ISO/TS 22239-2:2018

TECHNICAL ISO/TS
SPECIFICATION 22239-2
Second edition
2018-05
Road vehicles — Child seat presence
and orientation detection system
(CPOD) —
Part 2:
Resonator specification
Véhicules routiers — Système de détection de la présence d'un siège
enfant et de son orientation (CPOD) —
Partie 2: Spécifications relatives aux résonateurs
Reference number
©
ISO 2018
© ISO 2018
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Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 CPOD resonator components . 2
5 Coil requirements . 2
6 Electrical properties . 3
6.1 Digital resonator protocol . 3
6.2 Subcarrier bitstream . 5
6.3 Modulation . 7
6.3.1 General. 7
6.3.2 Useful resonator signal, Ф (t) . 8
RESO,NORM
6.3.3 Lowpass filtering .11
6.3.4 Spectral contents of Ф (t) .11
RESO,NORM
6.3.5 The useful signal, Θ (f ,H ) .13
TX TX
6.3.6 The useful signal power, P (f ,H ).13
Θ TX TX
6.3.7 Noise power, P (f ,H ) .13
NOISE TX TX
6.3.8 The signal-to-noise ratio (SNR) .15
6.3.9 Definition of W(H ) .15
TX
6.3.10 Definition of N(H ) .16
TX
6.4 Modulation parameters .17
7 Resonator timing .19
7.1 General .19
7.2 Power-up .20
7.3 Reset .20
7.4 Relevant timing and reset parameters .21
8 Electrical and environmental parameters .22
8.1 Absolute maximum ratings .22
8.2 Operating ranges .23
8.3 Storage conditions .23
9 CPOD resonator compatibility test .23
10 Resonator environmental qualification .23
10.1 Application profile .23
10.2 Common test parameters .25
10.3 Operating states .25
10.3.1 General.25
10.3.2 Operating state A (transport and storage) .25
10.3.3 Operating state B (non-functional state) .25
10.3.4 Operating state C (functional state) .25
10.3.5 Operating state D (intermitting functional state) .26
10.4 Parametrical test and parameter checking .26
10.4.1 Parametrical test before/after every single test .26
10.4.2 Continuous parameter check .26
10.5 Qualification tests .26
10.5.1 General.26
10.5.2 Acceptance criteria .26
10.5.3 Temperature storage (transport and storage) .26
10.5.4 Low temperature durability test .27
10.5.5 High temperature operating endurance test .27
10.5.6 Power thermal cycle endurance (PTCE) .28
10.5.7 Thermal shock test .29
10.5.8 Temperature cycling test, constant humidity .30
10.5.9 High temperature and humidity endurance (HTHE) .31
10.5.10  Vibration test.31
10.5.11  Mechanical shock test .33
10.5.12  Fall test, not packed .34
10.5.13  Protection against intrusion of hard bodies .34
10.5.14  Protection against intrusion of fluids .35
10.5.15  Corrosion test with gutting corrosion gas .35
10.5.16  Salt spray test .36
10.5.17  Resistance to chemical substances.36
10.6 Electromagnetic compatibility (EMC) test .38
10.6.1 General.38
10.6.2 Functional status qualification .38
10.6.3 Acceptance criteria .39
10.6.4 Community .39
10.7 Electrostatic discharge (ESD) test .47
10.7.1 Test parameters .47
10.7.2 Discharge locations . .47
10.7.3 Powered-up test .48
10.7.4 Packaging and handling test (unpowered test) .49
10.8 Magnetic field stress test .49
10.8.1 Test parameters .49
10.8.2 Test procedure .49
10.8.3 Acceptance criteria .49
10.9 Qualification flow chart .50
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