Tunnel environment monitoring devices

The utility model discloses a tunnel environment monitoring devices, including main control unit, its characterized in that: the last electric connection of main control unit has fiber coupler, signal amplifier, two closed loop PID circuit, tertiary LED lamp and liquid crystal display, it is continuous with temperature and humidity sensor, dust concentration detector, gas sensor's signal conversion output respectively that the fiber coupler input passes through the optical cable, the signal amplifier output links to each other with main control unit PWM port electrical property, two closed loop PID circuit three -phase output terminal link to each other with BLDCM stator three -phase winding electrical property, the BLDCM output links to each other with the ventilation flabellum. The utility model discloses the performance is good in the use, system control is stable, realized the tunnel in light brightness according to the tunnel degree of depth and sunshine illumination intensity's change and automatically