# US 2014/0195199 A1 · Synchronizing data from irregularly sampled sensors

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- Number: US 2014/0195199 A1
- Document ID: US20140195199A1
- Status: Published application
- Kind: A1
- Application number: 13/737,759
- Filed: 2013-01-09
- Published: 2014-07-10
- Earliest claimed: 2013-01-09
- Assignees: Honeywell International Inc.
- Inventors: Onder Uluyol
- Web page: https://patentgrep.com/patent/US20140195199A1

## CPC

- F03D 7/048: {controlling wind farms}
- G05B 23/0221: {Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods}
- F05B 2260/80: Diagnostics
- G05B 2219/2619: Wind turbines
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- F03D: WIND MOTORS
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A system and method include receiving a set of sampled measurements for each of multiple sensors, wherein the sampled measurements are at irregular intervals or different rates, re-sampling the sampled measurements of each of the multiple sensors at a higher rate than one of the sensor's set of sampled measurements, and synchronizing the sampled measurements of each of the multiple sensors.

## Claims

### Claim 1

A method comprising:
receiving a set of sampled measurements for each of multiple sensors, wherein the sampled measurements are at irregular intervals or different rates;
re-sampling the sampled measurements of each of the multiple sensors at a higher rate than one of the sensor's set of sampled measurements; and
synchronizing the sampled measurements of each of the multiple sensors.

### Claim 2 (depends on 1)

The method of claim 1 wherein re-sampling the sampled measurements includes removing samples for each of sets of sampled measurements for the sensors where a gap occurs in one sensor's set of sampled measurements.

### Claim 3 (depends on 1)

The method of claim 1 wherein a gap is defined as a time period that exceeds a threshold set for the sensor without a sampled measurement.

### Claim 4 (depends on 1)

The method of claim 1 wherein synchronizing the sampled measurements comprises combining measurements to obtain values at each of equal time intervals.

### Claim 5 (depends on 1)

The method of claim 1 wherein synchronizing the sampled measurements comprises interpolating measurements to obtain values at time stamps separated by equal time intervals.

### Claim 6 (depends on 5)

The method of claim 5 wherein an average of at least two measurements is used to obtain a value for a time stamp between the times of the two measurements.

### Claim 7 (depends on 1)

The method of claim 1 and further comprising using samples from a first sensor to filter re-sampled values corresponding to a second sensor.

### Claim 8 (depends on 1)

The method of claim 1 and further comprising combining samples from multiple sensors to filter re-sampled values corresponding to a sensor.

### Claim 9 (depends on 8)

The method of claim 8 wherein the sampled values from multiple sensors are combined using logical operators including AND, OR, and NOT.

### Claim 10

A computer readable storage device having recorded instructions for causing a computer to implement a method, the method comprising:
receiving a set of sampled measurements for each of multiple sensors, wherein the sampled measurements are at irregular intervals or different rates;
re-sampling the sampled measurements of each of the multiple sensors at a higher rate than one of the sensor's set of sampled measurements; and
synchronizing the sampled measurements of each of the multiple sensors.

### Claim 11 (depends on 10)

The computer readable storage device of claim 10 wherein re-sampling the sampled measurements includes removing samples for each of sets of sampled measurements for the sensors where a gap occurs in one sensor's set of sampled measurements.

### Claim 12 (depends on 10)

The computer readable storage device of claim 10 wherein a gap is defined as a time period that exceeds a threshold set for the sensor without a sampled measurement.

### Claim 13 (depends on 10)

The computer readable storage device of claim 10 wherein synchronizing the sampled measurements comprises combining measurements to obtain values at each of equal time intervals.

### Claim 14 (depends on 10)

The computer readable storage device of claim 10 wherein synchronizing the sampled measurements comprises interpolating measurements to obtain values at time stamps separated by equal time intervals.

### Claim 15 (depends on 14)

The computer readable storage device of claim 14 wherein an average of two measurements is used to obtain a value for a time stamp between the times of the two measurements.

### Claim 16 (depends on 10)

The computer readable storage device of claim 10 and further comprising using samples from a first sensor to filter re-sampled values corresponding to a second sensor.

### Claim 17 (depends on 10)

The computer readable storage device of claim 10 and further comprising combining samples from multiple sensors to filter re-sampled values corresponding to a sensor, wherein the sampled values from multiple sensors are combined using logical operators including AND, OR, and NOT.

### Claim 18

A system comprising:
a processor programmed to receive a set of sampled measurements for each of multiple sensors, wherein the sampled measurements are at irregular intervals or different rates;
wherein the processor is programmed to further re-sample the sampled measurements of each of the multiple sensors at a higher rate than one of the sensor's set of sampled measurements; and
wherein the processor is further programmed to synchronize the sampled measurements of each of the multiple sensors.

### Claim 19 (depends on 18)

The system of claim 18 wherein re-sampling the sampled measurements includes removing samples for each of sets of sampled measurements for the sensors where a gap occurs in one sensor's set of sampled measurements, and wherein a gap is defined as a time period that exceeds a threshold set for the sensor without a sampled measurement, and wherein the processor is programmed to synchronize the sampled measurements by interpolating measurements to obtain values at time stamps separated by equal time intervals.

### Claim 20 (depends on 18)

The system of claim 18 wherein the processor is further programmed to use samples from a first sensor to filter re-sampled values corresponding to a second sensor.