Research On LIBS Carbon Acquisition System Monitoring Method Based On Image Recognition

The real-time monitoring of the changes in the content of elements in the alloy during the smelting process and the adjustment of the control process of the smelting furnace are of great significance for improving the metallurgical production efficiency and product quality.LIBS online monitoring technology has been widely used in many fields due to its advantages in real-time,in-situ and non-contact detection,however,when LIBS online monitoring technology is used,laser instability will occur,which will affect the measurement results and the accuracy of monitoring.Through the study,it is found that there is a correlation between the plasma shape parameters and the relative intensity of the laser,the use of this relationship to monitor the stability of the laser can improve the measurement accuracy of the elements and make LIBS technology more popular in the field of re-metallurgy.This article first describes the technological background and domestic and foreign research status of LIBS in the metallurgical process.Secondly,the overall design of the experimental system is introduced.The plasma image acquisition device is introduced.The experimental equipment and samples are selected.The overall structure of the experimental system is set up.The corresponding hardware circuit design of the laser power acquisition system is performed.Then the software needed for the experimental system was designed.The image was segmented and extracted using image recognition.The plasma spot image analysis software was written in C language to meet the requirements of the study,and the plasma pattern in the image was obtained.Calculate the area of the plasma and display the monitoring data online in real time through the design software interface.Finally,in accordance with the requirements of the research experiment,plasma images of three kinds of ferrochromium alloy materials were collected to calculate the area of the plasma.The laser power acquisition equipment was used to obtain the relative intensity data of the carbon spectrum at the same time,and the area of the chromium and the plasma area of the carbon were measured.The relative intensity data of the lines are compared and the relationship is established.It can be concluded that the stability of the laser can be monitored in real time using the change of the plasma area,and the measured carbon value during this time is more accurate.