# US 10,481,596 B2 · Control device and control system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,481,596 B2
- Document ID: US10481596B2
- Status: Granted
- Kind: B2
- Application number: 15/664,213
- Filed: 2017-07-31
- Published: 2018-02-08
- Granted: 2019-11-19
- Earliest claimed: 2016-08-08
- Assignees: Fanuc Corporation
- Applicants: Fanuc Corporation
- Inventors: Soichi Arita
- Web page: https://patentgrep.com/patent/US10481596B2

## CPC

- 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}
- G05B 19/4185: {characterised by the network communication}
- G05B 2219/25022: LAN local area network for controllers
- 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)

## Abstract

A control device includes a receiving unit that receives output signals from a plurality of manufacturing machines, via a communication network; a noise-component extracting unit that extracts a common noise component that is contained in the output signals; and a noise-component removing unit that removes the extracted noise component from at least one of the output signals.

## Claims

### Claim 1

A control device, comprising:
a receiving unit that receives output signals from a plurality of manufacturing machines, via a communication network;
a noise-component extracting unit that extracts a common noise component contained in the output signals; and
a noise-component removing unit that removes the extracted noise component from at least one of the output signals,
wherein the noise-component extracting unit extracts the common noise component by selecting, from frequency spectra corresponding to each of the output signals, power that has the minimum value at each frequency to generate a common-power spectrum and applying a high-pass filter to the common-power spectrum.

### Claim 2 (depends on 1)

A control device according to claim 1, further comprising an abnormality detecting unit that is configured to detect an abnormality in the plurality of manufacturing machines based on the output signals from which the common noise component has been removed by the noise-component removing unit.

### Claim 3 (depends on 1)

A control device according to claim 1, further comprising:
a filter processing unit that applies filter processing to the output signals from which the extracted noise component has been removed by the noise-component removing unit; and
an abnormality detecting unit that is configured to detect an abnormality in the plurality of manufacturing machines based on the output signals to which the filter processing has been applied by the filter processing unit.

### Claim 4 (depends on 1)

A control device according to claim 1, wherein the output signals contain outputs from encoders that are respectively provided in the plurality of manufacturing machines or current commands for motors that are respectively provided in the plurality of manufacturing machines.

### Claim 5 (depends on 1)

A control device according to claim 1, wherein the output signals contain outputs from external sensors that are respectively provided on the plurality of manufacturing machines.

### Claim 6 (depends on 1)

A control system comprising:
a control device according to claim 1; and
the plurality of manufacturing machines connected to the control device via the communication network.