Contact displacement detector and sensor
First Claim
1. A circuit for a displacement detector having a sensor incorporating a differential transformer, said circuit comprising:
- driver means for generating a driving signal for driving said differential transformer;
standard signal processing means for processing said driving signal and thereby outputting a standard signal;
output signal processing means for processing signals outputted from said differential transformer;
differential amplifier means for carrying out differential amplification of said standard signal and the output signal from said output signal processing means; and
amplitude adjusting means for adjusting the amplitude of said driving signal to a constant value by feeding back said standard signal to said driver means.
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Accused Products
Abstract
A displacement detector has a contact sensor incorporating a differential transformer and a circuit for adjusting the amplitude of the driving signal for driving a differential transformer of the sensor by feeding back as a standard signal the driving signal through an amplifier and an AC-DC converter as a standard signal. The sensor has a housing containing a mobile member. The mobile member has a shaft with a hole. An outer tubular body of a linear bush and a ball guide each have a hole, and a pin is inserted through these holes movably in the direction of movement of the mobile member such that the rotation of the mobile member is prevented.
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Citations
17 Claims
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1. A circuit for a displacement detector having a sensor incorporating a differential transformer, said circuit comprising:
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driver means for generating a driving signal for driving said differential transformer;
standard signal processing means for processing said driving signal and thereby outputting a standard signal;
output signal processing means for processing signals outputted from said differential transformer;
differential amplifier means for carrying out differential amplification of said standard signal and the output signal from said output signal processing means; and
amplitude adjusting means for adjusting the amplitude of said driving signal to a constant value by feeding back said standard signal to said driver means. - View Dependent Claims (2, 3, 4)
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5. A circuit for a displacement detector having a sensor incorporating a differential transformer, said circuit comprising:
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driver means for generating a driving signal for driving said differential transformer;
standard signal processing means for processing said driving signal and thereby outputting a standard signal;
output signal processing means for processing signals outputted from said differential transformer;
amplitude adjusting means for adjusting the amplitude of said driving signal to a constant value by feeding back said standard signal to said driver means, said amplitude adjusting means being provided with a standard value corresponding to the kind of said differential transformer; and
differential amplifier means for carrying out differential amplification of said standard signal and the output signal from said output signal processing means.
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6. A contact displacement sensor comprising:
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a housing defining an axial direction;
a differential transformer having a core member;
a linear bush inside said housing, said linear bush having an outer tubular body in said axial direction and a holder which is movable in said axial direction;
a mobile member having a mobile shaft supporting said core member of said differential transformer, said mobile member being movable in said axial direction, said mobile shaft having a pin-accepting hole part;
a contact member at a front end part of said mobile shaft;
a spring outwardly biasing said mobile member;
rotation-preventing means for preventing rotation of said mobile member, said rotation-preventing means including a rotation-preventing member, said outer tubular member and said holder each having a hole, said rotation-preventing member being inserted movably in said axial direction into the holes through said outer tubular member and said holder and into said pin-accepting hole part. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification