ULTRASONIC SENSOR SYSTEM AND METHOD FOR SENSING DISTANCE
First Claim
1. An ultrasonic sensor system for sensing a distance between the system and a target, the sensor system comprising:
- an ultrasonic transceiver system operative to direct an acoustic output signal in a first direction toward a surface of the target and to generate a received signal based on an acoustic input signal received from the first direction;
a processing system operatively coupled with the transceiver to initiate the acoustic output signal and to generate a measurement output signal when the received signal is greater than a receiver threshold curve, the processing system comprising;
a memory storing a plurality of receiver threshold curves, anda curve selection component operative to select one of the receiver threshold curves based on a select input value.
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Accused Products
Abstract
Methods and ultrasonic sensor systems are presented for sensing distance in which an acoustic output signal is directed toward a target and acoustic input signals are received from the direction of the target, and the received signal is compared with a selected one of a plurality of different receiver threshold curves to identify the acoustic wave travel time to the target and back while differentiating between the target and acoustic waves reflected more than once and waves reflecting off obstructions between the sensor and the target, where the user selectable receiver threshold curves are tailored for different target and/or obstruction conditions.
30 Citations
23 Claims
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1. An ultrasonic sensor system for sensing a distance between the system and a target, the sensor system comprising:
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an ultrasonic transceiver system operative to direct an acoustic output signal in a first direction toward a surface of the target and to generate a received signal based on an acoustic input signal received from the first direction; a processing system operatively coupled with the transceiver to initiate the acoustic output signal and to generate a measurement output signal when the received signal is greater than a receiver threshold curve, the processing system comprising; a memory storing a plurality of receiver threshold curves, and a curve selection component operative to select one of the receiver threshold curves based on a select input value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for measuring distance in an ultrasonic sensor system, the method comprising:
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receiving a select input value identifying one of a plurality of receiver threshold curves; selecting an identified one of the curves according to the select input value; directing an acoustic output signal in a first direction toward a target; sensing an acoustic input signal received from the first direction to generate a received signal; comparing an amplitude of the received signal to a selected one of the receiver threshold curves; and generating a measurement output signal when the received signal is greater than the selected receiver threshold curve. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification