Optical Rain Gauge measurements: precipitation rate and accumulation - org

The ORG measures rainfall by detecting the optical irregularities induced within the sample volume by precipitating particles falling through a beam of partially coherent infrared light. These irregularities are known as scintillation. By detecting the intensity of the scintillation, the actual rainfall rate can be measured. \n \nThis particular rain gauge is an optical independent analog unit consisting of a frame that contains 1) the transmit head, 2) a receive head and electronics, and 3) a 15-meter-long power/signal cable. The transmit head contains an infrared-emitting diode and lens with heater. The other head contains a photodiode, lens and aperture, heater, electronics, and cable connectors. All wiring between the heads runs within the frame.该ORG设备通过检测穿过部分相干红外光束的降水粒子在采样体积内引发的光学不规则现象来测量降雨量。这类不规则现象被称为闪烁效应（scintillation）。通过检测该闪烁效应的强度，即可测得实际降雨速率。 这款专用雨量计为独立式光学模拟单元，其机架集成了以下组件：1）发射探头；2）接收探头与电子元件；3）一根15米长的电源/信号电缆。发射探头内置红外发光二极管及带加热装置的透镜；接收探头则搭载光电二极管、透镜、光圈、加热装置、电子元件以及电缆连接器。两个探头之间的所有布线均内嵌于机架内部。