CN101782590B - Method and system for detecting fan fault of electric and electronic products - Google Patents
Method and system for detecting fan fault of electric and electronic products Download PDFInfo
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Abstract
The invention relates to a method and a system for detecting a fan fault of an electric power and electronic product, and the system comprises a pulse feedback module for generating corresponding output pulse according to the operation of a fan, a counting treatment module for calculating the quantity of the output pulse in a preset period so as to judge whether a fault exists in the fan, and a pre-treatment unit. By implementing the method and the system for detecting the fan fault of the electric power and electronic product in the invention, fan fault detection misinformation of the electric power and electronic product is not generated due to fan revolution change caused by change of grid voltage at some time, thus enhancing grid adaptability. As the system is applied to high powder equipment with strong electromagnetic interference, pre-treatment is carried out on the output pulse (the pre-treatment contents consist of detecting and judging the width of the output pulse, detecting and judging the time interval of adjacent output pulses, and performing shaping and filtering treatment.), thus avoiding the influence of interference pulse on fan pulse in the operation process of the fan and improving the system detection precision and accuracy.
Description
Technical field
The present invention relates to the blower fan detection technique, more particularly, relate to a kind of fan trouble detection method and system of power electronic product.
Background technology
Widely apply blower fan to dispel the heat in the current power electronic product, (stall or rotating speed are abnormal), can have a strong impact on the heat radiation of device when blower fan breaks down, and shortened device lifetime, heavy device failure is necessary so blower fan is carried out fault detect.In current production, be mainly the rotating speed that detects blower fan, judge by rotating speed whether blower fan breaks down.Its defective mainly contains following 2 points: (1) antijamming capability is poor, is difficult to use on powerful device; (2) grid adaptability is poor, and when power network fluctuation, rotation speed change is easily reported fault by mistake.
Summary of the invention
The technical problem to be solved in the present invention is, in detecting for the fan trouble of the power electronic product of prior art, existing antijamming capability is poor, is difficult to use on powerful device; Grid adaptability is poor, and when power network fluctuation, rotation speed change is easily reported the defectives such as fault by mistake, and a kind of fan trouble detection method and system of power electronic product is provided.
The present invention solves the problems of the technologies described above the technical scheme that adopts: the fan trouble detection method of a kind of power electronic product of structure, and operation one every according to described blower fan turns, and produces an output pulse; In a Preset Time, the quantity of counting output pulse, and the rotating speed current according to blower fan are calculated the absolute value of difference of the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby are judged whether described blower fan breaks down.
In the fan trouble detection method of power electronic product of the present invention, before the quantity of counting output pulse, also comprise the width threshold value is set, the width of described width threshold value and current output pulse is compared, whether judging this output pulse as disturbing pulse, thereby determine whether counting is exported in this output pulse.
In the fan trouble detection method of power electronic product of the present invention, the disturbing pulse width that the electromagnetic environment of minimum output pulse width corresponding according to the blower fan maximum speed and the current operation of blower fan produces, described width threshold value is set so that described width threshold value greater than the width of disturbing pulse less than or equal to minimum output pulse width.
In the fan trouble detection method of power electronic product of the present invention, before the quantity of counting output pulse, also comprise the time interval threshold value that arranges between adjacent output pulse, the time interval between this time interval threshold value and current output pulse and last output pulse is compared, whether judging described output pulse as disturbing pulse, thereby determine whether counting is exported in this output pulse.
In the fan trouble detection method of power electronic product of the present invention, minimum output pulse interval corresponding according to the blower fan maximum speed, described time interval threshold value is set, so that described time interval threshold value is exported pulse interval less than minimum.
In the fan trouble detection method of power electronic product of the present invention, before the quantity of calculating the output pulse, comprise that also shaping filter is carried out in the output pulse to be processed.
According to another aspect of the present invention, provide a kind of fan trouble detection system of power electronic product, it comprises:
The pulse feedback module is used for operation one every according to described blower fan and turns, and produces an output pulse;
The counting processing module, be used in a Preset Time quantity of counting output pulse, and the rotating speed current according to blower fan, calculate the absolute value of difference of the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby judge whether described blower fan breaks down.
