GB 39732-2020 PDF English
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GB 39732-2020: Vehicle event data recorder system---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/GB39732-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
Vehicle event data recorder system
Issued on. DECEMBER 24, 2020
Implemented on. JANUARY 01, 2022
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... 5
4 Technical requirements... 9
5 Test methods and requirements... 23
6 Appearance and marking... 27
7 Extension of vehicle models... 27
8 Instruction manual... 28
9 Implementation of standard... 29
Appendix A (Normative) Data element format... 30
Appendix B (Normative) Arrangement of data elements... 34
Appendix C (Normative) Determination of compliance of delta-V curve... 48
Appendix D (Normative) Shock waveform of bench test... 50
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by AND shall be under the jurisdiction of the Ministry of
Industry and Information Technology of the People's Republic of China.
Vehicle event data recorder system
1 Scope
This standard specifies the terms and definitions, technical requirements, test methods
and requirements, appearance and marking, vehicle type extensions and instructions,
for the vehicle event data recorder system of category M1 vehicles.
This standard applies to category M1 vehicles, which are equipped with a vehicle event
data recorder system. Other vehicles can make reference with it.
2 Normative references
The following documents are essential for the application of this document. For dated
references, only the dated version applies to this document. For undated references, the
latest edition (including all amendments) applies to this document.
GB 11551-2014 The protection of the occupants in the event of a frontal impact for
motor vehicle
GB 14166 Safety-belts, restraint systems, child restraint systems and ISOFIX child
restraint systems for occupants of power-driven vehicles
GB 20071 The protection of the occupants in the event of a lateral impact
GB/T 20913 The protection of the occupants in the event of an off-set frontal impact
for passenger car
GB/T 30038 Road vehicles - Degrees of protection (IP-Code) - Protection of
electrical equipment against foreign objects, water and access
GB/T 34589-2017 Road vehicles - Diagnostic connector
ISO 14229-1.2020 Road vehicles - Unified diagnostic services (UDS) - Part 1.
Application layer
ISO 14230-1 Road vehicles - Diagnostic communication over K-Line (DoK-Line) -
Part 1.Physical layer
ISO 14230-2 Road vehicles - Diagnostic communication over K-Line (DoK-Line) -
Part 2.Datalink layer
ISO 14230-3.1999 Road vehicles - Diagnostic systems - Keyword Protocol 2000 -
Part 3.Application layer
ISO15765-2.2016 Road vehicles - Diagnostic communication over Controller Area
Network (DoCAN) - Part 2.Transport protocol and network layer services
3 Terms and definitions
The terms and definitions, as defined in GB 14166, as well as the following terms and
definitions, apply to this document.
3.1 Impact event
A impact or other physical event, that reaches or exceeds the trigger threshold, OR
any other event, that causes an irreversible restraint to deploy, whichever occurs first.
3.2 Vehicle event data recorder system; EDR
A device or system, which is composed of one or more on-board electronic modules;
has the function of monitoring, collecting, recording the data of the vehicle and
occupant protection system before, during, after the occurrence of an impact event.
3.3 EDR controller
In-vehicle electronic module, for monitoring, collecting, recording time-series data,
during an impact event.
3.4 Lateral acceleration
The component of the acceleration vector, at a point on the vehicle, in the direction
of the Y axis.
3.5 Longitudinal acceleration
The component of the acceleration vector, at a point on the vehicle, in the direction
of the X axis.
3.6 Normal acceleration
The component of the acceleration vector at a point on the vehicle in the direction
of the Z axis.
4 Technical requirements
4.1 Requirements for impact event
4.1.1 Trigger threshold
4.1.2 Lockout conditions
4.1.3 Starting point of impact event
The starting point of the impact event (time zero T0) shall meet any of the following
requirements, as shown in Figure 2.
4.1.4 End of impact event
The end of the impact event (T end) shall meet the following requirements.
4.1.5 Duration of impact event
The duration of impact event is the time interval, between the impact event's start point
(T0) and the end point of impact event (T end).
4.2 Data recording requirements
4.2.1 The data elements of EDR records are divided into two levels, according to the
following requirements.
4.2.2 In the event of an impact, the data elements recorded by the EDR shall meet the
requirements of Appendix A, meanwhile the data recorded by the EDR shall meet the
test requirements of 5.1, 5.2, 5.3.
4.3 EDR recording functional requirements
4.3.1 Storage media requirements
EDR data shall be recorded in non-volatile memory.
4.3.2 EDR trigger requirements
When the vehicle reaches the trigger threshold, which is specified in 4.1.1, the EDR
controller shall trigger the recording of data; after the test according to 5.3.2, it shall
meet the test requirements.
4.3.3 Requirements for the number of storage events
The EDR system shall be able to record at least three consecutive impact event data.
After the test according to 5.3.3, it shall meet the test requirements.
4.3.4 Requirements for storage overwriting mechanism
4.3.5 Requirements for power-off storage
In the process of impact, if the power supply circuit in the vehicle cannot supply power
normally, due to the impact event, then the EDR system itself shall have the power
supply capability.
4.4 Data extraction requirements
4.4.1 General requirements
After the event occurs, the data recorded by the EDR shall be able to be extracted, AND
the data shall be prevented from being tampered with or deleted.
4.4.2 Requirements for data extraction port
The EDR data extraction port shall comply with the port definition, in 4.2.1 of GB/T
34589-2017.The terminal arrangement is as shown in Table 4.
4.4.3 Requirements for data extraction protocol
4.4.4 Requirements for data extraction symbol
4.4.5 Requirements for data translation
The data recorded by the EDR shall meet the requirements of Table A.1 in Appendix A.
It shall be translated, in accordance with the data arrangement in Table B.1.
4.4.6 Requirements for storage period
If the EDR storage unit is not replaced, the event data stored by the EDR system shall
be available for reading, throughout the vehicle's life cycle.
4.4.7 Additional data extraction requirements
If the EDR data is scattered in different on-board electronic modules, then the recorded
data shall ensure time synchronization.
4.5 Requirements for protective performance
The protection performance of the EDR controller, which records the EDR data, shall
meet the functional status requirements, which are specified in GB/T 30038, as shown
in Table 10.
5 Test methods and requirements
5.1 Impact test
5.1.1 Before the test, the longitudinal or lateral acceleration sensor of the laboratory
shall be installed, in or near the longitudinal center plane of the vehicle. If the EDR
controller, where the vehicle acceleration sensor is located, is in the longitudinal center
plane of the vehicle, THEN, the laboratory acceleration sensor shall be installed on or
near the surface of the EDR controller; the distance between the laboratory acceleration
sensor and the surface of the EDR controller shall be less than 30 mm.
5.1.2 Vehicles, which are equipped with frontal airbags, shall be tested, in accordance
with GB 11551-2014 or GB/T 20913.It shall record the deployment time of the
irreversible restraint device, which are equipped on the vehicle.
5.1.3 Vehicles, which are equipped with side airbags or side curtains, shall be tested in
accordance with GB 20071.The deployment time of the irreversible restraint device,
which are equipped on the vehicle, shall be recorded.
5.2 Driving operation data test
5.2.1 During the test, when the vehicle engine is running (the pure electric vehicle and
hybrid electric vehicle are powered on), the electronic and electrical systems of the
vehicle, which are recorded by the EDR, shall be set and kept in the ON state. The
relevant components shall be set at least as follows.
5.2.2 The following, but not limited to, four methods shall be used to trigger the impact
threshold.
5.2.3 The EDR system shall be triggered and record data. The data shall meet the
recording requirements of 4.2.At the same time, the recording of relevant data shall be
consistent with the vehicle setting status in 5.2.1.
5.3 Bench test
5.3.1 Test preparation
5.3.2 EDR system trigger test
5.3.4 Storage overwriting mechanism test
5.3.5 Power-off storage test
5.3.5.1 Before the test, the EDR controller shall have enough storage space, to record a
complete event.
6 Appearance and marking
The surface of the EDR controller shall be marked with vehicle manufacturer
information and controller manufacturer information (abbreviation or logo can be
marked), specifications and models, the unique number of the ECU that records the
EDR data, etc.
7 Extension of vehicle models
7.1 General
For the models that have passed the type inspection according to this standard, the
results can be extended to other models, that meet the determination conditions of 7.2.
After a model has been extended, the extended model cannot be further extended to
other models.
7.2 Judgment conditions
7.2.1 The vehicle manufacturer is the same.
7.2.2 The EDR controller manufacturer is the same.
7.2.3 The EDR controller's model is the same.
7.2.4 For the vehicle impact test, the following conditions are also included.
7.2.5 For the driving operation data test, the following conditions are also included.
The data sources and transmission strategies (referring to data sources, such as buses or
hard wires, sensors, etc.), for information related to driver operations, such as braking,
acceleration, turn signals, are the same.
7.2.6 For the bench test, different software numbers are allowed. The following
conditions are also included.
8 Instruction manual
8.1 For a vehicle, which is equipped with an event data recorder system (EDR), its
product's instruction manual shall at least include.
8.2 For d) ~ g) in 8.1, if it can be obtained through other public means (such as
maintenance manual or official website), it is also deemed to meet the requirements.
9 Implementation of standard
From January 1, 2022, new models for type approval shall meet the requirements, other
than level B data elements and 4.4.From January 1, 2024, new models for type approval
shall meet all the requirements, which are specified in this standard.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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