CN102065215B - Infrared night vision system and control method thereof - Google Patents
Infrared night vision system and control method thereof Download PDFInfo
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- CN102065215B CN102065215B CN201010202490.5A CN201010202490A CN102065215B CN 102065215 B CN102065215 B CN 102065215B CN 201010202490 A CN201010202490 A CN 201010202490A CN 102065215 B CN102065215 B CN 102065215B
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Abstract
The invention relates to an infrared night vision system and a control method thereof, belongs to the technical field of infrared night vision, and aims to solve the problems that objects cannot be clearly seen due to a pitch-black frame caused by a flashlight effect, and brightness is nonuniform. A communication unit is used for sending a received control signal to a main control unit; an infrared array lamp group control unit is used for controlling the lens angle or current of an infrared array lamp group according to a control command of the main control unit; a camera control unit is used for controlling the lens position or visual angle of a camera according to a control command of the main control unit, and sending visual angle information of the camera to the main control unit; and the main control unit is used for sending the control command to the infrared array lamp group through the infrared array lamp group control unit and sending the control command to the camera through the camera control unit according to the control signal of the communication unit, and controlling the lens angle or current of the infrared array lamp group through the infrared array lamp group control unit according to the visual angle information sent by the camera control unit.
Description
Technical field
The present invention relates to a kind of infrared night-vision system and to the control method of infrared night-vision system, belong to the infrared night vision technical field.
Background technology
At present can realize that in protection and monitor field the ball machine of night vision or The Cloud Terrace have generally adopted the technology such as common infrared LED lamp, laser infrared night vision, infrared thermal imaging and infrared array lamp (LED ARRAY).
Common infrared LED lamp has the characteristics of low cost of manufacture, but the infrared radiation near distance generally only have 0 to 30 meter, and the life-span is shorter, and normal operation just has the infrared lamp that does not work to occur after half a year.The laser infrared light fixture has the characteristics of directivity, monochromaticjty, so that the living factory technique of laser infrared lamp is more complicated than common infrared LED lamp, production technology and the accumulation of for many years strength that need to have semiconductor laser just can be finished making of excellent product, the research and development of laser infrared lamp and need of production drop into huge fund simultaneously, also are that general producer can not finish.Infrared thermal imaging is to utilize the difference of nature object different parts infrared intensity to form image, and picture contrast is lower, and it is relatively poor to differentiate the details ability, has larger limitation.
Existing infrared array lamp generally adopts LED Array technology, and the electric light transfer ratio is higher, with respect to other infrared night vision product, the characteristics such as has a life-span length, imaging clearly, manufacturing cost is lower.But it is can picture pitch-dark that present existing infrared array lamp causes because of the torch effect in the distance that surpasses 20 meters, causes not seeing object, and 20 meters then a bright circle can occur with interior distance in the middle of picture, cause brightness irregularities.
Summary of the invention
Cause at the distance meeting picture that surpasses 20 meters pitch-dark for what solution existed in existing infrared array lamp technology because of the torch effect, cause not seeing object, 20 meters then a bright circle can occur in the middle of the picture with interior distance, the problem that causes brightness irregularities has proposed a kind of infrared night-vision system and to the control method of infrared night-vision system.
This system comprises: communication unit, infrared array controlling on lamp group unit, camera control unit and main control unit, and the control signal that communication unit is used for receiving sends to main control unit; The control command that infrared array controlling on lamp group unit is used for sending according to main control unit is controlled lens angle or the size of current of infrared array lamp group; The control command that camera control unit is used for sending according to main control unit is controlled lens location or the visual angle size of video camera, and the visual angle information of video camera is sent to main control unit; Main control unit is used for the control signal according to the communication unit transmission, send control command by infrared array controlling on lamp group unit to infrared array lamp group, and send control command by camera control unit to video camera, and cross lens angle or the size of current of infrared array controlling on lamp group unit controls infrared array lamp group according to the visual angle information exchange that camera control unit sends.
The method comprises:
Step 1 reads the lens location value of video camera;
The present invention is according to lens angle and the brightness of the corresponding infrared array lamp of lens location information acquisition of video camera, realized the perfect cooperation of video camera and infrared array lamp, avoided photoelectricity cylinder effect, the object of 0～100 meter scope can clearly be photographed, and have uniform brightness.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the infrared night-vision system that provides of the specific embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the control method of the infrared night-vision system that provides of the specific embodiment of the present invention.
Embodiment
The specific embodiment of the present invention has proposed a kind of infrared night-vision system, as shown in Figure 1, specifically can comprise communication unit 1, infrared array controlling on lamp group unit 2, camera control unit 3 and main control unit 4.Communication unit 1, the control signal that is used for receiving sends to main control unit 4; Infrared array controlling on lamp group unit 2 is used for lens angle or size of current according to the control command control infrared array lamp group 5 of main control unit 4 transmissions; Camera control unit 3 is used for lens location or visual angle size according to the control command control video camera 6 of main control unit 4 transmissions, and the visual angle information of video camera 6 is sent to main control unit 4; Main control unit 4, be used for the control signal according to communication unit 1 transmission, send control command by infrared array controlling on lamp group unit 2 to infrared array lamp group 5, and pass through camera control unit 3 to video camera 6 transmission control commands, and cross lens angle or the size of current of infrared array controlling on lamp group unit 2 control infrared array lamp groups 5 according to the visual angle information exchange that camera control unit 3 sends.
The below describes this embodiment as an example of common infrared ball machine example, the control signal of infrared ball machine outside sends to main control unit 4 by communication unit 1, communication unit 1 can adopt the RS485 bus, and carries out communication with puppy parc (for example PELCO-D/P) and main control unit 4.Main control unit 4 can adopt NS Semiconductor LM3404 cake core, and according to the control signal that communication unit 1 sends, controls by infrared array controlling on lamp group unit 2 pairs of infrared array lamps group 5.
Infrared array lamp group 5 can adopt by three groups of infrared array lamp 5-1 and form, and the lens angle of three groups of infrared array lamp 5-1 is respectively 45 °, 15 ° and 8 °.In order to obtain better display effect, three groups of infrared array lamp 5-1 can be by three independent control switchs of infrared array lamp control unit in the infrared array controlling on lamp group unit 2, and power is adjustable, the power of every group of infrared array lamp 5-1 is determined that by input current the size of input current is by main control unit 4 controls.The lens angle that the control of infrared array lamp 5-1 mainly is based on array lamp is less, and the infrared light emission distance is far away, but can stay photoelectricity cylinder effect in monitor central authorities closely the time; The array lamp electric current is directly proportional with luminosity, and electric current is larger, the principle that brightness is stronger.Based on above-mentioned principle, should brightness even for the infrared array lamp 5-1 in 0～100 meter scope irradiation, again apart from problem enough far away, the lens location that can obtain according to camera control unit 3 and visual angle size be to the opening and closing of every group of infrared lamp, and the input current size is accurately controlled and realized best night vision effect.
The specific embodiment of the present invention also provides a kind of control method of infrared night-vision system, as shown in Figure 2, specifically can comprise the steps:
Step 1 reads the lens location value of video camera;
Step 41, as the visual angle of video camera value ω during greater than 35 °, it is 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that the infrared array lamp of 15 ° and 8 ° is closed;
Step 42, when the visual angle of video camera value ω was 15 °～35 °, it was 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that 15 ° the unlatching power of infrared array lamp is by formula W
1=W * [100-(ω-15) * 4] % determines, the power when wherein W is full power unlatching infrared array lamp, W
1For opening power, the lens angle is that 8 ° infrared array lamp is closed;
Step 43, when the visual angle of video camera value ω was 8 °～15 °, full power was opened the infrared array lamp that the lens angle is 45 ° and 15 °, and the lens angle is that 8 ° the unlatching power of infrared array lamp is by formula W
2=W * [100-(ω-8) * 11] % determines, the power when wherein W is full power unlatching infrared array lamp, W
2For opening power;
Step 44, as the visual angle of video camera value ω during less than 8 °, full power is opened the infrared array lamp that the lens angle is 45 °, 15 ° and 8 °.
When being applied in this method in a kind of infrared night-vision system that provides in the above-mentioned embodiment, specifically by main control unit 4 control method by infrared array controlling on lamp group unit 2 control infrared array lamp 5-1 mainly based on following principle:
1., the relation at the lens location of video camera 6 and visual angle
The camera lens of video camera 6 its visual angle when amplification is dwindled changes, and the camera lens of video camera 6 is condensed to that hour its visual angle is for maximum, and its visual angle is for minimum when being amplified to maximum.
2., the lens angle of infrared array lamp 5-1 and the distance relation of irradiation
Larger its irradiation distance of the lens angle of infrared array lamp 5-1 is nearer, and the lens angle more hour distance of irradiation is far away.
3., the relation of the electric current of infrared array lamp 5-1 and brightness
Larger its brighter display of the electric current of infrared array lamp 5-1, electric current more hour its brightness are darker.
4., infrared array lamp 5-1 electric current is adjustable
Because the camera lens of video camera 6 its angular field of view when the zoom changes very greatly, by 40 °～55 ° of maximum to minimum below 5 °, take the SONY480 video camera as example, its angular field of view is 2.8 °～48 °, according to this situation three groups of infrared array lamp 5-1 can be set, its perspective angle is for being respectively 45 °, 15 ° and 8 °, and the electric current of every group of infrared array lamp 5-1 all can be controlled separately.
The visual angle value ω of video camera 6 and the current relationship of three groups of infrared array lamps 5 are as follows: when the visual angle of video camera 6 is worth ω greater than 35 °, it is 45 ° infrared array lamp 5-1 that full power is opened the lens angle, and the lens angle is that the infrared array lamp 5-1 of 15 ° and 8 ° closes; When the visual angle of video camera 6 value ω was 15 °～35 °, it was 45 ° infrared array lamp 5-1 that full power is opened the lens angle, and the lens angle is that 15 ° the unlatching power of infrared array lamp 5-1 is by formula W
1=W * [100-(ω-15) * 4] %, the power when wherein W is full power unlatching infrared array lamp 5-1, W
1For opening power, the lens angle is that 8 ° infrared array lamp 5-1 closes; When the visual angle of video camera 6 value ω was 8 °～15 °, full power was opened the infrared array lamp 5-1 that the lens angle is 45 ° and 15 °, and the lens angle is that 8 ° the unlatching power of infrared array lamp 5-1 is by formula W
2=W * [100-(ω-8) * 11] %, the power when wherein W is full power unlatching infrared array lamp 5-1, W
2For opening power; As the visual angle of video camera 6 value ω during less than 8 °, full power is opened the infrared array lamp 5-1 that the lens angle is 45 °, 15 ° and 8 °.
This embodiment is according to lens angle and the brightness of the corresponding infrared array lamp of lens location information acquisition of video camera, realized the perfect cooperation of video camera and infrared array lamp, avoided the no-light torch effect, in the open air under the total darkness environment, the scope that night visual range is 0～80 meter can be seen people's face clearly, and 80～100 meters scope can be seen human body contour outline clearly, and in the scope of 0～100 meter of night visual range phenomenons of nobody's face whiting all, personage's clear display, picture brightness is even.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (8)
1. infrared night-vision system is characterized in that it comprises:
Communication unit (1), the control signal that is used for receiving sends to main control unit (4);
Infrared array controlling on lamp group unit (2), the control command that is used for sending according to main control unit (4) is controlled lens angle or the size of current of infrared array lamp group (5);
Camera control unit (3), the control command that is used for sending according to main control unit (4) are controlled lens location or the visual angle size of video camera (6), and the visual angle information of video camera (6) is sent to main control unit (4);
Main control unit (4), be used for the control signal according to communication unit (1) transmission, send control command by infrared array controlling on lamp group unit (2) to infrared array lamp group (5), and pass through camera control unit (3) to video camera (6) transmission control command, and cross lens angle or the size of current of infrared array controlling on lamp group unit (2) control infrared array lamp group (5) according to the visual angle information exchange that camera control unit (3) sends; The concrete steps that the visual angle information exchange that sends according to camera control unit (3) is crossed the lens angle of infrared array controlling on lamp group unit (2) control infrared array lamp group (5) or size of current are as follows:
Step 1 reads the lens location value of video camera;
Step 2 is according to the zoom value T of video camera and the zoom value T of the acquisition of the relation between described lens location value video camera;
Step 3, according to formula ω=2 * ATAN[2.4212/ (2 * 3.84 * T)] * 57.2958 obtain the visual angles value ω of video cameras;
Step 4 is according to lens angle or the size of current of described visual angle value ω adjustment infrared array lamp;
Step 4 wherein specifically can comprise:
Step 41, as the visual angle of video camera value ω during greater than 35 °, it is 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that the infrared array lamp of 15 ° and 8 ° is closed;
Step 42, when the visual angle of video camera value ω was 15 °～35 °, it was 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that 15 ° the unlatching power of infrared array lamp is by formula W
1=W * [100-(ω-15) * 4] % determines, the power when wherein W is full power unlatching infrared array lamp, W
1For opening power, the lens angle is that 8 ° infrared array lamp is closed;
Step 43, when the visual angle of video camera value ω was 8 °～15 °, full power was opened the infrared array lamp that the lens angle is 45 ° and 15 °, and the lens angle is that 8 ° the unlatching power of infrared array lamp is by formula W
2=W * [100-(ω-8) * 11] % determines, the power when wherein W is full power unlatching infrared array lamp, W
2For opening power;
Step 44, as the visual angle of video camera value ω during less than 8 °, full power is opened the infrared array lamp that the lens angle is 45 °, 15 ° and 8 °.
2. a kind of infrared night-vision system according to claim 1, it is characterized in that, described infrared array lamp group (5) comprises three groups of infrared array lamps (5-1), and the lens angle of described three groups of infrared array lamps (5-1) is respectively: 45 °, 15 ° and 8 °.
3. a kind of infrared night-vision system according to claim 2 is characterized in that, comprises in infrared array controlling on lamp group unit (2):
Three infrared array lamp control units, the control command that is used for sending according to main control unit (4) is respectively controlled lens angle or the size of current of three groups of infrared array lamps (5-1).
4. a kind of infrared night-vision system according to claim 1 is characterized in that, the model of described main control unit (4) is the LM3404 cake core.
5. the control method of an infrared night-vision system is characterized in that, described infrared night-vision system comprises:
Communication unit (1), the control signal that is used for receiving sends to main control unit (4);
Infrared array controlling on lamp group unit (2), the control command that is used for sending according to main control unit (4) is controlled lens angle or the size of current of infrared array lamp group (5);
Camera control unit (3), the control command that is used for sending according to main control unit (4) are controlled lens location or the visual angle size of video camera (6), and the visual angle information of video camera (6) is sent to main control unit (4);
Main control unit (4), be used for the control signal according to communication unit (1) transmission, send control command by infrared array controlling on lamp group unit (2) to infrared array lamp group (5), and pass through camera control unit (3) to video camera (6) transmission control command, and cross lens angle or the size of current of infrared array controlling on lamp group unit (2) control infrared array lamp group (5) according to the visual angle information exchange that camera control unit (3) sends; Cross lens angle or the size of current that infrared array lamp group (5) is controlled in infrared array controlling on lamp group unit (2) according to the visual angle information exchange that camera control unit (3) sends;
Described method comprises:
Step 1 reads the lens location value of video camera;
Step 2 is according to the zoom value T of video camera and the zoom value T of the acquisition of the relation between described lens location value video camera;
Step 3, according to formula ω=2 * ATAN[2.4212/ (2 * 3.84 * T)] * 57.2958 obtain the visual angles value ω of video cameras;
Step 4 is according to lens angle or the size of current of described visual angle value ω adjustment infrared array lamp;
Step 4 wherein specifically can comprise:
Step 41, as the visual angle of video camera value ω during greater than 35 °, it is 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that the infrared array lamp of 15 ° and 8 ° is closed;
Step 42, when the visual angle of video camera value ω was 15 °～35 °, it was 45 ° infrared array lamp that full power is opened the lens angle, the lens angle is that 15 ° the unlatching power of infrared array lamp is by formula W
1=W * [100-(ω-15) * 4] % determines, the power when wherein W is full power unlatching infrared array lamp, W
1For opening power, the lens angle is that 8 ° infrared array lamp is closed;
Step 43, when the visual angle of video camera value ω was 8 °～15 °, full power was opened the infrared array lamp that the lens angle is 45 ° and 15 °, and the lens angle is that 8 ° the unlatching power of infrared array lamp is by formula W
2=W * [100-(ω-8) * 11] % determines, the power when wherein W is full power unlatching infrared array lamp, W
2For opening power;
Step 44, as the visual angle of video camera value ω during less than 8 °, full power is opened the infrared array lamp that the lens angle is 45 °, 15 ° and 8 °.
6. the control method of a kind of infrared night-vision system according to claim 5, it is characterized in that, described infrared array lamp group (5) comprises three groups of infrared array lamps (5-1), and the lens angle of described three groups of infrared array lamps (5-1) is respectively: 45 °, 15 ° and 8 °.
7. the control method of a kind of infrared night-vision system according to claim 5 is characterized in that, comprises in infrared array controlling on lamp group unit (2):
Three infrared array lamp control units, the control command that is used for sending according to main control unit (4) is respectively controlled lens angle or the size of current of three groups of infrared array lamps (5-1).
8. the control method of a kind of infrared night-vision system according to claim 5 is characterized in that, the model of described main control unit (4) is the LM3404 cake core.
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| US6445884B1 (en) * | 1995-06-22 | 2002-09-03 | 3Dv Systems, Ltd. | Camera with through-the-lens lighting |
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| CN1492280A (en) * | 2002-02-28 | 2004-04-28 | 夏普公司 | Omnibearing monitoring and control system, omnibearing monitoring and control method, omnibearing monitoring and control program and computer readable record medium |
| CN1496135A (en) * | 2002-09-05 | 2004-05-12 | ���µ�����ҵ��ʽ���� | Camera with monitor |
| CN1573505A (en) * | 2003-05-21 | 2005-02-02 | 富士写真光机株式会社 | Visible and infrared light photographing lens system |
| CN101059642A (en) * | 2007-05-16 | 2007-10-24 | 深圳市宝瑞明科技有限公司 | Pickup apparatus and its light source angle control method |
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