GB/T 38444-2019 PDF in English
GB/T 38444-2019 (GB/T38444-2019, GBT 38444-2019, GBT38444-2019)
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Electronic toll collection -- On board unit
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GB/T 38444-2019: PDF in English (GBT 38444-2019) GB/T 38444-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
Electronic toll collection - On board unit
ISSUED ON: DECEMBER 31, 2019
IMPLEMENTED ON: JULY 01, 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, definitions and abbreviations ... 5
4 Technical requirements ... 6
5 Test method ... 12
6 Inspection rules ... 20
Appendix A (Informative) ETC RSU simulator parameter table ... 22
Appendix B (Informative) Durability test ... 24
Appendix C (Informative) Durability test calculation model ... 26
Electronic toll collection - On board unit
1 Scope
This Standard specifies the technical requirements, test methods and
inspection rules of the electronic toll collection on board unit.
This Standard applies to electronic toll collection on board unit that is powered
directly by the vehicle.
Other on board payment electronic units can be implemented by reference.
2 Normative references
The following documents are indispensable 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/T 1865-2009, Paints and varnishes - Artificial weathering and exposure
to artificial radiation - Exposure to filtered xenon-arc radiation
GB/T 2828.1, Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
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 20851.1, Electronic toll collection - Dedicated short range
communication - Part 1: Physical layer
GB/T 20851.2, Electronic toll collection - Dedicated short range
communication - Part 2: Data link layer
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 28046.1-2011, Road vehicles - Environmental conditions and testing
for electrical and electronic equipment - Part 1: General
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 electrical and electronic equipment - Part 4: Climatic loads
GB/T 28046.5-2013, Road vehicles - Environmental conditions and testing
for electrical and electronic equipment - Part 5: Chemical loads
GB/T 30038-2013, Road vehicles - Degrees of electrical equipment
protection (IP-Code)
GB 34660-2017, Road Vehicles - Requirements And Test Methods Of
Electromagnetic Compatibility
3 Terms, definitions and abbreviations
3.1 Terms and definitions
The following terms and definitions are applicable to this document.
3.1.1 Electronic toll collection on board unit
An electronic device that is installed in the vehicle and performs two-way
communication with ETC RSU to realize the electronic toll collection function.
3.1.2 Electronic toll collection roadside unit
An electronic device that is installed outside the vehicle and performs two-way
communication with ETC OBU to realize the electronic toll collection function.
3.1.3 Transaction
The process where ETC OBU and ETC RSU establish a communication link
and complete the toll collection.
3.2 Abbreviations
The following abbreviations apply to this document.
BER: bit error rate
Perform the test according to 5.3.5.1.5.2. After the voltage is restored to USmin
in the test and after the test, the transaction function of ETC OBU shall be
normal.
4.5.2.5.3 Startup characteristics
Perform the test in accordance with 5.3.5.1.5.3. After the test, the transaction
function of ETC OBU shall be normal.
4.5.2.6 Backward voltage
Perform the test in accordance with 5.3.5.1.6. After the test, an internal
inspection (whether internal components are damaged) is required; the
transaction function of ETC OBU shall be normal.
4.5.2.7 Reference ground and power offset
Perform the test in accordance with 5.3.5.1.7. For multi-grounded ETC OBU,
the ETC OBU transaction function shall be normal during and after the test.
4.5.2.8 Open circuit
4.5.2.8.1 Single-line open circuit
Perform the test in accordance with 5.3.5.1.8.1. After the test, the transaction
function of ETC OBU shall be normal.
4.5.2.8.2 Multi-line open circuit
Perform the test in accordance with 5.3.5.1.8.2. After the test, the transaction
function of ETC OBU shall be normal.
4.5.2.9 Short circuit protection
Perform the test in accordance with 5.3.5.1.9. After the test, the transaction
function of ETC OBU shall be normal.
