GB1388212A - Measurement of fine dust concentrations - Google Patents
Measurement of fine dust concentrationsInfo
- Publication number
- GB1388212A GB1388212A GB207873A GB207873A GB1388212A GB 1388212 A GB1388212 A GB 1388212A GB 207873 A GB207873 A GB 207873A GB 207873 A GB207873 A GB 207873A GB 1388212 A GB1388212 A GB 1388212A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dec
- fed
- dust concentrations
- measurement
- addition
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1388212 Direct measurement of fire dust concentrations BERGWERKSVERBAND GmbH 15 Jan 1973 [8 Dec 1972 9 Dec 1972] 2078/73 Addition to 1328075 Heading G1A The application is a Patent of Addition to Patent No. 1328,075 with the improvements being the extension of the wavelength range to 2,000 nm and/or measuring the scattered radiation directly (that is, without a comparison beam etc.). In an apparatus, Fig. 1, comprising an open ended tube 4, through which the atmosphere to be tested may pass, light (800 nm-2,000 nm) from a gallium arsenide diode 1 fed by an oscillator (15), Fig.2 (not shown), that has been scattered through an angle of approximately 70 degrees is received by silicon photo-diode 8 as shown. The photodiodes output is amplified, demodulated and fed to an adjustable amplifier for calibrating the apparatus.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722260150 DE2260150C3 (en) | 1972-12-08 | 1972-12-08 | Method and device for the determination of fine dust concentrations |
DE19722260313 DE2260313C2 (en) | 1972-12-09 | 1972-12-09 | Method and device for the determination of fine dust concentrations |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1388212A true GB1388212A (en) | 1975-03-26 |
Family
ID=25764209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB207873A Expired GB1388212A (en) | 1972-12-08 | 1973-01-15 | Measurement of fine dust concentrations |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS4990984A (en) |
FR (1) | FR2210290A6 (en) |
GB (1) | GB1388212A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107576601A (en) * | 2017-09-20 | 2018-01-12 | 张家港朗亿机电设备有限公司 | Suitable for the particulate matter on-line checking and analysis meter in urban track traffic place |
CN109752301A (en) * | 2019-03-05 | 2019-05-14 | 北京英视睿达科技有限公司 | The measuring device and check and correction factor determination method of total suspended particles concentration |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5960342A (en) * | 1982-09-30 | 1984-04-06 | Toyota Motor Corp | System for measuring dust concentration |
JPS6076645A (en) * | 1983-10-03 | 1985-05-01 | Hajime Kano | Dust-concentration measuring apparatus |
JP3015633B2 (en) * | 1993-09-07 | 2000-03-06 | ホーチキ株式会社 | Scattered light smoke detector |
JP3015634B2 (en) * | 1993-09-07 | 2000-03-06 | ホーチキ株式会社 | Scattered light smoke detector |
JP6437732B2 (en) * | 2014-03-28 | 2018-12-12 | 能美防災株式会社 | smoke detector |
-
1973
- 1973-01-15 GB GB207873A patent/GB1388212A/en not_active Expired
- 1973-01-18 FR FR7301706A patent/FR2210290A6/fr not_active Expired
- 1973-02-14 JP JP48017543A patent/JPS4990984A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107576601A (en) * | 2017-09-20 | 2018-01-12 | 张家港朗亿机电设备有限公司 | Suitable for the particulate matter on-line checking and analysis meter in urban track traffic place |
CN107576601B (en) * | 2017-09-20 | 2023-11-17 | 张家港朗亿机电设备有限公司 | Particle on-line detection and analysis instrument suitable for urban rail transit places |
CN109752301A (en) * | 2019-03-05 | 2019-05-14 | 北京英视睿达科技有限公司 | The measuring device and check and correction factor determination method of total suspended particles concentration |
Also Published As
Publication number | Publication date |
---|---|
JPS4990984A (en) | 1974-08-30 |
FR2210290A6 (en) | 1974-07-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed |