Powered by Google-Search & Google-Books Chinese Standards Shop Database: 169759 (Oct 25, 2020)
HOME   Quotation   Tax   Examples Standard-List   Contact-Us   View-Cart
  

GB/T 38892-2020

Chinese Standard: 'GB/T 38892-2020'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
GB/T 38892-2020English415 Add to Cart 0--10 minutes. Auto immediate delivery. On-board driving video recording system Valid GB/T 38892-2020
GB/T 38892-2020Chinese34 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]

  In 0~10 minutes time, full copy of this English-PDF will be auto-immediately delivered to your email. See samples for translation quality.  

BASIC DATA
Standard ID GB/T 38892-2020 (GB/T38892-2020)
Description (Translated English) On-board driving video recording system
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard T36
Classification of International Standard 43.040.10
Word Count Estimation 34,318
Date of Issue 2020-06-02
Date of Implementation 2020-12-01
Drafting Organization China Automotive Technology and Research Center Co., Ltd., Traffic Management Science Research Institute of the Ministry of Public Security, Shenzhen Horn Automobile Electronic Equipment Co., Ltd., Huizhou Desaixiwei Automotive Electronics Co., Ltd., Hangzhou Haikang Automotive Technology Co., Ltd., China Information and Communications Research Institute, Great Wall Motor Co., Ltd., Brilliance Auto Group Holdings Co., Ltd., Zhejiang Geely Holding Group Co., Ltd., Pan Asia Automobile Technology Center Co., Ltd., Chongqing Changan Automobile Co., Ltd., Shanghai Automobile Group Co., Ltd. Technology Center, SAIC-GM-Wuling Automobile Co., Ltd., Beijing Xingkedi Technology Co., Ltd., Chongqing Junge Electronic Technology Co., Ltd.
Administrative Organization National Automotive Standardization Technical Committee (SAC/TC 114)
Regulation (derived from) National Standards Announcement No. 14 of 2020
Proposing organization Ministry of Industry and Information Technology of the People's Republic of China
Issuing agency(ies) State Administration of Market Supervision and Administration, National Standardization Management Committee

GB/T 38892-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
On-board Driving Video Recording System
车载视频行驶记录系统
ISSUED ON: JUNE 2, 2020
IMPLEMENTED ON: DECEMBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Terms and Definitions ... 5 
4 Abbreviations and Symbols ... 7 
5 Requirements ... 8 
6 Test Methods ... 23 
Appendix A (informative) Durability Test ... 38 
Appendix B (informative) Durability Test Calculation Model ... 40 
Appendix C (informative) Dynamic Image Quality Evaluation ... 45 
On-board Driving Video Recording System
1 Scope
This Standard stipulates the requirements and test methods for on-board driving video
recording system.
This Standard is applicable to on-board driving video recording system (hereinafter
referred to as the system) for Type-M1 vehicles. The systems for other types of vehicles
may take this Standard as a reference.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 1865-2009 Paints and Varnishes - Artificial Weathering and Exposure to Artificial
Radiation - Exposure to Filtered Xenon-arc Radiation
GB/T 18655-2018 Vehicles, Boats and Internal Combustion Engines - Radio
Disturbance Characteristics - Limits and Methods of Measurement for the Protection
of On-board Receivers
GB/T 19951-2019 Road Vehicles - Disturbances Test Methods for Electrical /
Electronic Component from Electrostatic Discharge
GB/T 21437.2-2008 Road Vehicles - Electrical Disturbances from Conduction and
Coupling - Part 2: Electrical Transient Conduction along Supply Lines Only
GB/T 21437.3-2012 Road Vehicles - Electrical Disturbances from Conduction and
Coupling - Part 3: Electrical Transient Transmission by Capacitive and Inductive
Coupling via Lines Other Than Supply Lines
GB/T 28046.2-2019 Road Vehicles - Environmental Conditions and Testing for
Electrical and Electronic Equipment - Part 2: Electrical Loads
GB/T 28046.3-2011 Road Vehicles - Environmental Conditions and Testing for
Electrical and Electronic Equipment - Part 3: Mechanical Loads
GB/T 28046.4-2011 Road Vehicles - Environmental Conditions and Testing for
Glare refers to the existence of extreme brightness contrast in space or time due to
inappropriate brightness distribution in the field of view, causing visual discomfort and
reduced visibility of objects.
3.11 Ghost
Ghost refers to the additional image eventually formed on the image due to the
existence of a high-brightness target source in the service environment of the product,
which is quickly reflected inside the lens.
3.12 Distortion
Distortion refers to the geometric distortion of the shooting frames relative to the
patterns being photographed.
NOTE: if the captured image is larger than the pattern being photographed, it is pincushion
distortion, otherwise, it is barrel distortion.
4 Abbreviations and Symbols
The following abbreviations and symbols are applicable to this document.
DUT: Device Under Test
HFOV: Horizontal Field of View
LW/PH: Line Widths per Picture Height
MTF: Modulation Transfer Function
PHD: Picture Height Distortion
SNR: Signal Noise Ratio
Tmax: Maximum Operating Temperature
Tmin: Minimum Operating Temperature
UN: Nominal Voltage
USmax: Supply Voltage Maximum
USmin: Supply Voltage Minimum
VFOV: Vertical Field of View
In accordance with 6.5.1.1, conduct the test. Before the vehicle ignites, the system
shall perform self-inspection. If a malfunction occurs, it shall be prompted acoustically
or optically.
5.3.1.2 Error alarm
In accordance with 6.5.1.2, conduct the test. During the system operation, if a
malfunction occurs, it shall be prompted acoustically or optically.
5.3.1.3 Type of malfunction prompts
The type of system malfunction prompts shall at least include:
a) Malfunction of the video acquisition unit;
b) Malfunction of the built-in memory.
The type of prompts and the prompting mode of malfunction alarm signals shall be
explained in the product’s instruction manual.
5.3.2 Information overlay
In accordance with 6.5.2, conduct the test. In the video stream data recorded by the
system, at least the following information shall be overlaid:
a) In the video stream, date and time information shall be overlaid in the format:
yyyy (year) mm (month) dd (date) hh (hour) mm (minute) ss (second), or yyyy-
mm-dd hh:mm:ss;
b) In the video stream, vehicle’s vehicle identification number (VIN) shall be
overlaid;
c) The overlaid information shall not affect the watching of the video stream main
screen.
5.3.3 Continuous video recording
In accordance with 6.5.3, conduct the test. After the system continuously records video
for 4 h, the 4 h video stream data stored in the built-in memory shall be continuous,
and the video stream data image shall manifest no abnormality.
5.3.4 Storage management
5.3.4.1 Built-in memory
The system shall have a built-in memory. In accordance with 6.5.4, conduct the test; it
shall comply with the following requirements:
5.4.9 Automatic gain control time
In accordance with 6.6.9, conduct the test. After switching between different light
sources, the response time of automatic gain control shall be not more than 1 s.
5.4.10 White balance
In accordance with 6.6.10, conduct the test. The neutral color block of the Macbeth 24-
color color test chart does not have obvious color difference; the image cannot
generate color cast. The color saturation (S) value in the #21 and #22 blocks (the
middle two blocks) grayscale card HSV of the 24-color test chart shall be less than
15%.
5.4.11 Color rendition
Color rendition is based on the hue angle of the CIE 1976 chromaticity space. In
accordance with 6.6.11, conduct the test. The Euclidean distance of the actually
measured chromaticity error between each color block and the white block shall be not
less than 0.02.
The hue angle shall satisfy the following requirements:
a) The coordinate of the red color block shall be within the range of (0°, 44.8°)
or (332.2°, 360°);
b) The coordinate of the green color block shall be within the range of (96.6°,
179.9°);
c) The coordinate of the blue color block shall be within the range of (209.9°,
302.2°);
d) The coordinate of the yellow color block shall be within the range of (44.8°,
96.6°).
5.4.12 Glare
In accordance with 6.6.12, conduct the test. When the lens is exposed to extreme
bright light, the area of the generated spot shall be not greater than 25% of the
displayed area.
5.4.13 Ghost
In accordance with 6.6.13, conduct the test. The area ratio of ghost image to the field
of view shall satisfy the following requirements:
a) If the peak brightness ratio of the ghost image to the original image is greater
than 50%, then, the area ratio of ghost image to the field of view shall be less
than 1%;
In accordance with 6.7.1.3, conduct the test. During the test and after the test, the
functional status shall reach Level-A.
5.5.2.4 Slow voltage drop and rise
In accordance with 6.7.1.4, conduct the test. During the test and after the test, when
the voltage is within the range of USmin ~ USmax, the functional status shall reach Level-
A.
5.5.2.5 Slow voltage drop and quick voltage rise
In accordance with 6.7.1.5, conduct the test. During the test and after the test, when
the voltage is within the range of USmin ~ USmax, the functional status shall reach Level-
A.
5.5.2.6 Transient voltage change
5.5.2.6.1 Transient voltage drop
In accordance with 6.7.1.6.1, conduct the test. The functional status shall be not lower
than Level-B.
5.5.2.6.2 Reset performance of voltage sag
In accordance with 6.7.1.6.2, conduct the test. During the test, when the voltage
restores to USmin, and after the test, the functional status shall reach Level-A.
5.5.2.6.3 Startup characteristic
In accordance with 6.7.1.6.3, conduct the test. The functional status shall be not lower
than Level-C.
5.5.2.7 Reverse voltage
In accordance with 6.7.1.7, conduct the test. After the test, the functional status shall
reach Level-A.
5.5.2.8 Short-term power interruption
In accordance with 6.7.1.8, conduct the test. During the test, when the power supply
interruption time does not exceed 100 μs, the functional status shall reach Level-A.
When the power supply interruption time exceeds 100 μs, and does not exceed 10 s,
the functional status shall be not lower than Level-C. After the test, the functional status
shall reach Level-A.
5.5.2.9 Open circuit
5.5.2.9.1 Single-line disconnection
5.5.4.2 Mechanical impact
In accordance with 6.7.3.2, conduct the test. During the test and after the test, no
damage is allowed; the functional status shall reach Level-A. After the test, the MTF
value shall comply with the stipulations of Table 1.
5.5.4.3 Free fall
In accordance with 6.7.3.3, conduct the test. After the test, no invisible damage is
allowed; the functional status shall reach Level-A. The MTF value shall comply with
the stipulations of Table 1.
5.5.4.4 Debris impact
In terms of the video acquisition unit or the system containing the video acquisition unit
installed outside the vehicle, in accordance with 6.7.3.4, conduct the test. After the test,
the lens shall not be broken (the surface coating layer is allowed to have slight damage
that does not affect the image quality); the MTF value shall comply with the stipulations
of Table 1; the functional status shall reach Level-A.
5.5.4.5 Lens wear-resistance
In terms of the video acquisition unit or the system containing the video acquisition unit
installed outside the vehicle, in accordance with 6.7.3.5, conduct the test. After the test,
the lens coating film is not allowed to fall off; the MTF value shall comply with the
stipulations of Table 1; the functional status shall reach Level-A.
5.5.4.6 Harness pull-off force
In terms of systems with harness, in accordance with 6.7.3.6, conduct the test. After
the test, there shall be no phenomena of damage, harness breakage and terminal
dropout, etc.; the functional status shall reach Level-A.
5.5.5 Dustproof and waterproof performance
The dustproof and waterproof performance rating of the system’s shell shall be
determined in accordance with different areas installed on the vehicle. The dustproof
and waterproof rating of the sub-areas is shown in Table 5. In accordance with 6.7.4,
conduct the test. After the test, the MTF value shall comply with the stipulations of
Table 1; the functional status shall reach Level-A.
5.5.6.3.2 High-temperature operation
In accordance with 6.7.5.2.2, conduct the test. The functional status shall be not lower
than Level-B.
5.5.6.4 Temperature gradient
In accordance with 6.7.5.3, conduct the test. The functional status shall be not lower
than Level-B.
5.5.6.5 Temperature cycle
5.5.6.5.1 Temperature cycle with specific rate of change
In accordance with 6.7.5.4.1, conduct the test. The functional status shall be not lower
than Level-B.
5.5.6.5.2 Rapid temperature change with specified conversion time
In accordance with 6.7.5.4.2, conduct the test. After the test, the functional status shall
reach Level-A.
5.5.6.6 Damp heat test
5.5.6.6.1 Damp heat cycle
In terms of system or unit installed in the passenger compartment, in accordance with
6.7.5.5.1, conduct the test. The functional status shall be not lower than Level-B.
In terms of system or unit installed outside the vehicle, there is no requirement.
5.5.6.6.2 Combined temperature / humidity cycle
In terms of system or unit installed outside the vehicle, in accordance with 6.7.5.5.2,
conduct the test. The functional status shall be not lower than Level-B.
In terms of system or unit installed in the passenger compartment, there is no
requirement.
5.5.6.6.3 Steady-state damp heat
In accordance with 6.7.5.5.3, conduct the test. During the test and after the test, the
functional status shall reach Level-A.
5.5.6.7 Ice water impact
In terms of system or unit installed outside the vehicle, in accordance with 6.7.5.6,
conduct the test. During the test and after the test, the functional status shall reach
Level-A.
Working mode B1: test sample is normally electrically connected; all functions are
normally operating; an external display equipment is required.
Working mode B2: test sample is normally electrically connected; all functions are
normally operating, but no external display equipment is required.
6.1.4 Test object
When conducting the tests in 6.2, 6.3, 6.4, 6.5.1 and 6.5.2, test object shall be
complete-vehicle. When conducting other tests, test object shall be the system (the
system shall at least include built-in memory and video acquisition unit, excluding
external memory and display unit).
The video stream and image used for the tests shall all be data exported from the built-
in memory.
6.2 System and Installation Inspection
The tester inspects the system status through visual inspection or touching.
6.3 Dynamic Image Quality Test
Drive on a road with environmental conditions, such as: other driving vehicles, traffic
signs and pedestrians; record a video. Use a video player to watch the video images.
See Appendix C for dynamic image quality evaluation and test methods.
6.4 Field of View Test
6.4.1 Vertical field of view
Under the environmental conditions specified in 6.1.1, conduct the complete-vehicle
test. The test site shall be arranged in accordance with Figure 1, so that the system is
in the working state (if necessary, supplemented by activation measures). See the test
procedures below:
a) At a distance of L and a height of H on the front axis of the video acquisition
unit, place a test chart. Record a video; use a video player to watch it;
b) At a distance of L1 and a height of H1 on the front axis of the video acquisition
unit, hang a test chart. Record a video; use a video player to watch it.
6.4.2 Horizontal field of view
Under the environmental conditions specified in 6.1.1, conduct the complete-vehicle
test. The test site shall be arranged in accordance with Figure 2, so that the system is
in the working state (if necessary, supplemented by activation measures). Record a
video; use a video player to watch it.
6.5.7 Power-off protection
Put DUT under working mode B2. Record a video of more than 10 min. Turn off the
power; record the time t1 when the power is turned off. After the system is completely
shut down, use a video player to check and record the last recording time t2 in the built-
in memory; t2 - t1 shall be greater than 0 s.
6.6 Image Performance Test
6.6.1 Frame rate
Put DUT under working mode B1. In accordance with the method in 6.3.2.1 in QC/T
1128-2019, conduct the test.
6.6.2 Effective pixel
Put DUT under working mode B1. In accordance with the method in 6.3.2.2 in QC/T
1128-2019, conduct the test.
6.6.3 Field viewing angle
Put DUT under working mode B1. In accordance with the method in 6.3.2.3 in QC/T
1128-2019, conduct the test.
6.6.4 MTF value
Put DUT under working mode B1. In accordance with the method in 6.3.2.4 in QC/T
1128-2019, conduct the test.
6.6.5 Signal noise ratio
Put DUT under working mode B1. In accordance with the method in 6.3.2.5 in QC/T
1128-2019, conduct the test.
6.6.6 Dynamic range
Put DUT under working mode B1. In accordance with the method in 6.3.2.6 in QC/T
1128-2019, conduct the test.
6.6.7 Maximum illumination
Put DUT under working mode B1. In accordance with the method in 6.3.2.7 in QC/T
1128-2019, conduct the test.
6.6.8 Minimum illumination
Put DUT under working mode B1. In accordance with the method in 6.3.2.8 in QC/T
1128-2019, conduct the test.
6.7.1.4 Slow voltage drop and rise
Put DUT under working mode B1. In accordance with the method in 4.5.2 in GB/T
28046.2-2019, conduct the test.
6.7.1.5 Slow voltage drop and quick voltage rise
Put DUT under working mode B1, conduct the test.
The test procedures are as follows:
a) Stage of dropping: at the rate of (0.5 ± 0.1) V/min, drop from USmax to 0 V;
b) Stage of rising: in less than 0.5 s, the voltage quickly rises from 0 V to USmax.
6.7.1.6 Transient voltage change
6.7.1.6.1 Transient voltage drop
Put DUT under working mode B1. In accordance with the method that UN is 12 V in
4.6.1.2 in GB/T 28046.2-2019, conduct the test.
6.7.1.6.2 Reset performance of voltage sag
Put DUT under working mode B1. In accordance with the method in 4.6.2.2 in GB/T
28046.2-2019, conduct the test.
6.7.1.6.3 Startup characteristic
Put DUT under working mode B1. In accordance with the method in 4.6.3.2 (Level-II
in Table 3) in GB/T 28046.2-2019, conduct the test.
6.7.1.7 Reverse voltage
Put DUT under working mode A2. In accordance with the method in 4.7.2.3 in GB/T
28046.2-2019, conduct the test. After the test, test under working mode B1.
6.7.1.8 Short-term power interruption
Put DUT under working mode B1. In accordance with the method in Table 9 and the
waveform in Figure 7, conduct the test.
Put DUT under working mode B1. Its data interface shall be tested in accordance with
the method in 4.10.2.1 in GB/T 28046.2-2019.
6.7.1.11 Insulation resistance
Put DUT under working mode B1. In accordance with the method in 4.12.2 in GB/T
28046.2-2019, conduct the test. After the test, test under working mode B1.
6.7.1.12 Reference grounding and power offset
Put DUT under working mode B1. In accordance with the method in 4.8.2 in GB/T
28046.2-2019, conduct the test.
6.7.2 Electromagnetic compatibility test
6.7.2.1 Immunity to electrical disturbance from electrostatic discharge
6.7.2.1.1 Electronic module, not powered on
Put DUT under working mode A1. In accordance with the category 1 test severity level
not lower than L3 test voltage requirements in Table C.1 and Table C.2 in Appendix C,
and the methods in Chapter 9 in GB/T 19951-2019, conduct the test. After the test, test
under working mode B1.
6.7.2.1.2 Electronic module, powered on
Put DUT under working mode B1. In accordance with the category 1 test severity level
not lower than L3 test voltage requirements in Table C.1, C.2 and C.3 in Appendix C,
and the methods in Chapter 8 in GB/T 19951-2019, conduct the test.
6.7.2.2 Immunity to electrical disturbance caused by conduction and coupling
6.7.2.2.1 Immunity to electrical transient conduction along supply lines
Put DUT under working mode B1. In accordance with the immunity test level in Table
4, and the method of pulse 1, 2a, 2b, 3a, 3b, 4, 5b in GB/T 21437.2-2008, conduct the
test.
6.7.2.2.2 Immunity to electrical transient conduction by capacitive coupling other
than supply lines
Put DUT under working mode B1. In accordance with CCC mode and the requirements
of Level-III in Table B.1, and the method in 3.4.2 in GB/T 21437.3-2012, conduct the
test.
6.7.2.3 Immunity to electromagnetic radiation
Put DUT under working mode B1. In accordance with the immunity test intensity of
6.7.3.5 Lens wear-resistance
Put DUT under working mode A1. In accordance with the method stipulated in 6.6.5 in
QC/T 1128-2019, conduct the test. After the test, test under working mode B1; in
accordance with 6.6.4, test the MTF value.
6.7.3.6 Harness pull-off force
Put DUT under working mode A1. In accordance with the method stipulated in 6.6.6 in
QC/T 1128-2019, conduct the test. After the test, test under working mode B1.
6.7.4 Dustproof and waterproof test
6.7.4.1 Dustproof
Put DUT under working mode A2. In accordance with the method stipulated in 8.3.3.2
in GB/T 30038-2013, conduct the test. After the test, test under working mode B1; in
accordance with 6.6.4, test the MTF value.
6.7.4.2 Waterproof
Put DUT under working mode A2. In accordance with the method stipulated in 8.4.3 in
GB/T 30038-2013, conduct the test. After the test, test under working mode B1; in
accordance with 6.6.4, test the MTF value.
NOTE: in terms of the image acquisition unit installed in the passenger compartment, only
the lens surface shall be tested.
6.7.5 Environmental weather resistance test
6.7.5.1 Low-temperature test
6.7.5.1.1 Low-temperature storage
Put DUT under the lower limit of storage temperature in Table 6 and working mode A1;
in accordance with the method in 5.1.1.1.2 in GB/T 28046.4-2011, conduct the test.
After the test, let it rest for 2 h to return to normal temperature, then, under working
mode B1, conduct the test.
6.7.5.1.2 Low-temperature operation
Put DUT under Tmin and working mode B1. In ac......
Related standard:   GB/T 25085.3-2020  GB/T 25085.4-2020
Related PDF sample:   GB/T 38444-2019
   
 
Privacy   ···   Product Quality   ···   About Us   ···   Refund Policy   ···   Fair Trading   ···   Quick Response
Field Test Asia Limited | Taxed in Singapore: 201302277C | Copyright 2012-2020