CN108933900A - A kind of video camera light filling control circuit and its control method - Google Patents
A kind of video camera light filling control circuit and its control method Download PDFInfo
- Publication number
- CN108933900A CN108933900A CN201811024048.0A CN201811024048A CN108933900A CN 108933900 A CN108933900 A CN 108933900A CN 201811024048 A CN201811024048 A CN 201811024048A CN 108933900 A CN108933900 A CN 108933900A
- Authority
- CN
- China
- Prior art keywords
- module
- light
- main control
- capacitor
- connect
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/617—Upgrading or updating of programs or applications for camera control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/65—Control of camera operation in relation to power supply
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/745—Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Software Systems (AREA)
- Studio Devices (AREA)
Abstract
The invention discloses a kind of video camera light filling control circuits, the circuit includes power module, supplementary lighting module and photosensitive module, the circuit further includes having main control module, power module is connect with main control module, photosensitive module and supplementary lighting module respectively, and photosensitive module and supplementary lighting module are connect with main control module.Invention additionally discloses a kind of video camera light supplement control methods, this method is after opening light compensating lamp, delay reads again ambient light parameter G2 in three seconds, luminance parameter G2 is obtained into T1 according to reference value plus ambient light, ambient light parameter G3 at this time is read again, by ambient light parameter G3 at this time compared with T1, if G3 is greater than T1, then turn off the light；If G3 is less than T1, then light compensating lamp is kept to open.Main control module is added in circuit provided by the invention, the control burning program set enters in main control module, controls supplementary lighting module with this and opens or closes in due course, avoids light compensating lamp stroboscopic, reduces the power consumption of integrated circuit, and video camera is helped to obtain best monitoring image quality.
Description
Technical field
The invention belongs to field of camera technology, in particular to a kind of video camera light filling control circuit and its control method.
Background technique
It is the common security protection means of people to formulating region to carry out monitoring in 24 hours using video camera, by camera sensor
Sensitive technologies limitation, can not use at night, so light filling can be added in the video camera of manufacture monitor in video camera manufacturer
Lamp (infrared lamp or visible lamp) meets night vision monitoring demand for night.
Such as number of patent application be " 201620273103.X " patent application document in disclose a kind of safety monitoring and set
It is standby, including shell, the shell are hemispherical Shell, and circuit board, camera, rotating device, the shell are provided in the shell
Body is connect with bracket, and shell can be rotated automatically by rotating device, is provided with sensitive tape on the housing exterior walls, on the shell
It is provided with light compensating lamp, the light compensating lamp incudes light intensity according to sensitive tape and controls luminous intensity.Protection is provided on shell
The shield of camera；The shell is connect with bracket by connecting pin；The bracket includes fixed plate；The light compensating lamp is
LED light.The utility model provides a kind of safety monitoring equipment, due to being provided with sensitive tape on housing exterior walls, sets on shell
It is equipped with light compensating lamp, light compensating lamp incudes light intensity according to sensitive tape and controls luminous intensity, so as to mend automatically according to light intensity
Light, to provide clearly monitored picture.Sensitive tape is provided in the utility model, sensitive tape incudes the power of ambient, and
The strong and weak signals of ambient are sent back into circuit board, are gone out with the amount that this controls light compensating lamp, however, there are light fillings for the utility model
The problem of lamp stroboscopic: when night come available light it is dimmed when, sensitive tape senses that ambient is dimmed, circuit board i.e. start mend
Light lamp carries out light filling to imaging area, once light compensating lamp is opened, then sensitive tape senses that imaging area brightness becomes strong again, at this time
Circuit board, which controls light compensating lamp and closes, stops light filling, causes light compensating lamp stroboscopic repeatedly, influences the normal use of video camera.
And such problems is equally existed in the application documents that number of patent application is " 201320533417.5 ", this is practical
Novel to disclose a kind of adaptive light compensating apparatus of monitor camera, it includes light compensating lamp, controllable constant current source circuit, is mounted on monitoring
The connectivity port of the light compensating lamp around the camera lens of video camera is connect with the light signal output port of the controllable constant current source circuit,
The corresponding controling end mouth of the central processing unit of the signal input port and monitor camera of the controllable constant current source circuit is connect.This
Utility model can guarantee figure according to the judgement of itself local environment based on monitor camera to automatically adjust the brightness of light compensating lamp
As the fine definition of shooting, the different brightness demands at daytime, night are met.The utility model is mended using the control of controllable constant-current source
The amount of light lamp is gone out, the signal of control switch lamp inevitably from the photosensitive sensor being mounted near monitor camera,
Usually photosensitive sensor is mounted on the buttock line of monitor camera in industry now, and keeps light sensor during the installation process
The direction of device is contrary with the light injection of light compensating lamp, but the installation method only can be suitably used for outdoor more spacious environment
In, for small or intensive monitoring area, the light of light compensating lamp reflection equally influences whether the normal induction of photosensitive sensor, into
And lead to light compensating lamp stroboscopic.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of solution video camera light compensating lamp stroboscopic problem, making to mend
Light lamp can in the case where ambient light is darker normal light filling video camera light filling control circuit and its control method.
