CN101093395A - Device and method for testing electrical specification of pulse-width modulated fan - Google Patents
Device and method for testing electrical specification of pulse-width modulated fan Download PDFInfo
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- CN101093395A CN101093395A CN 200610061309 CN200610061309A CN101093395A CN 101093395 A CN101093395 A CN 101093395A CN 200610061309 CN200610061309 CN 200610061309 CN 200610061309 A CN200610061309 A CN 200610061309A CN 101093395 A CN101093395 A CN 101093395A
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Abstract
A method for testing electric performance of pulse-width modulated fan includes storing standard parameter of said fan, setting operation parameter of said fan and operating said fan according to set operation parameter, collecting operation information of said fan and calculating out electric performance parameter of said fan according to collected operation information, comparing obtained electric performance parameter with said standard parameter for confirming whether electric performance of said fan is on specification or not.
Description
Technical field
The present invention relates to a kind of fan test device and method, relate in particular to a kind of pulse-width modulated fan performance testing device and method.
Technical background
Compare with conventional three-wire type fan (two power leads, a signal wire pattern), the PWM fan increases to four lines with number of lead wires, and the single line that has more is used to control the fan ON time.The full name of PWM is Pulse Width Modulation (pulse-length modulation), and it is used to control the rotating speed of fan.But prerequisite is that the power supply of fan is four needle interfaces.The rotating speed of fan can utilize the circulation change of PWM to control accurately, realizes the balance between noise and the performance.PWM control rotation speed of the fan is to carry out according to the size of this fan dutycycle, and its control accuracy is very high.
Because of the PWM fan has plurality of advantages such as energy-conservation, and become the new lover in computer system heat radiation field.In the following way the rotating speed of PWM fan is detected at present mostly, that is: provide fan power supply with power supply unit, produce the pwm signal ripple of needed certain frequency, dutycycle (needing detect) with signal generator, again with the rotating speed of velocity gauge test fan with oscillograph.When the staff need test the electric property of PWM fan, at first need to test by rotation speed of the fan, yet, the measurement of rotating speed equipment needed thereby of PWM fan is numerous, occupation space is bigger, and test is trouble quite, and required personnel specialty quality also must be higher, therefore is not suitable for the pipelining of production line large-tonnage product.In addition, PWM fan test parameter is more, and how existing test mode edits test parameter with the button editing machine, and speed is slower, therefore causes efficient to reduce.
Summary of the invention
In view of above content, be necessary to provide a kind of electrical specification of pulse-width modulated fan proving installation, its test is accurate, convenient, and the testing efficiency height, and usable range is wide.
In view of above content, be necessary to provide a kind of electrical specification of pulse-width modulated fan method of testing, its test is accurate, convenient, and the testing efficiency height, and usable range is wide.
A kind of PWM electric property of fan proving installation, comprise that an interface board is used to install at least one PWM fan to be measured, this PWM electric property of fan proving installation also comprises the electric property of fan test controller of a computing machine and and this computing machine and interface board communication.Described computing machine comprises: a storage unit, the item number parameter that is used to store described PWM fan; One is provided with the unit, and the operating parameters of this PWM fan is set, and sends this operating parameters to described electric property of fan test controller; A sampling card, the operation information when gathering the PWM fan running; A computing unit calculates the electric property parameter of this PWM fan according to described operation information; And a contrast unit, electric property parameter and the described item number parameter of being calculated compared, whether qualified with the electric property of determining this PWM fan.
A kind of PWM electric property of fan method of testing comprises that step is as follows: the item number parameter of storing PWM fan to be measured; The operating parameters of this PWM fan is set; According to the set operating parameters described PWM fan that turns round; Gather the operation information of this PWM fan; Calculate the electric property parameter of described PWM fan according to described operation information; Whether and electric property parameter that will be calculated compares with the item number parameter of this PWM fan, qualified with the electric property of definite this PWM fan.
Compared to prior art, described electrical specification of pulse-width modulated fan proving installation and method, whether the electric property that can test out the PWM fan accurately is qualified, and its method of testing is convenient, the testing efficiency height, usable range is wide.
Description of drawings
Fig. 1 is the hardware structure figure of electrical specification of pulse-width modulated fan proving installation of the present invention preferred embodiment.
Fig. 2 is the concrete structure figure of electrical specification of pulse-width modulated fan proving installation of the present invention preferred embodiment.
Fig. 3 is the function unit figure of computing machine shown in Figure 1.
Fig. 4 is the operation process chart of electrical specification of pulse-width modulated fan method of testing of the present invention preferred embodiment.
Embodiment
As shown in Figure 1, be the hardware structure figure of PWM electric property of fan proving installation of the present invention preferred embodiment.This device is used to test the electric property of PWM fan, and it comprises a computing machine 1, a serial ports 2, a desk fan electric performance test controller 3, an interface board 4 and a power supply unit 5.This computing machine 1 is by serial ports 2 and described electric property of fan test controller 3 communications.Wherein, computing machine 1 stores the item number parameter of a plurality of PWM fans, and the item number parameter of this PWM fan comprises: the rated current of described pwm signal ripple, frequency, test duration, when the fan reference rotation velocity of each dutycycle correspondence and floating empty reference rotation velocity etc. of floating hollow testing, duty whether.This computing machine 1 also is used to be provided with the operating parameters of PWM fan, and sends this operating parameters by serial ports 2 to described electric property of fan test controller 3.The operating parameters of described PWM fan comprises voltage, frequency and dutycycle.
Interface board 4 links to each other with described electric property of fan test controller 3 respectively with power supply unit 5.At least one PWM fan to be measured can be installed on this interface board 4.Described power supply unit 5 provides DC voltage by electric property of fan test controller 3 to PWM fan to be measured, makes PWM fan to be measured to run well, and this DC voltage can be 5 volts and 12 volts etc.
As shown in Figure 2, be the concrete structure figure of electrical specification of pulse-width modulated fan proving installation of the present invention preferred embodiment.Described electric property of fan test controller 3 comprises a crystal oscillator 30, microprogram control unit (Micro Controller Unit, MCU) 32, counters 34, crystal oscillator 36, a holding circuit 38 and a display device 40.
MCU32 is used for the operating parameters that receiving computer 1 sends, and controls described counter 34 generation pwm signal ripples according to this operating parameters, and the PWM fan is according to this pwm signal ripple running.Described crystal oscillator 30 links to each other with MCU32, is used for providing the drive clock reference standard to MCU32.Described crystal oscillator 36 is used for actuation counter 34 and produces the PWM ripple.In PWM fan running process, if abnormal information occurs in the circuit, described holding circuit 38 is used to protect electric property of fan test controller 3 to be without prejudice, and plays the effect of isolating and cushioning.
Described display device 40 comprises at least one light emitting diode (Light EmittingDiode, LED) 400 and hummers 402.This display device 40 is connected with PWM fan to be measured by interface board 4, be used for the PWM electric property of fan test result that sent by MCU32 receiving computer 1, and acousto-optic shows this test result.Particularly, when the PWM electric property of fan was qualified, coupled LED400 showed a kind of color, and is for example green; When the PWM electric property of fan was defective, described LED400 is different from color shown when qualified and shows with a kind of, and was for example red, and hummer 402 sends alerting signal.
As shown in Figure 3, be the function unit figure of computing machine 1 shown in Figure 2.Described computing machine 1 comprise a storage unit 12, detecting unit 14, one unit 16,18, computing unit of sampling card 20, a contrast unit 22 and a judging unit 24 are set.
Described storage unit 12 is used to store the item number parameter of PWM fan, and this item number parameter comprises: the rated current of described pwm signal ripple, frequency, test duration, when the fan reference rotation velocity and the floating empty reference rotation velocity of each dutycycle correspondence of floating hollow testing, duty whether.Described detecting unit 14 is used for whether having set up communication between detection computations machine 1, serial ports 2, electric property of fan test controller 3, interface board 4, power supply unit 5 and the PWM fan to be measured.
Described the operating parameters that unit 16 is used to be provided with PWM fan to be measured is set, and to fan electric performance test controller 3 these operating parameters of transmission, this operating parameters comprises voltage, frequency and dutycycle, for example, it is 12 volts that the running voltage that unit 16 is provided with PWM fan to be measured is set, frequency is 25 KHz, and dutycycle is 10%.MCU32 produces the pwm signal ripple according to this operating parameters control counter 34, and described PWM fan is according to this pwm signal ripple running.
Electric property parameter and described item number parameter that contrast unit 22 is used for the PWM fan that will be calculated compare, and determine whether the rotating speed of this PWM fan and electric current meet described item number parameter.Judgment formula is: reference rotation velocity X (1-tolerance %)=＜actual measurement rotating speed＜=reference rotation velocity X (1+ tolerance %), rated current Y (1-tolerance %)=＜measured current＜=rated current Y (1+ tolerance %).If the rotating speed of the PWM fan that is calculated and current uniform within the scope of described judgment formula, do not prove that then the electric property parameter of this PWM fan meets described item number parameter, the electric property of this PWM fan is qualified; Otherwise the electric property of this PWM fan is defective.For example, when voltage is 12 volts, frequency is 25 KHz, dutycycle is 10% o'clock, the reference rotation velocity of PWM fan to be measured is 600 rpms, rated current is 50 milliamperes, if error range is 10%, then 540 rpms=＜actual measurement rotating speed＜=660 rpm, 30 milliamperes=＜measured current＜=60 milliampere, if rotating speed that computing unit 20 is calculated or electric current be not within above-mentioned scope, the electric property that then proves described PWM fan is defective, be that described PWM fan must satisfy rotating speed and electric current all within term of reference the time, its electric property is just qualified.
The item number parameter that judging unit 24 is stored according to storage unit 12 determines whether to float hollow testing, and described floating hollow testing is meant a PWM line of PWM fan unsettled, tests the rotating speed of this PWM fan.
As shown in Figure 4, be the operation process chart of electrical specification of pulse-width modulated fan method of testing of the present invention preferred embodiment.At first, whether described computing machine 1 has set up communication (step S400) by serial ports 2 and 3 communications of electric property of fan test controller between detecting unit 14 detection computations machines 1, serial ports 2, electric property of fan test controller 3, interface board 4, power supply unit 5 and the PWM fan to be measured.
If set up communication between above-mentioned all devices, PWM fan to be measured then is installed on interface board 4, and is started test (step S401).In the present embodiment, described PWM fan to be measured can be a plurality of.
The operating parameters that unit 16 is provided with PWM fan to be measured is set, and to fan electric performance test controller 3 these operating parameters of transmission, this operating parameters comprises voltage, frequency and dutycycle, for example, it is 12 volts that the running voltage that unit 16 is provided with PWM fan to be measured is set, frequency is 25 KHz, and dutycycle is 10% (step S402).
MCU32 receives described operating parameters, and produces the pwm signal ripple according to this operating parameters control counter 34, and described PWM fan is according to this pwm signal ripple running (step S403).
The result who is compared according to contrast unit 22 determines whether the electric property parameter of described PWM fan meets described item number parameter (step S406).Judgment formula is: reference rotation velocity X (1-tolerance %)=＜actual measurement rotating speed＜=reference rotation velocity X (1+ tolerance %), rated current Y (1-tolerance %)=＜measured current＜=rated current Y (1+ tolerance %).If the electric property parameter of described PWM fan is not within the scope of judgment formula, the electric property of then described PWM fan is defective, directly enter step S410 and carry out sound and light alarm, for example, when voltage is 12 volts, frequency is 25 KHz, dutycycle is 10% o'clock, the reference rotation velocity of PWM fan to be measured is 600 rpms, rated current is 50 milliamperes, then 540 rpms=＜actual measurement rotating speed＜=660 rpm, 30 milliamperes=＜measured current＜=60 milliampere, yet, the electric current of the rotating speed that computing unit 20 is calculated not within this scope or during described PWM fan running proves that then this PWM electric property of fan is defective not within described scope.
If the electric property parameter of PWM fan is within described scope, then the judging unit 24 item number parameter of being stored according to storage unit 12 determines whether to float hollow testing, described floating hollow testing is meant a PWM line of PWM fan unsettled, tests the rotating speed (step S407) of this PWM fan.
If need float hollow testing, then according to said method by the PWM fan running, and calculate the floating idling speed (step S408) of this PWM fan.
If described floating idling speed does not meet described item number parameter, then the electric property of this PWM fan is defective, the test result sound and light alarm that display device 40 is sent by MCU32 receiving computer 1, particularly, LED400 shows red, and hummer 402 sends alerting signal (step S410) simultaneously.
If described floating idling speed meets described item number parameter, then the electric property of this PWM fan is qualified, and LED400 shows green (step S411).
Claims (17)
1. an electrical specification of pulse-width modulated fan proving installation comprises an interface board, is used to install at least one pulse-width modulated fan to be measured, it is characterized in that:
This electrical specification of pulse-width modulated fan proving installation also comprises the electric property of fan test controller of a computing machine and and this computing machine and interface board communication, and wherein, described computing machine comprises:
A storage unit, the item number parameter that is used to store described pulse-width modulated fan;
One is provided with the unit, and the operating parameters of this pulse-width modulated fan is set, and sends this operating parameters to described electric property of fan test controller;
A sampling card, the operation information when gathering the pulse-width modulated fan running;
A computing unit calculates the electric property parameter of this pulse-width modulated fan according to described operation information; And
Whether a contrast unit compares electric property parameter and the described item number parameter of being calculated, qualified with the electric property of determining this pulse-width modulated fan.
2. electrical specification of pulse-width modulated fan proving installation as claimed in claim 1 is characterized in that, voltage signal values and current signal value that described operation information is produced when comprising the pulse-width modulated fan running.
3. electrical specification of pulse-width modulated fan proving installation as claimed in claim 1 is characterized in that, described electric property of fan test controller comprises:
A microprogram control unit is used for the operating parameters that receiving computer sends;
A counter, this counter links to each other with described microprogram control unit, is used for producing the pulse-width signal ripple according to this operating parameters, and described pulse-width modulated fan is according to this pulse-width signal ripple running; And
A display device, this display device links to each other with described microprogram control unit and pulse-width modulated fan, is used to show the comparative result of computing machine, and this display device comprises:
At least one light emitting diode shows with color whether the electric property of the pulse-width modulated fan that it connects is qualified; And
A hummer is used for its electrical specification of pulse-width modulated fan that connects and sends alerting signal when defective.
4. electrical specification of pulse-width modulated fan proving installation as claimed in claim 3 is characterized in that, described counter connects a holding circuit, is used for protecting the circuit of described electric property of fan test controller.
5. electrical specification of pulse-width modulated fan proving installation as claimed in claim 3 is characterized in that, described microprogram control unit links to each other with a crystal oscillator, and this crystal oscillator is used for providing the drive clock reference standard to this microprogram control unit.
6. electrical specification of pulse-width modulated fan proving installation as claimed in claim 3 is characterized in that, described electric property of fan test controller comprises that also is used to drive the crystal oscillator that described counter produces the pulse-width signal ripple.
7. electrical specification of pulse-width modulated fan proving installation as claimed in claim 3 is characterized in that the operating parameters of described pulse-width modulated fan comprises voltage, frequency and dutycycle.
8. electrical specification of pulse-width modulated fan proving installation as claimed in claim 1 is characterized in that, this electrical specification of pulse-width modulated fan proving installation also comprises a power supply unit, is used for providing direct supply to described electric property of fan test controller.
9. electrical specification of pulse-width modulated fan proving installation as claimed in claim 1, it is characterized in that the item number parameter of described pulse-width modulated fan comprises: the rated current of described pulse-width signal ripple, frequency, test duration, when the fan reference rotation velocity and the floating empty reference rotation velocity of each dutycycle correspondence of floating hollow testing, duty whether.
10. electrical specification of pulse-width modulated fan proving installation as claimed in claim 1 is characterized in that, described electric property parameter comprises the rotating speed and the electric current of pulse-width modulated fan.
11. an electrical specification of pulse-width modulated fan method of testing is characterized in that, it is as follows that the method comprising the steps of:
Store the item number parameter of pulse-width modulated fan to be measured;
The operating parameters of this pulse-width modulated fan is set;
According to the set operating parameters described pulse-width modulated fan that turns round;
Gather the operation information of this pulse-width modulated fan;
Calculate the electric property parameter of described pulse-width modulated fan according to described operation information; And
The electric property parameter calculated and the item number parameter of this pulse-width modulated fan are compared, whether qualified with the electric property of determining this pulse-width modulated fan.
12. electrical specification of pulse-width modulated fan method of testing as claimed in claim 11 is characterized in that, voltage signal values and current signal value that described operation information is produced when comprising this pulse-width modulated fan running.
13. electrical specification of pulse-width modulated fan method of testing as claimed in claim 11 is characterized in that the operating parameters of described pulse-width modulated fan comprises voltage, frequency and dutycycle.
14. electrical specification of pulse-width modulated fan method of testing as claimed in claim 11 is characterized in that, described electric property parameter comprises the rotating speed and the electric current of pulse-width modulated fan.
15. electrical specification of pulse-width modulated fan method of testing as claimed in claim 11, it is characterized in that the item number parameter of described pulse-width modulated fan comprises the rated current, frequency, test duration of pulse-width signal ripple, when the fan reference rotation velocity and the floating empty reference rotation velocity of each dutycycle correspondence of floating hollow testing, duty whether.
16. electrical specification of pulse-width modulated fan method of testing as claimed in claim 15 is characterized in that this method also comprises the steps:
Judge whether described pulse-width modulated fan needs to float hollow testing;
If described pulse-width modulated fan need float hollow testing, voltage signal values and current signal value when then gathering the floating dry run of this pulse-width modulated fan, and calculate the floating idling speed of this pulse-width modulated fan; And
The floating idling speed of the pulse-width modulated fan that calculated and the floating empty reference rotation velocity of this pulse-width modulated fan are compared, whether qualified with the electric property of determining described pulse-width modulated fan.
17. electrical specification of pulse-width modulated fan method of testing as claimed in claim 16 is characterized in that this method also comprises the steps:
If the electric property of described pulse-width modulated fan is qualified, then connected display device shows a kind of color;
If the electric property of described pulse-width modulated fan is defective, then connected display device shows another kind of color, and sends alerting signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610061309 CN101093395A (en) | 2006-06-23 | 2006-06-23 | Device and method for testing electrical specification of pulse-width modulated fan |
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| CN 200610061309 CN101093395A (en) | 2006-06-23 | 2006-06-23 | Device and method for testing electrical specification of pulse-width modulated fan |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929457A (en) * | 2010-08-27 | 2010-12-29 | 浙江理工大学 | Mini-fan performance test system based on human-computer interaction interface |
| CN102230849A (en) * | 2009-11-24 | 2011-11-02 | 鸿富锦精密工业（深圳）有限公司 | Fan testing system and method |
| CN101923008B (en) * | 2009-06-09 | 2012-09-26 | 鸿富锦精密工业（深圳）有限公司 | Test bench control system of heat radiator and method thereof |
| CN104714866A (en) * | 2013-12-13 | 2015-06-17 | 鸿富锦精密工业(武汉)有限公司 | Fan testing system and method |
| TWI586897B (en) * | 2016-07-11 | 2017-06-11 | 奇鋐科技股份有限公司 | Fan detecting system and method |
| CN107436386A (en) * | 2016-05-27 | 2017-12-05 | 长城汽车股份有限公司 | A kind of electric fan detecting system and vehicle front assembly product line body |
| CN112213582A (en) * | 2020-09-29 | 2021-01-12 | 北京智芯微电子科技有限公司 | Detection system, detection method, detection device and storage medium for electronic module |
| CN112814937A (en) * | 2019-11-15 | 2021-05-18 | 神讯电脑(昆山)有限公司 | Fan aging testing device |
| CN113157502A (en) * | 2021-03-11 | 2021-07-23 | 环荣电子(惠州)有限公司 | Test system and test method for carrying out automatic test by using smart phone |
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2006
- 2006-06-23 CN CN 200610061309 patent/CN101093395A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923008B (en) * | 2009-06-09 | 2012-09-26 | 鸿富锦精密工业（深圳）有限公司 | Test bench control system of heat radiator and method thereof |
| CN102230849A (en) * | 2009-11-24 | 2011-11-02 | 鸿富锦精密工业（深圳）有限公司 | Fan testing system and method |
| CN101929457A (en) * | 2010-08-27 | 2010-12-29 | 浙江理工大学 | Mini-fan performance test system based on human-computer interaction interface |
| CN101929457B (en) * | 2010-08-27 | 2012-01-25 | 浙江理工大学 | Mini-fan performance test system based on human-computer interaction interface |
| CN104714866A (en) * | 2013-12-13 | 2015-06-17 | 鸿富锦精密工业(武汉)有限公司 | Fan testing system and method |
| CN107436386A (en) * | 2016-05-27 | 2017-12-05 | 长城汽车股份有限公司 | A kind of electric fan detecting system and vehicle front assembly product line body |
| TWI586897B (en) * | 2016-07-11 | 2017-06-11 | 奇鋐科技股份有限公司 | Fan detecting system and method |
| CN112814937A (en) * | 2019-11-15 | 2021-05-18 | 神讯电脑(昆山)有限公司 | Fan aging testing device |
| CN112213582A (en) * | 2020-09-29 | 2021-01-12 | 北京智芯微电子科技有限公司 | Detection system, detection method, detection device and storage medium for electronic module |
| CN113157502A (en) * | 2021-03-11 | 2021-07-23 | 环荣电子(惠州)有限公司 | Test system and test method for carrying out automatic test by using smart phone |
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