identification card test method

Identification Card Test Method

辨識與安全科技中心

張博光經理

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Content

ISO 10373 IntroductionTest equipment set upProximity Card test method

PICC (Proximity Card, Card) PCD (Proximity Coupling Device, Reader)

Functional Test Conclusion

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ISO 10373 Introduction

Part 6 : Proximity cards ISO 14443 Protocol (< 10cm)High security Card

Part 7 : Vicinity cards ISO 15693 Protocol (up to 1 meter)Library

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Identification Cards Test Apparatus

Test PCD AssemblyCalibration coil

Reference PICCSignal Generator (PCD)Digital Sampling Oscillocope

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Test equipment and test circuits(1)

Calibration coilAt 13.56MHz the approximate inductance is 200nH and the approximate resistance is 0.25ohmThickness : 0.76mm+- 10%Corner radius : 5mmThe area over which the field is integrated is approximately 3000mm2The size of connections pads shall be 1.5mmx1.5mm

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Test equipment and test circuits(2)

Test PCD (Proximity Coupling Device) assembly

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Test equipment and test circuits(3)

Test PCD Antenna tuning step 1

Match the impedance of the signal from signal generator to 50 Ohm

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Test equipment and test circuits(4)Test PCD Antenna tuning step 2

Tune the phase to 0 to match the impedance of the antenna to signal generator (50 Ohm)

Before tuning

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Test equipment and test circuits(5)Reference PICCs

L C1 C3

R1 R2

R3C4

C2

C1: Stray capacitance < 5 pF Jumper settings:J1 a: min. fieldstrength b: max. fieldstrength

J1

a b

D1 D2

D3 D4VDC

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Functional Test

Function test – PICCAlternating magnetic field testAmplitude of the PICC load modulation signal

Function test – PCDPCD field strengthModulation index and waveform

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Function test - PICCCatch the response of PICC

Connect to Osilloscope and monitor the field strength of PCD

PICC under test

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Alternating magnetic field test - PICC

Alternating magnetic field test10A/m rms (5 mins) Remove the PICC at least 5 sec5 minutes an ASK 100% modulation to this field with the following duty cycle

5 sec at 0 A/m rms25 sec at 12 A.\/m rms

Check the PICC operates as intended

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Function test - PICCCatch the response of PICC

•We get 4 subcarrier cycles for DFT process

• Get the Amplitude of the PICC load modulation signal

PCD PICC

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Function test - PCDPCD field strength

Hmax (7.5A/m) : Maximum fieldstrength of the PCD antenna fieldHmin (1.5A/m) :Minimum fieldstrength of the PCD antenna field

Reader

Reference PICC

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Function test - PCD

Modulation index and waveform

Reader

Calibration coil

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Function test - PCDModulation index and waveform

t1

t4

t3t3

t2

60%90%

100%

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Conclusion

Function test – PICCAlternating magnetic field testAmplitude of the PICC load modulation signal

Determine the amplitude of PICC load modulation signal can be detected by PCD

Function test – PCDPCD field strength

Determine the PCD is able to supply a certain power to PICCModulation index and waveform

Determine the index modulation of the PCD field as well as the rise and fall times and the overshoot values as defined in ISO/IEC 14443-2