HIGH IMPACT ENERGY SENSOR
First Claim
Patent Images
1. An impact energy sensor comprising:
- An accelerometer;
an analog signal filter configured to filter signals from the accelerometer;
threshold circuitry configured to output a non-zero threshold bit only in response to filtered signals from the accelerometer which exceed a specified sensitivity threshold; and
a data processor configured to assess impact energy by accumulating threshold bits from the threshold circuitry, and 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 application-specific values.
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Abstract
An impact energy sensor comprises a accelerometer, an analog signal filter, threshold circuitry, and a data processor. The analog signal filter is configured to filter signals from the accelerometer. The threshold circuitry is configured to output a non-zero threshold bit only in response to filtered signals from the accelerometer which exceed a specified sensitivity threshold. The data processor 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.
8 Citations
20 Claims
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1. An impact energy sensor comprising:
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An accelerometer; an analog signal filter configured to filter signals from the accelerometer; threshold circuitry configured to output a non-zero threshold bit only in response to filtered signals from the accelerometer which exceed a specified sensitivity threshold; and a data processor configured to assess impact energy by accumulating threshold bits from the threshold circuitry, and 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 application-specific values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting high energy shock events with an impact energy sensor, the method comprising:
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monitoring acceleration along three orthogonal axes using a triaxial accelerometer; comparing outputs of the triaxial accelerometer to accelerometer sensitivity references; generating threshold bits which are non-zero only if the outputs of the triaxial accelerometer exceed the accelerometer sensitivity references; accumulating threshold bits over a time window of width T; and transmitting an alarm notification if N or more non-zero threshold bits are accumulated within the time window. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification