ISO/TS 22239-1:2018

TECHNICAL ISO/TS
SPECIFICATION 22239-1
Second edition
2018-05
Road vehicles — Child seat presence
and orientation detection system
(CPOD) —
Part 1:
Specifications and test methods
Véhicules routiers — Système de détection de la présence d'un siège
enfant et de son orientation (CPOD) —
Partie 1: Spécifications et méthodes d'essai
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Principle . 3
5.1 General . 3
5.2 Compatibility . 4
6 System functionality . 6
7 Design recommendations . 8
7.1 General . 8
7.2 Installation of CPOD resonators into the CRS . 8
7.3 Installation of CPOD sensors into passenger seats .11
8 Design requirements .12
8.1 Requirements for CPOD child seats .12
8.2 Requirements for CPOD passenger seats .13
8.2.1 Passenger seat design . .13
8.2.2 CPOD sensor .13
8.2.3 Operating range for CPOD passenger seats .13
9 Compatibility measurements .13
9.1 General specification .13
9.2 Compatibility test parameters range .14
9.3 Adjustment of backrest inclination .14
9.3.1 Adjustment of CTB backrest angle, α .14
9.3.2 Adjustment of passenger seat backrest angle, φ .15
9.4 Compatibility measurements for the CRS .16
9.4.1 General compatibility test description .16
9.4.2 Compatibility test (Part 1) .17
9.4.3 Compatibility test (Part 2) .19
9.4.4 CRS functional test .21
9.5 Compatibility measurements for passenger seats .22
9.5.1 General test description .22
9.5.2 Determination of passenger-seat-specific detection/failsafe area .26
9.5.3 Compatibility test procedure for passenger seats .29
9.5.4 Test result interpretation .30
10 Labelling .30
Annex A (normative) Determination of the passenger seat reference point (CRP) .32
Annex B (normative) Geometrical descriptions .34
Annex C (normative) Detailed specification of the CPOD system functionality .38
Annex D (normative) CPOD child seat compatibility test bench .49
Annex E (normative) CPOD passenger seat compatibility test device.61
Annex F (normative) Additional definitions .65
Annex G (normative) Magnetic coupling factor measurement procedure .70
Bibliography .76
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 36,
Safety and impact testing.
This second edition cancels and replaces the first edition (ISO/TS 22239-1:2009), which has been
technically revised to take into account the development in technology since the first edition was
published.
A list of all parts in the ISO/TS 22239 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

Introduction
This document specifies a detection system for the automatic recognition of child seat presence and
orientation detection system (CPOD) child seats placed on CPOD passenger seats.
The purpose of this detection system is to improve the overall safety performance of passenger
restraint systems, particularly by reducing the risk of an airbag being deployed against a child seat
placed on a passenger seat.
The CPOD system is not intended to encourage the placing of children on the front passenger seats
of cars. However, in view of the fact that the following scenarios do occur in real life, children can be
placed on front passenger seats in these cases:
— in 2-seater vehicles, which have no rear seats;
— when there are more than 2 or 3 children in one vehicle;
— when back seats are folded down for the transport of cargo;
— when the installation of a rearward-facing child restraint system (CRS) and the placing of the child
in the CRS on the rear seats is very difficult or impossible, e.g. in 2-door vehicles;
— when the driver wants to see the baby and have easy access to it.
There might be benefit to be gained by encouraging the use of airbags on rear seats.
For the cases cited above, CPOD technology offers a reliable automatic solution for the protection of
children against any possible risk caused by non-deactivated airbags.
TECHNICAL SPECIFICATION ISO/TS 22239-1:2018(E)
Road vehicles — Child seat presence and orientation
detection system (CPOD) —
Part 1:
Specifications and test methods
1 Scope
This document specifies a child seat presence detection system that enables child seats placed on any
passenger seats to be automatically detected where a child is at risk from an active airbag. The system
provides the option of using additional information about the orientation of the child seat.
This document specifies the minimum functional requirements in order to ensure compatibility between
child seat presence and orientation detection system (CPOD) child seats and CPOD passenger seats.
Compatibility measurements and labelling requirements complement the obligatory specifications of
this document.
This document also provides design recommendations which are not compulsory when claiming
compliance with ISO/TS 22239. However, these recommendations, based on experience of proven
designs, provide useful guidance to designers to avoid erroneous designs and thus, enable designers to
reduce time and cost of CPOD development.
The tell-tale “child seat detected” required for a CPOD vehicle, the specific labelling required for a
CPOD vehicle and CPOD child seat and the detailed information about the CPOD system functionality
required for owner's manuals of CPOD vehicles and CPOD child seats will mitigate considerably the
misuse probability. The document does not provide a failsafe physical mechanism that prevents the
installation of non-CPOD child seats in a CPOD vehicle or vice versa.
ISO/TS 22239 applies only to child res
...