POSITION DETECTION DEVICE

WIPO Patent Application WO/2023/157601

A1

A position detection device includes a first support, a second support that moves relatively to the first support, a power generation sensor disposed on the first support, and a magnetic field generation source fixed to the second support so that a plurality of magnetic poles of the same polarity sequentially enter a detection area of the power generation sensor along a path passing through the detection area as the second support relatively moves. The power generation sensor includes a magnetic wire exhibiting the large Barkhausen effect, a coil wound around the magnetic wire, and a first magnetic flux-conducting piece and a second magnetic flux-conducting piece magnetically coupled to both ends of the magnetic wire, respectively and having magnetic flux-conducting ends that face the detection area. The coil of the power generation sensor generates a positive-voltage pulse in a first state in which magnetic flux from the magnetic poles of the magnetic field generation source is conducted from the first magnetic flux-conducting piece and generates a negative-voltage pulse in a second state in which the magnetic flux from the magnetic poles of the magnetic field generation source is conducted from the second magnetic flux-conducting piece.

OZEKI SAKAO (JP)
HOUDA AKIHIKO (JP)
SOMEYA MASAYUKI (JP)

PCT/JP2023/002507

August 24, 2023

January 26, 2023

Click for automatic bibliography generation  

ORIENTAL MOTOR CO LTD (JP)
OZEKI SAKAO (JP)

G01D5/245; G01D5/244

JP2016504906A	2016-02-12
JP2021021706A	2021-02-18
JP2000101401A	2000-04-07
JP2021021705A	2021-02-18

AI ASSOCIATION OF PATENT AND TRADEMARK ATTORNEYS (JP)

View/Download PDF      PDF Help

Previous Patent: POLARIZED LIGHT SEPARATION ELEMENT AND OPTICAL RECEPTION DEVICE

Next Patent: LIGHTING DEVICE