CN208689071U - A kind of NTC airspeedometer - Google Patents
A kind of NTC airspeedometer Download PDFInfo
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- CN208689071U CN208689071U CN201721723506.0U CN201721723506U CN208689071U CN 208689071 U CN208689071 U CN 208689071U CN 201721723506 U CN201721723506 U CN 201721723506U CN 208689071 U CN208689071 U CN 208689071U
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- thermistor
- pillar
- front housing
- airspeedometer
- ntc
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Abstract
The utility model discloses a kind of NTC airspeedometers, including upper cover, the lower surface of upper cover is equipped with pillar, and pillar is fixedly connected with upper cover by screw, the bottom of pillar is equipped with rear shell, the bottom of rear shell and pillar fits closely, and the top of rear shell is equipped with thermistor, and thermistor is fixedly mounted on the top of rear shell, the bottom of pillar is equipped with front housing, the bottom of front housing and pillar fits closely, and the inside of front housing is equipped with single-chip microcontroller, and the inside of front housing is arranged in single-chip microcontroller insertion.The NTC airspeedometer mainly passes through one piece of lithium battery power supply, it will be in stable electric current aid to 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 heat dissipation on surface reaches a stable value by the heat generated with electric current, when fluid takes away the temperature of thermistor surface, the airspeedometer for generating the corresponding relationship between different voltage and wind speed to design is risen by its resistance value.
Description
Technical field
The utility model relates to airspeedometer field, specially a kind of NTC airspeedometer.
Background technique
The measurement of air velocity (abbreviation wind speed) is a kind of measurement of important parameter, in the lab, environment purification, industry
It is all used widely in the measurement of the multiple spots such as health, ventilating system, jet system, air-conditioning equipment air speed.
But existing airspeedometer, volume is generally bigger, and internal part is more, and cost is high, and range is also big, is not suitable in wind speed
Small place uses, and inconvenient to carry, will receive the interference of harmonic wave in the measurements, deviation usually occur in data.
So how to design a kind of NTC airspeedometer, becoming us will currently be solved the problems, such as.
Utility model content
The purpose of this utility model is to provide a kind of NTC airspeedometers, to solve wind speed mentioned above in the background art
The problem of meter.
To achieve the above object, the utility model provides the following technical solutions: a kind of NTC airspeedometer, including upper cover, described
The lower surface of upper cover is equipped with pillar, and the pillar is fixedly connected with upper cover by screw, and the bottom of the pillar is equipped with rear shell,
The bottom of the rear shell and pillar fits closely, and the top of the rear shell is equipped with thermistor, and the fixed peace of the thermistor
Mounted in the top of rear shell, the bottom of the pillar is equipped with front housing, and the bottom of the front housing and pillar fits closely, the front housing
Inside is equipped with single-chip microcontroller, and the inside of front housing is arranged in single-chip microcontroller insertion, and the right side of the single-chip microcontroller connects equipped with AD conversion
Mouthful, and fitted closely on the right side of the AD conversion interface and single-chip microcontroller, the right side of the AD conversion interface is equipped with connecting wire, and
The connecting wire is plugged on the right side of AD conversion interface and is fixedly connected, and the bottom of the single-chip microcontroller is equipped with lithium battery, and described
Lithium battery is fixedly mounted on the bottom of single-chip microcontroller, and the front of the front housing is equipped with control button, and the control button and front housing
Front fit closely.
Further, the lower surface of the front housing is equipped with strut, and the lower surface of the strut and front housing is solid by screw
Fixed connection.
Further, the inside of the rear shell is equipped with thermosensitive resistor and circuit, and thermosensitive resistor and circuit insertion setting exists
The inside of rear shell, and the back side of single-chip microcontroller is arranged in thermosensitive resistor and circuit.
Further, the top of the rear shell is equipped with main thermistor, and the main thermistor is fixedly mounted on rear shell
Upper surface, and the left and right sides of main thermistor be equipped with pillar.
Further, the top of the front housing is equipped with auxiliary thermistor, and the auxiliary thermistor is fixedly mounted on front housing
Upper surface, and the left and right sides of auxiliary thermistor be equipped with pillar.
Further, the bottom of the thermistor is equipped with corresponding bridge arm, and the bottom of the corresponding bridge arm and thermistor
Portion fits closely, and the other end of corresponding bridge arm is set by thermosensitive resistor and circuit.
Further, the thermosensitive resistor and circuit front is equipped with potentiometer, and the potentiometer and thermosensitive resistor and circuit
Front fits closely.
Further, the front of the single-chip microcontroller is equipped with T-type filter circuit, and the T-type filter circuit and single-chip microcontroller
Front fits closely.
Further, the front of the front housing is equipped with wind speed display screen, and the wind speed display screen is fixedly mounted on front housing
Front, and the left and right sides of wind speed display screen be equipped with control button.
It is supplied compared with prior art, the utility model has the beneficial effects that the NTC airspeedometer mainly passes through one piece of lithium battery
Electricity will allow thermistor heating power in stable electric current aid to two groups of thermistors by thermosensitive resistor and circuit, then temperature-sensitive
When the temperature of resistance rises to a stationary value, the heat dissipation on surface reaches a stable value by the heat generated with electric current,
When fluid takes away the temperature of thermistor surface, rise the corresponding pass generated between different voltage and wind speed by its resistance value
It is the airspeedometer to design, the airspeedometer structure that this kind is designed using thermistor is simple, in addition to external fixation and protection
Outside device, just by the device of fever and with auxiliary device with regard to the measured value of achievable wind speed, compared with other airspeedometers, this kind
The inner body of NTC airspeedometer is few, so cheap, small in size, range is also relatively small, more suitable for laboratory, purification
The such air in room flows comparatively gentle environment, measures small wind speed, and the inside of this kind of airspeedometer is equipped with monolithic
Machine, can be to its input signal, in order to reduce error, and the inside of this kind of airspeedometer has installed a T-type filter circuit, Ke Yi additional
The quality of the interference promotion signal of harmonic carcellation when airspeedometer works.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the shell main view sectional view of the utility model；
Fig. 3 is the thermosensitive resistor and circuit figure of the utility model.
Fig. 4 is the T-type filter circuit figure of the utility model.
In figure: 1, upper cover, 101, pillar, 102, front housing, 103, rear shell, 104, strut, 2, thermosensitive resistor and circuit, 201, heat
Quick resistance, 2011, main thermistor, 2012, auxiliary thermistor, 2013 corresponding bridge arms, 202, potentiometer, 3, single-chip microcontroller, 301, T
Type filter circuit, 302, AD conversion interface, 3021, connecting wire, 4, lithium battery, 5, wind speed display screen, 501, control button.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-4 is please referred to, the utility model provides a kind of technical solution: a kind of NTC airspeedometer, including upper cover 1, upper cover 1
Lower surface be equipped with pillar 101, and pillar 101 is fixedly connected with upper cover 1 by screw, and the bottom of pillar 101 is equipped with rear shell
103, rear shell 103 and the bottom of pillar 101 fit closely, and the top of rear shell 103 is equipped with thermistor 201, and thermistor
201 are fixedly mounted on the top of rear shell 103, and the bottom of pillar 101 is equipped with front housing 102, the bottom of front housing 102 and pillar 101
It fits closely, the inside of front housing 102 is equipped with single-chip microcontroller 3, and single-chip microcontroller 3 is embedded in the inside that front housing 102 is arranged in, single-chip microcontroller 3
Right side is equipped with AD conversion interface 302, and AD conversion interface 302 and the right side of single-chip microcontroller 3 fit closely, AD conversion interface 302
Right side be equipped with connecting wire 3021, and connecting wire 3021 is plugged on the right side of AD conversion interface 302 and is fixedly connected, monolithic
The bottom of machine 3 is equipped with lithium battery 4, and lithium battery 4 is fixedly mounted on the bottom of single-chip microcontroller 3, and the front of front housing 102 is equipped with control and presses
Button 501, and control button 501 and the front of front housing 102 fit closely.
Further, the lower surface of front housing 102 is equipped with strut 104, and the lower surface of strut 104 and front housing 102 passes through spiral shell
Nail is fixedly connected, and by strut 104, the main component of NTC airspeedometer can be supported, thermistor 201 can be contacted
To more wind, the accuracy of measured value is improved.
Further, the inside of rear shell 103 is equipped with thermosensitive resistor and circuit 2, and the insertion of thermosensitive resistor and circuit 2 is arranged in rear shell
103 inside, and the back side of single-chip microcontroller 3 is arranged in thermosensitive resistor and circuit 2, by thermosensitive resistor and circuit 2, can give temperature-sensitive electricity
201 1 stable electric currents are hindered, thermistor 201 is heated, temperature rises.
Further, after the top of rear shell 103 is equipped 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 equipped 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 value rises.
Further, before the top of front housing 102 is equipped 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 2012 is equipped with pillar 101 and can be improved by auxiliary thermistor 2012
The precision of surveyed wind speed eliminates the influence that variation of ambient temperature generates.
Further, the bottom of thermistor 201 is equipped with corresponding bridge arm 2013, and corresponding bridge arm 2013 and thermistor
201 bottom fits closely, and the other end of corresponding bridge arm 2013 is set by thermosensitive resistor and circuit 2, can by corresponding bridge arm 2013
It is held at a constant value with the power supply for allowing main thermistor 2011 to connect with auxiliary thermistor 2012, allows their resistance
It is worth equal, reduction error.
Further, 2 front of thermosensitive resistor and circuit is equipped with potentiometer 202, and potentiometer 202 and thermosensitive resistor and circuit 2
Front fits closely, and by the resistance value of the adjustable corresponding bridge arm 2013 of potentiometer 202, corresponding bridge arm 2013 can be kept just
Normal resistance value.
Further, the front of single-chip microcontroller 3 is equipped with T-type filter circuit 301, and T-type filter circuit 301 and single-chip microcontroller 3
Front fits closely, and can improve the quality of signal by T-type filter circuit 301 with the interference of harmonic carcellation, reduce measured value and miss
Difference.
Further, the front of front housing 102 is equipped with wind speed display screen 5, and wind speed display screen 5 is fixedly mounted on front housing 102
Front, and the left and right sides of wind speed display screen 5 be equipped with control button 501, pass through wind speed display screen 5, it may be convenient to find out
Wind speed in current environment provides more accurate numerical value to survey wind speed.
Working principle controls its start-up operation, thermistor electricity by control button 501 firstly, opening NTC airspeedometer
Lithium battery 5 is accessed 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 components
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 can be placed on to the place for needing to measure wind speed after heat dissipation and internal heat balance, when having fluid from temperature-sensitive electricity
When around resistance 201 by taking away heat, increase 201 resistance value of thermistor, then, the heat lost can destroy temperature-sensitive electricity
The balance of 201 internal temperatures is hindered, meanwhile, 201 inside of thermistor reaches a new balance again because electric current starts to warm up
Point, the different equalization points of 201 temperature of thermistor, can find out corresponding 2013 output voltage of bridge arm and wind when corresponding to different wind speed
Corresponding relationship between speed can measure current wind speed, and then, signal is passed through connecting wire 3021 by thermosensitive resistor and circuit 2
Passing to single-chip microcontroller 3 allows it to handle data, and Harmonics elimination can be prevented harmonic wave interference by T-type filter circuit 301 during the work time
Measurement.
While there has been shown and described that the embodiments of the present invention afterwards, for those of ordinary skill in the art and
Speech, it is possible to understand that a variety of changes can be carried out to these embodiments in the case where not departing from the principles of the present invention and spirit
Change, modification, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (9)
1. a kind of NTC airspeedometer, including upper cover (1), it is characterised in that: the lower surface of the upper cover (1) is equipped with pillar (101),
And the pillar (101) is fixedly connected with upper cover (1) by screw, the bottom of the pillar (101) is equipped with rear shell (103), institute
It states rear shell (103) and the bottom of pillar (101) fits closely, the top of the rear shell (103) is equipped with thermistor (201), and
The thermistor (201) is fixedly mounted on the top of rear shell (103), and the bottom of the pillar (101) is equipped with front housing (102),
The front housing (102) and the bottom of pillar (101) fit closely, and the inside of the front housing (102) is equipped with single-chip microcontroller (3), and institute
Single-chip microcontroller (3) insertion setting is stated in the inside of front housing (102), the right side of the single-chip microcontroller (3) is equipped with AD conversion interface (302),
And fitted closely on the right side of the AD conversion interface (302) and single-chip microcontroller (3), the right side of the AD conversion interface (302) is equipped with
Connecting wire (3021), and the connecting wire (3021) is plugged on the right side of AD conversion interface (302) and is fixedly connected, the list
The bottom of piece machine (3) is equipped with lithium battery (4), and the lithium battery (4) is fixedly mounted on the bottom of single-chip microcontroller (3), the front housing
(102) front is equipped with control button (501), and the control button (501) and the front of front housing (102) fit closely.
2. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the lower surface of the front housing (102) is equipped with branch
Bar (104), and the strut (104) is fixedly connected with the lower surface of front housing (102) by screw.
3. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the inside of the rear shell (103) is equipped with temperature-sensitive
Resistance circuit (2), and the thermosensitive resistor and circuit (2) insertion is arranged in the inside of rear shell (103), and thermosensitive resistor and circuit (2)
The back side in single-chip microcontroller (3) is set.
4. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the top of the rear shell (103) is equipped with main heat
Quick resistance (2011), and the main thermistor (2011) is fixedly mounted on the upper surface of rear shell (103), and main thermistor
(2011) the left and right sides is equipped with pillar (101).
5. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the top of the front housing (102) is equipped with auxiliary heat
Quick resistance (2012), and the auxiliary thermistor (2012) is fixedly mounted on the upper surface of front housing (102), and auxiliary thermistor
(2012) the left and right sides is equipped with pillar (101).
6. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the bottom of the thermistor (201) is equipped with
Corresponding bridge arm (2013), and the corresponding bridge arm (2013) and the bottom of thermistor (201) fit closely, and corresponding bridge arm
(2013) the other end is set by thermosensitive resistor and circuit (2).
7. a kind of NTC airspeedometer according to claim 3, it is characterised in that: thermosensitive resistor and circuit (2) front is equipped with
Potentiometer (202), and the potentiometer (202) and the front of thermosensitive resistor and circuit (2) fit closely.
8. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the front of the single-chip microcontroller (3) is equipped with T-type
Filter circuit (301), and the T-type filter circuit (301) and the front of single-chip microcontroller (3) fit closely.
9. a kind of NTC airspeedometer according to claim 1, it is characterised in that: the front of the front housing (102) is equipped with wind speed
Display screen (5), and the wind speed display screen (5) is fixedly mounted on the front of front housing (102), and the left and right of wind speed display screen (5)
Two sides are equipped with control button (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723506.0U CN208689071U (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723506.0U CN208689071U (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208689071U true CN208689071U (en) | 2019-04-02 |
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ID=65875140
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721723506.0U Active CN208689071U (en) | 2017-12-12 | 2017-12-12 | A kind of NTC airspeedometer |
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| Country | Link |
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| CN (1) | CN208689071U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741507A (en) * | 2017-12-12 | 2018-02-27 | 湖南普信工程技术有限公司 | A kind of NTC airspeedometers |
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2017
- 2017-12-12 CN CN201721723506.0U patent/CN208689071U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741507A (en) * | 2017-12-12 | 2018-02-27 | 湖南普信工程技术有限公司 | A kind of NTC airspeedometers |
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