The invention discloses an automatic dust-fall spray
control system for a tunnel, and a control method thereof. The
system is composed of a dust sensor, a data processor, a control host, a cloud
monitoring system and a water spraying device; through arrangement of a dust monitor in a tunnel operation area, a
signal is transmitted to a control center and the cloud
monitoring system; dust concentration warning values of at least two different levels are preset; when the dust concentration of a
monitoring site reaches or exceeds the warning values of different levels set through the dust sensor,a
solenoid valve of the water spraying device is controlled to open for spraying water to a workplace for
dust fall; and through control over different opening degrees of the
solenoid valve and different
water flow rates corresponding to the warning values of different levels, dust of the workplace is reduced. According to the
control system, through setting of multilevel warning thresholds, harmsare restrained at the
embryonic stage; the
system is improved through the process that the
signal is transmitted to a water valve, and the purpose that different warning values correspond to different flow and flow rates for
dust fall is achieved; and resources are saved, and targeted
dust fall is performed.