4.5.2.10 Insulation resistance
Perform the test in accordance with 5.3.5.1.10. The insulation resistance of ETC
OBU shall be greater than 10 MΩ. After the test, the transaction function of ETC
OBU shall be normal.
4.5.3 Dustproof performance
The protection level of ETC OBU that is installed in the passenger compartment
shall meet the requirements of IP5X in GB/T 30038-2013. Perform the test in
accordance with 5.3.5.2. After the test, the transaction function of ETC OBU
shall be normal.
Perform the test in accordance with 5.3.5.4.3. After the test, no damage is
allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.5 High temperature operation
Perform the test in accordance with 5.3.5.4.4. During and after the test, no
damage is allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.6 Temperature gradient
Perform the test in accordance with 5.3.5.4.5. During and after the test, no
damage is allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.7 Rapid temperature change of specified transition time
Perform the test in accordance with 5.3.5.4.6. After the test, no damage is
allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.8 Temperature cycle of specified rate of change
Perform the test in accordance with 5.3.5.4.7. During and after the test, no
damage is allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.9 Damp heat cycle
Perform the test in accordance with 5.3.5.4.8. During and after the test, no
damage is allowed, and the transaction function of ETC OBU shall be normal.
4.5.5.10 Damp heat in steady state
Perform the test in accordance with 5.3.5.4.9. No damage is allowed; during
the last 1 h of the test and after the test, the transaction function of ETC OBU
shall be normal.
4.5.5.11 Solar radiation
For the ETC OBU that is installed in the direct sunlight in the passenger
compartment, perform the test in accordance with 5.3.5.4.10. After the test, the
surface shall be free from fall-offs, cracks and bubbles.
The ETC OBU that is installed in the passenger compartment where it is not
exposed to direct sunlight is not required.
4.5.6 Chemical load
Perform the test in accordance with 5.3.5.5. After the test, no damage is allowed,
and the transaction function of ETC OBU shall be normal.
4.5.7 Electromagnetic compatibility
1 -- wave-transmitting material;
2 -- observation window;
d1 -- the distance between the outer surface of the wave-transmitting material
and the ETC RSU simulator antenna, in meters (m);
d2 -- the distance between the ETC OBU receiving antenna and the inner
surface of the wave-transmitting material, in meters (m).
Figure 2 -- Schematic diagram of the test environment with thermostat
5.3.3 ETC RSU simulator
See Appendix A for ETC RSU simulator parameters.
The ETC RSU simulator of other on board payment electronic units shall also
meet the requirements of corresponding standards.
5.3.4 Transaction test steps
Place the tested ETC OBU in a prescribed test environment; at the same time
of conducting environmental assessment, test the tested ETC OBU transaction
function through the ETC RSU simulator. The transaction test steps are as
follows:
a) The ETC RSU simulator initiates a transaction process every 3 s (if it’s
performing a durability test, the ETC RSU simulator initiates a transaction
process every 6 s; the durability test is shown in Appendix B; the durability
test calculation model is shown in Appendix C); if the tested ETC OBU
response is correct, it is deemed to have completed a transaction.
b) Repeat step a) to perform continuous tests; monitor the transaction
completion status.
If it is necessary to perform the transaction function test after the environmental
assessment test, step a) shall be continued for 20 times for the continuous test
after the environmental assessment test is completed; the status of transaction
completion shall be monitored.
5.3.5 Environmental assessment test procedure
5.3.5.1 Electrical performance test
5.3.5.1.1 DC working voltage test
ETC OBU uses the working mode 3.2 that is defined by GB/T 28046.1-2011; it
first adjust the DC regulated power supply voltage to UN; then, it gradually adjust
5.3.5.3.1 Mechanical vibration test
The ETC OBU simulates the installation method on the vehicle to fix on the
vibrating table. It uses the working mode 3.2 that is defined by GB/T 28046.1-
2011, and performs the test in accordance with the method of 4.1.2.4.2 in GB/T
28046.3-2011.
