CN1479087A - Vibration detecting method of heat radiator and its detecting system - Google Patents
Vibration detecting method of heat radiator and its detecting system Download PDFInfo
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- CN1479087A CN1479087A CNA02129223XA CN02129223A CN1479087A CN 1479087 A CN1479087 A CN 1479087A CN A02129223X A CNA02129223X A CN A02129223XA CN 02129223 A CN02129223 A CN 02129223A CN 1479087 A CN1479087 A CN 1479087A
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Abstract
A method and system for testing the vibration of heat radiator is disclosed. Said method includes such steps as fixing the heat radiator to tester, turning on its fan, measuring its rotation speed, transmitting it to control computer for judging if the rotation speed is in allowable range, measuring the vibration signal by acceleration sensor, amplifying, analyzing the signal, transmitting it to control computer for real-time display of FFT vibration spectrum signals, and comparing it with predefined value for judging its vibration and rotation speed of fan are allowable.
Description
Technical field
The present invention relates to a kind of vibration detection field of heating radiator, particularly relate to a kind of detection method and detection system thereof of vibration and rotation speed of the fan monitoring of computing machine cooling radiator.
Background technology
Along with the fast development of computer technology, the heating power of CPU (central processing unit) constantly increases now, and is like this then the heat-sinking capability of cpu heat is had higher requirement.In order to improve the radiating efficiency of cpu heat, the volume of existing heating radiator constantly increases, fan also constantly increases, therefore cause the vibration of heating radiator when work to increase gradually, and the quality of fan quality, heat radiation are checked the difference of the shape of sheet, the mounting means of heating radiator etc. and all can be impacted the magnitude of vibrations of heating radiator when the work.Vibrate big heating radiator in use, can cause the resonance of computer housing, make cabinet produce big vibration, thereby cause computer complete machine noise big, big vibration simultaneously also can influence the operate as normal of computer miscellaneous part; And big vibration reflects that also this heating radiator has potential faults at aspects such as fan quality, heating radiator installations.
The method of the heating radiator of industry check at present vibration is, manually the heating radiator of work is taken the size of judging vibration in the hand, but because staff is only relatively responsive to the vibration below the 100Hz, vibration signal greater than 100Hz is difficult to experience its size, and heating radiator all can cause the resonance of cabinet up to the abnormal vibrations amount of 2000Hz, therefore use staff to check the method for heating radiator magnitude of vibrations can not scientificlly and effectively diagnose the size issue of heating radiator vibration, can not reach the real purpose that detects of heating radiator.
In order to solve the problem of heating radiator method for detecting vibration and detection system thereof, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing heating radiator method for detecting vibration exists, the inventor is actively studied innovation, through constantly studying, designing based on abundant practical experience and professional knowledge, and after studying sample and improvement repeatedly, create the present invention of true tool practicality effect finally.
Summary of the invention
Fundamental purpose of the present invention is, overcome the defective of the heating radiator method for detecting vibration of above-mentioned existing staff subjective judgement heating radiator vibration problem, and provide a kind of brand-new heating radiator method for detecting vibration and detection system thereof, vibration signal when this detection method and detection system are gathered heating radiator work, carry out automatic spectrum analysis and judgement, thereby very scientificlly and effectively carried out the judgement of the size of heating radiator vibration.
Purpose of the present invention and solve its technical problem underlying and realize by following technical scheme is provided.
The method for detecting vibration of heating radiator provided by the invention comprises the steps:
First step: tested heating radiator is fixed on the test fixture, and, records fan rotating speed signals to the radiator fan power supply;
Second step: the fan rotating speed signals that records is sent to controlling computer with standard vibration analysis software module;
Third step: gather the heating radiator vibration signal;
The 4th step: the heating radiator vibration signal of gathering is amplified by signal amplifier;
The 5th step: the vibration signal that amplifies is handled;
The 6th step: but carry out the setting of vibration-testing content and rotation speed of the fan scope according to the options that testing software provides;
The 7th step: described controlling computer is carried out FFT to the vibration signal of the 5th step input and is shown in real time, and shows the test judgement content of the 6th step, then the rotation speed of the fan that records, vibration signal and the 6th step setting option is compared judgement;
The 8th step: the comparison judged result according to the 7th step shows finally whether this heating radiator magnitude of vibrations meets the requirements.
