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Avago Technologies International Sales Pte. Limited

Avago Technologies General IP (Singapore) Pte. Ltd.

Mitec-Moderne Industrietechnik Gmbh

Avago Technologies General IP Pte, Ltd.

Mehnert, Walter

Theil, Thomas

Mehnert, Walter, Dr.

Thomas Theil

Walter Mehnert

Kheng Hin Toh

Heem Leong Ong

Wei Keat Yew

Childs Chang

Novel tools and techniques are provided for implementing an encoder capable of performing a self-correction process, and more particularly methods, systems, and apparatuses are provided for implementing an encoder capable of performing a process to correct itself during operation of the encoder. In various embodiments, the encoder includes an exciter and a sensor capable of detecting a position of the exciter and generating a signal based on the position of the exciter. The encoder can then perform one or more steps to detect at least one of a first error in an offset of the signal, a second error in a gain of the signal, or a third error in a phase of the signal as the exciter is rotating and correct the signal from the sensor based on the detection of at least one of the first error, the second error, or the third error.

Automatic stabilization of encoders

An electronic pacemaker for implantation in a body of a living being including an electrode portion that is configured to be attached to a body portion; an electronics assembly connected with the electrode portion, configured to generate a voltage impulse emitted via the electrode portion to the body portion; a rechargeable accumulator to supply the electronics assembly with electrical energy; and a charging impulse generation portion electrically connected to the accumulator, configured to emit a charging impulse to the accumulator for the recharging of the accumulator. The charging impulse generation portion includes a magnetization portion with oriented magnetic domains which can be contactlessly influenced by an changing magnetic field so that, when a certain field strength is reached, a remagnetization wave, caused by the continuously reversing magnetic domains, occurs in the magnetization portion which runs across the magnetization portion and leads to the generation of the charging impulse.

Electronic pacemaker

The invention relates to an integrated circuit arrangement for a position sensor for measuring angles or distances, wherein the circuit arrangement comprises:

Integrated circuit arrangement for a position sensor using hall elements

The invention relates to a counting sensor for counting the number of rotations or of linear displacements of an object, wherein the counting sensor comprises:

Counting sensor having a correction function

A position sensor is disclosed for determining the number of repeating courses of movement of an object and of the precise position of the object in relation to a reference position. The position sensor is disclosed to include a Wiegand module, which is composed of a Wiegand wire having a coil that surrounds the Wiegand wire; a magnetic temporary storage, which is in addition to the Wiegand module; a first sensor element and a second sensor element; a processing electronic circuit, which is configured to evaluate or to determine an output signal that is output by the sensor elements and an information that is stored in the magnetic temporary storage; and a permanent magnet arrangement, which is movable relatively to the Wiegand module in one direction as well as in a direction that is opposite to said one direction.

Magnetic absolute position sensor having a wiegand module

The present disclosure relates to an absolute position sensor. In one example, the absolute position sensor includes a Wiegand module and a control electronic that enable the absolute position sensor to operate in either a non-autonomous mode or an autonomous mode. In the autonomous mode there is no external energy available and a position sensor is supplied with energy by the Wiegand module.

Magnetic absolute position sensor having a Wiegand module

A position detector is disclosed that is capable of operating in an autonomous mode or non-autonomous mode. As an example, in the autonomous mode, the position detector is not supplied with external energy, but rather receives energy from a Wiegand module thereby enabling the position detector to obtain information about movement of an object.

