Tool State Detection Method of Machine Tool and System Thereof

A tool state detection system applicable to a tool machine, for detecting a state of a tool in a working environment where the tool performs a process, the tool state detection system including:

• a sensor mounted on the tool machine, for sensing influence of the tool on the working environment when the tool performs the process, so as to generate sensing result of time domain information, the sensing result of time domain information including good-product sensing result of time domain information, wherein the good-product sensing result of time domain information is generated by the sensor sensing influence of the tool on the working environment when the tool is a good product and performs the process;
• a good-product feature space model building module for performing transformation between time domain and frequency domain on the good-product sensing result of time domain information to obtain good-product sensing result of frequency domain information, and for collecting representative main good-product features in the good-product sensing result of frequency domain information to form a good-product feature space model in a second frequency domain space;
• and
• a state analysis module for instantaneously performing transformation between time domain and frequency domain on the sensing result of time domain information when the tool performs the process so as to obtain first sensing result of frequency domain information in a first frequency domain space, and for transforming the first sensing result of frequency domain information by the good-product feature space model into second sensing result of frequency domain information in the second frequency domain space, and for transforming the second sensing result of frequency domain information by the good-product feature space model into third sensing result of frequency domain information in the first frequency domain space, wherein the first sensing result of frequency domain information is compared with the third sensing result of frequency domain information for difference, so as to generate a tool state index for use in instantaneously analyzing the state of the tool.

A tool state detection method applicable to a tool machine, for detecting a state of a tool of a machine spindle in a working environment where the tool performs a process, the tool state detection method including the steps of:

• sensing influence of the tool on the machine spindle or working environment when the tool is performing the process, so as to generate sensing result of time domain information, the sensing result of time domain information including good-product sensing result of time domain information, wherein the good-product sensing result of time domain information is generated by a sensor sensing influence of the tool on the machine spindle or working environment when the tool is a good product and is performing the process;
• performing transformation between time domain and frequency domain on the good-product sensing result of time domain information to obtain good-product sensing result of frequency domain information, and collecting representative main good-product features in the good-product sensing result of frequency domain information to form a good-product feature space model in a second frequency domain space;
• and
• instantaneously performing transformation between time domain and frequency domain on the sensing result of time domain information when the tool is performing the process, so as to obtain first sensing result of frequency domain information in a first frequency domain space, and transforming the first sensing result of frequency domain information by the good-product feature space model into second sensing result of frequency domain information in the second frequency domain space, and then transforming the second sensing result of frequency domain information by the good-product feature space model into third sensing result of frequency domain information in the first frequency domain space, and then comparing the first sensing result of frequency domain information and the third sensing result of frequency domain information for difference so as to generate a tool state index to instantaneously analyze the state of the tool.