CN206989992U - A kind of blower fan dynamic performance parameter measuring system - Google Patents
A kind of blower fan dynamic performance parameter measuring system Download PDFInfo
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- CN206989992U CN206989992U CN201720616703.6U CN201720616703U CN206989992U CN 206989992 U CN206989992 U CN 206989992U CN 201720616703 U CN201720616703 U CN 201720616703U CN 206989992 U CN206989992 U CN 206989992U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
Blower fan dynamic performance parameter measuring system of the present utility model, including the resistance strain gage R3 being arranged on blower fan, reference resistance foil gauge R8 and controller on circuit boards is set, described controller includes control chip and its peripheral circuit, resistance strain gage R3 and reference resistance foil gauge R8 electrically connects variable connector by a difference channel respectively, variable connector is controlled by control chip, and filter integration amplifying circuit is connected by differential amplifier circuit, filter integration amplification circuit output end connects A/D ports and the comparator circuit input of control chip respectively, comparator circuit output end connects control chip pulsewidth and obtains port and external interrupt port respectively, reference voltage circuit provides stable reference voltage for whole system.The system is based on good digital controller, and the pressure of operation blower fan, air quantity, rotary speed parameter are measured in real time with reference to peripheral Analogic Electronic Circuits.
Description
Technical field
It the utility model is related to fan condition monitoring field, and in particular to one kind is applied to blower fan dynamic performance parameter and measured
System.
Background technology
The Specifeca tion speeification of blower fan has air quantity, blast, rotating speed, specific speed, power etc., these parameters also substantially on be
It is measured before dispatching from the factory, still, among actual motion, the real-time measurement of these major parameters of blower fan is extremely important
, such as the ventilation of mine, it is necessary to timely and accurately grasp the main dash parameter in underground -- air quantity, blast situation, it is ensured that
The safety of staff.In addition, other operating modes are also required to fan parameter, Optimization of Energy Saving control is realized in detection in real time.
According to《Fan test operational procedure》Realize and blower fan various parameters are measured, even manufacturer wants the scene of building
Pilot production place is also more difficult, for example survey air quantity needs to choose 6-8 point.Blower fan various parameters are measured, it is necessary to all kinds of instrument
Instruments and meters：Such as revolution counter, sylphon pressure gauge, pincerlike meter, Pitot tube, multrirange tilting micromanometer, all kinds of instrument of U-shaped pressure pipe
Table and sensor.These or similar instrument application, difficulty is very big in design and operation, and cost is very high, and can not be formed automatic
Change monitoring system.
The important parameter of some important events such as mine fan realizes real-time monitoring at present, but with anemobiagraph, pressure
The instrument such as instrument and sensor group are into monitoring system, and cost is very high, and centering small-sized fan is carried out using conventional instrument and sensor
Measurement, then monitoring system is formed with industrial computer or programmable controller, the cost of general fan monitoring system is high compared with blower fan,
Some exceedes several times of the cost of blower fan.The operational factor monitoring and protection of the middle-size and small-size blower fan of insignificant occasion are typically using letter
Single temperature on the spot and vibration monitoring, can not accurate measurement blower fan major parameter.
Utility model content
In order to solve the above problems, the utility model provides a kind of relatively low and easy to use blower fan dynamic property of cost
Parameter measurement system, the system are based on good digital controller, using the quick sampling A/D inside high performance controller,
The functions such as high frequency external is interrupted, capture high frequency pulse width circuit, with reference to pressure of the peripheral Analogic Electronic Circuits to operation blower fan, wind
Amount, rotary speed parameter are measured in real time.
The utility model uses following technical scheme：
A kind of blower fan dynamic performance parameter measuring system, including be arranged on blower fan resistance strain gage R3, be arranged on electricity
Reference resistance foil gauge R8, multi-way switch circuit, differential amplifier circuit, filter integration amplifying circuit, comparator electricity on the plate of road
Road, reference voltage circuit and controller, described controller include control chip and its peripheral circuit, resistance strain gage R3 and base
Quasi- resistance strain gage R8 electrically connects variable connector by a difference channel respectively, and variable connector is controlled by control chip, and is led to
Differential amplifier circuit connection filter integration amplifying circuit is crossed, filter integration amplification circuit output end connects the A/ of control chip respectively
D ports and comparator circuit input, comparator circuit output end connect control chip pulsewidth and obtain port and outside respectively
Interruptive port, reference voltage circuit provide stable reference voltage for whole system.
Preferably, the control chip uses STM32F047 digital signal controllers.
Further, described reference voltage circuit includes chip U2, and chip U2 uses ref3012 chips, voltage chips
The pins of U2 first are grounded, and voltage chips U2 second pin connects+5V DC voltages, and connect respectively polar capacitor C8 positive poles and
Electric capacity C9 one end, polar capacitor C8 negative poles and the electric capacity C9 other ends are grounded, and the pins of voltage chips U2 the 3rd connect clamped respectively
Diode D1 one end, polar capacitor C1 positive poles, electric capacity C2 one end, the catching diode D1 other ends, polar capacitor C1 negative poles, electric capacity
The C2 other ends are grounded.
Further, described multi-way switch circuit includes chip U3, and chip U3 uses CD4052 chips, chip U3 the 6th
Pin and the 8th pin are grounded, and the pins of chip U3 the 16th connect+5V DC voltages, the pins of chip U3 the 3rd and the 13rd pin
Differential amplifier circuit is connect, the pins of chip U3 the 7th connect -5V voltages and connect polar capacitor C22 negative poles, electric capacity C23 one end, pole respectively
Property electric capacity C22 positive poles, the electric capacity C23 other ends are grounded.
Further, the difference channel between the resistance strain gage R3 and variable connector is the first difference channel, described
The first difference channel include resistance R1, resistance R1 mono- terminates reference voltage output end, i.e. chip U2 the 3rd pin, resistance R1
The other end connects electric capacity C3 one end, electric capacity C5 one end, resistance R2 one end, resistance strain gage R3 one end, another terminations of electric capacity C3 respectively
Ground, the electric capacity C5 other ends difference connecting resistance foil gauge R3 other ends, electric capacity C6 one end, resistance R4 one end, resistance R5 one end, electric capacity
The C6 other ends, the resistance R4 other ends are grounded, and the resistance R5 other ends connect electric capacity C7 one end and the pins of chip U3 the 12nd respectively, electricity
Hold C7 other ends ground connection, the resistance R2 other ends connect electric capacity C4 one end and the pins of chip U3 first, electric capacity C4 other ends ground connection respectively.
Further, the difference channel between the reference resistance foil gauge R8 and variable connector is the second difference channel,
The second described difference channel includes resistance R6, and resistance R6 mono- terminates reference voltage output end, i.e. chip U2 the 3rd pin, electricity
The resistance R6 other ends connect electric capacity C12 one end, electric capacity C10 one end, resistance R7 one end, reference resistance foil gauge R8 one end, electric capacity respectively
The C10 other ends are grounded, and the electric capacity C12 other ends meet the reference resistance foil gauge R8 other ends, electric capacity C13 one end, resistance R9 mono- respectively
End, resistance R10 one end, the electric capacity C13 other ends, the resistance R9 other ends are grounded, and the resistance R10 other ends meet electric capacity C14 mono- respectively
End and the pins of chip U3 the 14th, electric capacity C14 other ends ground connection, the resistance R7 other ends connect electric capacity C11 one end and chip U3 respectively
5th pin, electric capacity C11 other ends ground connection.
Further, described differential amplifier circuit includes chip U4, and chip U4 uses difference amplifier AD620, chip
Resistance R11 is provided between the pins of U4 first and the 8th pin, the pins of chip U4 the 3rd are grounded by electric capacity C17, and chip U4
Three pins connect the pins of chip U3 the 3rd, and chip U4 second pins are grounded by electric capacity C25, and chip U4 second pins meet chip U3
13rd pin, the pins of chip U4 the 4th connect -5V voltages, electric capacity C20 one end, polar capacitor C21 negative poles respectively, and electric capacity C20 is another
One end, polar capacitor C21 positive poles and the pins of chip U4 the 5th are grounded, and the pins of chip U4 the 6th connect filter integration amplification electricity
Road, the pins of chip U4 the 7th connect polar capacitor C16 positive poles ,+5V voltages, electric capacity C15 one end, polar capacitor C16 negative poles, electricity respectively
Hold the C15 other ends to be grounded.
