Position detection system

Abstract

Abstract PURPOSE:To detect a target position when a moving body such as an automobile moves and to display the detected target position on the screen of a display device where a map is set previously together with the current position of the moving body, by mounting an inertial navigation device and a direction detector on the moving body, and calculating the absolute position of a desired fixed station on the basis of the present position of the moving body in the 2nd direction detection. CONSTITUTION:A signal processor 7 updates given data to the present position and moving direction of the moving body and also stores and holds them in its internal memory. The moving body sends a radio wave transmission request to the fixed station at two positions in the middle of the movement of the moving body by utilizing mobile telephony, the direction detector 5 detects the arrival direction of a radio wave sent from the fixed station in response to the request, and each detection result is supplied to the signal processor 7. The signal processor 7 finds the intersection of the detected directin lines of the fixed station and calculates the absolute positon (x', y') of the fixed station on the same X-Y coordinates on the basis of the current position of the moving body in the 2nd direction detection, thereby storing and holding the data on the found position in the internal memory.

Inventors

• 👤 Eiji Murao
• 👤 村尾　英治
• 👤 Katsuhiko Takebe
• 👤 克彦 武部
• 👤 Yasushi Okada
• 👤 岡田　泰仕

Bibliographic Details