| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration measurement device of a simple and trouble free structure against the vibration and impact capable of measuring the vibration from weak vibration to a large vibration even though using a small number of components. SOLUTION: Between the piezoelectric vibration sensor 1 and the personal computer 10, the high gain circuit 8 for outputting the detected signal of the sensor amplifies with a certain amplification and the low gain circuit 9 for outputting the detected signal of the sensor attenuates with a certain attenuation value are parallelly provided and either output signal of both the circuit 8 or 9 which is within the dynamic range of the personal computer 10 is selected and outputted. In spite of the simple constitution such as piezoelectric vibration sensor 1 of high sensitivity is used capable of measuring from weak vibration to the large vibration or impact vibration by passing the signal from the sensor 1 through the particular signal process circuit, the simplification of the sensor mounting and troublesome treatment of wiring is prevented, and becomes trouble free because of using the piezoelectric vibration sensor with no moving parts. COPYRIGHT: (C)2006,JPO&NCIPI
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