Methods and device for ultrasonic range sensing
First Claim
1. A system for sensing proximity of an object, the system comprising:
- a signal generator;
a plurality of signals generated by the signal generator;
a transducer in communication with the signal generator to receive the plurality of signals from the signal generator, wherein the transducer is capable of transforming the plurality of signals from the signal generator into a plurality of ultrasonic waves;
the plurality of ultrasonic waves includes a first ultrasonic wave and a second ultrasonic wave, wherein the first ultrasonic wave and the second ultrasonic wave are formed out of phase;
the plurality of ultrasonic waves are at least partially directed toward and reflected by the object;
the transducer receiving the plurality of ultrasonic waves reflected by the object;
an analog to digital converter in communication with the transducer, wherein the received plurality of ultrasonic waves reflected by the object are communicated to the analog to digital converter by the transducer; and
a detector that measures a deviation between a detector ring down pattern and a base ring down pattern.
1 Assignment
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Accused Products
Abstract
A system and method for sensing proximity of an object includes a signal generator, which generates a plurality of signals. A transducer is in communication with the signal generator to receive the plurality of signals from the signal generator. The transducer is capable of transforming a plurality of signals from the signal generator into a plurality of ultrasonic waves. The plurality of ultrasonic waves includes a first ultrasonic wave and a second ultrasonic wave, wherein the first ultrasonic wave and the second ultrasonic wave are formed out of phase. The plurality of ultrasonic waves are directed toward and reflected by the object. The transducer receives the plurality of ultrasonic waves reflected by the object, which become a plurality of received ultrasonic waves. An analog to digital converter is in communication with the transducer. The received plurality of ultrasonic waves reflected by the object is communicated to the analog to digital converter by the transducer.
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Citations
20 Claims
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1. A system for sensing proximity of an object, the system comprising:
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a signal generator; a plurality of signals generated by the signal generator; a transducer in communication with the signal generator to receive the plurality of signals from the signal generator, wherein the transducer is capable of transforming the plurality of signals from the signal generator into a plurality of ultrasonic waves; the plurality of ultrasonic waves includes a first ultrasonic wave and a second ultrasonic wave, wherein the first ultrasonic wave and the second ultrasonic wave are formed out of phase; the plurality of ultrasonic waves are at least partially directed toward and reflected by the object; the transducer receiving the plurality of ultrasonic waves reflected by the object; an analog to digital converter in communication with the transducer, wherein the received plurality of ultrasonic waves reflected by the object are communicated to the analog to digital converter by the transducer; and a detector that measures a deviation between a detector ring down pattern and a base ring down pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sensing proximity of an object, said method comprising the steps of:
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transmitting a first ultrasonic wave from a transducer; transmitting at least a second ultrasonic wave from the transducer, wherein the second ultrasonic wave is not in phase with the first ultrasonic wave; receiving the first ultrasonic wave with the transducer after the first ultrasonic wave reflects off of the object; receiving the second ultrasonic wave with the transducer after the second ultrasonic wave reflects off of the object and after the first ultrasonic wave is received; outputting the received first ultrasonic wave and second ultrasonic wave from the transducer to an analog to digital converter; detecting a deviation between a detector ring down pattern and a base ring down pattern whereby a change in signal characteristics during receipt of the first ultrasonic wave is indicative of an initial receipt of the second ultrasonic wave; and calculating range of the object based on time of receipt of the first ultrasonic wave and the second ultrasonic wave. - View Dependent Claims (13, 14, 15, 16)
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17. A system for sensing proximity of objects, the system comprising:
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means for transmitting a first ultrasonic wave; means for transmitting at least a second ultrasonic wave, wherein the second ultrasonic wave is not in phase with the first ultrasonic wave; means for receiving the first ultrasonic wave after the first ultrasonic wave reflects off of the object; means for receiving the second ultrasonic wave after the second ultrasonic wave reflects off of the object and after the first ultrasonic wave is received; means for measuring a deviation between a detector ring down pattern and a base ring down pattern; and means for calculating range of the object based on time of receipt of the first ultrasonic wave and the second ultrasonic wave. - View Dependent Claims (18, 19, 20)
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Specification