CN102339073A - Infrared night vision intelligent control circuit of monitoring video camera - Google Patents
Infrared night vision intelligent control circuit of monitoring video camera Download PDFInfo
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- CN102339073A CN102339073A CN2011103364773A CN201110336477A CN102339073A CN 102339073 A CN102339073 A CN 102339073A CN 2011103364773 A CN2011103364773 A CN 2011103364773A CN 201110336477 A CN201110336477 A CN 201110336477A CN 102339073 A CN102339073 A CN 102339073A
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Abstract
The invention discloses an infrared night vision intelligent control circuit of a monitoring video camera. The circuit comprises a voltage-stabilizing circuit, a detection circuit, a switching circuit, a commutation circuit and a controller, wherein the voltage-stabilizing circuit is used for providing constant direct current voltage; the detection circuit is used for detecting the changes in a working environment of the monitoring video camera; the switching circuit is used for controlling and starting an LED (light-emitting diode) infrared lamp; the commutation circuit is used for controlling a light filter to switch; and the controller is used for outputting a digital switching signal to control the switching circuit to start the LED infrared lamp according to the detection result of the detection circuit and further generating a digital delay signal to control the switching circuit to switch the light filter; and furthermore, the voltage-stabilizing circuit, the detection circuit, the switching circuit and the commutation circuit are connected with the controller. The infrared night vision intelligent control circuit of the monitoring video camera realizes the characteristics of intelligent control of infrared night vision, and stability and reliability in working; and furthermore, the circuit is simple in structure and lower in realization cost.
Description
Technical field
The present invention relates to a kind of control circuit, especially relate to a kind of infrared night vision intelligence control circuit of rig camera.
Background technology
Along with the reinforcement of security personnel consciousness, the increasing various aspects that are applied to live of rig camera, the thing followed are that the working stability performance, serviceable life to rig camera etc. had higher requirement.
Such as, rig camera by day or the sufficient environment of illumination when using down, it is better to catch light effect, and it is clear to form images.If in night or rather dark environment, use rig camera, then because insufficient light causes image blur.Therefore, the rig camera with infrared night vision function occurs thereupon, produces infrared ray through the LDE infrared lamp and realizes the infrared night vision function.
But how accurately testing environment in rig camera starts the infrared night vision function effectively according to the environment conversion, becomes the technical barrier that current urgent need solves.
Summary of the invention
The present invention proposes a kind of infrared night vision intelligence control circuit of rig camera, can start the infrared night vision function according to testing environment conversion control accurately.
The present invention adopts following technical scheme to realize: a kind of infrared night vision intelligence control circuit of rig camera, and it comprises: the mu balanced circuit that constant DC voltage is provided; Be used to detect the testing circuit that the rig camera working environment changes; Be used to control the on-off circuit that starts the LED infrared lamp; Be used to control the commutation circuit that optical filter switches; Be used for testing result according to testing circuit; Output digital switch signal control switch circuit is opened the LED infrared lamp; And produce the controller that a digital inhibit signal control commutation circuit is carried out the optical filter switching, and mu balanced circuit, testing circuit, on-off circuit and commutation circuit all are connected controller.
Wherein, controller is a PLD.Such as, controller is MCU, ARM, DSP, PLC or PLD.
Wherein, mu balanced circuit comprises a three terminal regulator, is connected at least one wave filter between the input power supply of its input end connection+12V, output terminal and ground.
Wherein, testing circuit comprises: an end connects the light activated element of controller, other end ground connection; And the output terminal that connects mu balanced circuit after the light activated element serial connection divider resistance.Such as, light activated element is photoresistance or photodiode.
Wherein, on-off circuit comprises: base stage connects controller, grounded emitter, 2 divider resistance R6 of collector series connection and is connected with R5+and the triode Q4 of 12V power supply; Common port, the emitter that base stage connects 2 divider resistance R6 and R5 be connected+the back triode Q3 of ground connection of 12V power supply, collector series connection resistance R 2; Collector, the drain electrode of grid connection triode Q3 are the MOS transistor Q1 of the output terminal of on-off circuit, source ground.And the output terminal of on-off circuit connects the led drive circuit of LED infrared lamp.
