Anomaly detection system, anomaly detection device, anomaly detection method, and computer program

An anomaly detection device configured to detect an anomaly in a tool of a machine tool, the anomaly detection device comprising:

• an acquisition unit configured to acquire measurement data in time series outputted from a sensor provided to the tool, the sensor being configured to measure a physical quantity, of the tool, that varies while the machine tool is machining a machining target object by means of the tool;
• a synchronization unit configured to achieve synchronization between target data being the measurement data in time series acquired by the acquisition unit, and reference data being a measurement result in time series of the physical quantity when the tool is in a normal state;
• a distance calculation unit configured to calculate a distance between the reference data and the target data between which synchronization has been achieved by the synchronization unit;
• and
• an anomaly detection unit configured to detect an anomaly in the tool by comparing the distance calculated by the distance calculation unit with a threshold.

An anomaly detection method executed by an anomaly detection device configured to detect an anomaly in a tool of a machine tool, the anomaly detection method comprising:

• a step of acquiring measurement data in time series outputted from a sensor provided to the tool, the sensor being configured to measure a physical quantity, of the tool, that varies while the machine tool is machining a machining target object by means of the tool;
• a step of achieving synchronization between target data being the acquired measurement data in time series, and reference data being a measurement result in time series of the physical quantity when the tool is in a normal state;
• a step of calculating a distance between the reference data and the target data between which synchronization has been achieved;
• and
• a step of detecting an anomaly in the tool by comparing the calculated distance with a threshold.

A computer-readable non-transitory storage medium having stored therein a computer program for detecting an anomaly in a tool of a machine tool, the computer program causing a computer to execute:

• a step of acquiring measurement data in time series outputted from a sensor provided to the tool, the sensor being configured to measure a physical quantity, of the tool, that varies while the machine tool is machining a machining target object by means of the tool;
• a step of achieving synchronization between target data being the acquired measurement data in time series, and reference data being a measurement result in time series of the physical quantity when the tool is in a normal state;
• a step of calculating a distance between the reference data and the target data between which synchronization has been achieved;
• and
• a step of detecting an anomaly in the tool by comparing the calculated distance with a threshold.