Durakool, Inc.

Other

American Electronic Components, Inc.

Dana Corporation

American Electronics Components, Inc.

Ronald J Wolf

Larry Hedeen

Martin James Lynch

Max W Garwood

Mark William Austin

Craig R Graf

John Richard Nuss

A position sensor including a rotatable shaft, a first threaded member, a second threaded member, at least one magnet, and at least one magnetic flux detection device. The first threaded member is connected to the rotatable shaft. The second threaded member is threadably engaged with the first threaded member. The at least one magnet is connected to the second threaded member. The at least one magnetic flux detection device is positioned to detect a magnetic field from the at least one magnet.

Position sensor

A position sensor for sensing an angular position including at least two magnetic conductive structures, at least two magnets, a magnetic flux responsive device, and an arcuate magnet. The at least two magnetic conductive structures include a first magnetic conductive structure and a second magnetic conductive structure. The first magnetic conductive structure is substantially arcuately parallel with the second magnetic conductive structure. The at least two magnets include a first magnet and a second magnet. The first magnet being magnetically coupled with the first magnetic conductive structure and with the second magnetic conductive structure. The second magnet being magnetically coupled with both the first magnetic conductive structure and the second magnetic conductive structure. The magnetic flux responsive device is constrained to travel a path that is partially located between the first magnetic conductive structure and the second magnetic conductive structure. The path extends beyond at least one of the at least two magnets. The arcuate magnet is positioned concentrically with the path.

Rotary position sensor

A position sensor for sensing linear or radial position including at least two magnetic conductive structures, at least two magnets and a magnetic flux responsive device. The at least two magnetic conductive structures, include a first magnetic conductive structure and a second magnetic conductive structure. The first magnetic conductive structure being substantially parallel with the second magnetic conductive structure. The at least two magnets, including a first magnet and a second magnet. The first magnet being in contact with the first magnetic conductive structure and with the second magnetic conductive structure. The second magnet being in contact with both the first magnetic conductive structure and the second magnetic conductive structure. The magnetic flux responsive device constrained to travel a path that is partially located between the first magnetic conductive structure and the second magnetic conductive structure, with the path extending beyond at least one of the at least two magnets.

A sensor system including a sensor having at least one magnet and a plurality of magnetic flux responsive devices fixedly adjacent to the at least one magnet. Each of the plurality of magnetic flux responsive devices have a primary sensing plane, at least two of the primary sensing planes being offset from each other. A quadrature normalization circuit is communicatively connected to the sensor.

Quadrature output sensor system

The present invention is directed to a resin ceramic composition that includes a ceramic filler in an amount effective for providing a single composition with a magnetic field of at least one gauss.

Resin ceramic compositions having magnetic properties

A position sensor for sensing linear or radial position, including at least four magnets, a first ferrous plate having at least two of the at least four magnets located at spaced locations along the first ferrous plate, the at least two magnets being oriented such that a north pole of at least one of the at least two magnets is directed toward the first ferrous plate and a south pole of an other of the at least two magnets is directed toward the first ferrous plate, a second ferrous plate having at least two of the at least four magnets located at spaced locations along the second ferrous plate, the at least two magnets being oriented such that a north pole of at least one of the at least two magnets is directed toward the second ferrous plate and a south pole of an other the at least two magnets is directed toward the second ferrous plate, the first ferrous plate and the second ferrous plate being generally parallel and spaced apart and at least one magnetic flux responsive device disposed between the first ferrous plate and the second ferrous plate.

An electronic circuit for automatically compensating for errors in the output signal of a displacement sensor. The electronic circuitry includes an analog to digital converter for converting an analog output signal from a linear displacement type sensor. The digital output signal from the sensor is processed by a microcontroller which automatically compensates for errors in the output signal. Ideal values, stored in an electronic memory, are used for compensation.

Electronic circuit for automatic DC offset compensation for a linear displacement sensor

A sensor assembly senses one of position, velocity, acceleration or change of acceleration. The assembly includes at least one magnet having a north and south pole and a magnetic axis defined therebetween; a magnetic flux responsive device, the at least one magnet being fixedly adjacent to the magnetic flux responsive device; and a ferrous target selectively movable relative to the at least one magnet.

Position sensor assembly utilizing magnetic field variations

Electric circuit for automatic slope compensation for a linear displacement sensor

An electronic circuit dynamically compensates a sensor output signal subject to varying conditions. In particular, the circuitry dynamically determines the DC offset level of an incoming sensor analog output signal. The DC amplitude or offset level varies as a result of changing conditions, such as speed, airgap, alignment and temperature. The circuitry compares the DC offset level with the original sensor analog output signal by way of a comparator to provide a digital output signal with a zero DC offset, which compensates for the varying conditions.

Electronic circuit for automatic compensation of a sensor output signal

A gear tooth sensor having increased sensitivity and temperature tolerance enables relatively small ferrous targets to be detected, which lends itself for use in relatively compact applications, such as the sensing of an automotive cam shaft drive wheel. All of the embodiments include a magnet having opposing north and south pole faces and a single input Hall effect IC which defines a sensing plane, and may include one or more flux concentrators. In one embodiment the sensor is configured such that the magnet is disposed adjacent the periphery of the target wheel such that the magnetic axis is generally parallel to the direction of travel of the ferrous target at an instant when the ferrous target is adjacent the magnet. In this embodiment, the Hall effect IC and flux concentrator are disposed adjacent one side of the ferrous target wheel and at least partially below the magnet. In one alternate embodiment of the invention, the magnet, Hall effect IC and flux concentrator are all aligned and disposed such that the magnetic axis is generally parallel to the direction of travel of the ferrous target at an instant when the ferrous target is adjacent the magnet. As such, the alternate embodiment is adapted to be configured relative to the ferrous target wheel for different applications. In both embodiments, additional flux concentrators can be included for adjusting the operate points of the Hall effect IC's. In yet other embodiments, the sensor is configured such that the sensing plane of the IC is generally perpendicular to the magnetic axis.

Gear tooth sensor with improved resolution and stability

A rotary position sensor for sensing the angular position of a pivotally mounted device, such as a throttle valve. The rotary position sensor includes a generally circular magnet with a central aperture. A magnetic sensing element, such as a Hall effect integrated circuit (IC) is disposed within the aperture to reduce the overall size of the sensor. In order to improve performance of the sensor, one or more flux concentrators are disposed adjacent the magnetic sensing element within the central aperture of the magnet, while keeping the overall size of the sensor to a minimum to enable the sensor to be utilized in applications where space requirements are generally critical, such as automotive applications.

Growing community of inventors

Elkhart, IN, United States of America

Ronald J Wolf