Research and Development of Gasoline Direct Injection Image Acquisition System

Abstract

Both industry standards and international standards in the field of automobiles recommend the image test method to detect the spray performance of the fuel injector. It is necessary to accurately determine the time when the fuel injector starts spraying and capture the spray image at the standard time for analysis. An injector spray image acquisition system based on photoelectric detection technology is proposed. The infrared photoelectric sensor is used to determine the initial starting time of the injector. The FPGA chip receives the trigger signal of the photoelectric sensor and then sends driving pulses to the industrial camera in the external trigger acquisition mode to realize spray image acquisition. Then, it is transmitted to the upper computer through gigabit network interface for subsequent image processing. The experimental results show that the system has stable performance and high quality of collected images, fully meets the high precision requirements of spray detection, and can be extended to droplet velocity measurement and other fields.