CN107859647A - A kind of frequency-adjustable speed-adjustable interface circuit, blower fan, fan speed regulation system and speed regulating method - Google Patents
A kind of frequency-adjustable speed-adjustable interface circuit, blower fan, fan speed regulation system and speed regulating method Download PDFInfo
- Publication number
- CN107859647A CN107859647A CN201711023876.8A CN201711023876A CN107859647A CN 107859647 A CN107859647 A CN 107859647A CN 201711023876 A CN201711023876 A CN 201711023876A CN 107859647 A CN107859647 A CN 107859647A
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- Prior art keywords
- speed
- frequency
- adjustable
- micro
- control unit
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
Abstract
The embodiment of the invention discloses a kind of frequency-adjustable speed-adjustable interface circuit, blower fan, fan speed regulation system and speed regulating method, the frequency-adjustable speed-adjustable interface circuit is connected between user input apparatus and micro-control unit, user input apparatus carries out the input of speed governing numerical value by frequency-adjustable speed-adjustable interface circuit to micro-control unit, frequency-adjustable speed-adjustable interface circuit includes interface and pull-up resistor, interface includes the input interface being connected with user input apparatus, and the output interface being connected with micro-control unit；One end of pull-up resistor is connected with input interface and a circuit power, the other end is connected with output interface, for the pulse signal from user input apparatus to be transmitted to micro-control unit from output interface, to cause frequency of the micro-control unit according to pulse signal, speed governing numerical value corresponding to matching, to adjust the rotating speed of blower fan.The embodiment of the present invention can evade the influence of temperature, realize high-precision fan speed regulation, ensure that the output speed of blower fan meets the target velocity of user's requirement.
Description
Technical field
The present embodiments relate to technical field of electricity, more particularly to a kind of frequency-adjustable speed-adjustable interface circuit, blower fan, blower fan to adjust
Speed system and speed regulating method.
Background technology
It is well known that some production processes need to carry out under certain blast, air quantity, thus Fan Equipment except
Dirt, ventilation, air blast etc. are used widely.Blower fan mainly realizes ventilation, drum by motor-driven impeller operating
Wind function.
Up to the present, speed governing interface circuit, it is essential pith in blower fan application industry.Prior art
In, general speed governing interface circuit is generally variable voltage control interface circuit and adjusts dutycycle speed governing interface circuit, blower interior
The output that micro-control unit is regulated the speed by way of detecting the change of dutycycle or level.But above-mentioned general tune
The all presence of fast mode can not meet the defects of user is to the high-precision requirement of speed governing, and general mode of speed regulation can typically pass through
Digital optocoupler is isolated, and when the temperature is changed, the rising edge and trailing edge of the digital optocoupler in speed governing interface circuit can occur
Change, the speed for causing the identical input value of user to show at different temperatures is different, the final output for influenceing blower fan
Speed and the target velocity of user are inconsistent.
The content of the invention
The embodiment of the present invention provides a kind of frequency-adjustable speed-adjustable interface circuit, blower fan, fan speed regulation system and speed regulating method, with rule
The influence of temperature is kept away, realizes high-precision fan speed regulation.
To use following technical scheme up to this purpose, the present invention：
In a first aspect, the embodiment of the present invention provides a kind of frequency-adjustable speed-adjustable interface circuit, user input apparatus and micro- is connected to
Between control unit, the user input apparatus carries out speed governing by the frequency-adjustable speed-adjustable interface circuit to the micro-control unit
The input of numerical value, the frequency-adjustable speed-adjustable interface circuit include interface and pull-up resistor, and the interface includes inputting with the user
The input interface of device connection, and the output interface being connected with the micro-control unit；
One end of the pull-up resistor is connected with the input interface and a circuit power, the other end and the output interface
Connection, for the pulse signal from user input apparatus to be transmitted to micro-control unit from the output interface, to cause
Frequency of the micro-control unit according to the pulse signal is stated, speed governing numerical value corresponding to matching, to adjust the rotating speed of blower fan.
Second aspect, the embodiment of the present invention provide a kind of blower fan, including micro-control unit, in addition to above-mentioned first aspect institute
The frequency-adjustable speed-adjustable interface circuit stated；
The frequency-adjustable speed-adjustable interface circuit is connected with the micro-control unit, for handling the arteries and veins from user input apparatus
Rush signal, and by the pulse signal transmission after processing to micro-control unit；
The micro-control unit, the frequency of the pulse signal after being handled for determination, and it is corresponding according to the frequency, matching
Speed governing numerical value, to adjust the rotating speed of blower fan.
The third aspect, the embodiment of the present invention provide a kind of fan speed regulation system, including user input apparatus, in addition to above-mentioned
Blower fan described in second aspect.
Fourth aspect, the embodiment of the present invention provide a kind of fan speed regulation method, the blower fan provided using the above-mentioned third aspect
Governing system performs, and methods described includes：
User input apparatus obtains the speed governing numerical value of input, and forms pulse signal corresponding with the speed governing numerical value；
The frequency-adjustable speed-adjustable interface circuit handles the pulse signal, and by the pulse signal transmission after processing to microcontroller
Unit；
The frequency of pulse signal after the micro-control unit determination processing, and according to the frequency, match corresponding adjust
Fast numerical value, to adjust the rotating speed of blower fan.
A kind of frequency-adjustable speed-adjustable interface circuit, blower fan, fan speed regulation system and speed regulating method provided in an embodiment of the present invention, lead to
Cross the test point that pulse signal frequency is provided so that micro-control unit can detect the frequency of pulse signal in the test point,
Matching speed governing numerical value corresponding with the frequency, adjusts the rotating speed of blower fan, has not only evaded the influence of temperature so that in whole blower fan
In speed regulation process, good adjusting speed accuracy can be shown at different temperatures, realize high-precision fan speed regulation, additionally it is possible to protect
The output speed of card blower fan meets the target velocity of user's requirement.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation for frequency-adjustable speed-adjustable interface circuit that the embodiment of the present invention one provides；
Fig. 2 is a kind of structural representation for blower fan that the embodiment of the present invention two provides；
Fig. 3 is a kind of structural representation for fan speed regulation system that the embodiment of the present invention three provides；
Fig. 4 is a kind of schematic flow sheet for fan speed regulation method that the embodiment of the present invention four provides.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is a kind of structural representation for frequency-adjustable speed-adjustable interface circuit that the embodiment of the present invention one provides.As shown in figure 1,
The embodiment of the present invention provides frequency-adjustable speed-adjustable interface circuit, carrys out setting speed by using the different frequency change of pulse signal, carries
For the test point of pulse signal frequency so that micro-control unit can detect the frequency of pulse signal in the test point, matching
Speed governing numerical value corresponding with the frequency, the rotating speed of blower fan is adjusted, it is unstable to solve fan speed regulation precision at different temperatures
Problem.
The frequency-adjustable speed-adjustable interface circuit, is connected between user input apparatus and micro-control unit, user's input
Device carries out the input of speed governing numerical value by the frequency-adjustable speed-adjustable interface circuit to the micro-control unit, and the frequency-adjustable speed-adjustable connects
Mouth circuit includes interface and pull-up resistor, and the interface includes the input interface being connected with the user input apparatus, Yi Jiyu
The output interface of the micro-control unit connection；
One end of the pull-up resistor 12 is connected with the circuit power of input interface 11 and one, the other end and the output
Interface 13 connects, for the pulse signal from user input apparatus to be transmitted to micro-control unit from the output interface 13,
To cause frequency of the micro-control unit according to the pulse signal, speed governing numerical value corresponding to matching, to adjust turning for blower fan
Speed.
