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1、BRITISH STANDARD AUTOMOBILE SERIES CONFIRMED SEPTEMBER 1990 BS AU 152:1970 Specification for Rear marking plates for vehicles Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 152:1970 This British Standard
2、, having been approved by the Automobile Industry Standards Committee, was published under the authority of the Executive Board of the Institution on 30 April 1970 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment 69/10282 ISBN
3、0 580 06160 4 Foreword This British Standard has been prepared under the authority of the Automobile Industry Standards Committee of BSI at the request of the Ministry of Transport. Its purpose is to provide a specification for rear marking plates for vehicles to be used in accordance with the appro
4、priate Regulation in order to give following vehicles adequate warning, both by day and by night, of particular types or lengths of vehicles which might constitute a hazard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are resp
5、onsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. This standard has
6、been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40
7、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 152:1970 BSI 02-2000i Contents Page ForewordInside front cover 1Scope1 2Definitions1 3Design1 4Type test1 5Marking1 6Materials1 7Preparation and finish of plates1 8Reflex reflecting and fluorescent surfaces1 9Letters and borders2 10Adhesive marking p
8、lates2 11Colour2 12Photometric requirements2 13Accelerated weathering3 14Bending and corrosion4 15Fuel resistance4 16Bonding strength4 17Water resistance4 18Thermal resistance4 19Abrasion resistance4 20Attachment of marking plates to the vehicle with adhesive4 21Attachment of individual letters and
9、borders by adhesive5 22Rigidity of suspended marking plates5 Appendix A Terms and symbols relating to reflex-reflecting devices6 Appendix B Apparatus and method for accelerated weathering test7 Figure 1 Explanatory diagram of symbols used7 Figure 2 Types of rear marking plates9 Figure 3 Apparatus fo
10、r accelerated weathering test: assembled views10 Figure 4 Apparatus for accelerated weathering test: details of spray nozzles11 Figure 5 Arrangements for measurement of reflective intensity of wet reflectorized test specimens12 Table 1 Reflex-reflecting material: chromaticity limits2 Table 2 Fluores
11、cent material: colour limits before and after weathering2 Table 3 Minimum CIL per square metre of reflex-reflecting surfaces in candelas per lux3 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank License
12、d Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 152:1970 BSI 02-20001 1 Scope This British Standard specifies requirements for marking plates faced with reflex-reflecting and fluorescent materials for fitting to
13、 the rear of certain vehicles and trailers. The standard includes requirements for colorimetric and photometric properties and tests for certain physical requirements. 2 Definitions For the purposes of this British Standard the following definitions, together with those given in Appendix A, apply: 2
14、.1 rear marking plate a rectangular backing plate faced with reflex-reflecting and fluorescent materials and, where appropriate, letters, as prescribed in this specification NOTE 1The direct attachment with adhesive of reflex-reflecting and fluorescent materials only to the vehicle does not constitu
15、te a rear marking plate for the purposes of this British Standard. 2.2 sample unit a complete rear marking plate, as used NOTE 2Photometric units such as lumen (lm), candela (cd), etc., are as defined in BS 233, “Glossary of terms used in illumination and photometry”. 3 Design 3.1 Dimensions. Five t
16、ypes of rear marking plates are specified, as shown in Figure 2. NOTEExcept for the mounting position on the vehicle, Types 2 and 3 are identical. The dimensions of the plates and of the reflex-reflecting and fluorescent areas and the proportions of the letters shall be as prescribed or otherwise au
17、thorized in the appropriate Regulation. 3.2 Stiffening. When rear marking plates are to be freely suspended from a vehicle they shall be stiffened either by flanges integral with the plate and forming part of it, or by means of a separate stiffening structure. Such separate stiffening need not be in
18、cluded in the sample unit for the purpose of the bending and corrosion test in Clause 14. Rear marking plates that have been stiffened shall comply with the requirements of Clause 22. 4 Type test Representative sample units shall be submitted to an independent testing authority for type testing. The
