CN203259168U - Special optical signal detection circuit - Google Patents
Special optical signal detection circuit Download PDFInfo
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- CN203259168U CN203259168U CN 201320222810 CN201320222810U CN203259168U CN 203259168 U CN203259168 U CN 203259168U CN 201320222810 CN201320222810 CN 201320222810 CN 201320222810 U CN201320222810 U CN 201320222810U CN 203259168 U CN203259168 U CN 203259168U
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Abstract
The utility model discloses a special optical signal detection circuit comprising a photoelectric conversion module. An output end of the photoelectric conversion module is sequentially connected with a rectification module, a voltage comparison module, and a detection output module. The utility model is advantageous in that the photoelectric conversion device having the special photoelectric characteristic can be used to detect the optical signals, and can be used for processing the signals by the photoelectric conversion module, the rectification module, the voltage comparison module, and the detection output module, and can be used to detect the optical signals in the predetermined frequency band; the circuit linear accuracy is good, the dynamic characteristic is excellent, the costs are low, and the stability is high; and the device can be widely used for detecting the optical signals in the daily life or the scientific researches.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to a kind of optical detection circuit.
Background technology
Detection for light has a wide range of applications in fields such as scientific research and daily lifes.The conventional method of optical signal detecting is by electrooptical device light signal to be converted into electric signal, and then amplifies by circuit, changes this electric signal into accessible electric signal.But at present optical detection circuit can not be distinguished each frequency range light signal, is subject to easily the interference of various signals, is subject to easily the interference of daylight lamp signal or is submerged in the various noises such as the detection of low level light signal.
The utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model provides a kind of circuit that can detect the characteristic frequency light signal.
The technical scheme that the utility model adopts is:
A kind of certain optical signals testing circuit, it comprises photoelectric conversion module, the output terminal of described photoelectric conversion module is connected with rectification module, voltage comparison module and detection output module in turn.
Further, it also comprises the signal amplification module between the input end of the output terminal that is connected in photoelectric conversion module and rectification module.
Further, described photoelectric conversion module comprises successively power supply, the first resistance, the second resistance, the 3rd resistance and the ground of serial connection, and described the second resistance also is connected to the first electric capacity; Described photoelectric conversion module also comprises photodiode, and the negative pole of described photodiode is connected in the node between the first resistance and the second resistance, the plus earth of described photodiode; Node between described the second resistance and the 3rd resistance is connected with the input end of signal amplification module.
Further, described signal amplification module is operational amplification circuit, comprises operational amplifier, the 4th resistance and the 5th resistance; The positive pole of described operational amplifier is connected with the output terminal of photoelectric conversion module, the negative pole of described operational amplifier is by the 4th resistance eutral grounding, the output terminal of described operational amplifier is connected to the negative pole of operational amplifier by the 5th resistance, and the output terminal of described operational amplifier is connected with the input end of rectification module.
Further, the resistance of described the 4th resistance is 1.5k Europe, and the resistance of described the 5th resistance is 270k Europe.
Further, described rectification module comprises successively the second electric capacity, diode, the 6th resistance and the ground of serial connection, and described the 6th resistance also is connected to filter capacitor, and the node between described diode and the 6th resistance is connected with the input end of voltage comparison module.
Further, described the 6th resistance is 50k Europe, and described filter capacitor appearance value is 0.1 μ F.
Further, described voltage comparison module comprises voltage comparator, the 7th resistance, the 8th resistance; The positive pole of described voltage comparator is connected to power supply by the 7th resistance, and the positive pole of described voltage comparator is by the 8th resistance eutral grounding, and the negative pole of described voltage comparator is connected with the output terminal of rectification module; The output terminal of described voltage comparator is connected with the input end that detects output module.
Further, described detection output module comprises triode, the 9th resistance, the tenth resistance and signal output part; The base stage of described triode is connected with the output terminal of voltage comparison module, the base stage of described triode is connected to power supply by the 9th resistance, the grounded emitter of described triode, the collector of described triode is connected to power supply by the tenth resistance, and the collector of described triode is connected to signal output part.
The beneficial effects of the utility model are: the utility model is by having the electrooptical device sensed light signal of specific light electrical properties, and by photoelectric conversion module, rectification module, voltage comparison module, detection output module processing signals, can detect the special frequency channel light signal, and having the advantage that the circuit linear precision is good, dynamic perfromance is good, cost is low, degree of stability is high, the specific light that can be widely used in daily life or the scientific research detects.
In addition, the utility model also comprises the signal amplification module, can realize to faint optical signal corresponding, amplify and process.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Fig. 1 is the structured flowchart of the utility model basic conception;
Fig. 2 is the circuit structure diagram of a kind of embodiment of the utility model.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 1 is the system chart of a kind of embodiment of the utility model, a kind of certain optical signals testing circuit, and it comprises photoelectric conversion module, the output terminal of described photoelectric conversion module is connected with rectification module, voltage comparison module and detection output module in turn; A kind of certain optical signals testing circuit also comprises the signal amplification module between the input end of the output terminal that is connected in photoelectric conversion module and rectification module.
