Patent ID: 9141903
Filing Date: 2015-09-22
Classification: G06K

Abstract:
1. An ultrasonic data tag operable to provide an indication of movement, the ultrasonic data tag comprising: a transducer operable to generate an electrical signal upon being subjected to movement, wherein the electrical signal is produced by sound vibrations of the transducer due to movement of the tag; a controller coupled to the transducer, the controller operable to detect the electrical signal from the transducer generated by the movement; a memory coupled to the controller, the memory including data to be read by the controller when the electrical signal is detected by the controller, and wherein the data in the memory includes tag identity data to be used in response to an ultrasonic trigger from the ultrasonic tag reader; and an emitter coupled to the controller, wherein upon the controller detecting the electrical signal, the emitter is powered up and receives modulated data from the controller for transmission to an ultrasonic tag reader using an ultrasonic carrier sound wave, and wherein the data transmitted by the emitter includes the tag identity data.