CN205067285U - Photoelectric detection system of particulate matter - Google Patents
Photoelectric detection system of particulate matter Download PDFInfo
- Publication number
- CN205067285U CN205067285U CN201520835665.4U CN201520835665U CN205067285U CN 205067285 U CN205067285 U CN 205067285U CN 201520835665 U CN201520835665 U CN 201520835665U CN 205067285 U CN205067285 U CN 205067285U
- Authority
- CN
- China
- Prior art keywords
- cavity
- light
- detection system
- photoelectric detection
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a photoelectric detection system of particulate matter, photoelectric detection system of particulate matter includes: the light source, the measurement light that the light source sent is jeted into in the cavity aslope, the cavity, the relative both sides of cavity have the through -hole, air inlet and gas outlet set up on the cavity, the light reflex device, the light reflex device is fixed on the cavity, make the through -hole becomes the blind hole, jet into measurement light in the cavity makes a round trip to reflect between the light reflex device of each blind hole bottom, the detector, the detector is used for receiving scattering light signal conversion in the cavity is the signal of telecommunication to convey the analytic unit, the analytic unit, the analytic unit is through handling the signal of telecommunication to the content of particulate matter in the interior gas of acquisition cavity. The utility model has the advantages of sensitivity is high, the detection lower limit is low.
Description
Technical field
The utility model relates to particle and detects, and particularly relates to the photoelectric detection system of particle in gas.
Background technology
Due to the reinforcement gradually of the environmental consciousness of people, to dust concentration, the attention rates such as PM2.5 are increasing, also diversified to the method for dust measurement.Traditional weight method, due to complicated operation, has not too been applicable to the occasion of some monitoring in real time.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides a kind of photoelectric detection system of highly sensitive, particle that detection limit is low.
Utility model object of the present utility model is achieved by the following technical programs:
A photoelectric detection system for particle, the photoelectric detection system of described particle comprises:
Light source, the measurement light that described light source sends is injected in cavity obliquely;
Cavity, the relative both sides of described cavity have through hole; Air intake opening and gas outlet are arranged on described cavity;
Light reflection device, described light reflection device is fixed on described cavity, makes described through hole become blind hole; Inject the measurement light roundtrip between the light reflection device of each blind via bottom in described cavity;
Detector, described detector is used for the scattered light signal in the described cavity received to be converted to electric signal, and is sent to analytic unit;
Analytic unit, described analytic unit by the described electric signal of process, thus obtains the content of particle in gas in cavity.
According to the photoelectric detection system of above-mentioned particle, preferably, described cavity is rectangular parallelepiped.
According to the photoelectric detection system of above-mentioned particle, alternatively, the sidewall of the cavity relative with the photosurface of described detector separately has through hole, light emitting devices is fixed on cavity, makes this through hole become blind hole.
According to the photoelectric detection system of above-mentioned particle, preferably, the described through hole separately had is formed at the opening of described cavity.
According to the photoelectric detection system of above-mentioned particle, preferably, the degree of depth of described through hole is greater than 2 with the ratio of internal diameter.
According to the photoelectric detection system of above-mentioned particle, alternatively, described cavity is provided with light-emitting window, and the measurement light in described cavity after roundtrip is from described light-emitting window injection cavity.
According to the photoelectric detection system of above-mentioned particle, preferably, each light reflection device being in described cavity homonymy is the different piece of a light reflection device.
Compared with prior art, the utility model has following beneficial effect:
Under limited volume, increase light path, and it is near to measure the reflected light range finder of light between each light reflection device, improves scattered light intensity, thus improves the sensitivity of pick-up unit, reduce detection limit;
The design of the length-diameter ratio of through hole, effectively prevent due to light reflection device contaminated and produce scattered light to measure adverse effect, further increase sensitivity;
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustrating the technical solution of the utility model, and and are not intended to be construed as limiting protection domain of the present utility model.In figure:
Fig. 1 is the structural drawing of the photoelectric detection system of the particle of the utility model embodiment 2.
Embodiment
Fig. 1 and following description describe Alternate embodiments of the present utility model and how to implement to instruct those skilled in the art and to reproduce the utility model.In order to instruct technical solutions of the utility model, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will in scope of the present utility model.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present utility model in every way.Thus, the utility model is not limited to following Alternate embodiments, and only by claim and their equivalents.
Embodiment 1:
The photoelectric detection system of particle in the gas of the utility model embodiment, in described gas, the photoelectric detection system of particle comprises:
Light source, as laser instrument, be fixed on cavity, the measurement light that light source is sent is injected in cavity obliquely described light source incline;
Cavity, as cuboid cavity, described cavity both ends open, the relative both sides of described cavity have multiple through hole; The degree of depth of through hole is greater than 2 with the ratio of internal diameter, and the degree of depth as through hole is 10mm, and internal diameter is 5mm, and air intake opening and gas outlet are arranged on described cavity;
Light reflection device, as light reflection mirror, described light reflection device is fixed on described cavity, makes described through hole become blind hole, closes the openend away from light source of described cavity simultaneously; The each light reflection device being in described cavity homonymy is the different piece of a light reflection device; Inject the measurement light roundtrip between the light reflection device of each blind via bottom in described cavity obliquely, to measure in cavity multiple reflections back and forth, thus increase light path in the limited volume of cavity, increase accordingly scattered light signal;
Detector, what described detector was fixed on cavity faces the open side of light source, for the scattered light signal in the described cavity received is converted to electric signal, and is sent to analytic unit;
Analytic unit, described analytic unit by the described electric signal of process, thus obtains the content of particle in gas in cavity.
The manufacture method of the photoelectric detection system of the above-mentioned particle of the utility model embodiment, described manufacture method comprises the following steps:
(A1) through hole is processed in the relative both sides of cavity;
(A2) light reflection device is fixed on described cavity, makes each through hole become blind hole;
(A3) light source is fixed on described cavity, the measurement light roundtrip between the light reflection device of each blind via bottom making inclination inject the light source in described cavity to send.
Embodiment 2:
Fig. 1 schematically illustrates the structural drawing of the photoelectric detection system of the particle of the utility model embodiment, and as shown in Figure 1, in described gas, the photoelectric detection system of particle comprises:
Light source 5, as laser instrument, be fixed on cavity, the measurement light that light source is sent is injected in cavity obliquely described light source incline;
Cavity 1, as cuboid cavity, described cavity both ends open, the relative both sides of described cavity have multiple through hole 2, the degree of depth of through hole is greater than 2 with the ratio of internal diameter, and the degree of depth as through hole is 10mm, and internal diameter is 4mm, air intake opening, gas outlet, light-emitting window (be provided with slide with inside and outside isolated chambers, prevent gas leakage) are arranged on described cavity;
Light reflection device 3,4,7, as light reflection mirror, described light reflection device is fixed on described cavity, makes described through hole become blind hole, closes the openend away from light source of described cavity simultaneously; Inject light reflection device 3,7 roundtrip at each blind via bottom of the measurement light in described cavity obliquely, finally penetrate from described light-emitting window.Measure light multiple reflections back and forth in cavity, thus light path is increased in the limited volume of cavity, increase accordingly scattered light signal, some scattered light is directly collected on detector photosurface, and after part is reflected by the light reflection device 4 on the cavity relative with described photosurface, (indirectly) is collected on detector photosurface;
Detector 6, what described detector was fixed on cavity faces the open side of light source, for the scattered light signal in the described cavity received is converted to electric signal, and is sent to analytic unit;
Analytic unit, described analytic unit by the described electric signal of process, thus obtains the content of particle in gas in cavity.
The manufacture method of the photoelectric detection system of the above-mentioned particle of the utility model embodiment, described manufacture method comprises the following steps:
(A1) through hole is processed in the relative both sides of cavity;
(A2) light reflection device is fixed on described cavity, makes each through hole become blind hole;
(A3) light source is fixed on described cavity, the measurement light roundtrip between the light reflection device of each blind via bottom making inclination inject the light source in described cavity to send.
Claims (7)
1. a photoelectric detection system for particle, is characterized in that: the photoelectric detection system of described particle comprises:
Light source, the measurement light that described light source sends is injected in cavity obliquely;
Cavity, the relative both sides of described cavity have through hole; Air intake opening and gas outlet are arranged on described cavity;
Light reflection device, described light reflection device is fixed on described cavity, makes described through hole become blind hole; Inject the measurement light roundtrip between the light reflection device of each blind via bottom in described cavity;
Detector, described detector is used for the scattered light signal in the described cavity received to be converted to electric signal, and is sent to analytic unit;
Analytic unit, described analytic unit by the described electric signal of process, thus obtains the content of particle in gas in cavity.
2. the photoelectric detection system of particle according to claim 1, is characterized in that: described cavity is rectangular parallelepiped.
3. the photoelectric detection system of particle according to claim 1, is characterized in that: the sidewall of the cavity relative with the photosurface of described detector separately has through hole, and light emitting devices is fixed on cavity, makes this through hole become blind hole.
4. the photoelectric detection system of particle according to claim 3, is characterized in that: the described through hole separately had is formed at the opening of described cavity.
5. the photoelectric detection system of particle according to claim 1, is characterized in that: the degree of depth of described through hole is greater than 2 with the ratio of internal diameter.
6. the photoelectric detection system of particle according to claim 1, is characterized in that: described cavity is provided with light-emitting window, and the measurement light in described cavity after roundtrip is from described light-emitting window injection cavity.
7. the photoelectric detection system of particle according to claim 6, is characterized in that: each light reflection device being in described cavity homonymy is the different piece of a light reflection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520835665.4U CN205067285U (en) | 2015-10-26 | 2015-10-26 | Photoelectric detection system of particulate matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520835665.4U CN205067285U (en) | 2015-10-26 | 2015-10-26 | Photoelectric detection system of particulate matter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205067285U true CN205067285U (en) | 2016-03-02 |
Family
ID=55393825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520835665.4U Active CN205067285U (en) | 2015-10-26 | 2015-10-26 | Photoelectric detection system of particulate matter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205067285U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290173A (en) * | 2016-08-09 | 2017-01-04 | 上海禾赛光电科技有限公司 | The detection device and method of gas concentration multiple dimensional distribution |
| CN106769735A (en) * | 2017-01-18 | 2017-05-31 | 西安科技大学 | A kind of apparatus for measuring dust concentration |
| CN113418840A (en) * | 2021-06-22 | 2021-09-21 | 西石(厦门)科技股份有限公司 | Gas detection device and vehicle-mounted tail gas detection system |
-
2015
- 2015-10-26 CN CN201520835665.4U patent/CN205067285U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290173A (en) * | 2016-08-09 | 2017-01-04 | 上海禾赛光电科技有限公司 | The detection device and method of gas concentration multiple dimensional distribution |
| CN106290173B (en) * | 2016-08-09 | 2023-11-24 | 上海禾赛科技有限公司 | Device and method for detecting multidimensional distribution of gas concentration |
| CN106769735A (en) * | 2017-01-18 | 2017-05-31 | 西安科技大学 | A kind of apparatus for measuring dust concentration |
| CN106769735B (en) * | 2017-01-18 | 2022-08-12 | 西安科技大学 | Dust concentration measuring device |
| CN113418840A (en) * | 2021-06-22 | 2021-09-21 | 西石(厦门)科技股份有限公司 | Gas detection device and vehicle-mounted tail gas detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205067285U (en) | Photoelectric detection system of particulate matter | |
| CN204831979U (en) | Binary channels atmosphere raise dust on -line monitoring equipment | |
| CN205826470U (en) | A kind of PM2.5 sensor | |
| CN201000431Y (en) | Smog detecting chamber | |
| CN107016816A (en) | Labyrinth type smoke detector structure and its smoke detection method | |
| CN102608010B (en) | Particulate matter (PM) detecting method and equipment | |
| CN106483051B (en) | A kind of device and mobile terminal for mobile terminal measurement atmosphere particle concentration | |
| CN110595967A (en) | Dust concentration detector | |
| CN204594848U (en) | A kind of monitoring device of atmosphere particle concentration | |
| CN103026201B (en) | Scattered light measuring method | |
| CN203929579U (en) | A kind of binary channels high-flux dust particle sensor | |
| CN201000432Y (en) | Smog detecting chamber | |
| CN202177563U (en) | Device adopting laser scattering method to measure distribution of particles in air | |
| CN204514761U (en) | Laser dust sensor | |
| CN202145178U (en) | Laser dust particle counter and gas buffering device used by the same | |
| CN204882519U (en) | Gaseous detection device | |
| CN201429593Y (en) | Self-cleaning water quality sensor device | |
| CN207575994U (en) | The filter of dust accumulation can be detected automatically | |
| CN103017983A (en) | Capacitor sensing type bag-type dust collector leak detector | |
| CN202854034U (en) | Anti-dewing diffuse sulfur hexafluoride gas sensor | |
| CN107024419A (en) | A kind of PM2.5 sensors | |
| CN205655926U (en) | Sensing system based on slope fiber grating | |
| CN205120535U (en) | Particulate matter sensor | |
| CN207675664U (en) | A kind of laser range finder lens contamination detection device | |
| CN201425570Y (en) | Device for measuring dust concentration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |