QC/T 1072-2017Automotive gear position sensors (English PDF)

4.6 Temperature resistance

4.6.1 Low-temperature storage performance

When the sensor is subject to the low-temperature storage test at -40 °C and restored at the test environment for 2 h, the performance shall be in accordance with the provisions of 4.2.

4.6.2 High-temperature storage performance

When the sensor is subject to the high-temperature storage test at 85 °C and restored at the test environment for 2 h, the performance shall be in accordance with the provisions of 4.2.

4.6.3 Resistance to rapid temperature changes

When the sensor is subject to the rapid temperature changes (low-temperature at -40 °C and high-temperature at 125 °C) and restored at the test environment for 2 h, the performance shall be in accordance with the provisions of 4.2.

4.6.4 Low-temperature working performance

When the sensor is subject to the low-temperature resistance test at -40 °C, the performance of the sensor shall be in accordance with the provisions of 4.2.

4.6.5 High-temperature working performance

When the sensor is subject to the high-temperature resistance test at 125 °C, the performance of the sensor shall be in accordance with the provisions of 4.2.

4.6.6 Temperature drift performance

The temperature drift of the sensor within the working temperature range shall not exceed:

- The output of voltage signal is 40 mV;

- The output of PWM signal is 1.2%.

5.3.2 Response time

Mount the sensor on a dedicated test device, turn it from 0 degrees to a maximum angle at a speed of not more than 10 rad/s. Measure the time required from reaching the maximum angle until the sensor's output signal meets the requirements of 4.2.1. Turn it from the maximum angle point to 0 degrees at a speed of not more than 10 rad/s, measure the time required from reaching to 0 degrees until the sensor's output signal meets the requirements of 4.2.1.

5.4 Test of resistance to working voltage

Apply the minimum and maximum operating voltages for the sensor according to Table 1. Check the basic performance according to 5.3.

5.5 Test of resistance to abnormal voltage

5.5.1 Test of reverse connection of power polarity

It is carried out according to the provisions of 4.7.2.3 of GB/T 28046.2-2011.

The test voltage of a 5 V sensor is 5 V.

5.5.2 Test of power overvoltage

It is carried out according to the provisions of 4.3.1.1.2 or 4.3.2.2 of GB/T 28046.2-2011. The test voltage of a 5 V sensor is 7 V.

5.6 Test of insulation withstanding voltage

It is carried out according to the provisions of 4.11.2 of GB/T 28046.2-2011.

5.7 Test of temperature resistance

5.7.1 Low-temperature storage test

It is carried out according to the provisions of 5.1.1.1.2 of GB/T 28046.4-2011.

5.7.2 High-temperature storage test

It is carried out according to the provisions of 5.1.2.1.2 of GB/T 28046.4-2011.

5.7.3 Test of resistance to rapid temperature change

Follow the provisions of 5.4.2 of GB/T 28046.4-2011 to carry out 100 rapid temperature change tests. The holding time at low-temperature and high-temperature in each cycle is 60 min.

6.2 Exit-factory inspection

The exit-factory inspection items include sensor shape, marking, basic performance.

6.3 Type inspection

6.3.1 Several situations in which type inspection shall be carried out

The type inspection of the sensor is carried out in the following cases:

a) In case of trial production and type finalization of new sensor;

b) After formal production, in case of major changes in structure, materials and processes that affect sensor performance;

c) For batch or mass-produced sensors, not less than once every two years;

d) When the production of sensor is restored after suspension for more than one year;

e) When the exit-factory inspection result is significantly different from the previous type inspection result;

f) When the national quality supervision agency requests the type inspection.

6.3.2 Sampling and grouping

Samples for type inspection shall be taken from a batch of samples that have passed the exit-factory inspection; the number shall not be less than 18. It is first re-inspected according to the exit-factory inspection items. When the re-inspection is qualified, divide the samples evenly into 6 groups. Carry out test based on the following groups and item sequences:

a) Group 1: Temperature drift test, temperature test, temperature/humidity combined cycle test;

b) Group 2: Test of working voltage range, test of insulation withstanding voltage test, test of abnormal voltage, test of electromagnetic immunity, free fall test;

c) Group 3: Protection test, test of oil resistance;

d) Group 4: Test of mechanical shock;

e) Group 5: Vibration test;