| 摘要 |
PURPOSE:To accurately record an impact measurement with a simple circuit by storing the maximum value only of peak hold vales. CONSTITUTION:The impact applied from 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 part 22. Smoothed signals are forwarded to a peak hold circuit 25, wherein only the peak value is held, and converted to a digital signal in an analog/digital converter part 26. In an arithmetic processing part 27, the digital signals are compared with data previously stored in a memory part 28 incorporated in the arithmetic processing part, then the data are rewritten and stored only in case the value is larger than the stored data. Thus, the maximum value only of the impact values is stored and displayed. With this arrangement, the impact measurement can be accurately recorded with the simple circuit. |
