CN105092440A - Multifunctional laser gas/dust online detection and analysis instrument - Google Patents
Multifunctional laser gas/dust online detection and analysis instrument Download PDFInfo
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- CN105092440A CN105092440A CN201410187440.2A CN201410187440A CN105092440A CN 105092440 A CN105092440 A CN 105092440A CN 201410187440 A CN201410187440 A CN 201410187440A CN 105092440 A CN105092440 A CN 105092440A
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Abstract
The invention discloses a multifunctional laser gas/dust online detection and analysis instrument, which can simultaneously measure the gas concentration, dust content, and particle size distribution. The gas can absorb laser in a single line, so laser can be used to measure the gas concentration. At the same time, the dust particles can scatter lights, so the dust content and particle size distribution can be measured by the laser. The instrument is mainly composed of a laser emitting system, a laser receiving system, and a signal processing system. The laser goes through a lens and is converted into parallel collimated light beams; the light beams go through the gas and dust to be detected and reach a laser receiver, the laser receiver converts the light signals into electric signals through photoelectric conversion; the electric signals are amplified and converted into digital signals through A/D collection and conversion; the digital signals are sent to the signal processing system, and the signal processing system process the digital signals to calculate the gas and dust concentrations. The gas detection mode and the dust detection mode can be freely switched in the instrument. The rapid switching can be achieved through program control, and thus the realtime online gas/dust detection can be realized.
Description
Technical field
The present invention relates to laser gas detecting instrument and laser dust detecting instrument field, especially a kind of multifunction laser gas and the synchronous on-line checkingi analytical instrument of dust.
Background technology
Tunable diode laser absorption spectroscopy technology has many good qualities, and this makes it be widely used in field of gas detection.Its advantage mainly comprises: detection speed is fast, and highly sensitive, accuracy is high, can in site measurement, can not need to install pretreatment unit additional simultaneously and filters gas and purify, also can normally measure under bad working environments.But switching system module and the software systems thereof of laser absorption and laser light scattering are not reported so far.At present in a lot of industrial occasions, gas analysis and dust monitoring are all independently instrument and independent engineering system, and instrument cost, running cost, maintenance cost etc. are higher.Gasmetry and dust measurement two-in-one, reach the object of a tractor serves several purposes, reduce equipment cost and installation and maintenance cost, simultaneously also more convenient user checks and record.
Summary of the invention
The detection method of measurement gas and dust while of the invention provides a kind of, adopts method of the present invention can realize the concentration of equipment on-line measurement gas and dust simultaneously, reaches to raise the efficiency, facilitate installation and maintenance, the object such as to reduce costs.
Hardware configuration of the present invention mainly comprises following a few part: laser emission element, laser pick-off unit, gas absorption signal processing module, dust light scattering signal processing module, the program control handover module that gas and dust detect, optical path adjusting and coupling arrangement, sweep gas system, power-supply system, man-machine interaction and external interface system, analyser cabinet.Wherein signal processing unit can be placed on laser emission element cabinet inside, also can be placed on laser pick-off unit cabinet inner, also can place separately.
Laser emission element and laser pick-off unit adopt in-situ type to be arranged on tested pipeline both sides, laser sends from laser emission element, be perforated through tested gas and dust, arrive laser pick-off unit, light signal is become electric signal by light-to-current inversion by laser pick-off unit, electric signal is admitted to signal processing unit again after amplifying process, and signal processing unit just can calculate the concentration of gas and dust after processing signal.
The Main Function of sweep gas system is that protective separation form and maintenance measure light path more accurately, reduces measuring error.
The Main Function of optical path adjusting and coupling arrangement regulates light path.
Accompanying drawing explanation
Accompanying drawing is the synchronous on-line checkingi analytical instrument of multifunction laser gas and dust.1. laser emission element, 2. lens, 3. eat scavenging, 4. gas to be measured/dust pipeline, 5. laser pick-off unit, 6. detector, 7. isolation window, 8. laser, 9. light path regulator, 10. laser instrument, 11. signal processing units.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the present invention is described in detail.
Multifunction laser gas and the synchronous on-line checkingi analytical instrument of dust specifically comprise laser emission element, laser pick-off unit, laser instrument, light path regulating device, detector, lens, isolation window, and signal processing unit, eats the modules such as scavenging.For gas to be measured, first find out the specific absorption wavelength of gas to be measured.According to the semiconductor laser with tunable of the specific absorption wavelength chooses corresponding wavelength of gas to be measured.Pass through control temperature, can the specific absorption wavelength place of the wavelength regulation of laser instrument to gas to be measured, recycle current scanning afterwards and control laser emission wavelength, laser emission wavelength is made to scan through the specific absorption wave band of gas to be measured, photodetector is utilized to collect these light signals through gas to be measured, carry out demodulation process again, just can detect the concentration of gas to be measured.Because the frequency controlling laser wavelength scan can reach about 100Hz, the time of therefore carrying out after a few wheel scan can control within 0.1s, at this time just can be changed sweep current by program control, and then change the emission wavelength of laser, so just by the wavelength tuning of Laser emission to the wave band not having gas absorption, then can carry out dust measurement.The time interval that dust is measured is controlled equally within 0.1s, recycle afterwards program control by sweep current be tuned to gas absorption wave band carry out gas detect, finally realize gas and dust real-time online detect.
The present invention has following advantage:
1, only just can detect the gas to be measured component different with two kinds, dust with an instrument simultaneously, save components and parts cost.
2, only just can detect the gas to be measured component different with two kinds, dust with an instrument simultaneously, save equipment cost.
3, the cost of equipment installation and maintenance can be reduced.
4, user is facilitated to carry out detecting and record.
Claims (3)
1. a multifunction laser gas and dust on-line checkingi analytical instrument, it is characterized in that: apparatus structure unit comprises laser emission element, laser pick-off unit, gas absorption signal processing module, dust light scattering signal processing module, the program control handover module that gas and dust detect, optical path adjusting and coupling arrangement, sweep gas system, power-supply system, man-machine interaction and external interface system, analyser cabinet.
2. multifunction laser gas according to claim 1 and dust on-line checkingi analytical instrument, it is characterized in that: apparatus structure inside arranges the principle of absorption module of gas detect and the scattering principle module of dust detection simultaneously, realizes synchronous on-line monitoring between module by program control switching mode.
3. multifunction laser gas according to claim 2 and dust on-line checkingi analytical instrument, it is characterized in that: arrange program control handover module between described gas absorption signal processing module and dust light scattering signal processing module, program control handover module needs the ware circuit possessing light absorption and light scattering signal control.Multifunction laser gas according to claim 1-3 and dust on-line checkingi analytical instrument, is characterized in that: can realize laser on-line checkingi gas concentration and dust concentration synchronously detects, real-time Transmission concentration information simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187440.2A CN105092440A (en) | 2014-05-06 | 2014-05-06 | Multifunctional laser gas/dust online detection and analysis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187440.2A CN105092440A (en) | 2014-05-06 | 2014-05-06 | Multifunctional laser gas/dust online detection and analysis instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105092440A true CN105092440A (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410187440.2A Pending CN105092440A (en) | 2014-05-06 | 2014-05-06 | Multifunctional laser gas/dust online detection and analysis instrument |
Country Status (1)
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| CN (1) | CN105092440A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053310A (en) * | 2016-08-11 | 2016-10-26 | 北京大方科技有限责任公司 | Dust detection apparatus with foldable calibration mechanism |
| CN106770960A (en) * | 2016-12-28 | 2017-05-31 | 郑州光力科技股份有限公司 | Gas-detecting cavity body structure |
| CN107014720A (en) * | 2017-05-24 | 2017-08-04 | 浙江大学 | A kind of online in site measurement probe of grain graininess |
| CN109459361A (en) * | 2018-12-26 | 2019-03-12 | 广州市怡文环境科技股份有限公司 | A kind of dust measurement system |
| CN110411979A (en) * | 2019-07-30 | 2019-11-05 | 中国地质大学（武汉） | A kind of gas concentration measuring apparatus and method of the coal petrography generation of laser drilling |
| CN114324098A (en) * | 2022-03-10 | 2022-04-12 | 南京波瑞自动化科技有限公司 | Double-light-path laser forward scattering particulate matter concentration measuring device |
| CN115096779A (en) * | 2022-08-26 | 2022-09-23 | 苏州同人激光科技有限公司 | Vehicle-mounted gas quality detection system |
-
2014
- 2014-05-06 CN CN201410187440.2A patent/CN105092440A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053310A (en) * | 2016-08-11 | 2016-10-26 | 北京大方科技有限责任公司 | Dust detection apparatus with foldable calibration mechanism |
| CN106053310B (en) * | 2016-08-11 | 2019-03-15 | 北京大方科技有限责任公司 | A kind of dust investigating with foldable correcting mechanism |
| CN106770960A (en) * | 2016-12-28 | 2017-05-31 | 郑州光力科技股份有限公司 | Gas-detecting cavity body structure |
| CN107014720A (en) * | 2017-05-24 | 2017-08-04 | 浙江大学 | A kind of online in site measurement probe of grain graininess |
| CN109459361A (en) * | 2018-12-26 | 2019-03-12 | 广州市怡文环境科技股份有限公司 | A kind of dust measurement system |
| CN110411979A (en) * | 2019-07-30 | 2019-11-05 | 中国地质大学（武汉） | A kind of gas concentration measuring apparatus and method of the coal petrography generation of laser drilling |
| CN110411979B (en) * | 2019-07-30 | 2023-08-29 | 中国地质大学（武汉） | Device and method for measuring concentration of gas generated by laser drilling coal rock |
| CN114324098A (en) * | 2022-03-10 | 2022-04-12 | 南京波瑞自动化科技有限公司 | Double-light-path laser forward scattering particulate matter concentration measuring device |
| CN115096779A (en) * | 2022-08-26 | 2022-09-23 | 苏州同人激光科技有限公司 | Vehicle-mounted gas quality detection system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |