This year, following the disappearance of Malaysia Airlines MH370 on March 8 for nearly four and a half months, Malaysia Airlines has another accident in Ukraine on July 18! On July 23, Taiwan’s Fuxing Airlines passenger plane crashed and crashed. These aviation incidents occurred continuously and continuously. What caused it? So far, these "air crash events" have not yet reached a conclusion, but as a person in the LED lighting industry, I can not help but also think about the LED industry and aviation aircraft related points, in the LED industry can be reduced in what areas The occurrence of aviation incidents and the further development of the aviation industry. Below, along with the OFweek semiconductor lighting network Xiaobian to understand the selection and installation of aviation obstacle LED lights and other standards.
How to choose aviation obstacle LED lights?
When faced with the obstacle lights in the forest, how do you choose a suitable aviation obstacle light for your floor, chimney, building, or obstacle when facing the aviation obstacle light manufacturer? ? Moreover, the installation design of aviation obstacle lights is clearly regulated. Unlike other common civil lamps, its manufacture and installation are carried out with strict standards.
How to choose obstacle lights, you need to pay attention to several aspects
First, the production of aviation obstacle lights must be checked by strict standards. Therefore, whether the manufacturers of aviation obstacle lights have the strength to develop and produce obstacle lights, this is the innate factor that determines the quality of aviation obstacle lights. For enterprises with R&D and production obstacle lights, the Civil Aviation Administration of China will give a qualification certificate. For example, Shenzhen Reebok Technology Co., Ltd. is an obstacle lamp manufacturer certified by the Civil Aviation Administration of China. An obstacle light, from birth to formal qualification. First of all, in the selection of materials, we must work hard, the materials are not good, even if the strict implementation of standards can not produce qualified obstacle lights. Second, it is in the production process. In addition to implementing strict standards, there must be facilities that can enforce strict standards. Otherwise, the standards are just empty talk. Finally, look at the size of a company and its history. Of course, about a company, we can't be so clear and spend time and energy to understand. Therefore, the most convenient and slightly safe method is to verify the company's business license, log on the company's official website, view the factory photos and other measures to determine is a business rather than a simple small workshop.
Twisted-pair, cable to optical fiber, waveguide and other transmission media are conductive media, and electromagnetic wave in free space in the long distance propagation is non-conductive media transmission; Attenuation is therefore a complex function of distance and is influenced by the atmosphere around the Earth. The main factors affecting propagation attenuation are: propagation frequency band F, propagation distance L and electromagnetic wave rate C(close to the speed of light). Free space propagation loss of microwave segment signals such as satellites is about 36000 km from the ground. The beam diverges with distance. High-power klystrons can transmit signals up to kilowatts, while satellite transponders can only be powered by solar energy. The satellite's limited surface area makes it difficult to transmit hundreds of watts of downlink power. As a result, the ground station's received signal power is only microwatt level and includes a compensation effect of tens of decibels of the gain of the receiving and transmitting antennas.
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