Wireless Communication in Underground Mines RFID-based by L. K. Bandyopadhyay

Wireless Communication in Underground Mines RFID-based by L. K. Bandyopadhyay

By L. K. Bandyopadhyay

Underground mines require fool-proof, mine-wide conversation structures for delicate functioning of mine construction and employee defense. right and trustworthy communique structures not just reduce laptop holiday down time, yet extra importantly supply instant transmission of messages from the underground operating sector to the skin for regular mining operations in addition to beneficial rescue operations in case of catastrophe. for this reason, a competent and potent verbal exchange process is a necessary needful for secure operating, and retaining the considered necessary creation and productiveness of underground mines. latest stressed out conversation structures can't achieve components of advanced mines, and are useless in lots of catastrophe occasions. instant verbal exchange in Underground Mines specializes in the new development in instant conversation applied sciences for underground mines and different dangerous parts. This finished booklet offers a unified starting place of instant verbal exchange platforms for transmission of information, voice and video. The ebook additionally contains intrinsically secure layout and improvement elements of circuits, that are crucial for underground mines and unsafe parts. The ebook includes contemporary instant conversation applied sciences designed and built by means of the authors for underground mines and attracts upon their reports within the fields. instant conversation in Underground Mines covers quite a lot of the hot practices of instant conversation structures in addition to instant sensor networking, radio frequency id units, procedure particular embedded software program, program software program, and designing and constructing recommendations for intrinsic secure circuits.

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1997). Digital signal processors (DSPs) are used to compress voice audio signals into narrow bandwidths that are compatible with these low-frequency carriers. The overall system uses low-cost components that are easily reconfigured for changing mine conditions. The low cost of the radios allows for large number of such stations to relay the data throughout the mine. Underground radio is a TTE communication mechanism that offers high-level security. It uses very low frequency (VLF) electromagnetic radiation and digital audio compression technology to carry voice and text data (Gogoi and Raghuram, 1996, 1997a, b).

The extent of attenuation is usually expressed in units called decibels (dBs). If Ps is the signal power at the transmitting end (source) of a communication circuit and Pd is the signal power at the receiving end (destination), then Ps > Pd . The power attenuation Ap in decibels is given by the formula: Ap = 10 log10 (Ps /Pd ). Attenuation can also be expressed in terms of voltage. If Av is the voltage attenuation in decibels, Vs the source signal voltage, and Vd the destination signal voltage, then Av = 20 log10 (Vs /Vd ).

Typically the VoIP telephones are line powered and connect directly to a RJ-45 wall socket, ethernet hub, or switch. An international VoIP standard exists and is fully compatible with public networks. The open architecture allows a mix of VoIP phones from different sources to be used, instead of relying on phones from one PBX manufacturer. 11b-equipped laptop, palm, and industrial GP-104 computers. , 2004) is a planned outcome of the parent project. Some mine operators have nominated CO RR EC 553 UN 552 14 586 587 1 Mine Communication Technique video applications as one of the top three ethernet services priorities – after equipment/sensor monitoring and personal communications.

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