1、BRITISH STANDARD BS ISO 18738:2003 Lifts (elevators) Measurement of lift ride quality ICS 91.140.90 BS ISO 18738:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 8 August 2003 BSI 8 August 2003 ISBN 0 580 42399 9 National foreword This Br
2、itish Standard reproduces verbatim ISO 18738:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MHE/4, Lifts, hoists and escalators, which has the responsibility to: A list of organizations represented on this committee ca
3、n be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of
4、the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid e
5、nquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This
6、document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to17 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Referen
7、ce number ISO 18738:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 18738 First edition 2003-08-01 Lifts (elevators) Measurement of lift ride quality Ascenseurs Mesure de la qualit de dplacement dun ascenseur BSISO18738:2003IS:83781 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In
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12、G 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 3002 Allr ihgtsser edevrBSISO18738:2003IS:83781 O3002(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Terms and definitions
13、. 1 4 Measuring instrumentation 3 4.1 General. 3 4.2 Characteristics 3 4.3 Processing of vibration data 4 4.4 Environmental effects. 4 4.5 Sound measurement requirements. 4 4.6 Calibration requirements 4 5 Evaluation of ride quality . 5 5.1 Boundaries of calculation 5 5.2 Acceleration and decelerati
14、on. 6 5.3 Jerk. 7 5.4 Vibration. 8 5.5 Velocity. 10 5.6 Sound. 11 6 Procedure and expression of results 12 6.1 Preparation for measurement and expression of results . 12 6.2 Location of transducers . 12 6.3 Personnel. 14 6.4 Measurement process 14 6.5 Reporting of results 15 Annex A (normative) Calc
15、ulation of peak-to-peak vibration levels. 16 Annex B (normative) Calculation of constant and non-constant acceleration regions 17 BSISO18738:2003IS:83781 O3002(E) iv I SO 3002 All irhgts seredevrForeword ISO (the International Organization for Standardization) is a worldwide federation of national s
16、tandards 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
17、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. International Standards are drafted in accordance with the rules gi
18、ven in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least
19、 75 % of the member bodies casting a vote. 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. ISO 18738 was prepared by Technical Committee ISO/TC 178,
20、Lifts, escalators, passenger conveyors. BSISO18738:2003IS:83781 O3002(E) I SO 3002 All irhgts seredevr vIntroduction The objective of this International Standard is to encourage industry-wide uniformity in the definition, measurement, processing and expression of vibration and noise signals that com
21、prise lift ride quality. The aim of such uniformity is to benefit lift industry clients by reducing variability in the results of lift ride quality measurements caused by differences in the methods of acquiring and quantifying the signals. This International Standard is intended to be referred to by
22、 those parties interested in a) developing manufacturing specifications and calibration methods for instrumentation, b) defining the scope of the specifications for lift ride quality in contracts, and c) measuring lift ride quality in accordance with an International Standard. It is intended to prod
23、uce lift ride quality measurements which a) are simple to understand without specialized knowledge of noise and vibration analysis, b) correlate well with human response to ensure plausibility, and c) are accountable via calibration procedures which are traceable to national standards. This Internat
24、ional Standard refers to ISO 8041 and IEC 60651 and has drawn significantly on the considerable body of research implicit in these standards. However, several special challenges drawing on additional research and development were also recognized. Experience in the lift industry indicates that evalua
25、tion of vibration in terms of peak-to-peak levels is of particular relevance to passenger comfort. It was considered necessary for this International Standard to provide a dual form of expression, quantifying both the maximum peak-to-peak and A95 peak-to-peak vibration levels. To minimize the advers
26、e effects of external influences unique to the lift industry, it was considered necessary to prescribe the prerequisites and method of the measurement process as well as the relevant boundaries (start and end points) over which each signal is quantified. It was also considered necessary to analyse v
27、ertical vibration and vertical motion control separately in order to correlate with human response. Finally, through the inclusion of algorithms amenable to digital programming, this International Standard reflects the commercial need in the lift industry for instrumentation capable of rapid automat
28、ic computation of the required signal quantities. Analog systems may be used providing that the requirements of this International Standard are met. BSISO18738:2003blank BSISO18738:2003INTENRATIONAL TSANDADR IS:83781 O3002(E)I SO 3002 All irhgts seredevr 1Lifts (elevators) Measurement of lift ride q
29、uality 1 Scope This International Standard specifies requirements and methodology for the measurement and reporting of lift ride quality during lift motion. It does not specify acceptable or unacceptable ride quality. NOTE Lift performance parameters are often referenced in conjunction with lift rid
30、e quality. Parameters relevant to lift performance include jerk and acceleration. This International Standard defines and uses performance parameters where they are integral to the evaluation of ride quality. 2 Normative references The following referenced documents are indispensable for the applica
31、tion 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. ISO 2041:1990, Vibration and shock Vocabulary ISO 2631-1:1997, Mechanical vibration and shock Evaluation of human exp
32、osure to whole-body vibration Part 1: General requirements ISO 5805:1997, Mechanical vibration and shock Human exposure Vocabulary ISO 8041:1990 and Amd.1:1999, Human response to vibration Measuring instrumentation IEC 60651:2001, Sound level meters IEC 60804:2000, Integrating-averaging sound level
33、meters GUM:1993, Guide to the expression of uncertainty in measurement. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML 1)3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2041, ISO 5805, IEC 60804 and the following apply. 3.1 acceleration rate of change of z
34、-axis velocity, attributed to lift motion control NOTE It is expressed in metres per second squared (m/s 2 ). 1) This was corrected and reprinted in 1995.BSISO18738:2003IS:83781 O3002(E) 2 I SO 3002 All irhgts seredevr3.2 vibration variation with time of the magnitude of acceleration, when the magni
35、tude is alternately greater and smaller than a reference level NOTE 1 It is expressed in metres per second squared (m/s 2 ). NOTE 2 The deprecated unit Gal (Galileo) is sometimes used: 1 Gal = 0,01 m/s 23.3 A95 value of acceleration or vibration, within defined boundaries or limits, which 95 % of fo
36、und values equal or are less than NOTE 1 This value is used statistically to estimate typical levels. NOTE 2 See 5.2.3, 5.4.1 and 5.4.3. 3.4 velocity rate of change of z-axis displacement, attributed to lift motion control NOTE Velocity is reported as speed and direction of travel. It is given in me
37、tres per second (m/s). 3.5 V95 value of velocity, within defined boundaries or limits, which 95 % of found values equal or are less than NOTE 1 This value is used statistically to estimate typical levels. NOTE 2 See 5.5.3. 3.6 axes of measurement orthogonal reference axes for the measurements, where
38、 for lifts of conventional configuration, x is the perpendicular to the plane of the car front door (i.e. back to front), y is the perpendicular to x and z (i.e. side to side), z is the perpendicular to the car floor (i.e. vertical) NOTE For lifts of unconventional configuration, the axes should be
39、defined for directions of basicentric coordinate systems for mechanical vibrations influencing human subjects, for a standing person facing the front car door, in accordance with ISO 2631-1. 3.7 lift ride quality sound levels in the car, and vibration of the car floor, relevant to passenger percepti
40、on, associated with lift motion 3.8 jerk rate of change of z-axis acceleration, attributed to lift motion control NOTE 1 The passenger perception of vertical ride quality during jerk is represented by the assessment of vertical vibration during non-constant acceleration. See 5.3 and 5.4.3. NOTE 2 Je
41、rk is expressed in metres per second cubed (m/s 3 ). BSISO18738:2003IS:83781 O3002(E) I SO 3002 All irhgts seredevr 33.9 peak-to-peak vibration levels sum of the magnitudes of two peaks of opposite sign separated by a single zero crossing 3.10 sound A-weighted sound pressure level, in decibels 3.11
42、sound pressure level L p ten times the logarithm to the base 10 of the ratio of the square of the sound pressure to the square of the reference sound pressure NOTE The reference sound pressure level is 20 Pa (2 10 5Pa) 3.12 equivalent sound pressure level L Aeqaverage A-weighted sound pressure level
43、, using frequency weighting A and time weighting “fast”, determined within defined boundaries 4 Measuring instrumentation 4.1 General The measuring instrumentation shall consist of the following: a) transducers to measure acceleration in each of the three orthogonal axes; b) a transducer to measure
44、the sound pressure level; c) data acquisition system; d) data storage system; e) data processing system. 4.2 Characteristics The characteristics of the measuring instrumentation shall be as described in Table 1. BSISO18738:2003IS:83781 O3002(E) 4 I SO 3002 All irhgts seredevrTable 1 Characteristics
45、of measuring instrumentation Characteristic Vibration Acceleration Sound Frequency weighting Whole body x, y, z (see ISO 8041) N/A A weighting, (see IEC 60651) Band limiting See ISO 8041 10 Hz low-pass filter, (2-Pole Butterworth) N/A Accuracy aType 1 (see ISO 8041) Type 1 (see ISO 8041) bType 2 (se
46、e IEC 60651) Time weighting N/A N/A Fast (see IEC 60651) Environmental See ISO 8041 See ISO 8041 See IEC 60651 Resolution 0,005 m/s 20,01 m/s 21 dB Measurement range 20 % above max. instantaneous acceleration to 20 % below min. instantaneous acceleration c20 % above max. acceleration to 20 % below m
47、in. acceleration d2 dB below min. to 5 dB above max. eN/A = not applicable aThe signals shall be filtered to exclude aliasing. bAccuracy in the range from 0 Hz to 1 Hz shall be equal to the accuracy specified for 1 Hz in ISO 8041. cA range of 1,5 m/s 2to +1,5 m/s 2should meet the above requirement.
48、dA range of 7 m/s 2to 13 m/s 2should meet the above requirement. eA range from 30 dB to 90 dB (A-weighted) should meet the above requirement. 4.3 Processing of vibration data Vibration data shall be weighted in accordance with ISO 8041 to simulate the human bodys response to vibration. The vibration
49、 signals shall be frequency weighted with the whole body x, y and z weighting factors and band limiting as defined in ISO 8041. For digital sampling systems, uncompressed data shall be used. 4.4 Environmental effects The instrumentation shall comply with the criteria for mechanical vibration, temperature range and humidity range specified in ISO 8041. 4.5 Sound measurement requirements The sound measuring system shall comply with the re
