CN205157382U - Particulate matter concentration measurement appearance - Google Patents
Particulate matter concentration measurement appearance Download PDFInfo
- Publication number
- CN205157382U CN205157382U CN201520857216.XU CN201520857216U CN205157382U CN 205157382 U CN205157382 U CN 205157382U CN 201520857216 U CN201520857216 U CN 201520857216U CN 205157382 U CN205157382 U CN 205157382U
- Authority
- CN
- China
- Prior art keywords
- light source
- lens
- detection system
- photoelectric detection
- transmission device
- 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
Abstract
The utility model relates to a particulate matter concentration measurement appearance belongs to dust concentration and measures the field. Constitute including light source, transmission lens, receiver lens, optical signal transmission device, photoelectric detection system and optical element dust protector, light source, transmission lens, receiver lens, optical signal transmission device and photoelectric detection system arrange in proper order, optical element dust protector with launch lens and receiver lens and be connected, be provided with transmission device 0 and TTL transmission device 1 on the light source, the optical signal transmission device both ends respectively with receiver lens and photoelectric detection system coupling. The utility model discloses a particulate matter concentration measurement appearance, simple structure is compact, does not have the part of removal, and it is convenient to install, and use cost is low, and environmental suitability is good, is particularly useful for industrial field dust concentration by mass's high precision measurement.
Description
Technical field
The utility model relates to measuring concentration of granules in certain instrument, belongs to powder concentration measurement field.
Background technology
What powder concentration measurement optical devices mainly adopted is orthoscopic layout, and the optical devices of whole measurement mechanism launch successively along the direction of measuring beam.Light supply apparatus and Signal reception sensing device lay respectively at the both sides of measured zone.When measuring, the Signal reception sensing device of far-end receives the light signal that is directly proportional to dust concentration and converts electric signal to and exports, then by wired or wireless mode by electric signal transmission to the display device of user side, output measurement result.
Optical method powder concentration measurement is generally divided into two kinds based on different principle, that is: light scattering method and light extinction method.Light extinction method utilizes dust to the attenuation by absorption effect of light source, obtains dust concentration information through the signal light intensity of measured zone and the ratio of incident intensity.Its photoelectric signal detection device and incident light are point-blank.This method measuring error is comparatively large, and sensitivity is lower.Be more suitable for high dust concentration occasion, for the occasion that dust concentration is not high, very large deviation can be caused because incident intensity decays not obvious.
Light scattering rule utilizes forward scattering principle, scattering can occur when incident light runs into the dust granules of measured zone, scattered light intensity and incident intensity and position angle existence function relation.This method applicability is good, highly sensitive, applies more extensive.But the powder concentration measurement method of traditional employing light scattering principle also has problems: one is optical devices many employings orthoscopic layout, and light source and sensing device are positioned at measured zone both sides, cause measurement mechanism complex structure, poor to the adaptability of industry spot; Two be due to the method adopt be optical principle, explorer portion is subject to dust pollution, causes the problems such as sensitivity decrease, needs often to carry out safeguarding and demarcating.
Utility model content
For the deficiency that above technology exists, the utility model provides measuring concentration of granules in certain instrument, simple and compact for structure, and without moving-member, it is convenient to install, and use cost is low, good environmental adaptability, is particularly useful for the high-acruracy survey of industry spot bug dust concentration.
The purpose of this utility model is achieved through the following technical solutions:
Measuring concentration of granules in certain instrument, comprise light source, diversing lens, receiver lens, optical signal transmission device, photoelectric detection system and optical element dust protecting device composition, described light source, diversing lens, receiver lens, optical signal transmission device and photoelectric detection system are arranged successively, described optical element dust protecting device is connected with diversing lens and receiver lens, described light source is provided with stabilized voltage supply and TTL modulation circuit, optical signal transmission device two ends are coupled with receiver lens and photoelectric detection system respectively, described photoelectric detection system comprises photoelectric commutator, prime amplifier and lock-in amplifier, described optical element dust protecting device arranges air conduit, described air conduit is provided with filter core.
Described light source is monochromatic laser light source, adopts TTL modulating circuit modulates, exports pulsed light.
Described diversing lens is provided with governor motion.
Described optical signal transmission device adopts multimode optical fiber transmission, and integrated by multimode optical fiber and receiver lens, and form the flashlight transmission system of flexibility, described photoelectric detection system and light source homonymy distribute.
Described photoelectric commutator is avalanche photodide.
Described photoelectric detection system adopts phase sensitive detection technology.
Measuring principle of the present utility model is: when measuring, light source sends one-wavelength laser, the angle of divergence is formed little after diversing lens collimation, energy height is concentrated, the laser beam that spot diameter is little, incides dust measurement region, collide with the dust in measured zone, there is forward scattering, use receiver lens to collect the scattered light in this direction departing from certain angle place, incident light direction, and transfer to photoelectric detection system through optical signal transmission device and receive.What transmit through optical signal transmission device is flashlight, and its intensity is directly proportional to incident intensity and bug dust concentration.And the light signal strength that photoelectric detection system receives has functional relation with the current signal strength of its generation.Thus, the funtcional relationship of bug dust concentration and device electric signal can just be set up.
The beneficial effects of the utility model are:
1. light source adopts high stability, monochromatic laser light source, ensure signal light intensity and stability, light source adopts TTL modulation system, export pulsed light, avoid measure field parasitic light to the interference of measurement result, photoelectric detection system is provided with lock-in amplifier, adopts phase sensitive detection technology, receive only the electric signal corresponding to incident light frequency, lifting gear interference free performance and signal to noise ratio (S/N ratio).
2. optical signal transmission device adopts the mode of multimode optical fiber coupling to make whole measurement mechanism fold layout, makes photoelectric detection system and light source be positioned at homonymy, significantly promotes industry spot adaptability.
3. optical element dust protecting device, by the mode of clean dry air reverse blow, protection optical element is not contaminated in measuring process, significantly improves environmental suitability and the serviceable life of these optical devices.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model closed-in construction schematic diagram.
In figure: 1, light source, 2, diversing lens, 3, receiver lens, 4, optical signal transmission device, 5, photoelectric detection system, 6, optical element dust protecting device, 7, stabilized voltage supply, 8, TTL modulation circuit, 9, photoelectric commutator, 10, prime amplifier, 11, lock-in amplifier, 12, air conduit, 13, filter core, 14, governor motion.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment; technical scheme in the utility model embodiment is clearly and completely described; obviously; described embodiment is only an embodiment of the present utility model; for those of ordinary skill in the art; the every other embodiment obtained under the prerequisite not paying creative work, all belongs to protection domain of the present utility model.
As shown in figure 1 and 2: measuring concentration of granules in certain instrument, comprise light source 1, diversing lens 2, receiver lens 3, optical signal transmission device 4, photoelectric detection system 5 and optical element dust protecting device 6 form, described light source 1, diversing lens 2, receiver lens 3, optical signal transmission device 4 and photoelectric detection system 5 are arranged successively, described optical element dust protecting device 6 is connected with diversing lens 2 and receiver lens 3, described light source 1 is provided with stabilized voltage supply 7 and TTL modulation circuit 8, optical signal transmission device 4 two ends are coupled with receiver lens 3 and photoelectric detection system 5 respectively, described photoelectric detection system 5 comprises photoelectric commutator 9, prime amplifier 10 and lock-in amplifier 11, described optical element dust protecting device 6 arranges air conduit 12, described air conduit 12 is provided with filter core 13.
Described light source 1 is monochromatic laser light source, adopts TTL modulation circuit 8 to modulate, exports pulsed light.
Described diversing lens 2 is provided with governor motion 15.
Described optical signal transmission device 4 adopts multimode optical fiber to transmit, and by multimode optical fiber and receiver lens 3 integrated, form flexible flashlight transmission system, described photoelectric detection system 5 distributes with light source 1 homonymy.
Described photoelectric commutator 10 is avalanche photodide.
Described photoelectric detection system 5 adopts phase sensitive detection technology.
Light source (1) contains the stabilized voltage supply that also should possess except illustrated parts as measurement LASER Light Source, TTL modulation circuit, this device comprises diversing lens (2), the visible light optical material of high permeability can be adopted to make, and be equipped with the governor motion that can regulate outgoing laser facula size, laser beam to be met generation forward scattering in measured zone and dust granules, receive through receiver lens (3), receiver lens (3) can be coated with arrowband anti-reflection film according to laser wavelength of incidence, while guarantee Received signal strength light as much as possible, filtering interference of stray light.Optical signal transmission device (4) adopts the form of multimode optical fiber transmission, and its two ends are coupled with receiver lens (3) and photoelectric detection system (5) respectively.Due to the flexible characteristic of multimode optical fiber, by together with other cell layouts of photoelectric detection system (5) and light source (1) and dust measurement system, collapsible layout can be realized.Photoelectric detection system (5) comprises the avalanche photodide for opto-electronic conversion, the unit such as enlarge leadingly, lock-in amplify, ensure high anti-interfering performance and the high s/n ratio of measuring system, optical element dust protecting device (6) can arrange air conduit, directly dry, clean pressurized air is sent into measured zone when optical system works, around optical element, form local malleation, avoid optical element by dust pollution.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to right.
Claims (6)
1. measuring concentration of granules in certain instrument, it is characterized in that: comprise light source (1), diversing lens (2), receiver lens (3), optical signal transmission device (4), photoelectric detection system (5) and optical element dust protecting device (6) composition, described light source (1), diversing lens (2), receiver lens (3), optical signal transmission device (4) and photoelectric detection system (5) are arranged successively, described optical element dust protecting device (6) is connected with diversing lens (2) and receiver lens (3), described light source (1) is provided with stabilized voltage supply (7) and TTL modulation circuit (8), optical signal transmission device (4) two ends are coupled with receiver lens (3) and photoelectric detection system (5) respectively, described photoelectric detection system (5) comprises photoelectric commutator (9), prime amplifier (10) and lock-in amplifier (11), described optical element dust protecting device (6) arranges air conduit (12), described air conduit (12) is provided with filter core (13).
2. according to the instrument of measuring concentration of granules in certain described in claim 1, it is characterized in that: described light source (1) is monochromatic laser light source, adopt TTL modulation circuit (8) modulation, export pulsed light.
3. according to the instrument of measuring concentration of granules in certain described in claim 1, it is characterized in that: described diversing lens (2) is provided with governor motion (14).
4. according to the instrument of measuring concentration of granules in certain described in claim 1, it is characterized in that: described optical signal transmission device (4) adopts multimode optical fiber transmission, and by multimode optical fiber and receiver lens (3) integrated, form flexible flashlight transmission system, described photoelectric detection system (5) and light source (1) homonymy distribute.
5. according to the instrument of measuring concentration of granules in certain described in claim 1, it is characterized in that: described photoelectric commutator (10) is avalanche photodide.
6. according to the instrument of measuring concentration of granules in certain described in claim 1, it is characterized in that: described photoelectric detection system (5) adopts phase sensitive detection technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520857216.XU CN205157382U (en) | 2015-10-29 | 2015-10-29 | Particulate matter concentration measurement appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520857216.XU CN205157382U (en) | 2015-10-29 | 2015-10-29 | Particulate matter concentration measurement appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205157382U true CN205157382U (en) | 2016-04-13 |
Family
ID=55693061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520857216.XU Active CN205157382U (en) | 2015-10-29 | 2015-10-29 | Particulate matter concentration measurement appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205157382U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442238A (en) * | 2016-07-22 | 2017-02-22 | 华北电力大学 | Device for detecting concentration of particles in air |
| CN106483052A (en) * | 2016-10-08 | 2017-03-08 | 北京信息科技大学 | A kind of PM2.5 detector based on light scattering method |
| CN106644861A (en) * | 2015-10-29 | 2017-05-10 | 上海基恩自动化设备有限公司 | Particulate matter concentration measuring instrument |
| CN108680474A (en) * | 2018-04-13 | 2018-10-19 | 东南大学 | A kind of measuring concentration of granules in certain device and its measurement method based on modulation scattered light intensity |
-
2015
- 2015-10-29 CN CN201520857216.XU patent/CN205157382U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644861A (en) * | 2015-10-29 | 2017-05-10 | 上海基恩自动化设备有限公司 | Particulate matter concentration measuring instrument |
| CN106442238A (en) * | 2016-07-22 | 2017-02-22 | 华北电力大学 | Device for detecting concentration of particles in air |
| CN106442238B (en) * | 2016-07-22 | 2023-06-23 | 华北电力大学 | Device for detecting concentration of particles in air |
| CN106483052A (en) * | 2016-10-08 | 2017-03-08 | 北京信息科技大学 | A kind of PM2.5 detector based on light scattering method |
| CN108680474A (en) * | 2018-04-13 | 2018-10-19 | 东南大学 | A kind of measuring concentration of granules in certain device and its measurement method based on modulation scattered light intensity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205157382U (en) | Particulate matter concentration measurement appearance | |
| CN102914519B (en) | Optical fiber type laser liquid turbidity measuring device and measuring method | |
| CN106644861A (en) | Particulate matter concentration measuring instrument | |
| CN102879359B (en) | Atmospheric visibility measuring system | |
| CN104296783B (en) | The sensing detection method and device of enhanced coherent light time domain reflection | |
| CN105352914B (en) | A kind of gas concentration detection system and its method based on dual wavelength light fibre annular-type cavity | |
| CN102508016A (en) | Voltage detection circuit of motor controller for electric vehicle | |
| CN204731157U (en) | Infrared methane sensor | |
| CN204495716U (en) | A kind of turbidity meter of high precision high accuracy | |
| CN102435582A (en) | High precision laser absorptivity measuring device | |
| CN202471578U (en) | Indoor air detecting device | |
| CN103344645A (en) | Device for measuring albedo of multi-channel narrow-waveband wave spectrum | |
| CN104677789B (en) | A kind of nano particle counting and detecting device and detection method | |
| CN103364365A (en) | WSN (Wireless Sensor Network) sensor node for natural gas content in air | |
| CN206074403U (en) | A kind of outdoor cabinet smog test device | |
| CN205991941U (en) | Self-cleaning turbidity on-line monitor | |
| CN102494799B (en) | Dual-wavelength optical delay optical fiber temperature sensor | |
| KR20120062600A (en) | System for measuring arc and arc delivering device included in the same | |
| CN103528666A (en) | Long-distance optical fiber vibration detection device and method on basis of Sagnac interference | |
| CN107356565A (en) | Portable visibility transilluminator | |
| CN207181297U (en) | Portable visibility transilluminator | |
| CN103903383A (en) | Optical receiving module of high-sensitivity fire smoke alarm | |
| CN203811538U (en) | Mach-Zehnder interferometer and microcavity cascaded intensity detection type sensor | |
| CN202631420U (en) | Photoelectric detection circuit of heavy metal online monitor | |
| CN209215210U (en) | A kind of Tail gas measuring light path system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170721 Address after: 361000 No. 101, 1726 middle Kong Road, Xiamen District, Xiamen Free Trade Zone, Fujian, China Patentee after: West Stone (Xiamen) Technology Co., Ltd. Address before: 200241, room 7078, Ding Lou, 555 Dongchuan Road, Shanghai, Minhang District Patentee before: SHANGHAI GENE AUTOMATION EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Unit 101, 1726 Gangzhong Road, Xiamen Section, Xiamen Free Trade Pilot Area, Fujian Province, 361000 Patentee after: Xishi (Xiamen) Technology Co., Ltd. Address before: Unit 101, 1726 Gangzhong Road, Xiamen Section, Xiamen Free Trade Pilot Area, Fujian Province, 361000 Patentee before: Xishi (Xiamen) Technology Co., Ltd. |