Tool/workpiece`s condition or breakage monitoring device for machine process, has evaluation unit determining difference between running times of sound waves from noise source to sensors to receive information about position of noise source

摘要

The device has an impact sound sensor (8) coupled with a tool (2) or a workpiece (1) to detect sound waves (14) dispersed in the tool or the workpiece, and an evaluation unit (12) connected with the impact sound sensor and another sensor (9). The evaluation unit determines a difference between the running times of the sound waves from a noise source to the sensors to receive additional information about the position of the noise source, where an output signal is generated based on the determined difference between the running times.