Measuring and testing – Meteorology – Electric disturbance
Patent
1990-05-01
1991-09-17
Ruehl, Charles A.
Measuring and testing
Meteorology
Electric disturbance
73171, G01W 114
Patent
active
050483315
ABSTRACT:
A continuous rainwater monitoring device for effecting automatic chemical analysis of the rainwater. The device comprises, in addition to a funnel-shaped receiver-container, a rain gauge, a measurement and analysis means, and an automatic recorder, the following: a showering ring disposed above the receiver-container and supplied with a cleaning water from a cleaning water source; a cleaning evaluation means including an electrical resistivity meter; and a rainfall sensor for detecting the commencements and ends of rainfalls. During the time when there is no rainfall, the receiver-container and the rain gauge are filled with cleaning water supplied from the cleaning water source via the showering ring. When a commencement of a rainfall is detected by the rainfall sensor, the stored cleaning water is discharged via the cleaning evaluation means and the measurement of the amount of the rainfall and the chemical analysis of the rainwater are effected automatically and periodically by the rain gauge and the measurement and analysis means, respectively. When an end of the rainfall is detected, the receiver-container and the rain gauge are cleaned of contaminants by means of the cleaning water supplied from the showering ring; the cleaning continues until the resistivity of the used cleaning water as determined by the cleaning evaluation means falls for example below 5 .OMEGA..multidot.cm. After the cleaning is finished, the receiver-container and the rain gauge are filled with the cleaning water, to wait for the commencement of the next rainfall.
REFERENCES:
patent: 4569224 (1986-02-01), Fukumoto et al.
patent: 4600888 (1986-07-01), Fukumoto et al.
patent: 4624834 (1986-11-01), Fukumoto
patent: 4665743 (1987-05-01), Masniere et al.
Fukumoto Takaaki
Hattori Nobuyoshi
Mitsubishi Denki & Kabushiki Kaisha
Ruehl Charles A.
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