| 摘要 |
PURPOSE:To measure with high accuracy and high efficiency by providing an ultrasonic transmitter and an ultrasonic receiver respectively on the contact part of two adjacent objects. CONSTITUTION:A piezoelectric exciter 1 is mounted on a metal part 2 at the end of a block drum 012 for a printing machine. The ultrasonic wave 4 is generated by this piezoelectric exciter 1 furnished with an input from a signal generator 3. The ultrasonic wave 4 generated from the piezoelectric exciter 1 is received by a piezoelectric sensor 5 which is mounted on the metal part 6 at the end of a press drum 013. An output from this piezoelectric sensor 5 is supplied to an indicator 9 through an amplifier 7 and a filter 8. A contact load between the press drums 012 and 013 can be estimated by an indication on the indicator 9. |
