Title:
STROKE DETECTION DEVICE, STROKE DETECTION METHOD, STROKE DETECTION SYSTEM, OPERATION LEVER UNIT, AND STROKE DETECTION SYSTEM FOR OPERATION LEVER
Document Type and Number:
WIPO Patent Application WO/2015/056595
Kind Code:
A1
Abstract:
A stroke detection device in which each of four pistons (40) arranged in a row in a device body (10) is provided with a rod part (41), the stroke detection device for detecting a change in relative positioning of the four pistons (40) when one or two of the pistons (40) have stroked with respect to the device body (10) in order to reduce electric power consumption and decrease the number of signal lines. In each rod part (41), a magnet (70) is disposed so that a magnetic field occurs in a space between mutually adjacent rod parts (41) on a circumference thereof and the magnetic field changes when the rod parts (41) have stroked relative to each other, and between magnets (70) adjacent to each other in the device body (10), a magnetic field detection sensor (71) is disposed for detecting the magnetic field between each of the magnets (70) and outputting an electrical signal corresponding to the orientation of the detected magnetic field.
Inventors:
KAGEYAMA MASATO (JP)
NAGAYA YOSHIYUKI (JP)
CHIKUGO HIROYUKI (JP)
FUJII DAIGOH (JP)
NAGAYA YOSHIYUKI (JP)
CHIKUGO HIROYUKI (JP)
FUJII DAIGOH (JP)
Application Number:
PCT/JP2014/076706
Publication Date:
April 23, 2015
Filing Date:
October 06, 2014
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
G01B7/00; G01D5/12; G01D5/14
Foreign References:
| JP2007107696A | 2007-04-26 | |||
| JPH07317948A | 1995-12-08 | |||
| JP2007526970A | 2007-09-20 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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