GB/T 44174-2024 Performance requirements and testing methods for night vision system of passenger cars
1 Scope
This document specifies the performance requirements and testing methods for night vision system of passenger cars.
This document is applicable to M1 vehicles with night vision system.
2 Normative references
The following documents contain requirements 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 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 purposes of this document, the terms and definitions given in GB/T 39263 and the following apply.
3.1
night vision system
system that provides visual aids or warning messages to the driver at night or in other low-light driving environments
3.2
subject vehicle
vehicle under test equipped with a night vision system and testing equipment
3.3
target
pedestrians within the detection range of the night vision system
3.4
longitudinal distance
projected distance between the outermost edge of the front end of the subject vehicle and the target center of mass in the traveling direction of the subject vehicle under the coordinate system of the subject vehicle
3.5
time to collision; TTC
ratio of the longitudinal distance to the relative velocity on the longitudinal distance projection at the same time
3.6
self-check
function of the system to check its own faults
4 General requirements
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Functional requirements
4.2 Self-check requirements
4.3 System status alert requirements
4.4 Electromagnetic compatibility requirements
5 Performance requirements
5.1 Image display latency requirements
5.2 Image display quality requirements
5.3 Target marking requirements
5.4 Longitudinal collision alert requirements
6 Testing methods
6.1 Testing environment requirements
6.2 Testing equipment requirements
6.3 Measurement system requirements
6.4 Image display latency test
6.5 Image display quality and target marking tests
6.6 Collision alert test
Annex A (Informative) Image quality evaluation
A.1 Image quality evaluation grading
A.2 Conclusion of image quality evaluation
