Contact sensitive device
First Claim
Patent Images
1. A contact sensitive device comprising:
- a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member, wherein each of the sensors determines a measured bending wave signal; and
a processor responsive to the measured bending wave signals to calculate a location of a contact on the member;
the processor calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated from which the location of the contact is determined.
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Abstract
A contact sensitive device includes a member capable of supporting bending waves and a plurality of sensors mounted on the member for measuring bending wave vibration in the member. The sensors measure the bending wave signals and by calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated, the location of the contact can be determined.
104 Citations
39 Claims
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1. A contact sensitive device comprising:
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a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member, wherein each of the sensors determines a measured bending wave signal; and
a processor responsive to the measured bending wave signals to calculate a location of a contact on the member;
the processor calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated from which the location of the contact is determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of determining information relating to a contact on a contact sensitive device comprising:
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providing a member capable of supporting bending waves and a plurality of sensors mounted on the member for measuring bending wave vibration in the member;
applying a contact to the member at a location, using each of the sensors to determine a measured bending wave signal; and
calculating the location of a contact from the measured bending wave signals by calculating a phase angle for each measured bending wave signal, calculating a phase difference between the phase angles of at least two pairs of sensors and determining the location of the contact from the at least two calculated phase differences. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A contact sensitive device comprising:
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a member capable of supporting bending waves;
a plurality of sensors mounted on the member for measuring bending wave vibration in the member; and
means for calculating the location of a contact from the measured bending wave signal by calculating a phase angle for each measured bending wave signal, calculating a phase difference between the phase angles of at least two pairs of sensors and determining the location of the contact from the at least two calculated phase differences.
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Specification