CN208887829U - A kind of wind-force wind pressure measuring meter - Google Patents
A kind of wind-force wind pressure measuring meter Download PDFInfo
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- CN208887829U CN208887829U CN201821398554.1U CN201821398554U CN208887829U CN 208887829 U CN208887829 U CN 208887829U CN 201821398554 U CN201821398554 U CN 201821398554U CN 208887829 U CN208887829 U CN 208887829U
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- wind pressure
- foil gauge
- measurement chip
- pressure measuring
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Abstract
The utility model discloses a kind of wind-force wind pressure measuring meters, described device is mounted on fan outlet, the device includes electric resistance wire strain gauge, measurement chip and the power module for electric resistance wire strain gauge and measurement chip power supply, the electric resistance wire strain gauge is made of return type elastomer and the foil gauge of at least one, the deformation quantity of return type elastomer can be converted to voltage signal and be transferred to measurement chip by the foil gauge, measurement chip handles the signal received, calculates the wind pressure value of air outlet.The utility model structure is simple, easy to use, greatly reduces the cost of electronic circuit, even if using in dust atmosphere, will not impact to its detection performance.
Description
Technical field
The utility model relates to the wind-force detections of the blowers such as air-conditioning, air purifier, fresh air system operating air outlet, especially
It is to be related to a kind of wind-force wind pressure measuring meter.
Background technique
It is in the prior art usually that air-conditioning, air purifier, fresh air system etc. are measured by measurement blower running speed
Blower operates the wind-force of air outlet, so judge the whether clean strainer of air inlet or blocking or blower whether aging, damage
It is bad.Wind pressure measurement module currently on the market is substantially all only using displacement sensor and pressure sensor.
Have the following deficiencies: one using the wind pressure measurement module of displacement sensor, according to be electromagnetic type displacement sensing
Device, electromagnetic type displacement sensor needs are powered with AC sine wave, and its output end is also required to setting current rectifying and wave filtering circuit,
Design is complicated；Two, according to be resistor type displacement sensor, the service life of resistor type displacement sensor is short, when cannot be long
Between use, use cost is high；Three, displacement sensor is all that the variable quantity of position is converted to electric signal to export；As long as having
Change in location accumulates dust in the meeting being used for a long time on lower sensor, to influence the accuracy of its detection；Four, sensor at
This is higher；Five, circuit design is at high cost.
Have the following deficiencies: that one, pressure sensor is generally divided into diffusion silicon using the wind pressure measurement module of pressure sensor
Pressure sensor and ceramic capacitive pressure sensors, both pressure sensors are more demanding to use environment, in dust atmosphere
The lower possibility that there is failure；Two, diffusion silicon pressure sensor is generally all made of semiconductor, small in size, and pressure sensing port is also small,
It is easy to be blocked by dust to make sensor failure；Three, ceramic capacitive pressure sensors and diffused-silicon pressure sensing are all benefits
Induction air pressure is removed with the film on sensor, once will be easy to influence the accuracy of measurement after having dust accumulation on film；Four,
Sensor high expensive；Five, circuit design is at high cost.
Summary of the invention
The purpose of the utility model is to overcome the deficiencies in the prior art, design a kind of wind-force wind pressure measuring meter.
In order to achieve the above objectives, the technical scheme adopted by the utility model is
A kind of wind-force wind pressure measuring meter, described device are mounted on fan outlet, the device include electric resistance wire strain gauge,
Chip and the power module for electric resistance wire strain gauge and measurement chip power supply are measured, the electric resistance wire strain gauge is by return type bullet
Property body and the foil gauge of at least one constitute, the return type elastomer is corresponding to generate under the action of air outlet wind pressure
Deformation is internally provided with two circular through holes being connected；The foil gauge is fixed on the upper surface of return type elastomer, to
The deformation quantity of return type elastomer is converted to the voltage signal linear with it, and the voltage signal is transferred to measurement
Chip；The measurement chip includes Differential Input analog-to-digital conversion module, MCU, storage unit, serial ports and PWM chip, the difference
Input analog-to-digital conversion module receives the voltage signal of foil gauge transmission and converts the signal into digital data transmission to MCU, MCU
The signal received is handled to obtain the wind pressure value of air outlet, by treated, wind pressure data is stored to storage unit MCU
While, receiving end is transmitted to by serial ports or after PWM chip impulse modulation.
Preferably, the measurement chip further includes digital analog converter, to obtain amendment voltage from the external world, and
Give the amendment voltage transmission to Differential Input analog-to-digital conversion module, the reference voltage new as Differential Input analog-to-digital conversion module.
Preferably, the serial ports includes RS485 interface, RS422 interface and RS232 interface.
Preferably, the foil gauge is one, which is the foil gauge with wheatstone bridge, or there are two tools
The foil gauge of the half-bridge circuit of strain resistor composition, or there are four the foil gauges of the full-bridge circuit of strain resistor composition for tool.
Preferably, the foil gauge at least two, between foil gauge by aerial lug constitute half-bridge circuit or
Full-bridge circuit.
Preferably, the return type elastomer is integrally machined using aluminum metal material.
The positive beneficial effect of the utility model:
1, the utility model structure is simple, easy to use, processes return type elastomer by using aluminum metal material,
Foil gauge is pasted on elastomer, so that the signal output end of foil gauge is connected with the signal input part for measuring chip, can be passed through strain
The wind pressure of air outlet is converted to voltage signal by piece, and the signal is transmitted in measurement chip, by the processing for measuring chip
Analysis, calculates the wind pressure value of air outlet, greatly reduces production cost and material cost.
2, the wind-force wind pressure measuring meter of the utility model is small in size, low manufacture cost, greatly reduces electronic circuit
Cost, and long service life, through experimental test, service life is at least up to 6 years, will not even if using in dust atmosphere
Its detection performance is impacted.
Detailed description of the invention
It, below will be to embodiment in order to become apparent to illustrate the utility model embodiment or technical solution in the prior art
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the schematic block circuit diagram of the utility model.
Fig. 3 is the functional block diagram that the utility model measures chip.
The meaning of figure label are as follows: 1 is foil gauge, and 2 be measurement chip, and 3 be force side, and 4 be circular through hole, and 5 be reply
Formula elastomer.
Specific embodiment
To make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings
Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality
With novel range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid unnecessarily mixing
Confuse the concept of the utility model.
It is only to be not intended to be limiting the disclosure merely for for the purpose of describing particular embodiments in the term that the disclosure uses.
The "an" of the singular used in disclosure and the accompanying claims book, " described " and "the" are also intended to including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps
It may be combined containing one or more associated any or all of project listed.
In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of utility model.
In subsequent description, using such as suffix of " module " or " unit " for indicating element only for advantageous
In the explanation of the utility model, there is no specific meanings for itself.Therefore, " module " can be used mixedly with " component ".
Illustrate present embodiment in conjunction with Fig. 1-Fig. 3, the wind-force wind pressure measuring meter of the utility model is mounted on air-conditioning, sky
The air outlet of the blowers such as gas purifier, fresh air system operating.The device includes electric resistance wire strain gauge, measurement chip 2 and is electric
The power module of resistive strain gauge and measurement chip power supply.
The electric resistance wire strain gauge is made of return type elastomer 5 and the foil gauge 1 of at least one.
The return type elastomer 5, to generate corresponding deformation, return type elastomer 5 under the action of air outlet wind pressure
It is the cube structure made of aluminum metal material is integrally machined, is internally provided with two circular through holes being connected 4.
The foil gauge 1 is fixed on the upper surface of return type elastomer 5, to turn the deformation quantity of return type elastomer 5
It is changed to the voltage signal linear with it, and the voltage signal is transferred to measurement chip.In the present embodiment, if foil gauge
1 when being set as one, which uses the foil gauge with wheatstone bridge, or there are two the half-bridge electricity of strain resistor composition for tool
The foil gauge on road, or there are four the foil gauges of the full-bridge circuit of strain resistor composition for tool；The foil gauge 1 is at least provided with two
It is a, half-bridge circuit or full-bridge circuit are constituted by aerial lug between these foil gauges.
The signal output end of electric resistance wire strain gauge 1 is connected with the signal input part of measurement chip 2, and the measurement setting of chip 2 exists
In one shell, the one end of the shell and the return type elastomer 5 of electric resistance wire strain gauge is mutually fixed, return type elastomer 5 it is another
One end is provided with the force side to experience wind-force, and in the present embodiment, which can be set to bowl-shape, the upper end level
Face is stress surface.When the wind of air outlet is applied on force side, return type elastomer 5 is deformed, to make to be attached to reply
The resistance value of the foil gauge 1 of formula elastomer upper end generates corresponding variation, and resistance change amount is converted to by its measuring circuit
Corresponding voltage signal, and the voltage signal is transferred to measurement chip 2.