In the fan trouble detection system of power electronic product of the present invention, also comprise pretreatment unit, it is used for receiving the output pulse of described pulse feedback module generation and should exporting pulse and carry out sending to the counting processing module after pre-service, and described pretreatment unit comprises:
The width detection module, it is used for arranging the width threshold value, the width of described width threshold value and current output pulse is compared, to judge that whether this output pulse is as disturbing pulse, thereby determine whether this output pulse is outputed to the counting processing module, export counting.
In the fan trouble detection system of power electronic product of the present invention, the disturbing pulse width that the electromagnetic environment of minimum output pulse width corresponding according to the blower fan maximum speed and the current operation of blower fan produces, described width threshold value is set so that described width threshold value greater than the width of disturbing pulse less than or equal to minimum output pulse width.
In the fan trouble detection system of power electronic product of the present invention, described pretreatment unit also comprises:
The time detecting module, it is used for arranging the time interval threshold value between adjacent output pulse, the time interval between this time interval threshold value and current output pulse and last output pulse is compared, whether judging described output pulse as disturbing pulse, thereby determine whether counting is exported in this output pulse.
In the fan trouble detection system of power electronic product of the present invention, minimum output pulse interval corresponding according to the blower fan maximum speed arranges described time interval threshold value, so that it exports pulse interval less than minimum.
In the fan trouble detection system of power electronic product of the present invention, described pretreatment unit also comprises:
The shaping filter module was used for before the quantity of calculating the output pulse, carried out the shaping filter processing to going out pulse.
Implement fan trouble detection method and the system of power electronic product of the present invention, has following beneficial effect: by the counting output pulse corresponding with fan operation, thereby the rotation speed of fan that can not cause because of the variation of a certain moment line voltage changes, make the fan trouble of power electronic product detect the wrong report fault, strengthened grid adaptability.Owing to being applied in powerful device, electromagnetic interference (EMI) is strong, therefore pre-service is carried out in the output pulse, in preprocessing process, the width threshold value of output pulse can be set, and detect take this and whether judge current output pulse as disturbing pulse, thereby determine whether that this output pulse is outputed to the counting processing module carries out statistical counting; Time interval threshold value between adjacent output pulse can also be set in addition, and detect take this and whether judge current output pulse as disturbing pulse, thereby determine whether that this output pulse is outputed to technology modules carries out statistical counting; Again further, can also shaping filter be carried out in the output pulse process, thereby avoid the impact of the disturbing pulse in the fan operation on the blower fan pulse in pre-service, improved system's accuracy of detection and correctness.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the theory diagram of the fan trouble detection system of power electronic product of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, in blower fan 1 fault detection system of the present invention, it mainly comprises three parts, the blower fan 1 that namely connects in turn, pulse feedback module 2, and counting processing module 4, in addition, in a further embodiment, also can between pulse feedback module 2 and counting processing module 4, pretreatment unit 3 be set.Should be noted that the present invention illustrate in annexation between each equipment be needs for clear its information interaction of explaination and control procedure, therefore should be considered as annexation in logic, and should not only limit to physical connection.
at work, blower fan 1 powers on and moves, pulse feedback module 2 operation one every according to blower fan 1 simultaneously turns, correspondingly produce an output pulse, export the quantity of pulse by counting processing module 4 counting of (for example 20 seconds) in a Preset Time again, simultaneously current according to blower fan 1 rotating speed, obtain the operation revolution of this Preset Time inner blower 1, then calculate the absolute value of quantity and the difference between the operation revolution of output pulse, and judge that this absolute value is whether in a preset value scope, represent that namely this result of calculation is in the error range that allows, if this absolute value is in this preset value scope the time, indicate that this blower fan 1 is in normal operating conditions, if this absolute value is not in this preset value scope the time, indicate that this blower fan 1 is in the abnormal work state, count processing module 4 and will export the fault detect result this moment, expression blower fan 1 has broken down,, the advantage of doing like this is, blower fan 1 rotation speed change that can not cause because of the variation of a certain moment line voltage, make blower fan 1 fault detect wrong report fault, strengthened grid adaptability.
In addition, the blower fan 1 related due to the technical program generally is applied in powerful device, and electromagnetic interference (EMI) is strong, there is stronger disturbing pulse, therefore technical scheme of the present invention further, for the impact of disturbing pulse on blower fan 1 output pulse, has been carried out pre-service to the output pulse.
In embodiment as shown in Figure 1, mainly to increase pretreatment unit 3 between pulse feedback module 2 and counting processing module 4, the output pulse that this pretreatment unit 3 sends received pulse feedback module 2 is to carry out pre-service, thereby again to the 4 pretreated output pulses of output of counting processing module, this pretreatment unit 3 can carry out multiple pre-service to the output pulse, system is detected to avoid interference pulse the impact that is produced.
In a preferred embodiment, pretreatment unit 3 comprises width detection module 31, two functions of these width detection module 31 main execution, at first the width threshold value of output pulse is set, so that output pulse and disturbing pulse difference can be come, thereby avoids when disturbing pulse is not in the output pulse, be that disturbing pulse is between the output pulse, can prevent from disturbing pulse being counted as the output pulse by mistake, thereby mistake of statistics occur, cause detecting error.when specific design, the disturbing pulse width that the electromagnetic environment of minimum output pulse width corresponding according to blower fan 1 maximum speed and blower fan 1 current operation produces, the width threshold value is set, so that its greater than the width of disturbing pulse less than or equal to minimum output pulse width, secondly after pretreatment module receives the output pulse, output pulse and the width threshold value of current acquisition are compared, if the width of this output pulse and this width threshold value are complementary, just can determine that it is the output pulse of blower fan 1, should export with that pulse and output to counting processing module 4, carry out statistical counting by counting processing module 4, if the width that should export pulse just can determine that much smaller than this width threshold value it is disturbing pulse, thereby just current pulse signal can be filtered, not output to counting processing module 4, realize thus exporting pulse and the good difference of disturbing pulse.
In another preferred embodiment, pretreatment unit 3 also comprises time detecting module 32, this time detecting module 32 also mainly comprises two functions, at first, time interval threshold value between adjacent output pulse is set, thereby avoid when disturbing pulse is positioned in the output pulse, an output pulse can be divided into a plurality of pulse signals, thereby prevent an output pulse as a plurality of output step-by-step countings.when specific design, minimum output pulse interval corresponding according to blower fan 1 maximum speed, threshold value sets interval, so that it exports pulse interval less than minimum, then in the process that receives the output pulse, secondly, calculate the time interval between the current output pulse that obtains and the previous output pulse that has been defined as non-disturbing pulse, further, again should the time interval and time interval threshold value compare, if both are complementary, can judge that current output pulse is not disturbing pulse, just this output pulse can be outputed to counting processing module 4, carry out statistical counting by counting processing module 4, otherwise, if should the time interval much smaller than the time interval during threshold value, the output pulse that can judge current acquisition is disturbing pulse, just it can be filtered out, do not output to counting processing module 4, realized thus identifying an output pulse of multistage that disturbed pulse is divided into.
In another preferred embodiment, shaping filter module 33 is set further in pretreatment unit 3, it is used for that shaping filter is carried out in the output pulse and processes.
This shows, the pretreatment unit 3 in technical solution of the present invention can carry out tertiary treatment to the output pulse by the three functions module, to avoid interference the impact of pulse.But understandable, not needing to carry out strict priority for the processing of width detection module 31, time detecting module 32 and 33 pairs of output pulses of shaping filter module in pretreatment unit 3 sets, can can carry out according to actual needs the pre-service of a kind of function, two kinds of functions or three kinds of functions to the output pulse to the output pulse simultaneously, can as the case may be, arrange flexibly.
Experiment for above technical scheme, select the R2E225BD9219 model blower fan 1 of embpapst, during power supply 230V/50Hz, rotating speed 2650/min, this moment, blower fan 1 output pulse frequency was 44Hz, judge whether fault of blower fan 1 with the count values of 20 seconds, the count value of 20 seconds should be 880 in theory, and the actual count value that obtains is 879, this shows that its accuracy of detection is higher, the absolute value of both differences is only 1 in addition, this shows blower fan 1 normal operation.
The present invention describes by several specific embodiments, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, for particular condition or concrete condition, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole embodiments that fall in claim scope of the present invention.
Claims (8)
1. the fan trouble detection method of a power electronic product, is characterized in that, operation one every according to described blower fan turns, and produces an output pulse; In a Preset Time, the quantity of counting output pulse, and the rotating speed current according to blower fan are calculated the absolute value of difference of the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby are judged whether described blower fan breaks down;
Before the quantity of counting output pulse, also comprise the width threshold value is set, the width of described width threshold value and current output pulse is compared, whether judging this output pulse as disturbing pulse, thereby determine whether counting is exported in this output pulse.
