CN201803940U - Photoelectric detector - Google Patents
Photoelectric detector Download PDFInfo
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- CN201803940U CN201803940U CN2010205563749U CN201020556374U CN201803940U CN 201803940 U CN201803940 U CN 201803940U CN 2010205563749 U CN2010205563749 U CN 2010205563749U CN 201020556374 U CN201020556374 U CN 201020556374U CN 201803940 U CN201803940 U CN 201803940U
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- photoelectric detector
- photovalve
- component
- photoelectric
- signal amplification
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Abstract
The utility model relates to a photoelectric detector which comprises a photoelectric component and a signal amplifying component that are integrated. The photoelectric detector further comprises an aligning device which is equipped relatively to the photoelectric component and is used for aligning with a light source. The photoelectric detector can effectively eliminate the interferences such as drain current error, noise mixing and gain peak caused by stray capacitance through integrating the photoelectric component with the signal amplifying component. The aligning component is provided at a position which is relative to the photoelectric component. The interference by outer stray light source can be effectively filtered, and the measurement accuracy is improved.
Description
[technical field]
The utility model relates to the surveying instrument field, particularly a kind of photoelectric detector.
[background technology]
The normal photoelectric detector that uses detects through the light intensity behind the colored solutions in traditional water quality on-line detecting system, thereby the method for obtaining each content of material in the tested water quality (as chemical oxygen demand (COD), ammonia nitrogen, each heavy metal species etc.) is a photoelectric colorimetry.Traditional photoelectric detector, in detecting the light intensity process, owing to be vulnerable to the interference of astigmatic or other impurity signals on every side, the degree of accuracy of measurement is lower.
[utility model content]
Based on this, be necessary to provide a kind of photoelectric detector that improves measuring accuracy.
A kind of photoelectric detector comprises integrated photovalve and signal amplification component, also comprises the aiming device that is oppositely arranged and is used for alignment light source with described photovalve.
Preferably, described photovalve is photodiode or phototriode.
Preferably, described photoelectric detector also comprises the pressure-stabilizing constant flow circuit that links to each other with signal amplification component with photovalve and power supply is provided for photovalve and signal amplification component.
Preferably, described aiming device is a light collecting barrel.
Preferably, described photoelectric detector also comprises the convex lens that are arranged between photovalve and the aiming device, and the center of the center of described convex lens and aiming element is on same optical axis.
Above-mentioned photoelectric detector integrates photovalve and signal amplification component, can effectively eliminate the leakage current sum of errors and sneak into the interference that gain spike that noise and stray capacitance cause etc. influences measuring accuracy.At the photovalve relative position aiming element is set, effectively the interference of the extraneous source of stray light of filtering improves measuring accuracy.
[description of drawings]
Fig. 1 is the structural representation of photoelectric detector among the embodiment;
Fig. 2 is the synoptic diagram of photodetector application in water quality monitoring system.
[embodiment]
Below in conjunction with specific embodiment and accompanying drawing the technical solution of the utility model is described in detail.
As shown in Figure 1, among the embodiment, photoelectric detector comprises photovalve and the signal amplification component that is integrated in one, and also comprises with respect to the photovalve setting and is used for the aiming device of alignment light source.The light intensity that photovalve is used for receiving is converted to electric signal; Signal amplification component is used for electrical signal converted is amplified so that detect.Among this embodiment, photovalve can be photodiode or phototriode.The aiming element can be light collecting barrel.Photovalve and signal amplification component are integrated, can effectively eliminate the leakage current sum of errors and sneak into the interference that gain spike that noise and stray capacitance cause etc. influences measuring accuracy.At the photovalve relative position aiming element is set, effectively the interference of the extraneous source of stray light of filtering improves measuring accuracy.
Among this embodiment, above-mentioned photoelectric detector also comprises the pressure-stabilizing constant flow circuit that links to each other with signal amplification component with photovalve, and this pressure-stabilizing constant flow circuit is the operating voltage of the photovalve and the signal amplification component of photoelectric detector with the external power supply voltage transitions.Voltage after this pressure-stabilizing constant flow circuit conversion is 3.6 volts, and maximum output current is 100 milliamperes.Guarantee to provide stable voltage by the pressure-stabilizing constant flow circuit, thereby guarantee stabilized intensity for photovalve.
Among this embodiment, above-mentioned photoelectric detector also comprises the convex lens that are arranged between photovalve and the aiming device, and the center of the center of these convex lens and aiming device is on same optical axis.When the light emitted light beam shines on the photoelectric detector, the relative position of scalable photoelectric detector and light source, utilize the aggregation properties of convex lens, the beam center of assurance light emitted and the center of convex lens are on same straight line, also make beam center with the aiming element the center on same straight line, thereby the beam center that has guaranteed light emitted can better detect the intensity of light like this on the photovalve that is radiated at photoelectric detector, avoid occurring the deviation effects accuracy of detection.
In addition, light source can adopt LED as light emitting source, and LED illumination is mapped to the photovalve of photoelectric detector, by photovalve this intensity of illumination is converted to electric signal again.For guaranteeing that LED sends stable light intensity, can adopt the pressure-stabilizing constant flow source that led light source is powered.By the PWM modulation technique led light source voltage is controlled, can well be prolonged the serviceable life of light source, significantly reduce the number of times of calibration, improve measuring reliability.
Above-mentioned photoelectric detector can be applicable to monitoring water quality on line system, industrial number of articles monitoring etc.To be applied in the monitoring water quality on line system is example, as shown in Figure 2, light source 1 emission light beam filters through optical filter and becomes monochromatic light, form directional light through behind the lens again, the solution that this directional light sees through in the cuvette 2 is absorbed a part, enter the aiming element of photoelectric detector 3 again, seeing through convex lens again shines on the photovalve, photovalve is converted to current signal with this intensity of illumination, pass through the signal amplification circuit processing and amplifying again, detect the size of this current signal by testing circuit, analytical calculation draws the light intensity of solution again, is analyzed according to emitted luminescence intensity and transmitted intensity and calculates content of material in the solution.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a photoelectric detector is characterized in that, comprises integrated photovalve and signal amplification component, also comprises the aiming device that is oppositely arranged and is used for alignment light source with described photovalve.
2. photoelectric detector according to claim 1 is characterized in that, described photovalve is photodiode or phototriode.
3. photoelectric detector according to claim 1 is characterized in that, described photoelectric detector also comprises the pressure-stabilizing constant flow circuit that links to each other with signal amplification component with photovalve and power supply is provided for photovalve and signal amplification component.
4. photoelectric detector according to claim 1 is characterized in that, described aiming device is a light collecting barrel.
5. photoelectric detector according to claim 4 is characterized in that, described photoelectric detector also comprises the convex lens that are arranged between photovalve and the aiming device, and the center of the center of described convex lens and aiming device is on same optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205563749U CN201803940U (en) | 2010-10-09 | 2010-10-09 | Photoelectric detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205563749U CN201803940U (en) | 2010-10-09 | 2010-10-09 | Photoelectric detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201803940U true CN201803940U (en) | 2011-04-20 |
Family
ID=43873439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205563749U Expired - Lifetime CN201803940U (en) | 2010-10-09 | 2010-10-09 | Photoelectric detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201803940U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674897A (en) * | 2013-11-22 | 2014-03-26 | 中国矿业大学 | Light reflex experiment table |
| CN104781640A (en) * | 2012-12-20 | 2015-07-15 | 株式会社阿尔发 | Photosensor lens |
-
2010
- 2010-10-09 CN CN2010205563749U patent/CN201803940U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781640A (en) * | 2012-12-20 | 2015-07-15 | 株式会社阿尔发 | Photosensor lens |
| CN104781640B (en) * | 2012-12-20 | 2017-07-28 | 株式会社阿尔发 | The controlling device for doors of photoelectric transducer element and vehicle |
| CN103674897A (en) * | 2013-11-22 | 2014-03-26 | 中国矿业大学 | Light reflex experiment table |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110420 |
|
| CX01 | Expiry of patent term |