupt count value corresponding to at least one fan in each fan does not change according to the fixed period, and a third check mode in which the interrupt count value corresponding to each fan does not change.
Wherein, for the second check mode, based on the difference of the number of the fans in the off state, the second check mode can be further subdivided into a plurality of check modes, and the second check mode is not expanded.
Taking the circuit structure of the heat dissipation system shown in fig. 2 as an example, the target verification mode may be a mode in which both the back fan and the seat fan are in an open circuit, a mode in which either the back fan or the seat fan is in an open circuit, or a mode in which both the back fan and the seat fan are in normal connection.
S220, obtaining an actual diagnosis result for diagnosing the heat dissipation system according to the heat dissipation system fault diagnosis method and an expected diagnosis result corresponding to the target verification mode.
As can be known from the execution process of the embodiment shown in fig. 1, after the fan start instruction is issued, the controller diagnoses the cooling system according to the cooling system fault diagnosis method provided in the embodiment shown in fig. 1, and obtains a corresponding actual diagnosis result.
Further, for the determined heat dissipation system, each preset check mode is established in advance, and the expected diagnosis result corresponding to the preset check mode is also known naturally.
And S230, judging whether the actual diagnosis result is consistent with the expected diagnosis result, and if so, executing S240.
After the actual diagnosis result and the expected diagnosis result corresponding to the target verification pattern are obtained, whether the two are consistent or not is compared, if so, S240 is executed, and if not, it may be determined that the actual diagnosis result is inaccurate.
And S240, judging that the actual diagnosis result is valid.
In the case where the actual diagnosis result coincides with the expected diagnosis result, the actual diagnosis result is determined to be valid.
In summary, the method for checking the fault of the heat dissipation system provided by the embodiment of the invention can check the validity of the fault diagnosis result, is beneficial to providing a more reliable diagnosis result for a user, and provides a reference basis for whether the user adopts the diagnosis result.
The cooling system fault diagnosis device provided in the embodiment of the present invention is introduced below, and the cooling system fault diagnosis device described below may be regarded as a functional module architecture that needs to be set in a central device to implement the cooling system fault diagnosis method provided in the embodiment of the present invention; the following description may be cross-referenced with the above.
Referring to fig. 4, fig. 4 is a block diagram of a fault diagnosis device for a heat dissipation system according to an embodiment of the present invention, where the fault diagnosis device for a heat dissipation system according to the embodiment is applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, and the fault diagnosis device for a heat dissipation system includes:
a first obtaining unit 10, configured to obtain an opening instruction of a plurality of fans included in a heat dissipation system;
an output unit 20 for outputting a PWM control signal to at least one of the fans in response to a turn-on instruction;
a monitoring unit 30 for monitoring the operating current of each fan and the interrupt signal of each fan;
wherein, the interrupt signal is triggered by a PWM feedback signal jumping synchronously with a PWM control signal of the corresponding fan;
the first determining unit 40 is configured to determine that a fan open-circuit fault exists in the heat dissipation system when the operating current of each fan is smaller than the preset current threshold and the interrupt signal of each fan is abnormal.
Optionally, the first determining unit 40 is configured to determine whether an interrupt signal of the fan is abnormal, and includes:
counting the duration of the interruption signal of the fan which is not detected to obtain a first duration;
and if the first duration reaches a first duration threshold, judging that the interrupt signal of the fan is abnormal.
Optionally, the first determining unit 40 is configured to determine that the heat dissipation system is normal if the working current of the at least one fan is greater than or equal to a preset current threshold, or an interrupt signal of the at least one fan is normal.
Optionally, referring to fig. 5, fig. 5 is a block diagram of another fault diagnosis device for a heat dissipation system according to an embodiment of the present invention, and on the basis of the embodiment shown in fig. 4, the device further includes:
a first configuration unit 50, configured to set an interrupt function of the heat dissipation controller to count interrupts triggered by the interrupt signal.
Optionally, the first determining unit 40 is configured to determine whether an interrupt signal of the fan is abnormal, and includes:
acquiring an interrupt count value of an interrupt function corresponding to the fan according to a preset diagnosis period;
and if the interrupt count value of the current diagnosis period is the same as the interrupt count value of the previous diagnosis period, judging that the interrupt signal of the fan is abnormal.
Optionally, referring to fig. 6, fig. 6 is a block diagram of a structure of a further cooling system fault diagnosis device according to an embodiment of the present invention, and on the basis of the embodiment shown in fig. 4, the device further includes:
and a second configuration unit 60, configured to configure the feedback port of the heat dissipation controller to interrupt the extraction, where the interrupt is triggered by a rising edge of the level.
The following introduces a cooling system fault checking apparatus provided in the embodiment of the present invention, and the cooling system fault checking apparatus described below may be regarded as a functional module architecture that needs to be set in a central device to implement the cooling system fault checking method provided in the embodiment of the present invention; the following description may be cross-referenced with the above.
Referring to fig. 7, fig. 7 is a block diagram of a heat dissipation system fault checking device according to an embodiment of the present invention, where the heat dissipation system fault checking device according to the embodiment of the present invention is applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, and the device includes:
a second obtaining unit 70, configured to obtain an opening instruction;
a control unit 80, configured to respond to the start instruction and control the heat dissipation system to be in a target verification mode;
the target verification mode comprises at least one of a plurality of preset verification modes of the heat dissipation system, and any preset verification mode comprises the communication state of each fan;
a third obtaining unit 90, configured to obtain an actual diagnosis result obtained by diagnosing the heat dissipation system according to the heat dissipation system fault diagnosis method of any one of the first aspects of the present invention, and an expected diagnosis result corresponding to the target verification mode;
and a second judging unit 100, configured to judge that the actual diagnosis result is valid if the actual diagnosis result is consistent with the expected diagnosis result.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A cooling system fault diagnosis method is applied to a cooling controller of a cooling system comprising a plurality of fans, and comprises the following steps:
acquiring starting instructions of a plurality of fans included in the heat dissipation system;
responding to the starting instruction, and outputting a PWM control signal to at least one of the fans;
monitoring the working current of each fan and the interrupt signal of each fan;
wherein the interrupt signal is triggered by a PWM feedback signal that jumps in synchronization with a PWM control signal of the corresponding fan;
and under the conditions that the working current of each fan is smaller than a preset current threshold value and the interrupt signal of each fan is abnormal, judging that the heat dissipation system has fan open-circuit fault.
2. The heat dissipation system fault diagnosis method according to claim 1, further comprising:
and setting an interrupt function of the heat dissipation controller to count the interrupt triggered by the interrupt signal.
3. The method for diagnosing a failure in a heat dissipation system as claimed in claim 2, wherein the step of determining whether the interrupt signal of the fan is abnormal includes:
acquiring an interrupt count value of an interrupt function corresponding to the fan according to a preset diagnosis period;
and if the interrupt count value of the current diagnosis period is the same as the interrupt count value of the previous diagnosis period, judging that the interrupt signal of the fan is abnormal.
4. The method for diagnosing a failure in a heat dissipation system as claimed in claim 1, wherein the step of determining whether the interrupt signal of the fan is abnormal includes:
counting the duration of the interruption signal of the fan which is not detected to obtain a first duration;
and if the first duration reaches a first duration threshold, judging that the interrupt signal of the fan is abnormal.
5. The method as claimed in any one of claims 1 to 4, wherein if the operating current of at least one of the fans is greater than or equal to the predetermined current threshold, or if the interrupt signal of at least one of the fans is normal, it is determined that the heat dissipation system is normal.
6. The cooling system fault diagnosis method according to any one of claims 1 to 4, further comprising: configuring a feedback port of the heat dissipation controller to interrupt the extraction, wherein the interruption is triggered by a level rising edge.
7. A heat dissipation system fault checking method is applied to a heat dissipation controller of a heat dissipation system comprising a plurality of fans, and comprises the following steps:
acquiring a starting instruction;
responding to the starting instruction, and controlling the cooling system to be in a target verification mode;
the target verification mode comprises at least one of a plurality of preset verification modes of the heat dissipation system, and any preset verification mode comprises a communication state of each fan;
acquiring an actual diagnosis result of the heat dissipation system diagnosed by the heat dissipation system fault diagnosis method according to any one of claims 1 to 6, and an expected diagnosis result corresponding to the target verification mode;
and if the actual diagnosis result is consistent with the expected diagnosis result, judging that the actual diagnosis result is valid.