Position detector configurable to operate in an autonomous mode or non-autonomous mode

The invention relates to a counting sensor for counting the number of revolutions or of linear displacements of an object, wherein the counting sensor comprises:

Counting sensor for counting the number of revolutions or of linear displacements of an object

The invention relates to a magnetic linear or rotary encoder () for monitoring the motion of a body, comprising: an exciting unit (), which reproduces said motion and has at least one pair of primary permanent magnets (), which are arranged opposite one another and are magnetically connected to one another by means of a ferromagnetic yoke body () and form a measurement field space therebetween; a fine-resolution sensor unit ('), which is used to determine a fine position value, is arranged in a stationary manner and has a plurality of magnetic field sensors (); and processing electronics, which evaluate the signals of the fine-resolution sensor unit and have a data memory. Said magnetic linear or rotary encoder is characterised in that a ferromagnetic deflecting body () is provided, which deflects at least some of the magnetic field lines of the magnetic field produced by the primary permanent magnets in a direction perpendicular to the magnetisation vector of the primary permanent magnets, that the fine-resolution sensor unit is designed and arranged in such a way that the individual magnetic field sensors of the fine-resolution sensor unit are penetrated by the magnetic field lines deflected by the deflecting body by means of a perpendicular component, that at least the yoke body is made of a thermally treated, ferromagnetic material, and that the fine-resolution sensor unit does not contain a ferromagnetic component.

Magnetic linear or rotary encoder

A method and an arrangement for performing the method for the error-free conversion of the counting values of a segment counter including Wiegand sensors and the position values of a fine position sensor into a total position value using the last magnetization direction of the Wiegand wire of a segment counter as part of the information for an absolute synchronization of counting and position values. The method further includes detecting a magnetization direction of the Wiegand wire on the basis of a combination of the magnetization direction, the last stored counting value of the segment counter, and information of the fine position sensor about the current.

Method and arrangement for synchronizing a segment counter with a fine position sensor

A position sensor for ascertaining the fine position value z of a movable body includes an exciter unit moving therewith and a stationary sensor unit () which simultaneously delivers a plurality of output signals jointly describing the fine position value. In a calibration mode there is established a defined relationship between the exciter unit and a calibration unit () such that groups of amplitude values can be taken off from said output signals and groups of average values are formed therefrom, which are fed to the calibration unit () which converts them into reference values using the calibration fine position values &#x3bc;(z) and stores same with the associated fine position as an associated values multiplet in a comparative value memory (). In each measuring mode groups of amplitude are taken off from the output signals from which groups of measuring values are produced by averaging and are fed to a computing unit (), which forms differences of cross products from the reference values of varying groups of reference values and the current measuring value group and causes said differences to go towards zero to ascertain the current fine position value.

Method of and apparatus for ascertaining the fine position value of a movable body

A magnetic rotary encoder for the fine resolution of the rotational angle of a shaft () includes an exciter unit which images the rotation to be monitored and rotates about an axis of rotation (), a stationary fine resolution sensor unit () for fine resolution of each revolution, and an electronic processing means. It is characterized in that the exciter unit includes two first permanent magnets () which are disposed symmetrically with respect to the axis of rotation at a mutual spacing such that their magnetization vectors () which extend through their respective center of gravity extend in the same direction in relation to the common field lines and form a central field space () which directly connects the permanent magnets, and at least the fine resolution sensor unit is so arranged that it can use the field () of the central field space for measurement.

Magnetic rotary encoder

An absolute high resolution linear segment or revolution counter as a one-chip-solution with self sustained, economical intermediate solutions, preferably as absolute magnetic multi turn, having a Wiegand element for counting the revolutions or segments, respectively and for the energy supply of the counter and memory as well as processing electronics, whereby the additional sensor for the fine resolution and a &#x3bc;-controller are part of the overall IC is disclosed.

Absolute high resolution segment or revolution counter

Absolute counters for linear segments or revolutions having a Wiegand element (WE) in the main field between two opposite excitation magnets (EM, EM) connected by a common ferromagnetic back connection body (), and an additional sensor element (SE) for determining the information about the polarity and the position of the excitation magnet, wherein the output signals of the Wiegand element (WE) simultaneously supplies energy for the required counter and logic electronics, as well as having an additional sensor (ZS) for the fine resolution in the frame work of a multi-turn which also lies within the main field between the excitation magnets (EM, EM).

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Feldafing, Germany

Thomas Theil