1、 IEC 61920 Edition 2.0 2004-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Infrared free air applications Applications infrarouges en mode non guid IEC 61920:2004 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2004 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part
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15、ous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61920 Edition 2.0 2004-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Infrared free air applications Applications infrarouges en mode non guid INTERNATIONAL ELECTROTECHNICAL COMMISSION COMM
16、ISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 31.260; 33.100 PRICE CODE CODE PRIX ISBN 978-2-83220-242-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an au
17、thorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61920 IEC:2004 CONTENTS FOREWORD . 3 1 Scope and object 5 2 Normative references 5 3 Terms and definitions . 6 4 Symbols . 9 4.1 General . 9 4.2 Radiators . 9 4.3 Receivers 9 5 Cl
18、assification 10 5.1 General . 10 5.2 Physical characteristics of radiators . 10 5.2.1 General . 10 5.2.2 Ranges of wavelength (criterion 1) . 10 5.2.3 Ranges of frequency (criterion 2) . 12 5.2.4 Radiant intensity (criterion 3) . 12 5.2.5 Angle of radiation (criterion 4) 12 5.2.6 Duration of radiati
19、on (criterion 5) 12 5.2.7 Identification example for a radiator . 13 5.3 Physical characteristics of receivers. 13 5.3.1 General . 13 5.3.2 Ranges of wavelength and selectivity (criterion 6) 13 5.3.3 Frequency response (criterion 7) 14 5.3.4 Sensitivity (criterion 8) . 14 5.3.5 Directivity (criterio
20、n 9) 14 5.3.6 Example of a receiver 14 5.4 Tolerances 15 5.4.1 Measurement conditions 15 5.4.2 Tolerances of data . 15 5.5 Product groups 17 5.6 User areas. 18 5.7 Graphical representation of IR systems 18 6 Method for minimizing mutual interferences 20 7 Marking 21 8 Relationship between IR basic s
21、tandard and application standards 21 Annex A (informative) Example for possible priorization 22 Annex B (informative) Examples of /f-diagrams. 23 Annex C (informative) Survey of standardization activities in the field of Infrared . 27 Bibliography 28 61920 IEC:2004 3 INTERNATIONAL ELECTROTECHNICAL C
22、OMMISSION _ INFRARED FREE AIR APPLICATIONS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all
23、questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publica
24、tion(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC
25、 collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opi
26、nion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to
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28、y to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be render
29、ed responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its
30、 technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any othe
31、r IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the
32、subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61920, has been prepared by technical area 3, Infrared systems and applications, of IEC technical committee 100: Audio, video and multimedia systems and equipment. Th
33、is second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2004-01. The text of this standard is based on the following documents: FDIS Report
34、 on voting 100/717/FDIS 100/749/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. 4 61920 IEC:2004 This publication has been drafted in accordance with t
35、he ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publica
36、tion indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 61920 IEC:2004 5 INFRARED FREE AIR APPLICATIONS 1 Scope and object This International Standard describes the cla
37、ssification of IR devices into groups and classes in order to identify and clarify problems caused by mutual interference. Mutual interference is caused by the increasing parallel application of different infrared (IR) systems. Due to its physical characteristics, the possibility of local limitation
38、 is a special feature of IR radiation. In this standard, the wavelength range from 700 nm to 1 600 nm is considered. All systems based on free air application which intentionally or unintentionally use IR radiation in this range, are included. Products which unintentionally emit IR radiation, such a
39、s illumination equipment are not deemed to be IR application systems. They are, however, integrated into this standard in order to enable facility planners to take into consideration and to foresee provisions against disturbance of IR application systems by such unintentionally emitted radiation. Th
40、e object of this standard is to prevent or at least to minimize mutual interference and to allow the coexistence of different IR products. It is intended to identify each IR product by its characteristics, according to the classification criteria. It is not the object of this standard to describe th
41、e consequences of interference between IR systems or safety aspects of optical radiation. All applications of fibre-optic technology are excluded. In this context “free air” means freely radiated IR in indoor or outdoor applications. If the IR systems are used for information transmission, this stan
42、dard is only relevant in connection with the physical layer of the open systems interconnection (OSI) reference model (ISO 7498-1). NOTE The reader should be aware that a risk of interference between different infrared systems as assessed by this standard is based on general parameters and therefore
43、 cannot take all the parameters involved into account. In many cases the practical results may differ from those expected, for example the positioning of sender and receiver and the choice of advanced coding and decoding schemes. All these factors beyond the physical layer may have an effect on the
44、final result. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-71
45、3:1998, International Electrotechnical Vocabulary (IEV) Part 713: Radio- communications: transmitters, receivers, networks and operation IEC 60050-845:1987, International Electrotechnical Vocabulary (IEV) Chapter 845: Lighting IEC 60417-DB:2002 1 , Graphical symbols for use on equipment _ 1DB refers
46、 to the IEC on-line database. 6 61920 IEC:2004 IEC 60747-5-1:1997, Discrete semiconductor devices and integrated circuits Part 5-1: Optoelectronic devices General ISO/IEC 7498-1:1994, Information technology Open systems interconnection Basic reference model: The basic model 3 Terms and definitions F
47、or the purposes of this document, the following terms and definitions apply: 3.1 bandwidth (of a receiver, amplifier or network) extent of a continuous range of electrical frequencies or optical wavelengths over which the response does not differ from its nominal value by more than a specified amoun
48、t IEV 713-06-19, modified 3.2 directivity defined by two angles Aand Bfor describing the dependence of the receivers sensitivity from the direction of incidence. The direction in which the receiver output V mV is maximum might be called optical receiver axis. s max. /2 s max. /2 s max. s max. /2 s m
49、ax. /2 B A IEC 2895/03Figure 1 Directivity and related characteristics In a sensitivity diagram, the two angles Aand Bwithin which the sensitivity is greater than or equal to half of the maximum sensitivity (see Figure 1) characterize the directivity IEC 60747-5-1, 6.3.5.2, modified 3.3 fluorescent lamp discharge lamp of the low pressure mercury type in which most of the light is emitted by one or several layers of phosp