Wherein, commutation circuit comprises: base stage connects the triode Q2 of controller, grounded emitter; Relay, and collector that the two ends of coil connect triode Q2 respectively in the relay and+12V power supply; Connection terminal with 3 wiring, the 1st pin of connection terminal, the 2nd pin and the 3rd pin are connected the 4th pin, the 6th pin and the 8th pin of relay respectively; And the 4th pin and the 6th pin are normally closed contact in the relay, and when the 4th pin and the incision of the 6th pin, the 4th pin will be connected closed with the 8th pin.
Wherein, the 1st pin of connection terminal is a center tap, and the 2nd pin of connection terminal, the 3rd pin lay respectively at the both sides of the 1st pin, and the 2nd pin of connection terminal, the 3rd pin connect through connecting line respectively and drive the optical filter motion.
Compared with prior art, the present invention has following beneficial effect:
1, the infrared night vision intelligence control circuit of the present invention's proposition can detect the environment for use variation accurately, and LED infrared lamp and the switching of control optical filter are opened in control, thereby control the infrared night vision function.
2, the infrared night vision intelligence control circuit that proposes of the present invention use can bear big electric current, the less MOS transistor Q1 of thermal value substitute before high-power darlington transistors in the monitoring camera machine circuit; Thereby need not the additional configuration heat abstractor; Can obviously not increase rig camera enclosure interior heat yet, help guaranteeing the job stability and the reliability of infrared night vision intelligence control circuit.
3, the infrared night vision intelligence control circuit of the present invention's proposition adopts programming device to realize controller, and delay parameter can be provided with by the user according to actual needs at random, provide the user to use the convenient degree of rig camera.
4, the infrared night vision intelligence control circuit of the present invention's proposition uses mu balanced circuit that stable constant voltage source is provided, and can improve the stability of light activated element, makes testing circuit more accurate for the judgement of working environment.
5, the infrared night vision intelligence control circuit that proposes of the present invention have circuit structure simple, realize the lower advantage of cost.
Description of drawings
Fig. 1 is a functional circuit module synoptic diagram of the present invention;
Fig. 2 is the circuit diagram of Fig. 1 middle controller;
Fig. 3 is the synoptic diagram of mu balanced circuit among Fig. 1;
Fig. 4 is the synoptic diagram of testing circuit among Fig. 1;
Fig. 5 is the synoptic diagram of on-off circuit among Fig. 1;
Fig. 6 is the synoptic diagram of commutation circuit among Fig. 1.
Embodiment
As shown in Figure 1, the present invention proposes a kind of infrared night vision intelligence control circuit of rig camera, and it comprises: controller 10; Constant DC voltage (+5V) mu balanced circuit 20 is provided; Be used for testing environment and change, when darkness or dark surrounds, produce the testing circuit 30 of high level or level detection signal, it connects controller 10; Be used to control the on-off circuit 40 that starts the LED infrared lamp, connect between the driving circuit of controller 10 and LED lamp; Be used to control the commutation circuit 50 that optical filter switches, it connects controller 10.Control starting switch circuit 40 by controller 10 according to detection signal, and control commutation circuit 50 realizes that eyeglasses switch.
In conjunction with shown in Figure 2, chip U2 is a controller 10, and it adopts PLD, realizes such as chips such as single-chip microcomputer (MCU), ARM, DSP, PLC, PLD, is convenient to the hack of controlled variable.Wherein, the 1st pin of chip U2 is a power end, 20 outputs of connection mu balanced circuit+the 5V power supply, the 2nd pin (RELAY) connects commutation circuit 50, the 3 pin (MOS) and connects on-off circuit 40; The 6th pin (PHOTO) connection detection circuit 30.
In conjunction with shown in Figure 3, mu balanced circuit 20 comprises: three terminal regulator U1; From on-off circuit 40 output+the 12V power supply is connected the input end (the 3rd pin) of three terminal regulator U1 through the current-limiting resistance R8 of serial connection, and is connected wave filter C3 between the input end of three terminal regulator U1 and the ground; Constant+5V the power supply of the output terminal of three terminal regulator U1 (the 1st pin) output, and be connected wave filter C1 and wave filter C2 between the output terminal of three terminal regulator U1 and the ground.Wherein, the output terminal of three terminal regulator U1 connects the 1st pin of chip U2, i.e. three terminal regulator U1 output+the 5V power supply is that chip U2 supplies power.
In conjunction with shown in Figure 4, testing circuit 30 comprises: an end connects the 6th pin (PHOTO) of chip U2, the light activated element P1 of other end ground connection; And light activated element P1 is connected in series the output terminal that connects three terminal regulator U1 after two the divider resistance R4, R3 successively.Such as, light activated element P1 is photoresistance or photodiode etc.
Wherein, Draw the two ends that 2 long leads are connected light activated element P1 respectively from the 6th pin, the ground wire of chip U2; And light activated element P1 is arranged on the shell of rig camera, such as the front side lens position of rig camera, changes with the light of preparing induction camera lens position.
In a preferred embodiment, light activated element P1 is photoresistance.By day or under the stronger environment of light, the resistance of photoresistance is very little, at this moment, the 6th pin of chip U2 is a low level; Under night or dark surrounds, the resistance of photoresistance is bigger, at this moment, the output terminal of three terminal regulator U1 output+the 5V power supply produces a dividing potential drop in photoresistance, and the 6th pin of chip U2 is a high level.Therefore, the level that chip U2 detects the 6th pin changes, and can learn the variation of rig camera working environment.
In addition,, can improve the stability of light activated element P1, make testing circuit 30 more accurate for the judgement of working environment because testing circuit 30 uses mu balanced circuit 20 power supplies.
In conjunction with shown in Figure 5, on-off circuit 40 comprises: the 3rd pin (MOS) of chip U2 is through the base stage of current-limiting resistance R7 connection triode Q4, and the grounded emitter of this triode Q4, collector are connected in series 2 divider resistance R6 successively and are connected with R5+the 12V power supply; The common port of 2 divider resistance R6 and R5 is connected the base stage of triode Q3, the emitter connection+12V power supply of triode Q3, collector series connection resistance R 2 back ground connection; The collector of triode Q3 connects the grid (G) of MOS transistor Q1, and the drain electrode of MOS transistor Q1 is output terminal (SW_ON), source electrode (S) ground connection of on-off circuit 40.
And the output terminal of on-off circuit 40 (SW_ON) connects the led drive circuit of LED infrared lamp.
Export the digital switch signal to on-off circuit 40 by the 3rd pin (MOS) of chip U2.The digital switch signal is a scale-of-two high-low level switching signal: when testing circuit 30 detects darkness or environment deepening, produce the digital switch signal of high level by controller 10, otherwise produce low level digital switch signal.When the digital switch signal is high level; Triode Q4 conducting; Pulling triode Q3 conducting, by triode Q3 pulling MOS transistor Q1 conducting, the power supply of+12V is through triode Q3, MOS transistor Q1 from output terminal (SW_ON) (simultaneously; The electric current of the drain electrode of MOS transistor Q1 output 300mA) exports to the driving circuit of LED infrared lamp, produce required big voltage of driving LED infrared lamp work and big electric current by driving circuit.
Wherein, MOS transistor Q1 can bear big electric current, and thermal value is less, need not the additional configuration heat abstractor, also can obviously not increase rig camera enclosure interior heat, helps guaranteeing the job stability and the reliability of infrared night vision intelligence control circuit.
