READER/WRITER AND ARTICLE SORTING SYSTEM
First Claim
1. A system which reads and writes information from and onto a non-contact information recording medium using an electric wave, the system comprising:
- a reader/writer comprising;
an antenna configured to transmit an electric wave onto said non-contact information recording medium;
a demodulator configured to demodulate a reflected wave obtained by said non-contact information recording medium modulating a part of the electric wave; and
a calculator configured to obtain a delay time of said reflected wave;
a measuring unit configured to measure a difference in delay times calculated by the calculator, thereby obtaining a change in a distance between the antenna mediating transmission/reception of the electric wave and said non-contact information recording medium.
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Accused Products
Abstract
A system that reads and writes information from and onto a non-contact information recording medium using an electric wave includes a reader/writer and a measuring unit. The reader/writer includes an antenna configured to transmit an electric wave onto the non-contact information recording medium, a demodulator configured to demodulate a reflected wave obtained by the non-contact information recording medium modulating a part of the electric wave, and a calculator configured to obtain a delay time of the reflected wave. The measuring unit measures a difference in delay times calculated by the calculator, and obtains a change in a distance between the antenna mediating transmission/reception of the electric wave and the non-contact information recording medium.
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Citations
20 Claims
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1. A system which reads and writes information from and onto a non-contact information recording medium using an electric wave, the system comprising:
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a reader/writer comprising; an antenna configured to transmit an electric wave onto said non-contact information recording medium; a demodulator configured to demodulate a reflected wave obtained by said non-contact information recording medium modulating a part of the electric wave; and a calculator configured to obtain a delay time of said reflected wave; a measuring unit configured to measure a difference in delay times calculated by the calculator, thereby obtaining a change in a distance between the antenna mediating transmission/reception of the electric wave and said non-contact information recording medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for reading and writing information from and onto a non-contact information recording medium using an electric wave, the method comprising:
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transmitting an electric wave onto said non-contact information recording medium; demodulating a reflected wave obtained by said non-contact information recording medium modulating a part of the electric wave; obtaining a delay time of said reflected wave; and measuring a difference in the calculated delay times, thereby obtaining a change in a distance between an antenna mediating transmission/reception of the electric wave and said non-contact information recording medium.
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Specification