In above-mentioned detection method, described tested heating radiator is fixed on the test platform with 1,2 or 3 acceleration sensor on X, Y, three directions of Z of test fixture by mounting bracket and fastener; The three PIN joints that described radiator fan is drawn from tachograph are powered, and record its tach signal from this tachograph; Described heat radiation vibration signal is by 1,2 on described three directions or 3 acceleration sensor collections.
In above-mentioned detection method, described power supply is supplied with by the stabilized voltage supply of 12V; Described computer is a PC; Described tachograph is the tachograph of standard module; Described vibration signal collector is the standard module vibration signal collector.
In above-mentioned detection method, the relatively judgement of described rotation speed of the fan is specifically carried out as follows: with rotation speed of the fan divided by 60, obtain fundamental vibration frequency K, input fundamental frequency K with and the vibration limit value of frequency multiplication 2K, 3K and 4K, the vibration of judging these four the frequency places then value that whether transfinites; Relatively the judging of described heating radiator vibration signal be meant select on X, Y, the some independent, direction of Z earlier select certain both direction or three directions on vibration limit value, then with certain or certain two or three directions of measuring gained on vibration values La compare judgement, for ease of reading and judgement, make La=10Lg ∑ 10
Lai/10
In the formula: La is the final explicit value of vibration, and unit is dB
Lai is the vibration values of each frequency on the vibration-testing intermediate frequency spectrum, and unit is dB
Lai＝20Log
Lf Laj
In the formula: Laj is the mean effective value of the vibration of each frequency on the vibration-testing intermediate frequency spectrum, and unit is m/s
2
Lf is that reference value is 1um/s
2
The computing formula of the vibration total value of both direction and three directions is as follows:
La=10Lg1/2 (10
La1/10+ 10
La2/10) and
La＝10Lg1/2(10
La1/10+10
La2/10+10
La3/10)。
The vibration detecting system of heating radiator provided by the invention comprises test fixture, power supply, tachograph, the computer that has the vibration signal collector of signal amplifier and signal analyzer and have the standard vibration analysis software module, wherein test fixture is a test platform, be provided with the mounting bracket that is screwed in the above, this mounting bracket is provided with fastener, below test platform, be provided with a soft pad, at 1,2 or 3 acceleration transducers being provided with on the test platform on X, Y, three directions of Z; Power supply is electrically connected with tested radiator fan; Tachograph one end links to each other with radiator fan, and the other end is electrically connected with described computer; The input end of vibration signal collector is electrically connected with described 1,2 or 3 acceleration transducers respectively, and its output terminal is electrically connected with described computer.
In said detecting system, the material of described test platform is an almag, have a boss identical above it with CPU size, and the distance of boss surface to test platform equates with the surperficial distance to the mainboard installation surface of CPU in the reality use, the thickness of test platform is 10-15mm, and is provided with the routine that weight reduction guarantees rigidity and empties part; Described soft pad is a soft foam-rubber cushion that about 25mm is thick, and stick on test platform below.
In said detecting system, described power supply is the stabilized voltage supply of 12V; Described computer is a PC; Described tachograph is the tachograph of standard module; Described vibration signal collector is the standard module vibration signal collector.
The present invention compares with existing detection method has tangible advantage and beneficial effect.By above technical scheme as can be known, heating radiator method for detecting vibration of the present invention and detection system thereof have following advantage at least:
1. can carry out the detection of heating radiator vibration and rotating speed easy, fully and effectively, thereby can guarantee the may command of heating radiator aspect vibration characteristics, guarantee the better quality of heating radiator.
