Seven-screen Array Status Monitoring Technology

Both the impacting coordinates and the velocity of the flying projectile are the key parameters the weapons damage performance.And they are the essential parameters measured in the process of the range tests.The light-screen array measurement method has the advantages of new principle,high sensitivity,high accuracy.However,when using a light screen array to measure the flight velocity of a projectile in a vacuum environment,it is not possible to monitor the real-time working status of the light screen array due to the limitations imposed by the vacuum environment.In response to these issues,this paper conducts an in-depth analysis of the working principles of the light screen array.Building upon fault diagnosis technology,a fault tree for a seven-light screen array is established.By analyzing the composition and working principles of the light screen array,the specific causes of light screen array failures are identified.Real-time monitoring of the working status of the seven-light screen array is achieved by designing a fault monitoring circuit.The main research contents and achievements are summarized as follows:Overall scheme design: Based on the theory of fault tree analysis and considering the composition of the seven-light screen array,a comprehensive fault tree for the array is constructed.The functional requirements for monitoring the status of the seven-light screen array are analyzed,and the overall circuit design scheme is determined based on the technical indicators.Various functional modules are designed accordingly.Design and implementation of the light source working status monitoring module: The various modules of the light source status monitoring circuit for the seven-light screen array are designed.Real-time collection of the alignment voltage of the seven light screens is performed,and the values are displayed.The main modules include the system power supply module,embedded control module,communication circuit module,signal input and output module,and data display module.Design and implementation of the receiver device working status monitoring module:Based on the flight parameters of the projectile and the plane equations of the seven light screens,a seven-channel timing control circuit is designed.By calculating the timing control frequency and sequentially activating the flashing light sources according to the computed timing control,the state of the projectile passing through the light screen array is simulated.The designed circuit includes the power supply module,serial communication module,inverting drive module,and flashing circuit module.Design of the monitoring software: Upper computer software is designed to real-time collect the alignment voltage of the light screens and send control commands to the flashing circuit,thereby efficiently monitoring the working status of the seven-light screen array.Experimentation and validation: Experimental verification of the seven-light screen array state monitoring system is conducted.The designed monitoring hardware circuit achieves the monitoring function of the array’s working status while satisfying the technical requirements of the monitoring circuit.