CN104378537A - Defogging method for video camera - Google Patents
Defogging method for video camera Download PDFInfo
- Publication number
- CN104378537A CN104378537A CN201410678258.7A CN201410678258A CN104378537A CN 104378537 A CN104378537 A CN 104378537A CN 201410678258 A CN201410678258 A CN 201410678258A CN 104378537 A CN104378537 A CN 104378537A
- Authority
- CN
- China
- Prior art keywords
- video camera
- light
- defogging method
- heating module
- described optical
- 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.)
- Pending
Links
Abstract
The invention discloses a defogging method for a video camera. A light transmitter and a light receiver are arranged in the video camera, and a heating module and a fan are arranged nearby window glass of the video camera. Light is transmitted to the inner wall of the window glass of the video camera at constant intensity through the light transmitter; the light receiver receives the light reflected by the inner wall of the window glass of the video camera after being transmitted by the light transmitter. A light signal received by the light receiver is converted into an electric signal, and then the electric signal is filtered; afterwards, the intensity of the filtered electric signal is compared with a preset intensity threshold value, and whether the heating module and the fan are controlled to work or not is controlled according to the comparison result. According to the defogging method, whether the window glass of the video camera fogs or not can be judged intelligently, and meanwhile defogging can be performed automatically when the window glass fogs.
Description
Technical field
The present invention relates to monitoring field, particularly relate to a kind of video camera defogging method.
Background technology
Video camera (videocamera) is that optical image signal is changed into the signal of telecommunication, so that a kind of machine storing or transmit.When we take an object, the light that this object reflects camera shots being shot, makes on its sensitive surface focusing on picture pick-up device (target surface of such as camera tube), then by picture pick-up device, light is changed into electric energy, namely obtain " vision signal ".Photosignal is very faint, need be amplified by pre-arcing road, carry out processing and adjusting through various circuit again, the standard signal finally obtained can be delivered on the recording mediums such as video tape recorder and record, or is propagated by broadcasting system or deliver on monitor and show.
As camera, early stage video camera needs to use egative film (i.e. video tape) to note down, but the invention of current digital camera, make image directly be stored in flash memory.The video camera of modern, be then view data be directly stored in the hard disk of fuselage, not only can dynamically make video recording, and also static can take, just can be with digital camera simultaneously.Family video camera fuselage easy to carry is light, and good operation is almost the electrical appliance of family's indispensability.At present, video camera is based on the product of Panasonic, major company of Sony two, and the properties, characteristic etc. of JVC and Canon its product of expansion progressively, towards high-definition digital video future development.
Picture pick-up device divides camera tube and the large class of solid (semiconductor) picture pick-up device two.
Camera tube, electron beam device, be divided into again image dissector, photomultiplier transit image dissector, image-orthicon and vidicon etc. several.The lead oxide iconoscope that in Novel camera, many uses are small and exquisite.Various camera tube has a glass bulb, and target surface and electron gun are equipped with in the inside.Subject images in target surface through the window on glass bulb, utilizes the photoemissive effect of target surface or photoconductive effect that the Illumination Distribution of target surface each point is converted into corresponding Potential distribution, light image is become electrical image.Under pipe extrinsic deflection coil drive, electron beam pointwise is lined by line scan target surface, and the electric potential signal of pixel each on scanning pattern is exported according to the order of sequence.
Solid photographic device is a kind of novel charge coupled device (CCD), and a hundreds of thousands device cell is arranged in front, and top layer has light sensitive characteristic.Subject images in front, and each unit amount of charge stored and illumination are directly proportional.Utilize clock pulse and shift control signal, each for front cell signal is shifted out in certain sequence, the time dependent electric image signal of intensity can be obtained.
When the ambient temperature residing for video camera reduces fast, the sight glass surface temperature that video camera uses also can reduce.The inner damp and hot air of video camera runs into cold sight glass and will haze at inner surface, thus impact monitoring shooting effect.
Existing video camera does not generally have the function of demist, often can only manual demist, leaves a trace and then affect the situation of shooting effect after often there will be wiping.
Patent " camera lens Defrosting structure " (application number: 201220249446.4 applyings date: 2012-05-29) discloses a kind of camera lens Defrosting structure; comprise video camera, guard shield for the protection of video camera; and be arranged on the front frame of one end of guard shield; former frame is provided with clear glass; it is characterized in that: described camera lens is provided with sheath; one end of sheath is enclosed within camera lens, and the other end holds out against on clear glass inner surface.By installing a sheath on camera lens additional, one end of sheath is enclosed within camera lens, the other end holds out against on the clear glass on former frame, the passage of sealing is formed between camera lens and front frame clear glass, thus by front frame clear glass, camera lens just and sheath, between video camera spaced apart come, the temperature of clear glass just with camera lens, clear glass, the temperature that sheath three is formed in seal channel is consistent, steam in such guard shield in air condensation would not form water smoke on clear glass inwall, and affect the normal monitoring function of video camera.
This mode adopts the mode of mechanical attachment means, due to many layer of transparent glass, inherently affects photographic quality, and clear glass itself also easily congeals into water smoke, impact shooting.
Patent " method and apparatus that a kind of video camera demist is antifog " (application number: 201410025700.6 applyings date: 2014-01-20) discloses a kind of specially for the demist anti-fog method of thermal camera, and the antifog method of this demist is by carrying out thermostatic control to realize to thermal camera.When carrying out thermostatically controlled, making full use of the infrared lamp of video camera itself to carry out temperature adjustment, thus without the need to arranging heating module separately again, saving the cost of video camera entirety, and effect in practical application is very good.
Although it is antifog that this mode can realize demist, it needs to use infrared lamp to carry out temperature adjustment always, and energy charge is very large.
Summary of the invention
Technical problem to be solved by this invention is for defect involved in background technology, provides a kind of video camera defogging method.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of video camera defogging method, comprises following steps:
Step 1), arranges optical transmitting set and optical receiver respectively in video camera;
Step 2), heating module and fan are set near video camera sight glass;
Step 3), by described optical transmitting set with the inwall emission of light of constant intensity to video camera sight glass;
Step 4), receives the light reflected through video camera sight glass inwall after described optical transmitting set is launched by described optical receiver;
Step 5), is converted to the signal of telecommunication by the light signal that described optical receiver receives;
Step 6), carries out filtering to the signal of telecommunication after conversion;
Step 7), calculates the intensity of the filtered signal of telecommunication;
Step 8), compares the electrical signal intensity calculated and the intensity threshold preset:
If the electrical signal intensity calculated is more than or equal to default intensity threshold, controls heating module and add air near thermal video camera sight glass, and control fan heating module is heated after air blow to video camera sight glass;
If the electrical signal intensity calculated is less than default intensity threshold, control heating module and fan quit work.
As the further prioritization scheme of a kind of video camera defogging method of the present invention, the light that described optical transmitting set is launched is visible ray.
As the further prioritization scheme of a kind of video camera defogging method of the present invention, the light that described optical transmitting set is launched is infrared ray.
As the further prioritization scheme of a kind of video camera defogging method of the present invention, the light that described optical transmitting set is launched is laser.
As the further prioritization scheme of a kind of video camera defogging method of the present invention, described heating module adopts resistive heater.
As the further prioritization scheme of a kind of video camera defogging method of the present invention, the model of described resistive heater is 0Cr25Al5.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1. structure is simple, easy to use;
2. can intelligence the sight glass judging video camera on whether haze, and can when hazing automatic defrosting.
Embodiment
Below technical scheme of the present invention is described in further detail:
A kind of video camera defogging method, comprises following steps:
Step 1), arranges optical transmitting set and optical receiver respectively in video camera;
Step 2), heating module and fan are set near video camera sight glass;
Step 3), by described optical transmitting set with the inwall emission of light of constant intensity to video camera sight glass;
Step 4), receives the light reflected through video camera sight glass inwall after described optical transmitting set is launched by described optical receiver;
Step 5), is converted to the signal of telecommunication by the light signal that described optical receiver receives;
Step 6), carries out filtering to the signal of telecommunication after conversion;
Step 7), calculates the intensity of the filtered signal of telecommunication;
Step 8), compares the electrical signal intensity calculated and the intensity threshold preset:
Carry out if the electrical signal intensity calculated is more than or equal to default intensity threshold, control heating module and add air near thermal video camera sight glass, and control fan heating module is heated after air blow to video camera sight glass;
Carry out if the electrical signal intensity calculated is less than default intensity threshold, control heating module and fan quit work.
The light that described optical transmitting set is launched can be visible ray, infrared ray or laser.
Described heating module adopts resistive heater, and its model is 0Cr25Al5.
