Material testing machine and control method of material testing machine

摘要

PROBLEM TO BE SOLVED: To perform a material test with high accuracy without depending on the resolution of an extensometer 90. SOLUTION: A material testing machine 1 executes a load mechanism 12 for applying a test force to a test piece TP, an extensometer 90 for measuring an elongation amount of the test piece TP, and a filtering process on the measured values of the extensometer 90. A filter processing unit 541 and a feedback control unit 543 that feedback-controls the load mechanism 12 so as to reduce the deviation between the processed value processed by the filter processing unit 541 and the target value of the elongation amount of the test piece TP are provided. , The filter processing unit 541 executes a filter process based on the time width obtained by dividing the resolution of the extensometer 90 by the rate indicating the amount of change in the elongation amount of the test piece TP per unit time on the measured value of the extensometer 90. [Selection diagram] Fig. 1