Title:
POSITION DETECTOR OF TRAVELLING OBJECT
Document Type and Number:
Japanese Patent JPS57155617
Kind Code:
A
Abstract:
PURPOSE:To detect the position of a travelling object with high accuracy, by carrying out the emission of light for an optical converter that produces the beams of different wavelengths on an optical trunk cable by means of an oscillator provided to the travelling object. CONSTITUTION:An optical trunk cable 8 is distributed along the shift line of a travelling object 10 such as a crane, etc., and a receiver 9 is connected to an end of the cable 8. The beam gathering parts 13 are provided to the cable 8 with every prescribed space, and a photo converter 12 is connected to each part 13 to produce the beams of different wavelengths from each other via an optical fiber 14. While the object 10 contains an oscillator 11 and carries out the emission of light for the converter 12 by the electric wave produced by the oscillator 11. The receiver 9 receives the beams of different wavelengths from the part 13, and the position of the object 10 is obtained from a pattern which is decided by the combination of plural photo detectors 12. As a result, a highly accurate detection is carried out for the position of the object 10.
Inventors:
MIYAZAWA SADAO
ENDOU SHIGERU
ENDOU SHIGERU
Application Number:
JP4076481A
Publication Date:
September 25, 1982
Filing Date:
March 20, 1981
Export Citation:
Assignee:
HITACHI CABLE
International Classes:
G05D3/12; G01D5/26; (IPC1-7): G05D3/12