Transformer probe

Details Transformer probe Transformer probe

2006-12-12

2006-12-12

Lee, Diane I. (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207110, C324S547000

Reexamination Certificate

active

07148679

ABSTRACT:
A probe (10) for sensing movement of a body of magnetic material comprises a magnetically energisable pole piece (30), a closed loop electrical circuit (20) having a first end (25) which is wound around the pole piece (30) and forms a pole piece coil (25) inductively coupled to the pole piece, the arrangement being such that movement of a body of magnetic material (70) relative to the pole piece (30)induces a current in the closed loop circuit (20), and a second end (45), remote from the pole piece (30), which forms a transformer primary coil. A transformer secondary coil (65) is inductively coupled to the primary coil (45), and terminated by a load resistance and means for measuring an output signal from the secondary coil. The primary (45) and secondary (65) coils form a transformer such that a current in the primary coil induces a voltage across the secondary coil. One or more shorting turns (60) of a conductor are inductively coupled to the primary (45) and secondary (65) coils.

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patent: 5642043 (1997-06-01), Ko et al.
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patent: 0 169 670 (1986-01-01), None
patent: 1 322 709 (1973-07-01), None

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