GB/T 44599-2024 in English

《GB/T 44599-2024天线测量场地检测方法》由TC485（全国通信标准化技术委员会）归口，主管部门为工业和信息化部（通信）。

GB/T 44599-2024 Road illumination devices and systems for motor vehicles

1 Scope

This document specifies the judgment of the same type, general requirements, light source requirements, light color requirements, light distribution performance, light distribution stability, test methods and inspection rules of road illumination devices and systems for motor vehicles.

This document is applicable to the design, manufacture and acceptance of road illumination devices and systems, such as low beam, high beam, front fog lamp and corner lamps, etc. used for M-class and N-class motor vehicles.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions 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 4785 Prescription for installation of the external lighting and light-signalling devices for motor vehicles and their trailers
GB/T 43081-2023 Lamps and light sources for road vehicles - Dimensional, electrical and luminous requirements
IEC 60825-1:2014 Safety of laser products - Part 1 : Equipment classification and requirements
Note: GB 7247. 1-2012 Safety of laser products - Part 1: Equipment classification and requirements (IEC 60825-1:2007, IDT)
IEC 62471-7:2023 Photobiological safety of lamps and lamp systems - Part 7 : Light sources and luminaires primarily emitting visible radiation UN R37 Uniform provisions concerning the approval of filament lamps for use in approved lamp units of power-driven vehicles and of their trailers (UN)
UN R37 Uniform provisions concerning the approval of gas-discharge light sources for use in approved gas-discharge lamp units of power-driven vehicles (UN)
UN R99 Uniform provisions concerning the approval of gas-discharge light sources for use in approved gas- discharge lamp units of power-driven vehicles (UN)
UN R128 Uniform provisions concerning the approval of light emitting diode (LED) light sources for use in approved lamp units on power- driven vehicles and their trailers (UN)
R.E.5 Consolidated Resolution on the common specification of light source categories (UN)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB 4785 and the following apply.

3.1
road illumination device
unit or unit group used to illuminate the road and objects in the heading direction of motor vehicle and realize one or more functions

Note: The abbreviation of "device" in this document, including one or more functions of headlamp (low beam and high beam), front fog lamp and corner lamp.

3.2
road illumination system
system consisting of left and right units or unit groups and a controller, used to illuminate roads and objects in the direction of vehicle heading

Note: It is referred to as "system" in this document.

3.3
lighting unit
lamp emitting part of the system, which provides beams of one or more road-lighting function(s) provided by the system

Note: It consists of optical, mechanical and electrical parts.

3.4
installation unit
a nondetachable housing (lamp body) containing one or several lighting units

3.5
neutral status
in-service status of the system without any adaptive control signal input

3.6
basic passing beam
low beam function in neutral status

3.7
beam type
different beam types provided by the low beam function and the high beam function of the same device or system

Example: basic low beam and adaptive low beam.

3.8
adaptive function
function that the device or system can automatically provide functions of different characteristic beams under different use conditions

3.9
steady state of light intensity
steady state after the change of luminous intensity of the test point is less than 3% within any 15 min or less than 1% within any 5min minutes.

Note: light intensity in this document is referred to as "intensity" for short.

3.10
driver assistance projection function
projection function by adjusting the light distribution to assist the driver in aided driving

Example: road slip warning projection function, lane keeping assist signal projection function, rear-end collision warning signal projection function, etc.

4 Judgment of the same type

Devices that do not differ in the following main features are regarded as the same type:

- Manufacturer;

- The number, type, luminous principle and light source module structure of replaceable or non-replaceable light sources used;

- The number and structure of major optical elements (such as mirrors, lenses, light pipes, etc.);

- Material of external lens and coating.

5 Overall requirements

5.1 Beam adjusting device

5.1.1 Low beam, high beam and front fog lamp devices shall have beam adjusting devices. When any function of low beam, high beam and front fog lamps are combined to produce a combined lamp, the adjusting device shall be able to adjust them separately; if they can't be adjusted independently due to the common adjusting mechanism or the integral reflector, it shall be ensured that the high beam shall not be adjusted after the low beam is adjusted.

Since it cannot be adjusted independently, it shall be ensured that the high beam shall not be adjusted after the low beam is adjusted.

5.1.2 If the adjustment in 5.1.1 can be realized by other means on the vehicle, the device may not be installed.

5.2 Beam switch device

Devices used to switch beams in devices or systems shall meet the following requirements:

a) The shape and position of the movable part(s) of the beam switching device cannot be changed by using common tools;

b) When switching between the low beam and the high beam using mechanical device, the switching shall be doable at any time, and the mechanical device will not stop in the middle or other uncertain positions.

5.3 Marking of device or system

5.3.1 The lamp body of the device or system shall be marked with the rated voltage. Devices or systems that are only applicable to 12 V rated voltage systems or only to 24 V rated voltage systems shall comply with the provisions on voltage marking in Annex A.

5.3.2 For paired devices, marking indicating that they are installed on the left and right sides of the vehicle shall be provided on the lamp body on each side.

5.4 Marking of reference center

The reference center shall be marked for devices or systems, and the marking method shall conform to Annex A. If two high beam headlamps are installed on each side of the vehicle, they shall be marked separately.

5.5 Requirements of driver assistance projection function

5.5.1 The applicant or manufacturer shall provide a list of driver assistance projection functions, which shall not make other road users uncomfortable, dazzle or distracted.

5.5.2 Only the following functions are allowed to use driver assistance projection functions:

- low beam (shall meet the requirements of 8.2.9);

- high beam (shall meet the requirements of 8.3.6).

5.5.3 The light color of the logo or pattern of the assistance projection function shall be white.

5.5.4 For the logo or pattern of assistance projection function used in roads, the horizontal distance from their outer edge to the track of the vehicle's center of gravity shall not exceed 1875 mm. The applicant or manufacturer shall prove it by calculation or a method recognized by the certification body.

5.5.5 The logo or pattern of assistance projection function is allowed to blink when emergency danger signals (such as rear-end collision warning signal, emergency braking signal, danger warning signal, etc.) are working, and its blinking frequency shall be 4.0 Hz ± 1.0 Hz in this case.

6 Requirements of light source

6.1 Replaceable light source

6.1.1 For the replaceable filament light source, it shall be able to be installed in the correct position of the lamp in the dark without using tools.