RAINFALL MEASUREMENT APPARATUS

To solve the problem of a conventional rainfall measurement device which uses a tipping bucket that the measurement precision decreases due to inertia of the bucket when the amount of rainfall increases and that it is expensive.SOLUTION: Attenuation of an electric wave of satellite broadcasting depending on the amount of rainfall is utilized and noise in a signal received by a parabolic antenna 1 and frequency-converted by a wave detector 3 is removed by a filter 2 to thereby convert the signal into direct current, which is then amplified by an amplifier 4 and transmitted to outside through a communication circuit 5. Hourly rainfall is determined according to a relation between predetermined hourly rainfall and the amount of electric wave attenuation.SELECTED DRAWING: Figure 1 【課題】 従来の雨量測定器は転倒ますを使用しており、雨量が多くなると、ますの慣性のため、測定精度が落ちること、高価であること等の問題があった。【解決手段】 衛星放送の電波が降雨量により、減衰することを利用するもので、パラボラアンテナ１で受信し、周波数変換された信号をフィルター２で雑音を取り除き、検波器３で直流に変換する。増幅器４で増幅し、通信回路５により、外部へ送信する。あらかじめ求めた時間降雨量と電波減衰量の関係から、時間降雨量を求める。【選択図】図１