Acoustic condition sensor employing a plurality of mutually non-orthogonal waves
First Claim
1. A system for determining a position, comprising:
- a transducer for transmitting at least one wave;
a static structure for dispersing the at least one wave to provide wave energy over a region in which position is to be sensed;
a transducer for receiving the at least one wave from the region, representing wave energy which has interacted with an object within the region, while retaining wave path information; and
a processor for analyzing a perturbation of the interacted wave energy by the object and wave path information to determine a position of the object,wherein the processor adapts the transmitted at least one wave based on a characteristic of the region determined based on the received interacted signal.
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Accused Products
Abstract
A touch sensor comprising an acoustic wave transmissive medium having a surface; a plurality of acoustic wave path forming systems, each generating a set of incrementally varying paths through said transmissive medium; and a receiver, receiving signals representing said sets of waves, a portion of each set overlapping temporally or physically by propagating in said transmissive medium along axes which are not orthogonal. The waves may also be of differing wave modes. The receiver system may include a phase, waveform or amplitude sensitive system. Reflective arrays are associated with said medium situated along a path, said path not being a linear segment parallel to a coordinate axis of a substrate in a Cartesian space, a segment parallel to an axial axis or perpendicular to a radial axis of a substrate in a cylindrical space, nor parallel and adjacent to a side of a rectangular region of a small solid angle section of a sphere; situated along a path substantially not corresponding to a desired coordinate axis of a touch position output signal; situated along a path substantially non-parallel to an edge of said medium; has a spacing of elements in said array which differs, over at least one portion thereof, from an integral multiple of a wavelength of an incident acoustic wave; has elements in said array which are non-parallel; has an angle of acceptance of acoustic waves which varies over regions of said array; and/or coherently scatter at least two distinguishable acoustic waves which are received by said receiving system.
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Citations
20 Claims
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1. A system for determining a position, comprising:
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a transducer for transmitting at least one wave; a static structure for dispersing the at least one wave to provide wave energy over a region in which position is to be sensed; a transducer for receiving the at least one wave from the region, representing wave energy which has interacted with an object within the region, while retaining wave path information; and a processor for analyzing a perturbation of the interacted wave energy by the object and wave path information to determine a position of the object, wherein the processor adapts the transmitted at least one wave based on a characteristic of the region determined based on the received interacted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer readable storage medium, having stored thereon instructions for causing a general purpose processor to perform the steps of:
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transmitting at least one wave; receiving the at least one wave, representing physically dispersed wave energy which has interacted with an object within a region, while retaining wave path information; analyzing a perturbation of the interacted wave energy by the object and wave path information to determine a position of the object, adapting the at least one transmitted wave to a characteristic of the region determined based on the received interacted signal. - View Dependent Claims (11)
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12. A method for determining a position, comprising:
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transmitting at least one wave; dispersing the at least one wave with a static structure to provide wave energy over a region in which position is to be sensed; interacting the wave energy with an object within the region; receiving the at least one wave from the region, representing the interacted wave energy, while retaining wave path information; and analyzing a perturbation of the interacted wave energy by the object and wave path information to determine a position of the object, wherein said transmitting is adaptive to a characteristic of the region determined based on the received interacted signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification