Title:
PASSAGE DETECTION DEVICE FOR MOVABLE BODY
Document Type and Number:
Japanese Patent JP2014139524
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a passage detection device for a movable body capable of surely transmitting radio waves for informing that a movable body has passed, and also capable of surely transmitting it to a signal processing unit.SOLUTION: A detection device for a movable body is buried underground and detects a movable body when it passes on the ground surface. A weight detection unit 1 in a detection part of tread pressure which detects that a movable body passes on the ground surface has: a magnet 5 for receiving the tread pressure; and a spring 6 for holding the magnet. A body 7 of the detection device for a movable body has: a Hall element 8 for detecting a magnetic field of the magnet; and an antenna 15 for radiating radio waves based on a detection signal from the Hall element. The antenna is provided inside a non-conductive material forming a body outer shell, a body inner shell 17 is formed by an aluminum case and electric components are provided in the aluminum case.
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Inventors:
ORIGASA ATSUSHI
SAEGUSA NOBUKI
TANAKA HIROAKI
SAEGUSA NOBUKI
TANAKA HIROAKI
Application Number:
JP2013008283A
Publication Date:
July 31, 2014
Filing Date:
January 21, 2013
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC
International Classes:
G01G3/15; F42B8/28