Being the projection control manner where projection control manner, the projection control unit, the projection target detection device of the body

摘要

PROBLEM TO BE SOLVED: To avoid erroneous detection of the shape and presence of a vehicle by making different the projection timings of a plurality of light projectors having a common projecting area. ;SOLUTION: A controller 30 outputs projection timing signals S11-S1n (S1) of different timings from light projector elements 34 (341-34n) to sensor processors 32 (321-32n), a timing signal, generator 40 of the sensor processor 32 generates a drive clock S2 with a specified time delay for the projector element 34 and address clocks S3 for an address generator 42 and A/D converter 38 from the projection timing signal S1 according to the input of the projection timing signal S1, an SOS circuit 44 inputs a reference position signal of a polygon mirror to the address generator 42 to generate a memory address S6, and a memory 46 stores addresses corresponding to received light data. Thus it is possible to accurately detect the shape and existence of the light beam at detecting, without mutual interference of the light beams at their common projection area.;COPYRIGHT: (C)1999,JPO