It is another object of the present invention to provide a kind of video camera light filling control circuits, and the circuit execution efficiency is high,
Dynamic role is strong, applied widely, is suitable for being widely applied.
To achieve the above object, technical scheme is as follows:
The present invention provides a kind of video camera light filling control circuit, which includes power module, supplementary lighting module and photosensitive
Module, the circuit further include having main control module, and power module is connect with main control module, photosensitive module and supplementary lighting module respectively, light
Quick module and supplementary lighting module are connect with main control module.
The present invention increases main control module in light filling lamp control circuit, and extraneous power supply is supplied by power module to whole circuit
Electricity guarantees the normal work of whole circuit, and the light-sensitive element real-time monitoring ambient light for including in photosensitive module, main control module is to light
The ambient light signal that quick module is passed back carries out judgement and operation, and combine the unlatching of process control supplementary lighting module that sets with
It closes, avoids light compensating lamp in supplementary lighting module stroboscopic in a dark environment, complete specified region with guaranteeing video camera high-quality and high-efficiency
Monitoring work.
Main control module includes main control chip, the concrete model of main control chip are as follows: STC15W201S-SOP8.
STC15W201S series monolithic is the single-chip microcontroller of the single clock cycle of STC production, is a kind of Width funtion, high speed, highly reliable, low
8051 single-chip microcontroller of a new generation of power consumption, superpower anti-interference ability.STC15W201S series monolithic encrypts skill using the 9th generation of STC
Art, completely compatible traditional 8051 single-chip microcontroller of instruction code.In addition, when STC15W201S series monolithic is internally integrated high-precision RC
Clock, 5MHz-35MHz wide scope is optional when ISP is programmed, and 16 grades of reset threshold voltages are optional.STC15W201S series monolithic is set
One group of High-speed Asynchronous Secial Communication mouth, and built-in comparator are set, it is powerful.STC15W201S series monolithic is applied in the present invention
Machine, can the burning setting program in single-chip microcontroller in advance, the ambient light signal that real-time operation photosensitive module is passed back, and at any time according to
Setting program controls the work of supplementary lighting module, thus can effectively solve video camera light compensating lamp stroboscopic problem.
Power module includes three terminal regulator, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th electricity
Appearance, the 6th capacitor, the first inductance and the second inductance；The concrete model of three terminal regulator are as follows: AMS1117-3.3；Three terminal regulator
Input terminal connect with extraneous DC power supply, the ground terminal ground connection of three terminal regulator, the output end and master control mould of three terminal regulator
Block connection；One end of first capacitor is connect with the common end of extraneous DC power supply and three terminal regulator, the other end of first capacitor
Ground connection；One end of second capacitor is connect with the common end of three terminal regulator and main control module, the other end ground connection of the second capacitor；The
One end of three capacitors is connect with the common end of three terminal regulator and main control module, the other end ground connection of the second inductance；4th capacitor
One end connect with the common end of three terminal regulator and main control module, the other end of the 4th capacitor ground connection；One end of first inductance
It is connect with the common end of three terminal regulator and main control module, the other end of the first inductance is connect with photosensitive module；Second inductance
One end is connect with the common end of extraneous DC power supply and three terminal regulator, and the other end and supplementary lighting module of second inductance connect
It connects；One end of 4th capacitor is connect with the common end of the second inductance and supplementary lighting module, the other end ground connection of the 4th capacitor；5th electricity
One end of appearance is connect with the common end of the second inductance and supplementary lighting module, the other end ground connection of the 5th capacitor, one end of the 6th capacitor
It is connect with the common end of the second inductance and supplementary lighting module, the other end ground connection of the 6th capacitor.AMS1117 is a positive low pressure drop
Voltage-stablizer is reduced to 1.2V in 1A current down.AMS1117 is internally integrated overheating protection and current-limiting circuit, be battery power supply and just
Take the optimal selection of formula computer.There are two versions by AMS1117: fixed output version and tunable versions, and fixed output voltage is
1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, with 1% precision.AMS1117-3.3 is used in the present invention, it can
Fixed output 3.3V voltage guarantees that extraneous DC power supply after the conversion by three terminal regulator, can be mentioned normally to subsequent conditioning circuit
For power supply.First capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, are additionally set in power module
Six capacitors and the second inductance can further protect the input terminal and output end of three terminal regulator, play the role of filtering be isolated,
Clutter is avoided to be mixed into circuit.
Supplementary lighting module light filling driving unit and light compensating lamp unit, light filling driving unit are connect with light compensating lamp unit, light compensating lamp
Unit includes driving chip, the concrete model of driving chip are as follows: BL9582；Light compensating lamp unit include one and more than one
Light emitting diode, the anode of light emitting diode connect with power module, and the cathode and light filling driving unit of light emitting diode connect
It connects.Light compensating lamp unit includes one and more than one light emitting diode in the present invention, using the light compensating lamp of light emitting diode
Unit can reduce energy consumption to the full extent, energy saving, and driving chip is additionally provided between light compensating lamp unit and main control module,
Driving chip selects BL9582, and BL9582 is the decompression constant-current source of a continuous inductive current conduction mode, for driving one
Or more series LEDs.BL9582 input voltage range exports current adjustment from 6V to 32V, maximum up to 1.4A.According to difference
Input voltage and external devices, BL9582 can export up to tens of watts of power, add driving chip can guarantee master control core
Piece smoothly controls light emitting diode and works by setup program.
Photosensitive module includes photo resistance, and photo resistance is Cds photo resistance；The both ends of photo resistance with power supply mould
Block connection.Cds photo resistance is the most common photo resistance, spectrum individual features closest to human eye spectral luminous efficiency, it
Sensitivity highest in visible light wave segment limit is widely used in the automatic control of light, the automatic light measuring etc. of camera.
The application application Cds photo resistance is photoreceptor, not only reduces the preparation cost of device entirety, further improves whole
The applicability of body circuit.
6, a kind of video camera light filling lamp control method, this method includes following steps:
S1: initialization main control chip；
S2: main control module reads the ambient light parameter G1 of the photosensitive module output at this moment；
S3: judging whether photosensitive module output parameter G1 is less than threshold value, such as less than threshold value, then is transferred to S4, such as larger than threshold value,
Then return to S2；
S4: it turns on light；
S5: delay three seconds, main control module read again the ambient light parameter G2 of the photosensitive module output at this moment；Delay
Three seconds, extraneous light was stable, and at this time reading ambient light parameter again can guarantee that the parameter read is more nearly reality
Value reduces reading error.
S6:G2 obtains T1 according to reference value plus ambient light；
S7: main control module reads the ambient light parameter G3 of photosensitive module output at this time；
S8: comparing the size of G3 and T1, if G3 is greater than T1, is then transferred to S9, if G3 is less than T1, then returns to S7；
S9: it turns off the light.
Photo resistance incudes external environment brightness in real time, and converts electric signal for external environment luminance signal and pass master control back
In chip, main control chip is facilitated to judge external environment brightness.When camera operation is in the enough environment of extraneous sufficient brightness, master control
Module reads the ambient light parameter G1 of the photosensitive module output at this moment, judges that G1 is greater than given threshold, does not then turn on light, keeps
The working condition of video camera can normally complete the monitoring work in specified region at this time.When camera operation is in extraneous luminance shortage
Environment in when, main control module judge G1 be less than given threshold, then main control module control supplementary lighting module open, for video camera mend
Light.After supplementary lighting module is opened, to prevent stroboscopic, main control module will re-read ambient light parameter G2 after delay three seconds, and will
G2 adds the ambient light set and obtains T1 according to reference value, ambient light parameter G3 is read again, and by G3 compared with T1, such as G3
It is bigger than T1, then show occurred natural lighting in external environment at this time, and the brightness that natural lighting provides can guarantee video camera
It is recorded to the monitored picture for meeting image quality requirement, then main control module control supplementary lighting module stops working at this time.By above-mentioned control
Ambient light variation not only can be monitored in real time in method, video camera light filling control circuit provided by the invention, can also be with extraneous ring
The in due course unlatching supplementary lighting module of border brightness change is video camera light filling, guarantees that it is able to be recorded in a dark environment to meet picture
The monitored picture that matter requires, meanwhile, this control method also efficiently avoids light compensating lamp stroboscopic problem, and application is provided by the invention
After control circuit and control method, the mountable any position with needs of the photosensitive module of video camera is protected from light problem without considering,
This reduces installation difficulty on the one hand, also improves the accuracy of photosensitive module inductive light intensity on the other hand.
Further, S6:G2 is obtained in T1 plus ambient light according to reference value, and ambient light is 1000 according to reference value.It needs strong
It adjusts, the ambient light set in the present invention is not limited only to 1000 according to reference value, and ambient light is according to the thin photosensitive sensor of reference value
The factors such as type, photosensitive fluctuation range, environmental change influence, and set 1000 according to reference value for ambient light irradiation in the application,
Be applicant by numerous experiments, summarize the specific data of this control circuit in practical applications after, selection it is relatively reasonable,
And it is able to achieve the data of preferable effect.
Further, S4: turn on light start execute while, the working condition of main control chip real-time monitoring light compensating lamp, master control
Timer in chip is started to work, and if main control chip monitors that light compensating lamp work surpasses 12 hours, is then transferred to S9, is such as less than 12
Hour, then it waits.Light compensating lamp was opened more than 12 hours, and extraneous natural lighting is inevitable varied, and main control chip is controllable at this time
Light compensating lamp is closed, and waste of energy is avoided, and reduces circuit energy consumption.
Present invention has an advantage that compared with the prior art, adding main control module in circuit provided by the invention, setting
Control burning program enter in main control module, supplementary lighting module is controlled with this and is opened or closed in due course, light compensating lamp stroboscopic is avoided, reduce
The power consumption of integrated circuit helps video camera to obtain best monitoring image quality.
Detailed description of the invention
Fig. 1 is the circuit diagram of video camera light filling control circuit of the present invention.
Fig. 2 is the first partial enlarged drawing of the circuit diagram of video camera light filling control circuit of the present invention.
Fig. 3 is the first partial enlarged drawing of the circuit diagram of video camera light filling control circuit of the present invention.
Fig. 4 is the first partial enlarged drawing of the circuit diagram of video camera light filling control circuit of the present invention.
Fig. 5 is the flow chart of the control method of video camera light filling control circuit of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
To achieve the above object, technical scheme is as follows:
Referring to shown in Fig. 1-4, the present invention provides a kind of video camera light filling control circuit, the circuit include power module,
Supplementary lighting module and photosensitive module, the circuit further include having main control module, power module respectively with main control module, photosensitive module and benefit
Optical module connection, photosensitive module and supplementary lighting module are connect with main control module.
The present invention increases main control module in light filling lamp control circuit, and extraneous power supply is supplied by power module to whole circuit
Electricity guarantees the normal work of whole circuit, and the light-sensitive element real-time monitoring ambient light for including in photosensitive module, main control module is to light
The ambient light signal that quick module is passed back carries out judgement and operation, and combine the unlatching of process control supplementary lighting module that sets with
It closes, avoids light compensating lamp in supplementary lighting module stroboscopic in a dark environment, complete specified region with guaranteeing video camera high-quality and high-efficiency
Monitoring work.
Main control module includes main control chip U2, the concrete model of main control chip U2 are as follows: STC15W201S-SOP8.
STC15W201S series monolithic is the single-chip microcontroller of the single clock cycle of STC production, be a kind of Width funtion, high speed,
Highly reliable, low-power consumption, superpower anti-interference ability 8051 single-chip microcontroller of a new generation.STC15W201S series monolithic is using STC the
Nine generation encryption technologies, completely compatible traditional 8051 single-chip microcontroller of instruction code.In addition, STC15W201S series monolithic is internally integrated
High-precision RC clock, 5MHz-35MHz wide scope is optional when ISP is programmed, and 16 grades of reset threshold voltages are optional.STC15W201S system
One group of High-speed Asynchronous Secial Communication mouth, and built-in comparator is arranged in column single-chip microcontroller, powerful.It is applied in the present invention
STC15W201S series monolithic, can the burning setting program in single-chip microcontroller in advance, the external world that real-time operation photosensitive module is passed back
Luminance signal, and video camera light compensating lamp stroboscopic thus can be effectively solved according to the work of setting program control supplementary lighting module at any time
Problem.
