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EP0046006A2
Expired / Lapsed
EP
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Electromagnetic transducer
Assignee: ZF International UK Ltd
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Filing: 1981-06-30
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Granted: —
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Expires: 2001-06-30
Abstract
Abstract A variable reluctance transducer includes a C-shaped assembly (10) defining a magnetic circuit, one limb of the C being longer than the other. The assembly (10) is arranged with its limbs on opposite sides of a movable member (16). A winding (14) linked to the magnetic circuit is connected to a discriminating circuit including an integrator (A, R, C) having a variable bias circuit (D1, D2, R3, R2, C2, C2, A2, R4) which ensures that the peaks of the integrator output are in a predetermined relationship to a reference voltage. A comparator (A3) compares the integrator output with the reference voltage.
Inventors
- 👤 Gerald Barrington Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:25
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/2006; G01D5/2013
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
1 . An electromagnetic transducer of the kind specified including a discriminating circuit comprising an active integrating circuit connected to said winding and providing an output signal dependent on the integral of the signal produced by said winding, a variable bias circuit for the integrator which is sensitive to the output of the integrator and biases the input to the integrator so that the positive and negative excursions of the integrator output have a desired relationship to a reference voltage level and a voltage comparator connected to compare the integrator output with said reference voltage level.
Claim 2
Dependent Claim
96 words
1 . An electromagnetic transducer of the kind specified including a discriminating circuit comprising an active integrating circuit connected to said winding and providing an output signal dependent on the integral of the signal produced by said winding, a variable bias circuit for the integrator which is sensitive to the output of the integrator and biases the input to the integrator so that the positive and negative excursions of the integrator output have a desired relationship to a reference voltage level and a voltage comparator connected to compare the integrator output with said reference voltage level.
Claim 3
Dependent Claim
55 words
A transucer as claimed in Claim 1 in which the variable bias circuit comprises positive and negative peak detector circuits connected to the output of the integrator and means which combines the signals stored in the peak detectors and varies the integrator bias to maintain the positive and negative peak values in said desired relationship.
Claim 4
Dependent Claim
51 words
A transducer as claimed in Claim 1 in which the variable bias means comprises a biasing resistor connected to cause the integrator output to drift in a specific polarity direction to a limit level so that the maximum excursion of the integrator output in one polarity direction is said limit level.
Claim 5
Dependent Claim
29 words
A transducer as claimed in Claim 3 in which said biasing means includes a diode connecting the input of the integrator to its output to determine said limit level.
Claim 6
Dependent Claim
51 words
A transducer as claimed in Claim 3 or Claim 4, further comprising a single peak detector circuit connected to store the peak level of the excursion of the integrator circuit in the opposite direction, the reference voltage level being a predetermined fraction of the signal stored in said peak detector circuit.
Claim 7
Dependent Claim
48 words
An electromagnetic transducer of the kind specified in which the magnetic circuit is defined by a C-shaped assembly arranged so that the limbs of the C lie on opposite sides of the relatively movable member in a plane substantially perpendicular to the direction of movement of said member.
Claim 8
Dependent Claim
48 words
An electromagnetic transducer of the kind specified in which the magnetic circuit is defined by a C-shaped assembly arranged so that the limbs of the C lie on opposite sides of the relatively movable member in a plane substantially perpendicular to the direction of movement of said member.
Claim 9
Dependent Claim
20 words
A transducer as claimed in Claim 6 in which the two limbs of the C-shaped assembly are of different lengths.
References Cited (Backward Citations)
No citation records indexed.
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