CN101782590A - Method and system for detecting fan fault - Google Patents
Method and system for detecting fan fault Download PDFInfo
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Abstract
本发明涉及一种风机故障检测方法及系统，该系统包括脉冲反馈模块，用于根据所述风机的运行，产生相应的输出脉冲；计数处理模块，用于在一预设时间内，计算输出脉冲的数量，以判断所述风机是否出现故障；及预处理单元。实施本发明的风机故障检测方法及系统不会因为某一时刻电网电压的变化引起的风机转速变化，使风机故障检测误报故障，增强了电网适应性。由于应用在大功率设备中，电磁干扰强，因此对输出脉冲进行预处理(检测判断输出脉冲的宽度，检测判断相邻的输出脉冲的时间间隔，并进行整形滤波处理)，从而避免了风机运行中的干扰脉冲对风机脉冲的影响，提高了系统检测精度和正确性。
The invention relates to a fan fault detection method and system. The system includes a pulse feedback module for generating corresponding output pulses according to the operation of the fan; a counting processing module for calculating output pulses within a preset time to determine whether the blower is faulty; and a preprocessing unit. The fan fault detection method and system implemented in the present invention will not cause the fan fault detection to falsely report the fault due to the change of the fan speed caused by the change of the grid voltage at a certain moment, thereby enhancing the adaptability of the grid. Because it is used in high-power equipment, the electromagnetic interference is strong, so the output pulse is preprocessed (detecting and judging the width of the output pulse, detecting and judging the time interval of adjacent output pulses, and performing shaping and filtering processing), thus avoiding the fan running The influence of the interference pulse in the fan pulse on the fan pulse improves the detection accuracy and correctness of the system.
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.
Background technology
Widely apply blower fan to dispel the heat in the current power electronic product, (stall or rotating speed are unusual) can have a strong impact on the heat radiation of device when blower fan breaks down, and shortened device lifetime, and be heavy then device failure is necessary so blower fan is carried out fault detect.In the current production, mainly be 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 reported fault easily by mistake.
Summary of the invention
The technical problem to be solved in the present invention is, existing antijamming capability is poor in detecting at the fan trouble of prior art, is difficult to use on powerful device; Grid adaptability is poor, and when power network fluctuation, rotation speed change is reported defectives such as fault easily by mistake, and a kind of fan trouble detection method and system are provided.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: construct a kind of fan trouble detection method, every operation one is changeed according to described blower fan, produces an output pulse; In a Preset Time, the quantity of counting output pulse, and the rotating speed current according to blower fan, the absolute value of difference that calculates the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby judge whether described blower fan breaks down.
In fan trouble detection method 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, judging whether this output pulse is disturbing pulse, thereby determine whether counting is exported in this output pulse.
In fan trouble detection method of the present invention, the disturbing pulse width that electromagnetic environment produced according to pairing minimum output pulse width of blower fan maximum speed and the current operation of blower fan, described width threshold value is set so that described width threshold value greater than the width of disturbing pulse smaller or equal to minimum output pulse width.
In fan trouble detection method of the present invention, before the quantity of counting output pulse, also comprise the time interval threshold value that is provided with between the adjacent output pulse, the time interval between this time interval threshold value and current output pulse and the last output pulse is compared, judging whether described output pulse is disturbing pulse, thereby determine whether counting is exported in this output pulse.
In fan trouble detection method of the present invention,, described time interval threshold value is set, so that described time interval threshold value is exported pulse interval less than minimum according to the pairing minimum output pulse interval of blower fan maximum speed.
In fan trouble detection method 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 handled.
According to another aspect of the present invention, provide a kind of fan trouble detection system, it comprises:
The pulse feedback module is used for according to every operation one commentaries on classics of described blower fan, 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, the absolute value of difference that calculates the quantity of output pulse and fan operation revolution whether in a preset value scope, thereby judge whether described blower fan breaks down.
In fan trouble detection system of the present invention, also comprise pretreatment unit, it is used to receive the output pulse of described pulse feedback module generation and should export pulse and carry out sending to the counting processing module after the pre-service, and described pretreatment unit comprises:
The width detection module, it is used to be provided with the width threshold value, the width of described width threshold value and current output pulse is compared, and whether be disturbing pulse to judge this output pulse, thereby determine whether this output pulse is outputed to the counting processing module, export counting.
In fan trouble detection system of the present invention, the disturbing pulse width that electromagnetic environment produced according to pairing minimum output pulse width of blower fan maximum speed and the current operation of blower fan, described width threshold value is set so that described width threshold value greater than the width of disturbing pulse smaller or equal to minimum output pulse width.
In fan trouble detection system of the present invention, described pretreatment unit also comprises:
The time detecting module, it is used to be provided with the time interval threshold value between the adjacent output pulse, the time interval between this time interval threshold value and current output pulse and the last output pulse is compared, judging whether described output pulse is disturbing pulse, thereby determine whether counting is exported in this output pulse.
In fan trouble detection system of the present invention,, described time interval threshold value is set, so that it exports pulse interval less than minimum according to the pairing minimum output pulse interval of blower fan maximum speed.
In fan trouble detection system 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 of the present invention and system, has following beneficial effect: by counting and the corresponding output pulse of fan operation, thereby the rotation speed of fan that can not cause because of the variation of a certain moment line voltage changes, make fan trouble detect the wrong report fault, strengthened grid adaptability.Owing to be applied in the 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 to judge whether current output pulse is disturbing pulse, thereby determine whether that this output pulse is outputed to the counting processing module carries out statistical counting with this; Time interval threshold value between the adjacent output pulse can also be set in addition, and detect to judge whether current output pulse is disturbing pulse, thereby determine whether that this output pulse is outputed to technology modules carries out statistical counting with this; Again further, can also in pre-service, shaping filter be carried out in the output pulse handle, thereby avoid the influence of the disturbing pulse in the fan operation, improved system's accuracy of detection and correctness the blower fan pulse.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the theory diagram of fan trouble detection system of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification 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 i.e. blower fan 1 that 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 is according to blower fan 1 every operation one commentaries on classics simultaneously, 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 rotating speed according to blower fan 1, obtain the operation revolution of this Preset Time inner blower 1, then calculate the absolute value of the 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 promptly this result of calculation is in the error range that allows, if this absolute value in this preset value scope the time, indicates 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, not blower fan 1 rotation speed change that can 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, because the related blower fan 1 of the technical program generally is applied in the powerful device, electromagnetic interference (EMI) is strong, there is stronger disturbing pulse, therefore technical scheme of the present invention at the influence of disturbing pulse to blower fan 1 output pulse, has been carried out pre-service to the output pulse further.
Among the embodiment as shown in Figure 1, mainly be between pulse feedback module 2 and counting processing module 4, to increase pretreatment unit 3, the output pulse that this pretreatment unit 3 sends received pulse feedback module 2 is to carry out pre-service, thereby export through pretreated output pulse to counting processing module 4 again, this pretreatment unit 3 can carry out multiple pre-service to the output pulse, system is detected the influence that is produced to avoid interference pulse.
In a preferred embodiment, pretreatment unit 3 comprises width detection module 31, two functions of these width detection module 31 main execution, the width threshold value of output pulse at first is set,, thereby avoids when disturbing pulse is not in the output pulse so that output pulse and disturbing pulse difference can be come, be that disturbing pulse is between the output pulse, can prevent from disturbing pulse to be counted as the output pulse by mistake, thereby mistake of statistics occur, cause detecting error.When specific design, the disturbing pulse width that electromagnetic environment produced according to pairing minimum output pulse width of blower fan 1 maximum speed and blower fan 1 current operation, the width threshold value is set, so that its greater than the width of disturbing pulse smaller or equal to minimum output pulse width, secondly after pretreatment module receives the output pulse, the 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 pulse with that 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 a disturbing pulse, thereby just current pulse signal can be filtered, not output to counting processing module 4, realize to export pulse and the good difference of disturbing pulse thus.
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 the 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, according to the pairing minimum output pulse interval of 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 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 a 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, can judge that the output pulse of current acquisition is a disturbing pulse, just it can be filtered out, do not output to counting processing module 4, realized identifying an output pulse of multistage that disturbed pulse is divided into thus.
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 handles.
This shows that the pretreatment unit 3 in the technical solution of the present invention can carry out tertiary treatment to the output pulse by three functional modules, to avoid interference the influence of pulse.But it is 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 of shaping filter module pulse in the pretreatment unit 3 sets, can can carry out the pre-service of a kind of function, two kinds of functions or three kinds of functions simultaneously according to actual needs to the output pulse to the output pulse, can be provided with flexibly as the case may be.
Experiment for above technical scheme, select the R2E225BD9219 model blower fan 1 of embpapst for use, 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 20 seconds count value, 20 seconds count value 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 1 only in addition, this shows that blower fan 1 operation is normal.
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, at 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 the claim scope of the present invention.
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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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Cited By (8)
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| CN105141196A (en) * | 2015-08-04 | 2015-12-09 | 西北工业大学 | Photoelectric-isolated high-power brushless direct-current motor drive device and drive feedback processing method |
| CN106161732A (en) * | 2015-03-26 | 2016-11-23 | 联想(北京)有限公司 | A kind of control method, device and electronic equipment |
| CN106681190A (en) * | 2016-12-29 | 2017-05-17 | 北京经纬恒润科技有限公司 | Filtering method and apparatus |
| CN107255351A (en) * | 2017-06-28 | 2017-10-17 | 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 |
| CN110781045A (en) * | 2019-10-24 | 2020-02-11 | 山东超越数控电子股份有限公司 | FPGA-based CPU IO interruption performance testing device |
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| 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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| CN100468036C (en) * | 2005-10-26 | 2009-03-11 | 中国石油大学(北京) | Device and method for detecting failure of engine fuel system |
| CN2867720Y (en) * | 2005-12-08 | 2007-02-07 | 上海神力科技有限公司 | Fan speed stabilizing control circuit for fuel cell engine air delivery device |
| CN101328901A (en) * | 2008-07-25 | 2008-12-24 | 华为技术有限公司 | Apparatus and method for detecting fan fault |
| CN201322753Y (en) * | 2008-10-24 | 2009-10-07 | 比亚迪股份有限公司 | Rotating-speed measuring device |
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| CN106161732A (en) * | 2015-03-26 | 2016-11-23 | 联想(北京)有限公司 | A kind of control method, device and electronic equipment |
| CN105141196A (en) * | 2015-08-04 | 2015-12-09 | 西北工业大学 | Photoelectric-isolated high-power brushless direct-current motor drive device and drive feedback processing method |
| 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 |
| CN106681190A (en) * | 2016-12-29 | 2017-05-17 | 北京经纬恒润科技有限公司 | Filtering method and apparatus |
| CN107255351A (en) * | 2017-06-28 | 2017-10-17 | 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 |
| 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 |
| CN110781045A (en) * | 2019-10-24 | 2020-02-11 | 山东超越数控电子股份有限公司 | FPGA-based CPU IO interruption performance testing device |
| 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 |
| CN114113786A (en) * | 2021-11-19 | 2022-03-01 | 许昌许继软件技术有限公司 | An adaptive key phase pulse acquisition method, system and electronic device |
| CN114113786B (en) * | 2021-11-19 | 2024-11-19 | 许继电气股份有限公司 | Adaptive key phase pulse acquisition method, system and electronic equipment |
| 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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