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AssigneeMitsui Engineering & Shipbuilding Co., Ltd.
InventorsKoji Oka, Masujiro Hisatani, Hiroshi Imajo, Toru Takehara
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A sensor detects the presence or the absence of an obstacle by radiating a laser beam to the outside of a casing through a light projecting mirror and by letting the reflected light from an obstacle enter a light receiving element through a light receiving mirror. A light projecting window with a light projecting mirror positioned and a light receiving window with a light receiving mirror are positioned in the casing with a space therebetween to prevent reflected light from directly entering the light projecting window. The mirrors are attached to a rotation shaft of a motor, or rotation shafts of motors, synchronously rotatable provided between both mirrors. The optical axis of light radiated to the outside of the casing is set to face in a higher direction than horizontal to radiate in a cone-shaped form. By comparing a received light signal from a light receiving circuit to an output signal from a circuit for a previously set threshold, which has a correlation between detected distance and light intensity, a light receiving trigger is output. The distance is calculated when a signal is greater than the threshold. The presence or the absence of an obstacle is determined by the detection of reflected light intensity. This laser obstacle detection method and sensor, which can be used on an automated guided vehicle (AGV), will not misdetect rainfall as an obstacle.
A laser obstacle detection method that uses a sensor disposed in a casing for detecting the presence or the absence of an obstacle outside of the casing by radiating a laser light beam from a light source to the outside of the casing and when a potential obstacle is present receiving light reflected from the potential obstacle to a light receiving element disposed in the casing, the method comprising the steps of:
A laser obstacle detection sensor assembly for detecting presence of an obstacle using light radiated from a light source and reflected back from a potential obstacle, comprising:
A laser obstacle detection sensor assembly for detecting presence of an obstacle using light radiated from a light source and reflected back from a potential obstacle, comprising:
A laser obstacle detection sensor for detecting presence of an obstacle based on a light radiated from the sensor and reflected back to the sensor, comprising:
A laser obstacle detection sensor assembly for detecting presence of an obstacle using light radiated from a light source and reflected back from a potential obstacle, comprising:
A laser obstacle detection sensor assembly that detects the presence of an obstacle, comprising:
Dependencies are inferred from the claim text.