In conjunction with shown in Figure 6, commutation circuit 50 comprises: the 2nd pin (RELAY) of chip U2 is through the base stage of current-limiting resistance R1 connection triode Q2, and the grounded emitter of this triode Q2, collector are through sustained diode 1 connection+12V power supply; And the collector of triode Q2 ,+the 12V power supply connects the two ends (i.e. the 1st pin and the 2nd pin) of coil in the relay K 1 respectively, and the 4th pin and the 6th pin are normally closed contact in the relay K 1, and when the 4th pin and the 6th pin cut, the 4th pin will be connected closure with the 8th pin; And the 4th pin of relay K 1 connects the 1st pin of connection terminal J1, and the 6th pin of relay K 1, the 8th pin connect the 2nd pin, the 3rd pin of connection terminal J1 respectively.
The 1st pin of connection terminal J1 is a center tap; The 2nd pin of connection terminal J1, the 3rd pin lay respectively at the 1st pin about (or up and down) both sides, and the 2nd pin of connection terminal J1, the 3rd pin connect optical filter through the shooting cavity that connecting line extends to rig camera respectively.Like this, when the 6th pin of the 4th pin of relay K 1 and relay K 1 or the 8th pin are closed, will spurs optical filter (up or down) motion to the left or to the right, thereby realize the optical filter switching by the 2nd pin of connection terminal J1, the connecting line of the 3rd pin.
When testing circuit 30 detects darkness or dark surrounds; Send one by controller 10 (the 2nd pin (RELAY) of chip U2) and be the digital delay signal of high level; Triode Q2 conducting makes after the 4th pin and the 6th pin cut in the relay K 1 the 4th pin and the 8th pin closure in the relay K 1; Thereby will spur the optical filter motion through the 2nd pin of connection terminal J1, the connecting line of the 3rd pin, realize that optical filter switches.
Wherein, the concrete delay parameter of digital delay signal can be set in chip U2.The purpose that delay is set is to reduce misoperation: such as, when an of short duration light under the night environment, occurring, when testing circuit 30 detects light,, then will cause misoperation and make the infrared night vision disabler if this moment, optical filter was switched in control.Therefore, can be provided with a delay parameter (such as, 60 seconds), through behind the delay parameter, if when testing circuit 30 still detects light, this moment, optical filter was switched in control again, then will reduce the probability of misoperation greatly.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the infrared night vision intelligence control circuit of a rig camera is characterized in that, said infrared night vision intelligence control circuit comprises:
The mu balanced circuit of constant DC voltage is provided;
Be used to detect the testing circuit that the rig camera working environment changes;
Be used to control the on-off circuit that starts the LED infrared lamp;
Be used to control the commutation circuit that optical filter switches;
Be used for testing result according to testing circuit; Output digital switch signal control switch circuit is opened the LED infrared lamp; And produce the controller that a digital inhibit signal control commutation circuit is carried out the optical filter switching, and mu balanced circuit, testing circuit, on-off circuit and commutation circuit all are connected controller.
2. according to the infrared night vision intelligence control circuit of the said rig camera of claim 1, it is characterized in that controller is a PLD.
3. according to the infrared night vision intelligence control circuit of the said rig camera of claim 2, it is characterized in that controller is MCU, ARM, DSP, PLC or PLD.
4. according to the infrared night vision intelligence control circuit of the said rig camera of claim 1, it is characterized in that mu balanced circuit comprises a three terminal regulator, be connected at least one wave filter between the input power supply of its input end connection+12V, output terminal and ground.
5. according to the infrared night vision intelligence control circuit of the said rig camera of claim 1, it is characterized in that testing circuit comprises: an end connects the light activated element of controller, other end ground connection; And the output terminal that connects mu balanced circuit after the light activated element serial connection divider resistance.
6. according to the infrared night vision intelligence control circuit of the said rig camera of claim 5, it is characterized in that light activated element is photoresistance or photodiode.
7. according to the infrared night vision intelligence control circuit of the said rig camera of claim 1, it is characterized in that on-off circuit comprises:
Base stage connects controller, grounded emitter, 2 divider resistance R6 of collector series connection and is connected with R5+the triode Q4 of 12V power supply;
Common port, the emitter that base stage connects 2 divider resistance R6 and R5 be connected+the back triode Q3 of ground connection of 12V power supply, collector series connection resistance R 2;
Collector, the drain electrode of grid connection triode Q3 are the MOS transistor Q1 of the output terminal of on-off circuit, source ground.
