Experience China's high-speed rail Why do tens of millions of fans and internet celebrities abroad call it "crazy"?

MSN - 06:31
Recently, the internet celebrity "Hydrothyroid" that netizens at home and abroad has paid attention to, ended a wonderful trip to China. A live broadcast on the high-speed rail directly rushed to the hot search on Weibo. "This is simply crazy!" Why does the high-speed rail pass through the tunnel and still have live broadcast signals? His contributions should not be underestimated! 01 Where does the signal in the tunnel come from? High-speed rail construction and communication infrastructure construction have long established a "four synchronization" mechanism. At the beginning of the design of high-speed rail tunnel, the designers considered the communication problem. They arranged a mysterious hut every 500 meters in the tunnel to install the operator's communication equipment. It is like a mini communication base station responsible for transmitting and receiving signals in the tunnel. 02 How does the signals in the tunnel propagate? With a signal, "antenna" is also needed to transmit the signal. The "antenna" in the tunnel is a communication leakage cable installed on the wall of the tunnel. The communication leakage cable is a very special cable. It does not "close" the signal inside like an ordinary cable. Instead, it is like a sprinkler. It evenly "leak" the signal and can also receive signals from the mobile phone. The communication leakage cable is generally laid at a height of 1.8 meters to 2.8 meters from the rail surface, just flush with the high-speed rail window. The signal is easier to "drill" into the car, greatly reducing the loss when the signal penetrates the metal, and also making passengers more stable and smooth in the tunnel! 03...

recent

The internet celebrity "Hyperthyroidism" that netizens at home and abroad pay attention to

Ended a wonderful trip to China

His live broadcast on the high-speed rail

Go directly to the hot search on Weibo

"This is simply crazy!"

Why do high-speed rail pass through the tunnel?

Still live broadcast signal?

His contributions should not be underestimated!

01

Where does the signal in the tunnel come from?

High-speed rail construction an...
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