Tag and receiver systems
First Claim
1. A pet tag, the tag comprising:
- a housing configured for attaching the tag to a pet;
an internal power supply contained within said housing; and
a spread spectrum transmitter contained within said housing;
wherein said spread spectrum transmitter has a transmit power substantially equal to or less than 1000 μ
W.
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Accused Products
Abstract
A pet tag (10) for locating lost pets, the tag comprising a housing containing an internal power supply and a micropower rf transmitter (26) to transmit a spread spectrum signal such as a Gold or Kasami coded signal; and an optional acoustic command receiver (20) to receive an acoustic command; and wherein the coded signal is transmitted in response to reception of an acoustic command.
A corresponding detector (1200) for locating a tagged pet comprises: a direct sequence spread spectrum (DSSS) receiver (1300) for receiving from the tag a spread spectrum signal based on a Gold or Kasami code; a first aerial (1206) coupled to the receiver; input means (1210) for user selection of a said Gold or Kasami code; and indicating means (1228) for indicating when a tag with the selected code is detected.
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Citations
77 Claims
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1. A pet tag, the tag comprising:
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a housing configured for attaching the tag to a pet;
an internal power supply contained within said housing; and
a spread spectrum transmitter contained within said housing;
wherein said spread spectrum transmitter has a transmit power substantially equal to or less than 1000 μ
W. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tag for locating an object, the tag comprising:
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an rf transmitter to transmit a coded signal; and
an acoustic command receiver to receive an acoustic command; and
wherein the coded signal is transmitted in response to reception of an acoustic command. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63)
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23. A tag for locating an object, the tag comprising:
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a command receiver to receive a command; and
a spread spectrum rf transmitter, the spread spectrum transmitter having a spreading code;
wherein the transmitter transmits a spread spectrum signal responsive to a received command; and
wherein the transmitted signal conveys the spreading code unmodulated by baseband data.
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38. A detector for locating an object having a tag, the detector comprising:
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a direct sequence spread spectrum (DSSS) receiver for receiving from the tag a spread spectrum signal based on a Gold or Kasami code;
a first aerial coupled to the receiver;
input means for user selection of a said Gold or Kasami code; and
indicating means for indicating when a tag with the selected code is detected.
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48. A tag for use with a tag detector radar, the tag comprising:
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a pseudonoise (PN) code generator for generating a spreading code for a spread spectrum system; and
a modulator and antenna combination for providing a modulated radar return from the tag;
wherein the PN code generator is coupled to the modulator for modulating the radar return with the spreading code.
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59. A radar detector for a tag providing a radar return modulated with a spread spectrum code, the detector comprising a radar front end coupled to a spread spectrum receiver.
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64. A system for alerting a user having a tag receiver to separation from a tagged object, the system comprising a tag and a tag receiver, the tag comprising:
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an activation/deactivation control device; and
a transmitter coupled to the control device;
the tag being configured to;
upon activation, start transmitting; and
upon deactivation, transmit a deactivation signal and cease transmitting;
the tag receiver comprising;
a receiver for receiving transmissions from the tag;
a detector, coupled to the receiver, for detecting a reduction in the strength of signal received from the tag and for detecting reception of the deactivation signal from the tag; and
an alarm device, coupled to the detector, for providing a user alert when a reduction in signal strength is detected without a deactivation signal. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73, 74)
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75. A system for alerting a user having a tag receiver to separation from a tagged object, the system comprising a tag and a tag receiver, the tag comprising:
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a spread spectrum transmitter; and
a switch coupled to the spread spectrum transmitter for switching the spread spectrum transmitter on and off;
the tag receiver comprising;
a receiver for receiving transmissions from the tag;
a detector, coupled to the receiver, for detecting a reduction in the strength of signal received from the tag; and
an alarm device, coupled to the detector, for providing a user alert when a reduction in signal strength is detected. - View Dependent Claims (76, 77)
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Specification