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Evaluating an electromagnetic field strength of an electromagnetic gate apparatus

A technology of electromagnetic gate and field strength, which is applied in the fields of electromagnetic field characteristics, electrical components, and near-field transmission systems in radio frequency identification systems. It can solve the problems of reading rate dependence, achieve high resolution and measurement range, and optimize label positioning Effect

Inactive Publication Date: 2010-12-08
NXP BV
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  • Summary
  • Abstract
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Problems solved by technology

[0004] A drawback of RFID technology is that when one or more RFID tags are read by a reader device (also known as a magnetic gate device), the read rate may depend on the position of each RFID tag relative to the reader device , which is due to the position-dependent or space-dependent field distribution in the operating range of the electromagnetic gate device

Method used

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  • Evaluating an electromagnetic field strength of an electromagnetic gate apparatus
  • Evaluating an electromagnetic field strength of an electromagnetic gate apparatus
  • Evaluating an electromagnetic field strength of an electromagnetic gate apparatus

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Embodiment Construction

[0041] The illustrations in the figures are schematic. In different figures, similar or identical elements bear the same reference signs.

[0042] figure 1 A communication system 100 according to an exemplary embodiment of the present invention is shown. The communication system 100 comprises an electromagnetic gate arrangement 120 , for example a UHF gate application adapted to generate an electromagnetic field in an operating range between a first part 140 and a second part 142 of the electromagnetic gate arrangement 120 . In addition, a device 110 for evaluating the electromagnetic field strength / field geometry of the electromagnetic gate arrangement 120 is provided.

[0043] figure 1 The illustrations are not to scale. The size of electromagnetic gate device 120 (eg, decimeters to meters) is typically much larger than the size of device 110 (eg, several centimeters). The device 110 can "mimic" a transponder tag and can be used to analyze the field distribution in or a...

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Abstract

A device (110) for evaluating an electromagnetic field strength / field geometry of an electromagnetic gate apparatus (120) is provided, the device (110) comprising a measurement unit (112) adapted for receiving a measurement signal from the electromagnetic gate apparatus (120) and determining a value of the field strength of said measurement signal, a communication unit (114) adapted for receiving command data from the electromagnetic gate apparatus (120) and adapted for sending response datato the electromagnetic gate apparatus (120). Optionally, the device (110) comprises an evaluation unit (116,118) adapted for evaluating the electromagnetic field geometry of the electromagnetic gate apparatus (120) based on said values of the field strength received from the measurement unit (112).

Description

technical field [0001] The invention relates to a device for evaluating the electromagnetic field strength of an electromagnetic door arrangement. Furthermore, the invention relates to a method for evaluating the electromagnetic field strength of an electromagnetic door arrangement. Background technique [0002] The importance of automatic identification systems is increasing especially in the service industry, the logistics sector, the commercial sector and the industrial production sector. A further application of the identification system involves the identification of people and animals. [0003] In particular, contactless identification systems such as transponder systems (eg using RFID tags) are suitable for fast wireless transmission of data without annoying cable connections. Such systems use the emission and absorption of electromagnetic waves, especially in the high frequency domain. [0004] A drawback of RFID technology is that when one or more RFID tags are r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00G01R29/08
CPCG06K7/0008H04B17/318H04B5/77
Inventor 杰拉尔德·维德涅格迈克尔·布克曼龙尼·朔马克
Owner NXP BV
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