AEROSOL REAL TIME MONITOR
First Claim
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1. An aerosol real time monitor comprising:
- a laser light source assembly, configured to emit a laser beam and generate a line-shaped laser spot at a particle excitation position;
a sealed photoelectric measurement chamber, configured to receive an air flow to be measured and form a closed room to prevent light and particles in an external environment from affecting a detection result;
wherein the laser light source assembly is assembled at a laser entrance port located at a rear end of the sealed photoelectric measurement chamber and makes an airtight seal of the laser entrance port;
and inside the sealed photoelectric measurement chamber, the air flow to be measured intersects a light axis of a traveling direction of the laser beam emitted by the laser light source assembly at the particle excitation position where the line-shaped laser spot located;
a scattered light signal reflecting mirror and a fluorescence signal reflecting mirror, bilaterally provided at a left side and a right side with a measurement point as a center, wherein the measurement point is formed by an intersection of the laser beam emitted by the laser light source assembly 100 and the air flow to be measured;
a reflection surface of each of the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror is located inside the sealed photoelectric measurement chamber;
wherein the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror are respectively configured to collect scattered light and fluorescence generated by exposing the particles to be measured in the air flow to be measured to the laser beam, and the scattered light and the fluorescence are respectively reflected to an opposite direction;
both the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror are provided with an opening at a center, and the opening is configured to allow the fluorescence and a the scattered light reflected from the opposite direction to pass through;
a scattered light signal detector and a fluorescence signal detector, respectively mounted behind the opening in the center of the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror to detect the scattered light signal and the fluorescence signal passing through the opening of the reflecting mirrors, respectively;
an extinction reflecting mirror, mounted on a laser exit port at a front end of the sealed photoelectric measurement chamber, wherein the extinction reflecting mirror is configured to keep the laser exit port airtight;
the extinction reflecting mirror is configured to absorb a part of the laser light and reflect a remaining laser light to a light trap arranged at one side of the extinction reflecting mirror; and
the light trap, arranged at one side of the extinction reflecting mirror to absorb the remaining laser light.
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Abstract
A biological and non-biological aerosol real time monitor includes a laser light source assembly configured to emit a laser beam and generate a line-shaped laser spot at a particle excitation position of an air flow to be measured; a sealed photoelectric measurement chamber, wherein the laser light source assembly is assembled at a laser entrance port of the sealed photoelectric measurement chamber, the air flow intersects with the optical axis in the traveling direction of the laser beam-at the particle excitation position; a scattered light signal reflecting mirror and a fluorescence signal reflecting mirror bilaterally provided with a measurement point as the center which is formed by the intersection of the laser beam and the air flow; a scattered light signal detector and a fluorescence signal detector respectively mounted behind a center opening of the reflecting mirrors to detect a scattered light signal and a fluorescence signal.
4 Citations
13 Claims
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1. An aerosol real time monitor comprising:
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a laser light source assembly, configured to emit a laser beam and generate a line-shaped laser spot at a particle excitation position; a sealed photoelectric measurement chamber, configured to receive an air flow to be measured and form a closed room to prevent light and particles in an external environment from affecting a detection result;
wherein the laser light source assembly is assembled at a laser entrance port located at a rear end of the sealed photoelectric measurement chamber and makes an airtight seal of the laser entrance port;and inside the sealed photoelectric measurement chamber, the air flow to be measured intersects a light axis of a traveling direction of the laser beam emitted by the laser light source assembly at the particle excitation position where the line-shaped laser spot located; a scattered light signal reflecting mirror and a fluorescence signal reflecting mirror, bilaterally provided at a left side and a right side with a measurement point as a center, wherein the measurement point is formed by an intersection of the laser beam emitted by the laser light source assembly 100 and the air flow to be measured;
a reflection surface of each of the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror is located inside the sealed photoelectric measurement chamber;
wherein the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror are respectively configured to collect scattered light and fluorescence generated by exposing the particles to be measured in the air flow to be measured to the laser beam, and the scattered light and the fluorescence are respectively reflected to an opposite direction;
both the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror are provided with an opening at a center, and the opening is configured to allow the fluorescence and a the scattered light reflected from the opposite direction to pass through;a scattered light signal detector and a fluorescence signal detector, respectively mounted behind the opening in the center of the scattered light signal reflecting mirror and the fluorescence signal reflecting mirror to detect the scattered light signal and the fluorescence signal passing through the opening of the reflecting mirrors, respectively; an extinction reflecting mirror, mounted on a laser exit port at a front end of the sealed photoelectric measurement chamber, wherein the extinction reflecting mirror is configured to keep the laser exit port airtight;
the extinction reflecting mirror is configured to absorb a part of the laser light and reflect a remaining laser light to a light trap arranged at one side of the extinction reflecting mirror; andthe light trap, arranged at one side of the extinction reflecting mirror to absorb the remaining laser light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification
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Current AssigneeWuxi Maitong Scientific Instrument Co., Ltd.
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Original AssigneeWuxi Maitong Scientific Instrument Co., Ltd.
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InventorsWU, Ruzheng
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesG01N 15/0211 Investigating a scatter or ...G01N 15/0631 Separation of liquids, e.g....G01N 15/075 by optical meansG01N 15/1459 the analysis being performe...G01N 2015/0046 in gas, e.g. smokeG01N 2015/035 the optical arrangement for...G01N 2015/1452 Adjustment of focus; AlignmentG01N 2015/1477 MultiparametersG01N 21/64 Fluorescence; PhosphorescenceG01N 21/6402 Atomic fluorescence; Laser ...G01N 21/6486 Measuring fluorescence of b...
