CN106151087A - A kind of fan stall observation circuit - Google Patents
A kind of fan stall observation circuit Download PDFInfo
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- CN106151087A CN106151087A CN201510205627.5A CN201510205627A CN106151087A CN 106151087 A CN106151087 A CN 106151087A CN 201510205627 A CN201510205627 A CN 201510205627A CN 106151087 A CN106151087 A CN 106151087A
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- resistance
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- stall
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Abstract
The open a kind of fan stall observation circuit of the present invention, including resistance R1, diode D1, audion V1 and buzzer B, one end of described resistance R1 connects the pin 2 of the other end connection electric capacity C1 and Hall element A of resistance R2, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, the pin 1 of Hall element A, the pin 8 of chip IC 1 and power supply VCC, resistance R1.Fan stall observation circuit of the present invention uses Hall element collecting device fan inside rotary speed information, and be converted into pulse signal and monitor in real time, once occur that rotation speed of the fan reduction is excessive or stall will start buzzer and send chimes of doom prompting user inspection fan situation, avoid the loss caused because of fan stall, circuit is simple simultaneously, components and parts are few, easy to use.
Description
Technical field
The present invention relates to a kind of observation circuit, specifically a kind of fan stall observation circuit.
Background technology
Fan is the instrument of the essential heat radiation of a lot of electrical equipment, is most commonly that refrigerator, air-conditioning and computer, this kind equipment
Operationally can produce substantial amounts of heat, can not get heat radiation for a long time and can cause work efficiency reduction, component aging aggravation,
Even instrument burns, and therefore the normal work of fan seems extremely important, but the radiator fan of this kind equipment major part is setting
Standby internal, quit work even if breaking down, user also is difficult to notice, thus causes economic loss, and just delays
Normal work.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, practical fan stall observation circuit, to solve the above-mentioned back of the body
The problem proposed in scape technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of fan stall observation circuit, including resistance R1, diode D1, audion V1 and buzzer B, described resistance
One end of R1 connects resistance R2, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, Hall element A
The other end of pin 1, the pin 8 of chip IC 1 and power supply VCC, resistance R1 connects electric capacity C1's and Hall element A
Pin 2, the other end of electric capacity C1 connects the other end and the other end connecting triode of resistance R6, resistance R6 of resistance R2
The base stage of V1, the emitter stage connection other end of resistance R3, electric capacity C2 and the pin 3 of chip IC 1 of audion V1, three
The colelctor electrode of pole pipe V1 connects resistance R7, the other end of electric capacity C2, the anode of diode D2, the drawing of Hall element A
The pin 1 of foot 3 and chip IC 1 ground connection, the other end of resistance R4 connects the other end of resistance R7 and drawing of chip IC 1
Foot 2, the pin 7 of chip IC 1 connects buzzer B and the negative electrode of diode D2, and the other end of buzzer B connects resistance
The other end of R5.
Preferred version as the present invention: the model of described chip IC 1 is LM311.
Preferred version as the present invention: described power supply VCC is 12V unidirectional current.
Compared with prior art, the invention has the beneficial effects as follows: fan stall observation circuit of the present invention uses Hall element to adopt
Collection device interior rotation speed of the fan information, and be converted into pulse signal and monitor in real time, once occur that rotation speed of the fan reduces excessive
Or stall will start buzzer and send chimes of doom prompting user inspection fan situation, it is to avoid the damage caused because of fan stall
Losing, circuit is simple simultaneously, components and parts are few, easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of fan stall observation circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly and completely
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, broadly fall into the scope of protection of the invention.
Referring to Fig. 1, a kind of fan stall observation circuit, including resistance R1, diode D1, audion V1 and buzzer
One end of B, described resistance R1 connects resistance R2, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1, suddenly
The other end of your pin 1 of sensors A, the pin 8 of chip IC 1 and power supply VCC, resistance R1 connects electric capacity C1 and suddenly
The pin 2 of your sensors A, the other end of electric capacity C1 connects another of the other end of resistance R2 and resistance R6, resistance R6
The base stage of end connecting triode V1, the emitter stage of audion V1 connects the other end of resistance R3, electric capacity C2 and chip IC 1
Pin 3, the colelctor electrode of audion V1 connects resistance R7, the other end of electric capacity C2, the anode of diode D2, Hall
The pin 1 of the pin 3 of sensors A and chip IC 1 ground connection, the other end of resistance R4 connect resistance R7 the other end and
The pin 2 of chip IC 1, the pin 7 of chip IC 1 connects buzzer B and the negative electrode of diode D2, another of buzzer B
End connects the other end of resistance R5.
The model of chip IC 1 is LM311.
Power supply VCC is 12V unidirectional current.
The operation principle of the present invention is: power supply VCC after resistance R4, resistance R7 dividing potential drop for comparator IC1 2 feet provide
The voltage of 0.773V.Hall element A is used for gathering fan rotating speed signals and being converted into pulse signal, and electric fan normally works
Time, Hall element A is to the square-wave pulse of circuit input end input certain frequency.Two pulses of output of electric fan each rotation.
When low pulse arrives, electric capacity C2 charges to electric capacity C1 through audion V1 and resistance R6, and audion V1 turns on, quickly
Being fallen by the charge discharging resisting of electric capacity C2, the voltage of the pin 2 of comparator IC1 is less than the voltage of pin 1, then comparator IC1
Pin 7 export high level, buzzer B does not cries.Power supply VCC charges to electric capacity C1 through resistance R2 simultaneously, and V1 is quickly
Cut-off, VCC starts slowly to charge to electric capacity C2 through resistance R3；When electric fan is to the upper jump pulse of circuit input, electric capacity
C1 discharges through diode D1, resistance R1, and V1 keeps cut-off state simultaneously, and resistance R3 continues slowly to fill to electric capacity C2
Electricity；When next low pulse arrives, V1 turns on again, is quickly released by the electric charge on C2 again, and circuit repeats above mistake
Journey.If electric fan stall, what Hall element A inputted to circuit is permanent High level, after V1 cut-off, through in short-term
Between time delay, pin 3 voltage of comparator IC1 is higher than the voltage of pin 2, comparator output low level, VCC warp
Resistance R5 powers to buzzer B, buzzer B continue toot cry, carry out stall alarm, circuit uses Hall element collection
Device interior rotation speed of the fan information, and be converted into pulse signal and monitor in real time, once occur rotation speed of the fan reduce excessive or
Person's stall will start buzzer and send chimes of doom prompting user inspection fan situation, it is to avoid the damage caused because of fan stall
Losing, circuit is simple simultaneously, components and parts are few, easy to use.
Claims (3)
1. a fan stall observation circuit, including resistance R1, diode D1, audion V1 and buzzer B；Its feature
Be, one end of described resistance R1 connect resistance R2, resistance R3, resistance R4, resistance R5, the negative electrode of diode D1,
The other end of the pin 1 of Hall element A, the pin 8 of chip IC 1 and power supply VCC, resistance R1 connect electric capacity C1 and
The pin 2 of Hall element A, the other end of electric capacity C1 connects the other end and the resistance R6 of resistance R2, and resistance R6's is another
The base stage of one end connecting triode V1, the emitter stage of audion V1 connects the other end of resistance R3, electric capacity C2 and chip IC 1
Pin 3, the colelctor electrode of audion V1 connects resistance R7, the other end of electric capacity C2, the anode of diode D2, Hall
The pin 1 of the pin 3 of sensors A and chip IC 1 ground connection, the other end of resistance R4 connect resistance R7 the other end and
The pin 2 of chip IC 1, the pin 7 of chip IC 1 connects buzzer B and the negative electrode of diode D2, another of buzzer B
End connects the other end of resistance R5.
A kind of fan stall observation circuit the most according to claim 1, it is characterised in that the model of described chip IC 1
For LM311.
A kind of fan stall observation circuit the most according to claim 1, it is characterised in that described power supply VCC is 12V
Unidirectional current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205627.5A CN106151087A (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510205627.5A CN106151087A (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106151087A true CN106151087A (en) | 2016-11-23 |
Family
ID=57347431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510205627.5A Pending CN106151087A (en) | 2015-04-27 | 2015-04-27 | A kind of fan stall observation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106151087A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173455A (en) * | 2019-06-27 | 2019-08-27 | 徐州工业职业技术学院 | A kind of projector multi-function protector |
| CN110657122A (en) * | 2019-10-11 | 2020-01-07 | 锐捷网络股份有限公司 | Fan rotating speed detection circuit and electronic equipment |
| CN114184805A (en) * | 2021-11-19 | 2022-03-15 | 浪潮(山东)计算机科技有限公司 | Speed measuring device |
-
2015
- 2015-04-27 CN CN201510205627.5A patent/CN106151087A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173455A (en) * | 2019-06-27 | 2019-08-27 | 徐州工业职业技术学院 | A kind of projector multi-function protector |
| CN110657122A (en) * | 2019-10-11 | 2020-01-07 | 锐捷网络股份有限公司 | Fan rotating speed detection circuit and electronic equipment |
| CN114184805A (en) * | 2021-11-19 | 2022-03-15 | 浪潮(山东)计算机科技有限公司 | Speed measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |