GB/T 37471-2019 PDF English
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Intelligent transportation systems - Lane change decision aid systems - Performance requirements and test procedures
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GB/T 37471-2019: Intelligent transportation systems - Lane change decision aid 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/GBT37471-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 03.220.20; 35.240.60
R 87
Intelligent transportation systems - Lane change
decision aid systems - Performance requirements and
test procedures
[ISO 17387.2008, Intelligent transport systems - Lane change decision aid
systems (LCDAS) - Performance requirements and test procedures, NEQ]
Issued on. MAY 10, 2019
Implemented on. DECEMBER 01, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
Introduction... 4
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 System classification... 10
5 Functional and performance requirements... 14
6 Test requirements... 23
Appendix A (Informative) Example of blind spot warning... 44
References... 59
1 Scope
This standard specifies the classification, function and performance
requirements and test requirements of the lane change decision aid system
(LCDAS).
This standard applies to the lane change decision aid system installed in
category M (including category M1, M2, M3) and N (including category N1, N2,
N3) vehicles under forward driving conditions. It is not applicable to the similar
systems installed in category O (including category O1, O2, O3, O4) and L
(including category L1, L2, L3, L4, L5) 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) are applicable to this standard.
GB 7258-2012 Safety specifications for power-driven vehicles operating on
roads
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Subject vehicle
A vehicle equipped with a lane change decision aid system.
3.2
Target vehicle
All vehicles closing the subject vehicle from behind or in the adjacent zones
of the subject vehicle.
3.3
Coverage zones
The entire zone that can be monitored by the lane change decision aid
system; the target vehicle in the coverage zone can be detected by the
system.
Note. The coverage zone includes the left adjacent zone, the right adjacent
zone, the left rear zone, the right rear zone. The location description of
warning requirements is as shown in Figure 10.
3.4
Adjacent zones
The area located on the left and right sides of the subject vehicle, as shown
in Figure 2.
4 System classification
4.1 Classification by coverage zone
4.1.1 Classification basis
LCDAS is classified according to the minimum limit of the required coverage
range, as shown in Table 1.
4.1.2 Type I system
Type I system only provides blind spot warning function. This type of system
reminds the driver to pay attention to the target vehicle in the adjacent zone.
Such systems do not require warnings for target vehicles closing the target
vehicle from the rear zone.
4.1.4 Type III system
Type III system provides blind spot warning function and closing vehicle
warning function. The purpose of this type of system is to remind the driver to
pay attention to the target vehicle in the adjacent zone and the target vehicle
closing the vehicle from behind.
4.2 Classification by the closing speed of the target vehicle
4.2.1 Classification basis
Type II and Type III LCDAS are classified by the maximum closing speed and
minimum curve radius of the target vehicle, as shown in Table 2.
4.2.3 Category B system
For a given category B system, the minimum performance range required by
the radius of the curve and the closing speed of the target vehicle is as shown
in Figure 8.This type of system has the ability to work on smaller curve radius
conditions.
For a given category C system, the minimum performance range required by
the radius of the curve and the closing speed of the target vehicle is as shown
in Figure 9.This type of system has the ability to work on smaller curve radius
conditions.
4.3 Other requirements
The following content shall be declared in the accompanying document.
5 Functional and performance requirements
5.1 LCDAS functional requirements
5.1.1 Inactive working state and basic functions
LCDAS will not provide any warning to the driver when it is inactive. The system
in the inactive state can enter the standby mode. At this time, the system can
still monitor the target vehicle. Because it is in the inactive state, it will not
provide any warning to the driver. The system in the inactive state can also be
turned off directly without entering the standby mode.
5.1.3 Active working state and basic functions
5.1.3.1 No-warning state
The non-warning state means that the system is working; the system shall be
able to automatically detect the target vehicle; meanwhile the warning
conditions are not met.
5.1.3.2 Warning state
The warning state is that the system is working; the system shall be able to
automatically detect the target vehicle and meet the warning conditions.
5.2 Performance requirements
5.2.1 Location description of warning requirements
In order to describe the blind spot warning requirements and closing vehicle
warning requirements, it respectively defines several straight-lines, left adjacent
zone, right adjacent zone, left rear zone, right rear zone. The lane markings in
the Figure are for reference only for illustration, as shown in Figure 10.
Description.
5.2.3.2 Suppression of blind spot warning
In the case of the subject vehicle overtaking the target vehicle, if the target
vehicle enters the adjacent zone from the front of the subject vehicle at this time,
the blind spot warning can have a warning suppression for up to 2 s after the
warning condition is met for the first time; during the warning suppression period,
it does not provide the blind spot warning as caused by this target vehicle to the
driver. This function is optional.
5.2.4 Requirements for closing vehicle warning function
5.2.6 System response time
The response time of the entire system, from the time the target meets the
warning requirements to the effective warning indication, shall not exceed 300
ms.
5.3 User interface
5.3.2 LCDAS active state indication
The LCDAS active state indicator can be used to tell the driver of the subject
vehicle that LCDAS is in working state (see 5.1). If the driver can activate or
deactivate the system manually, the system shall contain both the system
inactive state indicator and the active state indicator. The device that activates
the system is a switch, so that the driver can activate or deactivate the system
manually.
5.3.4 LCDAS fault indication
When LCDAS detects a system fault through the self-check function (see 5.4),
the system shall notify the driver through the fault indication function.
The LCDAS fault indication shall clearly indicate the failure of the driver's
system by means of vision, hearing or a combination of vision and hearing.
5.4 Self-check requirements of subject vehicle
After the system is activated, the system shall at least provide the following self-
check functions.
6 Test requirements
6.1 Requirements for target vehicles for testing
For the test in this standard, the target vehicle used for the test shall be a
manned motorcycle. The target vehicle shall meet the following size
requirements.
6.2 Environmental requirements
The environmental requirements are as follows.
6.3 Requirements for blind spot warning test
6.3.1 Blind spot warning test system
6.3.1.1 The test system meets the following conditions.
6.3.1.2 For all test processes, the test measurement system has the following
accuracy.
6.3.2.3 False warning test
The purpose of this test is to detect that the blind spot warning system does not
issue a warning when the test target vehicle is in a lane outside the adjacent
lane.
6.3.2.4 Lateral movement of target vehicle
For the false warning test of the target vehicle's lateral movement, the definition
of the straight-line is as shown in Figure 13 and 5.2.1.The test provisions and
test requirements are as follows.
6.4 Requirements for closing vehicle warning test
6.4.1 Closing vehicle warning test system
6.4.1.1 The test system shall meet the following conditions.
6.5.2.2 Subject vehicle overtaking target vehicle
The purpose of this test is to detect when the subject vehicle overtakes the
target vehicle, the lane change warning system gives the required warning. This
test shall be carried out in accordance with 6.3.2.2.
6.5.2.3 False warning test
The purpose of this test is to detect when the target vehicle is located in a lane
outside the adjacent lane, the closing vehicle warning system does not give any
warning.
6.5.2.4 Lateral movement of target vehicle
The purpose of this detection is to detect that when the target vehicle moves
laterally near the subject vehicle, the lane change warning system gives the
required warning. The definition of the straight-line is as shown in Figure 17 and
5.2.1.The test shall be carried out as follows.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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