8. The heat dissipation system fault checking method of claim 7, wherein the plurality of preset checking modes comprise:
a first check mode in which the interrupt count value corresponding to each fan changes according to a fixed period;
a second check mode in which an interrupt count value corresponding to at least one of the fans does not change according to a fixed period;
and a third verification mode in which the interrupt count value corresponding to each fan is unchanged.
9. A heat dissipation system failure diagnosis apparatus applied to a heat dissipation controller of a heat dissipation system including a plurality of fans, the apparatus comprising:
the first acquisition unit is used for acquiring opening instructions of a plurality of fans included in the heat dissipation system;
an output unit for outputting a PWM control signal to at least one of the fans in response to the turn-on instruction;
the monitoring unit monitors the working current of each fan and the interrupt signal of each fan;
wherein the interrupt signal is triggered by a PWM feedback signal that jumps in synchronization with a PWM control signal of the corresponding fan;
the first judging unit is used for judging that the heat dissipation system has fan open-circuit faults under the conditions that the working current of each fan is smaller than a preset current threshold value and the interrupt signal of each fan is abnormal.
10. A heat dissipation system fault verification device is applied to a heat dissipation controller of a heat dissipation system comprising a plurality of fans, and comprises:
the second acquisition unit is used for acquiring a starting instruction;
the control unit is used for responding to the starting instruction and controlling the heat dissipation system to be in a target verification mode;
the target verification mode comprises at least one of a plurality of preset verification modes of the heat dissipation system, and any preset verification mode comprises a communication state of each fan;
a third obtaining unit, configured to obtain an actual diagnosis result of diagnosing the heat dissipation system according to the heat dissipation system fault diagnosis method of any one of claims 1 to 6, and an expected diagnosis result corresponding to the target verification mode;
and the second judging unit is used for judging that the actual diagnosis result is valid if the actual diagnosis result is consistent with the expected diagnosis result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111424489.1A CN114137347A (en) | 2021-11-26 | 2021-11-26 | Fault diagnosis method, calibration method and device for heat dissipation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111424489.1A CN114137347A (en) | 2021-11-26 | 2021-11-26 | Fault diagnosis method, calibration method and device for heat dissipation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114137347A true CN114137347A (en) | 2022-03-04 |
Family
ID=80388700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111424489.1A Pending CN114137347A (en) | 2021-11-26 | 2021-11-26 | Fault diagnosis method, calibration method and device for heat dissipation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114137347A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609127A (en) * | 2009-07-24 | 2009-12-23 | 美的集团有限公司 | Relay fault detection circuit |
| JP2010137327A (en) * | 2008-12-11 | 2010-06-24 | Toyota Motor Corp | Cutting device, cutting blade projection adjusting tool, and cutting blade projection adjusting method |
| CN102322329A (en) * | 2011-08-17 | 2012-01-18 | 上海三一重机有限公司 | Intelligent control method of engine cooling fan for engineering machinery |
| CN202424609U (en) * | 2011-12-29 | 2012-09-05 | 万向钱潮股份有限公司 | Current drive control device of electromagnetic coil |
| CN104863684A (en) * | 2015-06-09 | 2015-08-26 | 北汽福田汽车股份有限公司 | Vehicle and monitoring method and monitoring system of cooling fan motor of vehicle |
| CN204591741U (en) * | 2015-01-15 | 2015-08-26 | 常州剑湖金城车辆设备有限公司 | Electric heater alarm circuit for failure of fan used for rail vehicle |
| CN105974252A (en) * | 2016-07-29 | 2016-09-28 | 北京经纬恒润科技有限公司 | PWM output fault diagnosis method and system |
| CN108173466A (en) * | 2017-12-06 | 2018-06-15 | 深圳市显控科技股份有限公司 | A kind of motor drive control method and its system |
| CN210484156U (en) * | 2019-08-09 | 2020-05-08 | 苏州浪潮智能科技有限公司 | Server fan and BMC fault monitoring circuit based on CPLD |
| CN112987678A (en) * | 2019-12-13 | 2021-06-18 | 广州汽车集团股份有限公司 | PWM control type water pump fault diagnosis method and system and automobile |
| CN214539824U (en) * | 2021-01-20 | 2021-10-29 | 徐州威卡电子控制技术有限公司 | PWM output fault diagnosis circuit |
-
2021
- 2021-11-26 CN CN202111424489.1A patent/CN114137347A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010137327A (en) * | 2008-12-11 | 2010-06-24 | Toyota Motor Corp | Cutting device, cutting blade projection adjusting tool, and cutting blade projection adjusting method |
| CN101609127A (en) * | 2009-07-24 | 2009-12-23 | 美的集团有限公司 | Relay fault detection circuit |
| CN102322329A (en) * | 2011-08-17 | 2012-01-18 | 上海三一重机有限公司 | Intelligent control method of engine cooling fan for engineering machinery |
| CN202424609U (en) * | 2011-12-29 | 2012-09-05 | 万向钱潮股份有限公司 | Current drive control device of electromagnetic coil |
| CN204591741U (en) * | 2015-01-15 | 2015-08-26 | 常州剑湖金城车辆设备有限公司 | Electric heater alarm circuit for failure of fan used for rail vehicle |
| CN104863684A (en) * | 2015-06-09 | 2015-08-26 | 北汽福田汽车股份有限公司 | Vehicle and monitoring method and monitoring system of cooling fan motor of vehicle |
| CN105974252A (en) * | 2016-07-29 | 2016-09-28 | 北京经纬恒润科技有限公司 | PWM output fault diagnosis method and system |
| CN108173466A (en) * | 2017-12-06 | 2018-06-15 | 深圳市显控科技股份有限公司 | A kind of motor drive control method and its system |
| CN210484156U (en) * | 2019-08-09 | 2020-05-08 | 苏州浪潮智能科技有限公司 | Server fan and BMC fault monitoring circuit based on CPLD |
| CN112987678A (en) * | 2019-12-13 | 2021-06-18 | 广州汽车集团股份有限公司 | PWM control type water pump fault diagnosis method and system and automobile |
| CN214539824U (en) * | 2021-01-20 | 2021-10-29 | 徐州威卡电子控制技术有限公司 | PWM output fault diagnosis circuit |
Non-Patent Citations (1)
| Title |
|---|
| 孙超;邱颖宁;冯延晖;: "基于SVPWM扇区号的三相变流器开路故障诊断", 电力工程技术, no. 02, 28 March 2020 (2020-03-28), pages 185 - 192 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7612464B2 (en) | Electronic control system with malfunction monitor | |
| CN108700875A (en) | Vehicular diagnostic method, system, equipment and computer readable storage medium | |
| US8650003B2 (en) | Validation process for fault detection of a device | |
| JP2011078164A (en) | Voltage monitor | |
| CN112034818B (en) | Controller fault analysis method and system | |
| CN107659465B (en) | Device and method for checking error frames of CAN (controller area network) bus of whole vehicle | |
| CN110955571B (en) | Fault management system for functional safety of vehicle-specification-level chip | |
| CN114839949A (en) | Vehicle fault online diagnosis method and system | |
| US8676353B2 (en) | Control system | |
| CN114137347A (en) | Fault diagnosis method, calibration method and device for heat dissipation system | |
| EP2479672B1 (en) | Vehicle electronic control device | |
| CN111537916B (en) | Voltage sampling chip power supply ground disconnection fault diagnosis method, device and equipment | |
| CN112356818B (en) | Function safety monitoring method for range extender control system | |
| CN113507487B (en) | CAN communication safety detection method and device, electronic equipment and vehicle | |
| CN114415646B (en) | Remote vehicle diagnosis method, system and terminal equipment based on DoIP protocol | |
| CN108279663A (en) | The control system and control method of vehicle error signal, storage medium | |
| JP6979630B2 (en) | Monitoring equipment, monitoring methods and programs | |
| CN114756008A (en) | Fault injection system, automatic test system and method for automobile hybrid bus integrated rack | |
| CN114170705A (en) | Vehicle data uploading method, device and equipment | |
| CN110371055B (en) | Analysis method and device for automobile power supply signal | |
| KR20130008702A (en) | Apparatus for monitoring vehicles | |
| CN115328080B (en) | Fault detection method, device, vehicle and storage medium | |
| CN112751822B (en) | Communication apparatus, operation method, abnormality determination apparatus, abnormality determination method, and storage medium | |
| CN114076900B (en) | Battery diagnosis device, battery diagnosis method, computer-readable non-transitory storage medium, and vehicle | |
| CN111376888A (en) | Switch station identification method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |