CN86106737A - Microwind-guage - Google Patents
Microwind-guage Download PDFInfo
- Publication number
- CN86106737A CN86106737A CN86106737.1A CN86106737A CN86106737A CN 86106737 A CN86106737 A CN 86106737A CN 86106737 A CN86106737 A CN 86106737A CN 86106737 A CN86106737 A CN 86106737A
- Authority
- CN
- China
- Prior art keywords
- air
- flow
- microwind
- guage
- quickens
- 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.)
- Withdrawn
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Measuring Volume Flow (AREA)
Abstract
Microwind-guage quickens pipeline by air-flow and bridge diagram is formed.Its air-flow quickens the brachium pontis of ducted sensor-resistance wire as electric bridge.Have highly sensitively, measurement range is big, measures characteristic of accurate.Advantages such as it is little to have volume, easy to carry.Be widely used in the tunnel, mine, wind speed in the ventilating engineering of civil air defense constructions and installations and buildings and air measuring and fan air flow detect.In any industry that needs to measure little wind speed of atmospheric pollution research and other and research department, all can be used widely.
Description
The present invention is a kind of high sensitivity, a high-precision measuring instrument of measuring gentle breeze.
Normally used vane type wind gage and hot-bulb anemoscope all are subjected to the influence of environment temperature, and measurement range is little, and more than 0.4 meter per second, and these two kinds of knotmeter sensitivity are all not high as the starting wind velocity of vane type wind gage, and accuracy is also not too high.
The objective of the invention is to make a kind of highly sensitive, measure accurately, scope is big, is not subjected to the novel Microwind-guage of wind speed, wind direction and ambient temperature effect.
The present invention quickens pipeline by air-flow and bridge diagram is formed, wherein air-flow quickens pipe ends and makes toroidal, and the sensor of gentle breeze knotmeter-be sensitive resistance silk is positioned at air-flow and quickens narrow throat in the middle of the pipeline, and as a brachium pontis of electric bridge, is considered as R
1With R
1Corresponding brachium pontis R
2Select for use and sensitive resistance silk R
1Identical materials, and place air-flow.Four brachium pontis must satisfy the following relationship formula in bridge design.That is:
R
1＜＜（R
5+R
3）;（R
1+R
3）＜＜（R
2+R
4）
R wherein
5For current limliting is regulated resistance.
When airflow passes was quickened pipeline, descended by its temperature of the sensitive resistance silk of current flow heats, resistance value changed thereupon, destroys the balance of electric bridge, thereby obtains output voltage E, makes output voltage E become certain E=f(v with gas velocity v) funtcional relationship.Experiment showed, when gas velocity more hour, E=f(v) slope of this function relation curve is big more, therefore is particularly suitable for measuring very little wind speed.
The sensitive resistance silk of this novel Microwind-guage owing to be positioned at the throat that air-flow quickens pipeline, is suitably selected the parameter and the material of four brachium pontis of electric bridge again, can realize not being subjected to the influence of wind speed, wind direction and environment temperature, and highly sensitive, to measure accurately, measurement range is big.
The present invention has following accompanying drawing:
Accompanying drawing 1: air-flow quickens the pipeline structural drawing.
Accompanying drawing 2: bridge diagram sketch.
With accompanying drawing 1 and accompanying drawing 2, embodiments of the invention are described below.The air-flow of present embodiment quickens pipeline, adopts organic glass (also available metal material) to make, the shape of its pipeline, and two ends are toroidal, and the centre is narrow throat, sensitive resistance silk R
1Selected is 5 microns tungsten filament is arranged in and quickens the narrowest throat of pipeline, and measured air-flow quickens through quickening pipeline, thereby the influence of natural convection is reduced relatively, has improved measuring accuracy.Simultaneously owing to quicken the geometric properties of pipeline, make the venturi place flow velocity and flow within the specific limits, be not subjected to the influence of outside distinguished and admirable flow direction.In addition, quickening pipeline can also shield.
Sensitive resistance silk R
1As a brachium pontis of electric bridge, the electric current that passes through should keep a constant little electric current.With R
4A corresponding brachium pontis R
2Also be to select for use 5 microns tungsten filament to make, and quicken the pipeline air flow stream around air-flow and go on the shell of an end, make it to place air-flow, can overcome the influence of variation of ambient temperature.The design of four brachium pontis of electric bridge must meet following relationship, that is: R
1＜＜(R
5+ R
3); (R
1+ R
3(the R of)＜＜
2+ R
4)
The output of this Microwind-guage (E) can connect common pointer instrument, also can connect the electronics display instrument.
The characteristics of this Microwind-guage are that measurement category is big, and the lower limit of tested wind speed is less than 0.1 meter per second, and maximum measuring wind can be greater than tens meters of per seconds. And sensitivity and precision are all high, and wind-engaging is not to the impact of variation and variation of ambient temperature. Portable, volume little (weight is no more than 2 kilograms), cost is low, and is easy to carry. Be applicable to the tunnel, mine, the wind speed in the ventilating engineering of civil air defense constructions and installations and building and air measuring, and fan air flow detects. In any industry that needs to measure little wind speed of atmosphere pollution research and other and research department, all can be used widely.
Claims (3)
1, a kind of highly sensitive Microwind-guage is characterized in that being made up of air-flow acceleration pipeline and bridge diagram.
2, Microwind-guage according to claim 1 is characterized in that air-flow quickens pipe ends and is hydraucone, and the centre is narrow throat.Sensitive resistance silk R
1Be positioned at narrow throat.
3, Microwind-guage according to claim 1 and 2 is characterized in that a brachium pontis in the electric bridge is sensitive resistance silk R
1, with R
1Corresponding brachium pontis R
2Select for use and R
1Identical materials also places air-flow, and R
1＜＜(R
5+ R
3); (R
1+ R
3(the R of)＜＜
2+ R
4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106737 CN1007376B (en) | 1986-09-29 | 1986-09-29 | Microwind-guage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106737 CN1007376B (en) | 1986-09-29 | 1986-09-29 | Microwind-guage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86106737A true CN86106737A (en) | 1988-04-13 |
| CN1007376B CN1007376B (en) | 1990-03-28 |
Family
ID=4803342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86106737 Expired CN1007376B (en) | 1986-09-29 | 1986-09-29 | Microwind-guage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007376B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699687A (en) * | 2016-01-22 | 2016-06-22 | 北京至感传感器技术研究院有限公司 | Wind speed and direction detection device |
| CN104215794B (en) * | 2014-09-09 | 2017-03-29 | 宁波高新区甬港现代消防设计研究院有限公司 | A kind of sensitive-type wind speed detector for fire protection |
| CN110160669A (en) * | 2019-04-23 | 2019-08-23 | 江苏深农智能科技有限公司 | A kind of poultry cultivation sendible temperature detection device and method |
| CN110292753A (en) * | 2019-08-02 | 2019-10-01 | 黄淮学院 | A kind of musical respiration training instrument |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU677173B2 (en) * | 1990-03-23 | 1997-04-17 | Vontech International Corporation | Interground fiber cement |
-
1986
- 1986-09-29 CN CN 86106737 patent/CN1007376B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215794B (en) * | 2014-09-09 | 2017-03-29 | 宁波高新区甬港现代消防设计研究院有限公司 | A kind of sensitive-type wind speed detector for fire protection |
| CN105699687A (en) * | 2016-01-22 | 2016-06-22 | 北京至感传感器技术研究院有限公司 | Wind speed and direction detection device |
| CN110160669A (en) * | 2019-04-23 | 2019-08-23 | 江苏深农智能科技有限公司 | A kind of poultry cultivation sendible temperature detection device and method |
| CN110160669B (en) * | 2019-04-23 | 2021-06-04 | 江苏深农智能科技有限公司 | Meat poultry breeding sensible temperature detection device and method |
| CN110292753A (en) * | 2019-08-02 | 2019-10-01 | 黄淮学院 | A kind of musical respiration training instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1007376B (en) | 1990-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |