CN107741507A - A kind of NTC airspeedometers - Google Patents
A kind of NTC airspeedometers Download PDFInfo
- Publication number
- CN107741507A CN107741507A CN201711317746.5A CN201711317746A CN107741507A CN 107741507 A CN107741507 A CN 107741507A CN 201711317746 A CN201711317746 A CN 201711317746A CN 107741507 A CN107741507 A CN 107741507A
- Authority
- CN
- China
- Prior art keywords
- thermistor
- pillar
- fore shell
- airspeedometers
- ntc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
- G01P5/12—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables using variation of resistance of a heated conductor
Abstract
The invention discloses a kind of NTC airspeedometers, including upper lid, the lower surface of upper lid is provided with pillar, and pillar is fixedly connected with upper lid by screw, the bottom of pillar is provided with rear shell, the bottom of rear shell and pillar is brought into close contact, and the top of rear shell is provided with thermistor, and thermistor is fixedly mounted on the top of rear shell, the bottom of pillar is provided with fore shell, the bottom of fore shell and pillar is brought into close contact, and the inside of fore shell is provided with single-chip microcomputer, and single-chip microcomputer insertion is arranged on the inside of fore shell.The NTC airspeedometers mainly pass through one piece of lithium battery power supply, stable electric current is accommodated onto two groups of thermistors by thermosensitive resistor and circuit, allow thermistor heating power, then when the temperature of thermistor rises to a stationary value, the radiating on surface reaches a stable value with electric current by caused heat, when fluid takes away the temperature of thermistor surface, the airspeedometer for producing the corresponding relation between different voltage and wind speed to design is risen by its resistance.
Description
Technical field
The present invention relates to airspeedometer field, specially a kind of NTC airspeedometers.
Background technology
Air velocity（Abbreviation wind speed）Measurement be a kind of measurement of important parameter, in the lab, environment purification, industry
All it is used widely in the measurement of the multiple spot such as health, ventilating system, jet system, air-conditioning equipment air speed.
But existing airspeedometer, volume is typically bigger, and internal part is more, cost is high, and range is also big, is not suitable in wind speed
Small place use, and inconvenience is carried, it can be disturbed in the measurements by harmonic wave, deviation usually occur in data.
So how to design a kind of NTC airspeedometers, turning into us will currently solve the problems, such as.
The content of the invention
It is an object of the invention to provide a kind of NTC airspeedometers, to solve the airspeedometer proposed in above-mentioned background technology
Problem.
To achieve the above object, the present invention provides following technical scheme：A kind of NTC airspeedometers, including upper lid, the upper lid
Lower surface be provided with pillar, and the pillar is fixedly connected with upper lid by screw, and the bottom of the pillar is provided with rear shell, described
The bottom of rear shell and pillar is brought into close contact, and the top of the rear shell is provided with thermistor, and the thermistor is fixedly mounted on
The top of rear shell, the bottom of the pillar are provided with fore shell, and the bottom of the fore shell and pillar is brought into close contact, the inside of the fore shell
Provided with single-chip microcomputer, and single-chip microcomputer insertion is arranged on the inside of fore shell, and the right side of the single-chip microcomputer is provided with AD conversion interface, and
It is brought into close contact on the right side of the AD conversion interface and single-chip microcomputer, the right side of the AD conversion interface is provided with connecting wire, and described
Connecting wire is plugged on the right side of a/d converter and is fixedly connected, and the bottom of the single-chip microcomputer is provided with lithium battery, and the lithium battery
The bottom of single-chip microcomputer is fixedly mounted on, the front portion of the fore shell is provided with control button, and the front portion of the control button and fore shell
It is brought into close contact.
Further, the lower surface of the fore shell is provided with pole, and the lower surface of the pole and fore shell is consolidated by screw
Fixed connection.
Further, the inside of the rear shell is provided with thermosensitive resistor and circuit, and thermosensitive resistor and circuit insertion is arranged on
The inside of rear shell, and thermosensitive resistor and circuit is arranged on the back side of single-chip microcomputer.
Further, the top of the rear shell is provided with main thermistor, and the main thermistor is fixedly mounted on rear shell
Upper surface, and the left and right sides of main thermistor is provided with pillar.
Further, the top of the fore shell is provided with auxiliary thermistor, and the auxiliary thermistor is fixedly mounted on fore shell
Upper surface, and the left and right sides of auxiliary thermistor is provided with pillar.
Further, the bottom of the thermistor is provided with corresponding bridge arm, and the bottom of the corresponding bridge arm and thermistor
Portion is brought into close contact, and the other end of corresponding bridge arm is set by thermosensitive resistor and circuit.
Further, the thermosensitive resistor and circuit is anterior is provided with potentiometer, and the potentiometer and thermosensitive resistor and circuit
Front portion is brought into close contact.
Further, the front portion of the single-chip microcomputer is provided with T-shaped filter circuit, and the T-shaped filter circuit and single-chip microcomputer
Front portion is brought into close contact.
Further, the front portion of the fore shell is provided with wind speed display screen, and the wind speed display screen is fixedly mounted on fore shell
Front portion, and the left and right sides of wind speed display screen is provided with control button.
Compared with prior art, the beneficial effects of the invention are as follows：The NTC airspeedometers mainly by one piece of lithium battery power supply,
Electric current that will be stable by thermosensitive resistor and circuit is accommodated onto two groups of thermistors, allows thermistor heating power, then temperature-sensitive electricity
When the temperature of resistance rises to a stationary value, radiating and the electric current on surface reach a stable value by caused heat, when
When fluid takes away the temperature of thermistor surface, the corresponding relation produced between different voltage and wind speed is risen by its resistance
Come the airspeedometer designed, this kind is simple in construction come the airspeedometer designed using thermistor, except fixation and the protection of outside fill
Put outer, the measured value with regard to wind speed can be completed by the device to generate heat and with servicing unit, compared with other airspeedometers, this kind
The inner body of NTC airspeedometers is few, so cheap, small volume, range is also relatively small, more suitable for laboratory, purification
The comparatively gentle environment of the such air flow in room, small wind speed is measured, and the inside of this kind of airspeedometer is provided with monolithic
Machine, can be to its input signal, and in order to reduce error, the inside of this kind of airspeedometer has installed a T-shaped filter circuit, Ke Yi additional
The quality of the interference promotion signal of harmonic carcellation when airspeedometer works.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the shell main view profile of the present invention；
Fig. 3 is the thermosensitive resistor and circuit figure of the present invention.
Fig. 4 is the T-shaped filter circuit figure of the present invention.
In figure：1st, upper lid, 101, pillar, 102, fore shell, 103, rear shell, 104, pole, 2, thermosensitive resistor and circuit, 201, heat
Quick resistance, 2011, main thermistor, 2012, auxiliary thermistor, 2013 corresponding bridge arms, 202, potentiometer, 3, single-chip microcomputer, 301, T
Type filter circuit, 302, AD conversion interface, 3021, connecting wire, 4, lithium battery, 5, wind speed display screen, 501, control button.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-4 are referred to, the present invention provides a kind of technical scheme：A kind of NTC airspeedometers, including upper lid 1, under upper lid 1
Surface is provided with pillar 101, and pillar 101 is fixedly connected with upper lid 1 by screw, and the bottom of pillar 101 is provided with rear shell 103, after
The bottom of shell 103 and pillar 101 is brought into close contact, and the top of rear shell 103 is provided with thermistor 201, and thermistor 201 fixes peace
Mounted in the top of rear shell 103, the bottom of pillar 101 is provided with fore shell 102, and the bottom of fore shell 102 and pillar 101 is brought into close contact, preceding
The inside of shell 102 is provided with single-chip microcomputer 3, and single-chip microcomputer 3 is embedded in the inside for being arranged on fore shell 102, and the right side of single-chip microcomputer 3 turns provided with AD
Alias 302, and the right side of AD conversion interface 302 and single-chip microcomputer 3 is brought into close contact, the right side of AD conversion interface 302 is provided with connection
Wire 3021, and connecting wire 3021 is plugged on the right side of a/d converter 302 and is fixedly connected, the bottom of single-chip microcomputer 3 is provided with lithium electricity
Pond 4, and lithium battery 4 is fixedly mounted on the bottom of single-chip microcomputer 3, the front portion of fore shell 102 is provided with control button 501, and control button
501 are brought into close contact with the front portion of fore shell 102.
Further, the lower surface of fore shell 102 is provided with pole 104, and pole 104 and the lower surface of fore shell 102 pass through spiral shell
Nail is fixedly connected, and by pole 104, can support the critical piece of NTC airspeedometers, thermistor 201 can be contacted
To more wind, the accuracy of measured value is improved.
Further, the inside of rear shell 103 is provided with thermosensitive resistor and circuit 2, and the insertion of thermosensitive resistor and circuit 2 is arranged on rear shell
103 inside, and thermosensitive resistor and circuit 2 is arranged on the back side of single-chip microcomputer 3, by thermosensitive resistor and circuit 2, can give thermistor
201 1 stable electric currents, heat thermistor 201, and temperature rises.
Further, after the top of rear shell 103 is provided with main thermistor 2011, and main thermistor 2011 is fixedly mounted on
The upper surface of shell 103, and the left and right sides of main thermistor 2011 is provided with pillar 101, passes through main thermistor 2011, Ke Yi
When fluid takes away the heat on its surface, decline the self-temperature of main thermistor 2011, resistance rises.
Further, before the top of fore shell 102 is provided with auxiliary thermistor 2012, and auxiliary thermistor 2012 is fixedly mounted on
The upper surface of shell 102, and the left and right sides of auxiliary thermistor 2011 is provided with pillar 101, by auxiliary thermistor 2012, can improve
The precision of surveyed wind speed, eliminate influences caused by variation of ambient temperature.
Further, the bottom of thermistor 201 is provided with corresponding bridge arm 2013, and corresponding bridge arm 2013 and thermistor
201 bottom is brought into close contact, and the other end of corresponding bridge arm 2013 is set by thermosensitive resistor and circuit 2, can by corresponding bridge arm 2013
To allow the power supply that main thermistor 2011 is connected with auxiliary thermistor 2012 to be held at a constant value, their resistance is allowed
It is equal, reduce error.
Further, thermosensitive resistor and circuit 2 is anterior is provided with potentiometer 202, and potentiometer 202 and thermosensitive resistor and circuit 2
Front portion is brought into close contact, and the resistance of corresponding bridge arm 2013 can be adjusted by potentiometer 202, and corresponding bridge arm 2013 can be kept just
Normal resistance.
Further, the front portion of single-chip microcomputer 3 is provided with T-shaped filter circuit 301, and T-shaped filter circuit 301 and single-chip microcomputer 3
Front portion is brought into close contact, and the quality of signal with the interference of harmonic carcellation, can be improved by T-shaped filter circuit 301, is reduced measured value and is missed
Difference.
Further, the front portion of fore shell 102 is provided with wind speed display screen 5, and wind speed display screen 5 is fixedly mounted on fore shell 102
Front portion, and the left and right sides of wind speed display screen 5 is provided with control button 501, passes through wind speed display screen 5, in that context it may be convenient to find out
Wind speed in current environment, more accurate numerical value is provided to survey wind speed.
Operation principle, first, NTC airspeedometers are opened, its start-up operation, thermistor electricity are controlled by control button 501
Access lithium battery 5 in road 2, then, there is electric current process in thermosensitive resistor and circuit 2, electric current reaches corresponding bridge arm by potentiometer 202
2013, then, electric current is supplied thermistor 201 by corresponding bridge arm 2013, meanwhile, thermosensitive resistor and circuit 2 controls these three parts
Main thermistor 2011 and auxiliary thermistor 2012 is allowed to start to warm up, when temperature is raised to a constant value, thermistor 201
Airspeedometer is placed on the place for needing to measure wind speed by can after radiating and internal heat balance, when having fluid from temperature-sensitive electricity
When around resistance 201 by taking away heat, the resistance of thermistor 201 can be made to increase, then, the heat lost can destroy temperature-sensitive electricity
The balance of 201 internal temperatures is hindered, meanwhile, the inside of thermistor 201 because electric current starts to warm up, reaches a new balance again
Point, the different equalization points of the temperature of thermistor 201 when corresponding to different wind speed, the corresponding output voltage of bridge arm 2013 and wind can be found out
Corresponding relation can between speed measures current wind speed, and then, signal is passed through connecting wire 3021 by thermosensitive resistor and circuit 2
Pass to single-chip microcomputer 3 and allow its processing data, Harmonics elimination can be prevented harmonic wave interference by T-shaped filter circuit 301 in the course of the work
Measurement.
Afterwards although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, may be used
It a variety of to the progress of these embodiments can be changed without departing from the principles and spirit of the present invention with understanding, changed, replaced
Change and modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of NTC airspeedometers, including upper lid（1）, it is characterised in that：The upper lid（1）Lower surface be provided with pillar（101）,
And the pillar（101）With upper lid（1）It is fixedly connected by screw, the pillar（101）Bottom be provided with rear shell（103）, institute
State rear shell（103）With pillar（101）Bottom be brought into close contact, the rear shell（103）Top be provided with thermistor（201）, and
The thermistor（201）It is fixedly mounted on rear shell（103）Top, the pillar（101）Bottom be provided with fore shell（102）,
The fore shell（102）With pillar（101）Bottom be brought into close contact, the fore shell（102）Inside be provided with single-chip microcomputer（3）, and institute
State single-chip microcomputer（3）Insertion is arranged on fore shell（102）Inside, the single-chip microcomputer（3）Right side be provided with AD conversion interface（302）,
And the AD conversion interface（302）With single-chip microcomputer（3）Right side be brought into close contact, the AD conversion interface（302）Right side be provided with
Connecting wire（3021）, and the connecting wire（3021）It is plugged on a/d converter（302）Right side be fixedly connected, the monolithic
Machine（3）Bottom be provided with lithium battery（4）, and the lithium battery（4）It is fixedly mounted on single-chip microcomputer（3）Bottom, the fore shell
（102）Front portion be provided with control button（501）, and the control button（501）With fore shell（102）Front portion be brought into close contact.
A kind of 2. NTC airspeedometers according to claim 1, it is characterised in that：The fore shell（102）Lower surface be provided with branch
Bar（104）, and the pole（104）With fore shell（102）Lower surface be fixedly connected by screw.
A kind of 3. NTC airspeedometers according to claim 1, it is characterised in that：The rear shell（103）Inside be provided with temperature-sensitive
Resistance circuit（2）, and the thermosensitive resistor and circuit（2）Insertion is arranged on rear shell（103）Inside, and thermosensitive resistor and circuit（2）
It is arranged on single-chip microcomputer（3）The back side.
A kind of 4. NTC airspeedometers according to claim 1, it is characterised in that：The rear shell（103）Top be provided with main heat
Quick resistance（2011）, and the main thermistor（2011）It is fixedly mounted on rear shell（103）Upper surface, and main thermistor
（2011）The left and right sides be provided with pillar（101）.
A kind of 5. NTC airspeedometers according to claim 1, it is characterised in that：The fore shell（102）Top be provided with auxiliary heat
Quick resistance（2012）, and the auxiliary thermistor（2012）It is fixedly mounted on fore shell（102）Upper surface, and auxiliary thermistor
（2011）The left and right sides be provided with pillar（101）.
A kind of 6. NTC airspeedometers according to claim 1, it is characterised in that：The thermistor（201）Bottom be provided with
Corresponding bridge arm（2013）, and the corresponding bridge arm（2013）With thermistor（201）Bottom be brought into close contact, and corresponding bridge arm
（2013）The other end set by thermosensitive resistor and circuit（2）.
A kind of 7. NTC airspeedometers according to claim 1, it is characterised in that：The thermosensitive resistor and circuit（2）Front portion is provided with
Potentiometer（202）, and the potentiometer（202）With thermosensitive resistor and circuit（2）Front portion be brought into close contact.
A kind of 8. NTC airspeedometers according to claim 1, it is characterised in that：The single-chip microcomputer（3）Front portion be provided with it is T-shaped
Filter circuit（301）, and the T-shaped filter circuit（301）With single-chip microcomputer（3）Front portion be brought into close contact.
A kind of 9. NTC airspeedometers according to claim 1, it is characterised in that：The fore shell（102）Front portion be provided with wind speed
Display screen（5）, and the wind speed display screen（5）It is fixedly mounted on fore shell（102）Front portion, and wind speed display screen（5）Left and right
Both sides are provided with control button（501）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711317746.5A CN107741507A (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711317746.5A CN107741507A (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107741507A true CN107741507A (en) | 2018-02-27 |
Family
ID=61240041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711317746.5A Pending CN107741507A (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107741507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577199A (en) * | 2019-09-30 | 2021-03-30 | 芜湖美的厨卫电器制造有限公司 | Water heating device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08285880A (en) * | 1995-04-19 | 1996-11-01 | Kurabe Ind Co Ltd | Wind velocity detector |
| CN2886578Y (en) * | 2006-04-28 | 2007-04-04 | 北京联合大学 | Thermal anemometer |
| CN103217549A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Thermistor type air velocity transducer with temperature compensation |
| CN203688579U (en) * | 2014-02-07 | 2014-07-02 | 广西桂测科技有限公司 | Anemometer |
| CN106018874A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Environmental wind speed monitoring system based on filter circuit and power supply controller |
| CN106383248A (en) * | 2016-10-27 | 2017-02-08 | 广东奥迪威传感科技股份有限公司 | Speed testing device based on thermistors |
| CN206489181U (en) * | 2017-03-03 | 2017-09-12 | 风脉能源（武汉）股份有限公司 | A kind of portable hot line wind speed measuring device and system |
| CN208689071U (en) * | 2017-12-12 | 2019-04-02 | 湖南普信工程技术有限公司 | A kind of NTC airspeedometer |
-
2017
- 2017-12-12 CN CN201711317746.5A patent/CN107741507A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08285880A (en) * | 1995-04-19 | 1996-11-01 | Kurabe Ind Co Ltd | Wind velocity detector |
| CN2886578Y (en) * | 2006-04-28 | 2007-04-04 | 北京联合大学 | Thermal anemometer |
| CN103217549A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Thermistor type air velocity transducer with temperature compensation |
| CN203688579U (en) * | 2014-02-07 | 2014-07-02 | 广西桂测科技有限公司 | Anemometer |
| CN106018874A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Environmental wind speed monitoring system based on filter circuit and power supply controller |
| CN106383248A (en) * | 2016-10-27 | 2017-02-08 | 广东奥迪威传感科技股份有限公司 | Speed testing device based on thermistors |
| CN206489181U (en) * | 2017-03-03 | 2017-09-12 | 风脉能源（武汉）股份有限公司 | A kind of portable hot line wind speed measuring device and system |
| CN208689071U (en) * | 2017-12-12 | 2019-04-02 | 湖南普信工程技术有限公司 | A kind of NTC airspeedometer |
Non-Patent Citations (1)
| Title |
|---|
| 周开基等: "电磁兼容性原理 （第二版）", 31 January 2016, 哈尔滨工程大学出版社, pages: 199 - 201 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577199A (en) * | 2019-09-30 | 2021-03-30 | 芜湖美的厨卫电器制造有限公司 | Water heating device |
| CN112577200A (en) * | 2019-09-30 | 2021-03-30 | 芜湖美的厨卫电器制造有限公司 | Wind speed measuring assembly, gas combustion equipment and control method of gas combustion equipment |
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