The invention discloses an automatic guide type spray irrigating
machine and a spray irrigating method for a
greenhouse. The spray irrigating
machine comprises a differential steering
chassis, a micro
control system, a
water supply system and a storage battery, wherein the differential steering
chassis includes a
vehicle frame, a left driving
system, a right driving
system and omnidirectional wheels, power is supplied to the left driving system and the right driving system through the storage battery to drive the spray irrigating
machine to travel. As the differential steering
chassis is employed, the spray irrigating machine can travel and steer automatically along with a guide line under the control of the micro
control system, without needing manual removal or special rail-based transfer; and during the travelling, water in a water tank is pumped by a water pump and is sprayed through a
nozzle to realize
spray irrigation; a
master controller is configured to calculate amount of deviation of the spray irrigating machine from the guide line during the travelling process and give a control command to control revolving speeds of a left
electric motor and a right
electric motor, so as to enable the spray irrigating machine to travel along the guide line all the time. The spray irrigating machine disclosed by the invention has the advantages that the labor intensity is reduced, the cost for
greenhouse construction and spray irrigating machine investment is lowered, the running distance of a single spray irrigating machine is not limited, the spray irrigating area for the
greenhouse is large, the structure is simple, the
automation degree is high and the practicality is strong.