Further, described filter integration amplifying circuit includes chip U5, and chip U5 uses operational amplifier
MAX4416, chip U5 second pin difference connecting resistance R14 one end, electric capacity C30 one end, resistance R14 one end meets electric capacity C27 respectively
One end, the pins of chip U5 first, the electric capacity C27 other ends connect the electric capacity C30 other ends, resistance R15 one end, resistance R18 one end respectively,
Another termination differential amplifier circuits of resistance R15, resistance R18 other ends ground connection；The pins of chip U5 the 3rd are grounded；Chip U5 the 8th draws
Pin connects+5V voltages, polar capacitor C29 positive poles, electric capacity C28 one end respectively, and polar capacitor C29 negative poles, the electric capacity C28 other ends connect
Ground；The pins of chip U5 the 4th connect -5V voltages, electric capacity C32 one end, polar capacitor C33 negative poles, the electric capacity C32 other ends, polarity respectively
Electric capacity C33 positive poles are grounded；The pins of chip U5 first connect respectively the pin of control chip the 27th and and comparator circuit it is defeated
Enter end.
Further, described comparator circuit includes chip U6, and chip U6 uses high-frequency amplifier MAX987, and second draws
Pin difference connecting resistance R19 one end, electric capacity C34 one end, resistance R17 one end, the resistance R19 other ends, the electric capacity C34 other ends connect
Ground, another pins of chip termination U5 first of resistance R17；The pins of chip U6 the 3rd difference connecting resistance R16 one end, resistance R13 one end,
Another pins of chip termination U5 first of resistance R16, the resistance R13 other ends meet the pin of control chip the 31st, chip U6 respectively
6th pin；The pins of chip U6 the 4th are grounded；The pins of chip U6 the 6th connect voltage-regulator diode D2 negative poles, control chip the 8th respectively
12 pins, polar capacitor C35 positive poles, voltage-regulator diode D2 positive poles, polar capacitor C35 negative poles are grounded；Chip U6 the 7th draws
Pin connects+5V voltages, polar capacitor C31 positive poles, polar capacitor C31 negative poles ground connection respectively.
The beneficial effects of the utility model are：
1st, the system built-up circuit of the utility model is simple, and cost is low, digitlization, intelligent height.Using the control chip
Being equipped with routine with circuit facilitates peripheral circuit to form instrument and functional module, realizes digitlization display, data transfer, intelligence control
The modes such as system；Fan industry safety, energy-conserving and environment-protective, high-efficiency operation are played using the instrument or module of circuit composition important
Effect.
2nd, variable connector uses CD4052, reserves port for standby resistance strain gage, can support two groups of standby electricities simultaneously
Hinder foil gauge, it is ensured that at any time, at least one group of resistance strain gage can be greatly improved whole with normal work on blower fan
The stability of system.
3rd, comparator circuit uses dynamic comparer, and principle is to convert cut off value as extreme value using C34, i.e., when signal one
Straight ascent stage input signal is positive signal, is negative signal when signal is in decline stage input signal, is formed with signal
The square-wave pulse of fluctuation.Meanwhile in order to eliminate shake, powered up in pulse output end and hold C35, it is ensured that the authenticity of square wave.
Brief description of the drawings
Fig. 1 is Tthe utility model system theory structure block diagram；
Fig. 2 is the circuit theory diagrams of controller in Tthe utility model system；
Fig. 3 is the circuit theory diagrams outside Tthe utility model system removal controller.
Embodiment
As shown in figure 1, the utility model provides a kind of blower fan dynamic performance parameter measuring system to implement extension set
The function of parameter measurement, whole system include resistance strain gage R3, the benchmark electricity of setting on circuit boards being arranged on blower fan
Hinder foil gauge R8, multi-way switch circuit, differential amplifier circuit, filter integration amplifying circuit, comparator circuit, reference voltage circuit
And controller, described controller include control chip and its peripheral circuit, resistance strain gage R3 and reference resistance foil gauge R8
Variable connector is electrically connected by a difference channel respectively, variable connector is controlled by control chip, and passes through differential amplifier circuit
Filter integration amplifying circuit is connected, filter integration amplification circuit output end connects the A/D ports of control chip and compared respectively
Device circuit input end, comparator circuit output end connect control chip pulsewidth and obtain port and external interrupt port, benchmark respectively
Potential circuit provides stable reference voltage for whole system.
The function realization principle of whole system is：Resistance strain gage R3 is after constant pressure partial pressure difference channel by differential amplification
Device is amplified, then filtered integration amplification forms smooth curve, and the curve signal is divided into two-way：One route data signal control
Device processed is carried out at high speed sampling, and CPU tries to achieve partial pressure according to series of algorithms；Another way enters dynamic comparer and forms square wave, number
Word signal controller can pass through data signal control by external interrupt caused by square wave in the hope of change frequency, the pulsewidth of square wave
Device processed is tried to achieve.Can be in the hope of the blast of blower fan, wind speed, air quantity, rotating speed according to these parameters.Meanwhile to realize self calibration, in electricity
Design and blower fan resistance strain gage R3 identicals reference resistance foil gauge R8 are as periodic calibration circuit on road.
During specific implementation, the utility model employs physical circuit as shown in Figures 2 and 3, is used as whole
The specific implementation structure of individual system.
The control chip uses STM32F047 digital signal controllers, control chip the 94th, 37,20,10,27,
74th, 99 pins are grounded, control chip the 100th, 75,50,28,22,21,19,11,6 pins connect 3.3V DC voltages；Control
The peripheral circuit of coremaking piece includes source crystal oscillator Y1, electric capacity C18, electric capacity C19, and the 3rd pin for having source crystal oscillator Y1 connects control chip
The 12nd pin, the 4th pin for having source crystal oscillator Y1 directly connects 3.3V DC voltages, has the pins of source crystal oscillator Y1 the 4th to pass through electricity
Resistance R12 connects the pin of control chip the 14th, has source crystal oscillator Y1 second pins by connecing 3.3V DC voltages by electric capacity C26, has
Source crystal oscillator Y1 second pins connect the pin of control chip the 14th by electric capacity C24, and have source crystal oscillator Y1 second pins to be directly grounded；
Electric capacity C18 mono- terminates the pin of control chip the 73rd, electric capacity C18 other ends ground connection；Electric capacity C19 mono- terminates control chip the 4th
19 pins, electric capacity C19 other ends ground connection.
Reference voltage circuit includes chip U2, and chip U2 uses ref3012 chips, and the pins of voltage chips U2 first are grounded,
Voltage chips U2 second pin connects+5V DC voltages, and connects polar capacitor C8 positive poles and electric capacity C9 one end, polarity respectively
Electric capacity C8 negative poles and the electric capacity C9 other ends are grounded, and the pins of voltage chips U2 the 3rd connect catching diode D1 one end, pole respectively
Property electric capacity C1 positive poles, electric capacity C2 one end, the catching diode D1 other ends, polar capacitor C1 negative poles, the electric capacity C2 other ends are grounded.
Multi-way switch circuit includes chip U3, and chip U3 uses CD4052 chips, the pins of chip U3 the 6th and the 8th pin
It is grounded, the pins of chip U3 the 16th connect+5V DC voltages, and the pins of chip U3 the 3rd and the 13rd pin connect differential amplification electricity
Road, the pins of chip U3 the 7th connect -5V voltages and connect polar capacitor C22 negative poles, electric capacity C23 one end respectively, and polar capacitor C22 is just
Pole, the electric capacity C23 other ends are grounded.
Difference channel between resistance strain gage R3 and variable connector is the first difference channel, the first described difference channel
Reference voltage output end is terminated including resistance R1, resistance R1 mono-, i.e. chip U2 the 3rd pin, the resistance R1 other ends connects electricity respectively
Hold C3 one end, electric capacity C5 one end, resistance R2 one end, resistance strain gage R3 one end, electric capacity C3 other ends ground connection, the electric capacity C5 other ends
The connecting resistance foil gauge R3 other ends, electric capacity C6 one end, resistance R4 one end, resistance R5 one end respectively, the electric capacity C6 other ends, resistance R4
The other end is grounded, and the resistance R5 other ends connect electric capacity C7 one end and the pins of chip U3 the 12nd respectively, and the electric capacity C7 other ends are grounded,
The resistance R2 other ends connect electric capacity C4 one end and the pins of chip U3 first, electric capacity C4 other ends ground connection respectively.
Difference channel between reference resistance foil gauge R8 and variable connector is the second difference channel, the second described difference
Circuit includes resistance R6, and resistance R6 mono- terminates reference voltage output end, i.e. chip U2 the 3rd pin, resistance R6 other ends difference
Electric capacity C12 one end, electric capacity C10 one end, resistance R7 one end, reference resistance foil gauge R8 one end are connect, the electric capacity C10 other ends are grounded,
The electric capacity C12 other ends connect the reference resistance foil gauge R8 other ends, electric capacity C13 one end, resistance R9 one end, resistance R10 one end respectively,
The electric capacity C13 other ends, the resistance R9 other ends are grounded, and the resistance R10 other ends connect electric capacity C14 one end and chip U3 the 14th respectively
Pin, electric capacity C14 other ends ground connection, the resistance R7 other ends meet electric capacity C11 one end and the pins of chip U3 the 5th, electric capacity C11 respectively
The other end is grounded.
Differential amplifier circuit includes chip U4, and chip U4 uses difference amplifier AD620, the pins of chip U4 first and the 8th
Resistance R11 is provided between pin, the pins of chip U4 the 3rd are grounded by electric capacity C17, and the pins of chip U4 the 3rd meet chip U3
Three pins, chip U4 second pins are grounded by electric capacity C25, and chip U4 second pins connect the pins of chip U3 the 13rd, chip
The pins of U4 the 4th meet -5V voltages, electric capacity C20 one end, polar capacitor C21 negative poles, the electric capacity C20 other ends, polar capacitor C21 respectively
Positive pole and the pins of chip U4 the 5th are grounded, and the pins of chip U4 the 6th connect filter integration amplifying circuit, the pins of chip U4 the 7th
Polar capacitor C16 positive poles ,+5V voltages, electric capacity C15 one end are connect respectively, and polar capacitor C16 negative poles, the electric capacity C15 other ends connect
Ground.
Filter integration amplifying circuit includes chip U5, and chip U5 uses operational amplifier MAX4416, chip U5 second pins
Connecting resistance R14 one end, electric capacity C30 one end, resistance R14 one end connect electric capacity C27 one end, the pins of chip U5 first respectively respectively, electricity
Hold the C27 other ends and connect the electric capacity C30 other ends, resistance R15 one end, resistance R18 one end respectively, another terminating differentials of resistance R15 are put
Big circuit, resistance R18 other ends ground connection；The pins of chip U5 the 3rd are grounded；The pins of chip U5 the 8th connect+5V voltages, polarity respectively
Electric capacity C29 positive poles, electric capacity C28 one end, polar capacitor C29 negative poles, the electric capacity C28 other ends are grounded；The pins point of chip U5 the 4th
- 5V voltages, electric capacity C32 one end, polar capacitor C33 negative poles are not connect, and the electric capacity C32 other ends, polar capacitor C33 positive poles are grounded；
The pins of chip U5 first connect the pin of control chip the 27th and and comparator circuit input respectively.
Comparator circuit includes chip U6, and chip U6 uses high-frequency amplifier MAX987, second pin difference connecting resistance R19
One end, electric capacity C34 one end, resistance R17 one end, the resistance R19 other ends, the electric capacity C34 other ends are grounded, the resistance R17 other ends
Connect the pins of chip U5 first；The pins of chip U6 the 3rd difference connecting resistance R16 one end, resistance R13 one end, another terminations of resistance R16
The pins of chip U5 first, the resistance R13 other ends connect the pin of control chip the 31st, the pins of chip U6 the 6th respectively；Chip U6
4th pin is grounded；The pins of chip U6 the 6th connect voltage-regulator diode D2 negative poles, the pin of control chip the 82nd, polarity electricity respectively
Hold C35 positive poles, voltage-regulator diode D2 positive poles, polar capacitor C35 negative poles are grounded；The pins of chip U6 the 7th connect respectively+5V voltages,
Polar capacitor C31 positive poles, polar capacitor C31 negative poles ground connection.
Entirely the signal acquisition process of circuit is：Fan outlet appropriate position install resistance strain gage R3, due to
Promoted by fan blade wind-force, cause the change in resistance of resistance strain gage, the resistance is by R1, R3, R4 composition constant pressure bleeder circuit
Become voltage signal, be amplified by difference variable connector CD4052 into instrument difference amplifier AD620；To eliminate blast
Shake, then by MAX4416 cores form filter integration amplify, form smooth exchange curve, the exchange curve is divided into
Two-way：High-speed sampling is carried out by the port of A/D AD0 inside STM32F all the way；Another way, which enters, high-frequency amplifier
The dynamic comparer of MAX987 compositions produces square-wave pulse, and the frequency of the pulse can have by STM32F external interrupt INT and its
Internal timing, which combines, to be obtained, and the TO ports pulsewidth capture function that the pulsewidth of pulse can have STM32F obtains.
The design of key component or choosing principles are in circuit：
The blast curve of resistance strain gage is change, so the comparator of definite value can not be used, to realize the function,
Comparator circuit uses dynamic comparer, and the dynamic comparer principle is to convert cut off value as extreme value using C34, that is, works as signal
Ascent stage input signal is positive signal always, is negative signal when signal is in decline stage input signal, is formed with signal wave
Dynamic square-wave pulse.In order to eliminate shake, it is necessary to which C35 is held in pulse output end power-up again, it is ensured that the authenticity of square wave.
A/D sample rates inside STM32F407 digital signal controllers reach 2.4MHZ, and the rotating speed highest of blower fan is general
3000 revs/min, frequency 50HZ, it is 20ms that circling, which needs the time, if the blower fan band is compared with multiple fan blade 30, each fan blade
Region by the time of a pressure spot be 667us, 2.4MHZ A/D is sampled, then can sample 278 points, remove A/D's
Start the shut-in time, can also sample individual point more than 200, can accurately describe the image of this wave band completely.
Being interrupted using external interrupt INT and internal timing can be easy to try to achieve the frequency f of each fan blade, by f divided by fan blade
Number is exactly the rotating speed of blower fan.
TO pins are to obtain pulse width -- air quantity is from minimum to the time of maximum.
The general resistance strain gage response time is 107s, and the semiconductor-type foil gauge response time reaches 1011s, so resistance should
Become the requirement that piece meets blower fan frequency.
It should be pointed out that embodiment described above can make those skilled in the art that this practicality be more fully understood
New concrete structure, but do not limit the utility model in any way and create.Therefore, although specification and drawings and examples
The utility model is created and has been carried out being described in detail, it will be understood by those skilled in the art, however, that still can be to this reality
Modified with new creation or equivalent substitution；And the technical side of all spirit and scope for not departing from the utility model creation
Case and its improvement, it is encompassed by the utility model and created among the protection domain of patent.
Claims (9)
- A kind of 1. blower fan dynamic performance parameter measuring system, it is characterised in that including be arranged on blower fan resistance strain gage R3, Set reference resistance foil gauge R8 on circuit boards, multi-way switch circuit, differential amplifier circuit, filter integration amplifying circuit, Comparator circuit, reference voltage circuit and controller, described controller include control chip and its peripheral circuit, resistance-strain Piece R3 and reference resistance foil gauge R8 electrically connects variable connector by a difference channel respectively, and variable connector is by control chip control System, and filter integration amplifying circuit is connected by differential amplifier circuit, filter integration amplification circuit output end connects control respectively The A/D ports of chip and comparator circuit input, comparator circuit output end connect control chip pulsewidth and obtain end respectively Mouth and external interrupt port, reference voltage circuit provide stable reference voltage for whole system.
- A kind of 2. blower fan dynamic performance parameter measuring system according to claim 1, it is characterised in that the control chip Using STM32F047 digital signal controllers.
- A kind of 3. blower fan dynamic performance parameter measuring system according to claim 2, it is characterised in that described benchmark electricity Volt circuit includes chip U2, and chip U2 uses ref3012 chips, the pins of voltage chips U2 first ground connection, and the of voltage chips U2 Two pins connect+5V DC voltages, and connect polar capacitor C8 positive poles and electric capacity C9 one end respectively, polar capacitor C8 negative poles and The electric capacity C9 other ends are grounded, and the pins of voltage chips U2 the 3rd connect catching diode D1 one end, polar capacitor C1 positive poles, electricity respectively Hold C2 one end, the catching diode D1 other ends, polar capacitor C1 negative poles, the electric capacity C2 other ends are grounded.
- 4. a kind of blower fan dynamic performance parameter measuring system according to claim 2, it is characterised in that described multichannel is opened Powered-down road includes chip U3, and chip U3 uses CD4052 chips, and the pins of chip U3 the 6th and the 8th pin are grounded, chip U3 16 pins connect+5V DC voltages, and the pins of chip U3 the 3rd and the 13rd pin connect differential amplifier circuit, the pins of chip U3 the 7th Connect -5V voltages and connect polar capacitor C22 negative poles, electric capacity C23 one end respectively, polar capacitor C22 positive poles, the electric capacity C23 other ends are equal Ground connection.
- A kind of 5. blower fan dynamic performance parameter measuring system according to claim 4, it is characterised in that the resistance-strain Difference channel between piece R3 and variable connector is the first difference channel, and the first described difference channel includes resistance R1, resistance R1 mono- terminates reference voltage output end, and the resistance R1 other ends connect electric capacity C3 one end, electric capacity C5 one end, resistance R2 one end, electricity respectively Hinder foil gauge R3 one end, electric capacity C3 other ends ground connection, the electric capacity C5 other ends difference connecting resistance foil gauge R3 other ends, electric capacity C6 mono- End, resistance R4 one end, resistance R5 one end, the electric capacity C6 other ends, the resistance R4 other ends are grounded, and the resistance R5 other ends connect electricity respectively Hold C7 one end and the pins of chip U3 the 12nd, electric capacity C7 other ends ground connection, the resistance R2 other ends connect electric capacity C4 one end and core respectively The pins of piece U3 first, electric capacity C4 other ends ground connection.
- A kind of 6. blower fan dynamic performance parameter measuring system according to claim 4, it is characterised in that the reference resistance Difference channel between foil gauge R8 and variable connector is the second difference channel, and the second described difference channel includes resistance R6, Resistance R6 mono- terminates reference voltage output end, and the resistance R6 other ends meet electric capacity C12 one end, electric capacity C10 one end, resistance R7 mono- respectively End, reference resistance foil gauge R8 one end, electric capacity C10 other ends ground connection, the electric capacity C12 other ends meet reference resistance foil gauge R8 respectively The other end, electric capacity C13 one end, resistance R9 one end, resistance R10 one end, the electric capacity C13 other ends, the resistance R9 other ends are grounded, electricity The resistance R10 other ends connect electric capacity C14 one end and the pins of chip U3 the 14th, electric capacity C14 other ends ground connection, the resistance R7 other ends respectively Electric capacity C11 one end and the pins of chip U3 the 5th, electric capacity C11 other ends ground connection are connect respectively.
- 7. a kind of blower fan dynamic performance parameter measuring system according to claim 6, it is characterised in that described difference is put Big circuit includes chip U4, and chip U4 uses difference amplifier AD620, and electricity is provided between the pins of chip U4 first and the 8th pin R11 is hindered, the pins of chip U4 the 3rd are grounded by electric capacity C17, and the pins of chip U4 the 3rd connect the pins of chip U3 the 3rd, chip U4 the Two pins are grounded by electric capacity C25, and chip U4 second pins connect the pins of chip U3 the 13rd, the pins of chip U4 the 4th difference Meet -5V voltages, electric capacity C20 one end, polar capacitor C21 negative poles, the electric capacity C20 other ends, polar capacitor C21 positive poles and chip U4 5th pin is grounded, and the pins of chip U4 the 6th connect filter integration amplifying circuit, and the pins of chip U4 the 7th connect polar capacitor respectively C16 positive poles ,+5V voltages, electric capacity C15 one end, polar capacitor C16 negative poles, the electric capacity C15 other ends are grounded.
- A kind of 8. blower fan dynamic performance parameter measuring system according to claim 7, it is characterised in that described filtering product Amplifying circuit is divided to include chip U5, chip U5 uses operational amplifier MAX4416, chip U5 second pins difference connecting resistance R14 One end, electric capacity C30 one end, resistance R14 one end connect electric capacity C27 one end, the pins of chip U5 first, the electric capacity C27 other ends point respectively The electric capacity C30 other ends, resistance R15 one end, resistance R18 one end, another termination differential amplifier circuits of resistance R15, resistance R18 are not met The other end is grounded；The pins of chip U5 the 3rd are grounded；The pins of chip U5 the 8th connect+5V voltages, polar capacitor C29 positive poles, electricity respectively Hold C28 one end, polar capacitor C29 negative poles, the electric capacity C28 other ends are grounded；The pins of chip U5 the 4th connect -5V voltages, electricity respectively Hold C32 one end, polar capacitor C33 negative poles, the electric capacity C32 other ends, polar capacitor C33 positive poles are grounded；The pins of chip U5 first The pin of control chip the 27th and and comparator circuit input are connect respectively.
- A kind of 9. blower fan dynamic performance parameter measuring system according to claim 8, it is characterised in that described comparator Circuit includes chip U6, and chip U6 uses high-frequency amplifier MAX987, second pin difference connecting resistance R19 one end, electric capacity C34 mono- End, resistance R17 one end, the resistance R19 other ends, the electric capacity C34 other ends are grounded, and another chip termination U5 first of resistance R17 draw Pin；The pins of chip U6 the 3rd difference connecting resistance R16 one end, resistance R13 one end, another pins of chip termination U5 first of resistance R16, The resistance R13 other ends connect the pin of control chip the 31st, the pins of chip U6 the 6th respectively；The pins of chip U6 the 4th are grounded；Core The pins of piece U6 the 6th connect voltage-regulator diode D2 negative poles, the pin of control chip the 82nd, polar capacitor C35 positive poles, voltage stabilizing respectively Diode D2 positive poles, polar capacitor C35 negative poles are grounded；The pins of chip U6 the 7th are meeting+5V voltages, polar capacitor C31 just respectively Pole, polar capacitor C31 negative poles ground connection.
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| CN201720616703.6U CN206989992U (en) | 2017-05-27 | 2017-05-27 | A kind of blower fan dynamic performance parameter measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014444A (en) * | 2017-05-27 | 2017-08-04 | 山东罗泰风机有限公司 | A kind of blower fan dynamic performance parameter measuring system |
| CN114623975A (en) * | 2022-03-16 | 2022-06-14 | 秦皇岛博赫科技开发有限公司 | Electrically-driven high-precision automatic-zeroing pointer pressure gauge |
-
2017
- 2017-05-27 CN CN201720616703.6U patent/CN206989992U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014444A (en) * | 2017-05-27 | 2017-08-04 | 山东罗泰风机有限公司 | A kind of blower fan dynamic performance parameter measuring system |
| CN107014444B (en) * | 2017-05-27 | 2023-08-29 | 山东罗泰风机有限公司 | Fan dynamic performance parameter measurement system |
| CN114623975A (en) * | 2022-03-16 | 2022-06-14 | 秦皇岛博赫科技开发有限公司 | Electrically-driven high-precision automatic-zeroing pointer pressure gauge |
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