Wide-angle, static and positional anticipatory object detection system
First Claim
1. A wide angle, static, positional anticipatory object detection system comprising:
- a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object;
a detection device for detecting a plurality of Doppler shifted harmonic components from said reflected modulated carrier signal;
a range determining device responsive to the amplitudes of at least two of said harmonic components being equal for determining the instantaneous range of said object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of said harmonic components;
a Doppler period measurement device responsive to at least one of said harmonic components for measuring the Doppler periods of that harmonic component; and
a collision decision device, responsive to said range determining device and said Doppler period measurement device, for indicating that a collision with said object is imminent and the offset of the collision from the detection device before contact is made.
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Accused Products
Abstract
A wide angle, static, positional anticipatory object detection system includes a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object, a detection device for detecting a plurality of Doppler shifted harmonic components from the reflected modulated carrier signal, a range determining device responsive to the amplitudes of at least two of the harmonic components being equal for determining the instantaneous range of the object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of the harmonic components. The system also includes a Doppler period measurement device responsive to at least one of the harmonic components for measuring the Doppler periods of that harmonic component and a collision decision device, responsive to the range determining device and the Doppler period measurement device, for indicating that a collision with the object is imminent and the offset of the collision from the detection device before contact is made.
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Citations
18 Claims
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1. A wide angle, static, positional anticipatory object detection system comprising:
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a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object;
a detection device for detecting a plurality of Doppler shifted harmonic components from said reflected modulated carrier signal;
a range determining device responsive to the amplitudes of at least two of said harmonic components being equal for determining the instantaneous range of said object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of said harmonic components;
a Doppler period measurement device responsive to at least one of said harmonic components for measuring the Doppler periods of that harmonic component; and
a collision decision device, responsive to said range determining device and said Doppler period measurement device, for indicating that a collision with said object is imminent and the offset of the collision from the detection device before contact is made. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An anticipatory object detection system comprising:
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a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object;
a detection device for detecting a plurality of Doppler shifted harmonic components from said reflected modulated carrier signal;
a range determining device responsive to the amplitudes of at least two of said harmonic components being equal for determining the instantaneous range of said object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of said harmonic components;
a Doppler period measurement device responsive to the frequency of at least one of said harmonic components for measuring a change in consecutive Doppler periods of said harmonic components during said predetermined distance; and
a microprocessor responsive to said range determining device and said Doppler period measurement device for determining if a collision with said object is imminent and, if so, the position of said collision relative to said detection device.
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15. A method for determining the probability and offset of a collision, the method comprising the steps of:
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transmitting a modulated carrier signal;
receiving the modulated carrier signal after it is reflected from an object;
detecting a plurality of Doppler shifted harmonic components from the reflected modulated carrier signal;
determining the instantaneous range of the object based on the amplitudes of at least two of said harmonic components being equal;
measuring Doppler periods of one of said harmonic components;
determining differences between the Doppler periods of said harmonic component; and
indicating that a collision with the object is imminent and the offset of the collision based on said differences in the Doppler periods. - View Dependent Claims (16, 17, 18)
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Specification