| 摘要 |
PROBLEM TO BE SOLVED: To provide an impact sensor capable of surely detecting and preventing an illegal act with no omission even when based on any illegal operation by surely detecting an acceleration value of a shake caused by shaking a base and an acceleration value of a shake caused by striking the base with one impact sensor. SOLUTION: Mechanical impulsive vibration is converted into an electric signal by a pickup 3. When an output signal from the pickup 3 is low impact frequency by shaking, the output signal is allowed to pass through without being damped by high-pass filters 12, 14 and is amplified by low-pass amplifying circuits 13, 15 while suppressing the degree of amplification, and an amplification signal is compared by a wind comparator 16 to detect impact by detecting a low acceleration value for low impact frequency and detecting a high acceleration value for high impact frequency. COPYRIGHT: (C)2009,JPO&INPIT
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