创作
发表于 2025-3-25 05:29:35
Shaft Communication,age, and at pit bottom. The system consists of a low-frequency electromagnetic wave transceivers unit powered by the external battery and attached with a current coupler clamped with the guide rope, which induces the current throughout the rope (Bandyopadhyay et al., 2002).
厚颜
发表于 2025-3-25 10:12:46
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observatory
发表于 2025-3-25 15:26:48
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nonradioactive
发表于 2025-3-25 18:24:55
Line-of-Sight Communication,hese modes are lossy modes because any part of the wave that impinges on tunnel wall is partly refracted into the surrounding dielectric and partly reflected back into the waveguide (Holloway et al., 2000).
Critical
发表于 2025-3-25 23:17:34
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欢呼
发表于 2025-3-26 03:47:39
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SYN
发表于 2025-3-26 06:30:00
Programming of RFID Devices,-purpose hardware. Application-specific embedded software has been developed for programming RFID devices to function as coordinator, router, end device, and various other purposes (Bandyoadhyay et al., 2007).
战役
发表于 2025-3-26 08:35:10
Tracking and Monitoring Software, duty hour basis. Safety of miner is another aspect, which is covered by this software, which is done by sending warning signals for each risky situation. The software also helps in establishing text message communication, online monitoring of environmental parameters, identifying trapped miners in case of disaster, and various other aspects.
假
发表于 2025-3-26 12:53:03
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公理
发表于 2025-3-26 18:28:30
Trapped Miner Communication,es is met without using flameproof (FLP) enclosure. This power restriction further limits the communication range in underground mines. Therefore, transceivers should be designed with suitable frequency, which attenuates less when passing through coal block (Balanis, 1973; Reagor, 1997). Based on th