CN103674241A - Photosensitive circuit for detecting photosensitive signal - Google Patents
Photosensitive circuit for detecting photosensitive signal Download PDFInfo
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- CN103674241A CN103674241A CN201310678817.XA CN201310678817A CN103674241A CN 103674241 A CN103674241 A CN 103674241A CN 201310678817 A CN201310678817 A CN 201310678817A CN 103674241 A CN103674241 A CN 103674241A
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Abstract
The invention provides a photosensitive circuit for detecting a photosensitive signal. The photosensitive circuit for detecting the photosensitive signal comprises a photosensitive diode D1, a photosensitive diode D2 and an amplifier U1. The cathode of the photosensitive diode D1 is connected with a power source VCC. The anode of the photosensitive diode D1 is grounded through an adjustable resistor R1 and then is connected to the negative level end V- of the amplifier U1. The cathode of the photosensitive diode D2 is connected with the power source VCC. The anode of the photosensitive diode D2 is connected with the negative input end of the amplifier through a resistor R4. The power source VCC is connected to the positive level end V+ of the amplifier U1 through a resistor R3. The common terminal of the resistor R4 and the photosensitive diode D2 is connected to a grounded resistor R2 through a lead. The positive input end of the amplifier U1 is connected to the common terminal of the resistor R1 and the photosensitive diode D1 through a resistor R5. The common terminal of the resistor R1 and the photosensitive diode D1 is also connected with a grounded capacitor C1 through a lead. By the adoption of the photosensitive circuit for detecting the photosensitive signal, the design and the structure are simple, the difference between two different illumination intensities can be accurately detected, and the detection result is accurate.
Description
Technical field
The present invention relates to a kind of photosensitive circuit that detects photosensor signal, belong to electricity field.
Background technology
Photosensitive circuit can convert light signal to digital signal, realizes analog to digital conversion; The photosensitive circuit in use photodiode in circuit is exported different voltage according to the variation of intensity of illumination, this programme is by this characteristic, realized different illumination intensity has been detected, thereby can detect the power difference of photosensor signal, be same as and regulate different intensities of illumination and regulate required intensity of illumination.
Summary of the invention
The invention provides a kind of photosensitive circuit that detects photosensor signal, by amplifier device as a comparison, power for detection of the intensity of illumination of two zoness of different, realizing illumination detects, thereby can regulate the illumination of zones of different, solved in the past comparatively complicatedly for the testing circuit of two different light, and detected the poor problem of effect.
For solving above-mentioned technical matters, the present invention is by the following technical solutions: a kind of photosensitive circuit that detects photosensor signal, comprise photodiode D1, photodiode D2 and amplifier U1, the negative electrode of photodiode D1 connects power supply VCC, the negative level V-that the anode of described photodiode D1 is connected to amplifier U1 after by adjustable resistance R1 ground connection holds, the negative electrode of described photodiode D2 connects power supply VCC, the anode of described photodiode D2 connects the negative input end of amplifier by resistance R 4, the positive level V+ that described power supply VCC is connected to amplifier U1 by resistance R 3 holds, the common port of described resistance R 4 and photodiode D2 is connected the resistance R 2 of ground connection by wire, the positive input terminal of described amplifier U1 is connected to the common port of resistance R 1 and photodiode D1 by resistance R 5, the common port of described resistance R 1 and photodiode D1 is also connected with the capacitor C 1 of ground connection by wire.
The positive input terminal of described amplifier U1 is also connected with the capacitor C 2 of ground connection.
The negative input end of described amplifier U1 is also connected with the capacitor C 3 of ground connection.
Described resistance R 4 and resistance R 5 resistances equate.
Described amplifier is selected LM324 type amplifier.
Compared with prior art, the invention has the beneficial effects as follows: the photosensitive circuit of this detection photosensor signal of the present invention design, not only simple in structure, and can detect accurately the power of two different illumination intensity, testing result is accurate, effective.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment 1
A kind of photosensitive circuit that detects photosensor signal as shown in Figure 1, comprise photodiode D1, photodiode D2 and amplifier U1, the negative electrode of photodiode D1 connects power supply VCC, the negative level V-that the anode of described photodiode D1 is connected to amplifier U1 after by adjustable resistance R1 ground connection holds, the negative electrode of described photodiode D2 connects power supply VCC, the anode of described photodiode D2 connects the negative input end of amplifier by resistance R 4, the positive level V+ that described power supply VCC is connected to amplifier U1 by resistance R 3 holds, the common port of described resistance R 4 and photodiode D2 is connected the resistance R 2 of ground connection by wire, the positive input terminal of described amplifier U1 is connected to the common port of resistance R 1 and photodiode D1 by resistance R 5, the common port of described resistance R 1 and photodiode D1 is also connected with the capacitor C 1 of ground connection by wire.
In the present embodiment, photodiode D1 and photodiode D2 are positioned at different light areas, intensity of illumination is different, the pressure drop of photodiode D1 and photodiode D2 is also different, the value of V1 and V2 is also different, amplifier U1 is device use as a comparison in circuit, externally conducting under illumination of photodiode D1 and photodiode D2, externally under the effect of power supply VCC, when voltage V2>V1, amplifier U1 forward is saturated, output voltage V, when approaching supply voltage, is high level 1; When voltage V2<V1, amplifier U1 is oppositely saturated, and owing to only having used single external power source VCC power supply, amplifier U1 output voltage V 0=O V, is low level 0; During photodiode D1 conducting, produce voltage V1, R1 changes resistance and can be used for regulating the magnitude of voltage of V1, thereby can meet different testing requirements, obtains different comparative voltages and detects effect; The present embodiment is converted into magnitude of voltage by intensity of illumination, different magnitudes of voltage by comparison photodiode D1 and photodiode D2, can quantitatively detect magnitude of voltage, thereby can compare the intensity of illumination of two zoness of different, be convenient to detect and regulating illumination, by magnitude of voltage is quantitatively detected, comparison illumination detects more direct, accurate, and testing result is accurate, effective, and C1 has the effect of filtering, can reduce interference, improve accuracy of detection.
Embodiment 2
The present embodiment has increased following structure on the basis of embodiment 1: the positive input terminal of described comparer U1 is also connected with the capacitor C 2 of ground connection.
In the present embodiment, capacitor C 2 can be eliminated the interference of voltage V1, improves stability and the accuracy of V1 voltage, thereby guarantees to detect accurately.
Embodiment 3
The present embodiment has increased following structure on the basis of embodiment 1 or embodiment 2: the negative input end of described comparer U1 is also connected with the capacitor C 3 of ground connection.
The effect of the present embodiment capacitor C 3 is identical with capacitor C 2, can effectively eliminate the interference of V2, improves stability and the accuracy of V2 voltage, thereby guarantees to detect accurately.
Embodiment 4
The present embodiment has been done following optimization on the basis of above-mentioned arbitrary embodiment: described resistance R 4 and resistance R 5 resistances equate.
The present embodiment resistance R 4 and resistance R 5 resistances equate, guarantee the conducting simultaneously of the two place circuit, guarantee to detect and can normally carry out, the problem that cannot detect in the time of can be because of photodiode D1 and photodiode D2 different light.
Embodiment 5
Embodiment 5 is optimum embodiment of the present invention
The present embodiment has been done following optimization on the basis of above-mentioned arbitrary embodiment: described comparer is selected LM324 type comparer.
In the present embodiment LM358 type amplifier include two independently, the dual operational amplifier of high-gain, internal frequency compensation, price is low, excellent performance, the gain that can improve signal amplification circuit.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (5)
1. a photosensitive circuit that detects photosensor signal, it is characterized in that: comprise photodiode D1, photodiode D2 and amplifier U1, the negative electrode of photodiode D1 connects power supply VCC, the negative level V-that the anode of described photodiode D1 is connected to amplifier U1 after by adjustable resistance R1 ground connection holds, the negative electrode of described photodiode D2 connects power supply VCC, the anode of described photodiode D2 connects the negative input end of amplifier by resistance R 4, the positive level V+ that described power supply VCC is connected to amplifier U1 by resistance R 3 holds, the common port of described resistance R 4 and photodiode D2 is connected the resistance R 2 of ground connection by wire, the positive input terminal of described amplifier U1 is connected to the common port of resistance R 1 and photodiode D1 by resistance R 5, the common port of described resistance R 1 and photodiode D1 is also connected with the capacitor C 1 of ground connection by wire.
2. a kind of photosensitive circuit that detects photosensor signal according to claim 1, is characterized in that: the positive input terminal of described amplifier U1 is also connected with the capacitor C 2 of ground connection.
3. a kind of photosensitive circuit that detects photosensor signal according to claim 1, is characterized in that: the negative input end of described amplifier U1 is also connected with the capacitor C 3 of ground connection.
4. a kind of photosensitive circuit that detects photosensor signal according to claim 1, is characterized in that: described resistance R 4 and resistance R 5 resistances equate.
5. a kind of photosensitive circuit that detects photosensor signal according to claim 1, is characterized in that: described amplifier is selected LM324 type amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678817.XA CN103674241B (en) | 2013-12-14 | 2013-12-14 | A kind of photosensitive circuit detecting photosensor signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678817.XA CN103674241B (en) | 2013-12-14 | 2013-12-14 | A kind of photosensitive circuit detecting photosensor signal |
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| CN103674241A true CN103674241A (en) | 2014-03-26 |
| CN103674241B CN103674241B (en) | 2015-08-26 |
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| CN201310678817.XA Active CN103674241B (en) | 2013-12-14 | 2013-12-14 | A kind of photosensitive circuit detecting photosensor signal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531815A (en) * | 2016-09-30 | 2017-03-22 | 深圳市磊立捷光电有限公司 | Visible light sensor |
| CN109309490A (en) * | 2018-12-04 | 2019-02-05 | 苏州东剑智能科技有限公司 | Key circuit |
| CN113325749A (en) * | 2021-05-07 | 2021-08-31 | 兰玉华 | Control circuit of protective curtain device of angiography machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6384401B1 (en) * | 1997-06-27 | 2002-05-07 | Caliper Technologies Corp. | Method and apparatus for detecting low light levels |
| CN101769790B (en) * | 2008-12-29 | 2011-11-30 | 达尔科技股份有限公司 | Photosensitive device with range |
| CN102262408A (en) * | 2010-05-24 | 2011-11-30 | 上海光辕新能源科技有限公司 | Accuracy-adaptive solar automatic tracking sensor based on sunlight intensity induction |
| CN203116851U (en) * | 2013-03-28 | 2013-08-07 | 嘉兴市英力电子科技有限公司 | Improved photosensitive sensor circuit |
| CN203745082U (en) * | 2013-12-14 | 2014-07-30 | 成都国蓉科技有限公司 | Photosensitive circuit for detecting photosensitive signals |
-
2013
- 2013-12-14 CN CN201310678817.XA patent/CN103674241B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6384401B1 (en) * | 1997-06-27 | 2002-05-07 | Caliper Technologies Corp. | Method and apparatus for detecting low light levels |
| CN101769790B (en) * | 2008-12-29 | 2011-11-30 | 达尔科技股份有限公司 | Photosensitive device with range |
| CN102262408A (en) * | 2010-05-24 | 2011-11-30 | 上海光辕新能源科技有限公司 | Accuracy-adaptive solar automatic tracking sensor based on sunlight intensity induction |
| CN203116851U (en) * | 2013-03-28 | 2013-08-07 | 嘉兴市英力电子科技有限公司 | Improved photosensitive sensor circuit |
| CN203745082U (en) * | 2013-12-14 | 2014-07-30 | 成都国蓉科技有限公司 | Photosensitive circuit for detecting photosensitive signals |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531815A (en) * | 2016-09-30 | 2017-03-22 | 深圳市磊立捷光电有限公司 | Visible light sensor |
| CN109309490A (en) * | 2018-12-04 | 2019-02-05 | 苏州东剑智能科技有限公司 | Key circuit |
| CN113325749A (en) * | 2021-05-07 | 2021-08-31 | 兰玉华 | Control circuit of protective curtain device of angiography machine |
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| CN103674241B (en) | 2015-08-26 |
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Address after: 610000 No. 2 Tianyu Road, hi tech Zone, Sichuan, Chengdu Patentee after: Rong Rong Technology Co., Ltd. Address before: 610000 No. 2 Tianyu Road, hi tech Zone, Sichuan, Chengdu Patentee before: CHENGDU GUORONG TECHNOLOGY CO., LTD. |
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