CN209639877U - A kind of wind pressure sensor - Google Patents
A kind of wind pressure sensor Download PDFInfo
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- CN209639877U CN209639877U CN201920535998.3U CN201920535998U CN209639877U CN 209639877 U CN209639877 U CN 209639877U CN 201920535998 U CN201920535998 U CN 201920535998U CN 209639877 U CN209639877 U CN 209639877U
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Abstract
The utility model relates to a kind of wind pressure sensor, including shell, fixing seat, pressure membrane and control panel, control panel is mounted on the outside of the shell by fixing seat；The shell is equipped with air cavity, positive-pressure detection port and negative-pressure detection port, the positive-pressure detection port and negative-pressure detection port are connected to the air cavity respectively, one end of the shell offers the first through hole being connected to air cavity, the one side of the periphery palette of the periphery of the pressure membrane and the first through hole, the pressure membrane is equipped with convex block；The control panel is equipped with infrared distance measurement circuit, and the infrared distance measurement circuit is equipped with the infrared ray transmitting terminal being oppositely arranged with the convex block and infrared receiver end；It can accurate discharge pressure of fan size, and effectively improve the precision of signal detection, reduce the failure rate of signal detection.
Description
Technical field
The utility model relates to sensor technical fields, more particularly to a kind of wind pressure sensor.
Background technique
It is opened currently, being both needed to use wind pressure on the household appliances such as smoke exhaust ventilator, gas heater, burnt gas wall hanging furnace on the market
It closes, whether the wind pressure for detecting exhaust apparatus is in normal range (NR), to ensure the normal of equipment working state.But it is existing
Blast switch makes the pressure membrane deformation of blast switch by gas pressure intensity, pushes microswitch movement to realize the on-off inspection of signal
It surveys, accurate wind pressure sizes values cannot be exported, the revolving speed of blower is caused not adjust accurately, and microswitch belongs to machinery and opens
It closes, since there are rigging errors for mechanical structure, causes measurement accuracy low, high failure rate.
Utility model content
The technical issues of the utility model is solved is to provide for wind pressure sensor, can accurate discharge pressure of fan size, and
The precision for effectively improving signal detection reduces the failure rate of signal detection.
Above-mentioned technical problem is solved by the following technical programs:
A kind of wind pressure sensor, including shell, fixing seat, pressure membrane and control panel, control panel are installed solid by fixing seat
Due to one end of the shell；
The shell is equipped with air cavity, positive-pressure detection port and negative-pressure detection port, the positive-pressure detection port and negative-pressure detection port point
Be not connected to the air cavity, one end of the shell offers the first through hole being connected to air cavity, the periphery of the pressure membrane with
The one side of the periphery palette of the first through hole, the pressure membrane is equipped with convex block；The control panel is equipped with infrared distance measurement electricity
Road, the infrared distance measurement circuit are equipped with the infrared ray transmitting terminal being oppositely arranged with the convex block and infrared receiver end.
Wind pressure sensor described in the utility model, it is generated compared with the background art the utility model has the advantages that air cavity is by just
Detection mouth and negative-pressure detection port and air communication to be measured are pressed, the infrared ray transmitting terminal transmitting that control panel controls infrared distance measurement circuit is red
Outside line, when the pressure membrane of wind pressure sensor is under pressure, deformation occurs for pressure membrane, distance between infrared ray transmitting terminal and convex block
It changes, because distance is different between infrared ray transmitting terminal and convex block, the intensity of infrared reflection is also different, infrared receiver end
The reflected infrared ray of convex block is received, the signal of relevant voltage is controlled to control panel according to the output of the intensity of receiving infrared-ray
The voltage signal of simulation is converted into digital signal output by making sheet, can obtain surveyed wind pressure information, this kind of wind pressure sensor
Pressure measuring service be not necessarily to mechanical structure microswitch, by using infrared distance measurement cordless detection convex block position
Shifting amount obtains surveyed wind pressure information, effectively increases signal detection precision, reduces the failure rate of signal detection.
The infrared distance measurement circuit includes infrared transmitting circuit and infrared receiving circuit, institute in one of the embodiments,
State infrared transmitting circuit include the first VCC power input, current-limiting resistance, zener diode and infrared transmitting tube, described first
VCC power input, current-limiting resistance and zener diode are sequentially connected electrically, one end of the infrared transmitting tube and current-limiting resistance
Output end electrical connection, other end ground connection；
The infrared receiving circuit includes that the 2nd VCC power input, infrared receiving tube, pull down resistor and the first signal are defeated
Outlet, the 2nd VCC power input, the infrared receiving tube and pull down resistor are sequentially connected electrically, and first signal is defeated
Outlet is grounded by pull down resistor；
The infrared transmitting tube and infrared receiving tube are oppositely arranged with the convex block respectively.
The wind pressure sensor further includes adjusting component in one of the embodiments, and the adjusting component includes adjusting
Plate, adjustment spring, adjusting screw and seal cap, the shell other end offer the second through-hole being connected to air cavity；
The adjustable plate is set in the air cavity, and one side is equipped with and adjusts plush copper, the adjusting plush copper and the pressure membrane
It contacts against；The another side that the second through-hole and the adjustable plate are protruded into described adjustment spring one end contacts against, the other end and institute
It states adjusting screw to contact against, the adjusting screw is set in the second through-hole and cooperates with the inner thread of the shell to adjust
The stroke of adjustment spring；The sealed cap is set to the second through-hole and is mounted on the outside of the shell.
It in one of the embodiments, further include the wind pressure for acquiring the gas cavity temperature and discharge pressure of fan calibration value
Circuit is calibrated, the wind pressure calibration circuit and the control panel are electrically connected.
The wind pressure sensor further includes adopting for acquiring the temperature of the gas cavity temperature in one of the embodiments,
Sample circuit and single-chip microcontroller, the temperature sampling circuit are set in the air cavity and by the single-chip microcontrollers and control panel electrical property
Connection.
The temperature sampling circuit includes the 3rd VCC power input, sampling resistor, heat in one of the embodiments,
Quick resistance, protective resistance, filter capacitor and second signal output end, one end of the sampling resistor and the 3rd VCC power supply
Input terminal electrical connection, described protective resistance one end are electrically connected with the other end of the sampling resistor, the other end and second letter
The electrical connection of number output end；Described thermistor one end is electrically connected with the other end of the sampling resistor, other end ground connection；The filter
Wave capacitor one end is electrically connected with the second signal output end, other end ground connection.
The wind pressure sensor further includes reset spring in one of the embodiments, described reset spring one end and institute
It states pressure membrane to contact against, the other end is fixed in the fixing seat.
The a length of 850-1000nm of infrared wave of the infrared ray transmitting terminal transmitting in one of the embodiments,.
Measurement between the infrared ray transmitting terminal and infrared receiver end and the convex block in one of the embodiments,
Distance is 1mm-5mm.
The outer surface of the convex block is coated with white coating in one of the embodiments,.
The output that the control panel is equipped with achievable serial ports, IIC and square wave communication mode in one of the embodiments, connects
Mouthful.
Detailed description of the invention
Fig. 1 is wind pressure sensor explosive view described in the utility model embodiment；
Fig. 2 is the side profile structure chart of wind pressure sensor described in the utility model embodiment；
Fig. 3 is the circuit diagram of infrared distance measurement circuit described in the utility model embodiment；
Fig. 4 is the circuit diagram of temperature sampling circuit described in the utility model embodiment.
Appended drawing reference:
1, shell；10, air cavity；11, positive-pressure detection port；12, negative-pressure detection port；13, first through hole；14, the second through-hole；
2, fixing seat；3, pressure membrane；30, convex block；4, control panel；5, infrared distance measurement circuit；50, infrared transmitting circuit；501, the first VCC
Power input；502, current-limiting resistance；503, zener diode；504, infrared transmitting tube；51, infrared receiving circuit；510,
Two VCC power inputs；511, infrared receiving tube；512, pull down resistor；513, the first signal output end；6, component is adjusted；
60, adjustable plate；600, plush copper is adjusted；61, adjustment spring；62, screw is adjusted；63, seal cap；7, temperature sampling circuit；70,
Three VCC power inputs；71, sampling resistor；72, thermistor；73, protective resistance；74, filter capacitor；75, second signal is defeated
Outlet；8, reset spring.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant
Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field
Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs
The limitation for the specific embodiment opened.
In the description of the present invention, it should be understood that term " first ", " second " " third " are only used for description mesh
, it is not understood to indicate or imply relative importance or implicitly indicates the quantity of indicated technical characteristic.It limits as a result,
Surely having the feature of " first ", " second ", " third " can explicitly or implicitly include at least one of the features.It is practical new at this
In the description of type, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.
In the description of the present invention, it should be understood that when an element is considered as " connection " another element,
It can be directly to another element or may be simultaneously present intermediary element.On the contrary, when element be referred to as " direct " and
When another element connects, intermediary element is not present.
A kind of wind pressure sensor referring to FIG. 1-2, including shell 1, fixing seat 2, pressure membrane 3 and control panel 4, control panel 4
One end of the shell 1 is mounted on by fixing seat 2；
The shell 1 is equipped with air cavity 10, positive-pressure detection port 11 and negative-pressure detection port 12, the positive-pressure detection port 11 and negative pressure
Detection mouth 12 is connected to the air cavity 10 respectively, and one end of the shell 1 offers the first through hole 13 being connected to air cavity 10, institute
The periphery of pressure membrane 3 and the periphery palette of the first through hole 13 are stated, the one side of the pressure membrane is equipped with convex block 30；It is described
Control panel 4 is equipped with infrared distance measurement circuit 5, and the infrared distance measurement circuit 5 is equipped with the infrared ray being oppositely arranged with the convex block 30 and sends out
Penetrate end (not shown) and infrared receiver end (not shown).
Above-mentioned wind pressure sensor, air cavity pass through positive-pressure detection port 11 and negative-pressure detection port 12 and air communication to be measured, control
The infrared ray transmitting terminal that making sheet 4 controls infrared distance measurement circuit 5 emits infrared ray, when the pressure membrane 3 of wind pressure sensor is under pressure
When, deformation occurs for pressure membrane 3, and distance changes between infrared ray transmitting terminal and convex block 30, because of infrared ray transmitting terminal and convex block
Distance is different between 30, and the intensity of infrared reflection is also different, and infrared receiver end receives reflected infrared by convex block 30
Line, according to the output of the intensity of receiving infrared-ray to the signal of relevant voltage to control panel 4, control panel 4 is by the voltage signal of simulation
It is converted into digital signal output, surveyed wind pressure information can be obtained, the pressure measuring service of this kind of wind pressure sensor is not necessarily to machine
The microswitch of tool structure obtains surveyed wind pressure by using the displacement of the cordless detection convex block 30 of infrared distance measurement
Information effectively increases signal detection precision, reduces the failure rate of signal detection.
Further, as shown in figure 3, in the present embodiment, the infrared distance measurement circuit 5 includes 50 He of infrared transmitting circuit
Infrared receiving circuit 51, the infrared transmitting circuit 50 include the first VCC power input 501, current-limiting resistance 502, pressure stabilizing two
Pole pipe 503 and infrared transmitting tube 504, the first VCC power input 501, current-limiting resistance 502 and zener diode 503 according to
One end of secondary electrical connection, the infrared transmitting tube 504 is electrically connected with the output end of current-limiting resistance 502, other end ground connection；
Power supply is inputted from the first VCC power input 501, steady through 502 current limliting of current-limiting resistance and zener diode 503
2V voltage is exported after pressure to power for infrared transmitting tube 504,
The infrared receiving circuit 51 includes the 2nd VCC power input 510, infrared receiving tube 511, pull down resistor 512
With the first signal output end 513, the 2nd VCC power input 510, the infrared receiving tube 511 and pull down resistor 512 according to
Secondary electrical connection, first signal output end 513 are grounded by pull down resistor 512；Power supply is from the 2nd VCC power input 510
Input is powered for infrared receiving tube 511, and infrared receiving tube 511 receives the infrared ray fired back by convex block 30 and exports electric current
The current signal is converted into voltage signal by pull down resistor 512 and is exported extremely by the first signal output end 513 by signal
Control panel 4 executes the conversion of the voltage signal by control panel 4 and exports corresponding wind pressure information.
Further, the wind pressure sensor further includes adjusting component 6, and the adjusting component 6 includes adjustable plate 60, adjusts
Section spring 61, adjusting screw 62 and seal cap 63,1 other end of shell offer the second through-hole 14 being connected to air cavity 10；
The adjustable plate 60 is set in the air cavity 10, and one side is equipped with and adjusts plush copper 600, the adjustings plush copper 600 and
The pressure membrane 3 contacts against；The another side that the second through-hole 14 and the adjustable plate 60 are protruded into described 61 one end of adjustment spring connects
Touching against, the other end is contacted against with the adjustings screw 62, the adjusting screw 61 it is interior set on the second through-hole 14 and with it is described
The inner thread of shell 1 cooperates to adjust the stroke of adjustment spring 61；The seal cap 63 is covered on the second through-hole 14 and pacifies
The outside that dress is fixed on the shell 1 avoids pressure release；The benefit designed in this way is, pressure membrane 3 during repeated deformation,
Tensile force can change, and adjust the tensile force of the adjusting pressure membrane 3 of component 6 by setting to correct the wind pressure value of output, into one
Step improves the detection accuracy of wind pressure signal.
Further, as shown in figure 4, the wind pressure sensor further includes adopting for acquiring the temperature of the gas cavity temperature
Sample circuit 7 and single-chip microcontroller (not shown), the temperature sampling circuit 7 are set in the air cavity 10 and pass through the single-chip microcontroller
It is electrically connected with the control panel 4, the reason of such setting is that pressure membrane 3 is silica gel material, in identical test pressure and not
Same test environment temperature, hardness can change, therefore the deformation quantity of pressure membrane 3 has difference, leads to wind pressure sensor
Discharge pressure of fan value is of different sizes, it is therefore desirable to be modified to discharge pressure of fan size, wind pressure amendment needs a large amount of sample to carry out
Test, and conclusion integration is carried out to measurement result under the conditions of multiple temperature；Specifically, the first step takes 100 test specimens
Product carry out output calibration, in constant temperature and humidity experimental box (25 DEG C of temperature, humidity 60%), are passed through to the pressure tap of wind pressure sensor
Constant low pressure (such as 50Pa) adjusts screw 52 by adjusting wind pressure sensor, infrared receiving tube is made to export identical voltage value；
Second step, measurement are averaged, and are measurement interval (assuming that the measurement range of wind pressure sensor is 0-100Pa), record 0 with 5Pa
20*85=1900 group number can be obtained altogether in the output valve of every rising once infrared receiving tube, each sensor within the scope of DEG C -85 DEG C
According to then by the output valve summation of the lower 100 wind pressure sensor infrared receiving tubes of same test wind pressure and identical test temperature
It is averaged afterwards divided by 100；The output table of infrared receiving tube when different test temperatures and different test wind pressure has finally just been obtained,
By the output table, wind pressure value, the functional relation in air cavity 10 between temperature and infrared receiving tube output valve three are found out, as long as
The output valve for obtaining the temperature and infrared receiving tube in air cavity 10, just acquires wind pressure at this time.
Further, the temperature sampling circuit 7 includes the 3rd VCC power input 70, sampling resistor 71, thermistor
72, protective resistance 73, filter capacitor 74 and second signal output end 75, one end of the sampling resistor 71 and the 3rd VCC
Power input 70 is electrically connected, and described 73 one end of protective resistance is electrically connected with the other end of the sampling resistor 71, the other end and
The second signal output end 75 is electrically connected；Described 72 one end of thermistor is electrically connected with the other end of the sampling resistor 71,
Other end ground connection；Described 74 one end of filter capacitor is electrically connected with the second signal output end 75, other end ground connection.
Further, the wind pressure sensor further includes reset spring 8, described 8 one end of reset spring and the pressure membrane 3
It contacts against, the other end is fixed in the fixing seat 2, and by the way that reset spring 8 is arranged, when pressure disappears, convex block 30 can be returned rapidly
Original position is arrived again, improves the sensitivity of wind pressure sensor, avoids causing measurement error to wind pressure measurement next time.
Further, a length of 850-1000nm of infrared wave of the infrared ray transmitting terminal transmitting, it is preferable that infrared ray hair
When penetrating a length of 940nm of infrared wave of end transmitting, the sensitivity highest at infrared receiver end.
Further, the measurement distance between the infrared ray transmitting terminal and infrared receiver end and convex block 30 is 1mm-
5mm reduces the volume of wind pressure sensor while the measurement distance range ensures wind pressure measurement precision, reduces wind pressure biography
Requirement of the sensor to installation environment.
Further, the outer surface of the convex block 30 is coated with white coating, and the benefit being arranged in this way is enhancing convex block 30
The albedo of outer surface promotes the reception of infrared receiving tube.
Further, the control panel 4 is equipped with the output interface that serial ports, IIC and square wave communication mode can be achieved, the design
Benefit be to improve the compatibility of this kind of wind pressure sensor, to improve this kind of wind pressure sensor ease of use, need
Illustrate, control panel 4 is equipped with the output interface for not limiting to three of the above communication mode, can also be equipped with SPI communication, monobus
The output interface of one of communication, I/O port communication or communication.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of wind pressure sensor, it is characterised in that: including shell, fixing seat, pressure membrane and control panel, control panel passes through fixation
Seat is mounted on the outside of the shell；
The shell is equipped with air cavity, positive-pressure detection port and negative-pressure detection port, the positive-pressure detection port and negative-pressure detection port respectively with
Air cavity connection, one end of the shell offer the first through hole being connected to air cavity, the periphery of the pressure membrane with it is described
The one side of the periphery palette of first through hole, the pressure membrane is equipped with convex block；The control panel is equipped with infrared distance measurement circuit, institute
It states infrared distance measurement circuit and is equipped with the infrared ray transmitting terminal being oppositely arranged with the convex block and infrared receiver end.
2. wind pressure sensor as described in claim 1, it is characterised in that: the infrared distance measurement circuit includes infrared transmitting circuit
And infrared receiving circuit, the infrared transmitting circuit include the first VCC power input, current-limiting resistance, zener diode and red
Outer transmitting tube, the first VCC power input, current-limiting resistance and zener diode are sequentially connected electrically, the infrared transmitting tube
One end be electrically connected with the output end of current-limiting resistance, the other end ground connection；
The infrared receiving circuit includes the 2nd VCC power input, infrared receiving tube, pull down resistor and the output of the first signal
End, the 2nd VCC power input, the infrared receiving tube and pull down resistor are sequentially connected electrically, the first signal output
End is grounded by pull down resistor and is electrically connected with the signal receiving end of the control panel；
The infrared transmitting tube and infrared receiving tube are oppositely arranged with the convex block respectively.
3. wind pressure sensor as described in claim 1, it is characterised in that: the wind pressure sensor further includes adjusting component, institute
Stating and adjusting component includes adjustable plate, adjustment spring, adjusting screw and seal cap, and the shell other end is offered to be connected to air cavity
The second through-hole；
The adjustable plate is set in the air cavity, and one side is equipped with and adjusts plush copper, and the adjusting plush copper is contacted with the pressure membrane
Against；The another side that the second through-hole and the adjustable plate are protruded into described adjustment spring one end contacts against, the other end and the tune
Section screw contacts against, and the adjusting screw is set in the second through-hole and cooperates with the inner thread of the shell to adjust and adjust
The stroke of spring；The sealed cap is set to the second through-hole and is mounted on the outside of the shell.
4. wind pressure sensor as described in claim 1, it is characterised in that: the wind pressure sensor further includes described for acquiring
The temperature sampling circuit and single-chip microcontroller of gas cavity temperature, the temperature sampling circuit are set in the air cavity and pass through the monolithic
Machine and the control panel are electrically connected.
5. wind pressure sensor as claimed in claim 4, it is characterised in that: the temperature sampling circuit includes the 3rd VCC power supply
Input terminal, sampling resistor, thermistor, protective resistance, filter capacitor and second signal output end, one end of the sampling resistor
It is electrically connected with the 3rd VCC power input, described protective resistance one end is electrically connected with the other end of the sampling resistor, separately
One end is electrically connected with the second signal output end；Described thermistor one end is electrically connected with the other end of the sampling resistor,
Other end ground connection；Described filter capacitor one end is electrically connected with the second signal output end, other end ground connection.
6. wind pressure sensor as described in claim 1, it is characterised in that: the wind pressure sensor further includes reset spring, institute
It states reset spring one end to contact against with the pressure membrane, the other end is fixed in the fixing seat.
7. wind pressure sensor as claimed in any one of claims 1 to 6, it is characterised in that: the infrared ray transmitting terminal emits red
Outside line wavelength is 850-1000nm.
8. wind pressure sensor as claimed in any one of claims 1 to 6, it is characterised in that: the infrared ray transmitting terminal and infrared ray
Measurement distance between receiving end and the convex block is 1mm-5mm.
9. wind pressure sensor as claimed in any one of claims 1 to 6, it is characterised in that: the outer surface of the convex block is coated with white
Color coating.
10. wind pressure sensor as claimed in any one of claims 1 to 6, it is characterised in that: the control panel, which is equipped with, can be achieved string
The output interface of mouth, IIC and square wave communication mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535998.3U CN209639877U (en) | 2019-04-18 | 2019-04-18 | A kind of wind pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535998.3U CN209639877U (en) | 2019-04-18 | 2019-04-18 | A kind of wind pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209639877U true CN209639877U (en) | 2019-11-15 |
Family
ID=68497556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920535998.3U Active CN209639877U (en) | 2019-04-18 | 2019-04-18 | A kind of wind pressure sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN209639877U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017935A (en) * | 2019-04-18 | 2019-07-16 | 广东万和热能科技有限公司 | A kind of wind pressure sensor |
| CN113685861A (en) * | 2020-05-19 | 2021-11-23 | 青岛海尔智慧厨房电器有限公司 | Range hood's wind pressure detection device and range hood thereof |
-
2019
- 2019-04-18 CN CN201920535998.3U patent/CN209639877U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017935A (en) * | 2019-04-18 | 2019-07-16 | 广东万和热能科技有限公司 | A kind of wind pressure sensor |
| CN110017935B (en) * | 2019-04-18 | 2024-09-13 | 广东万和热能科技有限公司 | Wind pressure sensor |
| CN113685861A (en) * | 2020-05-19 | 2021-11-23 | 青岛海尔智慧厨房电器有限公司 | Range hood's wind pressure detection device and range hood thereof |
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