Electricity: measuring and testing – Magnetic – Displacement
Patent
1993-03-02
1996-01-02
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Displacement
32420721, 32420722, 324660, G01B 714, G01D 500
Patent
active
054811880
ABSTRACT:
A device is provided to measure and record the movement of an object according to a change in magnetic flux which changes as the object moves. The device contains a micro machine which has a rotation detection member, a driving gear which is formed coaxially with the rotation detection member, and a first detection plate which is also formed coaxially with the rotation detection member. The rotation detection member rotates according to the change in magnetic flux, and the rotation of the rotation detection member causes the driving gear and the first detection plate to rotate. The driving gear engages a follower gear, so as to form a gear train, and a second detection plate is formed coaxially with the follower gear and rotates when the follower gear rotates. First and second detecting elements are respectively disposed opposite the first and second detection plates, and the position of the object is determined by the relative respective positions of the first and second detection plates and the first and second detecting elements. In addition, the invention includes a method which is performed by the device.
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Mitsubishi Denki & Kabushiki Kaisha
O'Shea Sandra L.
Patidar Jay M.
Turner Richard C.
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