CN103376157A - Lamp luminance detecting device - Google Patents
Lamp luminance detecting device Download PDFInfo
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- CN103376157A CN103376157A CN2012101195703A CN201210119570A CN103376157A CN 103376157 A CN103376157 A CN 103376157A CN 2012101195703 A CN2012101195703 A CN 2012101195703A CN 201210119570 A CN201210119570 A CN 201210119570A CN 103376157 A CN103376157 A CN 103376157A
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Abstract
The invention discloses a lamp luminance detecting device. A circuit of the lamp luminance detecting device comprises a phototransistor, a switch tube, an ampere meter, a first adjustable resistor, a second adjustable resistor and a direct-current power source. The ampere meter is connected between the input end of the switch tube and the positive electrode of the direct-current power source in series, the second adjustable resistor is connected between the output end of the switch tube and the negative electrode of the direct-current power source in series, the control end of the switch tube is electrically connected with the input end of the phototransistor, the first adjustable resistor connected with a connecting point in series is electrically connected with the positive electrode of the direct-current power source, and the output end of the phototransistor is electrically connected with the negative electrode of the direct-current power source. The lamp luminance detecting device has the advantages of being small, exquisite and simple in circuit design, good in reliability and the like, is composed of only several small components, is quite small in size, can be carried with people and is low in cost. The cost of the lamp luminance detecting device is only less than ten Yuan.
Description
Technical field
The present invention relates to a kind of illuminance of lamp pick-up unit.
Background technology
Light fixture generally all will check its illumination before dispatching from the factory, and whether the illumination of understanding light fixture requirement up to specification or customer requirement.When detecting illuminance of lamp, usually use special-purpose illuminometer to detect, but this illuminometer is expensive, several thousand yuan at least.
Summary of the invention
Problem to be solved by this invention is to provide a kind of simplicity of design, illuminance of lamp pick-up unit that cost is low.
Technical scheme of the present invention is as follows:
A kind of illuminance of lamp pick-up unit, its circuit comprise phototriode Q2, pipe Q1, reometer V1, the first adjustable resistance R1, the second adjustable resistance R2 and direct supply BT1 open the light; Wherein,
Open the light and be connected in series reometer V1 between the positive pole of the pipe input end of Q1 and direct supply BT1; Open the light and be connected in series the second adjustable resistance R2 between the negative pole of the pipe output terminal of Q1 and direct supply BT1; The control end of managing Q1 that opens the light is electrically connected with the input end of phototriode Q1, and tie point is electrically connected with the positive pole of direct supply BT1 by the first adjustable resistance R1 that is connected in series; The output terminal of phototriode Q1 is connected with the negative electricity of direct supply BT1.
In the described illuminance of lamp pick-up unit, phototriode Q1 is positive-negative-positive phototriode or NPN type phototriode.
In the described illuminance of lamp pick-up unit, the pipe Q2 that opens the light is positive-negative-positive triode or NPN type triode.
Illuminance of lamp pick-up unit provided by the invention, its circuit design is small and exquisite, simple, the advantages such as good reliability, only several little components and parts form, and volume is very little, can carry, and cost is very low also only in ten yuan.
Description of drawings
Fig. 1 is the illuminance of lamp pick-up unit circuit theory diagrams of preferred embodiment;
Fig. 2 is illuminance of lamp detection computations coordinate synoptic diagram; Wherein, ordinate is current value (Tv1), and horizontal ordinate is brightness value (Cq2).
Embodiment
A kind of illuminance of lamp pick-up unit of the present invention, its circuit comprise phototriode Q2, pipe Q1, reometer V1, the first adjustable resistance R1, the second adjustable resistance R2 and direct supply BT1 open the light; Wherein,
Open the light and be connected in series reometer V1 between the positive pole of the pipe input end of Q1 and direct supply BT1; Open the light and be connected in series the second adjustable resistance R2 between the negative pole of the pipe output terminal of Q1 and direct supply BT1; The control end of managing Q1 that opens the light is electrically connected with the input end of phototriode Q1, and tie point is electrically connected with the positive pole of direct supply BT1 by the first adjustable resistance R1 that is connected in series; The output terminal of phototriode Q1 is connected with the negative electricity of direct supply BT1.
In the illuminance of lamp pick-up unit, phototriode Q2 is positive-negative-positive phototriode or NPN type phototriode, and preferred phototriode Q2 is the positive-negative-positive phototriode.
In the illuminance of lamp pick-up unit, the pipe Q1 that opens the light is positive-negative-positive triode or NPN type triode or metal-oxide-semiconductor or one-way SCR.The pipe Q1 that preferably opens the light is NPN type triode; At this moment, the base stage of NPN type triode is to open the light to manage the control end of Q1, and the current collection of NPN type triode very opens the light and manages the input end of Q1, and the emission of NPN type triode is very opened the light and managed the output terminal of Q1.
Illuminance of lamp pick-up unit provided by the invention, its circuit design is small and exquisite, simple, the advantages such as good reliability, only several little components and parts form, and volume is very little, can carry, and cost is very low also only in ten yuan.
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
In the present embodiment, phototriode Q2 is the positive-negative-positive phototriode, and the pipe Q1 that opens the light is NPN type triode
As shown in Figure 1, a kind of illuminance of lamp pick-up unit, its circuit comprise positive-negative-positive phototriode Q2, NPN type triode Q1, reometer V1, the first adjustable resistance R1, the second adjustable resistance R2 and direct supply BT1; Direct supply BT1 provides accessory power supply for the circuit of pick-up unit; Wherein,
The emitter of positive-negative-positive phototriode Q2 is electrically connected with the positive pole of direct supply BT1 by adjustable resistance R1 and switch S 1; The collector of positive-negative-positive phototriode Q2 is connected with the negative electricity of direct supply BT1.The emitter of positive-negative-positive phototriode Q2 is electrically connected with the base stage of the electric connection point of adjustable resistance R1 with NPN type triode Q1; Adjustable resistance R1 is electrically connected with the collector of NPN type triode Q1 by reometer V1 with the electric connection point of switch S 1; The emitter of NPN type triode Q1 is connected with the negative electricity of direct supply BT1 by adjustable resistance R2.Like this, when positive-negative-positive phototriode Q2 received illumination, generation current when electric current reaches when making NPN type triode Q1 conducting, was forming electric current I v1 loop: direct supply BT1-reometer V1-NPN type triode Q1-adjustable resistance R2-direct supply BT1.Then there is electric current to show among the reometer V1.
In the illuminance of lamp pick-up unit, the circuit working principle enters lower:
At first, when needing the test illuminance of lamp, with switch S 1 closure;
Then, positive-negative-positive phototriode Q2 is placed dark place, make electric current I v1 reach the maximum range (the reometer range is generally got 10mA or 50mA for more suitable, should not be excessive, represent with Imax) of V1 reometer by regulating adjustable resistance R2;
Secondly, positive-negative-positive phototriode Q2 is placed (reference ray: the light fixture of known illumination generally than glare light electric torch, represents with Ctest) under the reference ray, making electric current I v1 by adjusting adjustable resistance R1 is 0;
Again secondly, after finishing above-mentioned debugging work, the light of tested light fixture is aimed at positive-negative-positive phototriode Q2, change voltage that A order, and Cq2 light more weak because of the power of positive-negative-positive phototriode Q2 according to light Cq2 (illumination) this moment, the A point voltage is higher, NPN type triode Q1 is more near conducting, and the Iv1 electric current is then larger, near the range of V1; Otherwise Cq2 light is stronger, and the A point voltage is lower, and NPN type triode Q1 is near cut-off, and the Iv1 electric current is then less, is close to 0; And Cq2 illumination and Iv1 curent change are inversely proportional to, and linear;
At last, according to shown in Figure 2, the corresponding measured current Iv1 of tested light illumination Cq2 is read, Cq2=Iv1/Imax * Ctest draws by formula; Wherein, the initial initial point of horizontal ordinate and ordinate is " 0 ", and Iv1 represents measured current, and Imax represents the maximum range electric current, and Ctest represents known reference illumination.
Should be understood that above-mentioned statement for preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (5)
1. illuminance of lamp pick-up unit, it is characterized in that its circuit comprises phototriode (Q2), the pipe (Q1) that opens the light, reometer (V1), the first adjustable resistance (R1), the second adjustable resistance (R2) and direct supply (BT1); Wherein,
Open the light and be connected in series reometer (V1) between the positive pole of the input end of pipe (Q1) and direct supply (BT1); Open the light and be connected in series the second adjustable resistance (R2) between the negative pole of the output terminal of pipe (Q1) and direct supply (BT1); The control end of pipe (Q1) of opening the light is electrically connected with the input end of phototriode (Q1), and tie point is electrically connected with the positive pole of direct supply (BT1) by the first adjustable resistance (R1) that is connected in series; The output terminal of phototriode (Q1) is connected with the negative electricity of direct supply (BT1).
2. illuminance of lamp pick-up unit according to claim 1 is characterized in that, described phototriode (Q1) is the positive-negative-positive phototriode.
3. illuminance of lamp pick-up unit according to claim 1 is characterized in that, described phototriode (Q1) is NPN type phototriode.
4. illuminance of lamp pick-up unit according to claim 1 is characterized in that, the described pipe (Q2) that opens the light is the positive-negative-positive triode.
5. illuminance of lamp pick-up unit according to claim 1 is characterized in that, the described pipe (Q2) that opens the light is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101195703A CN103376157A (en) | 2012-04-20 | 2012-04-20 | Lamp luminance detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101195703A CN103376157A (en) | 2012-04-20 | 2012-04-20 | Lamp luminance detecting device |
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| Publication Number | Publication Date |
|---|---|
| CN103376157A true CN103376157A (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101195703A Pending CN103376157A (en) | 2012-04-20 | 2012-04-20 | Lamp luminance detecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743481A (en) * | 2014-02-20 | 2014-04-23 | 三维通信股份有限公司 | Extremely-low-lost detection-range-adjustable light intensity detection circuit |
| CN104374472A (en) * | 2014-10-28 | 2015-02-25 | 何林 | Ambient light illumination detecting device |
| CN109297592A (en) * | 2018-11-14 | 2019-02-01 | 北京敏视达雷达有限公司 | A kind of method and relevant apparatus of stabilized light source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971046A (en) * | 1973-07-02 | 1976-07-20 | Asahi Kogaku Kogyo Kabushiki Kaisha | Systems for responding to non-uniform scene brightness |
| CN86206441U (en) * | 1986-08-26 | 1987-07-15 | 梁越 | Flash photometric meter |
| CN88200653U (en) * | 1988-01-21 | 1988-10-19 | 广州市广力能源技术开发公司 | Photometer |
-
2012
- 2012-04-20 CN CN2012101195703A patent/CN103376157A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971046A (en) * | 1973-07-02 | 1976-07-20 | Asahi Kogaku Kogyo Kabushiki Kaisha | Systems for responding to non-uniform scene brightness |
| CN86206441U (en) * | 1986-08-26 | 1987-07-15 | 梁越 | Flash photometric meter |
| CN88200653U (en) * | 1988-01-21 | 1988-10-19 | 广州市广力能源技术开发公司 | Photometer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743481A (en) * | 2014-02-20 | 2014-04-23 | 三维通信股份有限公司 | Extremely-low-lost detection-range-adjustable light intensity detection circuit |
| CN103743481B (en) * | 2014-02-20 | 2017-03-15 | 三维通信股份有限公司 | A kind of adjustable light intensity detection circuit of very low cost detection range |
| CN104374472A (en) * | 2014-10-28 | 2015-02-25 | 何林 | Ambient light illumination detecting device |
| CN109297592A (en) * | 2018-11-14 | 2019-02-01 | 北京敏视达雷达有限公司 | A kind of method and relevant apparatus of stabilized light source |
| CN109297592B (en) * | 2018-11-14 | 2021-06-29 | 北京敏视达雷达有限公司 | Method for stabilizing light source and related device |
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Application publication date: 20131030 |