Title:
DEVICE AND METHOD OF DETECTING SNOW JAM
Document Type and Number:
Japanese Patent JP3420130
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stably detect a snow jam, preventing the flow loss of a waterway.
SOLUTION: When a snow jam 12 flows in a waterway 11, line illumination (an illuminator) 13 (focusing illumination such as line spot illumination in which spot-shaped illumination is arranged, the scanning illumination (containing polygon mirror utilization) of laser beams, fan-shaped laser beams (laser fan beams) or the like as an occasion calls) are used, scattered light by the snow jam 12 is picked up by a camera (a line camera or an area camera) 14, and the snow jam 12 is detected by detecting scattered-region size. Light transmitted and scattered by the snow jam 12 may be picked up by the camera 14 and detected by irradiation with focused light towards a water surface from the inside of the waterway 11.
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Inventors:
Kenichi Matsumura
Hirofumi Matsuura
Hirofumi Matsuura
Application Number:
JP24278999A
Publication Date:
June 23, 2003
Filing Date:
August 30, 1999
Export Citation:
Assignee:
NEC
NEC Robot Engineering Co., Ltd.
NEC Robot Engineering Co., Ltd.
International Classes:
E02B5/00; E02B9/04; (IPC1-7): E02B9/04; E02B5/00
Domestic Patent References:
| JP8159006A | ||||
| JP2274912A |
Attorney, Agent or Firm:
Masahiko Desk (2 outside)