Ultrasonic transmitter and receiver systems and products using the same
First Claim
1. An ultrasound transducer, comprising at least one thin film having longitudinal, latitudinal, and z axes, wherein the at least one thin film is prestressed along the longitudinal axis by bending the at least one thin film around a given radius.
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Accused Products
Abstract
A transceiver preferably embedded within a wearable security watch, PDA, or other device which achieves a variety of wireless ultrasonic and/or radio-frequency based functions, including digital identification and proximity and sensation monitoring of assets, individuals, pets, and the like. The portable or wearable device realizes these functions by periodically polling and receiving information tags within the transmitting distance of the device. The invention can help reduce the likelihood of the theft, loss, or misplacement by detecting that a tag associated with or attached to an entity has left an individual'"'"'s proximity and sounding an alarm. The device can also assist individuals with sensory impairments, including persons who are deaf, diabetic, and the like, by detecting a tagged entity as it enters the space around an individual, or by detecting environmental stimuli, such as excessive heat in an individual'"'"'s proximity or vital sign changes, and sounding an alarm.
34 Citations
16 Claims
- 1. An ultrasound transducer, comprising at least one thin film having longitudinal, latitudinal, and z axes, wherein the at least one thin film is prestressed along the longitudinal axis by bending the at least one thin film around a given radius.
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7. An asset monitoring method comprising:
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registering at least one ultrasonic tag with at least one ultrasonic wireless controller; affixing the at least one ultrasonic tag to an asset; polling the at least one ultrasonic tag periodically by at least one controller;
monitoring ultrasonic tag replies to the periodic polling; and
,sounding an alarm if the at least one ultrasonic tag does not reply. - View Dependent Claims (8, 9, 10, 11)
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12. An asset monitoring method comprising:
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registering at least one ultrasonic tag with at least one ultrasonic wireless controller; affixing the at least one ultrasonic tag to an asset; polling the at least one ultrasonic tag periodically by at least one controller;
monitoring ultrasonic tag replies to the periodic polling; and
,sounding an alarm if the at least one ultrasonic tag replies after a period of not replying. - View Dependent Claims (13, 14, 15)
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16. An asset monitoring method comprising:
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registering at least one ultrasonic tag with at least one ultrasonic wireless controller;
affixing the at least one ultrasonic tag to an asset;polling the at least one ultrasonic tag periodically by at least one controller;
monitoring ultrasonic tag replies to the periodic polling;sounding an alarm if the at least one ultrasonic tag does not reply; and sounding an alarm if the at least one ultrasonic tag replies after a period of not replying.
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Specification