The measurement chip 2 includes Differential Input analog-to-digital conversion module (ADC), MCU, storage unit (EEPROM), serial ports
(Interface) and PWM chip, the signal input part of the Differential Input analog-to-digital conversion module and the signal of electric resistance wire strain gauge
Output end be connected, signal output end be connected with the signal input part of MCU, the signal output end of MCU respectively with storage unit, serial ports
It is connected with PWM chip.The program set according to mechanics principle is stored in the MCU, it can be to the number received according to the program
Word signal is handled, to calculate wind pressure value.
After measurement chip 2 receives the voltage signal of foil gauge, internal specific data transmission procedure are as follows: difference is defeated
Enter analog-to-digital conversion module to receive the voltage signal of foil gauge transmission and convert the signal into digital signal, then believes the number
Number it is transferred to MCU, MCU handles the signal received, calculates the wind pressure value of air outlet, and MCU will treated wind pressure
While data storage is to storage unit, by serial ports (RS485 interface, RS422 interface or RS232 interface) by the digital signal
Being transferred to receiving end or MCU, wind pressure data is transferred to PWM chip by treated, and PWM chip carries out pulse tune to the signal
Then system exports the imitated output quantity of 4-20mA, 0-100mA.
The measurement chip 2 further includes digital analog converter (DAC), to obtain amendment voltage from the external world, and should
Amendment voltage transmission gives Differential Input analog-to-digital conversion module, the reference voltage new as Differential Input analog-to-digital conversion module.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand；Specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (6)
1. a kind of wind-force wind pressure measuring meter, which is characterized in that described device is mounted on fan outlet, which includes resistance
Formula strain gauge, measurement chip and the power module for electric resistance wire strain gauge and measurement chip power supply, the electric resistance wire strain gauge
It is made of return type elastomer and the foil gauge of at least one,
The return type elastomer is internally provided with two and is connected to generate corresponding deformation under the action of air outlet wind pressure
Logical circular through hole；
The foil gauge is fixed on the upper surface of return type elastomer, to by the deformation quantity of return type elastomer be converted to and its
Linear voltage signal, and the voltage signal is transferred to measurement chip；
The measurement chip includes Differential Input analog-to-digital conversion module, MCU, storage unit, serial ports and PWM chip, the difference
Input analog-to-digital conversion module receives the voltage signal of foil gauge transmission and converts the signal into digital data transmission to MCU, MCU
The signal received is handled to obtain the wind pressure value of air outlet, by treated, wind pressure data is stored to storage unit MCU
While, receiving end is transmitted to by serial ports or after PWM chip impulse modulation.
2. wind-force wind pressure measuring meter according to claim 1, which is characterized in that the measurement chip further includes digital mould
Quasi- converter to obtain amendment voltage from the external world, and gives the amendment voltage transmission to Differential Input analog-to-digital conversion module, as
The new reference voltage of Differential Input analog-to-digital conversion module.
3. wind-force wind pressure measuring meter according to claim 1, which is characterized in that the serial ports include RS485 interface,
RS422 interface and RS232 interface.
4. wind-force wind pressure measuring meter according to claim 1, which is characterized in that the foil gauge is one, the strain
Piece is the foil gauge with wheatstone bridge, or there are two the foil gauges of the half-bridge circuit of strain resistor composition for tool, or there are four tools
The foil gauge of the full-bridge circuit of strain resistor composition.
5. wind-force wind pressure measuring meter according to claim 1, which is characterized in that the foil gauge at least two is answered
Become between piece and half-bridge circuit or full-bridge circuit are constituted by aerial lug.
6. wind-force wind pressure measuring meter according to claim 1, which is characterized in that the return type elastomer uses aluminium gold
Belong to material to be integrally machined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821398554.1U CN208887829U (en) | 2018-08-29 | 2018-08-29 | A kind of wind-force wind pressure measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821398554.1U CN208887829U (en) | 2018-08-29 | 2018-08-29 | A kind of wind-force wind pressure measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208887829U true CN208887829U (en) | 2019-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821398554.1U Active CN208887829U (en) | 2018-08-29 | 2018-08-29 | A kind of wind-force wind pressure measuring meter |
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| CN (1) | CN208887829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141730A (en) * | 2018-08-29 | 2019-01-04 | 健芳电子科技(上海)有限公司 | A kind of wind-force wind pressure measuring meter |
-
2018
- 2018-08-29 CN CN201821398554.1U patent/CN208887829U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141730A (en) * | 2018-08-29 | 2019-01-04 | 健芳电子科技(上海)有限公司 | A kind of wind-force wind pressure measuring meter |
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