GB/T 43249-2023 PDF in English
GB/T 43249-2023 (GB/T43249-2023, GBT 43249-2023, GBT43249-2023)
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Automotive passive infrared detection system
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GB/T 43249-2023: PDF in English (GBT 43249-2023) GB/T 43249-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
CCS T 36
Automotive passive infrared detection system
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: NOVEMBER 27, 2023
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Symbols and abbreviations ... 7
5 Technical requirements ... 8
6 Test method ... 20
7 Inspection rules ... 39
Appendix A (Informative) Durability test ... 41
Appendix B (Informative) Durability test calculation model ... 43
Appendix C (Informative) Target style ... 47
Automotive passive infrared detection system
1 Scope
This document specifies the technical requirements, test methods, inspection rules for
automotive passive infrared detection systems.
This document applies to automotive passive infrared detection systems based on
uncooled infrared focal plane detectors for sensing the external environment
(hereinafter referred to as systems).
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for dated references, only the
version corresponding to that date applies to this document; for undated references, the
latest version (including all amendments) applies to this document.
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 21437.2-2021 Road vehicles - Test method of electrical disturbances from
conduction and coupling - Part 2: Electrical transient conduction along supply lines
only
GB/T 21437.3-2021 Road vehicles - Test method of 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
shall reach grade A.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.8 Short-term power interruption
Carry out test according to 6.5.1.8. During the test, when the power interruption time
does not exceed 100 μs, the functional status of the system shall reach grade A. When
the power interruption time exceeds 100 μs and does not exceed 2 s, the functional
status of the system shall not be lower than grade C. The functional status of the system
after the test shall reach grade A.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.9 Open circuit
5.4.2.9.1 Single line open circuit
Carry out test according to 6.5.1.9.1. The functional status of the system after the test
shall reach grade A.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.9.2 Multi-line open circuit
Carry out test according to 6.5.1.9.2. The functional status of the system shall reach
grade A after the test.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.10 Short circuit protection
Carry out test according to 6.5.1.10, the functional status of the system shall reach grade
A after the test.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.11 Insulation resistance
The insulation resistance of the system shall not be less than 10 MΩ. Carry out test
according to 6.5.1.11. The functional status shall reach grade A after the test.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.2.12 Reference grounding and power supply offset
Carry out test according to 6.5.1.12. The functional status of the system shall not be
lower than grade B.
Note: For PoC powered systems, the requirements and test methods are determined by
negotiation between the supplier and buyer.
5.4.3 Mechanical properties
5.4.3.1 Mechanical vibration
Carry out test according to 6.5.2.1. The system shall not be physically damaged during
and after the test. The functional status shall reach grade A. The MTF value after the
test shall comply with the provisions of Table 1.
5.4.3.2 Mechanical shock
Carry out test according to 6.5.2.2. The system shall not be physically damaged during
and after the test. The functional status shall reach grade A. The MTF value after the
test shall comply with the provisions of Table 1.
5.4.3.3 Free fall
Carry out test according to 6.5.2.3. The system is not allowed to have hidden damage
after the test, whilst minor damage to the shell is allowed. The functional status shall
reach grade A. The MTF value shall comply with the provisions of Table 1.
5.4.3.4 Gravel impact
Lens installed on the outside of the vehicle shall be tested in accordance with 6.5.2.4.
After the test, the lens or window shall not be broken (slight damage to the surface
coating layer that does not affect the image quality is allowed); the system's functional
status shall reach grade A; the MTF value shall comply with the provisions of Table 1.
5.4.3.5 Lens wear resistance
Lens installed on the outside of the vehicle shall be tested in accordance with 6.5.2.5.
After the test, the lens coating layer shall not fall off; the system's functional status shall
reach grade A; the MTF value shall comply with the provisions of Table 1.
5.4.3.6 Harness pull-off force
Systems with harnesses shall be tested in accordance with 6.5.2.6. After the test, there
shall be no damage, harness breakage, terminal detachment, etc.; the system's functional
status shall reach grade A.
Carry out test according to 6.5.3.4.1. The functional status of the system shall not be
lower than Grade B.
5.4.4.5.2 Rapid temperature change with specified switching time
Carry out test according to 6.5.3.4.2. The functional status of the system shall reach
Grade A after the test.
5.4.4.6 Damp heat test
5.4.4.6.1 Damp heat cycle
For systems or units installed inside the passenger compartment, carry out test
according to 6.5.3.5.1. The functional status of the system shall not be lower than grade
B; there shall be no condensation inside the display area.
No requirements are made for systems or units installed outside the vehicle.
5.4.4.6.2 Temperature/humidity combined cycle
For systems or units installed outside the vehicle, the system functional status shall not
be lower than grade B and there shall be no condensation inside the display area, when
tested according to 6.5.3.5.2.
For systems or units installed inside the passenger compartment, no requirements are
made.
5.4.4.6.3 Steady-state damp heat
Carry out test according to 6.5.3.5.3. The functional status of the system shall reach
grade A in the last hour of the test and after the test; there shall be no condensation
inside the display area.
5.4.4.7 Ice water shock
For systems or units installed outside the vehicle, carry out the test according to 6.5.3.6.
During and after the test, the functional status of the system shall reach grade A.
For systems or units installed in the passenger compartment, no requirements are made.
5.4.4.8 Salt spray corrosion resistance
5.4.4.8.1 Corrosion
For systems or units installed outside the vehicle, carry out the test according to
6.5.3.7.1. After the test, the sealing function shall be normal; the signs and labels shall
be clearly visible; the functional status of the system shall reach grade A.
(horizontal field of view)/number of horizontal pixels, the field of view unit is radian,
the unit of target frequency a is cy/mrad. The four-bar target shall conform to the focal
length characteristic frequency of the DUT. The style of the four-bar target is as shown
in Appendix C.
6.1.3.3 Knife-edge target
The inclination angle of the knife-edge target α shall be 5°; the style is shown in
Appendix C.
6.1.4 Test working mode
6.1.4.1 Working mode A (test sample not electrically connected)
Working mode A1: The DUT is not powered on and is not connected to the connector
or wiring harness.
Working mode A2: The DUT is not powered on and is connected to the connector and
wiring harness.
6.1.4.2 Working mode B (test sample electrically connected)
Working mode B: DUT is electrically connected normally; all functions are running
normally.
6.2 Appearance and structure inspection
Set DUT to working mode A1. Perform visual and tactile inspection at a viewing
distance of about 300 mm, under the lighting conditions of 800 lx ± 80 lx.
6.3 Functional test
6.3.1 Display mode test
Set DUT to working mode B. Use a monitor or network to connect to the main video
output interface of DUT. Call the display mode change function through the main
control terminal or client software, to view the output image.
6.3.2 Image adjustment test
Set DUT to working mode B. Use a monitor or network to connect DUT. Observe
objects of different temperatures under the same ambient temperature in the white hot
mode, to confirm whether the image brightness and contrast are automatically adjusted
when DUT is aimed at objects of different temperatures. For example, when observing
the target scene of a high-temperature object, the image contrast increases, the bright
area automatically brightens, the dark area automatically darkens.
6.3.3 Window heating test
Set the DUT to working mode B and place the system in a temperature chamber. The
temperature chamber accuracy shall be ±0.5 °C. Set the ambient temperature to be 5 °C
higher than the high temperature threshold; continue to cool at a rate of 1 °C /3 min
until it drops below the low temperature threshold of 5 °C. Hold the temperature for 1
h. Use a temperature sensor to measure the temperature closely to the window, to check
whether the window temperature increases by 5 °C within 30 s. When the window
temperature reaches the high temperature threshold, check whether the window
temperature does not continue to rise as expected.
6.3.4 High temperature burn resistance test
Set the black body temperature to 1500 °C. The band at least covers the photosensitive
band of the DUT; the emissivity is not less than 0.98.
Set the DUT to working mode B. When the output image is normal, aim the system at
the black body at a distance of 5000 mm without glass window blocking for 10 s. Shut
down the system and restart after 10 minutes. After 10 minutes of normal operation,
collect the 15 °C standard black body image and record it in the image acquisition card.
Check the image in the image acquisition card; compare it with the 15 °C standard black
body image collected before the test.
Repeat the above test, including the step of aligning the 1500 °C black body; the DUT
is tested in working mode A1.
6.4 Image performance test
6.4.1 Resolution
Set the DUT to working mode B. Test the output video signal by the video analysis
equipment.
6.4.2 Sampling frame rate
Set the DUT to working mode B. Test the output video signal by the video analysis
equipment.
6.4.3 MTF
Arrange the test equipment as shown in Figure 2. Use the bevel test target according to
the inclination requirements in ISO 12233. Test the DUT in working mode B. Follow
the steps below:
a) Adjust the distance between the DUT and the test target, so that the distance
between the DUT lens surface and the test target meets the minimum focusing
distance. The test target covers the central field of view and at least two 70%
fields of view; the length of each square edge is not less than 10 pixels;
b) Turn on the turntable, to align the optical axis of the DUT lens with the center of
the turntable. The diameter of the turntable in the image is not less than 1/3 of the
height of the DUT imaging screen, so that the high temperature target in the
turntable can be clearly imaged;
c) Record the video; each segment contains at least 2 freeze phenomena; record at
least 10 segments;
d) Analyze the time interval between 2 freezes in each segment; take the minimum
value.
6.5 Environmental evaluation test
6.5.1 Electrical performance test
6.5.1.1 DC power supply voltage test
DUT is in working mode B. First adjust the DC regulated power supply voltage to Ut;
then gradually adjust the voltage to USmin and stabilize for 10 minutes. Gradually adjust
the voltage to USmax and stabilize for 10 minutes. During and after the test, check the
functional status. After the test, the MTF test is performed according to 6.4.3.
6.5.1.2 Overvoltage test
6.5.1.2.1 Under (Tmax - 20 °C) conditions
Set the DUT to working mode B. The DUT with UN of 12 V is tested according to the
method in 4.3.1.1.2 of GB/T 28046.2-2019. The DUT with UN of 24 V is tested
according to the method in 4.3.2.2 of GB/T 28046.2-2019. During and after the test, the
functional status is checked.
6.5.1.2.2 Under room temperature conditions
Set the DUT to working mode B. The DUT with UN of 12 V is tested according to the
method in 4.3.1.2.2 of GB/T 28046.2-2019. During and after the test, the functional
status is checked.
6.5.1.3 Superimposed AC voltage test
Set the DUT to working mode B. Perform the test according to the method of 4.4.2
Severity Level 1 in GB/T 28046.2-2019. Perform functional status check during and
after the test.
6.5.1.4 Supply voltage slow-down and slow-up test
Set the DUT to working mode B and perform the test according to the method of 4.5.2
in GB/T 28046.2-2019. Perform functional status check during and after the test.
6.5.3.3 Temperature gradient
Set the DUT to working mode A2. Perform the test in the range of Tmin ~ Tmax according
to the method in 5.2.2 of GB/T 28046.4-2011. During the test, when each temperature
point reaches stability and after the test, let it stand for 2 hours to return to normal
temperature. Perform a functional status check in working mode B.
6.5.3.4 Temperature cycle
6.5.3.4.1 Temperature cycle at specified change rate
Set the DUT to working mode A2. Perform the test in the range of Tmin ~ Tmax according
to the method in 5.3.1.2 of GB/T 28046.4-2011. During each cycle of the test, when the
entire DUT reaches Tmin and the 210th to 410th minutes of the cycle, and after the test,
let it stand for 2 hours to return to normal temperature. Perform a functional status check
in working mode B.
6.5.3.4.2 Rapid temperature change at specified switching time
Set the DUT to working mode A1 and perform the test in the range of Tmin ~ Tmax
according to the method in 5.3.1.3 of GB/T 28046.4-2011. After the test, let it stand for
2 hours to return to normal temperature. Check the functional status in working mode
B.
6.5.3.5 Damp heat test
6.5.3.5.1 Damp heat cycle
Set the DUT to working mode A2 and perform the test in accordance with the method
in 5.6.2.2 of GB/T 28046.4-2011. In each cycle of the test, when the entire DUT reaches
the highest temperature of the cycle and after the test, let it stand for 2 hours to return
to normal temperature. Check the functional status in working mode B.
6.5.3.5.2 Temperature/humidity combined cycle
Set the DUT to working mode A2 and perform the test according to the method in
5.6.2.3 of GB/T 28046.4-2011. In each cycle of the test, when the DUT reaches the
highest temperature of the cycle and after the test, let it stand for 2 hours to return to
normal temperature. Perform a functional status check in working mode B.
6.5.3.5.3 Steady-state damp heat
Set the DUT to working mode A2 and perform the test according to the method in 5.7.2
of GB/T 28046.4-2011. In the last hour of the test and after the test, let it stand for 2
hours to return to normal temperature. Perform a functional status check in working
mode B.
6.5.3.6 Ice water shock
Set the DUT to working mode A2 and perform the test according to the method in
5.4.2.1 of GB/T 28046.4-2011. In the last 17 minutes of each cycle of the test and after
the test, let it stand for 2 hours to return to normal temperature. Perform a functional
status check in working mode B.
6.5.3.7 Salt spray resistance test
6.5.3.7.1 Corrosion
Set the DUT to working mode A2 and perform the test according to the method in
5.5.1.2 of GB/T 28046.4-2011. Perform a functional check in working mode B after the
test.
6.5.3.7.2 Leakage and function
Set the DUT to working mode B and perform the test according to the method in 5.5.2.2
of GB/T 28046.4-2011. Perform a functional status check in working mode B, between
the 4th and 5th hours of each cycle in the test and after the test.
6.5.3.8 Solar radiation test
For systems or units installed outside the vehicle, set the DUT to working mode A1 and
perform a 600h test according to the provisions of Table 1 (Method A) and Table 3
Cycle 1 in ISO 4892-2:2013. Perform a functional status check in working mode B after
the test.
For systems or units installed in direct sunlight in the passenger compartment, set the
DUT to working mode A1 and perform a 600h test in accordance with Table 2 (Method
B) and Cycle 2 in Table 3 of ISO 4892-2:2013. After the test, perform a functional status
check in working mode B.
6.5.4 Dustproof and waterproof test
6.5.4.1 Dustproof test
Set the DUT to working mode A2 and perform the test in accordance with the method
specified in 8.3.3.2 of GB/T 30038-2013. After the test, perform a functional status
check in working mode B.
6.5.4.2 Waterproof test
Set the DUT to working mode A2 and perform the test in accordance with the method
specified in 8.4.3 of GB/T 30038-2013. After the test, perform a functional status check
in working mode B.
6.5.5 Chemical load test
For systems or units installed inside the passenger compartment, set the DUT to
6.5.6.4 Radio disturbance characteristic test
6.5.6.4.1 Conducted disturbance limit
Set the DUT to working mode B. Perform the test according to the methods in 6.3 and
6.4 of GB/T 18655-2018.
6.5.6.4.2 Radiated disturbance limit
Set the DUT to working mode B. Perform the test according to the method in 6.5 of
GB/T 18655-2018.
6.6 Durability test
See Appendix A for durability test and Appendix B for durability test calculation model.
7 Inspection rules
7.1 Exit-factory inspection
The exit-factory inspection items of the system shall at least include appearance and
structure inspection and function inspection.
7.2 Type inspection
7.2.1 Sampling and grouping of type inspection
Type inspection shall be carried out from the system that has passed the exit-factory
inspection according to the one-time sampling plan specified in GB/T 2828.1. First, re-
inspect according to the items of exit-factory inspection. The number of samples after
re-inspection is 6 pcs per group, a total of 8 groups. Each sample shall be assigned a
sample number and a group number.
The system shall be tested in the following groups in sequence.
a) Group 1: Functional test, image performance test, salt spray resistance test (3 DUT
for corrosion test; 3 DUT for leakage and functional test).
b) Group 2: Electrical performance test, harness pull-off force test, chemical load
test.
c) Group 3: Temperature test, damp heat test.
d) Group 4: Free drop test, mechanical impact test, lens wear test.
e) Group 5: Mechanical vibration test, gravel impact test.
f) Group 6: Dust and waterproof test (3 DUT for dustproof test; 3 DUT for water
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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