It should be noted that carried out between user input apparatus and frequency-adjustable speed-adjustable interface circuit by wired communication mode
Connection.Wherein, user input apparatus refers to the input equipment for being supplied to user to use, and user can be incited somebody to action by the input equipment
Initial data is input to blower fan system by frequency-adjustable speed-adjustable interface, enters row information with the micro-control unit in blower fan system to realize
Exchange.In general input equipment includes：Keyboard, mouse, writing input board or speech input device etc..
In one embodiment, it is preferred that digital optocoupler is provided with the power input of frequency-adjustable speed-adjustable interface circuit
14, in frequency-adjustable speed-adjustable interface circuit, input one current-limiting resistance 15 of series connection of the digital optocoupler 14, connect with input interface
Connect, and output end is connected with the control loop of frequency-adjustable speed-adjustable interface circuit, plays buffer action so that segregate this two parts electricity
Do not have between road electricity be directly connected to, prevent because have electricity connection caused by interference, especially for low pressure control circuit and
Between external high pressure circuit.In addition, digital optocoupler 14 is additionally operable to be converted into the pulse signal to meet micro-control unit voltage
It is required that pulse signal.
Specifically, the input of digital optocoupler connects a photophore (infrared light-emitting diode LED), output end connection
One light-receiving device (photosensitive semiconductor pipe), when input has electric signal, photophore emits beam, and light-receiving device is receiving light letter
Turned on after number, produce photoelectric current, flowed out from output end.The photophore of digital optocoupler includes two input pins (anode and the moon
Pole), an input pin (anode) is connected with input interface, another input pin (negative electrode) ground connection；Light-receiving device is also defeated including two
Go out pin (collector and emitter), an output pin (colelctor electrode) is connected with a circuit power and pull-up resistor, another defeated
Go out pin (emitter stage) series resistance ground connection.Wherein, the input pin (anode) of digital optocoupler and output pin (emitter stage) make
With different ground, using isolation, mutual interference can be avoided.The effect of pull-up resistor is branch current where limitation
Size, and improve the driving force of the I/O mouths of the micro-control unit.The circuit power for being connected to the output end of digital optocoupler is adopted
With 3.3VDC so that the output signal of digital optocoupler is to meet the level signal of micro-control unit voltage request.
It should be noted that in the present embodiment, frequency-adjustable speed-adjustable interface circuit is also configured with other electronic components and its matched somebody with somebody
Circuit, such as band resistance triode, triode, electric capacity and resistance etc. are closed, effect is to eliminate error, improves response speed, the circuit
Design in the prior art more realization, nor the emphasis of this programme design, does not do deep elaboration herein.
A kind of frequency-adjustable speed-adjustable interface circuit provided in an embodiment of the present invention, by providing the test point of pulse signal frequency,
Enable micro-control unit to detect the frequency of pulse signal in the test point, match speed governing numerical value corresponding with the frequency,
The rotating speed of blower fan is adjusted, has not only evaded the influence of temperature so that during whole fan speed regulation, at different temperatures can
Good adjusting speed accuracy is shown, realizes high-precision fan speed regulation, additionally it is possible to ensures that the output speed of blower fan meets user and wanted
The target velocity asked.
Embodiment two
Referring to Fig. 2, the embodiment of the present invention provides a kind of blower fan, including micro-control unit 22, in addition to above-described embodiment
The one frequency-adjustable speed-adjustable interface circuit 21 provided；
The frequency-adjustable speed-adjustable interface circuit 21 is connected with the micro-control unit 22, and user input apparatus is come from for handling
Pulse signal, and by the pulse signal transmission after processing to micro-control unit 22；
The micro-control unit 22, the frequency of the pulse signal after being handled for determination, and according to the frequency, matching pair
The speed governing numerical value answered, to adjust the rotating speed of blower fan.
On the basis of above-mentioned technical proposal, it is preferred that the blower fan that the present embodiment provides also includes motor.