The processor of described control module adopts AVR series monolithic, preferential employing Atmega168PA single-chip microcomputer.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a video camera defogging method, is characterized in that, comprises following steps:
Step 1), arranges optical transmitting set and optical receiver respectively in video camera;
Step 2), heating module and fan are set near video camera sight glass;
Step 3), by described optical transmitting set with the inwall emission of light of constant intensity to video camera sight glass;
Step 4), receives the light reflected through video camera sight glass inwall after described optical transmitting set is launched by described optical receiver;
Step 5), is converted to the signal of telecommunication by the light signal that described optical receiver receives;
Step 6), carries out filtering to the signal of telecommunication after conversion;
Step 7), calculates the intensity of the filtered signal of telecommunication;
Step 8), compares the electrical signal intensity calculated and the intensity threshold preset:
If the electrical signal intensity calculated is more than or equal to default intensity threshold, controls heating module and add air near thermal video camera sight glass, and control fan heating module is heated after air blow to video camera sight glass;
If the electrical signal intensity calculated is less than default intensity threshold, control heating module and fan quit work.
2. video camera defogging method according to claim 1, is characterized in that, the light that described optical transmitting set is launched is visible ray.
3. video camera defogging method according to claim 1, is characterized in that, the light that described optical transmitting set is launched is infrared ray.
4. video camera defogging method according to claim 1, is characterized in that, the light that described optical transmitting set is launched is laser.
5. video camera defogging method according to claim 1, is characterized in that, described heating module adopts resistive heater.
6. video camera defogging method according to claim 5, is characterized in that, the model of described resistive heater is 0Cr25Al5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678258.7A CN104378537A (en) | 2014-11-24 | 2014-11-24 | Defogging method for video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678258.7A CN104378537A (en) | 2014-11-24 | 2014-11-24 | Defogging method for video camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104378537A true CN104378537A (en) | 2015-02-25 |
Family
ID=52557170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410678258.7A Pending CN104378537A (en) | 2014-11-24 | 2014-11-24 | Defogging method for video camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104378537A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487324A (en) * | 2015-12-29 | 2016-04-13 | 黄翔翊 | Apparatus capable of preventing photographic equipment lens from water drop |
| CN106580507A (en) * | 2016-11-29 | 2017-04-26 | 苏州佳世达电通有限公司 | Demisting device, oral cavity scanner, and oral cavity scanning device |
| CN106580508A (en) * | 2016-11-29 | 2017-04-26 | 苏州佳世达电通有限公司 | Anti-fog device and anti-fog method |
| CN107734219A (en) * | 2017-09-29 | 2018-02-23 | 国网上海市电力公司 | A kind of radiant type defogging method for optical lens |
| CN107786790A (en) * | 2016-08-31 | 2018-03-09 | 浙江大华技术股份有限公司 | A kind of windshield decision maker and video camera |
| 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 |
| CN109611791A (en) * | 2019-01-08 | 2019-04-12 | 北京汽车股份有限公司 | Lamps and lanterns demister, lamps and lanterns, vehicle and lamps and lanterns defogging method |
| CN110115542A (en) * | 2019-06-17 | 2019-08-13 | 上海应用技术大学 | A kind of automatic defogging device of window |
| US10928630B2 (en) | 2016-08-31 | 2021-02-23 | Zhejiang Dahua Technology Co., Ltd. | Devices and methods for detecting and removing vapor |
| CN112672006A (en) * | 2020-11-17 | 2021-04-16 | 钟能俊 | Automatic deicing system of camera |
| US11497587B2 (en) * | 2018-02-13 | 2022-11-15 | Qisda Corporation | Oral scanner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004145107A (en) * | 2002-10-25 | 2004-05-20 | Fuji Photo Film Co Ltd | Defogger system |
| CN102789115A (en) * | 2012-08-23 | 2012-11-21 | 浙江宇视科技有限公司 | Defogging system of camera |
| CN203072060U (en) * | 2012-12-15 | 2013-07-17 | 广东长虹电子有限公司 | Television set capable of detecting humidity automatically and dehumidifying intelligently |
| CN203181261U (en) * | 2013-03-23 | 2013-09-04 | 北京兴科迪科技有限公司 | Automatic vehicle window demister and vehicle equipped with demister |
-
2014
- 2014-11-24 CN CN201410678258.7A patent/CN104378537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004145107A (en) * | 2002-10-25 | 2004-05-20 | Fuji Photo Film Co Ltd | Defogger system |
| CN102789115A (en) * | 2012-08-23 | 2012-11-21 | 浙江宇视科技有限公司 | Defogging system of camera |
| CN203072060U (en) * | 2012-12-15 | 2013-07-17 | 广东长虹电子有限公司 | Television set capable of detecting humidity automatically and dehumidifying intelligently |
| CN203181261U (en) * | 2013-03-23 | 2013-09-04 | 北京兴科迪科技有限公司 | Automatic vehicle window demister and vehicle equipped with demister |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487324A (en) * | 2015-12-29 | 2016-04-13 | 黄翔翊 | Apparatus capable of preventing photographic equipment lens from water drop |
| CN107786790A (en) * | 2016-08-31 | 2018-03-09 | 浙江大华技术股份有限公司 | A kind of windshield decision maker and video camera |
| US10928630B2 (en) | 2016-08-31 | 2021-02-23 | Zhejiang Dahua Technology Co., Ltd. | Devices and methods for detecting and removing vapor |
| US11709357B2 (en) | 2016-08-31 | 2023-07-25 | Zhejiang Dahua Technology Co., Ltd. | Devices and methods for detecting and removing vapor |
| CN106580507A (en) * | 2016-11-29 | 2017-04-26 | 苏州佳世达电通有限公司 | Demisting device, oral cavity scanner, and oral cavity scanning device |
| CN106580508A (en) * | 2016-11-29 | 2017-04-26 | 苏州佳世达电通有限公司 | Anti-fog device and anti-fog method |
| 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 |
| CN107734219A (en) * | 2017-09-29 | 2018-02-23 | 国网上海市电力公司 | A kind of radiant type defogging method for optical lens |
| US11497587B2 (en) * | 2018-02-13 | 2022-11-15 | Qisda Corporation | Oral scanner |
| CN109611791A (en) * | 2019-01-08 | 2019-04-12 | 北京汽车股份有限公司 | Lamps and lanterns demister, lamps and lanterns, vehicle and lamps and lanterns defogging method |
| CN110115542A (en) * | 2019-06-17 | 2019-08-13 | 上海应用技术大学 | A kind of automatic defogging device of window |
| CN112672006A (en) * | 2020-11-17 | 2021-04-16 | 钟能俊 | Automatic deicing system of camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104378537A (en) | Defogging method for video camera | |
| CN104391419A (en) | Defogging system for camera | |
| KR101656173B1 (en) | Method and apparatus for detecting faulty pixel in thermal camera | |
| CN102141260B (en) | Internal recycle radiating type nonradiative microwave oven | |
| JP4331106B2 (en) | Image enhancement camera | |
| CN101435601B (en) | Non-radiation microwave oven | |
| BRPI1007853B1 (en) | bifocal lens dual field of view optical imaging system | |
| CN102854725A (en) | Projection device | |
| CN101459759A (en) | Set-top box having projection function and method for implementing projection | |
| CN102368809B (en) | Exposure compensation device, method and infrared camera | |
| CN101377605B (en) | Monitoring camera device | |
| CN103162843A (en) | Zero shutter thermal infrared imager based on voice operated exchange (VOX) detector and use method thereof | |
| CN105301870B (en) | A kind of human gingival fibroblasts illuminate night vision system | |
| CN111028187B (en) | Light-adaptive airborne double-light image reconnaissance device and method | |
| CN105928627A (en) | Method for eliminating image reproduction non-uniformity of refrigeration type thermal imager | |
| CN103051886A (en) | Active laser night vision instrument | |
| US7423684B2 (en) | Image pickup apparatus and image pickup system | |
| EP0364578B1 (en) | Inspection apparatus for hot furnace | |
| CN109974861B (en) | Scene self-adaption based non-uniform correction method for infrared photoelectric sensor | |
| CN104394327A (en) | Intelligent light supplementing system based on pixel point control | |
| CN102914803B (en) | A kind of formation method and device | |
| CN210694085U (en) | Binocular living body backlight type camera | |
| CN206490751U (en) | The thermal imaging night vision device that laser designation point and indicating cursor are overlapped | |
| KR20060104566A (en) | Cctv camera for day and night with ir injection method | |
| TWI832568B (en) | Fog determination method, and optical apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150225 |