Underground emergency searching and rescuing wireless communication system for transmitting signals by utilizing rail

Abstract

The invention belongs to a wireless communication system in an electronic and information field, in particular relating to an underground emergency searching and rescuing wireless communication system for transmitting signals by utilizing a rail. The underground emergency searching and rescuing wireless communication system for transmitting the signals by utilizing the rail does not need to rely on a transmission network possibly destroyed and can also ensure convenient moving and carrying under extreme conditions, such as mine accidents and the like, and can be used as a communication measure for searching and rescuing in an emergency. The wireless communication system is characterized in that an underwater rail is used as a carrier for transmitting electric signals. The wireless communication system adopts low-frequency or very low-frequency wireless electric signals with several kilometers of wave length and strong barrier penetrating ability and uses the rail as a wireless transmitting and receiving antenna so as to ensure that people trapped underwater can keep communication with people on the ground in an emergency. The invention provides a professional emergency searching and rescuing wireless communication system for people trapped underwater.

Description

technical field [0001] The invention belongs to a wireless communication system in the field of electronics and information, in particular to an underground emergency search and rescue wireless communication system using rails to transmit signals. Background technique [0002] Since radio waves cannot be well propagated underground, especially the attenuation of high-frequency and ultra-high-frequency wireless signals in underground mines is very serious, the communication in underground mines, whether it is wired communication or wireless communication, needs to use effective communication in the tunnel. Long conductors are carriers of electrical signals, such as overhead cables or other cables. The system generally includes base stations, relay stations, and power supply systems. If the cable, relay station or power supply system is damaged, or fails to transmit data, and the transmission network of these communication systems is damaged, the entire communication system wi...

AI Technical Summary

Problems solved by technology

[0002] Since radio waves cannot be well propagated underground, especially the attenuation of high-frequency and ultra-high-frequency wireless signals in underground mines is very serious, the communication in underground mines, whether it is wired communication or wireless communication, needs to use effective communication in the tunnel. Long conductors are carriers of electrical signals, such as overhead cables or other cables. The system generally includes base stations, relay stations, and power supply systems. If the cable, relay station or power supply system is damaged, or fails to transmit data, and the transmission network of these communication systems is damaged, the entire communication system will also be paralyzed, and the search and rescue personnel will not be able to meet the needs of emergency situations. communication works

[0003] Although, low-frequency very low-frequency radio signals are conducive to penetrating obstacles, so for example, the Roland-C positioning system uses a low-frequency frequency of 100 kHz with low propagation attenuation, while the U.S. military Omega positioning system uses a very low-frequency frequency of about 14 kHz , the signal can penetrate tens of meters underwater. The TTE system used by TeleMag in the United States for mine communication also uses very low frequency communication, and the signal can penetrate underground, but their common disadvantages are that the required antenna is very long and the transmission power is large. If you work underground, you need to specially arrange bulky antennas, such as TeleMag’s TTE system. The loop antenna installed underground has a diameter of 60 feet. Due to the inconvenience of moving and carrying, it loses its practical value in mine disasters

Another reason that affects the use of this type of communication equipment is that they are very expensive and difficult to be accepted by ordinary mines

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