# US 10,866,079 B2 · Position sensing device

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- Number: US 10,866,079 B2
- Document ID: US10866079B2
- Status: Granted
- Kind: B2
- Application number: 16/411,351
- Filed: 2019-05-14
- Published: 2019-11-14
- Granted: 2020-12-15
- Earliest claimed: 2018-05-14
- Assignees: Melexis Technologies SA
- Applicants: Melexis Technologies NV
- Inventors: Gunnar Munder; Peter Teichmann
- Web page: https://patentgrep.com/patent/US10866079B2

## CPC

- G01B 7/003: {for measuring position, not involving coordinate determination (coordinate measuring G01B7/004)}
- G01D 5/2013: {by a movable ferromagnetic element, e.g. a core (G01D5/2033 takes precedence)}
- G01D 1/16: giving a value which is a function of two or more values, e.g. product or ratio
- G01D 5/2053: {by a movable non-ferromagnetic conductive element}
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR

## Abstract

A device for position sensing comprises sensing means arranged for producing at least two sensor signals, and a signal construction unit. The signal construction unit comprises selection means for selecting in a serial way one of at least two time-synchronous signals, sampling means for sampling a selected time-synchronous signal at given sampling instants, storage means for storing sampled data representing the selected time-synchronous signal and timing information indicating which of the given sampling instants were used to obtain the sampled data, and processing means for determining at one of the given sampling instants a value for at least one of said time-synchronous signals that was not sampled at the one given sampling instant by performing an interpolation using data values of the at least one time synchronous signal stored in the storage means and obtained at another point in time than the one given sampling instant.

## Claims

### Claim 1

A device for position sensing comprising:
sensing means arranged for producing at least two sensor signals,
a signal construction unit arranged for obtaining from said at least two sensor signals at least two time-synchronous signals and comprising:
selection means for selecting in a serial way one of said at least two time-synchronous signals,
sampling means for sampling said selected time-synchronous signal at given sampling instants,
storage means for storing sampled data representing said selected time-synchronous signal and timing information indicating which of said given sampling instants were used to obtain said sampled data,
processing means for determining at one of said given sampling instants a value for at least one of said time-synchronous signals that was not sampled at said one given sampling instant by applying an interpolation scheme using data values of said at least one time synchronous signal stored in said storage means and obtained at another point in time than said one given sampling instant.

### Claim 2 (depends on 1)

The device as in claim 1, wherein said sampling means is arranged for sampling at equidistant sampling times.

### Claim 3 (depends on 1)

The device as in claim 1, comprising a control unit arranged to control said sampling means.

### Claim 4 (depends on 3)

The device as in claim 3, wherein said control unit is arranged for setting a variable sampling time interval.

### Claim 5 (depends on 1)

The device as in claim 1, wherein said control unit is arranged for steering said selection means.

### Claim 6 (depends on 1)

The device as in claim 1, wherein said processing means is arranged for adapting said interpolation scheme being applied.

### Claim 7 (depends on 1)

The device as in claim 1, wherein said processing means is arranged for performing said interpolation scheme with only data values obtained by sampling.

### Claim 8 (depends on 1)

The device as in claim 1, wherein said interpolation scheme is a weighted sum of said data values.

### Claim 9 (depends on 8)

The device as in claim 8, wherein weights used in said weighted sum are dependent on said data values.

### Claim 10 (depends on 1)

The device as in claim 1, wherein said time-synchronous signals are periodic signals.

### Claim 11 (depends on 1)

The device as in claim 1, wherein said time-synchronous signals are differential signals.

### Claim 12 (depends on 1)

The device as in claim 1, with said sensing means being arranged for producing exactly three sensor signals.

### Claim 13 (depends on 1)

The device as in claim 1, wherein said processing means is arranged for calculation a position.

### Claim 14 (depends on 1)

The device as in claim 1, wherein said sensing means are inductive sensing means.

### Claim 15

A method for performing position sensing comprising:
obtaining at least two time-synchronous signals from at least two sensor signals,
selecting and sampling in a serial way one of said at least two time-synchronous signals and storing the sampled values along with their sampling instants in a memory,
calculating from a stored sampled value of one of said time-synchronous signals obtained at a given sampling instant interpolated values of the one or more other time-synchronous signals at said given sampling instant, the calculation being performed at a point in time later than said given sampling instant,
determining a position at said given sampling instant based on said calculating step.