2. take into account and consider that heating radiator can not cause cabinet resonance when the cabinet work of being installed.
3. can carry out the fault diagnosis of heating radiator abnormal vibration by the spectrum signal of vibration.
4. because this detection system is simple and direct, mode of operation efficiently, make this system carry out analysis of vibration measurement in the laboratory, also be suitable for the production testing of streamline.
In sum, the heating radiator method for detecting vibration and the detection system thereof of special construction of the present invention, have above-mentioned many advantages and practical value, and in like product, there is no similar structural design and published or use,, and had large improvement technically no matter it structurally or bigger improvement is all arranged on the function, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is a detection method block diagram of the present invention.
Fig. 2 is the structural representation of test fixture of the present invention.
Fig. 3 is the structural representation of detection system of the present invention.
Fig. 4 is a software block diagram of the present invention.
Among the figure:
The soft pad of 1-2-acceleration transducer 3-test platform
4-screw 5-mounting bracket 6-fastener
7-heating radiator 8-fan
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the method for detecting vibration of the heating radiator that foundation the present invention is proposed and embodiment, structure, feature and the effect thereof of detection system thereof, describe in detail as after.
See also Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the method for detecting vibration of heating radiator of the present invention, it may further comprise the steps:
First step: tested heating radiator is fixed on the test fixture by mounting bracket 5, fastener 6, uses the three PIN joints of drawing from tachograph to power to radiator fan;
Second step: the fan rotating speed signals that records from tachograph is passed to PC controlling computer with standard vibration analysis software module;
Third step: gather the heating radiator vibration signal with three acceleration sensors;
The 4th step: the heating radiator vibration signal that collects is amplified with signal amplifier;
The 5th step: the vibration signal that amplifies is handled;
The 6th step: but carry out the setting of vibration-testing content and rotation speed of the fan scope according to the options that testing software provides;
The 7th step: described controlling computer is carried out FFT to the vibration signal of the 5th step input and is shown in real time, and shows the test judgement content of the 6th step, then the rotation speed of the fan that records, vibration signal and the 6th step setting option is compared judgement;
The 8th step: the comparison judged result according to the 7th step shows finally whether this heating radiator magnitude of vibrations meets the requirements.
See also Fig. 2, Fig. 3 and shown in Figure 4, the vibration detecting system of heating radiator of the present invention, it comprises: test fixture shown in Figure 2, the 12V stabilized voltage supply among Fig. 3, tachograph, three acceleration sensors, it includes the standard module vibration signal collector of signal amplifier and signal analyzer and is integrated with the PC that vibration-testing shown in Figure 4 is judged software module and standard vibration analysis software module.