5.3.5.3.2 Mechanical shock test
ETC OBU uses the working mode 3.2 that is defined in GB/T 28046.1-2011 and
performs the test according to the method of 4.2.2.2 in GB/T 28046.3-2011.
5.3.5.3.3 Free fall test
ETC OBU uses the working mode 1.1 that is defined in GB/T 28046.1-2011 and
performs the test according to the method of 4.3.2 in GB/T 28046.3-2011. After
the test, perform the test in accordance with the working mode 3.2 that is
defined in GB/T 28046.1-2011.
5.3.5.4 Environmental weatherability test
5.3.5.4.1 Low temperature storage test
ETC OBU uses the storage temperature lower limit of Table 2 and the working
mode 1.1 that is defined by GB/T 28046.1-2011, and performs the test
according to the method of 5.1.1.1.2 in GB/T 28046.4-2011. After the test, let it
stand for 2 h to return to normal temperature, and perform the test in
accordance with the working mode 3.2 that is defined in GB/T 28046.1-2011.
5.3.5.4.2 Low temperature operation test
ETC OBU uses Tmin and the working mode 3.2 that is defined by GB/T 28046.1-
2011, and performs the test according to the method of 5.1.1.2.2 in GB/T
28046.4-2011. After the test, let it stand for 2 h to return to normal temperature,
and perform the test in accordance with the working mode 3.2 that is defined in
GB/T 28046.1-2011.
5.3.5.4.3 High temperature storage test
ETC OBU uses the storage temperature upper limit of Table 2 and the working
mode 1.1 that is defined by GB/T 28046.1-2011, and performs the test
according to the method of 5.1.2.1.2 in GB/T 28046.4-2011. After the test, let it
stand for 2 h to return to normal temperature, and perform the test in
accordance with the working mode 3.2 that is defined in GB/T 28046.1-2011.
5.3.5.4.4 High temperature operation test
the test for 600 h according to method 2 of GB/T 1865-2009 and cycle C in
Table 3.
5.3.5.5 Chemical load test
ETC OBU that is installed in the passenger compartment uses the working
mode 1.1 that is defined in GB/T 28046.1-2011, selects reagents and exposure
conditions according to the installation position code [B] in Table 1 of GB/T
28046.5-2013, and performs the test according to the wetting method in Table
2 and the procedure of 4.8. After the test, perform the test in accordance with
the working mode 3.2 that is defined in GB/T 28046.1-2011.
5.3.5.6 Electromagnetic compatibility test
5.3.5.6.1 Immunity test to electrical disturbances from electrostatic
discharge
5.3.5.6.1.1 Unpowered electronic module
ETC OBU uses the working mode 1.1 that is defined in GB/T 28046.1-2011 and
performs the test according to the test voltage requirement that the test severe
level of category 1 in Table C.1 and Table C.2 of Appendix C of GB/T 19951-
2019 is not lower than L3 and the method that is specified in Chapter 9. After
the test, perform the measurement in accordance with the working mode 3.2
that is defined in GB/T 28046.1-2011.
5.3.5.6.1.2 Powered electronic module
ETC OBU uses the working mode 3.2 that is defined in GB/T 28046.1-2011 and
performs the test according to the test voltage requirement that the test severe
level of category 1 in Table C.1, Table C.2 and Table C.3 of Appendix C of GB/T
19951-2019 is not lower than L3 and the method that is specified in Chapter 8.
5.3.5.6.2 Test of immunity to electrical disturbances from conduction and
coupling
5.3.5.6.2.1 Immunity to electrical transient conduction along power lines
ETC OBU uses the working mode 3.2 that is defined in GB/T 28046.1-2011,
and performs the test according to the immunity test level that is specified in
Table 3, the method of 5.8 in GB 34660-2017, and the method of pulse 5a/5b
of GB/T 21437.2-2008.
5.3.5.6.2.2 Electrical transient immunity by capacitive and inductive
coupling via lines other than power lines
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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