GB/T 33577-2017 PDF English
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Intelligent transportation systems -- Forward vehicle collision warning systems -- Performance requirements and test procedures
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GB/T 33577-2017: Intelligent transportation systems -- Forward vehicle collision warning systems -- Performance requirements and test procedures
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT33577-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 03.220.20;43.040.20
R 87
Intelligent transportation systems - Forward vehicle collision
warning systems - Performance requirements and test
procedures
(ISO 15623.2013, Transport information and control systems - Forward vehicle
collision warning systems - Performance requirements and test procedures,
NEQ)
Issued on. MAY 12, 2017
Implemented on. DECEMBER 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
FOREWORD... 3
INTRODUCTION... 4
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Functions and requirements... 10
5 Performance test method... 21
Appendix A (Normative) Basic consideration of collision warning... 30
Appendix B (Normative) Obstacle detection range requirements along curves... 36
Appendix C (Normative) Sensor performance requirements and test target requirements
... 38
References... 40
1 Scope
This Standard specifies performance requirements and test procedures for forward
vehicle collision warning systems (hereinafter referred to as FVCWS).
This Standard covers operations on roads with radius of curvature over 125 m, and
motor vehicle including cars, trucks, buses and motorcycles.
Note. Responsibility for the safe operation of the vehicle remains with the driver.
2 Normative references
The following referenced documents are indispensable for the application 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 7247.1-2012, Safety of laser products - Part 1.Equipment classification and
requirements
GB/T 20608-2006, Intelligent transportation systems - Adaptive cruise control
systems - Performance requirements and test procedures
JTG B01-2014, Technical Standard of Highway Engineering
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 collision warning
Information that the system gives to the driver indicating the need for urgent action to
avoid a collision.
3.2 preliminary collision warning
Warning information that the system gives to the driver of an obstacle vehicle ahead.
3.3
subject vehicle; SV
Vehicle equipped with forward vehicle collision warning system as defined herein.
3.4
forward vehicle
Vehicle in front of and moving in the same direction and traveling on the same roadway
as the subject vehicle.
3.5
forward vehicle collision warning system
System capable of warning the driver of a potential rear-end collision with the forward
vehicle.
3.6
obstacle vehicle
Vehicles, both moving and stationary, considered potential hazards that can be detected
by the system.
4 Functions and requirements
4.1 System functionality
The main functionality of the forward vehicle collision warning system is to issue a
warning to the driver when there is a potential conflict between the subject vehicle and
the forward vehicle. The system functionality is realized by judging the following
information.
4.2 Necessary functionalities
Vehicle equipped with a forward vehicle collision warning system shall be equipped to
fulfill the following functionalities.
4.3 Operating model
4.3.3 Operational limits
The value of the minimum velocity Vmin shall be at most 11.2 m/s when the system
works. The value of the maximum velocity Vmax shall be at least 27.8 m/s or the
maximum vehicle operating velocity when the system works. The minimum value of
the relative velocity shall not be higher than 4.2 m/s, and the maximum value shall not
be lower than 20 m/s.
4.4 Warning functionality
4.4.1 Warning target object
Forward vehicle collision warning systems shall provide warnings for moving
(including “has been detected as moving by the sensor and now stopped”) obstacle
vehicles. Providing warnings for stationary obstacle vehicles is optional.
4.4.2 Monitoring distance and relative velocity between obstacle vehicle and
subject vehicle
4.4.3 Judging the time to collision
One possible way to judge the time to collision is by the results of evaluating the subject
vehicle velocity, the distance to the obstacle vehicle, and the relative velocity. When the
system detects multiple obstacle vehicles at the same time, it shall select one in the
subject vehicle expected trajectory that the subject vehicle may collide with first.
4.4.4 Preliminary collision warning and collision warning
Forward vehicle collision warning systems shall provide two different warnings.
preliminary collision warning and collision warning.
4.4.5 Fault indication
The driver shall be informed when a malfunction is detected during system startup or
operation.
4.5 Requirements for warning factors
4.5.1 System output
The forward vehicle collision warning system shall be able to issue a collision warning
to the driver, as well as a preliminary collision warning.
4.5.2 Warning modality
FVCWS warning modalities shall meet the following requirements.
4.5.3 Required deceleration threshold
The required deceleration thresholds involved in the forward vehicle collision warning
system shall meet the following requirements.
4.5.4 Response time
The value of the response time involved in the forward vehicle collision warning system
shall meet the following requirements.
4.5.5 No Warning requirements
The FVCWS warning shall be suppressed or delayed under the following conditions.
4.8 FVCWS performance on curves
The forward vehicle collision warning system belonging to Class I system shall be able
to issue a warning on the obstacle vehicles on the curve with a radius greater than or
equal to 500 m; the forward vehicle collision warning system belonging to Class II
system shall be able to issue a warning on the obstacle vehicles on the curve with a
radius greater than or equal to 250 m; the forward vehicle collision warning system
belonging to Class III system shall be able to issue a warning on the obstacle vehicles
on the curve with a radius greater than or equal to 125 m.
4.9 User safety requirements
Different safety requirements shall be met according to the type of sensor used by the
system, see Appendix C.
4.10 User interface requirements
4.10.1 Warning modality
Among the warning modalities, the warning characteristics of the visual and auditory
modalities are shown in Table 4.
4.10.2 Interference with other warnings
Even when a vehicle is equipped with a forward vehicle collision warning system along
with other warning systems such as those for rear or side obstacles, the warning shall
be clearly distinguishable to the driver relative to other unrelated warnings.
4.10.3 Operational state display
4.11 Awareness of system limitations
The driver shall be informed of system limitations by appropriate means such as the
owner's manual or warning labels.
Head-on collision warning, crossing-patch collision warning, operations beyond the
sensor limit (including short radius curve, etc.) and the maximum velocity beyond the
system are not available within this system.
5 Performance test method
5.1 Test target specification
Test targets that meet different requirements shall be selected according to the sensor
type, see Appendix C.
5.2 Environmental conditions
The test environment shall meet the following requirements.
5.3 Test method for detection area
The most realistic test method for detection area is a dynamic test; however, a static test
is available as an option also. The test shall be performed as follows.
5.4 Test method for warning distance range and accuracy
5.4.1 Warning distance range test
The target vehicle and the subject vehicle are moving on the same lane on a straight
road. The target vehicle is moving at a velocity (8±1) m/s; the subject vehicle is moving
at a velocity (20±2) m/s. The warning distance shall be greater than or equal to that
calculated in 4.5.6.
5.4.2 Warning distance accuracy test
The test shall be done with vehicles in motion. The target vehicle shall be in the
detection area. While the subject vehicle is driving towards the target vehicle at the
velocity V = 20 m/s, the warning distance shall be measured by following procedure.
Two timings shall be measured.
5.5 Test method for target discrimination ability
5.5.1 General
The test shall be done with vehicles in motion. The test shall be finished when the
subject vehicle has produced a warning. The test shall also show the ability of the
system to avoid false warnings.
5.5.2 Longitudinal target discrimination ability
5.5.2.1 Discrimination ability under longitudinal single target condition
5.4.4 Nearby interfering substance discrimination ability
5.5.4.1 Overhead target discrimination ability
The test shall be performed dynamically. As test conditions shown in Figure 12, install
the test target which may cause false warnings. The subject vehicle approaches the test
target, and passes under it. The test is finished when the subject vehicle has not
produced a warning. According to the regulations on road clearance height in 2.0.7 of
JTG B01-2014, the height of the test target is designed as the clearance height of 4.5 m
for the Class-IV highway.
5.5.4.3 Roadside target discrimination ability
The test shall be performed dynamically. Set up a test road section, where there are
roadside targets on both sides of the road, such as houses, shadow areas, and road signs,
which may cause false warning of the system. The subject vehicle drives through the
road section at a constant velocity within the working range of the system. If the system
on the subject vehicle does not issue a warning, the test ends.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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