Wireless monitoring device for coal mine gas

The utility model discloses a wireless monitoring device for coal mine gas, and belongs to the technical field of coal mine safety production. The wireless monitoring device solves the problems that a wired gas monitoring system is limited in monitoring position and great in maintenance difficulty. The wireless monitoring device comprises a power supply module, a gas signal detection processing module, a singlechip and a GPRS (general packet radio service) data transmission circuit, wherein the gas signal detection processing module comprises a gas sensor, a signal amplifier and an A/D (analog-to-digital) conversion circuit; a gas signal output end of the gas sensor is connected with an input end of the signal amplifier; an output end of the signal amplifier is connected with an analog signal input end of the A/D conversion circuit; a digital signal output end of the A/D conversion circuit is connected with an input end of the singlechip; a gas data output end of the singlechip is connected with an input end of the GPRS data transmission circuit; an output end of the GPRS data transmission circuit sends gas data out as a short message; and the power supply module supplies power for the gas sensor, the singlechip and the GPRS data transmission circuit.