Device for detecting a percussion event, and associated mobile system
First Claim
1. A device for detecting percussion events comprising:
- at least one axial accelerometer sensor,at least one axial magnetometer sensor insensitive to translational vibrations,low cut-off filtering means provided with at least one input receiving measurements transmitted by the at least one axial accelerometer sensor and the at least one magnetometer sensor, andanalysis means for analyzing the accelerometer and magnetometer measurements filtered by said low cut-off filtering means, the analysis means comprising comparison means for comparing data from the filtered accelerometer measurements with at least one threshold, thereby determining a first outcome relating to the accelerometer measurements, and for comparing data from the filtered magnetometer measurements with at least one threshold, thereby determining a second outcome relating to the magnetometer measurements; and
the analysis means further configured to detect a percussion event based on the first outcome and the second outcome so that a rotational acceleration not filtered by said low cut-off filtering means is not detected as a percussion event.
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Accused Products
Abstract
The device for detecting percussion events (DISP) comprises at least one axial accelerometer sensor (ACC1, ACC2, ACC3), characterized in that it also comprises at least one additional axial sensor insensitive to the translational vibrations (MAGN1, MAGN2), for measuring an information item representative of the orientation of the device (DISP) relative to a vector field of known direction within a fixed coordinate system not linked to the device (DISP), and low cut-off filtering means (FILTCB) provided with at least one input receiving measurements transmitted by the axial sensor or sensors (ACC1, ACC2, ACC3, MAGN1, MAGN2), means (AN) of analyzing the measurements filtered by said low cut-off filtering means (FILTCB), comprising comparison means (COMP) for comparing data from the analysis means (AN) with one or two thresholds (SP, SN).
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Citations
16 Claims
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1. A device for detecting percussion events comprising:
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at least one axial accelerometer sensor, at least one axial magnetometer sensor insensitive to translational vibrations, low cut-off filtering means provided with at least one input receiving measurements transmitted by the at least one axial accelerometer sensor and the at least one magnetometer sensor, and analysis means for analyzing the accelerometer and magnetometer measurements filtered by said low cut-off filtering means, the analysis means comprising comparison means for comparing data from the filtered accelerometer measurements with at least one threshold, thereby determining a first outcome relating to the accelerometer measurements, and for comparing data from the filtered magnetometer measurements with at least one threshold, thereby determining a second outcome relating to the magnetometer measurements; and
the analysis means further configured to detect a percussion event based on the first outcome and the second outcome so that a rotational acceleration not filtered by said low cut-off filtering means is not detected as a percussion event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification