Positioning alarm system built with radio transceiver module

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Positioning alarm system built with radio transceiver module [Copy link]

1. System composition: Each miner carries a radio transmitter module to detect the gas and dust concentration at the workplace in a timely manner and send the detection data to the radio receiver module. Radio receiver modules are set up at certain positions in the mine. These modules transmit the information detected by the miners to the mine command center in a timely manner through wired transmission. The mine command center can timely understand the working status of the mine on the computer screen. In the event of an emergency, the mine command center can quickly determine the location of the miner carrying the transmitter module according to the number of the radio transmitter module, and the miner can also send an alarm signal to the mine command center through the radio transmitter module. 2. Radio transmission module: Each miner carries a radio transmission module controlled by a single-chip microcomputer. The output signals of various sensors are amplified by AD8051 operational amplifiers and sent to the MC68HC908LJ12 single-chip microcomputer with a built-in digital/analog converter. In the single-chip microcomputer, the input signal is compared with the reference. If the input signal is lower than the reference value, the single-chip microcomputer output signal drives the green LED to indicate that it is in normal working condition; if the input signal is near the reference value, the single-chip microcomputer output signal drives the yellow LED to indicate that the gas concentration is in a critical state; if the input signal is higher than the reference value, the single-chip microcomputer output signal drives the red LED to indicate that the gas concentration is in a critical state; if the input signal is higher than the reference value, the single-chip microcomputer output signal drives the red LED to indicate that the gas concentration is in a dangerous state. At this time, the red LED keeps flashing. At the same time, the module keeps vibrating, which is convenient for miners to find out in time. All detection data can also be output from the I/O port of the single-chip computer to the MC13192 radio transmission module, which in turn sends the detection data to the radio receiving module in the mine. Each receiving module sends the detection data to the mine monitoring and command center in the well through the bus. All detection data are stored in the EEPROM in the single-chip computer as digital values. In case of an accident, these data can be used as a reference for determining the cause of the accident. The mine monitoring and command center selects the location of the monitoring point (miner) through the radio transmission module arranged in a tic-tac-toe grid, and displays the detection parameters of all monitoring points (miners) and the location of each miner in a chart. In the event of an emergency, a graphic and sound alarm is issued. 3. Main advantages: (1) Wireless and wired transmission methods are used in the mine, and the monitoring and command center can understand various dynamic parameters and the location of each miner. (2) The radio transmission module controlled by the single-chip microcomputer has alarm displays such as vibration and light, so miners can easily find alarm signals in time. (3) When an accident occurs, all detection data are stored in the EEPROM, which is convenient for determining the cause of the accident. (4) All detection signals are processed by a single-chip microcomputer, which can monitor multiple parameters and has very low power consumption.

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Each miner carries a radio transmitter module controlled by a single-chip microcomputer. The output signals of various sensors are amplified by AD8051 operational amplifiers and sent to the MC68HC908LJ12 single-chip microcomputer with built-in digital/analog converter.