ZA718609B - Opacity meter with noise suppression - Google Patents
Opacity meter with noise suppressionInfo
- Publication number
- ZA718609B ZA718609B ZA718609A ZA718609A ZA718609B ZA 718609 B ZA718609 B ZA 718609B ZA 718609 A ZA718609 A ZA 718609A ZA 718609 A ZA718609 A ZA 718609A ZA 718609 B ZA718609 B ZA 718609B
- Authority
- ZA
- South Africa
- Prior art keywords
- noise suppression
- opacity meter
- opacity
- meter
- suppression
- Prior art date
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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Spectroscopy & Molecular Physics (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)
- Optical Transform (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10882171A | 1971-01-22 | 1971-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA718609B true ZA718609B (en) | 1973-02-28 |
Family
ID=22324242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA718609A ZA718609B (en) | 1971-01-22 | 1971-12-23 | Opacity meter with noise suppression |
Country Status (7)
Country | Link |
---|---|
US (1) | US3655289A (fr) |
JP (1) | JPS5313983B1 (fr) |
CA (1) | CA932552A (fr) |
DE (1) | DE2202556C3 (fr) |
FR (1) | FR2123019A5 (fr) |
GB (1) | GB1342461A (fr) |
ZA (1) | ZA718609B (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH566059A5 (fr) * | 1972-03-07 | 1975-08-29 | Protecbat La Detection Electro | |
JPS5545506Y2 (fr) * | 1972-12-14 | 1980-10-24 | ||
US3919702A (en) * | 1974-03-18 | 1975-11-11 | Reliance Instr Manufacturing C | Smoke detector |
US3973852A (en) * | 1974-08-30 | 1976-08-10 | The Dow Chemical Company | Method and apparatus for measuring particulate concentration in the atmosphere |
US4025915A (en) * | 1975-10-06 | 1977-05-24 | Electro Signal Lab, Inc. | LED smoke detector circuit |
US4093943A (en) * | 1976-12-27 | 1978-06-06 | Knight Webster B | Sequential power distribution circuit |
DE2713280C3 (de) * | 1977-03-25 | 1986-10-23 | Esser Sicherheitstechnik GmbH & Co KG, 4040 Neuss | Funktionsüberprüfbare Feuermelderanlage |
US4321466A (en) * | 1979-11-26 | 1982-03-23 | Isotec Industries Limited | Sensitivity test system for photoelectric smoke detector by changing light source intensity |
CN104849241B (zh) * | 2015-05-14 | 2017-12-22 | 西安近代化学研究所 | 推进剂烟雾光遮蔽能力测试系统的校准方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1013740A (en) * | 1963-07-04 | 1965-12-22 | Pye Ltd | Improvements in or relating to optical measuring or indicating instruments |
US3428814A (en) * | 1965-05-26 | 1969-02-18 | Bausch & Lomb | Photoelectric system for measuring optical density |
US3419333A (en) * | 1965-09-01 | 1968-12-31 | Ind Res Associates Inc | Runway visual range computer system |
US3541336A (en) * | 1967-11-08 | 1970-11-17 | Harry Einstein | Photoelectric gas monitor having either reflective or absorbing plate at one end of sample tube |
DE1772389A1 (de) * | 1968-05-08 | 1971-04-22 | Bodenseewerk Perkin Elmer Co | Zweistrahlphotometer |
US3537306A (en) * | 1968-12-12 | 1970-11-03 | Gca Corp | Daytime winds detector |
US3548206A (en) * | 1969-01-14 | 1970-12-15 | Royco Instr Inc | Noise rejection circuits for particle counters |
US3561845A (en) * | 1969-06-02 | 1971-02-09 | Beckman Instruments Inc | Radiant energy analyzer including means for offsetting and scaling the ratio of two signals |
-
1971
- 1971-01-22 US US108821A patent/US3655289A/en not_active Expired - Lifetime
- 1971-12-23 ZA ZA718609A patent/ZA718609B/xx unknown
- 1971-12-23 CA CA131021A patent/CA932552A/en not_active Expired
-
1972
- 1972-01-07 GB GB74472A patent/GB1342461A/en not_active Expired
- 1972-01-20 DE DE2202556A patent/DE2202556C3/de not_active Expired
- 1972-01-21 FR FR7202128A patent/FR2123019A5/fr not_active Expired
- 1972-01-22 JP JP808772A patent/JPS5313983B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2202556A1 (de) | 1972-08-03 |
DE2202556B2 (fr) | 1974-02-07 |
FR2123019A5 (fr) | 1972-09-01 |
JPS5313983B1 (fr) | 1978-05-13 |
CA932552A (en) | 1973-08-28 |
DE2202556C3 (de) | 1974-09-05 |
GB1342461A (en) | 1974-01-03 |
US3655289A (en) | 1972-04-11 |
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