EP0299557A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Identification system for stock farms
Assignee: Nederlandsche Apparatenfabriek NEDAP NV
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Filing: 1988-06-30
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Granted: —
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Expires: 2008-06-30
Abstract
Abstract An identification system, in particular one suitable for stock farms comprising a transmitter/receiver for generating an electromagnetic interrogation field in a detection zone and for receiving an identification signal generated by a responder; and a plurality of coded responders capable of generating an identification signal in response to an electromagnetic interrogation field, each coded responder being, in operation, attached to a specific animal and being capable of generating an identification signal associated with that animal. According to the invention the coded responders have a relatively small area of operation and can be implanted in an animal. There is further provided for each animal a transponder attachable to such animal, which transponder is, in operation, disposed in the area of operation of the coded responder of the animal, and comprises an electrical circuit which, in response to the interrogation field generated by the transmitter/receiver is capable of generating itself a second interrogation field, which second interrogation field is capable of activating the implantable responder.
Inventors
- 👤 Johannes Harm Lukas Hogen Esch
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:32
CPC Classifications
A; A01; A01K; A01K11/00; A01K11/006; G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S13/758; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/086
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
169 words
An identification system, in particular one suitable for stock farms, comprising a transmitter/receiver for generating an electromagnetic interrogation field in a detection zone and for receiving an identification signal generated by a responder; and a plurality of coded responders capable of generating an identification signal in response to an electromagnetic interrogation field, each coded responder being, in operation, attached to a specific animal and being capable of generating an identification signal associated with that animal, characterized in that the coded responders take the form of responders with a relatively small area of operation, adapted to be implanted in an animal, and that further there is provided for each animal a transponder attachable to such animal, which transponder is, in operation, disposed in the area of operation of the coded responder of the animal, and comprises an electrical circuit which, in response to the interrogation field generated by the transmitter/receiver is capable of generating itself a second interrogation field, which second interrogation field is capable of activating the implantable responder.
Claim 2
Dependent Claim
169 words
An identification system, in particular one suitable for stock farms, comprising a transmitter/receiver for generating an electromagnetic interrogation field in a detection zone and for receiving an identification signal generated by a responder; and a plurality of coded responders capable of generating an identification signal in response to an electromagnetic interrogation field, each coded responder being, in operation, attached to a specific animal and being capable of generating an identification signal associated with that animal, characterized in that the coded responders take the form of responders with a relatively small area of operation, adapted to be implanted in an animal, and that further there is provided for each animal a transponder attachable to such animal, which transponder is, in operation, disposed in the area of operation of the coded responder of the animal, and comprises an electrical circuit which, in response to the interrogation field generated by the transmitter/receiver is capable of generating itself a second interrogation field, which second interrogation field is capable of activating the implantable responder.
Claim 3
Dependent Claim
22 words
An identification system as claimed in claim 1, characterized in that at least one transponder is provided with a visual identifying indication.
Claim 4
Dependent Claim
23 words
An identification system as claimed in claim 1 or 2, characterized in that at least one transponder takes the form of an earmark.
Claim 5
Dependent Claim
28 words
An identification system as claimed in claim 1 or 2, characterized in that at least one transponder is provided with a collar for an animal to be identified.
Claim 6
Dependent Claim
34 words
An identification system as claimed in any of the preceding claims, characterized in that the electrical circuit of the transponders is a passive circuit comprising at least one coil tuned to the interrogation field.
Claim 7
Dependent Claim
33 words
An identification system as claimed in any of claims 1-4, characterized in that the electrical circuit of the transponder comprises a tuned circuit with at least one coil mounted on a ferrite rod.
Claim 8
Dependent Claim
27 words
An identification system as claimed in any of claims 1-4, characterized in that the electrical circuit of at least one transponder comprises a battery-fed active amplifier circuit.
Claim 9
Dependent Claim
44 words
An identification system as claimed in claim 7, characterized by detection means provided in said at least one transponder, said detection means being activated by an interrogation field with a pre-determined frequency to effect an electric coupling of the battery with the amplifier circuit.
Claim 10
Dependent Claim
32 words
An identification system as claimed in claim 7 or 8, characterized in that said at least one transponder is arranged so that with an exhausted battery it operates as a passive responder.
Claim 11
Dependent Claim
35 words
An identification system as claimed in any of the preceding claims, characterized in that the coded responders are arranged so that the code of the coded responders is at least partially reprogrammable by wireless means.
Claim 12
Dependent Claim
38 words
An identification system as claimed in any of the preceding claims, characterized in that the implantable responders are mounted in a housing whose outer surface consists of a material capable of coalescing with the tissue of the animal.
Claim 13
Dependent Claim
38 words
An identification system as claimed in any of the preceding claims, characterized in that at least one transponder is provided with its own code circuit which under the influence of a suitable interrogation field generates a code signal.
Claim 14
Dependent Claim
132 words
An identification system, in particular one suitable for stock farms, comprising a transmitter/receiver for generating an electromagnetic interrogation field in a detection zone and for receiving an identification signal generated by a responder; and a plurality of coded responders capable of generating an identification signal in response to an electromagnetic interrogation field, each coded responder being, in operation, attached to a specific animal and being capable of generating an identification signal associated with that animal, characterized in that the coded responders are formed as miniaturized responders with a relatively small area of operation, which are implantable in an animal, and that furthermore an additional coded responder is provided for each animal for attachment to such animal, which additional responder is arranged to generate an identification signal in response to the interrogation field.
Claim 15
Dependent Claim
132 words
An identification system, in particular one suitable for stock farms, comprising a transmitter/receiver for generating an electromagnetic interrogation field in a detection zone and for receiving an identification signal generated by a responder; and a plurality of coded responders capable of generating an identification signal in response to an electromagnetic interrogation field, each coded responder being, in operation, attached to a specific animal and being capable of generating an identification signal associated with that animal, characterized in that the coded responders are formed as miniaturized responders with a relatively small area of operation, which are implantable in an animal, and that furthermore an additional coded responder is provided for each animal for attachment to such animal, which additional responder is arranged to generate an identification signal in response to the interrogation field.
Claim 16
Dependent Claim
76 words
An identification system as claimed in any of claims 7-13, characterized in that said at least one responder comprises a first LC circuit acting as an input circuit, and a second LC circuit acting as an output circuit, the input circuit being connected to the input of the amplifier, and the output circuit being connected to the output of the amplifier; and that the detection means comprise a threshold value detector connected to the input circuit.
Claim 17
Dependent Claim
34 words
An identification system as claimed in claim 14, characterized in that the connection between the battery and one of the supply terminals of the amplifier comprises a semiconductor switch element with a control electrode.
Claim 18
Dependent Claim
23 words
An identification system as claimed in claim 15, characterized in that the control electrode is connected through a rectifier to the input circuit.
Claim 19
Dependent Claim
27 words
An identification system as claimed in any of claims 14-16, characterized in that the input circuit and the output circuit have at least one coil in common.
Claim 20
Dependent Claim
36 words
An identification system as claimed in any of claims 14-17, characterized by the provision of a timer in the connection between the battery and the amplifier, which timer breaks the connection after a pre-determined time interval.
Claim 21
Dependent Claim
24 words
An identification system as claimed in claim 18, characterized in that the timer also functions as a threshold value detector and as a switch.
References Cited (Backward Citations)
NL7810245A
Cited
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