CN2529245Y - Laser sensor for investigating dewfall and frosting - Google Patents
Laser sensor for investigating dewfall and frosting Download PDFInfo
- Publication number
- CN2529245Y CN2529245Y CN 02207264 CN02207264U CN2529245Y CN 2529245 Y CN2529245 Y CN 2529245Y CN 02207264 CN02207264 CN 02207264 CN 02207264 U CN02207264 U CN 02207264U CN 2529245 Y CN2529245 Y CN 2529245Y
- Authority
- CN
- China
- Prior art keywords
- dewfall
- frosting
- tunnel hole
- grating
- hole grating
- 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.)
- Expired - Fee Related
Links
- 239000003507 refrigerant Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000002826 coolant Substances 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000001816 cooling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a laser sensor for investigating dewfall and frosting, comprising a continuous pulse laser apparatus, a temperature sensor, a positive circle tunnel hole grating, a thermoelectric cooler, a coolant evaporator, a camera and a coolant recycling tube. When the thermoelectric cooler cools the positive circle tunnel hole grating, the air in the positive circle tunnel hole grating frosts or forms dews to interfere the light transmitted by the pulse laser apparatus, thus the images recorded by the camera change, and the temperature acquired at the right moment is the temperature of dewfall or frosting. For the refraction index of the frost differs from that of the dew, the camera takes different images of dewfall or frosting and outputs different curve coefficients in order to distinguish the dewfall and the frosting.
Description
The utility model relates to a kind of frost and dew point detection device, particularly laser frost and dew point sensor.
Existing dew point transducer has the condenser type of employing, resistance-type, the water cut that adopts in the direct reflection method detected gas is also arranged, preceding two kinds all exist defectives such as datum drift, measurement range is little, though the reflection type mirror sensing range is big, measuring accuracy is also higher, since specular reflectance be differentiate minute surface whether dewfall key parameter, minute surface also can be influenced specular reflectance by the contaminating impurity in the gas in actual applications, thereby influence accuracy of detection, it is the most outstanding defective of reflection type mirror dew point detection technique that minute surface pollutes.It still is that dewfall has certain limitation in actual engineering is answered that existing reflection type mirror dew point detection technique can not be differentiated frosting.
Even the new property of this practicality is will provide the good minute surface of the big baseline stability of a kind of measurement range to pollute to have impurity also can not influence testing result, and can distinguish the sensor that frosting still is a dewfall.
This use is novel to be such realization; When the light of continuous pulse laser emission is received by gamma camera by positive circular tunnel formula hole grating, gamma camera receives is that just round hot spot resembles, positive circular tunnel formula hole grating condense the light that reveals or have a white continuous pulse laser emission by the time, dew or frost refraction index differently change with resembling of taking the photograph of gas gamma camera, different the resembling the different voltage curve of output, utilize in the different distinguishable positive circular tunnel of the voltage curve parameter hole gratings that gamma camera is taken the photograph is that air or water reveal or white.According to water vapor dewfall characteristic; Airborne water vapor pressure generally all will hang down with the Saturated water vapor pressure under this temperature under certain temperature, keep under the constant situation of pressure, air is lowered the temperature, in case Saturated water vapor pressure drops to when identical with original airborne water vapor pressure, the airborne water vapor that is in temperature-fall period must reach capacity and dewfall at this moment, at this moment dewpoint temperature is measured, just might skip warm area that condensate water reveals and frosting if cooling rate is too fast.Apply cooling energy for positive circular tunnel hole grating and make it to be cooled, the air in the grating of positive circular tunnel hole just might drop to a certain warm area dewfall or frosting, when mounting temperature sensor can obtain frosting in positive circular tunnel sky grating or the temperature during dewfall.Below in conjunction with the further detail explanation of accompanying drawing;
Accompanying drawing (1) is originally to be the utility model system diagram;
Accompanying drawing (2) is the positive circular tunnel of the utility model hole optical grating construction figure;
Positive in conjunction with the accompanying drawings circular tunnel hole grating (3) is connected with the cold junction of thermoelectric cooling module (4), the hot junction of thermoelectric cooling module (4) is connected with refrigerant evaporator (5), continuous pulse laser (1) is installed in the left side of positive circular tunnel hole grating (3), optical axis is coaxial with the positive circular tunnel hole of positive circular tunnel hole grating (3), gamma camera (6) is installed on the right side of positive circular tunnel hole grating (3), the light target of gamma camera (6) and pulsed laser optical axis are in opposite directions, the refrigerant circulation pipe (7) that is connected with refrigerant evaporator (5) input refrigerant circulation time positive circular tunnel hole grating (3) is cooled, and the temperature sensor (2) that is installed in positive circular tunnel hole grating (3) when being cooled to water vapor frosting in positive circular tunnel hole grating (3) hole, tunnel or dewfall writes down this temperature dew point or frost point.Frost point, dew point form during according to frosting or dewfall and different resemble, the different curve of gamma camera output is added on differentiation.
Claims (1)
1, a kind of laser frost and dew point sensor of being made up of continuous pulse laser (1), temperature sensor (2), positive circular tunnel hole grating (3), thermoelectric refrigerating unit (4), refrigerant evaporator (5), gamma camera (6), refrigerant circulation pipe (7) is characterized in that; The optical axis of continuous pulse laser (1) is installed with optical axis with the hole, tunnel of positive circular tunnel hole grating (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02207264 CN2529245Y (en) | 2002-03-06 | 2002-03-06 | Laser sensor for investigating dewfall and frosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02207264 CN2529245Y (en) | 2002-03-06 | 2002-03-06 | Laser sensor for investigating dewfall and frosting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2529245Y true CN2529245Y (en) | 2003-01-01 |
Family
ID=33688311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02207264 Expired - Fee Related CN2529245Y (en) | 2002-03-06 | 2002-03-06 | Laser sensor for investigating dewfall and frosting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2529245Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969191A (en) * | 2014-05-20 | 2014-08-06 | 上海理工大学 | Device and method for testing dew formation of air supplying outlet |
| CN104035140A (en) * | 2014-06-10 | 2014-09-10 | 上海理工大学 | Air-conditioner air supply outlet moisture condensation detecting device and method |
| CN109001160A (en) * | 2018-07-13 | 2018-12-14 | 武汉嘉仪通科技有限公司 | A kind of thin-film material phase-change temp measurer and method |
| CN110500751A (en) * | 2019-08-23 | 2019-11-26 | 珠海格力电器股份有限公司 | deicing device, deicing method and air conditioner |
| CN110869711A (en) * | 2017-07-14 | 2020-03-06 | 株式会社尼康 | Encoder and driving device |
-
2002
- 2002-03-06 CN CN 02207264 patent/CN2529245Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969191A (en) * | 2014-05-20 | 2014-08-06 | 上海理工大学 | Device and method for testing dew formation of air supplying outlet |
| CN104035140A (en) * | 2014-06-10 | 2014-09-10 | 上海理工大学 | Air-conditioner air supply outlet moisture condensation detecting device and method |
| CN104035140B (en) * | 2014-06-10 | 2017-01-11 | 上海理工大学 | Air-conditioner air supply outlet moisture condensation detecting method |
| CN110869711A (en) * | 2017-07-14 | 2020-03-06 | 株式会社尼康 | Encoder and driving device |
| CN109001160A (en) * | 2018-07-13 | 2018-12-14 | 武汉嘉仪通科技有限公司 | A kind of thin-film material phase-change temp measurer and method |
| CN109001160B (en) * | 2018-07-13 | 2021-03-05 | 武汉嘉仪通科技有限公司 | Device and method for measuring phase change temperature of thin film material |
| CN110500751A (en) * | 2019-08-23 | 2019-11-26 | 珠海格力电器股份有限公司 | deicing device, deicing method and air conditioner |
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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 |