The ultimate principle of this circuit design is: the photoelectric conversion module receiving optical signals also is converted to ac signal with light signal, signal amplification circuit amplifies ac signal, rectification circuit transfers ac signal to dc signal, voltage comparator circuit compares dc signal and specific voltage electric signal, if this dc signal greater than/less than the specific voltage signal, then detecting output module output corresponding signal.Circuit can be controlled the responding range of sensed light signal frequency by regulating scope, the multiple of conditioning signal amplifying circuit and the specific voltage signal of regulation voltage comparator circuit of photoelectric conversion module sensed light signal.
Fig. 2 is the circuit structure diagram of a kind of embodiment of the utility model.
Described photoelectric conversion module comprises successively power Vcc, the first resistance 21, the second resistance 22, the 3rd resistance 23 and the ground of serial connection, and described the second resistance 22 also is connected to the first electric capacity 31; Described photoelectric conversion module also comprises photodiode 10, and the negative pole of described photodiode 10 is connected in the node between the first resistance 21 and the second resistance 22, the plus earth of described photodiode 10; Node between described the second resistance 22 and the 3rd resistance 23 is connected with the input end of signal amplification module.
Wherein, can select according to the needs of light signal to be measured the photodiode of different spectral response characteristics, for obtaining maximum photocurrent, should select spectral response characteristic to meet the photodiode of spectrum to be measured, it is 2CU2A that present embodiment is selected photodiode 10 models, its maximum operating voltage 10V, dark current is less than 0.1 μ A, photocurrent is greater than 30 μ A, and sensitivity is greater than 0.5 μ A/ μ W, and the peak response wavelength is greater than 0.88 μ m.
Further, the signal amplification module is operational amplification circuit, comprises operational amplifier 40, the 4th resistance 24 and the 5th resistance 25; The positive pole of described operational amplifier 40 is connected with the output terminal of photoelectric conversion module, the negative pole of described operational amplifier 40 is by the 4th resistance 24 ground connection, the output terminal of described operational amplifier 40 is connected to the negative pole of operational amplifier 40 by the 5th resistance 25, and the output terminal of described operational amplifier 40 is connected with the input end of rectification module.
Wherein, by regulating the resistance of the 4th resistance 24 and the 5th resistance 25, the enlargement factor that can regulate signal amplification circuit, the resistance of present embodiment the 4th resistance 24 is 1.5k Europe, the resistance of described the 5th resistance 25 is 270k Europe.
Further, rectification module comprises successively the second electric capacity 32, diode 50, the 6th resistance 26 and the ground of serial connection, and described the 6th resistance 26 also is connected to filter capacitor 33, and the node between described diode 50 and the 6th resistance 26 is connected with the input end of voltage comparison module.
Wherein, the characteristic that diode utilizes its forward conduction, oppositely ends is carried out half-wave rectification to AC signal, and arrives voltage comparison module through the rectification circuit output direct current signal of the 6th resistance 26 and filter capacitor 33 compositions.Among this embodiment, the resistance of the 6th resistance 26 is 50k Europe, and filter capacitor 33 appearance values are 0.1 μ F.Obviously, rectification module also can adopt other rectification circuit, such as bridge rectifier circuit.
Further, voltage comparison module comprises voltage comparator 60, the 7th resistance 27, the 8th resistance 28; The positive pole of described voltage comparator 60 is connected to power Vcc by the 7th resistance 27, and the positive pole of described voltage comparator 60 is by the 8th resistance 28 ground connection, and the negative pole of described voltage comparator 60 is connected with the output terminal of rectification module; The output terminal of described voltage comparator 60 is connected with the input end that detects output module.
Wherein, by regulating the resistance of the 7th resistance 27 and the 8th resistance 28, can regulate the magnitude of voltage of specific voltage signal.Among this embodiment, the resistance of the 7th resistance 27 is 100k Europe, and the resistance of the 8th resistance is 10k Europe.When from the magnitude of voltage of the direct current signal of rectification module during less than the magnitude of voltage of specific voltage signal, voltage comparator 60 output high level signals are to detecting output module; When from the magnitude of voltage of the direct current signal of rectification module during greater than the magnitude of voltage of specific voltage signal, voltage comparator 60 output low level signals are to detecting output module.
Further, described detection output module comprises triode 70, the 9th resistance 29, the tenth resistance 20 and signal output part Vout; The base stage of described triode 70 is connected with the output terminal of voltage comparison module, the base stage of described triode 70 is connected to power Vcc by the 9th resistance 29, the grounded emitter of described triode 70, the collector of described triode 70 is connected to power Vcc by the tenth resistance 20, and the collector of described triode 70 is connected to signal output part Vout.
