Walkie talkie mine level

1. w will not proce so many things. Its hair will fall out. It is considerate

2. There are many procts that can do it. Take bd500 walkie talkie as an example, by customizing the communication mole and antenna, bd500 has stronger signal penetration and can still present clear voice when the same frequency signal interferes; Cooperate with the 5W / 4W transmitting power of the hand table to ensure good signal receiving and transmitting effect
in addition, there are flammable and explosive gas or st environment in the mine, a little spark or energy will cause explosion, in these environments, special explosion-proof equipment is needed to ensure safe operation
with the mission of ensuring the safety of users, based on years of continuous and in-depth research in the field of explosion-proof, a series of intrinsically safe explosion-proof walkie talkies have been launched, and continuous technological innovation has been carried out to achieve the ultimate explosion-proof performance. Explosion proof family procts have passed a number of certification, including IECEx, ATEX, FM, CSA, CQST, ul913, tia-4950, etc., which meet the use requirements in flammable and explosive gas and st environment, and escort the safe proction and operation.

3. In fact, it's a USB cable, but there are many models at the end of the interphone, most of which are two earphone plugs. Plug in the interphone, and the other end is connected to the computer. Then you can write different frequencies to your interphone through software. If the frequency groups written by several interphones are the same, then these interphones can communicate.

4. Generally, the walkie talkie used under the mine is wired, and can't use wireless, because a kind of explosive gas will be proced under the mine. If you use wireless walkie talkie, it may cause explosion ~!

5. Hello, I see that your question has not been answered for a long time, but if the question is overe, no one will answer it, and your reward points will be confiscated! So I'd like to give you a few suggestions:
first, you can choose to ask questions in the correct category, so that more people will know your answers and more people will answer them
Second, you can go to the forum of professional websites related to your problems. There are many professionals gathered there, and they will certainly be able to solve your problems for you
thirdly, you can ask your online friends, they will be more sincere and enthusiastic to find answers for you, and they can even search the relevant websites directly.
fourthly, there are many professional forums and knowledge platforms on the Internet, and there are many materials on them. When I encounter professional problems, I always go to the forum to seek solutions
five, ask your questions in detail and clearly! Make it easier for people to understand what it means
thank you for taking my advice!

6. The hp780 and HP700 digital explosion-proof walkie talkie of hytera are used in Mongolia and Shanxi mines. This walkie talkie is an intrinsically safe professional explosion-proof walkie talkie, which has passed the 3C explosion-proof certification of the new national regulations, and can be used safely in high-risk explosion-proof areas. What I like better is that his communication coverage ability is very strong. We are wild and have no signal, which is very terrible. Frankly speaking, it's quite real.

7. Beifeng interphone

8. Considerations for choosing walkie talkie
frequency range

Professional walkie talkie: equipped with professional frequency writing software, The frequency can be changed / increased / decreased according to the actual needs of customers.
134-174mhz 400-470MHz 350-390mhz police band
134-160 MHz 148-174mhz 400-430mhz 450-490mhz
call distance
Professional walkie talkie: 3-5km
Civil walkie talkie: about 1km
appearance volume
Professional walkie talkie: color is generally black
Civil walkie talkie: about 1km Use walkie talkie: mostly color
use environment
professional machine: factory, coal mine, property, petroleum, chemical instry, airport, station, aviation, kindergarten, hotel, gas station, shopping mall, office building, supermarket, logistics, hospital and other medical institutions, cinema, museum, exhibition hall, science and Technology Museum, art museum
civil machine: small shopping mall, small supermarket Small scale kindergarten, small open space
frequency writing
Professional walkie talkie: professional walkie talkie is equipped with professional frequency writing software and frequency writer [one end of the frequency writer is connected to the computer, the other end is connected to the walkie talkie, and the frequency can be written according to their own needs
Civil walkie talkie: the frequency point of civil walkie talkie is built-in and cannot be changed, It is also not allowed to increase or decrease (generally, 20 frequency points are built in the factory)
general distribution of Wuhan sunchi communication walkie talkie in Central China

9. Explosion proof walkie talkies should be used in coal mines. Imported brands such as Motorola's GP328, 338, etc. have a price of more than 2000 yuan. There are few domestic brands in this aspect, so it's hard to say the explosion-proof performance
the use of underground wireless walkie talkie is quite limited. It will be very difficult for you to directly contact underground and on the well, and it will also be very difficult for you to contact each other underground. You need to use the wired relay system to fully cover the working face and roadway.

10. Yes, if you only use a single walkie talkie, the effect will not be good, because the walkie talkie transmits signals through radio waves. Under normal geographical and air conditions, it can be transmitted several kilometers away. However, in the underground or karst cave, as you say, the passage of the mine is not vertical, and the air quality inside is different from that of the outside, it will have a great impact on the transmission of the machine, It's not even working. It is suggested to use the underground communication special system. Through leakage communication, the special leakage cable is used as the medium of radio wave transmission, and several relay stations are used to amplify the signal, so as to realize the mutual communication between the underground and the well, as well as the mutual communication between the underground operators.