FR2293718A1 - Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area - Google Patents

Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area

Info

Publication number
FR2293718A1
FR2293718A1 FR7440094A FR7440094A FR2293718A1 FR 2293718 A1 FR2293718 A1 FR 2293718A1 FR 7440094 A FR7440094 A FR 7440094A FR 7440094 A FR7440094 A FR 7440094A FR 2293718 A1 FR2293718 A1 FR 2293718A1
Authority
FR
France
Prior art keywords
light beam
known area
pass
rain gauge
rain
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.)
Granted
Application number
FR7440094A
Other languages
French (fr)
Other versions
FR2293718B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DONNADIEU GEORGES
Original Assignee
DONNADIEU GEORGES
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DONNADIEU GEORGES filed Critical DONNADIEU GEORGES
Priority to FR7440094A priority Critical patent/FR2293718A1/en
Publication of FR2293718A1 publication Critical patent/FR2293718A1/en
Application granted granted Critical
Publication of FR2293718B1 publication Critical patent/FR2293718B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/14—Rainfall or precipitation gauges

Abstract

Rain gauge appts. comprises one or more collectors(10) of rain drops having means(11) for emitting a light beam of known area, a photodetector(16) sensitive to the variations of light flux caused by a rain drop passing through the light beam(N) and a filtering/amplifying stage(18). Each collector has an associated electronic unit whic produces an analogue signal whose peak level is proportional to the cross section of the drop. This unit comprises an integrator circuit which provides a signal which is integrated w.r.t. the time of the analogue signal and whose level is proportional to the cross section of the drop divided by its velocity.
FR7440094A 1974-12-06 1974-12-06 Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area Granted FR2293718A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7440094A FR2293718A1 (en) 1974-12-06 1974-12-06 Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7440094A FR2293718A1 (en) 1974-12-06 1974-12-06 Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area

Publications (2)

Publication Number Publication Date
FR2293718A1 true FR2293718A1 (en) 1976-07-02
FR2293718B1 FR2293718B1 (en) 1977-03-25

Family

ID=9145691

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7440094A Granted FR2293718A1 (en) 1974-12-06 1974-12-06 Rain gauge apparatus with photoelectric detection - for falling raindrops which pass through light beam of known area

Country Status (1)

Country Link
FR (1) FR2293718A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463394A1 (en) * 1979-08-06 1981-02-20 Nereides Data acquisition system for measurement of rainfall - employs microprocessor to store time and precipitation data in static memory
EP0209521A1 (en) * 1985-01-25 1987-01-28 Hss Inc. Precipitation identification by utilizing particulate size and velocity, extinction coefficients and humidity measurements
WO1998000736A1 (en) * 1996-07-02 1998-01-08 Alka Electronic Aps Optical flow meter
ES2115503A1 (en) * 1995-09-27 1998-06-16 Univ Catalunya Politecnica Optical spectropluviometer.
FR2782384A1 (en) * 1998-08-11 2000-02-18 Centre Nat Rech Scient Rain measuring device to determine spread and raindrop speed over given area and arrival time of rain drops, for real time analysis of meteorological conditions

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463394A1 (en) * 1979-08-06 1981-02-20 Nereides Data acquisition system for measurement of rainfall - employs microprocessor to store time and precipitation data in static memory
EP0209521A1 (en) * 1985-01-25 1987-01-28 Hss Inc. Precipitation identification by utilizing particulate size and velocity, extinction coefficients and humidity measurements
EP0209521A4 (en) * 1985-01-25 1990-01-08 Hss Inc Precipitation identification by utilizing particulate size and velocity, extinction coefficients and humidity measurements.
ES2115503A1 (en) * 1995-09-27 1998-06-16 Univ Catalunya Politecnica Optical spectropluviometer.
WO1998000736A1 (en) * 1996-07-02 1998-01-08 Alka Electronic Aps Optical flow meter
FR2782384A1 (en) * 1998-08-11 2000-02-18 Centre Nat Rech Scient Rain measuring device to determine spread and raindrop speed over given area and arrival time of rain drops, for real time analysis of meteorological conditions
WO2000009987A1 (en) * 1998-08-11 2000-02-24 Centre National De La Recherche Scientifique (Cnrs) Device for measuring the size of moving particles, in particular for pluviometric measurements
US6590650B1 (en) 1998-08-11 2003-07-08 Centre National De La Recherche Scientififque (Cnrs) Device for measuring the size of moving particles, in particular for pluviometric measurements

Also Published As

Publication number Publication date
FR2293718B1 (en) 1977-03-25

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Legal Events

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TP Transmission of property