Abstract: Flip-flow screens offer unique advantages for grading fine-grained materials. To address the problem of data inaccuracies monitoring caused by sensor quality vibration in the traditional contact measurement methods, this study constructed a non-invasive measurement system based on electrical and optical signals. A trajectory-tracking algorithm for the screen-body was developed to visually measure the kinematics of the screen-body. Employing the principle of laser-reflection distance measurements, optical measurements were performed on the kinematic information of the screen-plate. Based on WIFI and Bluetooth transmission of electrical signals, a tracer particle tracking technology was developed to electrically measure the kinematic information of mineral particles. Through the non-invasive measurement methods mentioned above, the intelligent fusion perception of kinematic information of the screening system's "screen-body, screen-plate, particle" has been achieved.