Power module includes three terminal regulator U4, first capacitor C11, the second capacitor C7, third capacitor C2, the 4th capacitor
C13, the 5th capacitor C15, the 6th capacitor C1, the first inductance R9 and the second inductance L1；The concrete model of three terminal regulator U4 are as follows:
AMS1117-3.3；The input terminal of three terminal regulator U4 is connect with extraneous DC power supply, the ground terminal ground connection of three terminal regulator U4,
The output end of three terminal regulator U4 is connect with main control module；One end of first capacitor C11 and extraneous DC power supply and three-terminal voltage-stabilizing
The common end of device U4 connects, the other end ground connection of first capacitor C11；One end of second capacitor C7 and three terminal regulator U4 and master control
The common end of module connects, the other end ground connection of the second capacitor C7；One end of third capacitor C2 and three terminal regulator U4 and master control
The common end of module connects, the other end ground connection of the second inductance L1；One end of 4th capacitor C13 and three terminal regulator U4 and master control
The common end of module connects, the other end ground connection of the 4th capacitor C13；One end of first inductance R9 and three terminal regulator U4 and master control
The common end of module connects, and the other end of the first inductance R9 is connect with photosensitive module；One end of second inductance L2 and extraneous direct current
Power supply is connected with the common end of three terminal regulator U4, and the other end of the second inductance L1 is connect with supplementary lighting module；4th capacitor
One end of C13 is connect with the common end of the second inductance L1 and supplementary lighting module, the other end ground connection of the 4th capacitor C13；5th capacitor
One end of C15 is connect with the common end of the second inductance L1 and supplementary lighting module, the other end ground connection of the 5th capacitor C15, the 6th capacitor
One end of C1 is connect with the common end of the second inductance L1 and supplementary lighting module, the other end ground connection of the 6th capacitor C1.AMS1117 is one
A forward direction low dropout voltage regulator, is reduced to 1.2V in 1A current down.AMS1117 is internally integrated overheating protection and current-limiting circuit, is
The optimal selection of battery power supply and portable computer.There are two versions by AMS1117: fixed output version and tunable versions, Gu
Determining output voltage is 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, with 1% precision.It is used in the present invention
AMS1117-3.3 can fix output 3.3V voltage, guarantee that extraneous DC power supply, can after the conversion of three terminal regulator U4
Normally power supply is provided to subsequent conditioning circuit.First capacitor C11, the second capacitor C7, third capacitor are additionally set in power module
C2, the 4th capacitor C13, the 5th capacitor C15, the 6th capacitor C1 and the second inductance L1 can further protect that three terminal regulator U4's is defeated
Enter end and output end, play the role of filtering be isolated, avoid clutter from being mixed into circuit.
Supplementary lighting module light filling driving unit and light compensating lamp unit, light filling driving unit are connect with light compensating lamp unit, light compensating lamp
Unit includes driving chip IC1, the concrete model of driving chip IC1 are as follows: BL9582；Light compensating lamp unit includes one and one
A above light emitting diode, the anode of light emitting diode are connect with power module, and the cathode and light filling of light emitting diode drive
Unit connection.Light compensating lamp unit includes one and more than one light emitting diode in the present invention, using light emitting diode
Light compensating lamp unit can reduce energy consumption to the full extent, energy saving, and drive is additionally provided between light compensating lamp unit and main control module
Dynamic chip IC 1, driving chip IC1 select BL9582, and BL9582 is the decompression constant-current source of a continuous inductive current conduction mode,
For driving one or more series LEDs.BL9582 input voltage range exports current adjustment from 6V to 32V, maximum reachable
1.4A.According to different input voltage and external devices, BL9582 can export up to tens of watts of power, add driving chip
IC1 can guarantee that main control chip U2 smoothly controls light emitting diode and works by setup program.
Photosensitive module includes photo resistance R100, and photo resistance R100 is Cds photo resistance；The two of photo resistance R100
End is connect with power module.Cds photo resistance is the most common photo resistance, and spectrum individual features are closest to human eye spectral light
Apparent efficiency, its sensitivity highest in visible light wave segment limit, is widely used in the automatic control of light, camera
Automatic light measuring etc..The application application Cds photo resistance is photoreceptor, the preparation cost of device entirety is not only reduced, more into one
Improve to step the applicability of integrated circuit.
Refering to Fig. 5, the present invention discloses a kind of video camera light filling lamp control method, and this method includes following steps:
S1: initialization main control chip U4；
S2: main control module reads the ambient light parameter G1 of the photosensitive module output at this moment；
S3: judging whether photosensitive module output parameter is less than threshold value, such as less than threshold value, then is transferred to S4, such as larger than threshold value, then
Return to S2；
S4: it turns on light；
S5: delay three seconds, main control module read again the ambient light parameter G2 of the photosensitive module output at this moment；Delay
Three seconds, extraneous light was stable, and at this time reading ambient light parameter again can guarantee that the parameter read is more nearly reality
Value reduces reading error.
S6:G2 obtains T1 according to reference value plus ambient light；
S7: main control module reads the ambient light parameter G3 of photosensitive module output at this time；
S8: comparing the size of G3 and T1, if G3 is greater than T1, is then transferred to S9, if G3 is less than T1, then returns to S7；
S9: it turns off the light.
Photo resistance R100 incudes external environment brightness in real time, and converts electric signal for external environment luminance signal and pass back
In main control chip U4, main control chip U4 is facilitated to judge external environment brightness.When the environment that camera operation is enough in extraneous sufficient brightness
When middle, main control module reads the ambient light parameter G1 of the photosensitive module output at this moment, judges that G1 is greater than given threshold, then not
It turns on light, keeps the working condition of video camera at this time that can normally complete the monitoring work in specified region.When camera operation outside
When in the environment of boundary's luminance shortage, main control module judges that G1 is less than given threshold, then main control module control supplementary lighting module is opened, and is
Video camera light filling.After supplementary lighting module is opened, to prevent stroboscopic, main control module will re-read ambient light parameter after delay three seconds
G2, and G2 is added the ambient light that sets and obtains T1 according to reference value, reads again ambient light parameter G3, and by G3 and T1 ratio
Compared with, if G3 ratio T1 is big, then show occurred natural lighting in external environment at this time, and natural lighting provide brightness can guarantee
Video camera is recorded to the monitored picture for meeting image quality requirement, then main control module control supplementary lighting module stops working at this time.By upper
State control method, ambient light variation not only can be monitored in real time in video camera light filling control circuit provided by the invention, can also be with
The in due course unlatching supplementary lighting module of external environment brightness change is video camera light filling, guarantees that it is recorded in a dark environment
Meet the monitored picture of image quality requirement, meanwhile, this control method also efficiently avoids light compensating lamp stroboscopic problem, using the present invention
After the control circuit and control method of offer, the mountable any position with needs of the photosensitive module of video camera is kept away without considering
Optical issue, this reduces installation difficulty on the one hand, also improves the accuracy of photosensitive module inductive light intensity on the other hand.
Further, S6:G2 is obtained in T1 plus ambient light according to reference value, and ambient light is 1000 according to reference value.It needs strong
It adjusts, the ambient light set in the present invention is not limited only to 1000 according to reference value, and ambient light is according to the thin photosensitive sensor of reference value
The factors such as type, photosensitive fluctuation range, environmental change influence, and set 1000 according to reference value for ambient light irradiation in the application,
Be applicant by numerous experiments, summarize the specific data of this control circuit in practical applications after, selection it is relatively reasonable,
And it is able to achieve the data of preferable effect.
Further, S4: turn on light start execute while, the working condition of main control chip real-time monitoring light compensating lamp, master control
Timer in chip U4 is started to work, and if main control chip U4 monitors that light compensating lamp work surpasses 12 hours, is then transferred to S9, is not surpassed such as
12 hours are spent, then is waited.Light compensating lamp was opened more than 12 hours, and extraneous natural lighting is inevitable varied, at this time main control chip U4
Controllable light compensating lamp is closed, and waste of energy is avoided, and reduces circuit energy consumption.
Present invention has an advantage that compared with the prior art, adding main control module in circuit provided by the invention, setting
Control burning program enter in main control module, supplementary lighting module is controlled with this and is opened or closed in due course, light compensating lamp stroboscopic is avoided, reduce
The power consumption of integrated circuit helps video camera to obtain best monitoring image quality.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (8)
1. a kind of video camera light filling control circuit, the circuit include power module, supplementary lighting module and photosensitive module, feature exists
In, which further includes having main control module, and the power module is connect with main control module, photosensitive module and supplementary lighting module respectively,
The photosensitive module and supplementary lighting module are connect with main control module.
2. video camera light filling control circuit as described in claim 1, which is characterized in that the main control module includes master control core
Piece, the concrete model of the main control chip are as follows: STC15W201S-SOP8.
3. video camera light filling control circuit as described in claim 1, which is characterized in that the power module includes that three ends are steady
Depressor, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the first inductance and the second electricity
Sense；The concrete model of the three terminal regulator are as follows: AMS1117；The input terminal of the three terminal regulator and extraneous DC power supply connect
It connects, the ground terminal ground connection of the three terminal regulator, the output end of the three terminal regulator is connect with main control module；First electricity
One end of appearance is connect with the common end of extraneous DC power supply and three terminal regulator, the other end ground connection of the first capacitor；It is described
One end of second capacitor is connect with the common end of three terminal regulator and main control module, the other end ground connection of second capacitor；Institute
The one end for stating third capacitor is connect with the common end of three terminal regulator and main control module, the other end ground connection of second inductance；
One end of 4th capacitor is connect with the common end of three terminal regulator and main control module, another termination of the 4th capacitor
Ground；One end of first inductance is connect with the common end of three terminal regulator and main control module, the other end of first inductance
It is connect with photosensitive module；One end of second inductance is connect with the common end of extraneous DC power supply and three terminal regulator, described
The other end of second inductance is connect with supplementary lighting module；One end of 4th capacitor and the common end of the second inductance and supplementary lighting module
Connection, the other end ground connection of the 4th capacitor；One end of 5th capacitor and the common end of the second inductance and supplementary lighting module
Connection, the other end ground connection of the 5th capacitor, one end of the 6th capacitor and the common end of the second inductance and supplementary lighting module
Connection, the other end ground connection of the 6th capacitor.
4. video camera light filling control circuit as described in claim 1, which is characterized in that the supplementary lighting module light filling driving unit
With light compensating lamp unit, the light filling driving unit is connect with light compensating lamp unit, and the light compensating lamp unit includes driving chip, institute
State the concrete model of driving chip are as follows: BL9582；The light compensating lamp unit includes one and more than one light emitting diode,
The anode of the light emitting diode is connect with power module, and the cathode of the light emitting diode is connect with light filling driving unit.
5. video camera light filling control circuit as described in claim 1, which is characterized in that the photosensitive module includes photosensitive electricity
Resistance, the photo resistance are Cds photo resistance；The both ends of the photo resistance are connect with power module.
6. a kind of video camera light filling lamp control method, which is characterized in that this method includes following steps:
S1: initialization main control chip；
S2: main control module reads the ambient light parameter G1 of the photosensitive module output at this moment；
S3: judging whether photosensitive module output parameter is less than threshold value, such as less than threshold value, then is transferred to S4, such as larger than threshold value, then returns
S2；
S4: it turns on light；
S5: delay three seconds, main control module read again the ambient light parameter G2 of the photosensitive module output at this moment；
S6:G2 obtains T1 according to reference value plus ambient light；
S7: main control module reads the ambient light parameter G3 of photosensitive module output at this time；
S8: comparing the size of G3 and T1, if G3 is greater than T1, is then transferred to S9, if G3 is less than T1, then returns to S7；
S9: it turns off the light.
7. video camera light filling lamp control method as claimed in claim 6, which is characterized in that the S6:G2 shines plus ambient light
Reference value obtains in T1, and ambient light is 1000 according to reference value.
8. video camera light filling lamp control method as claimed in claim 6, which is characterized in that the S4: turning on light and start execution
Meanwhile the working condition of main control chip real-time monitoring light compensating lamp, the timer in main control chip are started to work, as main control chip is supervised
It measures light compensating lamp work and surpasses 12 hours, be then transferred to S9, be such as less than 12 hours, then wait.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024048.0A CN108933900A (en) | 2018-09-04 | 2018-09-04 | A kind of video camera light filling control circuit and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024048.0A CN108933900A (en) | 2018-09-04 | 2018-09-04 | A kind of video camera light filling control circuit and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108933900A true CN108933900A (en) | 2018-12-04 |
Family
ID=64443291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811024048.0A Pending CN108933900A (en) | 2018-09-04 | 2018-09-04 | A kind of video camera light filling control circuit and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108933900A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111435968A (en) * | 2019-01-15 | 2020-07-21 | 杭州海康威视数字技术股份有限公司 | Camera and control method thereof |
| CN112584056A (en) * | 2019-09-29 | 2021-03-30 | 浙江宇视科技有限公司 | Image pickup method, device, equipment and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696754U (en) * | 2012-01-19 | 2013-01-23 | 迅驰（北京）视讯科技有限公司 | Digital vidicon |
| CN104298116A (en) * | 2014-09-30 | 2015-01-21 | 杭州电子科技大学 | Intelligent home equipment |
| CN105188239A (en) * | 2015-11-06 | 2015-12-23 | 深圳市中电照明股份有限公司 | Integrated intelligent light control lamp |
| DE202016000354U1 (en) * | 2016-01-20 | 2016-05-20 | Zhejiang Sungiant Arts&Crafts Co., Ltd | A wireless controller of the LED Christmas fairy lights and a corresponding LED fairy lights |
| CN205490822U (en) * | 2016-01-06 | 2016-08-17 | 深圳市智安物联科技有限公司 | Infrared HD IP camera |
| CN106910347A (en) * | 2017-04-13 | 2017-06-30 | 合肥圣博瑞科技有限公司 | Electronic police Intelligent supplemental lighting system |
| CN106973241A (en) * | 2017-04-13 | 2017-07-21 | 合肥圣博瑞科技有限公司 | The control method of intelligent bayonet light-supplementing system |
| WO2018107682A1 (en) * | 2016-11-17 | 2018-06-21 | 深圳市光峰光电技术有限公司 | Light source brightness control system, light source system and projection equipment |
| CN209299399U (en) * | 2018-09-04 | 2019-08-23 | 深圳市威特迪科技有限公司 | A kind of video camera light filling control circuit |
-
2018
- 2018-09-04 CN CN201811024048.0A patent/CN108933900A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696754U (en) * | 2012-01-19 | 2013-01-23 | 迅驰（北京）视讯科技有限公司 | Digital vidicon |
| CN104298116A (en) * | 2014-09-30 | 2015-01-21 | 杭州电子科技大学 | Intelligent home equipment |
| CN105188239A (en) * | 2015-11-06 | 2015-12-23 | 深圳市中电照明股份有限公司 | Integrated intelligent light control lamp |
| CN205490822U (en) * | 2016-01-06 | 2016-08-17 | 深圳市智安物联科技有限公司 | Infrared HD IP camera |
| DE202016000354U1 (en) * | 2016-01-20 | 2016-05-20 | Zhejiang Sungiant Arts&Crafts Co., Ltd | A wireless controller of the LED Christmas fairy lights and a corresponding LED fairy lights |
| WO2018107682A1 (en) * | 2016-11-17 | 2018-06-21 | 深圳市光峰光电技术有限公司 | Light source brightness control system, light source system and projection equipment |
| CN106910347A (en) * | 2017-04-13 | 2017-06-30 | 合肥圣博瑞科技有限公司 | Electronic police Intelligent supplemental lighting system |
| CN106973241A (en) * | 2017-04-13 | 2017-07-21 | 合肥圣博瑞科技有限公司 | The control method of intelligent bayonet light-supplementing system |
| CN209299399U (en) * | 2018-09-04 | 2019-08-23 | 深圳市威特迪科技有限公司 | A kind of video camera light filling control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111435968A (en) * | 2019-01-15 | 2020-07-21 | 杭州海康威视数字技术股份有限公司 | Camera and control method thereof |
| CN112584056A (en) * | 2019-09-29 | 2021-03-30 | 浙江宇视科技有限公司 | Image pickup method, device, equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101179789B (en) | Backlight brightness self-adjusting mobile phone and implementing method thereof | |
| CN201927051U (en) | Face identifying device with function of resisting hard light | |
| CN203340336U (en) | LED driving power and light modulation system | |
| CN107072001B (en) | A kind of Intelligent street lamp illuminating system | |
| CN102256066A (en) | Infrared high speed ball and method for intelligently adjusting brightness of infrared lamp by infrared high speed ball | |
| CN108933900A (en) | A kind of video camera light filling control circuit and its control method | |
| CN110234187A (en) | A kind of LED constant current Drive And Its Driving Method | |
| CN106707861A (en) | Display brightness self-adjusting device, method and intelligent wearable device | |
| CN209299399U (en) | A kind of video camera light filling control circuit | |
| CN110324538A (en) | A kind of vehicle mounted infrared camera system | |
| CN205657667U (en) | Light -operated timer | |
| CN210112353U (en) | Security and illumination integrated street lamp system | |
| CN207531123U (en) | A kind of system for adjusting room light | |
| CN215073047U (en) | Intelligent control system for household lighting | |
| CN207475948U (en) | There is the intelligent lamp for reducing pupil light visual impact | |
| CN209930380U (en) | Self-adaptive light supplementing equipment for low-illumination environment video image acquisition | |
| CN205428459U (en) | Intelligence digital information pavilion with photoinduction function | |
| CN213818268U (en) | Intelligent dimming LED system | |
| CN201764315U (en) | Light-operated lamp | |
| CN206741063U (en) | A kind of Salar light-gathering disk automatic light control system | |
| CN208798081U (en) | A kind of high-definition camera IR-CUT control circuit | |
| CN105188196A (en) | LED track lamp with intelligent light sensing and light modulation functions | |
| CN108965677A (en) | A kind of control circuit and control method according to camera picture Mass adjust- ment light filling | |
| CN109605382A (en) | Robot vision image processing system | |
| CN204989687U (en) | Liquid crystal atomizing glass's intelligent control circuit is sent to electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |