CN104280118A - Low illumination level testing tool and control method thereof - Google Patents
Low illumination level testing tool and control method thereof Download PDFInfo
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- CN104280118A CN104280118A CN201310291307.7A CN201310291307A CN104280118A CN 104280118 A CN104280118 A CN 104280118A CN 201310291307 A CN201310291307 A CN 201310291307A CN 104280118 A CN104280118 A CN 104280118A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B35/00—Electric light sources using a combination of different types of light generation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The embodiment of the invention discloses a low illumination level testing tool and a control method of the low illumination level testing tool. The low illumination level testing tool comprises a lighting unit and a control unit, the lighting unit is used for providing a testing light source and comprises an incandescent lamp and an LED lamp, the control unit is used for having control over the brightness of the lighting unit and comprises a power switch and a current adjusting module, the power switch is used for controlling the incandescent lamp and the LED lamp to be powered on and off, and the current adjusting module is used for adjusting the magnitude of current passing through the incandescent lamp and/or the LED lamp. According to the low illumination level testing tool and the control method of the low illumination level testing tool, the control unit can have control over the brightness of the lighting unit conveniently, and a testing environment with a low illumination level can be accurately provided.
Description
Technical field
The embodiment of the present invention relates to video monitoring service field, and more specifically, relates to a kind of low-light (level) testing tool and control method thereof of video monitoring equipment.
Background technology
Existing video monitoring system needs to arrange multiple video camera, and low-light (level) is one of very important index weighing camera capabilities.Illumination measures the unit (Lux) of video camera light sensitivity, and briefly, illumination is exactly the criterion that shooting function photographs image under how dark illumination condition.The minimal illumination of video camera is less, and represent that the light needed is fewer, video camera is also sensitiveer.Certain test minimal illumination value must be noted that lens aperture size, and lens focus is less, and aperture is larger, and the illumination of needs is lower.General video camera can only in the illumination work of more than 2-3Lux, and the moon lighting level video camera can work under 0.1Lux illumination, starlight level video camera is even declared to work under 0.01Lux illumination.
Video camera achieves significant progress in low-light (level), the video camera such as installed under garden, factory building scene at present can under 0.02Lux illumination blur-free imaging, and a lot of video camera can only accomplish 0.1Lux before.The progress of relative camera, have higher requirement to the testing apparatus of low-light (level) and test environment, declare to work under 0.01Lux illumination for starlight level video camera, prior art fast can not build the test environment of 0.01Lux illumination accurately.
Current a lot of producer cannot environment that is virtually reality like reality, usually can only build darkroom, coordinate illuminometer simultaneously, control illumination by the light in darkroom.Darkroom is generally the closed room not having light, configure active 220V incandescent lamp in darkroom, peripheral voltage regulation device, regulate the light and shade of incandescent lamp in darkroom with pressure regulator regulation voltage height, voltage can be transferred to 250V from 0V, and indoor illumination also can from most shadow to the brightest.
Inventor finds that to build the mode application scenarios of low-light (level) very limited by building the mode in darkroom, and darkroom is absolutely necessary for video measurement, but simple and crude darkroom can not the scene of full test low-light (level).And cannot accurately control from vehement lamp illumination, test low-light (level), different requirements just needs long-time commissioning test environment, wastes time and energy at every turn.Incandescent lamp cannot adjust the uniform illumination lower than 0.1Lux in addition.The application scenarios of prior art one cannot adaptive current low-light (level) technical development.
Another design of prior art is inside lamp box, install adjustable fluorescent tube.But also need to coordinate illuminometer craft or computer to regulate, because common lamp luminescence threshold values cannot be controlled, so such lamp box can only adjust the low-light (level) environment of 2-10Lux, cannot testing requirement be met.
Summary of the invention
The embodiment of the present invention provides a kind of low-light (level) testing tool and control method thereof of video monitoring equipment, can provide the various illumination environments of test video camera quickly and easily.
First aspect, provides a kind of low-light (level) testing tool, and this low-light (level) testing tool comprises: lighting unit, for providing testing light source, comprises incandescent lamp and LED; Control module, for controlling the brightness of described lighting unit, control module comprises power switch and current regulating module, and power switch is for controlling the power supply connecting and disconnecting of incandescent lamp and LED, and current regulating module is for regulating the size of current by incandescent lamp and/or LED.
In the first possible implementation of first aspect, described LED is divided into a moon lighting level, starlight level, 0.001Lux level three kinds, can simulate the test scene between 0.001Lux-100Lux.
In the implementation that the second of first aspect is possible, described LED is multi-colored led.
In the third possible implementation of first aspect, described lighting unit is arranged in the box inside of low-light (level) testing tool, is specially the upper surface of casing, lower surface, left surface, right flank and above.
In the 4th kind of possible implementation of first aspect, described current regulating module is specially adjustable potentiometer, Power Management Unit, low pressure difference linear voltage regulator or the circuit based on constant current source light modulation.
Second aspect, provides the control method of low-light (level) testing tool, and this low-light (level) testing tool comprises incandescent lamp, LED and control module, and a control module as early as possible step comprises power switch and current regulating module, and it is characterized in that, the method comprises:
Described power switch controls the connecting and disconnecting of the power supply of described incandescent lamp and LED;
Current regulating module regulates the size of the electric current by incandescent lamp and/or LED.
In the first possible implementation of second aspect, described current regulating module is specially adjustable potentiometer, Power Management Unit, low pressure difference linear voltage regulator or the circuit based on constant current source light modulation.
In the implementation that the second of second aspect is possible, described Power Management Unit passes through the communication bus between processing module, arranges output voltage, realizes the segmentation design of 0.1V, and namely logical superpotential segmentation design realizes the lighting unit of low-light (level).
In conjunction with the first possible implementation of second aspect, in the implementation that the third is possible,
The Voltage Feedback function of described low pressure difference linear voltage regulator use itself, change output voltage, the unlatching of the multi-way switch namely controlled by processing module and disconnection, change resistance value in circuit, thus changing the feedback voltage at FB place, the segmentation design eventually through voltage realizes the lighting unit of low-light (level).
According to embodiments of the invention, power switch can control the connecting and disconnecting of the power supply of described incandescent lamp and LED; Current regulating module can regulate the size of the electric current by incandescent lamp and/or LED.Thus control the brightness of lighting unit easily, the test environment of low-light (level) is provided exactly.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the configuration diagram of the embodiment of the present invention;
Fig. 2 is the testing apparatus schematic diagram that the embodiment of the present invention 1 provides;
Fig. 3 is the testing apparatus schematic diagram that the embodiment of the present invention 2 provides;
Fig. 4 is the schematic diagram of the embodiment of the present invention 3;
Fig. 5 is the schematic diagram of the embodiment of the present invention 4;
Fig. 6 is the schematic diagram of the embodiment of the present invention 5;
Fig. 7 is the schematic diagram of the embodiment of the present invention 6;
Fig. 8 is the schematic diagram of the embodiment of the present invention 7;
Fig. 9 is the testing apparatus schematic diagram that the embodiment of the present invention 8 provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the configuration diagram of the embodiment of the present invention, and this low-light (level) testing tool comprises: lighting unit 10 and control module 20.Wherein, lighting unit 10, for providing testing light source, comprises incandescent lamp 12 and LED 14, and wherein this LED 14 is Multicolor LED lamp, comprises a moon lighting level illumination unit 141, starlight level illumination unit 142 and 0.001Lux level illumination unit 143 further; Control module 20, for controlling the brightness of described lighting unit 10, control module 20 comprises power switch 24 and current regulating module 22, power switch 24 is for controlling the power supply connecting and disconnecting of incandescent lamp 12 and LED 14, and current regulating module 22 is for regulating the size of current by incandescent lamp 12 and/or LED 14.
Further, current regulating module 22 can be an adjustable potentiometer, the base electronic element that adjustable potentiometer to be a kind of adjustable potentiometer be a kind of resistance is adjustable, normally on exposed resistive element, pressed against one or two removable hard contact, the resistance between contact position determination resistive element either end and contact.Between two fixed contacts of resistive element during an additional voltage, by rotating or the sliding system change position of contact on resistive element, between rotary contact with fixed contact, just can obtain one becomes certain relation voltage with moving contact position.
As shown in Figure 2, the lighting unit 10 of the embodiment of the present invention is arranged on the box inside of low-light (level) testing tool, is specially the upper surface of casing, lower surface, left surface, right flank and front surface.Certainly, those skilled in the art according to the actual requirements, can adjust the layout of lighting unit 10 at casing flexibly.
As shown in Figure 3, lighting unit 10 at the concrete layout type of the upper surface of casing is: incandescent lamp 12 is for the brightest, and general brightness can be adjustable from 1Lux to 100Lux, is arranged in the centre of upper surface; Month lighting level illumination unit 141 is evenly arranged in the surrounding of incandescent lamp 12, has 4 altogether, in order to provide a moon lighting level illumination; Starlight level illumination unit 142 is also arranged in the surrounding of incandescent lamp 12, has 16 altogether, in order to provide starlight level illumination; 0.001Lux level illumination unit 143 quantity is maximum, has 30 altogether, in order to provide 0.001Lux level illumination.Other surfaces also can with reference to the light layout similar arrangement of upper surface.
As shown in Figure 4, the illumination control principle of LED is as follows: if control LED by electric current, just can adjust required illumination.What Switch switch can control a certain group of LED opens closedown.Resistance R1-Rn can the luminous quantity of control LED.Because illumination is preferably uniform, so time illumination is lower, LED arrangement needs overstepping the bounds of propriety loose, and ensures quantity.
As shown in Figure 5, one of specific implementation of current regulating module 22 is Power Management Unit (PMU, Power Management Unit), PMU is a kind of special IC that can change output voltage, the communication bus that PMU passes through between processing module is mutual, can arrange output voltage, realize the segmentation design of 0.1V, namely logical superpotential segmentation design realizes the illumination of low-light (level).
