GB 15084:2022 Motor vehicles—Device for indirect vision-Requirement of performance and installation English
Motor vehicles — Devices for indirect vision — Requirements of performance and installation
1 Scope
This document specifies the technical requirements, test methods, installation requirements and judgment of the same type of devices for indirect vision on vehicles of categories M and N and on vehicles of category L with bodywork at least partly enclosing the driver.
This document is applicable to devices for indirect vision on vehicles of categories M and N and on vehicles of category L with bodywork at least partly enclosing the driver.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute indispensable requirements 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.
GB 11552 The interior fittings of passenger car
GB 34660 Road vehicles — Requirements and test methods of electromagnetic compatibility
ISO 9241-305 Ergonomics of human-system interaction — Optical laboratory test methods for electronic visual displays
ISO 15008 Road vehicles — Ergonomic aspects of transport information and control systems — Specifications and compliance procedures for in-vehicle visual presentation
ISO 16505 Road vehicles — Ergonomic and performance aspects of Camera Monitor Systems Requirements and test procedures
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
devices for indirect vision
devices intended to give a clear view of the rear, side or front of a vehicle within the defined fields of vision
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3.2
mirror
device intended to give a clear view to the rear, side or front of a vehicle within the defined fields of vision by means of a reflective surface
Note: Complex optical systems such as periscope are excluded.
3.3
interior mirror
device intended to give a clear view to the rear of the vehicle, which can be fitted in the passenger compartment of a vehicle
3.4
exterior mirror
device intended to give a clear view to the rear, side or front of a vehicle, which can be mounted on the external surface of the vehicle
3.5
surveillance mirror
mirror intended to provide additional fields of vision, which can be mounted on the external surface or in the passenger compartment of a vehicle
3.6
radius of curvature
r
average of the radii of curvature measured over the reflecting surface
3.7
spherical surface
surface which has a constant and equal radius in
horizontal and vertical directions
3.8
aspherical surface
surface which has only in one plane a constant radius
3.9
aspherical mirror
mirror composed of a spherical and an aspherical part
3.10
centre of the reflecting surface
geometric centre of the visible area of the reflecting surface
3.11
radius of curvature of the constituent parts
c
radius of the arc of the circle which most closely approximates to the curved form of the part in question
3.12
camera-monitor system; CMS
device for indirect vision, where the field of vision is obtained by means of a camera-monitor combination
3.13
camera
device that renders an image of the outside world and then converts this image into a signal
3.14
monitor
device that converts a video signal into images that are rendered into the visual spectrum
3.15
vision support system
system to enable the driver to detect and/or see objects in the area adjacent to a vehicle
3.16
luminance contrast
brightness ratio between an object and its immediate background/surrounding
3.17
resolution
smallest detail that can be discerned with a perceptual system, i.e. perceived as separate from the larger whole
3.18
critical object
cylindrical object with a height of 0.5 m and a diameter of 0.3 m
3.19
detection distance
distance measured from the centre of the lens of the camera to the point at which a critical object can just be perceived
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3.20
field of vision
section of the tri-dimensional space which is monitored with the help of a device for indirect vision, based on the view on ground level offered by the device for indirect vision and limited by the maximum detection distance
3.21
smear
bright line displayed on the monitor while sun light or light from other bright light sources is directly hitting into the lens of the camera
3.22
mirror and CMS dual function system
device for indirect vision with both mirror and CMS functions
3.23
point light source detection factor
PLSDF
level of distinctness of a pair of point light sources, based on luminance intensities and horizontal and vertical dimension of the rendition on the monitor
3.24
point light source contrast factor
PLSCF
level of distinctness of a pair of point light sources, based on luminance differences between the maximum luminance and the minimum luminance of the luminance profile in the horizontal direction
3.25
driver′s ocular points
two points 635 mm vertically upward from the driver's seat point R, vertical to the longitudinal reference plane of the vehicle, and 65 mm apart
3.26
forward control cab
cab of vehicle with more than half of its engine length behind the front end of the windshield
3.27
ocular reference point
The midpoint between the driver's ocular points
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4 Technical requirements
4.1 Class of device for indirect vision
The devices for indirect vision are classified as follows:
a) Class I, giving the interior and rear field of vision;
b) Class II, giving the main exterior and rear field of vision;
c) Class IV, giving wide-angle exterior field of vision;
d) Class V, giving close-proximity field of vision;
e) Class VI, giving the front field of vision;
f) Class VII, giving the field of vision in L category vehicles of category L (with bodywork at least partly enclosing the driver).
4.2 Mirror
4.2.1 General requirements
4.2.1.1 All types of mirrors shall have adjustment function.
4.2.1.2 For Class I mirrors, if the edge of the reflecting surface is enclosed in the protective frame (such as support), the radius of curvature of the constituent parts c of all points on the periphery of the protective frame in any direction shall not be less than 2.5 mm. If the edge of the reflecting surface is out of the protective frame, the radius of curvature of the constituent parts c of protrusion edges in any direction shall not be less than 2.5 mm.
4.2.1.3 For Class I-VII mirrors, if the edges of the reflecting surface are enclosed in the protective frame (such as support), the radius of curvature of the constituent parts c of all points on the periphery of the protective frame in any direction shall not be less than 2.5 mm. If the edge of reflecting surface extends beyond the protective frame, the radius c of the protrusion edge in any direction shall not be less than 2.5 mm and the protrusion shall return to the protective frame under a force of 50 N which is parallel to the vehicle longitudinal reference plane and applied horizontally to the highest point of the reflecting surface protruding from the protective frame.
4.2.1.4 After being tested according to the requirements of 5.2, the mirror shall be mounted on a surface at any adjustable position. For the following parts, the radius of curvature of the constituent parts c shall not be less than 2.5 mm:
a) All parts of the Class I mirrors that can contact the sphere with a diameter of 165 mm, including the parts that maintain connection with the support;
b) All parts of the Class II-VII mirrors that can contact the sphere with a diameter of 100 mm, including the parts that maintain connection with the support;
4.2.1.5 Chamfer the exterior surfaces of a height greater than or equal to 1.5 mm and less than or equal to 5 mm; Exterior surfaces with a protruding height greater than 5 mm shall meet the requirements of 4.2.1.2, 4.2.1.3 and 4.2.1.4. The following methods shall be used to determine the dimension of the protrusion.
a) The dimension of the protrusion of part mounted on the protruding surface may be measured directly or determined from drawings of its mounting position.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test methods
6 Installation requirements
7 Installation requirements for CMS
8 Judgment of the same type
9 Transition period for implementation
Annex A (Normative) Test method for determining reflectivity
Annex B (Normative) Procedure for determining the radius of curvature of the reflecting surface of a mirror
Annex C (Normative) Test methods and safety provisions for CMS of Classes I to IV
Annex D (Normative) Calculation of the detection distance for CMS of Class V and VI
Annex E (Normative) Determination of the displayed object size for CMS of Classes V and VI
