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.

本ORG设备通过检测下落的降水粒子穿过部分相干红外光束时在采样体积内引发的光学畸变来测量降雨量。这些光学畸变被称为闪烁（scintillation）。通过检测该闪烁的强度，即可测得实际降雨率。

该款光学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）接收探头及电子元件；3）一条15米长的电源/信号线缆。发射探头内置红外发光二极管与带加热功能的透镜。接收探头则配备光电二极管、透镜、光阑、加热组件、电子元件及线缆接头。探头间的所有布线均集成于机架内部。