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Reference card used for calibrating reception sensitivity of non-contact read-write machine

A receiving sensitivity, non-contact technology, applied in the field of reference cards, can solve the problem of whether the reading and writing equipment can test the modulation signal of the reference card, etc., and achieve the effect of facilitating the receiving sensitivity

Inactive Publication Date: 2008-06-11
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1). In the range of different magnetic field strengths, it is necessary to continuously use the test PCD (specific parameters specified in 10373-6) to adjust the modulation load of the reference PICC, which is a very complicated process;
[0005] 2). On the same magnetic field strength, the specification does not propose whether the reading and writing equipment can test the modulation signal of the reference card when the modulation depth of the card specified in the ISO / IEC 14443 specification is not met.

Method used

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  • Reference card used for calibrating reception sensitivity of non-contact read-write machine
  • Reference card used for calibrating reception sensitivity of non-contact read-write machine
  • Reference card used for calibrating reception sensitivity of non-contact read-write machine

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Embodiment Construction

[0020] Invented reference card (e.g. figure 1 The physical size and implementation of) are the same as the physical size and physical implementation of the reference PICC specified by ISO / IEC FDIS 10373-6. The main difference is that the modulation load and switch matrix A and B are implemented differently. Physical layout design is required. It is recommended to make Into a matrix form.

[0021] If n=1, then the corresponding load modulation depth should be 30 / H 1.2 mV peak value (H should include 1.5~7.5A / m magnetic field strength).

[0022] If n>1, then there should be a set of corresponding load modulation depth should be 30 / H 1.2 mV peak value (H should include 1.5~7.5A / m magnetic field strength). The load modulation depth corresponding to other groups should be 10 / H 1.2 mV~90 / H 1.2 Within the mV peak range (H should include 1.5~7.5A / m magnetic field strength).

[0023] For a specific implementation, an example is as follows:

[0024] a). Set n=5, m=7;

[0025] b). m=7 can r...

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Abstract

The present invention puts forward a reference card for calibrating receiving sensitivity of non-contact reading-writing tools. One key performance index of a non-contact reading-writing tool is the sensitivity of receiving response signals sent by a non-contact card. As the modulation depth curve of the applicable non-contact card is determined, the non-contact card cannot be used for the sensitivity calibration of the reading-writing tool. The reference card of the present invention can change the magnitude of modulation load at different magnetic field intensities through a switch, so as to send modulation signals at different modulation depths to the non-contact tool. The present invention can be very conveniently used to calibrate the receiving sensitivity of the non-contact reading-writing tools.

Description

Technical field [0001] The invention designs a reference card specially used for calibrating the receiving sensitivity of a non-contact smart card reading and writing device. Background technique [0002] Contactless smart cards that comply with ISO / IEC 14443 Type A and Type B standards have been widely used. The card, read-write machine and PC equipment together constitute a non-contact card and machine read-write application system. ISO / IEC FDIS 10373-6 specifies the test methods for contactless smart card readers (PCD-Proximity Coupling Device) that comply with the ISO / IEC 14443 standard, including the maximum and minimum magnetic field strength test issued by PCD, power transmission test, PCD Modulation index test, PCD sending command signal waveform test (including rise time, fall time, overshoot, etc.), load modulation reception test. [0003] Although ISO / IEC FDIS 10373-6 specifies the receiving sensitivity test method of reading and writing equipment, the circuit diagram ...

Claims

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Application Information

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IPC IPC(8): G06K19/00
Inventor 周建锁
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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