GB/T 35369-2017Passenger detection device for vehicle seat belt reminder (English PDF)

3.1 Passenger detection device

A device for detecting the occupancy of a seat, consisting of a detection unit and a connection harness.

3.2 Seat occupied

The seat is occupied by a passenger who is not lighter than the Hybrid III 5th percentile female weight.

4.1 Functional requirements

4.1.1 When the detection function test is carried out in accordance with the test method specified in 5.2, the detection device displays that the seat is occupied, and the result is regarded as "conforming"; otherwise it is regarded as "non-conforming".

4.1.2 When the non-detection function test is carried out in accordance with the test method specified in 5.3, the detection device displays that the seat is not occupied, and the result is regarded as "conforming"; otherwise it is regarded as "non-conforming".

4.2 Application requirements

The application requirements include the cyclic damp heat reliability, kneeling durability and reliability, and durability and reliability of human body entry-exit seat. After the product of application requirements is tested in accordance with the test methods specified in 5.4, 5.5, and 5.6, the functional test is carried out according to 5.2 and 5.3, which shall meet the requirements of 4.1.

4.3 Environmental adaptability requirements

The environmental adaptability requirements include cyclic cold heat adaptability, thermal shock adaptability, and chemical corrosion resistance.

5.1 Test environment

The room temperature environment is defined as temperature of (25 ± 3) °C and relative humidity of (45 ~ 75) %.

5.2 Detection function

5.2.1 Test devices

The test devices used for the detection function test include.

5.2.2 Test procedures

5.2.2.1 MOUNT the specimens in matched car seats at a temperature of (25 ± 3) °C, (-40 ± 2) °C and (55 ± 2) °C for at least 6h, respectively. After storing in each temperature condition, KEEP the seat in this temperature environment until the test is completed. The seats stored under low-temperature and high-temperature environments are allowed to be removed from the temperature environment box and tested at room temperature. However, the test shall be completed within 15min.

5.2.2.6 REFER to Figure 1 for minimum detection area. MOVE the detection object or real person right by 20mm. RECORD the output of the detection device at this time.

5.2.2.7 After the detection object or real person is evacuated, the seat is in a vacant state. The detection device displays that the seat is not occupied.

5.3 Non-detection function

5.3.2.2 PLACE the seat on the test bench. CONNECT the sample to the detection device. When it is first confirmed that the seat is in a vacant state, the detection device displays that the seat is not occupied.

5.3.2.3 PLACE the tool 1 above the passenger detection device on the seat surface, covering as much of the entire passenger detection device area as possible. There shall not be less than two detection positions. When placing the tool 1, MAKE sure that its bottom surface of 150mm × 300mm is placed downward, as shown in Figure 3.RECORD the output of the detection device when the tool 1 is placed at each detection position.

5.3.2.4 HOLD the handle of the tool 2.PLACE the probe of the tool 2 perpendicular to the seat surface. The detection position shall be selected in the passenger detection device area. There shall not be less than three detection positions. RECORD the output of the detection device when the tool 2 is placed at each detection position.

5.3.1 Test devices

The test devices used for the non-detection function test include.

5.4 Cyclic damp heat test

6.1 Inspection classification

The inspections are divided into exit-factory inspection and type inspection.

6.2 Exit-factory inspection

6.2.1 The exit-factory inspection items, sampling methods, and acceptance

6.3 Type inspection

6.3.1 The type inspection shall be carried out under one of the following circumstances.

6.3.2 The specimens used for the type inspection shall be randomly selected from the products that have passed the exit-factory inspection and are able to cover the entire processing technology. The type inspection items are all items listed in Table 1.

6.3.3 The specimens required for all type inspection items constitute a specimen group. When all items listed in Table 1 are tested to be "conforming", it is determined that the type inspection for this group of specimens is qualified. […]