| 摘要 |
PURPOSE:To suppress the consumption of a battery in the manner of simplifying an electric circuit and to realize a miniaturization in dimension by providing a peak hold part, analog/digital converter, digital hold circuit and display part. CONSTITUTION:The impact applied from the outside is converted to a voltage in a piezoelectric type pickup for acceleration consisting of a detection part 21, and unrequired noise components are eliminated in a filter part 23 after being amplified in an amplifier 22. Smoothed signals are forwarded to a peak hold circuit 25, wherein the peak value is held, and converted to a digital signal in an analog/digital converter circuit 26, then forwarded to the digital hold circuit 27 to be held, and displayed on the display device 28 by means of pushing a display switch 12. With this arrangement, the impact measurement value can be surely recorded with the simple circuit. |
