CN204679522U - A kind of in large space to the device that air-flow velocity is measured - Google Patents
A kind of in large space to the device that air-flow velocity is measured Download PDFInfo
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- CN204679522U CN204679522U CN201520394923.XU CN201520394923U CN204679522U CN 204679522 U CN204679522 U CN 204679522U CN 201520394923 U CN201520394923 U CN 201520394923U CN 204679522 U CN204679522 U CN 204679522U
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Abstract
The utility model proposes a kind of in large space to the device that air-flow velocity is measured.Comprise ultrasonic drive, data acquisition card, industrial computer, driving amplifier, large pipeline, ultrasonic sensor, band lead to small signal amplifier; Described ultrasonic sensor comprises to be launched ultrasonic sensor and receives ultrasonic sensor, launch ultrasonic sensor and receive ultrasonic sensor and be arranged on the inwall of large pipeline both sides, and corresponding two the reception ultrasonic sensors of transmitting ultrasonic sensor; Described ultrasonic drive and data acquisition card are integrated in industrial computer.The utility model improves fluid-velocity survey precision.
Description
Technical field
The utility model belongs to fluid-velocity survey technical field, be specifically related to a kind of in large space to the device that air-flow velocity is measured.
Background technology
Patent CN102156112B discloses a kind of flue gas flow rate measuring instrument and measuring method, include light emission system and optical receiver system that two components are located at flue both sides, but this device is easily subject to the pollution of the impurity in flue, thus affects measuring accuracy.
Patent CN203479824U discloses a kind of Pitot tube arrangement detectd a flue gas flow rate more and measure, comprise the pitot tube that at least two group length are different, use this device, because working environment space is large, flow velocity is low, the pressure reduction of measurement can be caused less, affect fluid-velocity survey precision, be also easily subject to the pollution of the impurity in flue simultaneously, cause pitot tube to block.
Patent CN102253237A discloses a kind of flow rate measuring device and the method that are applied to ultrasonic calorimeter.This flow rate measuring device is by measuring base table pipeline and integrating instrument forms.This device be suitable for flow velocity higher time fluid-velocity survey, for the measurement compared with low flow velocity, higher precision can not be ensured.
Patent CN100585405C discloses a kind of micromechanical silicon resonance type air flow rate sensor being applicable to low velocity gas and measuring, process based on micro-electronic mechanical skill, by glass substrate, the fixed tuning fork harmonic oscillator of both-end, low stress membrane, micro leverage structure, anchor point and contact conductor form; When gas flow is out-of-date, low stress membrane is responded to the flowing of gas and deformation occurs, this deformation is converted into effect of stress in both-end clamped formula tuning fork harmonic oscillator by micro leverage structure, by detecting the change of tuning fork harmonic oscillator natural frequency, realizes the measurement to gas flow rate.But its structure and complex process, high to the accuracy requirement made, and also a small amount of dust stratification on sensor will affect its measuring accuracy.
Above-mentioned existing air-flow velocity measurement mechanism, have be limited to low flow velocity, have be limited to large space, feature that pressure reduction is little, what also have is limited to the requirements such as complex manufacturing technology, causes ensureing higher fluid-velocity survey precision.
Summary of the invention
The purpose of this utility model be to propose a kind of in large space to the device that air-flow velocity is measured, it has directional, concentration of energy, and reflection potential is comparatively strong, and stream field, without advantages such as additional interference, improves fluid-velocity survey precision.
In order to solve the problems of the technologies described above, the present invention propose a kind of in large space to the device that air-flow velocity is measured, comprise ultrasonic drive, data acquisition card, industrial computer, driving amplifier, large pipeline, ultrasonic sensor, band lead to small signal amplifier; Described ultrasonic sensor comprises to be launched ultrasonic sensor and receives ultrasonic sensor, launch ultrasonic sensor and receive ultrasonic sensor and be arranged on the inwall of large pipeline both sides, and corresponding two the reception ultrasonic sensors of transmitting ultrasonic sensor; Described ultrasonic drive, driving amplifier are connected by concentric cable according to this with transmitting ultrasonic sensor; The logical small signal amplifier of described reception ultrasonic sensor, band is connected by concentric cable according to this with data acquisition card; Described ultrasonic drive and data acquisition card are integrated in industrial computer.
Further, have protecting sheathing in ultrasonic sensor outer setting, ultrasonic sensor is held in place in the fixed muffle bottom protecting sheathing; Ultrasonic sensor outside surface is glued with thermal resistance.
Further, bottom protecting sheathing, be positioned at around ultrasonic sensor and be provided with multiple sweep gas source aperture.
Further, comprise four transmitting ultrasonic sensors and eight reception ultrasonic sensors, ultrasonic drive sends the ultrasonic signal of four kinds of different frequencies, and four transmitting ultrasonic sensors receive the ultrasonic signal of different frequency respectively.
Compared with prior art, to be of the present utility modelly significantly a little, still can to keep higher measuring accuracy at large space, air-flow velocity lower, be not limited to air-flow velocity, bulk and pressure reduction, measuring accuracy is high, and the response time is short, is easy to digital management; For ultrasonic sensor devises blow device and device for monitoring temperature, measurement result is less by impurity effect in air-flow, further increases measuring accuracy; Adopt four groups of ultrasonic sensors to carry out multimetering, can prevent from interfering with each other, can improve for large space environment the accuracy measured again.
Accompanying drawing explanation
Fig. 1 is that the utility model forms schematic diagram to the device that air-flow velocity is measured in large space.
Fig. 2 is device for monitoring temperature and the blow device schematic diagram of ultrasonic sensor in the utility model.
Fig. 3 is that in the utility model, industrial computer uses time difference method to resolve the principle schematic of gas flow rate.
Embodiment
Easy understand, according to the technical solution of the utility model, when not changing connotation of the present utility model, one of ordinary skill in the art can be imagined and the utility model carries out measurement mechanism in large space numerous embodiments to air-flow velocity.Therefore, following embodiment and accompanying drawing are only the exemplary illustrations to the technical solution of the utility model, and should not be considered as of the present utility model all or the restriction be considered as technical solutions of the utility model or restriction.
Composition graphs 1, this use utility model to the device that air-flow velocity is measured, comprises ultrasonic drive 1, High-Speed Data Acquisition Board 2, industrial computer 3, driving amplifier 4, large pipeline 5, ultrasonic sensor, concentric cable 8, the logical small signal amplifier 9 of band in large space; Wherein, ultrasonic sensor comprises to be launched ultrasonic sensor 6 and receives ultrasonic sensor 7, air-flow flows through from large pipeline 5, launch ultrasonic sensor 6 and receive the both sides that ultrasonic sensor 7 is arranged on large pipeline 5, and corresponding two the reception ultrasonic sensors 7 of transmitting ultrasonic sensor 6, there is certain distance between two reception ultrasonic sensors 7, one of them is positioned at the upstream of the air-flow flowing through large pipeline, and another is positioned at the downstream of air-flow; Receive between ultrasonic sensor 7 with the logical small signal amplifier 9 of band and be connected by concentric cable 8; Band is logical to be connected by data line between small signal amplifier 9 with High-Speed Data Acquisition Board 2; Ultrasonic drive 1 and high-speed collection card 2 are integrated on industrial computer 3.
During work, ultrasonic drive 1 sends the ultrasonic signal of four kinds of different frequencies as source driving signal, and ultrasonic signal is passed to driving amplifier 4; Ultrasonic signal after amplification, for amplifying ultrasonic signal, then passes to and launches ultrasonic sensor 6 by driving amplifier 4; Launch ultrasonic sensor 6 and ultrasonic signal is passed to two the reception ultrasonic sensors 7 corresponding with it; Receive ultrasonic sensor 7 and import the received ultrasonic signal that has into band logical small signal amplifier 9 by concentric cable 8, now, there is certain hour difference between the ultrasonic signal that two corresponding with same transmitting ultrasonic sensor 6 reception ultrasonic sensors 7 receive; The logical small signal amplifier 9 of band amplifies, the signal that reception ultrasonic sensor 7 receives to prevent the aerial decay of ultrasound wave; Ultrasonic signal after amplification passes to high-speed collection card 2, and high-speed collection card 2 for gathering the ultrasonic signal in the logical small signal amplifier 9 of band, and imports industrial computer 3 into; The time difference existed between the ultrasonic signal that industrial computer 3 obtains according to two reception ultrasonic sensors 7 calculates the gas flow rate in large pipeline 5.
Industrial computer 3 have employed the measuring principle of ultrasonic method, calculates gas flow rate according to the mistiming that the ultrasonic signal gathered exists.
Composition graphs 2, ultrasonic sensor is provided with device for monitoring temperature and source of the gas blow device.Wherein,
Have protecting sheathing 10 in ultrasonic sensor outer setting, ultrasonic sensor is held in place in the fixed muffle 12 bottom protecting sheathing 10; Ultrasonic sensor outside surface is glued with thermal resistance 14, thermal resistance 14 is for detecting the temperature variation of ultrasonic sensor, and temperature variation data is passed to outside temperature monitoring module, thus monitoring temperature is carried out to ultrasonic sensor, ensure the normal work of ultrasonic sensor.
Bottom protecting sheathing 10, be positioned at around ultrasonic sensor and be provided with multiple sweep gas source aperture 13; the air-flow produced for making external air source enters protecting sheathing 10 inside and forms sweep gas; thus form protection air film at ultrasonic sensor exterior face, prevent ultrasonic sensor to be corroded or pollute.
The bottom of protecting sheathing 10 is also provided with ultrasonic sensor Signal transmissions hole 15, for passing through concentric cable 8; The bottom of protecting sheathing 10 is also provided with temperature signal transmission hole 16, for by thermal resistance signal transmission cable, by thermal resistance signal transmission cable, temperature signal is transferred to temperature monitoring module.
Said temperature supervising device and source of the gas blow device make ultrasonic sensor not easily by the impact of impurities in airflow, thus improve the measuring accuracy of air-flow velocity.
Composition graphs 3, launching ultrasonic sensor 6 is arranged on the tube wall of large pipeline side that internal diameter is D, upstream receives ultrasonic sensor 7-1 and accepted downstream ultrasonic sensor 7-2 and is arranged on the tube wall of large pipeline opposite side, and the angle launched ultrasonic sensor 6 and accept ultrasonic sensor 7-1 line and tube wall is α; The ultrasound wave that transmitting ultrasonic sensor 6 is launched is that the velocity of propagation of c passes to upstream reception ultrasonic sensor 7-1 and accepted downstream ultrasonic sensor 7-2 with size, because large pipeline gas has flow velocity, upstream receives the ultrasonic signal life period difference Δ T that ultrasonic sensor 7-1 and accepted downstream ultrasonic sensor 7-2 receives, then the gas flow rate V in large pipeline can obtain with following formulae discovery:
When simultaneously with four transmitting ultrasonic sensors 6 launch four kinds of different frequency ultrasonic signals carry out multiple spot test the speed time, first can calculate the flow velocity under four different frequency ultrasonic signals respectively, then get its mean value as the most total measurement result, measuring accuracy interference can be improved further.
Claims (4)
1. in large space to the device that air-flow velocity is measured, it is characterized in that, comprise ultrasonic drive, data acquisition card, industrial computer, driving amplifier, large pipeline, ultrasonic sensor, band lead to small signal amplifier;
Described ultrasonic sensor comprises to be launched ultrasonic sensor and receives ultrasonic sensor, launch ultrasonic sensor and receive ultrasonic sensor and be arranged on the inwall of large pipeline both sides, and corresponding two the reception ultrasonic sensors of transmitting ultrasonic sensor;
Described ultrasonic drive, driving amplifier are connected by concentric cable according to this with transmitting ultrasonic sensor;
The logical small signal amplifier of described reception ultrasonic sensor, band is connected by concentric cable according to this with data acquisition card;
Described ultrasonic drive and data acquisition card are integrated in industrial computer.
2. as claimed in claim 1 in large space to the device that air-flow velocity is measured, it is characterized in that there is protecting sheathing in ultrasonic sensor outer setting, ultrasonic sensor is held in place in the fixed muffle bottom protecting sheathing; Ultrasonic sensor outside surface is glued with thermal resistance.
3. as claimed in claim 2 in large space to the device that air-flow velocity is measured, it is characterized in that, bottom protecting sheathing, be positioned at around ultrasonic sensor and be provided with multiple sweep gas source aperture.
4. as claimed in claim 1 in large space to the device that air-flow velocity is measured, it is characterized in that, comprise four transmitting ultrasonic sensors and eight reception ultrasonic sensors, ultrasonic drive sends the ultrasonic signal of four kinds of different frequencies, and four transmitting ultrasonic sensors receive the ultrasonic signal of different frequency respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520394923.XU CN204679522U (en) | 2015-06-09 | 2015-06-09 | A kind of in large space to the device that air-flow velocity is measured |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520394923.XU CN204679522U (en) | 2015-06-09 | 2015-06-09 | A kind of in large space to the device that air-flow velocity is measured |
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| CN204679522U true CN204679522U (en) | 2015-09-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188017A (en) * | 2018-10-09 | 2019-01-11 | 北京三听科技有限公司 | A kind of wind direction and wind velocity detection device and detection method based on array of ultrasonic sensors |
| CN110346315A (en) * | 2019-08-19 | 2019-10-18 | 大连世有电力科技有限公司 | A kind of flue gas measuring device |
| CN110361561A (en) * | 2018-04-09 | 2019-10-22 | 郑州琼佩电子技术有限公司 | A kind of large diameter pipeline fluid monitoring methods |
-
2015
- 2015-06-09 CN CN201520394923.XU patent/CN204679522U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361561A (en) * | 2018-04-09 | 2019-10-22 | 郑州琼佩电子技术有限公司 | A kind of large diameter pipeline fluid monitoring methods |
| CN109188017A (en) * | 2018-10-09 | 2019-01-11 | 北京三听科技有限公司 | A kind of wind direction and wind velocity detection device and detection method based on array of ultrasonic sensors |
| CN110346315A (en) * | 2019-08-19 | 2019-10-18 | 大连世有电力科技有限公司 | A kind of flue gas measuring device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 210032 Jiangsu Province, Nanjing Jiangbei District Lijing Road No. 2 building A block 4 layer development Patentee after: Nanjing new watt Intelligent Control Technology Co., Ltd. Address before: Lijing Road, Pukou high tech Industrial Development Zone, Nanjing City, Jiangsu province 210000 No. 2 R & D building A block 4 layer Patentee before: Nanjing Zoneng Ruihua Electric Co., Ltd. |