| 摘要 |
An impact energy sensor, 10, comprises a accelerometer, 12, an analog signal filter, 16, threshold circuitry, 20, and a data processor, 30. The analog signal filter, 16, is configured to filter signals from the accelerometer, 12. The threshold circuitry, 20, is configured to output a non-zero threshold bit only in response to filtered signals from the accelerometer, 12, which exceed a specified sensitivity threshold. The data processor, 30, is configured to assess impact energy by accumulating threshold bits from the threshold circuitry, and is further configured to transmit an alarm message only if N or more threshold bits are accumulated within a time window of width T, where N and T are predetermined application-specific values. |