8. according to the infrared night vision intelligence control circuit of the said rig camera of claim 7, it is characterized in that the output terminal of on-off circuit connects the led drive circuit of LED infrared lamp.
9. according to the infrared night vision intelligence control circuit of the said rig camera of claim 1, it is characterized in that commutation circuit comprises:
Base stage connects the triode Q2 of controller, grounded emitter;
Relay, and collector that the two ends of coil connect triode Q2 respectively in the relay and+12V power supply;
Connection terminal with 3 wiring, the 1st pin of connection terminal, the 2nd pin and the 3rd pin are connected the 4th pin, the 6th pin and the 8th pin of relay respectively;
And the 4th pin and the 6th pin are normally closed contact in the relay, and when the 4th pin and the incision of the 6th pin, the 4th pin will be connected closed with the 8th pin.
10. according to the infrared night vision intelligence control circuit of the said rig camera of claim 9; It is characterized in that; The 1st pin of connection terminal is a center tap; The 2nd pin of connection terminal, the 3rd pin lay respectively at the both sides of the 1st pin, and the 2nd pin of connection terminal, the 3rd pin connect through connecting line respectively and drive the optical filter motion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103364773A CN102339073A (en) | 2011-10-31 | 2011-10-31 | Infrared night vision intelligent control circuit of monitoring video camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103364773A CN102339073A (en) | 2011-10-31 | 2011-10-31 | Infrared night vision intelligent control circuit of monitoring video camera |
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| CN102339073A true CN102339073A (en) | 2012-02-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237381A (en) * | 2013-04-01 | 2013-08-07 | 天津天地伟业数码科技有限公司 | Optical filter switching circuit and optical filter switching method for infrared monitoring |
| CN107948537A (en) * | 2018-01-05 | 2018-04-20 | 深圳市众鑫创展科技有限公司 | Optical signal A/D convertor circuit, optical-filter switcher and optical filter switching method |
| CN109996061A (en) * | 2017-12-29 | 2019-07-09 | 浙江宇视科技有限公司 | The method for detecting abnormality and device of IR-CUT |
| CN115134524A (en) * | 2022-06-24 | 2022-09-30 | 深圳市聚芯影像有限公司 | Intelligent vehicle-mounted camera control system based on Internet of things |
-
2011
- 2011-10-31 CN CN2011103364773A patent/CN102339073A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237381A (en) * | 2013-04-01 | 2013-08-07 | 天津天地伟业数码科技有限公司 | Optical filter switching circuit and optical filter switching method for infrared monitoring |
| CN103237381B (en) * | 2013-04-01 | 2016-04-20 | 天津天地伟业数码科技有限公司 | For filter commutation circuit and the filter changing method of infrared monitoring |
| CN109996061A (en) * | 2017-12-29 | 2019-07-09 | 浙江宇视科技有限公司 | The method for detecting abnormality and device of IR-CUT |
| CN109996061B (en) * | 2017-12-29 | 2020-07-28 | 浙江宇视科技有限公司 | IR-CUT (Infrared-CUT) anomaly detection method and device |
| CN107948537A (en) * | 2018-01-05 | 2018-04-20 | 深圳市众鑫创展科技有限公司 | Optical signal A/D convertor circuit, optical-filter switcher and optical filter switching method |
| CN107948537B (en) * | 2018-01-05 | 2024-01-05 | 深圳市众鑫创展科技有限公司 | Optical signal AD conversion circuit, optical filter switcher and optical filter switching method |
| CN115134524A (en) * | 2022-06-24 | 2022-09-30 | 深圳市聚芯影像有限公司 | Intelligent vehicle-mounted camera control system based on Internet of things |
| CN115134524B (en) * | 2022-06-24 | 2023-08-18 | 深圳市聚芯影像有限公司 | Intelligent vehicle-mounted camera control system based on Internet of things |
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Application publication date: 20120201 |