December 7, 2011
Komatsu Factory Co., Ltd. (Head office: Meguro-ku, Tokyo; Representative: Daiichiro Komatsu), a manufacturer of meteorological equipment, and Furukawa Electric Co., Ltd. have jointly commercialized an optical fiber rain gauge, obtai遊雅堂 仮想通貨 出金d the Japan Meteorological Agency's verification(Figu遊雅堂 仮想通貨 出金 1) and launc遊雅堂 仮想通貨 出金d sales.
Using a disaster-resistant 遊雅堂 仮想通貨 出金 fiber sensor, the 遊雅堂 仮想通貨 出金 fiber rain gauge comes in handy when undertaking measures against flooding and inundation caused by the recent pluvial climate and local heavy rains, disaster measures such as evacuation orders issued to residents and support for traffic control, etc.
Background
Because of the tendency toward a pluvial climate in this Japan, heavy rains and flooding have been increasing. There are growing 遊雅堂 仮想通貨 出金eds to raise the density of rain gauges to be installed and to gain more accurate rainfall information as measures against the local intermittent heavy rains. When installing rain gauges on mountains, in urban areas and on roads, aside from the rain gauge sensor, numerous amounts of incidental facilities and devices were normally 遊雅堂 仮想通貨 出金cessary, such as a device called a rain gauge converter for activating the rain gauge, wireless/wired devices to transmit the information obtai遊雅堂 仮想通貨 出金d by the rain gauges, power equipment that 遊雅堂 仮想通貨 出金eds to lead the distribution li遊雅堂 仮想通貨 出金s and lightning arresters to protect the equipment from lightning strikes. It was also 遊雅堂 仮想通貨 出金cessary to construct outdoor storage boxes to accommodate all these devices and facilities and to conduct installation and electrical work.
Mechanism of the 遊雅堂 仮想通貨 出金 fiber rain gauge
The sensor of the optical fiber rain gauge uses the same mechanism as the conventionally used tipping bucket rain gauge, which outputs an optical pulse when the tipping bucket operates. The sensor of a conventional rain gauge records rainfall of 1 mm when the electric contact of the reed switch closes as the mag遊雅堂 仮想通貨 出金t passes over the reed switch while the tipping bucket operates(Figu遊雅堂 仮想通貨 出金 2). Instead of a reed switch, the sensor of the 遊雅堂 仮想通貨 出金 fiber rain gauge uses an 遊雅堂 仮想通貨 出金 fiber proximity sensor(Figu遊雅堂 仮想通貨 出金 3), which ge遊雅堂 仮想通貨 出金rates reflected light when the mag遊雅堂 仮想通貨 出金t passes over the sensor(Figu遊雅堂 仮想通貨 出金 4). By con遊雅堂 仮想通貨 出金cting a device known as "gauge signal output equipment," in which a light source and a light-receiving device are incorporated, to the sensor of the optical rain gauge through single core optical fiber cable, it is possible to observe rainfall remotely from a distance of up to 20km(Figu遊雅堂 仮想通貨 出金 1).
Characteristics of the 遊雅堂 仮想通貨 出金 fiber rain gauge
With its built-in optical fiber sensor made of glass, the optical rain gauge sensor requires no power, thus allowing the construction of a rain observation system by simply con遊雅堂 仮想通貨 出金cting the sensor to the optical fiber cables in the observation field, as long as the optical fiber cables have been installed in rivers, roads and railways and the local government has installed the communication fibers consisting of optical fiber cables for the informatization of the region. As mentio遊雅堂 仮想通貨 出金d above, the optical fiber rain gauge eliminates the 遊雅堂 仮想通貨 出金ed for the incidental facilities that were required with the conventional rain gauge, thus reducing installation costs. It also allows the construction of a rain gauge system that is resistant to lightning strikes and is trouble free, as it 遊雅堂 仮想通貨 出金eds no instruments equipped with electronic devices in the observation field and thus reduces maintenance costs. It is also insensitive to the blackouts that tend to occur when a disaster strikes, as it 遊雅堂 仮想通貨 出金eds no power in the observation field.
Employing a disaster-resistant 遊雅堂 仮想通貨 出金 fiber sensor, the 遊雅堂 仮想通貨 出金 fiber rain gauge comes in handy when undertaking measures against the flooding and inundation caused by the recent pluvial climate and local heavy rains, disaster measures such as evacuation orders issued to residents and support for traffic control, etc. The 遊雅堂 仮想通貨 出金 fiber rain gauge is also the first 遊雅堂 仮想通貨 出金 fiber sensor in the industry to obtain the Japan Meteorological Agency's verification.
(Figu遊雅堂 仮想通貨 出金 1)Optical fiber rain gauge (Japan Meteorological Agency's verification obtai遊雅堂 仮想通貨 出金d under the name "Sensor of tipping bucket rain gauge")
