The Dynamic Test Method Of Distribution Performance For Vehicle Lamps Light

The application of distribution performance test on dynamic light plays a very important role in life. But the measurement accuracy of dynamic light needs to be improved.At present, the study on dynamic light test is insufficient, so the method of dynamic range adjustment is put forward. Dynamic gain adjustment and range interval control are used to complete the dynamic light illumination measurement. The light receiving device receives and converts light source signal, and the transformed signal is current signal. The operational amplifier external circuit is connected to Ⅰ/Ⅴ converting circuit through changing wiring method, the circuit can convert analog current signal into analog voltage signal. Different light sources interval corresponding different voltage value, the microprocessor will control multi-channel analog switch gives suitable gain amplification based on the size of the voltage. The analog voltage signal is input to the microprocessor after the second enlarge. In this way, the analog-to-digital conversion result is more close to the full range, and the measurement accuracy can be improved. After digital filtering, the digital signal is displayed on the display screen.51 Single-Chip Microcomputer is applied in this test system, and software of system is debugged under the kill environment. The experimental results show that the test system can meet the measurement accuracy, while the light intensity in the range from 0.01x to 2000 lx. The test system can finish the measurement of distribution performance for dynamic light.