Wherein, the resistance of the 9th resistance 29 is 22k Europe among this embodiment.When the output signal of voltage comparison module was high level, triode 70 was in conducting state, signal output part Vout output low level; When the output signal of voltage comparison module was low level, triode 70 was in cut-off state, and signal output part Vout exports high level.Therefore, can determine whether the certain optical signals irradiation.
More than be that better enforcement of the present utility model is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of the utility model spirit, the distortion that these are equal to or replace all is included in the application's claim limited range.
Claims (9)
1. a certain optical signals testing circuit is characterized in that it comprises photoelectric conversion module, and the output terminal of described photoelectric conversion module is connected with rectification module, voltage comparison module and detection output module in turn.
2. a kind of certain optical signals testing circuit according to claim 1 is characterized in that, it also comprises the signal amplification module between the input end of the output terminal that is connected in photoelectric conversion module and rectification module.
3. a kind of certain optical signals testing circuit according to claim 2 is characterized in that, described photoelectric conversion module comprises successively power supply, the first resistance, the second resistance, the 3rd resistance and the ground of serial connection, and described the second resistance also is connected to the first electric capacity; Described photoelectric conversion module also comprises photodiode, and the negative pole of described photodiode is connected in the node between the first resistance and the second resistance, the plus earth of described photodiode; Node between described the second resistance and the 3rd resistance is connected with the input end of signal amplification module.
4. according to claim 2 or the described a kind of certain optical signals testing circuit of 3 any one, it is characterized in that described signal amplification module is operational amplification circuit, comprise operational amplifier, the 4th resistance and the 5th resistance; The positive pole of described operational amplifier is connected with the output terminal of photoelectric conversion module, the negative pole of described operational amplifier is by the 4th resistance eutral grounding, the output terminal of described operational amplifier is connected to the negative pole of operational amplifier by the 5th resistance, and the output terminal of described operational amplifier is connected with the input end of rectification module.
5. a kind of certain optical signals testing circuit according to claim 4 is characterized in that, the resistance of described the 4th resistance is 1.5k Europe, and the resistance of described the 5th resistance is 270k Europe.
6. according to claim 1,2,3 or 5 described a kind of certain optical signals testing circuits, it is characterized in that, described rectification module comprises successively the second electric capacity, diode, the 6th resistance and the ground of serial connection, described the 6th resistance also is connected to filter capacitor, and the node between described diode and the 6th resistance is connected with the input end of voltage comparison module.
7. a kind of certain optical signals testing circuit according to claim 6 is characterized in that, described the 6th resistance is 50k Europe, and described filter capacitor appearance value is 0.1 μ F.
8. according to claim 1,2,3 or 5 described a kind of certain optical signals testing circuits, it is characterized in that described voltage comparison module comprises voltage comparator, the 7th resistance, the 8th resistance; The positive pole of described voltage comparator is connected to power supply by the 7th resistance, and the positive pole of described voltage comparator is by the 8th resistance eutral grounding, and the negative pole of described voltage comparator is connected with the output terminal of rectification module; The output terminal of described voltage comparator is connected with the input end that detects output module.
9. according to claim 1,2,3 or 5 described a kind of certain optical signals testing circuits, it is characterized in that described detection output module comprises triode, the 9th resistance, the tenth resistance and signal output part; The base stage of described triode is connected with the output terminal of voltage comparison module, the base stage of described triode is connected to power supply by the 9th resistance, the grounded emitter of described triode, the collector of described triode is connected to power supply by the tenth resistance, and the collector of described triode is connected to signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222810 CN203259168U (en) | 2013-04-27 | 2013-04-27 | Special optical signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222810 CN203259168U (en) | 2013-04-27 | 2013-04-27 | Special optical signal detection circuit |
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| CN203259168U true CN203259168U (en) | 2013-10-30 |
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| CN 201320222810 Expired - Fee Related CN203259168U (en) | 2013-04-27 | 2013-04-27 | Special optical signal detection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772131A (en) * | 2016-12-30 | 2017-05-31 | 北京煜邦电力技术股份有限公司 | A kind of indicator lamp detection means |
| CN106936412A (en) * | 2017-01-20 | 2017-07-07 | 同济大学 | Light sensation detection circuit based on operational amplifier |
| CN110994981A (en) * | 2019-11-13 | 2020-04-10 | 江苏弘历电气有限公司 | Non-contact type high-voltage and large-current direct current module |
-
2013
- 2013-04-27 CN CN 201320222810 patent/CN203259168U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772131A (en) * | 2016-12-30 | 2017-05-31 | 北京煜邦电力技术股份有限公司 | A kind of indicator lamp detection means |
| CN106936412A (en) * | 2017-01-20 | 2017-07-07 | 同济大学 | Light sensation detection circuit based on operational amplifier |
| CN106936412B (en) * | 2017-01-20 | 2020-08-14 | 同济大学 | Light sense detection circuit based on operational amplifier |
| CN110994981A (en) * | 2019-11-13 | 2020-04-10 | 江苏弘历电气有限公司 | Non-contact type high-voltage and large-current direct current module |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20140427 |