JP2533785B

PURPOSE:To enable the detection of a position and a bearing of a moving object free from any obstacle intercepting light existing within a moving range thereof, by selecting a combination of minimizing computing errors from those only containing a light reflecting means which has received reflected light. CONSTITUTION:At least four or more of corner cubes A-H are set outside a moving range of a moving object 20, which is divided into a plurality of areas, and a combination of three selected from the cubes A-H for calculating a position and bearing of the moving object 20 are previously stored into a computing means CPU 34 in the order of less computing errors in the position and bearing of the moving object 20 for each area. Then, positional information of the cubes A-H is set by a host computer 42 to be inputted into the CPU 34 through an interface 33. Then, the CPU 34 performs a computation based on positional information of eight cubes A-H and angle signals from the cubes A-H receiving light not intercepted thereby detecting the position and bearing of the moving object 20.