CN201130087Y - Airflow detecting device - Google Patents
Airflow detecting device Download PDFInfo
- Publication number
- CN201130087Y CN201130087Y CNU2007200618461U CN200720061846U CN201130087Y CN 201130087 Y CN201130087 Y CN 201130087Y CN U2007200618461 U CNU2007200618461 U CN U2007200618461U CN 200720061846 U CN200720061846 U CN 200720061846U CN 201130087 Y CN201130087 Y CN 201130087Y
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- China
- Prior art keywords
- differential amplifier
- circuit
- resistance
- detecting device
- model
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an air current detecting device, which comprises a working power supply, and a detecting circuit, an amplifying circuit and a display circuit which are connected in turn. The utility model is characterized in that the detecting circuit is a resistance bridge which is formed by electrical resistance R1, R2, W1 and Rt, wherein the Rt is a thermo-sensitive resistor, the amplifying circuit is a differential amplifier, the output end of the resistance bridge is connected with the input end of the differential amplifier, and the display circuit is jumped between two input ends of the differential amplifier. The thermo-sensitive resistor can detect the variation of temperatures, temperature signals are conversed into input signals of the differential amplifier through the resistance bridge, which are finally output to the display circuit, thereby a competitor can understand the air current variation where an airplane model stays, the competitor can avoid subsidence zones, who can make full use of upward current to get better competition results.
Description
Technical field
The utility model relates to a kind of device that adopts electronic devices and components to detect variations in flow.
Background technology
As everyone knows, in the model airplane contest, there is certain influence in the variation of air-flow to the demonstration of model airplane.The air-flow that rises can the auxiliary aviation model flight, the air-flow that sinks then can hinder the flight of model airplane.If the entrant can utilize the auxiliary power of the air-flow of rising as model airplane, will get preferable contest achievement.Yet because the variation of air-flow generally is fainter, the entrant is difficult to know in the model airplane environment of living in, and air-flow is last that sink or rising.
Summary of the invention
The technical problems to be solved in the utility model is, a kind of airflow detecting device is provided, and can conveniently detect the faint variation of air-flow.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of airflow detecting device, comprise working power, and the testing circuit, amplifying circuit and the display circuit that connect successively; Testing circuit is the resistance bridge of being made up of resistance R 1, R2, W1, Rt, and wherein Rt is a thermistor; Amplifying circuit is a differential amplifier; The output terminal of resistance bridge is connected with the input end of differential amplifier, and display circuit is connected across between two output terminals of differential amplifier.Employing comes the testing environment variation of temperature to the thermistor of temperature variation sensitivity, and is electric signal with the change transitions of environment temperature, after differential amplifier amplifies, exports display circuit to.The entrant just can know the air-flow situation of model airplane by observing the video data of display circuit, and is convenient and swift.
Above-mentioned working power comprises solar panels, and the polar capacitor that is connected in parallel on the solar panels two ends.Solar panels are converted to electric energy with sun power, and store into and give testing circuit, differential amplifier circuit power supply, energy-conserving and environment-protective on the polar capacitor.
Above-mentioned polar capacitor comprises capacitor C 1 and the C2 that is in parallel.Capacitor C 1, C2 are in parallel, and have increased the capacity of stored charge, the stable energy are provided for the reliably working of circuit.
The utility model adopts the variation of thermistor detected temperatures, and transfers temperature signal the input signal of differential amplifier to by resistance bridge, exports display circuit at last to.The entrant can know the variations in flow of model airplane environment of living in efficiently and easily, thereby makes model airplane avoid the air-flow sinker area, and makes full use of the air-flow of rising, so that obtain better contest achievement.In addition, the utility model also can be applicable in social industrial and agricultural production and the scientific experiment.
Description of drawings
Fig. 1 is an electric theory diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, 2, the utility model comprises working power, and the testing circuit, amplifying circuit and the display circuit that connect successively.Testing circuit is the resistance bridge of being made up of resistance R 1, R2, W1, Rt, and wherein Rt is a thermistor, and resistance W1 is an adjustable resistance, regulates resistance W1 and can make resistance bridge return balance.Amplifying circuit is the differential amplifier that resistance R 3-R7, resistance W2, triode BG1, BG2 form, and to the correct operation of differential amplifier, can realize by regulating adjustable resistance W2.Draw two output terminals of resistance bridge from the series connection node of the series connection node of adjustable resistance W1 and thermistor Rt, resistance R 1, R2 respectively.Two output terminals of this of resistance bridge are connected with two differential input terminals of differential amplifier respectively.Display circuit is a reometer, and its two ends are connected across between two output terminals of differential amplifier.
The utility model adopts solar panels DC and polar capacitor to compose in parallel working power.In order to improve the stability of current work, the positive pole of solar panels DC is connected with the anode of diode D, and the negative electrode of diode D is connected with the positive pole of polar capacitor.In order to improve the memory capacity of electric charge, polar capacitor adopts capacitor C 1, the C2 that is in parallel.
During the utility model work, sun power electroplax DC absorbs sun power to capacitor C 1, C2 charging; Capacitor C 1, C2 discharge, thus differential amplifier, resistance bridge power supply given.When changing appearred in the temperature of environment, the resistance of thermistor changed, the resistance bridge out of trim; Differential amplifier has the signal input, and it exports reometer to and shown, thereby tell the situation of change of operator's air-flow after input signal is amplified.
Claims (6)
1. an airflow detecting device comprises working power, and the testing circuit, amplifying circuit and the display circuit that connect successively, it is characterized in that: the resistance bridge of testing circuit for forming by resistance R 1, R2, W1, Rt, and wherein Rt is a thermistor; Amplifying circuit is a differential amplifier; The output terminal of resistance bridge is connected with the input end of differential amplifier, and display circuit is connected across between two output terminals of differential amplifier.
2. airflow detecting device according to claim 1 is characterized in that: described working power comprises solar panels, and the polar capacitor that is connected in parallel on the solar panels two ends.
3. airflow detecting device according to claim 1 is characterized in that: described display circuit is a reometer.
4. airflow detecting device according to claim 1 is characterized in that: described resistance W1 is an adjustable resistance.
5. airflow detecting device according to claim 2 is characterized in that: described solar panels are connected with diode D.
6. airflow detecting device according to claim 2 is characterized in that: described polar capacitor comprises capacitor C 1 and the C2 that is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200618461U CN201130087Y (en) | 2007-12-20 | 2007-12-20 | Airflow detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200618461U CN201130087Y (en) | 2007-12-20 | 2007-12-20 | Airflow detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201130087Y true CN201130087Y (en) | 2008-10-08 |
Family
ID=40017947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200618461U Expired - Fee Related CN201130087Y (en) | 2007-12-20 | 2007-12-20 | Airflow detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201130087Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238635A (en) * | 2018-09-21 | 2019-01-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of device and its application for measuring flow rotation intensity |
| CN110221094A (en) * | 2019-07-16 | 2019-09-10 | 深圳市锐进微电子有限公司 | Airflow detection circuit and device |
-
2007
- 2007-12-20 CN CNU2007200618461U patent/CN201130087Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238635A (en) * | 2018-09-21 | 2019-01-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of device and its application for measuring flow rotation intensity |
| CN110221094A (en) * | 2019-07-16 | 2019-09-10 | 深圳市锐进微电子有限公司 | Airflow detection circuit and device |
| CN110221094B (en) * | 2019-07-16 | 2021-05-04 | 深圳市锐进微电子有限公司 | Airflow detection circuit and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |