| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a material testing machine which is capable of stably generating a trigger signal of imaging end for a high-speed video camera. <P>SOLUTION: A control unit 23 comprises a load measuring section 40 and a data processing section 45. The load measuring section 40 includes an amplifier 41, an A/D converter 42 and a comparative arithmetic part 43. Test power data from the load cell 14 are fetched into the load measuring section 40 and further amplified in the amplifier 41 inside the load measuring section 40. The amplified test power data are converted into a digital signal by the A/D converter 42 and transmitted to the data processing section 45 and the comparative arithmetic part 43. In the comparative arithmetic part 43, a value of 1/2 of a maximum value of the measured load is calculated by a one-bit shift processing part 51, and while defining that value as a reference value, arithmetic processing is executed for generating a trigger signal of imaging end to be transmitted to a high-speed video camera 15. <P>COPYRIGHT: (C)2013,JPO&INPIT |