See also shown in Figure 2ly, it is the test fixture that is placed with tested heating radiator and fan 8, and this test fixture is realized effective installation of tested heating radiator and three acceleration sensors and effective collection of acceleration sensor vibration signal.Mounting bracket 5, screw 4, fastener 6 all are the standard components supporting with heating radiator.Test platform 3 uses almag to make, and guarantees that test platform is in light weight, the requirement of good rigidly.The boss that these test platform 3 upper process one and CPU size is identical, and boss surface is identical to the distance of mainboard installation surface with CPU surface during reality is used to the distance of test platform 3, thus installment state is consistent when guaranteeing heating radiator with actual use.On the other hand, consider the efficient of test and the validity of test, if degree of will speed up sensor is installed on the heating radiator and tests at every turn, relatively difficulty is installed on the one hand, and because of most heating radiator is aluminum products, sensor is only to paste with glue or beeswax, and when the vibration of three directions of test, it is just more time-consuming that three sensors are installed, and simultaneously each sensor is installed differently, very big to the test result influence.For head it off, spy's degree of will speed up sensor of the present invention is installed on the test platform 3 very securely, when testing the heating radiator vibration at every turn, just mounting bracket 5, screw 4, the fastener 6 of different heating radiators by standard is installed on the test platform and gets final product.After vibration has been sampled, heating radiator is pulled down, and need not be installed and removed sensor at every turn, guarantee the consistance of each test result.Test platform 3 special aluminium magnesium alloy materials, this material is very light, good rigidly, simultaneously these test platform 3 thickness are accomplished 10-15mm, for example select 12mm, the length and width size satisfy under the prerequisite of sensor installation as far as possible little, under the prerequisite that does not influence test platform 3 integral rigidities, for alleviating the weight of test platform 3, can do some 3 times at test platform and empty processing, alleviate the weight of test platform 3, thereby guarantee that test platform 3 light weight can not absorb vibrational energy too much, guarantee the validity of test result.While test platform 3 good rigidlies, resonance effect can not take place in test platform 3 in the heating radiator test process, has guaranteed that degree of will speed up sensor is fixed on validity, the consistance of testing on test platform 3 diverse locations.Simultaneously as shown in Figure 1, we can install three acceleration sensors in the present embodiment with on one, the X that is fixed on test platform 3, Y that two or three acceleration transducers are very firm, Z different directions.In test, for fear of the influence of extraneous vibration to test, the vibration transfer of also avoiding heating radiator causes the vibratory response of other objects to other objects, below test platform 3, paste big, a softer foam-rubber cushion 1 of material of a density that about 25mm is thick, thereby play test suite and extraneous vibration isolation, eliminate the transmission of extraneous vibration, and test suite causes the vibratory response of other objects to test suite.
After Fig. 2 test fixture has been arranged, introduce detection system of the present invention below.
See also shown in Figure 3ly, directly to the radiator fan power supply, we can measure the vibration characteristics of heating radiator under different operating voltage stabilized voltage supply by two power leads.The attaching plug PIN of radiator fan, except two PIN are power leads, another root is the feedback line of rotation speed of the fan, by plug the speed feedback line is received the rotation speed of the fan registering instrument of a special use, and tachograph is delivered to rotary speed information the PC as described controlling computer again.
After accepting the signal of three acceleration transducers to change, vibration signal collector also is delivered on the PC as described controlling computer, after vibration signal passes to PC, carry out the real-time vibration frequency specturm analysis of FFT by the standard vibration analysis software module, for the ease of reading and judgement, we do following concrete processing to the vibration-testing output signal:
La=10Lg ∑ 10
Lai/10In the formula:
La is the final displayed value of vibration, and unit is dB
Lai is the vibration values of each frequency on the vibration-testing intermediate frequency spectrum, and unit is dB
Lai＝20Log
Lf Laj
In the formula:
Laj is the mean effective value of each frequency vibration on the vibration-testing intermediate frequency spectrum, and unit is m/s
2
Lf is that reference value is 1um/s
2
After the vibration signal of gathering done as above to handle, the unit of vibration values just became dB, judges by the automatic analysis software of the special design of detection system for this reason whether heating radiator vibration and rotation speed of the fan meet the requirements.The design frame chart of software as shown in Figure 4.
Design frame chart at software specifies as follows: the analysis and judgement of software is considered three big aspects, when waiting all judgements to have one to exceed standard, the caution of display screen shiny red, and write down the content that all exceed standard, when waiting each judgement all to satisfy, show just on the display screen of system that PASS represents to pass through, in the many options aspect carrying out discriminatory analysis three, can select wherein several or full choosing at different heating radiators and test case.
Three aspects that software analysis is judged are respectively: vibration and rotating speed that the fan rotating speed that, follows the wind is relevant are judged, can have influence on the characteristics such as heat dispersion, noise, vibration of heating radiator because whether stable rotation speed of the fan, therefore at first import the rated speed of this heating radiator, rotation speed of the fan be controlled at rated speed+-10% within.Measured value and setting to rotation speed of the fan compares then; Because if abnormal vibration appears in heating radiator, most of reasons are that fan causes, and at rotation speed of the fan (RPM) divided by the 60 fundamental frequency K that obtain fan vibration, may can produce vibration peak at fundamental frequency K and frequency multiplication 2K, 3K, 4K place when fan is unusual, therefore we can select vibration limit value at fundamental frequency K and each frequency multiplication place of fan, and the vibration values at each frequency place is independently judged; Two, carry out the judgement of heating radiator vibration total value, can select the vibration on some independent, direction to judge,, judge then such as setting the vibration limit value on certain direction in X, Y, the Z direction; Also can select the vibration total value on certain both direction or three directions to judge, the computing formula of vibration total value is on both direction and three directions: La=10Lg1/2 (10
La1/10+ 10
La2/10) and La=10Lg1/2 (10
La1/10+ 10
La2/10+ 10
La3/10); Three, consider to avoid the resonance of heating radiator vibration causing computer housing, cause that cabinet resonance needs two aspect conditions, the one, the heating radiator vibration frequency is identical with the natural frequency of cabinet, the 2nd, the vibration amplitude of heating radiator on the cabinet natural frequency will reach a certain size, therefore can set the limit value of heating radiator on the cabinet natural frequency and judge according to some characteristics of used cabinet.
See also shown in Figure 4ly, this software at first carries out filling in of vibration-testing content in use, the rotation speed of the fan of input radiator fan and the option of selecting to carry out vibration detection.After being installed to tested heating radiator on the frock shown in Figure 2, to radiator fan energising (12V), trigger three acceleration sensors and gather vibration signal, signal is input in the controlling computer after signal amplification, the signal Processing according to shown in Figure 3 carrying out, controlling computer shows the real time spectrum that vibration signal carries out FFT, real-time spectrum signal and the rotation speed of the fan, the vibration-testing content that are provided with are in advance compared judgement, when waiting all content measurements all to pass through, system shows PASS, represents that this heating radiator vibration-testing meets the requirements.If when having one to exceed standard in the content measurement, system shows FAIL, represents that this heating radiator vibration-testing exceeds standard.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. the method for detecting vibration of a heating radiator, it is characterized in that: it may further comprise the steps:
First step: tested heating radiator is fixed on the test fixture, and, records fan rotating speed signals to the radiator fan power supply;
Second step: the fan rotating speed signals that records is sent to controlling computer with standard vibration analysis software module;
Third step: gather the heating radiator vibration signal;
The 4th step: the heating radiator vibration signal of gathering is amplified by signal amplifier;
The 5th step: the vibration signal that amplifies is handled;
The 6th step: but carry out the setting of vibration-testing content and rotation speed of the fan scope according to the options that testing software provides;
The 7th step: described controlling computer is carried out FFT to the vibration signal of the 5th step input and is shown in real time, and shows the test judgement content of the 6th step, then the rotation speed of the fan that records, vibration signal and the 6th step setting option is compared judgement;
The 8th step: the comparison judged result according to the 7th step shows finally whether this heating radiator magnitude of vibrations meets the requirements.
2. the method for detecting vibration of heating radiator according to claim 1, it is characterized in that: described tested heating radiator is fixed on the test platform with 1,2 or 3 acceleration sensor on X, Y, three directions of Z of test fixture by mounting bracket and fastener; The three PIN joints that described radiator fan is drawn from tachograph are powered, and record its tach signal from this tachograph; Described heat radiation vibration signal is by 1,2 on described three directions or 3 acceleration sensor collections.
3. the method for detecting vibration of heating radiator according to claim 2 is characterized in that: described power supply is supplied with by the stabilized voltage supply of 12V; Described computer is a PC; Described tachograph is the tachograph of standard module; Described vibration signal collector is the standard module vibration signal collector.
