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US 10,241,193 B2Granted
Arrangement for, and method of, accurately locating products in a noisy venue
AssigneeSymbol Technologies, Inc.
InventorThomas E. Wulff
Life of this patent
Estimating the term…
Abstract
Ultrasonic transmitters periodically transmit ultrasonic ranging signals, and an ultrasonic receiver receives the ultrasonic ranging signals on a mobile device in order to locate the mobile device in a venue. A controller determines a noise level in the venue, and varies a sound level of the periodically ranging signals based on the determined noise level, thereby optimizing the position of the mobile device.
Claims19
An arrangement for locating a mobile device in a venue, the arrangement comprising:
- a plurality of ultrasonic transmitters spaced apart from one another at fixed positions in the venue and operable to transmit ultrasonic ranging signals;
- a receiver disposed in the mobile device wherein the receiver is operable to receive acoustic noise signals indicative of noise in the venue and to receive the ultrasonic ranging signals;
- and
- a controller operative for controlling the transmitters to transmit the ultrasonic ranging signals at a sound level, and for determining a location of the mobile device based on received ultrasonic ranging signals;
- the controller being further operative for determining a noise level of the acoustic noise signals, and for varying the sound level of the ultrasonic ranging signals based on the determined noise level of the acoustic noise signals.
2 more elements
A method of locating products in a venue, the method comprising:
- controlling ultrasonic transmitters spaced apart from one another at fixed positions in the venue to transmit a plurality of ultrasonic ranging signals at a sound level;
- controlling a receiver in a mobile device to receive the ultrasonic ranging signals;
- determining a location of the mobile device and of the products in the venue based on the received ultrasonic ranging signals;
- controlling the receiver to receive acoustic noise signals indicative of noise in the venue;
- determining a noise level of the acoustic noise signals;
- and
- varying the sound level of the ultrasonic ranging signals based on the determined noise level of the acoustic noise signals.
4 more elements
A sensing unit comprising:
- one or more ultrasonic transmitters operable to transmit ultrasonic ranging signals at a sound level;
- a communication interface operative for receiving a flight time difference between a transmit time of a ranging signal and a receive time at which the ranging signal was received at a microphone of a mobile device;
- the communication interface further operative for receiving a noise level of acoustic noise signals received at the microphone of the mobile device;
- and
- a controller operative for varying the sound level of the ultrasonic ranging signals based on a determined noise level of the acoustic noise signals and for determining a location of the mobile device based on the received flight time difference.
2 more elements
Dependencies are inferred from the claim text.