Title:
LIGHT RECEIVING APPARATUS OF TRACK CORRECTING MACHINE
Document Type and Number:
Japanese Patent JPS63246608
Kind Code:
A
Abstract:
PURPOSE:To enhance the efficiency of track correcting work, by performing track correcting work by making 'level OK display' and 'light reception OK display' a condition therefor. CONSTITUTION:A light receiving apparatus is constituted of a light receiving part 1a, a control part 1b and a display part 1c. When the height from the top surface of the head of a rail to the center of the light receiving part 1a coincides with the height of a reference line, the outputs of photodetectors 1d, 1e become almost equal and a transistor Tr1 is turned ON by the output of the first level judging comparator 2 and a level OK display device 23 performs level OK display. The second comparators 24a, 24b detect that the outputs of the photodetectors 1d, 1e are larger than a threshold value and a transistor Tr2 is turned ON by this detection and a light reception OK display device 25 performs light reception OK display.
Inventors:
KAMETANI HAJIME
HARA AKIRA
HARA AKIRA
Application Number:
JP7739087A
Publication Date:
October 13, 1988
Filing Date:
April 01, 1987
Export Citation:
Assignee:
SHIBAURA ENG WORKS LTD
International Classes:
G01C5/00; E01B35/00; G01C15/00; (IPC1-7): E01B35/00; G01C5/00; G01C15/00
Attorney, Agent or Firm:
Mitsuharu Kiuchi
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