4. according to the method for detecting vibration of claim 1,2 or 3 described heating radiators, it is characterized in that: the relatively judgement of described rotation speed of the fan is specifically carried out as follows: with rotation speed of the fan divided by 60, obtain fundamental vibration frequency K, input fundamental frequency K with and the vibration limit value of frequency multiplication 2K, 3K and 4K, the vibration of judging these four the frequency places then value that whether transfinites; Relatively the judging of described heating radiator vibration signal be meant select on X, Y, the some independent, direction of Z earlier select certain both direction or three directions on vibration limit value, then with certain or certain two or three directions of measuring gained on vibration values La compare judgement, for ease of reading and judgement, make La=10Lg ∑ 10
Lai/10
In the formula: La is the final explicit value of vibration, and unit is dB
Lai is the vibration values of each frequency on the vibration-testing intermediate frequency spectrum, and unit is dB
Lai＝20Log
Lf Laj
In the formula: Laj is the mean effective value of the vibration of each frequency on the vibration-testing intermediate frequency spectrum, and unit is m/s
2
Lf is that reference value is 1um/s
2
The computing formula of the vibration total value of both direction and three directions is as follows:
La=10Lg1/2 (10
La1/10+ 10
La2/10) and
La＝10Lg1/2(10
La1/10+10
La2/10+10
La3/10)。
5. the vibration detecting system of a heating radiator, it is characterized in that: comprise test fixture, power supply, tachograph, have the vibration signal collector of signal amplifier and signal analyzer and computer with standard vibration analysis software module, wherein test fixture is a test platform (3), be provided with in the above with the fixing mounting bracket (5) of screw (4), this mounting bracket (5) is provided with fastener (6), below test platform (3), be provided with a soft pad (1), on test platform (3), be provided with X, Y, on three directions of Z 1,2 or 3 acceleration transducers (2); Power supply is electrically connected with tested radiator fan; Tachograph one end links to each other with radiator fan, and the other end is electrically connected with described computer; The input end of vibration signal collector is electrically connected with described 1,2 or 3 acceleration transducers (2) respectively, and its output terminal is electrically connected with described computer.
6. the vibration detecting system of heating radiator according to claim 5, it is characterized in that: the material of described test platform (3) is an almag, have a boss identical above it with CPU size, and the distance of boss surface to test platform (3) equates with the surperficial distance to the mainboard installation surface of CPU in the reality use, the thickness of test platform (3) is 10-15mm, and is provided with the routine that weight reduction guarantees rigidity and empties part; Described soft pad (1) is a soft foam-rubber cushion that about 25mm is thick, and stick on test platform (3) below.
7. according to the vibration detecting system of claim 5 or 6 described heating radiators, it is characterized in that: described power supply is the stabilized voltage supply of 12V; Described computer is a PC; Described tachograph is the tachograph of standard module; Described vibration signal collector is the standard module vibration signal collector.
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| CN 02129223 CN1241005C (en) | 2002-08-28 | 2002-08-28 | Vibration detecting method of heat radiator and its detecting system |
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| TWI615235B (en) * | 2016-12-22 | 2018-02-21 | Hiwin Tech Corp | Adaptive vibration sensing method |
| CN111230586A (en) * | 2018-11-28 | 2020-06-05 | 发那科株式会社 | Control device and control method |
| CN111230586B (en) * | 2018-11-28 | 2023-05-09 | 发那科株式会社 | Control device and control method |
| CN110594183A (en) * | 2019-10-11 | 2019-12-20 | 中车大连机车车辆有限公司 | Method and system for inhibiting resonance of vehicle-mounted fan |
| CN110579707A (en) * | 2019-10-12 | 2019-12-17 | 昆山欧标仪器有限公司 | Fan motor test system |
| CN116146518A (en) * | 2022-12-30 | 2023-05-23 | 深圳市优必行科技有限公司 | Control method of cooling fan and electronic equipment |
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