Data medium for identifying objects, scanning device for interrogation of the data medium and process for controlling the data medium
First Claim
1. A data medium for identifying objects, comprising a data source, an energy source, and at least one RF signal reflector having a characteristic frequency, said data source periodically recurrently controlling said signal reflector with a period corresponding to a predetermined period of time, whereby the period of time is divided into a first interval and a second interval, and said data source further modulating the characteristic frequency of said signal reflector in the first interval for permitting an individual identification be interrogated by a scanning device, while the characteristic frequency of said signal reflector is not controlled in the second interval.
2 Assignments
0 Petitions
Accused Products
Abstract
A data medium for identifying objects, in particular gas cylinders, includes a data source and an energy source. Each data medium contains at least one RF signal reflector having a characteristic frequency which can be controlled by the data source. The waveform of the characteristic frequency containing the individual identification of the data medium is in coded form. A scanning device for interrogation of the data medium and a process for controlling the data medium are also provided.
-
Citations
15 Claims
- 1. A data medium for identifying objects, comprising a data source, an energy source, and at least one RF signal reflector having a characteristic frequency, said data source periodically recurrently controlling said signal reflector with a period corresponding to a predetermined period of time, whereby the period of time is divided into a first interval and a second interval, and said data source further modulating the characteristic frequency of said signal reflector in the first interval for permitting an individual identification be interrogated by a scanning device, while the characteristic frequency of said signal reflector is not controlled in the second interval.
-
8. In combination, a data medium and a scanning device for interrogation of the data medium,
the data medium comprising: - a data source, an energy source, and at least one RF signal reflector with a characteristic frequency, said data source periodically recurrently controlling said signal reflector with a period corresponding to a predetermined period of time, whereby the period of time is divided into a first interval and a second interval, and said data source further modulating the characteristic frequency of said signal reflector in the first interval for permitting an individual identification to be interrogated by a scanning device, while the characteristic frequency of said signal reflector is not controlled in the second interval; and
the scanning device comprising an RF transmitting device, an RF receiving device and an evaluation circuit.
- a data source, an energy source, and at least one RF signal reflector with a characteristic frequency, said data source periodically recurrently controlling said signal reflector with a period corresponding to a predetermined period of time, whereby the period of time is divided into a first interval and a second interval, and said data source further modulating the characteristic frequency of said signal reflector in the first interval for permitting an individual identification to be interrogated by a scanning device, while the characteristic frequency of said signal reflector is not controlled in the second interval; and
-
9. A process for controlling a data medium having a data source, an energy source, and at least one RF signal reflector antenna with a characteristic frequency to be controlled by the data source, which comprises:
-
periodically recurrently controlling the reflector antenna by the data source with a period corresponding to a predetermined period of time; subdividing the period of time into at least a first and a second interval; modulating the characteristic frequency of the reflector antenna by the data source in the first interval for permitting an individual identification to be interrogated by a scanning device; and providing no control of the characteristic frequency of the reflector antenna in the second interval. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
Specification