19、 number of sample units to be selected for testing shall be agreed between the manufacturer and the testing authority but will normally comprise not less than two representative samples of Types 1, 2 or 3, two of Type 4 and two of Type 5. All the sample units submitted shall comply with all the requ
20、irements in this standard. 5 Marking Each rear marking plate shall be permanently and legibly marked, in such a position as to be clearly visible when the marking plate is fitted to the vehicle, with the following information: 1) The name, trade mark or other means of identification of the maker. 2)
21、 The number of this British Standard, i.e. BS AU 152. NOTEAttention is drawn to certification facilities offered by BSI; see the inside back cover of this standard. 6 Materials Rear marking plates may be manufactured from any suitable material which shall perform satisfactorily in service and satisf
22、y the requirements of this standard. 7 Preparation and finish of plates Before the application of the reflex-reflecting and the fluorescent surfaces, the surface of the backing plate shall be free from grease, oil, dirt and any loose or temporary coatings and shall be suitable for and adequate to re
23、ceive the materials to be applied. 8 Reflex-reflecting and fluorescent surfaces 8.1 Any material may be used for the reflex-reflecting and the fluorescent areas or borders provided that it is applied so as to give the appearance of a continuous surface and that it complies with all the relevant requ
24、irements of this standard. 8.2 Where holes are pierced for fixing the rear marking plate to the vehicle or for attaching letters to the marking plate, such holes shall be adequately-protected against any deleterious effect on the applied surface material. Where, after the marking plate has left the
25、makers works, it may be pierced with holes which can have a subsequent deleterious effect on the reflex-reflecting or fluorescent material, the marking plate maker shall attach to each plate a label giving adequate instructions for suitably fixing the plate to the vehicle in order to prevent such de
26、leterious effect. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 152:1970 2 BSI 02-2000 9 Letters and borders Letters and borders shall be securely attached to the rear marking plate so that they cannot
27、be readily detached therefrom. 10 Adhesive marking plates Where a rear marking plate is intended to be attached to the vehicle with adhesive, the marking plate maker shall give adequate instructions for the preparation of the surface to which it is to be attached and shall state the materials or sur
28、faces for which the attachment of his marking plate is unsuitable. 11 Colour 11.1 The colour of the reflex-reflecting material, the fluorescent material and the letters shall be as indicated in Figure 2, as appropriate. 11.2 Reflex-reflecting material 11.2.1 When the yellow reflex-reflecting surface
29、 is illuminated by CIE Standard Illuminant A1), with an observation angle of % and an entrance angle V = 5, H = 0, the chromaticity values shall be within the area on the chromaticity diagram defined in Table 1. The colour shall have chromaticity co-ordinates which lie within the area formed by the
30、straight lines defined by the pairs of points 1 and 2; 2 and 3; 3 and 4; and the spectrum locus. 11.2.2 When the yellow reflex-reflecting surface is illuminated by CIE Standard Illuminant C2) under the condition of normal incidence 10 and viewed at 45, the luminance factor shall be 29 % min. and 39
31、% max. 11.3 Fluorescent material. The fluorescent material, when illuminated by CIE Standard Illuminant C2) under the condition of normal incidence 10 and viewed at 45, shall have a dominant wavelength, purity and luminance factor in accordance with the values given in Table 2. NOTEThe luminance fac
32、tor includes both the reflected and the fluorescent luminous flux. 11.4 Letters. The letters on the Types 4 and 5 rear marking plates shall be black in colour and when illuminated normally by CIE Standard Illuminant C2) and viewed at 45 they shall have a maximum luminance factor of 5 %. 12 Photometr
33、ic requirements The coefficient of luminous intensity (CIL) of the reflex-reflecting surfaces of the marking plate, when illuminated by CIE Standard Illuminant A3), shall be measured for each of the observation angles and the entrance angles specified in Table 3. The CIL at any of the test points in
34、 Table 3 at the 2 observation angle shall not exceed 150 cd/lx. For making the necessary measurements, either of the methods recommended by the CIE or the Road Research Laboratory4) for the photometry of reflex-reflecting surfaces shall be used. The normal axis to the plate shall be taken as the H-V
35、 direction. The plate shall not be rotated and all measurements shall be made for & = 0. The angular subtense values and shall not exceed 0 5. NOTEAn explanation of the terms and symbols used is given in Appendix A. Table 1 Reflex-reflecting material: chromaticity limits Table 2 Fluorescent material
36、: colour limits before and after weathering 1) As defined in the proceedings of the 1951 meeting of the International Commission on Illumination (CIE). 2) As defined in the proceedings of the 1931 meeting of the International Commission on Illumination (CIE). 3) As defined in the proceedings of the
37、1951 meeting of the International Commission on Illumination (CIE). 4) See Road Research Technical Paper No. 42, “Reflex reflectors”. ColourCo-ordinate Chromaticity co-ordinates of points at the corners of the area on the chromaticity diagram 1234 Yellow x y 0.538 0.460 0.520 0.460 0.560 0.420 0.579
38、 0.420 Exposure Dominant wavelengthExcitation purityLuminance factor Min.Max.Min.Min.Max. Unexposed 300 hours exposure nm 610 600 nm 617 % 95 92 % 31 % 60 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 1
39、52:1970 BSI 02-20003 Table 3 Minimum CIL per square metre of reflex-reflecting surfaces in candelas per lux 13 Accelerated weathering 13.1 Procedure. For each test two identical specimens of a sample unit (see Clause 2) are taken. One specimen shall be stored in the dark in a dry container for subse
40、quent use as the “reference unexposed specimen”. The second specimen shall be exposed for 1 200 hours to an atmospheric weathering test using the apparatus and the method described in Appendix B. After the test the specimen shall be washed in a dilute neutral detergent solution and examined for comp
41、liance with the requirements specified in 13.2 to 13.5 inclusive. 13.2 Visual appearance. No area of the exposed specimen shall show any evidence of cracking, scaling, pitting, blistering, de-lamination, distortion, blooming, staining, corrosion or chalking. There shall be no shrinkage in excess of
42、0.5 % in any linear direction and no evidence of any adhesion failure such as edge lifting from the substrate. 13.3 Colour fastness 13.3.1 Reflex-reflecting material. The colour of the exposed specimen when compared with that of the “reference unexposed specimen” (see 13.1) shall have a fastness rat
43、ing of not less than 3 when measured by the Geometric Grey Scale in BS 26625). 13.3.2 Fluorescent material. After exposure for 300 hours to an atmospheric weathering test, using the apparatus and method described in Appendix B and washing as in 13.1, the specimen shall be examined for compliance wit
44、h 13.2. In addition, when illuminated by CIE Standard Illuminant C6) under the condition of normal incidence 10 and viewed at 45, any shift in dominant wavelength and change in purity and luminance factor shall be such that the values are within the limits given in Table 2. 13.4 Effect on CIL value
45、of reflex-reflecting material 13.4.1 For this test, measurements shall be made only at an entrance angle of 5 and an observation angle of 0 12 by the method given in Clause 11. 13.4.2 The CIL of the exposed specimen when dry shall be not less than 80 % of the relevant value in Table 3. 13.4.3 The sp
46、ecimen shall then be subjected to a fine water spray using the apparatus shown in Figure 5 and kept continuously wetted. The CIL of the specimen under this condition shall be not less than 90 % of the value obtained when measured dry in 13.4.2. 13.5 Effect of dirt on reflex-reflecting material 13.5.
47、1 The tests shall be made using the same exposed specimen and after the tests described in 13.4. 13.5.2 The dry specimen shall first be artificially dirtied by the application of a layer of graphite grease thick enough to obscure the face of the specimen. The layer of grease shall then be removed by
48、 washing with a clean mixture of water and a neutral detergent. A soft bristle brush may be used to assist in the removal of the dirt, if necessary. 13.5.3 The specimen shall then be tested in accordance with Clauses 11 and 12 and shall comply with the following requirements: 1) The luminance factor
49、 shall be not less than 80 % of the minimum value specified in 11.2.1. 2) The CIL value at an entrance angle of 5 and an observation angle of 0 12 shall be not less than 80 % of the relevant minimum value specified in Table 3. Colour Observation angle Entrance angle Vertical:HHH Horizontal: 5 left and 5 right 30 left and 30 right 45 left and 45 right Yellow0 12 2 cd/lx 18 2 cd/lx 7 0.75 cd/lx 2.5 0.4 5) BS 2662, “Grey scale for assessing change in colour” (contained in BS 2661-86 & BS 3661, “Methods for