COMMUNICATION DEVICE, CONTROL METHOD OF COMMUNICATION DEVICE, EXTERNAL DEVICE, CONTROL METHOD OF EXTERNAL DEVICE, AND CONTROL SYSTEM

• US 20190332081A1
• Filed: 03/13/2019
• Published: 10/31/2019
• Est. Priority Date: 04/25/2018
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: NAKANO, Yoshimitsu, NOGAMI, Hidekatsu, KOEZUKA, Yahiro, KATAOKA, Arata
• Granted Patent: US 11,144,028 B2
• Time in Patent Office: Days
• CPC Class Codes: B25J 9/1676 Avoiding collision or forbidden zones
• CPC Class Codes: G05B 13/0265 the criterion being a learning criterion
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 19/05 Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
• CPC Class Codes: G05B 19/406 characterised by monitoring or safety G05B19/19 takes precedence
• CPC Class Codes: G05B 2219/1101 Remote I-O
• CPC Class Codes: G05B 2219/1133 Sensor actuator, asi, bus, network
• CPC Class Codes: G05B 2219/1181 Detection of I-O faults, shut down of I-O
• CPC Class Codes: G05B 2219/37494 Intelligent sensor, data handling incorporated in sensor
• CPC Class Codes: G05B 2219/37499 Determine cumulative deviation, difference
• CPC Class Codes: G05B 2219/37514 Detect normality, novelty in time series for online monitoring
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network

Abstract

The disclosure is provided to transmit a sensor value from a sensor to an external device with high efficiency. A sensor value of a sensor is acquired, basic data as time-series data is generated with reference to the acquired sensor value, differential data indicating a difference between the basic data and measurement data as time-series data corresponding to the sensor value acquired from the sensor is generated, and the differential data is transmitted to an external device through wireless communication.

Claims

1. A communication device that transmits a sensor value of a sensor, which is configured to measure a predetermined physical quantity when a measurement target machine operates, to an external device through wireless communication, the communication device comprising:

a sensor value acquisition part configured to acquire the sensor value;

a basic data generating part configured to generate basic data as time-series data with reference to the acquired sensor value;

a differential data generating part configured to generate differential data indicating a difference between the basic data and measurement data as time-series data corresponding to the sensor value acquired from the sensor; and

a communication part configured to transmit the differential data to the external device.

2. The communication device according to claim 1,

wherein the communication part transmits the differential data to the external device using a variable length data frame.

3. The communication device according to claim 1,

wherein the basic data is time-series data generated with reference to the sensor value measured when the machine normally performs a predetermined operation.

4. The communication device according to claim 3,

wherein the basic data generating part acquires time-series data of the sensor value of the sensor corresponding to a predetermined operation of the machine a plurality of times and generates the basic data based on a plurality of the time-series data.

5. The communication device according to claim 1,

wherein the basic data generating part generates the basic data for each of a plurality of types of operations of the machine.

6. The communication device according to claim 5, comprising:

an operation determination part configured to determine a type of an operation of the measurement target machine with reference to the measurement data,

wherein the differential data generating part generates the differential data using the basic data corresponding to a type of the operation determined by the operation determination part.

7. The communication device according to claim 1,

wherein the basic data generating part updates the basic data with reference to the sensor value used for generating the differential data.

8. The communication device according to claim 7,

wherein the communication part transmits the basic data updated with reference to the sensor value used for generating the differential data to the external device in a period during which the operation of the measurement target machine stops.

9. The communication device according to claim 7,

wherein the communication part divides the basic data updated with reference to the sensor value used for generating the differential data and transmits the divided data to the external device a plurality of times in a divided manner between transmissions of the differential data.

11. An external device comprising:

a reception part configured to receive the basic data and the differential data from the communication device according to claim 1; and

a reconstruction part configured to reconstruct the sensor value based on the basic data and the differential data.

12. The external device according to claim 11, further comprising

a transmission part configured to transmit the sensor value reconstructed by the reconstruction part to a controller configured to control an operation of the machine via a communication network.

13. A control method of an external device comprising:

a basic data reception step of receiving the basic data from the communication device according to claim 1; and

a reconstruction step of receiving the differential data and reconstructing the sensor value based on the basic data and the differential data.

14. A control system comprising the communication device according to claim 1 and an external device,

the external device comprises:

a reception part configured to receive the basic data and the differential data from the communication device; and

a reconstruction part configured to reconstruct the sensor value based on the basic data and the differential data.

15. The communication device according to claim 2,

wherein the basic data is time-series data generated with reference to the sensor value measured when the machine normally performs a predetermined operation.

16. The communication device according to claim 2,

wherein the basic data generating part generates the basic data for each of a plurality of types of operations of the machine.

17. The communication device according to claim 3,

wherein the basic data generating part generates the basic data for each of a plurality of types of operations of the machine.

18. The communication device according to claim 2,

wherein the basic data generating part updates the basic data with reference to the sensor value used for generating the differential data.

19. The communication device according to claim 3,

wherein the basic data generating part updates the basic data with reference to the sensor value used for generating the differential data.

20. The communication device according to claim 4,

wherein the basic data generating part updates the basic data with reference to the sensor value used for generating the differential data.

10. A control method of a communication device that transmits a sensor value of a sensor configured to measure a predetermined physical quantity when a measurement target machine operates to an external device through wireless communication, the control method comprising:

a learning phase in which the sensor value is acquired and basic data as time-series data is generated by learning and referring to the sensor value; and

an operation phase in which differential data indicating a difference between the basic data and measurement data as time-series data corresponding to the sensor value acquired when the measurement target machine operates from the sensor is generated, and the differential data is transmitted to the external device.