RADIO-FREQUENCY TAG COMMUNICATION DEVICE
First Claim
1. A radio-frequency tag communication device, having an antenna operative to switch polarization planes used a communication, and executing the communication of information with a radio-frequency tag and executing a control to switch the polarization planes of the antenna during the communication, the radio-frequency tag communication device comprising:
- a polarization-plane switching control portion operative to switch the polarization planes of the antenna within one-third of a time period preliminarily set in which a targeted radio-frequency tag stays in a communication field; and
a communication control portion controlling at least one of a frequency, a modulating system, a response wait time and a commands order relevant to the communication such that the communication in association with a command group to execute a series of communications with plural radio-frequency tags selected in response to a predetermined selection command is completed once within a time interval in which the polarization-plane switching control portion switches the polarization planes of the antenna.
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Accused Products
Abstract
A radio-frequency tag communication device configured to appropriately minimize a failure in reading out of a targeted radio-frequency tag is provided. The radio-frequency tag communication device comprises a polarization-plane switching control portion 78 operative to switch polarization planes of an antenna within one-third of a time interval TStay preliminarily set in which the targeted radio-frequency tag 14 stays in a communication field, and a communication control portion 76 controlling a parameter used in communication so as to complete the communication in association with a command group to execute a series of communications with plural radio-frequency tags 14 selected in response to a “Select” command once within a time interval in which the polarization-plane switching control portion 78 switches the polarization planes of the antenna.
10 Citations
9 Claims
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1. A radio-frequency tag communication device, having an antenna operative to switch polarization planes used a communication, and executing the communication of information with a radio-frequency tag and executing a control to switch the polarization planes of the antenna during the communication, the radio-frequency tag communication device comprising:
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a polarization-plane switching control portion operative to switch the polarization planes of the antenna within one-third of a time period preliminarily set in which a targeted radio-frequency tag stays in a communication field; and a communication control portion controlling at least one of a frequency, a modulating system, a response wait time and a commands order relevant to the communication such that the communication in association with a command group to execute a series of communications with plural radio-frequency tags selected in response to a predetermined selection command is completed once within a time interval in which the polarization-plane switching control portion switches the polarization planes of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio-frequency tag communication device, having an antenna operative to switch polarization planes used in a communication, executing the communication of information with a radio-frequency tag and executing a control to switch the polarization planes of the antenna during the communication, the radio-frequency tag communication device comprising:
a polarization-plane switching control portion operative to switch the polarization planes of the antenna each time when the communication in association with a command group to execute a series of communications with plural radio-frequency tags selected in response to a predetermined selection command is completed.
Specification