GB/T 44156-2024 Performance Requirements and Testing Methods for Rear Cross Traffic Alert System of Passenger Cars
1 Scope
This document specifies the general performance requirements and testing methods for rear cross traffic alert system of passenger cars.
This document applies to vehicles of category M1 equipped with rear cross traffic alert system.
Note: The "rear cross traffic alert system" in this document is abbreviated as "RCTA system" under the premise of no confusion.
2 Normative references
The contents of the following documents constitute an essential clause of this document through normative references in the text. Among them, for dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
GB 34660 Road Vehicles - Requirements and Test Methods of Electromagnetic Compatibility
GB/T 39263 Road Vehicles - Advanced Driver Assistance Systems - Terms and Definitions
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 39263 and following apply.
3.1
rear cross traffic alert system
system that monitors other road users approaching laterally behind the vehicle in a real-time manner and provides the warning in case of potential risk of collision while reversing
3.2
subject vehicle
tested vehicle equipped with RCTA system and testing equipment
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3.4.1
target vehicle
vehicle approaching laterally behind the subject vehicle
3.4.2
target bicycle
bicycle approaching laterally behind the subject vehicle
3.4.3
target pedestrian
pedestrian approaching laterally behind the subject vehicle
3.5
blocking vehicle
vehicle parked parallel to the subject vehicle in adjacent parking space
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3.6
lateral distance
in the coordinate system of the subject vehicle, the projection distance between the lateral outermost edge of the subject vehicle near the target (excluding the rearview mirror) and the front outermost
edge of the target (or the centroid of the pedestrian when the target is a pedestrian) perpendicular to the driving direction of the subject vehicle
Note: The lateral distance between target and subject vehicle is shown in Figure 1.
3.7
time to collision (TTC)
ratio of the lateral distance to the relative speed projected on the lateral distance at the same time
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Functional requirements
4.2 Self-check requirements
4.3 Status indication requirements
4.4 Electromagnetic compatibility requirements
5 Performance requirements
5.1 Requirements for collision warning
5.2 Requirements for collision warning conditions
6 Testing methods
6.1 Testing conditions
6.2 Testing equipment
6.3 Measurement system
6.4 Vehicle cross test
6.5 Bicycle cross test
6.6 Pedestrian cross test
