GB/T 43249-2023Automotive passive infrared detection system (English PDF)

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 Mohm. 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.

6.1.3.3 Knife-edge target

The inclination angle of the knife-edge target alpha 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.

(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.

6.5.3.7.2 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.

7.1 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 […]