Micro-control unit and motor connection, the speed governing of user's requirement is obtained according to the frequency of pulse signal in micro-control unit
After numerical value, micro-control unit will generate control instruction, reach the requirement of user with the work of controlled motor.
Blower fan provided in an embodiment of the present invention, carry out setting speed by using the different frequency change of pulse signal, there is provided
The test point of pulse signal frequency so that micro-control unit can detect the frequency of pulse signal in the test point, matching with
Speed governing numerical value corresponding to the frequency, the rotating speed of blower fan is adjusted, has not only evaded the influence of temperature so that in whole fan speed regulation mistake
Cheng Zhong, good adjusting speed accuracy can be shown at different temperatures, realize high-precision fan speed regulation, additionally it is possible to ensure blower fan
Output speed meet user requirement target velocity.
Embodiment three
Referring to Fig. 3, the embodiment of the present invention provides a kind of fan speed regulation system, including user input apparatus 31, in addition to
The blower fan 32 that above-described embodiment two provides.
Preferably, the fan speed regulation system also includes externally fed power supply；
The externally fed power supply is connected with the fan speed regulation system, for providing electric energy for whole system.
It should be noted that the externally fed power supply can be powered stable 220V standard household AC electricals or dc-battery
Group, depending on actual demand.
Fan speed regulation system provided in an embodiment of the present invention, change by using the different frequency of pulse signal and turn to set
Speed, by the test point for providing pulse signal frequency so that micro-control unit can detect pulse signal in the test point
Frequency, speed governing numerical value corresponding with the frequency is matched, the rotating speed of blower fan is adjusted, has not only evaded the influence of temperature so that whole
During individual fan speed regulation, good adjusting speed accuracy can be shown at different temperatures, realizes high-precision fan speed regulation, also
It can ensure that the output speed of blower fan meets the target velocity of user's requirement.
Example IV
A kind of referring to Fig. 4, schematic flow sheet of the fan speed regulation method provided for the embodiment of the present invention four.This method by
The fan speed regulation system that the embodiment of the present invention is provided performs, and step is as follows：
S401, user input apparatus obtain the speed governing numerical value of input, and form pulse letter corresponding with the speed governing numerical value
Number.
It should be noted that the scope of the speed governing numerical value of user's input is 10kHz~100kHz.
S402, the frequency-adjustable speed-adjustable interface circuit processing pulse signal, and by the pulse signal transmission after processing extremely
Micro-control unit.
It should be noted that the processing of frequency-adjustable speed-adjustable circuit pulse signals refers to that the isolation of digital optocoupler and level turn
Change, the voltage of processing afterpulse signal is essentially pulled up to 3.3V, meets MCU operating voltage, but its frequency and pulse width information are constant.
The frequency of pulse signal after S403, micro-control unit determination processing, and it is corresponding according to the frequency, matching
Speed governing numerical value, to adjust the rotating speed of blower fan.
It should be noted that the memory storage in blower fan system has the frequency pre-set and speed governing numerical comparatives table.
When user inputs speed governing numerical value by user input apparatus, can finally be provided to micro-control unit reception is a kind of different frequency
Pulse signal after treatment, micro-control unit is by calling the frequency and speed governing numerical comparatives table, it may be determined that with place
The speed governing numerical value of the frequency matching of pulse signal after reason.
