Research On Synchronized Triggering Technology For Large-area Bursting Point Measurement

In intersection measuring bursting point using the area array camera,the high-speed camera is often used to uninterruptedly shoot manner,and it generates a large amount of redundant data,increases the workload of data processing,occupies too much storage space,reduces efficiency of system work,and even affects the measurement accuracy of bursting point coordinates.To solve the above problems,a trigger method based on image detection is proposed in this thesis.Real-time detection of acquired images.When recogniting the bursting point,a trigger signal is output,and the image capture card is triggered to store the effective image.This can reduce redundant data generation.Content of this thesis is as follows:1)The working principle of distributed measurement in off-site test environment is studied,the bursting point measurement system is constructed,it consists of image data transmission module,target analysis processing module and synchronous trigger module.The general scheme of system are designed respectively in detail,and the equipment selection of each module is completed;2)The hardware experiment platform is developed,the hardware circuit for trigger system is designed,and the available of the image transmitte through Camera Link is analyzed,the hardware circuit of trigger module based on FPGA(Field-Programmable Gate Array)is designed;3)The image processing algorithms for preprocessing and recognition of moving targets are studied respectively.An image recognition algorithm for the characteristics of bursting light is proposed.The algorithm flow of the bursting trigger is designed.Through bursting point test and threshold algorithm,an optimal threshold for bursting point triggering is choosed;4)The inage is detected and processed in real time before the image data is transmitted to the capture card.The intermal logic module of the FPGA trigger module is compiled,and the design of modules,such as image receiving and sending,inage buffering and image detection algorithms,are completed.The functions,interface definitions and implementation process of each module are described respectively in detail;Finally,the internal logic program is adjusted and optimized through simulation of the trigger module circuit module and the comprehensive debugging of the circuit system.Through simulations,the design achieve the desired goal,and the function of outputting the trigger signal when detecting the image of the bursting point is realized,which effectively reducing the generation of data redundancy and improves the efficiency of bursting point measurement.