• 1. Introduction Optical fiber sensing takes advantage of the physical properties of light as it passes through the optical fiber to detect changes in temperature, strain and other parameters. Optical fiber has wide working frequency band and large dynamic range, which is suitable for remote measurement and remote control. It is an excellent low loss transmission line. Under certain conditions, optical fiber is particularly easy to accept the measured or field loading, and is an excellent sensing element. The optical fiber is electrically neutral, small in size, light in weight, flexible, anti electromagnetic interference, and good in radiation resistance. It is especially suitable for use in flammable, explosive, space restricted, strong electromagnetic interference and othe...
    2022 - 09 - 29
NEWS CENTER
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On the afternoon of October 17, Shanghai Metro Line 18 held a roll-off ceremony at CRRC Zhuji.  The project train is currently the highest level fully automatic driving train (GoA4) unattended during the whole process.Shanghai Metro Line 18 was initially equipped with 50 vehicles and adopted the national standard 6-section A-type car group, with a maximum speed of 80km/h.BEIHAI Communication provided on-board passenger information system for Shanghai Line 18 trains. For the GoA4 level, the passenger information system can adapt to a variety of scenarios for linkage, and it fully cons...
发布时间: 2019 - 12 - 26
Views:62
This year we BEIHAI passed the National High-tech enterprise cerfitication in April, which firmed out intentions in product technology innovation.Warm congratulations again!
发布时间: 2018 - 07 - 06
Views:45
The Metro Routing Reconstruction Project of Shenzhen Metro Line 3 was carried out from December,2012 to March, 2013.To ensure the project be accomplished successfully, our technical staff took effort to overcome lots of difficulties and solve many technical problems.
发布时间: 2018 - 07 - 06
Views:49
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