CN201828499U - Photoelectric conversion device - Google Patents
Photoelectric conversion device Download PDFInfo
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- CN201828499U CN201828499U CN2010205444398U CN201020544439U CN201828499U CN 201828499 U CN201828499 U CN 201828499U CN 2010205444398 U CN2010205444398 U CN 2010205444398U CN 201020544439 U CN201020544439 U CN 201020544439U CN 201828499 U CN201828499 U CN 201828499U
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- photoelectric conversion
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- conversion device
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Abstract
The utility model discloses a photoelectric conversion device, wherein a photoelectric conversion unit comprises a semiconductor laser light source emitting a laser beam, and an incident light channel, an illumination area, an emergent light channel and a light trap are sequentially arranged in the heading direction of the laser beam emitting by the laser light source; a spherical reflector and a semiconductor photodetector pass through the illumination area, are arranged in the direction vertical to a light path and are respectively arranged at two sides of the illumination area; the photodetector is connected with an amplifying circuit; an air inlet connecting pipe and an air outlet connecting pipe are symmetrically arranged at two sides of the illumination area; the air inlet connecting pipe is arranged at the upper end of the illumination area, and the air outlet connecting pipe is arranged at the lower end of the illumination area; the caliber of the air inlet connecting pipe is smaller than that of the air outlet connecting pipe; and a pipe hole of the air inlet connecting pipe is slightly flat. The photoelectric conversion device is reasonable in structure, good in measurement stability, high in sensitivity and precision, and easy to maintain.
Description
Technical field
The utility model relates to a kind of photoelectric converting device, is specifically related to a kind of sensor of dust concentration photoelectric conversion device.
Background technology
Present measurement for dust concentration, mainly contain following several mode: a kind of employing dust sampler, utilize the heavy method principle of filter membrane meter: the dust laden air that extracts certain volume, dust is trapped on the filter membrane, according to the dust quality that increases on the filter membrane, utilize formula to calculate dust mass concentration in the unit volume air again.This mode not only is not easy to operation, and can not continuous coverage.A kind of is the direct-reading dust gauge, mainly utilize principles such as indirect method such as light scattering, the absorption of β source, utilize sampling thief to demarcate, but the dust concentration value that instant playback is measured is come, but the working time is short, the measurement number of times is limited, can not can only use as the portable dust gauge of routine the dust continuous monitoring.
But but develop a kind of continuous detecting direct-reading dust concentration sensor continuous detecting dust concentration now.
The patent No. is " CN200620125097.X ", patent name " a kind ofly carries out long-time continuous monitoring and instant playback dust concentration value to dust concentration, converts the sensor that frequency signal is exported simultaneously to for the Chinese patent of " sensor of dust concentration " disclose.Structure is made up of shell, dust sampling head, dust room, blower fan, photoelectric receiving arrangement; " " photoelectric receiving arrangement comprises light source base, light source shelf, light source sealing shroud, photomultiplier ".The sensor of dust concentration of this patent disclosure can be implemented in the continuous working under the dust atmosphere, but because of it uses photomultiplier, need provide higher voltage during use, and this has constituted potential safety hazard in the dust work place.
Photoelectric conversion device is the important component part in the sensor of dust concentration, how to make its working stability, highly sensitive, is to make great efforts the problem that solves always.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming of the prior art, and a kind of stable sensitivity height is provided, and small and exquisite photoelectricity converter device rational in infrastructure.
A kind of photoelectric conversion device of the present utility model, described photoelectric conversion unit comprises a semiconductor laser light resource that sends laser beam, send in this LASER Light Source on the working direction of light beam, be provided with incident light passage, area of illumination, emergent light passage, light trapping successively; Be provided with spherical reflector, optical semiconductor detector through area of illumination and with the light path vertical direction, spherical reflector and photo-detector are respectively in the both sides of area of illumination, and photo-detector is connected with an amplifying circuit; Described air inlet tube and outgoing gas connection tube are symmetrically distributed in the both sides of area of illumination, and air inlet tube is in the upper end of area of illumination, and outgoing gas connection tube is in the lower end of area of illumination, and the caliber of described air inlet tube is less than the caliber of outgoing gas connection tube; The pore of described air inlet tube is flat.
In preferred embodiment of the utility model, described photoelectric conversion device is provided with a cavity that communicates with the external world, and this cavity is used to hold spherical reflector, is convenient to the dismounting of spherical reflector.
In preferred embodiment of the utility model, the power of described LASER Light Source is the 2-3.5 milliwatt.
In preferred embodiment of the utility model, described semiconductor photo detector is high sensitive photodiode.
In preferred embodiment of the utility model, described light trapping inwall is a black.
The utility model is work like this, and dust laden air enters from air inlet tube, through area of illumination, discharges at outgoing gas connection tube.LASER Light Source enters from input path, through area of illumination, enters light trapping from emitting light path.When light when area of illumination shines dust granules in the dust laden air, can reflect, part refract light can directly reflect the photosensitive area that enters photo-detector, another part can be refracted on the spherical reflector, by specular reflective mirrors refract light is reflected the photosensitive area that enters photo-detector again, photo-detector is changed to voltage signal with the light signal dress that receives and is transferred to amplifying circuit.
The utility model is compared its advantage with the prior art scheme:
1), the caliber of outgoing gas connection tube is greater than the caliber of air inlet tube, forms approximate infundibulate, pushes away long-pendingly in area of illumination thereby reduce dust granules in the dust laden air, and then can reduce maintenance times.The pore of air inlet tube is flat, and the particle in the dust laden air is forced shaping, makes dust granules evenly distribute in tube chamber, improves measuring accuracy and range ability.
2), spherical reflector is detachable the installation, make things convenient for like this spherical reflector pulled down cleaning.
3), the inwall of light trapping all is black, but absorbing light, no reflection events can not produce interference.
4), photodetector selects high sensitive photodiode for use, and is highly sensitive, can use dc amplification circuit, stable do not have a drift.
To sum up, photoelectricity converter device of the present utility model, rational in infrastructure, measurement stability is good, sensitivity precision height, easy care.
Description of drawings
Fig. 1 is a kind of example structure synoptic diagram of the utility model;
Fig. 2 is Fig. 1 vertical view cutaway drawing;
Fig. 3 is the sectional view of air inlet tube in the prior art;
Fig. 4 is the sectional view of air inlet tube in the present embodiment.
Wherein, 110 is LASER Light Source; 120 is total mount pad; 130 is air inlet tube; 140 is outgoing gas connection tube; 150 is photodetector; 160 is amplifying circuit; 170 is the light source mount pad; 180 is spherical reflector; 121 is emitting light path; 122 is input path; 123 is light trapping; 161 is circuit board; 162 is the circuit mount pad; 131 is pore; 132 is tube wall; 131 " be the pore of prior art; 132 " be tube wall of the prior art.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection domain of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.
In conjunction with shown in Figure 2, total mount pad 120 is a rectangular structure as Fig. 1, and there is a circular space centre as area of illumination, and LASER Light Source 110 is installed in the left end mounting hole of total mount pad 120, is fixed on total mount pad by mount pad 170, can connect by screw.Total mount pad 120 right-hand members are equipped with a black object, form light trapping.Be connected to air inlet tube 130 in total mount pad 120 upper end holes, be connected to outgoing gas connection tube 140 in the following stomidium, described air inlet tube 130, outgoing gas connection tube 140 all extend inward into the light area.In total mount pad 120 front end mounting holes spherical reflector 180 is installed, photodetector 150 is installed in the mounting hole of rear end, photodetector 150 is connected with amplifying circuit 160.Circuit board 161 is fixedly connected on the back of total mount pad 120 by circuit mount pad 162.
The photoelectric conversion device of present embodiment is work like this, and dust laden air enters from air inlet tube 130, through area of illumination, discharges at outgoing gas connection tube 140.LASER Light Source 110 enters from input path 122, through area of illumination, enters light trapping 123 from emitting light path 121.When light when area of illumination shines dust granules in the dust laden air, can reflect, part refract light can directly reflect the photosensitive area that enters photo-detector 150, another part can be refracted on the spherical reflector 180, by specular reflective mirrors 180 refract light is reflected the photosensitive area that enters photo-detector 150 again, photo-detector is changed to voltage signal with the light signal dress that receives and is transferred to amplifying circuit 160.
The caliber of outgoing gas connection tube 140 forms approximate infundibulate greater than the caliber of air inlet tube 130, and is long-pending thereby the dust granules in the minimizing dust laden air pushes away in area of illumination, and then can reduce maintenance times.
As shown in Figure 3, dust laden air is rotating and enters admission line, the pore 131 of air inlet tube 130 of the prior art under the effect of sampling pump, and " rounded; as thereby to make dust granules closeer in the tube chamber central distribution; as peripherally to distribute laxlyer, skewness can influence measuring accuracy like this; simultaneously when dust concentration acquires a certain degree; overstocked because of tube chamber center dust density, feasiblely can't continue measurement, thereby range ability is little.
As shown in Figure 4, the pore 631 of the air inlet tube 63 of present embodiment is flat, dust granules is clashed in tube wall, thereby change its regularity of distribution, and dust granules is evenly distributed, thereby improves measuring accuracy, improves range ability simultaneously.
As a preferential embodiment of the present utility model, the inwall of light trapping 123 all is a black, but absorbing light, and no reflection events can not produce interference.
As a more excellent embodiment of the present utility model, photodetector 150 can be selected high sensitive photodiode for use.
As an optimum embodiment of the present utility model, LASER Light Source 110 is optional to be the 2-3.5 milliwatt with power.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the utility model; variation or the replacement that can expect without creative work all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.
Claims (5)
1. photoelectric conversion device, it is characterized in that: described photoelectric conversion unit comprises a semiconductor laser light resource that sends laser beam, send in this LASER Light Source on the working direction of light beam, be provided with incident light passage, area of illumination, emergent light passage, light trapping successively; Be provided with spherical reflector, optical semiconductor detector through area of illumination and with the light path vertical direction, spherical reflector and photo-detector are respectively in the both sides of area of illumination, and photo-detector is connected with an amplifying circuit; Described air inlet tube and outgoing gas connection tube are symmetrically distributed in the both sides of area of illumination, and air inlet tube is in the upper end of area of illumination, and outgoing gas connection tube is in the lower end of area of illumination, and the caliber of described air inlet tube is less than the caliber of outgoing gas connection tube; The pore of described air inlet tube is offset flat shape.
2. a kind of photoelectric conversion device according to claim 1 is characterized in that: described photoelectric conversion device is provided with a cavity that communicates with the external world, and this cavity is used to hold spherical reflector, is convenient to the dismounting of spherical reflector.
3. a kind of photoelectric conversion device according to claim 2 is characterized in that: the power of described LASER Light Source is the 2-3.5 milliwatt.
4. a kind of photoelectric conversion device according to claim 1 is characterized in that: described semiconductor photo detector is high sensitive photodiode.
5. a kind of photoelectric conversion device according to claim 1 is characterized in that: described light trapping and emergent light inwall are black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205444398U CN201828499U (en) | 2010-09-27 | 2010-09-27 | Photoelectric conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205444398U CN201828499U (en) | 2010-09-27 | 2010-09-27 | Photoelectric conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828499U true CN201828499U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205444398U Expired - Lifetime CN201828499U (en) | 2010-09-27 | 2010-09-27 | Photoelectric conversion device |
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| Country | Link |
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| CN (1) | CN201828499U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004069A (en) * | 2010-09-27 | 2011-04-06 | 常熟市矿山机电器材有限公司 | Photoelectric conversion device |
| CN107219115A (en) * | 2017-07-27 | 2017-09-29 | 中绿环保科技股份有限公司 | Pretreatment system in extraction-type particulate matter on-line monitoring system |
-
2010
- 2010-09-27 CN CN2010205444398U patent/CN201828499U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004069A (en) * | 2010-09-27 | 2011-04-06 | 常熟市矿山机电器材有限公司 | Photoelectric conversion device |
| CN102004069B (en) * | 2010-09-27 | 2012-09-19 | 常熟市矿山机电器材有限公司 | Photoelectric conversion device |
| CN107219115A (en) * | 2017-07-27 | 2017-09-29 | 中绿环保科技股份有限公司 | Pretreatment system in extraction-type particulate matter on-line monitoring system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |
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| CX01 | Expiry of patent term |