2. the fan trouble detection method of power electronic product according to claim 1, it is characterized in that, the disturbing pulse width that the electromagnetic environment of minimum output pulse width corresponding according to the blower fan maximum speed and the current operation of blower fan produces, described width threshold value is set so that described width threshold value greater than the width of disturbing pulse less than or equal to minimum output pulse width.
3. the fan trouble detection method of power electronic product according to claim 1, it is characterized in that, before the quantity of counting output pulse, also comprise the time interval threshold value that arranges between adjacent output pulse, the time interval between this time interval threshold value and current output pulse and last output pulse is compared, whether judging described output pulse as disturbing pulse, thereby determine whether counting is exported in this output pulse.
4. the fan trouble detection method of power electronic product according to claim 3, it is characterized in that, minimum output pulse interval corresponding according to the blower fan maximum speed, described time interval threshold value is set, so that described time interval threshold value is exported pulse interval less than minimum.
5. the fan trouble detection method of power electronic product according to claim 1, is characterized in that, before the quantity of calculating the output pulse, comprises that also shaping filter is carried out in the output pulse to be processed.
6. the fan trouble detection system of a power electronic product, is characterized in that, comprising:
The pulse feedback module is used for operation one every according to described blower fan and turns, and produces an output pulse;
The counting processing module, be used in a Preset Time quantity of counting output pulse, and the rotating speed current according to blower fan, calculate the absolute value of difference of the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby judge whether described blower fan breaks down;
Also comprise pretreatment unit, it is used for receiving the output pulse of described pulse feedback module generation and should exporting pulse and carry out sending to the counting processing module after pre-service, and described pretreatment unit comprises:
The width detection module, the disturbing pulse width that its electromagnetic environment that is used for minimum output pulse width corresponding according to the blower fan maximum speed and the current operation of blower fan produces, the width threshold value is set, the width of described width threshold value and current output pulse is compared, to judge that whether this output pulse is as disturbing pulse, thereby determine whether this output pulse is outputed to the counting processing module, export counting, described width threshold value greater than the width of disturbing pulse less than or equal to minimum output pulse width.
7. the fan trouble detection system of power electronic product according to claim 6, is characterized in that, described pretreatment unit also comprises:
The time detecting module, it is used for minimum output pulse interval corresponding according to the blower fan maximum speed, threshold value sets interval, the time interval between this time interval threshold value and current output pulse and last output pulse is compared, to judge that whether described output pulse is as disturbing pulse, thereby determine whether counting is exported in this output pulse, described time interval threshold value is exported pulse interval less than minimum.
8. the fan trouble detection system of power electronic product according to claim 7, is characterized in that, described pretreatment unit also comprises:
The shaping filter module was used for before the quantity of calculating the output pulse, carried out the shaping filter processing to going out pulse.
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| CN 200910189570 CN101782590B (en) | 2009-11-27 | 2009-11-27 | Method and system for detecting fan fault of electric and electronic products |
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| CN 200910189570 CN101782590B (en) | 2009-11-27 | 2009-11-27 | Method and system for detecting fan fault of electric and electronic products |
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| CN106161732B (en) * | 2015-03-26 | 2020-02-21 | 联想(北京)有限公司 | Control method and device and electronic equipment |
| CN105141196B (en) * | 2015-08-04 | 2018-07-24 | 西北工业大学 | Photoelectric-isolated high-power brushless DC electric machine drive apparatus and drive feedback processing method |
| CN106681190B (en) * | 2016-12-29 | 2020-04-03 | 北京经纬恒润科技有限公司 | Filtering method and device |
| CN107255351B (en) * | 2017-06-28 | 2019-08-30 | 广东美的暖通设备有限公司 | Rotation speed of fan control method, rotation speed of fan control system and air-conditioning |
| CN110781045B (en) * | 2019-10-24 | 2023-07-14 | 超越科技股份有限公司 | CPU IO interrupt performance testing device based on FPGA |
| CN110986728A (en) * | 2019-12-18 | 2020-04-10 | 常州市新创智能科技有限公司 | Gear meter counting device and meter counting method |
| CN114814265A (en) * | 2022-05-06 | 2022-07-29 | 阮翔 | Non-contact real-time detection method for fan in high-frequency interference environment |
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