As shown in Figure 6, another specific implementation of current regulating module 22 is low pressure difference linear voltage regulator (LDO, Low Dropout Regulator), low pressure difference linear voltage regulator is a kind of integrated circuit of output voltage, the Voltage Feedback function of low pressure difference linear voltage regulator use itself, change output voltage, the unlatching of the multi-way switch namely controlled by processing module and disconnection, change resistance value in circuit, thus change feedback (FB, Feedback) feedback voltage at place, the segmentation design eventually through voltage realizes the lighting unit of low-light (level).
Incorporated by reference to reference Fig. 7 and Fig. 8, another specific implementation of current regulating module 22 is the circuit based on constant current source light modulation, this circuit realizes the lighting unit of low-light (level) by the segmentation of electric current design, according to the principle of AD converter, Vout voltage is: Vout=Vref*D/2^n, according to the formula in circuit theory, have: (Vout – 0)/R2=Iout=Iled, so Iled=Vref*D/(2^n*R2), as can be seen here, LED drive current depends on digital quantity D value, the precision n of ADC, and the size of reference voltage, suppose n=10, 1024 grades of segmentations of electric current can be realized, can the brightness value of lighting unit as required, determine the parameter in circuit, realize the low-level lighting Unit Design based on electric current segmentation.
As shown in Figure 9, camera, in order to place video camera to be tested, is placed in lamp box by video camera putting hole, standard color card is placed on the rear surface of lamp box, now regulates different illumination, just can test the photographic effect under camera low-light (level) quickly and easily.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (9)
1. a low-light (level) testing tool, is characterized in that, this low-light (level) testing tool comprises:
Lighting unit, for providing testing light source, comprises incandescent lamp and LED;
Control module, for controlling the brightness of described lighting unit, control module comprises power switch and current regulating module, and power switch is for controlling the power supply connecting and disconnecting of incandescent lamp and LED, and current regulating module is for regulating the size of current by incandescent lamp and/or LED.
2. device as claimed in claim 1, is characterized in that: described LED is divided into a moon lighting level, starlight level, 0.001Lux level three kinds, can simulate the test scene between 0.001Lux-100Lux.
3. device as claimed in claim 1, is characterized in that: described LED is Multicolor LED lamp.
4. device as claimed in claim 1, is characterized in that: described lighting unit is arranged in the box inside of low-light (level) testing tool, is specially the upper surface of casing, lower surface, left surface, right flank and above.
5. device as claimed in claim 1, is characterized in that: described current regulating module is specially adjustable potentiometer, Power Management Unit, low pressure difference linear voltage regulator or the circuit based on constant current source light modulation.
6. a control method for low-light (level) testing tool, this low-light (level) testing tool comprises incandescent lamp, LED and control module, and a control module as early as possible step comprises power switch and current regulating module, and it is characterized in that, the method comprises:
Described power switch controls the connecting and disconnecting of the power supply of described incandescent lamp and LED;
Current regulating module regulates the size of the electric current by incandescent lamp and/or LED.
7. method as claimed in claim 6, is characterized in that: described current regulating module is specially adjustable potentiometer, Power Management Unit, low pressure difference linear voltage regulator or the circuit based on constant current source light modulation.
8. method as claimed in claim 7, is characterized in that, described Power Management Unit passes through the communication bus between processing module, arranges output voltage, realizes the segmentation design of 0.1V, and namely logical superpotential segmentation design realizes the lighting unit of low-light (level).
9. method as claimed in claim 7, it is characterized in that, the Voltage Feedback function of described low pressure difference linear voltage regulator use itself, change output voltage, the unlatching of the multi-way switch namely controlled by processing module and disconnection, change resistance value in circuit, thus change the feedback voltage at feedback place, the segmentation design eventually through voltage realizes the lighting unit of low-light (level).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291307.7A CN104280118A (en) | 2013-07-11 | 2013-07-11 | Low illumination level testing tool and control method thereof |
| PCT/CN2014/077127 WO2015003530A1 (en) | 2013-07-11 | 2014-05-09 | Low-light testing tool and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310291307.7A CN104280118A (en) | 2013-07-11 | 2013-07-11 | Low illumination level testing tool and control method thereof |
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| CN104280118A true CN104280118A (en) | 2015-01-14 |
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| CN201310291307.7A Pending CN104280118A (en) | 2013-07-11 | 2013-07-11 | Low illumination level testing tool and control method thereof |
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| CN (1) | CN104280118A (en) |
| WO (1) | WO2015003530A1 (en) |
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| CN106090692A (en) * | 2016-07-08 | 2016-11-09 | 唐澄育 | A kind of solar energy Ultrathin portable LED eye protection multi-purpose lamp |
| CN112179619A (en) * | 2020-08-28 | 2021-01-05 | 霸州市云谷电子科技有限公司 | Darkroom detection device and detection method |
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| CN108633154B (en) * | 2018-04-28 | 2024-05-17 | 常州星宇车灯股份有限公司 | High-power low-loss constant-current power supply control module |
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| WO2015003530A1 (en) | 2015-01-15 |
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Application publication date: 20150114 |