CN100591923C - Fan rotating speed display device - Google Patents
Fan rotating speed display device Download PDFInfo
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- CN100591923C CN100591923C CN200510035506A CN200510035506A CN100591923C CN 100591923 C CN100591923 C CN 100591923C CN 200510035506 A CN200510035506 A CN 200510035506A CN 200510035506 A CN200510035506 A CN 200510035506A CN 100591923 C CN100591923 C CN 100591923C
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- rotating speed
- signal
- fan
- display device
- speed display
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Abstract
The invention relates to a fan rotation speed display, which comprises at least one instruct element and a control circuit, wherein said instruct element has several display states relative to different fan rotation speeds; and the control circuit is connected between at least one instruct element and the signal output of fan, to control the instruct element at relative display state based on theoutput signal.
Description
[technical field]
The present invention is relevant with fan, relates in particular to a kind of rotating speed display device of fan.
[background technique]
Radiation fan is often to be used in electronic component, as the sink of central processing unit (CPU), and the heat dissipation potential that its different rotating speed is corresponding different.Sometimes, the user of computer wonder radiation fan on earth just with which kind of rotating speed in work, can judge then sometimes that perhaps this kind rotating speed can be competent at present heat radiation task.
So, have the dealer that the rotating speed of fan is demonstrated with concrete numeral.If the user is quite near from computer, fan speed then can show very clear from this numeral.Yet, if the user is away from computer one segment distance, relies on naked eyes can't see this numeral clearly and show, can't judge the rotating speed of fan, even fan whether turn round all unknown.Hence one can see that, and the mode that this numeral shows has its certain narrow limitation.Therefore, be necessary present fan rotating speed display device is made improvements.
[summary of the invention]
At above-mentioned shortcoming, below will introduce a kind of fan rotating speed display device of breaking through distance limit with embodiment.
This fan rotating speed display device comprises an at least one indicator elment and a control circuit.This indicator elment has a plurality of show states corresponding with different rotation speeds of the fan.This control circuit is connected between the signal output part of this at least one indicator elment and this fan, the output signal of this signal output part is a digital signal, this control circuit comprises that one converts this digital signal the change-over circuit of analog voltage signal to, an and comparison circuit that is connected between this change-over circuit and this at least one indicator elment, during work, this change-over circuit is converted to analog voltage signal with the digital signal of this output terminal, this analog voltage signal then with comparison circuit in reference voltage compare, according to this comparison circuit output control signal of comparative result, be operated in corresponding show state to control this at least one indicator elment.
Use after this fan rotating speed display device, the user can judge the rotating speed of fan according to the different show states of indicator elment, and indicator elment can break through the restriction of distance, allows be in the rotating speed that longer-distance user also can judge fan.
[description of drawings]
Fig. 1 is the schematic diagram of fan rotating speed display device;
Fig. 2 illustrates a kind of possible corresponding relation of fan speed and the multiple show state of indicator elment;
Fig. 3 illustrates the another kind of possible corresponding relation of fan speed and the multiple show state of indicator elment;
Fig. 4 illustrates another possible corresponding relation of fan speed and the multiple show state of indicator elment;
Fig. 5 is fan rotating speed display device one embodiment's a circuit diagram;
Fig. 6 is another embodiment's of fan rotating speed display device a circuit diagram; And
Fig. 7 is the another embodiment's of fan rotating speed display device a circuit diagram.
[embodiment]
Below with specific embodiment, each form content that the present invention is disclosed is described in detail.
As shown in Figure 1, be the displaying principle block diagram of the display unit of rotation speed of the fan.This fan has a signal output part FG, and the output signal of this signal output part FG is a continuous digital square-wave, and the frequency correspondence of this square signal the rotating speed of fan, and in other words, the frequency of this square signal is that the rotation speed change with fan changes.This display unit comprises control circuit 20 and indicator elment 50.This control circuit 20 is connected with the signal output part FG of fan, and is operated in corresponding show state according to the output signal control indicator elment 50 of signal output part FG.When the user observes the show state of indicator elment 50, can distinguish the rotating speed situation of fan.Like this, can allow and be in the rotating speed that longer-distance user also can judge fan accurately.
As previously mentioned, this indicator elment 50 need have multiple different show state, and it can be light emitting diode (LED, Light Emitting Diode), and single color LED, dichromatic LED all can be applied to the present invention.This indicator elment 50 also can below will specify in conjunction with using polytype light emitting diode.
Please refer to Fig. 2, is with a single color LED as indicator elment 50 for example, and the different rotating speeds of the different show state reflection fans that how to utilize indicator elment 50 is described.In this embodiment, fan has the rotating speed of four different stages, be respectively: the slow-speed of revolution (500～1000rpm), medium speed (1000～2000rpm), high rotating speed (2000～3000rpm) and ultrahigh rotating speed (more than the 3000rpm), wherein rpm is the unit of rotating speed, rev/min.
To should four kinds of other rotating speeds of level of fan, this single color LED can be operated in four kinds of different show states under the control of control circuit 20.In this embodiment, light emitting diode is respectively with the slow-speed of revolution, medium speed, the high rotating speed of the corresponding fan of the blink states of 0.5Hz, 1Hz and three kinds of different frequencies of 3Hz, and with the ultrahigh rotating speed of the bright corresponding fan of show state of perseverance.Like this, the user just can learn fan is with which kind of rotating speed to rotate at present according to the show state of light emitting diode.
The flicker frequency of above light emitting diode only is a kind of giving an example, and this light emitting diode can also be provided with other flicker frequency with the different rotation speed of the fan of correspondence.And each other rotation speed of the fan of level all can reflect by blink states, and needn't necessarily use permanent bright show state.
With reference to Fig. 3, be as indicator elment 50 for example with double-colored (red/green) light emitting diode, the different rotating speeds of the different show state reflection fans that how to utilize indicator elment 50 is described.In this embodiment, fan and previous embodiments also have the slow-speed of revolution, medium speed, high rotating speed and four kinds of speed of ultrahigh rotating speed.To should four kinds of rotating speeds, this dichromatic LED has green flicker, green permanent bright, red flicker and red permanent bright four kinds of show states.
Please refer to Fig. 4, is with two single color LEDs as indicator elment 50 for example, and the different rotating speeds of the different show state reflection fans that how to utilize indicator elment 50 is described.These of two single color LEDs can send green light, and another can send red light.Four kinds of rotating speeds of corresponding fan, the show state of two single color LEDs is respectively: green permanent bright, red permanent bright, green and redness replace that bright promptly to form flicker, green and redness all bright.More light emitting diode can be used as indicator elment 50, to show more show state.
In addition, the indicator elment 50 of four kinds of rotating speeds of corresponding fan also can be four single color LEDs of arrangement (figure does not draw), is shown in the light emitting diode of diverse location at the fan different rotating speeds, or is shown in the light emitting diode of varying number.As the slow-speed of revolution, medium speed, high rotating speed and four kinds of speed of ultrahigh rotating speed, be shown in the light emitting diode of first, second, third and fourth position respectively, or bright single, several light emitting diodes of while, as the difference of rotating speed.
Be rotation speed of the fan to be divided into four kinds of ranks illustrate among the above embodiment, the rank of rotation speed of the fan can be decided according to designing requirement during specific design, such as, can define how many levels rotating speed is divided into, and the scope of various other speed of level.
Among the above embodiment, the switching of the show state of indicator elment 50 is controlled by control circuit 20.As previously mentioned, the signal of the signal output part FG of this fan output is a digital signal, and this control circuit 20 comprises that one converts this digital signal to the change-over circuit of analog voltage signal and a comparison circuit that is connected between this change-over circuit and this indicator elment.During work, this change-over circuit is converted to analog voltage signal with this digital signal, this analog voltage signal then with comparison circuit in reference voltage compare, according to this comparison circuit of comparative result output control signal, be operated in corresponding show state to control this indicator elment 50.
Seeing also the 5th to Fig. 7, is to implement to illustrate multiple multi-form control circuit 20.
As shown in Figure 5, control circuit 20 comprises a digital/analog converter 22 and a comparator 24.This digital/analog converter 22 is realized the digital signal of the signal output part FG output of fan is converted to analog voltage signal and it is sent into comparator 24, the reference voltage that is provided with comparator 24 compares, and decides the show state of indicator elment 50 then according to comparative result.Therefore, the cut off value that the reference voltage of this comparator 24 should corresponding various other rotation speeds of the fan of level.For example, in the aforementioned embodiment, the analog voltage signal of digital/analog converter 22 outputs was corresponding when the reference voltage of comparator 24 should be 500rpm, 1000rpm, 2000rpm, 3000rpm with rotation speed of the fan.
Please refer to Fig. 6, be the another kind of form of control circuit 20.Among this embodiment, use a frequency 222 to realize the conversion of digital signal to analogue signal.As previously mentioned, the output signal of fan signal output part FG is a square signal, and the frequency of this square wave promptly reflects the rotating speed of fan.Therefore the frequency conversion with this square wave is that analog voltage signal and comparator 224 compare, and promptly knows the rotating speed of fan, thereby shows with the corresponding states of indicator elment 50.This comparator 224 can be identical with aforesaid comparator 24.
Please refer to Fig. 7, be another form of control circuit 20.One programmable single-chip microcomputer 322 (PIC series or AVR series) is connected between the signal output part FG and indicator elment 50 of fan, and this programmable single-chip microcomputer 322 utilizes software to realize the function of aforementioned change-over circuit and comparison circuit.
Claims (10)
1. fan rotating speed display device, this fan comprises a signal output part, and the output signal of this signal output part carries rotation speed of the fan information, and its improvement is that this fan rotating speed display device comprises:
At least one indicator elment has a plurality of show states corresponding with different rotation speeds of the fan; And
One control circuit, be connected between the signal output part of this at least one indicator elment and this fan, the output signal of this signal output part is a digital signal, this control circuit comprises that one converts this digital signal the change-over circuit of analog voltage signal to, an and comparison circuit that is connected between this change-over circuit and this at least one indicator elment, during work, this change-over circuit is converted to analog voltage signal with the digital signal of this output terminal, this analog voltage signal then with comparison circuit in reference voltage compare, according to this comparison circuit output control signal of comparative result, be operated in corresponding show state to control this at least one indicator elment.
2. fan rotating speed display device as claimed in claim 1, wherein this indicator elment is a light emitting diode.
3. fan rotating speed display device as claimed in claim 2, wherein this indicator elment is monochrome or dichromatic LED.
4. as any described fan rotating speed display device of claim 1 to 3, wherein these a plurality of show states comprise the show state that multiple color is different.
5. as any described fan rotating speed display device of claim 1 to 3, wherein these a plurality of show states comprise the blink states that multiple frequency is different.
6. as any described fan rotating speed display device of claim 1 to 3, wherein these a plurality of show states comprise at least the show state that shows with a kind of color and at least with a kind of show state of frequency scintillation.
7. fan rotating speed display device as claimed in claim 1, wherein the digital signal of this signal output part is a continuous square signal, this change-over circuit is that a frequency conversion with this square signal is the circuit of analog voltage signal.
8. fan rotating speed display device as claimed in claim 1, wherein this control circuit is a programmable single-chip microcomputer.
9. fan rotating speed display device as claimed in claim 1, wherein this change-over circuit is a digital/analog converter.
10. fan rotating speed display device as claimed in claim 1, wherein this change-over circuit is a frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510035506A CN100591923C (en) | 2005-06-22 | 2005-06-22 | Fan rotating speed display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510035506A CN100591923C (en) | 2005-06-22 | 2005-06-22 | Fan rotating speed display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1884841A CN1884841A (en) | 2006-12-27 |
| CN100591923C true CN100591923C (en) | 2010-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510035506A Expired - Fee Related CN100591923C (en) | 2005-06-22 | 2005-06-22 | Fan rotating speed display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100591923C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200463962Y1 (en) * | 2010-04-15 | 2012-12-04 | 잘만테크 주식회사 | Fan Assembly |
| EP3496245A1 (en) * | 2012-02-08 | 2019-06-12 | Grundfos Holding A/S | Electric motor |
| CN103883546B (en) * | 2012-12-21 | 2016-08-17 | 国网山东省电力公司德州供电公司 | Rotation speed of the fan indicating circuit |
| CN104074783A (en) * | 2013-03-28 | 2014-10-01 | 鸿富锦精密电子(天津)有限公司 | Fan speed indicating circuit |
| CN105933249A (en) * | 2016-06-28 | 2016-09-07 | 成都启源电子信息技术有限公司 | Automatic detection system for Ethernet switch |
| CN107747554B (en) * | 2017-09-28 | 2019-12-06 | 珠海格力电器股份有限公司 | Electric fan and control method and device thereof |
| US11794320B2 (en) * | 2018-04-13 | 2023-10-24 | Snap-On Incorporated | System and method for indicating torque |
| TWI730640B (en) * | 2020-02-25 | 2021-06-11 | 訊凱國際股份有限公司 | Fan device, fan system, and control methods thereof |
-
2005
- 2005-06-22 CN CN200510035506A patent/CN100591923C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1884841A (en) | 2006-12-27 |
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Granted publication date: 20100224 Termination date: 20110622 |