Title:
POSITION DETECTION DEVICE
Document Type and Number:
Japanese Patent JPH04296602
Kind Code:
A
Abstract:
PURPOSE:To precisely and certainly detect position of a moving body. CONSTITUTION:A piston position detection device 10 is arranged in the neighbourhood of a piston 92 provided with a magnet 1 and detects position of the piston 92 in accordance with magnetic field strength from the magnet 1 which changes according to movement of the piston 92. An MR element chip 20 made by way of forming an amorphous magnetic thin film 30 on the back face of a glass substrate forming an MR element pattern on its surface is installed on the back face of a print substrate 60 provided with a detection circuit 62 on its surface. As an electrical property of the MR element pattern changes in accordance with magnetic field strength induced by the amorphous magnetic thin film 30, it is possible to obtain MR output voltage according to movement of the piston 92 and accordingly, it is possible to precisely and certainly detect position of the piston 92.
Inventors:
ITO NAGAKATSU
TAMURA AKIRA
TAMURA AKIRA
Application Number:
JP6207591A
Publication Date:
October 21, 1992
Filing Date:
March 26, 1991
Export Citation:
Assignee:
CKD CORP
International Classes:
G01B7/00; G01D5/18; (IPC1-7): G01B7/00
Domestic Patent References:
| JPS63122276U | 1988-08-09 |
Attorney, Agent or Firm:
Adachi Tsutomu
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