Method for estimating rainfall and a sensing device therefor

Details Method for estimating rainfall and a sensing device therefor Method for estimating rainfall and a sensing device therefor

1988-07-14

1990-01-16

Ruehl, Charles A.

Measuring and testing

Meteorology

Electric disturbance

364420, G01W 114

Patent

active

048935069

ABSTRACT:
An apparatus and method for estimating rainfall. A rainfall sensing device is used to generate rain signal Vo; when it is raining (Vo=1), a number of consecutive sampled rain signals are picked up within a given period of time. The conditions (shower, heavy rain, light rain or no rain) of rainfall are estimated by comparing the sampled rain signals to predetermined raining index N1 and no-rain index N2. The rainfall sensing device comprises a Wheatstone bridge circuit and a differential amplifier. The two adjacent branches of the Wheatstone bridge circuit are provided with a thermal resistor as a rain-sensor and a thermal resistor as a temperature compensating element respectively.

REFERENCES:
patent: 1236381 (1917-08-01), Rogers
patent: 3575641 (1971-04-01), Long
patent: 4305280 (1981-12-01), Vonnegut et al.

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