CN102789115A - Defogging system of camera - Google Patents
Defogging system of camera Download PDFInfo
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- CN102789115A CN102789115A CN2012103024066A CN201210302406A CN102789115A CN 102789115 A CN102789115 A CN 102789115A CN 2012103024066 A CN2012103024066 A CN 2012103024066A CN 201210302406 A CN201210302406 A CN 201210302406A CN 102789115 A CN102789115 A CN 102789115A
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Abstract
The invention discloses a defogging system of a camera. The defogging system is characterized by comprising a control device, a temperature and humidity sensor, a heating module and a fan, wherein the temperature and humidity sensor senses the temperature and humidity in the camera; the control device is used for acquiring temperature T0 and humidity R0 sensed by the temperature and humidity sensor, and calculating dew-point temperature T1 according to the temperature T0 and the humidity R0; the control device is used for calculating surface temperature T2 of window glass according to the temperature T0, T2=T0-delta T, wherein delta T is a constant temperature difference value obtained through heat test; when the T2 is less than T1, the heating module and the fan are controlled to start to work by the control device; and when the T2 is greater than the T1, the heating module and the fan are controlled not to start to work the control device. With the adoption of the defogging system of the camera disclosed by the invention, the camera can be automatically defogged; and the the defogging system of the camera is convenient to control and good in defogging effect.
Description
Technical field
The present invention relates to the video camera in the field of monitoring, relate in particular to a kind of video camera demister system.
Background technology
When the residing environment temperature of video camera reduced fast, ball cover or sight glass surface temperature that video camera uses also can reduce.The inner damp and hot air of video camera runs into cold ball cover or sight glass will haze at inside surface, thus influence monitoring shooting effect.A kind of way that addresses the above problem is for vacuumizing antifog method.With reference to figure 1, video camera comprises: housing 1, right glass 2, left glass 3, left pressing plate 4, right pressing plate 5, vacuumize aperture 6.Between layer glass, just form a vacuum heat-insulating layer 7 like this, thereby prevent that form from hazing.But, the evacuation process more complicated, used of a specified duration after the air-tightness variation of whole device, thereby the anti-fog effect of influence.In addition, use double glazing, the image taking effect also can variation.
The another kind of solution of prior art is at the indium tin oxide target of sight glass surface plating conduction or on sight glass, increases resistive heater.After finding that form hazes, open control through manual auxiliary switch sight glass is heated, thereby carry out demist.This defogging method needs manually control heating, and heats and cause sight glass to break under the inhomogeneous situation easily.In addition, the indium tin oxide target of plating conduction can influence shooting effect on sight glass.
Summary of the invention
The present invention provides a kind of video camera demister system, and this demister system comprises: control device, Temperature Humidity Sensor, heating module, fan, the temperature and humidity in this Temperature Humidity Sensor induction video camera; This control device is used for regularly obtaining the temperature T 0 and humidity R0 that Temperature Humidity Sensor is sensed, and calculates dewpoint temperature T1 according to said temperature T 0 with humidity R0; According to the surface temperature T2 of said temperature T 0 calculating ball cover or sight glass, wherein T2=T0-Δ T, the wherein fixedly temperature approach of Δ T for presetting; < during T1, this control device is controlled heating module and fan unlatching work as T2; As T2>during T1, this control device cuts out heating module and fan.
Preferably, this demister system also comprises: wind scooper, this wind scooper are used for hot-air lead ball cover or sight glass.
Preferably, this heating module is heating resistor or silicon rubber heating film.
Preferably, this heating module is arranged on the fan outlet place.
Preferably, this control device carries out intellectual analysis to the image of taking, if the result of intellectual analysis hazes for ball cover or sight glass, then controls heating module and fan unlatching work; If the result of intellectual analysis closes heating module and fan for ball cover or sight glass do not haze.
The present invention can carry out the demist of video camera automatically, and control is convenient, and demist is effective.
Description of drawings
Fig. 1 is a kind of anti-smog device of prior art.
Fig. 2 is the synoptic diagram as a result of a kind of spherical camera of the present invention.
Fig. 3 is the steering logic figure of a kind of demister system of the present invention.
Embodiment
Specify the embodiment of the invention below in conjunction with accompanying drawing.
Fig. 2 is a kind of spherical camera structural representation shown in the present embodiment.This spherical camera comprises: housing 21, ball cover 22, movement 23, control device 27, Temperature Humidity Sensor 28, heating module 25 and fan 24.Said ball cover 22 is a translucent cover, and the camera lens of movement is when photographic images, if ball cover has mist very big influence to be arranged to image definition.Further referring to Fig. 3, Fig. 3 is a kind of steering logic figure of demister system.This demister system comprises: control device 27, Temperature Humidity Sensor 28, heating module 25 and fan 24.Temperature and humidity in this Temperature Humidity Sensor induction video camera.The Temperature Humidity Sensor here can be humiture one body sensor, can also be temperature sensor and the individual temperature sensors of humidity and the combination of independent humidity sensor respectively.Control device obtains the temperature T 0 and humidity R0 that Temperature Humidity Sensor is sensed through the intercommunication interface, and in preferred mode, the CPU of control device can regularly read the temperature T 0 and humidity R0 in the current video camera of storing in the Temperature Humidity Sensor.Control device calculates dewpoint temperature T1 according to temperature T that obtains 0 and humidity R0.Dewpoint temperature refers to air under moisture content and all immovable condition of air pressure, is cooled to the temperature when saturated.How to calculate dewpoint temperature and belong to prior art, repeat no more according to temperature and humidity.Because the Temperature Humidity Sensor operated by rotary motion is on the inner circuit board of video camera, so its temperature of sensing is the video camera temperature inside, and carry out ball cover haze judge in, the temperature value on ball cover surface is only the basis of more accurate judgement.So control device can calculate the temperature T 2 on ball cover surface further according to the temperature T 0 of sensor sensing.In preferred embodiment, the present invention adopts a kind of comparatively simple way to come to calculate T2 according to T0: carry out the heat test in advance and confirm the temperature difference Δ T between T0 and the T2.As the result of heat test, it is reliably that Δ T is used to calculate T2, i.e. T2=T0-Δ T.Control device is judged dewpoint temperature and ball cover surface temperature < during T1, control device is controlled heating module and fan unlatching work as T2; As T2>during T1, control device control heating module and fan are not opened work.In case T2 < T1, just explanation has been hazed or promptly will have been hazed, if T2>T1 explains that the condition that hazes does not also possess.If hazed or promptly will haze, heating module (can be heating resistor or silicon rubber heating film) and fan need commence work without delay.Heating module generally is positioned at the air outlet of fan, in case heating module begins heating, and the starting fan blowing, heated air circulates in the air channel, so just can avoid hazing and perhaps fog removed.In order the hot-air ball cover that leads to be provided with a wind scooper in the video camera, the flow direction of guiding hot-air.In next moment, the temperature and humidity of the Temperature Humidity Sensor induction that control device obtains is respectively T0 ' and R0 ', and the dewpoint temperature that recomputates is T1 ', and the ball cover surface temperature that recomputates is T2 '.If this moment T2 ' T1 ', heating module of having opened and fan need be closed.
There are a lot of video cameras to possess the function of intellectual analysis now; Such as carrying out mobile detection, recognition of face etc.; So the present invention can also further utilize the intellectual analysis function of video camera; Image to taking carries out intellectual analysis, if judge that ball cover hazes, and control device control heating module and fan unlatching work.
Above embodiment is that example describes with the spherical camera, and demister system of the present invention can use at various needs and carry out on the video camera of demist.These video cameras possibly not have ball cover, such as before the camera lens of video camera, one sight glass etc. are set.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (5)
1. a video camera demister system is characterized in that, this demister system comprises: control device, Temperature Humidity Sensor, heating module, fan, the temperature and humidity in this Temperature Humidity Sensor induction video camera; This control device is used for regularly obtaining the temperature T 0 and humidity R0 that Temperature Humidity Sensor is sensed, and calculates dewpoint temperature T1 according to said temperature T 0 with humidity R0; According to the surface temperature T2 of said temperature T 0 calculating ball cover or sight glass, wherein T2=T0-Δ T, the wherein fixedly temperature approach of Δ T for presetting; < during T1, this control device is controlled heating module and fan unlatching work as T2; As T2>during T1, this control device cuts out heating module and fan.
2. demister system as claimed in claim 1 is characterized in that, said system also comprises: wind scooper, this wind scooper are used for hot-air lead ball cover or sight glass.
3. demister system as claimed in claim 1 is characterized in that, said heating module is heating resistor or silicon rubber heating film.
4. demister system as claimed in claim 1 is characterized in that this heating module is arranged on the fan outlet place.
5. demister system as claimed in claim 1 is characterized in that, said control device carries out intellectual analysis to the image of taking, if the result of intellectual analysis hazes for ball cover or sight glass, then controls heating module and fan unlatching work; If the result of intellectual analysis closes heating module and fan for ball cover or sight glass do not haze.
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| CN201210302406.6A CN102789115B (en) | 2012-08-23 | 2012-08-23 | A kind of video camera demister system |
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| CN201210302406.6A CN102789115B (en) | 2012-08-23 | 2012-08-23 | A kind of video camera demister system |
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| CN103051835A (en) * | 2012-12-11 | 2013-04-17 | 天津天地伟业数码科技有限公司 | HD (High Definition) speed dome camera of demisting network |
| CN103488031A (en) * | 2013-08-29 | 2014-01-01 | 中国科学院长春光学精密机械与物理研究所 | Aviation camera subsection split mounting type optical window defrosting and demisting device |
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| CN104378537A (en) * | 2014-11-24 | 2015-02-25 | 苏州立瓷电子技术有限公司 | Defogging method for video camera |
| CN104391419A (en) * | 2014-11-24 | 2015-03-04 | 苏州立瓷电子技术有限公司 | Defogging system for camera |
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| CN104618630A (en) * | 2014-12-25 | 2015-05-13 | 贵州黔程天力智能科技有限公司 | Camera with defogging function |
| CN105323446A (en) * | 2015-10-20 | 2016-02-10 | 常州市武进华瑞电子有限公司 | Monitoring probe provided with lens capable of defogging through hot blast |
| CN105318902A (en) * | 2015-12-11 | 2016-02-10 | 苏州佳像视讯科技有限公司 | CCD (charge coupled device) shell |
| CN106514672A (en) * | 2016-12-28 | 2017-03-22 | 国网浙江省电力公司湖州供电公司 | Transformer substation inspection robot |
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| CN106657716A (en) * | 2016-12-29 | 2017-05-10 | 惠州华阳通用电子有限公司 | Field of view clearing method and device for electronic in-car rearview mirror |
| CN107105923A (en) * | 2014-12-01 | 2017-08-29 | Qbo咖啡有限责任公司 | Brew module, capsule identification module and beverage preparation machine |
| CN107333045A (en) * | 2017-08-09 | 2017-11-07 | 重庆万建电子工程有限责任公司重庆第分公司 | A kind of Anti-fogging camera |
| CN107360351A (en) * | 2017-07-06 | 2017-11-17 | 中磊电子（苏州）有限公司 | Network monitoring apparatus and its defogging method |
| CN107399321A (en) * | 2016-05-12 | 2017-11-28 | 本田技研工业株式会社 | Vehicle control system, control method for vehicle and wagon control program |
| CN107526235A (en) * | 2016-06-20 | 2017-12-29 | 杭州海康威视数字技术股份有限公司 | A kind of method, apparatus for preventing camera lens protecgulum from hazing and video camera |
| CN107856642A (en) * | 2017-01-24 | 2018-03-30 | 问众智能信息科技（北京）有限公司 | A kind of automobile assistant driving system camera demister |
| CN108076274A (en) * | 2017-12-28 | 2018-05-25 | 浙江大华技术股份有限公司 | A kind of video camera anti-ice-snow deposition or defogging method and a kind of video camera |
| CN108122486A (en) * | 2017-12-31 | 2018-06-05 | 郑州航空工业管理学院 | The anti-condensation method of transparent display |
| CN108270947A (en) * | 2016-12-30 | 2018-07-10 | 深圳市赛菲姆科技有限公司 | A kind of method and apparatus that video camera demisting is controlled by image recognition algorithm |
| CN108366686A (en) * | 2015-12-01 | 2018-08-03 | Qbo咖啡有限责任公司 | Brew module, capsule identification module and beverage preparation machine |
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| CN103488031B (en) * | 2013-08-29 | 2016-12-07 | 中国科学院长春光学精密机械与物理研究所 | Aviation camera subsection split mounting type optical window defrosting and demisting device |
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| CN107360351A (en) * | 2017-07-06 | 2017-11-17 | 中磊电子（苏州）有限公司 | Network monitoring apparatus and its defogging method |
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| CN108122486A (en) * | 2017-12-31 | 2018-06-05 | 郑州航空工业管理学院 | The anti-condensation method of transparent display |
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