Measuring and testing – Moisture content or absorption characteristic of material – By desiccation or extraction
Patent
1987-12-22
1989-01-24
Yasich, Daniel M.
Measuring and testing
Moisture content or absorption characteristic of material
By desiccation or extraction
73171, G01W 114
Patent
active
047993790
ABSTRACT:
An apparatus for measuring the moisture content of falling snow has a sheet of water-absorbing material containing a material which generates a color upon having water added thereto and which is movable from a snow receiving position to a first observation position and then to a heating position and then to a second observation position. A first light receiving sensor in said first observation position is directed toward the surface of the sheet for measuring the area of color formed by absorption of moisture from snow particles received on the sheet when the sheet is in the snow receiving position, a heater is positioned at the heating position for heating the sheet to melt the snow particles thereon, a second light receiving sensor in the second observation position is directed toward the surface of the sheet for measuring the area of color formed by the melted snow particles, and a processor is connected to the light receiving sensors for calculating the ratio of the measured areas as a measurement of the moisture content of the snow particles.
REFERENCES:
patent: 417357 (1889-12-01), Fergusson
patent: 3016737 (1962-01-01), Todnem
patent: 3229519 (1966-01-01), Nilsson
patent: 3472088 (1969-10-01), Ojard
patent: 4150570 (1979-04-01), Fuller
patent: 4338033 (1982-07-01), Kato et al.
Suga Test Instrumenets Co., Ltd.
Yasich Daniel M.
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