CN1346976A - Dust gauge based on single-end opaque method - Google Patents
Dust gauge based on single-end opaque method Download PDFInfo
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- CN1346976A CN1346976A CN 01136683 CN01136683A CN1346976A CN 1346976 A CN1346976 A CN 1346976A CN 01136683 CN01136683 CN 01136683 CN 01136683 A CN01136683 A CN 01136683A CN 1346976 A CN1346976 A CN 1346976A
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- light path
- dust
- gauge based
- flue
- cover
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Abstract
A dust gauge based on single-end opaque method is composed of a laser source, a splitter, a reference detector, a movable scaled sleeve with built-in lens and arranged in flue, a dual-surface reflector, a measuring detector, and a controller for amplifying and processing the signals from reference and measuring detectors and calculating dust concentration.
Description
Technical field
The present invention relates to a kind of dust measuring device, particularly a kind of opacity method dust measuring device.
Background technology
Traditional opacity method dust measuring device mainly is a laser penetration method dust measuring device, and the structure of its exemplary device as shown in Figure 1.
In this dust measuring device, Laser emission end and receiving end will be installed in chimney or flue 18 both sides respectively.The Laser emission end will be made up of lasing light emitter 11, light splitting piece 12, detector 13, and receiving end mainly is made up of lens 14, measurement detector 15 and control circuit 16.Measuring principle is based on lambert-Bill (Lambert-Beer) principle: promptly when a monochromic beam (as laser) passed the flue gas that is full of particle (flue dust), basic output intensity and incident intensity satisfied
I=I
0e
-kcl(1) in the formula: I---output intensity,
I
0---incident intensity,
K---the constant relevant with the flue dust characteristic,
C---dust concentration, the mg/m of unit
3,
L---light path, the m of unit.
In the real work, Laser emission end and receiving end are equipped with back blowing machine 17 separately, to keep the cleaning of optical mirror plane.The shortcoming of this device is: 1) bigger to the light difficulty in the installation process; 2) can't realize the demarcation of online Zero calibration and span.
Summary of the invention
The purpose of this invention is to provide a kind of opacity method dust measuring device that can solve above-mentioned two problems.
The object of the present invention is achieved like this, and dust gauge based on single-end opaque method comprises: a lasing light emitter, be positioned at the probe front end, and be used to generate measuring beam; A light splitting piece is arranged on the place ahead of lasing light emitter light path; A reference detector is positioned on the vertical beam split light path of light splitting piece; One can be moved and demarcates cover, is positioned on the horizontal beam split light path of light splitting piece, and fixedly on the flue, its interior cover can parallelly outwards move to flue to its overcoat, and an intermediate lens is set in it; A double mirror places the probe rearward end, and aims at intermediate lens; A catoptron that is arranged on the probe front end is positioned on the reflected light path of double mirror; A measurement detector is positioned on the reflected light path of catoptron; And a control circuit, be used for the detected signal of reference detector and measurement detector is finally calculated dust concentration after processing and amplifying.
Advantage of the present invention is, adopts single-ended mounting means, calibrates before light path is dispatched from the factory, on-the-spot install very easy.In addition, can finish the zero point of instrument and the on-line proving of span.
Describe the present invention below in conjunction with accompanying drawing, so that further understand above-mentioned purpose of the present invention, advantage and characteristics.
Description of drawings
Fig. 1 is a conventional laser through transmission technique dust measuring schematic representation of apparatus;
Fig. 2 is the synoptic diagram of dust gauge based on single-end opaque method of the present invention.
Embodiment
Referring to Fig. 2, dust gauge based on single-end opaque method of the present invention comprises: a lasing light emitter 201 is positioned at the probe front end and is used to generate measuring beam; A light splitting piece 202 is arranged on the place ahead of lasing light emitter light path; A reference detector 203 is positioned on the vertical beam split light path of light splitting piece; One can be moved and demarcates cover 209, is positioned on the horizontal beam split light path of light splitting piece, and fixedly on the flue, its interior cover can parallelly outwards move to flue to its overcoat, and an intermediate lens 204 is set in it; A double mirror 205 places the probe rearward end, and aims at intermediate lens 204; A catoptron 206 that is arranged on the probe front end is positioned on the reflected light path of double mirror 205; A measurement detector 207 is positioned on the reflected light path of catoptron; And a control circuit 208, be used for the detected signal of reference detector 203 and measurement detector 207 is finally calculated dust concentration after processing and amplifying.
In addition, also be provided with: a gear train 210, be used to promote removable demarcation cover 209 in cover into chimney or flue, will measure light path and be closed, be full of the light path that is closed with clean air then, the zero point of calibrating instrument; And a standard extinction sheet insertion device 211, standard extinction sheet is inserted in the measurement light path, finish the span of instrument and demarcate.
In addition, support 213 connects the double mirror 205 and the removable demarcation cover 209 of probe rear end, makes its one-tenth as a whole.In order to protect the cleanliness of lens 204 and catoptron 205, form two air curtains 212 by gas circuit at the two ends of support.
Below in conjunction with Fig. 2 workflow of the present invention is described.
The light beam that lasing light emitter 201 takes place is separated sheet 202 and is divided into two parts.A part is a reference light, is directly received by reference detector 203, thereby obtains incident intensity I0 signal.Another part is a measuring light, measuring light is through intermediate lens 204, pass the flue gas that is full of flue dust, be placed in the double mirror 205 reflected back flue gases of probe end, once more by after the flue dust light absorption, get on the catoptron 206, the mirror 206 that is reflected reflexes to measure on the detector 207 and is received, thereby obtains the output intensity I signal.Control circuit 208 with reference detector 203 and the detected signal of measuring detector 207 after amplifying, by finally calculating dust concentration C after following formula (1) processing.During the instrument on-line proving, gear train 210 promotes removable demarcation cover 209 and enters chimney or flue, will measure light path and be closed, and is full of the light path that is closed with clean air then, the zero point of calibrating instrument.After Zero calibration was intact, standard extinction sheet inserted device 211 standard extinction sheet is inserted in the measurement light path, finished the span of instrument and demarcated.Unique air curtain 212 designs have ensured the cleaning of intermediate lens and double-sided reflecting minute surface, realize the continuous on-line monitoring of instrument.
Claims (5)
1, a kind of dust gauge based on single-end opaque method comprises:
A lasing light emitter (201) is positioned at the probe front end and is used to generate measuring beam;
A light splitting piece (202) is arranged on the place ahead of lasing light emitter light path;
A reference detector (203) is positioned on the vertical beam split light path of light splitting piece (202);
One can be moved and demarcates cover (209), is positioned on the horizontal beam split light path of light splitting piece (202), and fixedly on the flue, its interior cover can parallelly outwards move to flue to its overcoat, and an intermediate lens (204) is set in it;
A double mirror (205) places the probe rearward end, and aims at intermediate lens (204);
A catoptron (206) that is arranged on the probe front end is positioned on the reflected light path of double mirror (205);
A measurement detector (207) is positioned on the reflected light path of catoptron (206); And
A control circuit (208) is used for the detected signal of reference detector (203) and measurement detector (207) is finally calculated dust concentration after processing and amplifying.
2, dust gauge based on single-end opaque method according to claim 1 also comprises: a gear train (210), be used to promote removable demarcation cover (209) in cover into chimney or flue.
3, dust gauge based on single-end opaque method according to claim 1 comprises that also a standard extinction sheet inserts device (211).
4, dust gauge based on single-end opaque method according to claim 1, its medium-height trestle (213) connects double mirror (205) and removable demarcation cover (209), makes its one-tenth as a whole.
5, dust gauge based on single-end opaque method according to claim 4, the two ends of its medium-height trestle (213) form two air curtains (212) by gas circuit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01136683 CN1346976A (en) | 2001-10-26 | 2001-10-26 | Dust gauge based on single-end opaque method |
| CNB021173532A CN1182383C (en) | 2001-10-26 | 2002-05-20 | Method and equipment for measuring dust by single-end opaque method |
| CN 02234834 CN2581982Y (en) | 2001-10-26 | 2002-05-20 | Apparatus for testing dust by single end non-transparence method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01136683 CN1346976A (en) | 2001-10-26 | 2001-10-26 | Dust gauge based on single-end opaque method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1346976A true CN1346976A (en) | 2002-05-01 |
Family
ID=4673826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01136683 Pending CN1346976A (en) | 2001-10-26 | 2001-10-26 | Dust gauge based on single-end opaque method |
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| Country | Link |
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| CN (1) | CN1346976A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288555A (en) * | 2011-07-26 | 2011-12-21 | 山西维力科技有限责任公司 | Bijection type high-temperature smoke sensor and real-time detection method |
| CN102967567A (en) * | 2012-11-21 | 2013-03-13 | 铜陵蓝光电子科技有限公司 | Online monitoring instrument for water quality by colorimetry |
| CN103439232A (en) * | 2013-08-30 | 2013-12-11 | 合肥工业大学 | Obscuration type soot particle concentration measuring method and device thereof |
| CN106644867A (en) * | 2016-12-30 | 2017-05-10 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gases |
-
2001
- 2001-10-26 CN CN 01136683 patent/CN1346976A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288555A (en) * | 2011-07-26 | 2011-12-21 | 山西维力科技有限责任公司 | Bijection type high-temperature smoke sensor and real-time detection method |
| CN102967567A (en) * | 2012-11-21 | 2013-03-13 | 铜陵蓝光电子科技有限公司 | Online monitoring instrument for water quality by colorimetry |
| CN103439232A (en) * | 2013-08-30 | 2013-12-11 | 合肥工业大学 | Obscuration type soot particle concentration measuring method and device thereof |
| CN106644867A (en) * | 2016-12-30 | 2017-05-10 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gases |
| CN106644867B (en) * | 2016-12-30 | 2023-08-29 | 聚光科技(杭州)股份有限公司 | Device and method for detecting particulate matters in gas |
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