Transponder detector
First Claim
1. A transponder detector apparatus comprising:
- antenna means for radiating a power signal to an identification transponder of an unidentified type and for reading a response signal characteristic from the transponder;
protocol select means for serially selecting each of a plurality of power signal and response signal characteristic parameters; and
protocol analyzer means for determining whether the response signal characteristic matches the selected parameter and producing an identification match signal.
3 Assignments
0 Petitions
Accused Products
Abstract
The transponder detector has an antenna for radiating a power signal to an identification transponder of an unidentified type and for reading a response signal characteristic from the transponder. A plurality of power signal and response signal characteristic parameters associated with transponder communication protocols are serially selected and implemented while an analysis of the response signal characteristic is carried out to determine whether the response signal characteristic matches the selected parameters and to produce an identification match signal. The result of the match signal is displayed as text identifying the transponder make and model number on an LCD display, in the case of a hand-held universal transponder detector. The device is particularly useful for confirming the presence and type of transponders embedded in the head of keys.
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Citations
18 Claims
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1. A transponder detector apparatus comprising:
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antenna means for radiating a power signal to an identification transponder of an unidentified type and for reading a response signal characteristic from the transponder; protocol select means for serially selecting each of a plurality of power signal and response signal characteristic parameters; and protocol analyzer means for determining whether the response signal characteristic matches the selected parameter and producing an identification match signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A transponder detector apparatus for identifying a type of transponder embedded in a key, said apparatus comprising:
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a housing; antenna means mounted in said housing for radiating a power signal to an identification transponder of an unidentified type concealed in a key held near said housing in wireless coupling with said antenna means and for reading a response signal characteristic from the transponder; protocol select means for serially selecting each of a plurality of power signal and response signal characteristic parameters; and protocol analyzer means for determining whether the response signal characteristic matches the selected parameter and for producing an identification match signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A transponder detector apparatus comprising:
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a housing including an aperture for receiving a shaft of a key, said aperture having an upper lip for engaging and retaining a head of said key; antenna means mounted in said housing for radiating a power signal to an identification transponder of an unidentified type concealed in said head of said key and for reading a response signal characteristic from the transponder, said antenna means comprising a circular coil substantially coaxial with said aperture; protocol select means for serially selecting each of a plurality of power signal and response signal characteristics parameters; protocol analyzer means; and display means for receiving the identification match signal and for indicating the type of transponder identified, if any. - View Dependent Claims (18)
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Specification