GB/T 44173-2024 English PDF (GBT44173-2024)

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GB/T 44173-2024: Performance requirements and testing methods for door open warning system of passenger cars
GB/T 44173-2024
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Performance requirements and testing methods for door
open warning system of passenger cars
ISSUED ON: JULY 24, 2024
IMPLEMENTED ON: JULY 24, 2024
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 ... 6
4.1 Functionality ... 6
4.2 Self-check ... 6
4.3 DOWS status prompt ... 7
4.4 Warning messages ... 7
4.5 Fault response ... 7
4.6 Electromagnetic compatibility ... 7
5 Performance requirements ... 7
5.1 Left side alarm ... 7
5.2 Right side alarm ... 8
5.3 Delayed shutdown ... 9
6 Test methods ... 9
6.1 DOWS settings of the subject vehicle ... 9
6.2 Test equipment ... 9
6.3 Test environment ... 10
6.4 DOWS alarm boundary test ... 10
6.5 Test of a target straight-line overtaking the subject vehicle ... 12
6.6 Test of a target changing lane and overtaking the subject vehicle ... 12
6.7 DOWS delayed shutdown test ... 14
Performance requirements and testing methods for door
open warning system of passenger cars
1 Scope
This document specifies the general and performance requirements for door open
warning systems of passenger cars and describes the test methods.
This document applies to M1 vehicles equipped with a door open warning system.
2 Normative references
The provisions of the following documents constitute the essential clauses of this
document through normative references in this text. Among them, for referenced
documents with dates, only the versions corresponding to the dates are applicable to
this document; for referenced documents without dates, the latest versions (including
all amendments) are applicable to this document.
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
The terms and definitions defined in GB/T 39263 and the following apply to this
document.
3.1 door open warning system; DOWS
When the vehicle is parked and a door is about to be opened, the system that monitors
other road users to the side and rear of the vehicle and issues a warning message if there
is a risk of collision due to the door being opened.
3.2 subject vehicle
The passenger car under test, which is equipped with a door open warning system (3.1)
and test equipment.
functions:
a) Check whether the relevant electrical components are operating normally;
b) Check whether the relevant sensor components are operating normally.
4.3 DOWS status prompt
For DOWS that can be actively opened and closed by the driver, an optical prompt
message shall be issued when the driver actively closes the DOWS.
4.4 Warning messages
When DOWS detects that the vehicle door is open and there is a risk of collision with
a target, it shall issue a warning message in a way that is easily perceived by the driver
and passengers. The warning message:
a) shall be issued by at least one of the optical, acoustic and tactile methods, and
clearly indicate that the target is on the left or right side of the subject vehicle;
b) shall be clearly distinguished from other DOWS prompts.
4.5 Fault response
If a fault occurs during DOWS self-check and operation, DOWS shall issue a fault
indication message. The fault indication message shall be in at least one of the optical,
acoustic and tactile ways, and shall be clearly distinguished from the DOWS warning
message and other fault indication messages of the vehicle.
4.6 Electromagnetic compatibility
DOWS electromagnetic compatibility shall comply with the requirements of GB 34660.
5 Performance requirements
5.1 Left side alarm
As shown in Figure 3, the test is carried out according to 6.4, 6.5 and 6.6. When all the
following conditions are met, the DOWS shall continuously issue the left warning
message. The TTC when the warning message is issued shall not be less than 1.5
seconds. The warning message shall meet the requirements of 4.4:
Line C -- parallel to the center line of the subject vehicle and located at the outermost edge of the left
side of the subject vehicle body (excluding the exterior rear-view mirror);
Line D -- parallel to the center line of the subject vehicle and located at the outermost edge of the right
side of the subject vehicle body (excluding the exterior rear-view mirror);
Line E -- parallel to the center line of the subject vehicle and located to the right of the rightmost edge of
the subject vehicle body and 1.5 m away from the rightmost edge of the subject vehicle body
(excluding the exterior rear-view mirror).
Figure 3 -- Alarm reference line schematic diagram
5.3 Delayed shutdown
When tested according to 6.7, DOWS shall meet the following requirements:
a) For subject vehicles equipped with a power-off switch, the DOWS shall
continue to work for at least 3 minutes after power-off and issue a warning
message when the alarm conditions are met;
b) For subject vehicles without a power-off switch, the DOWS shall continue to
work for at least 3 minutes when stationary and issue a warning message when
the alarm conditions are met.
6 Test methods
6.1 DOWS settings of the subject vehicle
For DOWS with adjustable alarm thresholds, the test shall be conducted at the DOWS
latest alarm threshold setting. The DOWS setting shall not be changed after the test
begins.
6.2 Test equipment
6.2.1 The test equipment shall be completely independent of the subject vehicle. The
accuracy of the test equipment shall meet the following requirements:
a) The distance measurement accuracy is at least 0.05 m;
b) The time measurement accuracy is at least 30 ms;
c) The speed measurement accuracy is at least 0.1 km/h.
6.2.2 The test targets shall meet the following requirements:
a) A common mass-produced M1 vehicle or a flexible target whose
characterization parameters can represent an M1 vehicle shall be selected as
the target vehicle;
b) A common mass-produced bicycle or a flexible target whose characterization
parameters can represent a bicycle shall be selected as the target bicycle. The
length of the bicycle is (1.8±0.2) m, the width (including an adult rider) is
(0.5±0.2) m, and the height (including an adult rider) is (1.7±0.2) m.
NOTE: Flexible target refers to a target that can reduce the collision damage of the subject vehicle during
the test.
6.3 Test environment
The test environment shall meet the following requirements:
a) The light intensity is not less than 500 lx;
b) The temperature range is -20 ℃~+45 ℃;
c) The horizontal visibility is greater than 1 km.
6.4 DOWS alarm boundary test
As shown in Figure 4, the target overtakes the stationary subject vehicle in a straight
line at the speed and lateral distance shown in Table 1, parallel to the subject vehicle.
When the target enters the adjacent area of the subject vehicle with a longitudinal
distance being the corresponding value in Table 1, and the test side door of the subject
vehicle is opened and stationary with an angle between the door and the body being as
small as possible, the test begins. When the target overtakes line A of the subject vehicle
(3±0.5) m, the test ends. The test includes the following:
a) Test al...