Fan speed regulation method provided in an embodiment of the present invention, change by using the different frequency of pulse signal and turn to set
Speed, there is provided the test point of pulse signal frequency so that micro-control unit can detect the frequency of pulse signal in the test point,
Corresponding with the frequency speed governing numerical value of matching, the rotating speed of blower fan is adjusted, can reach and evade temperature digital optocoupler is impacted
Purpose so that during whole fan speed regulation, good adjusting speed accuracy can be shown at different temperatures, realized high-precision
The fan speed regulation of degree, additionally it is possible to ensure that the output speed of blower fan meets the target velocity of user's requirement.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (4)
1. a kind of frequency-adjustable speed-adjustable interface circuit, is connected between user input apparatus and micro-control unit, the user inputs dress
Put the input for carrying out speed governing numerical value to the micro-control unit by the frequency-adjustable speed-adjustable interface circuit, the frequency-adjustable speed-adjustable interface
Circuit includes interface and pull-up resistor, and the interface includes the input interface being connected with the user input apparatus, and with institute
State the output interface of micro-control unit connection, it is characterised in that：
One end of the pull-up resistor is connected with the input interface and a circuit power, and the other end connects with the output interface
Connect, it is described to cause for the pulse signal from user input apparatus to be transmitted to micro-control unit from the output interface
Micro-control unit is according to the frequency of the pulse signal, speed governing numerical value corresponding to matching, to adjust the rotating speed of blower fan.
2. a kind of blower fan, including micro-control unit, it is characterised in that also including frequency-adjustable speed-adjustable interface as claimed in claim 1
Circuit；
The frequency-adjustable speed-adjustable interface circuit is connected with the micro-control unit, for handling the pulse letter from user input apparatus
Number, and by the pulse signal transmission after processing to micro-control unit；
The micro-control unit, the frequency of the pulse signal after being handled for determination, and according to the frequency, match corresponding adjust
Fast numerical value, to adjust the rotating speed of blower fan.
3. a kind of fan speed regulation system, including user input apparatus, it is characterised in that also including wind as claimed in claim 2
Machine.
4. a kind of fan speed regulation method, performed using the fan speed regulation system described in claim 3, it is characterised in that the side
Method includes：
User input apparatus obtains the speed governing numerical value of input, and forms pulse signal corresponding with the speed governing numerical value；
The frequency-adjustable speed-adjustable interface circuit handles the pulse signal, and by the pulse signal transmission after processing to microcontroller list
Member；
The frequency of pulse signal after the micro-control unit determination processing, and according to the frequency, speed governing number corresponding to matching
Value, to adjust the rotating speed of blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023876.8A CN107859647B (en) | 2017-10-27 | 2017-10-27 | Frequency modulation speed regulation interface circuit, fan speed regulation system and speed regulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023876.8A CN107859647B (en) | 2017-10-27 | 2017-10-27 | Frequency modulation speed regulation interface circuit, fan speed regulation system and speed regulation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107859647A true CN107859647A (en) | 2018-03-30 |
| CN107859647B CN107859647B (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711023876.8A Active CN107859647B (en) | 2017-10-27 | 2017-10-27 | Frequency modulation speed regulation interface circuit, fan speed regulation system and speed regulation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490966U (en) * | 2009-05-11 | 2010-05-26 | 中国人民解放军总后勤部建筑工程研究所 | Speed-adjusting inversion control device for power generating set |
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN203027198U (en) * | 2013-01-02 | 2013-06-26 | 宁波齐心电子有限公司 | Optocoupler-isolated practical voltage regulating and speed regulating circuit |
| CN203146378U (en) * | 2012-11-30 | 2013-08-21 | 杭州顿力电器有限公司 | Isolated property speed regulation circuit for outer rotor electronic control type air blowers |
-
2017
- 2017-10-27 CN CN201711023876.8A patent/CN107859647B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490966U (en) * | 2009-05-11 | 2010-05-26 | 中国人民解放军总后勤部建筑工程研究所 | Speed-adjusting inversion control device for power generating set |
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN203146378U (en) * | 2012-11-30 | 2013-08-21 | 杭州顿力电器有限公司 | Isolated property speed regulation circuit for outer rotor electronic control type air blowers |
| CN203027198U (en) * | 2013-01-02 | 2013-06-26 | 宁波齐心电子有限公司 | Optocoupler-isolated practical voltage regulating and speed regulating circuit |
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| Publication number | Publication date |
|---|---|
| CN107859647B (en) | 2020-01-10 |
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