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GB/T 39265-2020 English PDF (GBT39265-2020)

GB/T 39265-2020 English PDF (GBT39265-2020)

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GB/T 39265-2020: Road vehicles - Performance requirements and testing methods for blind spot detection (BSD) system

This standard specifies the general requirements, performance requirements and test methods of the blind spot detection (BSD) system. This standard applies to the categories M and N vehicles equipped with blind spot detection systems. This standard does not apply to automobile trains, articulated passenger cars and special operating vehicles.
GB/T 39265-2020
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040
T 41
Road vehicles - Performance requirements and testing
methods for blind spot detection (BSD) system
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: JUNE 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 General requirements ... 7
5 Performance requirements ... 9
6 Test method ... 15
Road vehicles - Performance requirements and testing
methods for blind spot detection (BSD) system
1 Scope
This standard specifies the general requirements, performance requirements and test methods of the blind spot detection (BSD) system.
This standard applies to the categories M and N vehicles equipped with blind spot detection systems.
This standard does not apply to automobile trains, articulated passenger cars and special operating vehicles.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.
GB 4094 Motor vehicles - Symbols for controls, indicators and tell-tales GB 34660 Road vehicles - Requirements and test methods of
electromagnetic compatibility
GB/T 36606-2018 Ergonomics - Motor vehicle driver's eye locations
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Blind spot detection; BSD
Real-time monitoring of the driver?€?s blind area of vision, making prompts or warnings when other road users appear in the blind area.
3.2
4.2 System on and off
The BSD system shall have the function of manual ON or OFF.
When it is manually turned off, the status indication shall be given with an indication signal in accordance with 4.4.2.
4.3 Activation requirements
When the BSD system is turned on and in an inactive state, the system can detect the target vehicle, but shall not warn the driver. When the BSD system is activated, the system can be activated by at least one of the following methods:
a) Start activation: After the vehicle is started, the system automatically starts and enters the activated state;
b) Lowest speed activation: The system will automatically activate when the vehicle speed reaches the minimum activation speed as designed by the
system;
c) Turn signal activation: When the system receives the turn signal sent by the vehicle or determines that it is about to or is in the process of turning, it will automatically activate the system function on the side of the target turning area.
4.4 Human-computer interaction requirements
4.4.1 Warning method
The system shall send out warning messages in a way that is easy to be
perceived by the driver and can clearly indicate the side where the target vehicle appears. The warning indication information shall be clearly distinguished from the warning information of other systems in the vehicle.
4.4.2 On/off indication requirements
The system shall have an indication of the on/off state. The indications shall be visible visually.
4.4.3 System failure indication requirements
The system shall have a system failure indication reminder function. Its reminder status identification shall be clearly observed by the driver. 4.5 Self-check requirements
The system shall have at least the following self-check functions:
- Check whether the relevant electrical components are operating normally; - Check whether the relevant sensing elements are operating normally.
During the self-check, there shall be no obvious delay; in the event of electronic and electrical failures, the failure indication shall not appear obvious delay. 4.6 Others
The signs of the controls, indicators and tell-tales of the blind spot detection system shall meet the relevant requirements of GB 4094.
The effectiveness of the blind spot detection system shall not be adversely affected by electromagnetic fields; its electromagnetic compatibility shall meet the requirements of GB 34660.
5 Performance requirements
5.1 Overview
5.1.1 Blind spot detection range for categories M1, N1 vehicles
The blind spot detection range of categories M1 and N1 vehicles is as shown in Figure 4. The lines in the Figure are intended to more accurately describe the blind spot detection and warning requirements. The right side, left side, rear side, etc., are used to describe the driving direction of the reference subject vehicle. All dimensions as given in the Figure are relative to the subject vehicle; the meaning of each line is as follows:
- Line A is parallel to the rear edge of the subject vehicle and is located 30.0 m behind the rear edge of the subject vehicle;
- Line B is parallel to the rear edge of the subject vehicle and is located 3.0 m behind the rear edge of the subject vehicle;
- Line C is parallel to the front edge of the subject vehicle and is located at the center of the 95th percentile eye ellipse;
- Line D is the two-way extension line of the front edge of the subject vehicle; - Line E is parallel to the centerline of the subject vehicle and is located at the outermost edge of the left side of the subject vehicle body (excluding exterior rearview mirrors);
- Line F is parallel to the centerline of the subject vehicle and is located on the left of the outermost edge of the left side of the subject vehicle body, 0.5 m away from the outermost edge of the left side;
- Line B is parallel to the rear edge of the subject vehicle and is located 3.0 m behind the rear edge of the subject vehicle;
- Line C is parallel to the front edge of the subject vehicle and is located at the position of the rearview mirror;
- Line D is the two-way extension of the front edge of the subject vehicle; - Line E is parallel to the centerline of the subject vehicle and is located at the outermost edge of the left side of the subject vehicle body (excluding exterior rearview mirrors);
- Line F is parallel to the centerline of the subject vehicle and is located on the left of the outermost edge of the left side of the subject vehicle body, 0.5 m away from the outermost edge of the left side;
- Line G is parallel to the center line of the subject vehicle, and is located on the left of the outermost edge of the left side of the subject vehicle body, 3.0 m away from the outermost edge of the left;
- Line H is parallel to the center line of the subject vehicle, and is located on the left of the outermost edge of the left side of the subject vehicle body, 6.0 m away from the outermost edge of the left side;
- Line J is parallel to the centerline of the subject vehicle and is located at the outermost edge of the right side of the subject vehicle body (excluding the exterior rearview mirror);
- Line K is parallel to the centerline of the subject vehicle and is located on the right of the outermost edge of the right side of the subject vehicle body, 0.5 m away from the outermost edge of the right side;
- Line L is parallel to the center line of the subject vehicle and is located on the right of the outermost edge of the right side of the subject vehicle body, 3.0 m away from the outermost edge of the right side;
- Line S is parallel to the centerline of the subject vehicle and is located on the right of the outermost edge of the right side of the subject vehicle body, 4.5 m away from the outermost edge of the right side;
- Line M is parallel to the centerline of the subject vehicle and is located on the right of the outermost edge of the right side of the subject vehicle body, 6.0 m away from the outermost edge of the right side;
- Line N is the two-way extension of the rear edge of the subject vehicle; - Line O is parallel to the rear edge of the subject vehicle and is located 10.0 right sides. The blind spot detection system shall be able to identify ordinary mass-produced motor vehicles and motorcycles under straight-line working conditions. When the target vehicle is a motor vehicle, the wheelbase shall satisfy 2.0 m ~ 2.5 m. As an alternative, the characteristic parameters can also be used to represent the vehicle and adapt to the flexible target of the system sensor. When the target vehicle is a motorcycle, the length of the target vehicle shall be 2.0 m ~ 2.5 m, the width of the widest point (excluding the side-view mirror) shall be 0.7 m ~ 0.9 m, the height (excluding the windshield and the driver) shall be 1.1 m ~ 1.5 m. As an alternative, it can also use the flexible targets whose characteristic parameters can represent the motorcycle and adapt to the system sensors.
Under right turning conditions, the blind spot detection system shall be able to identify ordinary mass-produced bicycles, with a length of (1.8 ?? 0.2) m and a height (including adult cyclists) of (1.7 ?? 0.2) m. As an alternative, it can also use the flexible targets whose characteristic parameters can represent the bicycle and adapt to the system sensors.
5.2.2 Warning requirements for blind spot detection function
5.2.2.1 Left blind zone warning requirements
Carry out a straight-line driving test according to 6.3.2. When the target vehicle is within the range listed in the following conditions (see Figure 4 and Figure 5), the system shall issue a left blind zone warning:
- Any part of the target vehicle is located in front of line B;
- The target vehicle is completely behind the line C;
- The target vehicle is completely on the left side of the line F;
- Any part of the target vehicle is located on the right side of the line G. If no part of the target vehicle is within the coverage area of the four straight lines A, D, E, H, the left blind zone warning shall not be issued.
5.2.2.2 Right blind zone warning requirements
Perform a straight-line driving test according to 6.3.2. When the target vehicle is within the range listed in the following conditions (see Figure 4 and Figure 5), the system shall issue a right blind zone warning:
- Any part of the target vehicle is located in front of line B;
- The target vehicle is completely behind the line C;
- The target vehicle is completely located on the right side of the line K; - Completely independent of the blind spot detection system;
- It can measure the longitudinal distance between the rear edge of the subject vehicle and the front edge of the target vehicle (assuming the target vehicle is located behind the subject vehicle);
- It can measure the longitudinal distance between the front edge of the subject vehicle and the rear edge of the target vehicle (assuming the target vehicle is located in front of the subject vehicle);
- It can measure the lateral distance between the leftmost edge of the subject vehicle and the rightmost edge of the target vehicle (assuming the target vehicle is located on the left side of the subject vehicle);
- It can measure the lateral distance between the rightmost edge of the subject vehicle and the leftmost edge of the target vehicle (assuming the target vehicle is on the right side of the subject vehicle);
- It can measure the time delay from when the target vehicle meets the
warning condition to when the warning is issued.
6.2.2 Accuracy requirements for test measurement system
The test measurement system shall be able to achieve the following accuracy: a) The distance measurement accuracy shall meet the following
requirements:
- When the distance is less than 2 m, the measurement accuracy shall be less than or equal to 0.1 m;
- When the distance is greater than or equal to 2 m and less than or equal to 10 m, the measurement accuracy shall be less than or equal to 5% of
the measured distance;
- When the distance is greater than 10 m, the measurement accuracy shall be less than or equal to 0.5 m.
b) Time measurement accuracy shall meet the following requirements:
- When the time is less than 200 ms, the measurement accuracy shall be
less than or equal to 20 ms;
- When the time is greater than or equal to 200 ms and less than or equal to 1 s, the measurement accuracy shall be less than or equal to 10% of
the measurement time;
- When the time is greater than 1 s, the measurement accuracy shall be

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