Arrangements for detecting rotational or translatory movement and the direction thereof
First Claim
1. An arrangement for detection of a rotational movement of a rotary drive having a rotational axis comprising,a signal-generating element nonrotatably connected to the rotary drive, the signal generating element having uniformly disposed segments of different magnetic polarity, and an analog, magnet-sensitive sensor element having a sensitive surface, wherein the signal-generating element and the sensor element are arranged, such that during rotation of the rotary drive, the sensor element generates signal pulses that have a rising or falling waveform between their edges depending on the direction of rotation of the rotary drive, and such that when the direction of rotation is reversed, the sign of the waveform changes, wherein the signal-generating element is disposed concentrically on the rotational axis of the rotary drive and the sensor element is oriented away from a transverse orientation at least around an axis which runs parallel to the axis of rotation and is aligned such that the normal vector of the sensitive surface forms an angle relative to a vector pointing from the sensor element perpendicular to the axis of rotation of the signal-generating element.
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Abstract
The invention concerns arrangements for detecting a rotational or translatory movement between a signal-generating element having a symmetrical magnetic field and means for detecting the magnetic field of the signal-generating element. According to the invention, an analogue, magnet-sensitive sensor element is aligned such that the normal vector of the sensitive surface of the sensor element forms an angle to a vector pointing vertically from the sensor element perpendicularly to the axis of the signal-generating element. The sensor element generates signal pulses whose shapes between their edges are dependent on the direction of movement and rise or fall, such that, when the direction of movement is reversed, the sign of the signal shape changes. The invention proposes simple arrangements for detecting a rotational or translatory movement which requires only one sensor element yet has high resolution.
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Citations
14 Claims
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1. An arrangement for detection of a rotational movement of a rotary drive having a rotational axis comprising,
a signal-generating element nonrotatably connected to the rotary drive, the signal generating element having uniformly disposed segments of different magnetic polarity, and an analog, magnet-sensitive sensor element having a sensitive surface, wherein the signal-generating element and the sensor element are arranged, such that during rotation of the rotary drive, the sensor element generates signal pulses that have a rising or falling waveform between their edges depending on the direction of rotation of the rotary drive, and such that when the direction of rotation is reversed, the sign of the waveform changes, wherein the signal-generating element is disposed concentrically on the rotational axis of the rotary drive and the sensor element is oriented away from a transverse orientation at least around an axis which runs parallel to the axis of rotation and is aligned such that the normal vector of the sensitive surface forms an angle relative to a vector pointing from the sensor element perpendicular to the axis of rotation of the signal-generating element.
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8. An arrangement for detection of a translatory movement, comprising
a signal-generating element having segments of different magnetic polarity disposed alternatingly along a longitudinal axis, and an analog, magnet-sensitive sensor element having a sensitive surface, wherein the sensor element generates signal pulses that have a rising or falling waveform between their edges depending on the direction of movement, such that when the direction of movement is reversed, the sign of the waveform changes, wherein the sensor element is aligned such that a normal vector of the sensitive surface of the sensor element forms an angle with a vector pointing from the sensor element perpendicular to the longitudinal axis of the signal-generating element.
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13. An arrangement for detection of a rotational movement of a rotary drive having a rotational axis comprising,
a signal-generating element nonrotatably connected to the rotary drive, the signal generating element having uniformly disposed segments of different magnetic polarity, and an analog, magnet-sensitive sensor element having a sensitive surface, wherein the signal-generating element and the sensor element are arranged, such that during rotation of the rotary drive, the sensor element generates signal pulses that have a rising or falling waveform between their edges depending on the direction of rotation of the rotary drive, and such that when the direction of rotation is reversed, the sign of the waveform changes, wherein the signal-generating element is disposed concentrically on the rotational axis of the rotary drive and the sensor element is oriented away from a transverse orientation at least around an axis which runs parallel to the axis of rotation and is aligned such that, in a plane perpendicular to the axis of rotation, the normal vector of the sensitive surface forms an angle relative to a vector pointing from the sensor element perpendicular to the axis of rotation of the signal-generating element.
Specification