CN206974861U - A kind of dust measurement sensor - Google Patents
A kind of dust measurement sensor Download PDFInfo
- Publication number
- CN206974861U CN206974861U CN201720923853.1U CN201720923853U CN206974861U CN 206974861 U CN206974861 U CN 206974861U CN 201720923853 U CN201720923853 U CN 201720923853U CN 206974861 U CN206974861 U CN 206974861U
- Authority
- CN
- China
- Prior art keywords
- electrical appliance
- appliance kit
- measurement sensor
- dust measurement
- fiber coupler
- 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 overcomes the shortcomings of the prior art, there is provided a kind of dust measurement sensor, measurement accuracy is high, stability is good and high sensitivity；In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of dust measurement sensor, including electrical appliance kit and fiber coupler, circuit board is provided with the electrical appliance kit, photodiode is provided with the circuit board, full scale calibration block is provided with the outside of the electrical appliance kit, the end set of the full scale calibration block has laser channeling, and the laser channeling is connected by tracheae and optical-fibre channel with fiber coupler；The utility model can be widely applied to dust measurement field.
Description
Technical field
A kind of dust measurement sensor of the utility model, belongs to dust measurement technical field.
Background technology
Scattering method smokemeter is conventional smoke detector device after conventional laser, and scattering method smokemeter measures after conventional laser
Principle is using infrared laser as transmitting light source, when laser is radiated on dust, produces light scattering.In optical system and powder
Under conditions of dirt property is certain, scattered light intensity is proportional to dust concentration, and then measurement is completed after calculating.
From engineering practice, arching pushing smokemeter is when smoke dust discharge concentration is higher after laser（More than 50mg/m3）, it is
Relatively good selection.But it is directed to domestic 30mg/m3Hereinafter, or even 5mg/m3Dust emission technical requirements, surveyed as online dust
Device is measured, far can not reach technical requirements.Reason is as follows：
（1）The particle diameter and concentration of dust synchronously have dropped a lot, therefore laser reflection and the chance of refraction have dropped a lot,
Appearance does not measure not come out, and does not have phenomena such as reflected light signal.
（2）Flue gas water content increases, and typically to account for more than 10%, even more high, laser is exposed on Mini-type water drop, can be produced
Raw reflection and refraction, thus it is big by moisture interference factor, cause measurement inaccurate.
Currently used in-situ type back scattering instrument, measurement accuracy is low, and stability is poor, and sensitivity is low, and smoke moisture is to surveying
It is very big to measure result influence, and is measured in the range of lower range difficult.
Utility model content
The utility model overcomes the shortcomings of the prior art, there is provided a kind of dust measurement for low concentration passes
Sensor, measurement accuracy is high, stability is good and high sensitivity.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of dust measurement sensor,
Including electrical appliance kit and fiber coupler, circuit board is provided with the electrical appliance kit, photodiode is provided with the circuit board,
Full scale calibration block is provided with the outside of the electrical appliance kit, the end set of the full scale calibration block has laser channeling, described
Laser channeling is connected by tracheae and optical-fibre channel with fiber coupler.
At least one blowback air joint is provided with the fiber coupler.
Protective cover is provided with the outside of fiber coupler and the blowback air joint.
It is provided with electric interfaces on the outside of the electrical appliance kit, is electrically connected between the electrode and circuit board in the electric interfaces.
The utility model has the advantages that compared with prior art.
1st, the utility model uses modularized design, convenient disassembly, facilitates on-site maintenance.
2nd, the utility model has 0-15mg/m3, 0-50mg/m3, 0-100mg/m3Multrirange is optional.
3rd, sensitivity 0.01mg/m of the present utility model3, it is possible to achieve super low concentration measures.
4th, structure precise positioning of the present utility model, sample gas accurately intersect with laser in measuring chamber.
5th, sensor horizontal position is installed in the utility model, and dust granules can only be fallen in measuring chamber, collects scattering
The coupling mirror eyeglass of light will not be contaminated.
Brief description of the drawings
The utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
In figure：1 be electrical appliance kit, 2 be fiber coupler, 3 be circuit board, 4 be photodiode, 5 be full scale calibration block,
6 it is laser channeling, 7 be tracheae and optical-fibre channel, 8 be blowback air joint, 9 be protective cover, 10 is electric interfaces.
Embodiment
As shown in figure 1, a kind of dust measurement sensor of the utility model, including electrical appliance kit 1 and fiber coupler 2, institute
State and circuit board 3 is provided with electrical appliance kit 1, photodiode 4 is provided with the circuit board 3, the outside of the electrical appliance kit 1 is set
There is full scale calibration block 5, the end set of the full scale calibration block 5 has laser channeling 6, and the laser channeling 6 passes through tracheae
It is connected with optical-fibre channel 7 with fiber coupler 2.
At least one blowback air joint 8 is provided with the fiber coupler 2.
The outside of the fiber coupler 2 and blowback air joint 8 is provided with protective cover 9.
The outside of the electrical appliance kit 1 is provided with electric interfaces 10, electricity between the electrode and circuit board 3 in the electric interfaces 10
Connection.
A kind of dust measurement sensor of the utility model is that the core measurement of extraction-type particulate matter on-line monitoring system is single
Member, the wet flue gas containing water droplet or mist is evacuated to test chamber using jet pump, by flue gas to more than 120 degree, i.e. flue gas temperature
Degree is promoted to more than dew point, the scattering method flue gas analysis unit before measuring chamber is provided with laser, LASER Light Source transmitting diameter projected
About 5mm laser beam, dust granules produce scattering light when passing through laser beam, photodiode receives scattered light signal, is transformed into
Voltage signal, then by series of computation, the concentration value of dust particle is drawn, the flue gas after sampling is directly discharged into flue
In, that is, complete whole measurement process.
Each critical piece function is as follows in a kind of dust measurement sensor：
Laser lens blowback air interface：6mm polytetrafluoroethylene (PTFE) tracheaes are connect, UNICOM's blower fan gas outlet, are provided for laser lens
Gas is protected in blowback.
Protective cover：Protect coupling mirror optical fiber and two 4mm polytetrafluoroethylene (PTFE) tracheaes, while reserved light trapping mounting hole.
Tracheae and optical-fibre channel：304 stainless steel tubes, inside are two 4mm polytetrafluoroethylene (PTFE) tracheaes and the passage of optical fiber.
Laser channeling：Two elongated holes are provided with supporting plate component, make laser by the way that finally go directly light trapping.
Full scale calibration block：Inside there are two into 90 jiaos of speculum, change laser emission path, realize full scale calibration.
Electrical box：Gather equipped with parameter version, power panel, digiboard, analog board, laser module, photodiode module, 4mm
Tetrafluoroethene tracheae adapter.
Circuit board：Power panel, digiboard, analog board composition, photodiode are welded on top center, complete from scattering light
Series of computation process of the signal to particle concentration value.
Fibre-coupled mirrors：Laser light scattering signal is collected, focuses to optical fiber head.
Blowback air joint：It is arranged symmetrically, connects two 4mm polytetrafluoroethylene (PTFE) tracheaes, the biconvex eyeglass in coupling mirror is entered
Row protection.
Photodiode：Complete conversion of the optical signal to voltage signal.
Electric interfaces：24V direct currents are provided for power panel, and transmits and calculates data to PLC control unit.
Embodiment of the present utility model is explained in detail above in conjunction with accompanying drawing, but the utility model is not limited to
Embodiment is stated, in those of ordinary skill in the art's possessed knowledge, the utility model aims can also not departed from
On the premise of various changes can be made.
Claims (4)
- A kind of 1. dust measurement sensor, it is characterised in that：Including electrical appliance kit（1）And fiber coupler（2）, the electrical appliance kit （1）Inside it is provided with circuit board（3）, the circuit board（3）On be provided with photodiode（4）, the electrical appliance kit（1）Outside set It is equipped with full scale calibration block（5）, the full scale calibration block（5）End set have laser channeling（6）, the laser channeling （6）Pass through tracheae and optical-fibre channel（7）With fiber coupler（2）Connection.
- A kind of 2. dust measurement sensor according to claim 1, it is characterised in that：The fiber coupler（2）On It is provided with least one blowback air joint（8）.
- A kind of 3. dust measurement sensor according to claim 2, it is characterised in that：The fiber coupler（2）With Blowback air joint（8）Outside be provided with protective cover（9）.
- A kind of 4. dust measurement sensor according to claim 3, it is characterised in that：The electrical appliance kit（1）Outside is set It is equipped with electric interfaces（10）, the electric interfaces（10）Interior electrode and circuit board（3）Between electrically connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720923853.1U CN206974861U (en) | 2017-07-27 | 2017-07-27 | A kind of dust measurement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720923853.1U CN206974861U (en) | 2017-07-27 | 2017-07-27 | A kind of dust measurement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206974861U true CN206974861U (en) | 2018-02-06 |
Family
ID=61398188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720923853.1U Active CN206974861U (en) | 2017-07-27 | 2017-07-27 | A kind of dust measurement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206974861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478554A (en) * | 2017-07-27 | 2017-12-15 | 中绿环保科技股份有限公司 | Dust measurement sensor |
-
2017
- 2017-07-27 CN CN201720923853.1U patent/CN206974861U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478554A (en) * | 2017-07-27 | 2017-12-15 | 中绿环保科技股份有限公司 | Dust measurement sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108827843B (en) | Device and method for measuring mass concentration and particle size spectrum of particulate matters of fixed pollution source | |
| CN102428377A (en) | Particulate detection and calibration of sensors | |
| CN201210132Y (en) | Laser back scattering dust measurement instrument | |
| CN105334147A (en) | Online particle monitoring system and method based on beta ray method and light scattering method | |
| CN104359815A (en) | Particulate matter mass concentration detector with self-purification system | |
| CN101566551B (en) | Backscattering smoke analyzer | |
| CN103439232A (en) | Obscuration type soot particle concentration measuring method and device thereof | |
| CN103018145A (en) | Novel real-time PM2.5 (particulate matter 2.5) mass concentration monitoring device and monitoring method | |
| CN107219156A (en) | Measuring concentration of granules in certain instrument suitable for low, wet flue gas | |
| CN106323826A (en) | Monitoring device and monitoring method for ultralow emission smoke | |
| CN210665421U (en) | Laser scattering particulate matter concentration analyzer | |
| CN102175591A (en) | Laser forward-scattering cloud droplet spectrum probing system | |
| CN102608010B (en) | Particulate matter (PM) detecting method and equipment | |
| CN209167066U (en) | A kind of novel air corpuscular counter | |
| CN103439300A (en) | On-line measuring device for fly ash carbon content of flue | |
| CN107478554A (en) | Dust measurement sensor | |
| CN206974861U (en) | A kind of dust measurement sensor | |
| CN205175881U (en) | Viscidity particulate matter consistency transmitter | |
| CN204461956U (en) | A kind of flue dust monitor for low emission | |
| CN202869934U (en) | Novel real-time monitoring device for mass concentration of PM2.5 | |
| CN207096046U (en) | A kind of low concentrations of particulates thing measuring instrument suitable for wet flue gas | |
| CN206523649U (en) | A kind of atmospheric flow field optical measuring instrument | |
| CN112557269A (en) | Probing type receiving and transmitting integrated optical fiber dust concentration measuring device and method | |
| CN201795972U (en) | On-line dust detector | |
| CN106644867B (en) | Device and method for detecting particulate matters in gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |