Patent ID: 8587414

Claim:
A wireless information and safety system for mines, characterized in that the system comprises in combination a plurality of programmable active RFID transceiver devices, programmable to operate as coordinators, routers and end devices, having resident hardware application-specific embedded software, and capable of forming a wireless network among themselves; wherein the plurality of programmed RFID transceiver devices are strategically placed to form a unified wireless mesh-networking infrastructure provided with resident wireless sensor network (WSN) application software for tracking, monitoring and storing of information received from the RFID devices connected to sensors; wherein the RFID transceiver devices form an IEEE 802.15.4-based mesh network for tracking of miners and equipment by wireless sensor networking in mines; wherein the RFID transceiver devices feature a 2.4 GHz industrial, scientific and medical (ISM) band; and further wherein the RFID transceiver devices consist of a combination of an antenna ( 1 ), a low-noise filter ( 2 ), a down-conversion mixer ( 3 ), a local oscillator ( 4 ), a band-pass filter ( 5 ), an amplifier ( 6 ), an analog-to-digital converter ( 7 ), a digital demodulator ( 8 ), a radio data interface ( 9 ), control logic ( 10 ), a microcontroller unit ( 11 ), a digital modulator ( 12 ), an analog converter ( 13 ), a low-pass filter ( 14 ), an up-conversion mixer ( 15 ) and a power amplifier ( 16 ); wherein the antenna ( 1 ) is connected in series to the low-noise filter ( 2 ), the down-conversion mixer ( 3 ), the band-pass filter ( 5 ), the amplifier ( 6 ), the analog-to-digital converter ( 7 ) and the digital demodulator ( 8 ); wherein the local oscillator ( 4 ) is connected to the down-conversion mixer ( 3 ) and the amplifier ( 6 ); wherein the digital demodulator ( 8 ) is connected to the digital modulator ( 12 ) through the radio data interface ( 9 ); wherein control logic ( 10 ) is connected to the digital demodulator ( 8 ), the digital modulator ( 12 ) and the radio data interface ( 9 ); wherein the microcontroller unit ( 11 ) is connected to the data interface ( 9 ); wherein the digital modulator ( 12 ) is serially connected to the analog converter ( 13 ), the low-pass filter ( 14 ), the up-conversion mixer ( 15 ) and the power amplifier ( 16 ); and wherein the local oscillator ( 4 ) is connected with the up-conversion mixer ( 15 ).