| The ultrafast diagnose technique is the important detecting method in somescientific areas such as ICF (Inertial Confinement Fusion), synchron radicalization,X-ray laser physics， plasma physics, atomic physics, Z-pinch, photobiology,photochemistry, etc．The streak camera is an important tool for ultra-fast diagnose. Itis the highest time resolution camera of all high speed photography cameras. It is usedto some domains of ultra-fast diagnose. But in ICF the electromagnetic radiation ofworking environment is strongly, it’s bad for human health. In recent years,informatization and networking are developing, so the ICF diagnose system need toachieve centralized control.In order to make the staff away from the electromagnetic radiation environmentin which the streak camera is always, and to enable ICF diagnostic system withcentralized control, distributed control system is needed for control system design ofthe streak camera. In this control system, a Windows computer was selected as a host,and multiple P89LPC922MCU were selected as slaves. The former is to control theentire system and cooperates with the latter through RS-485serial port duplexcommunication, while the latter controls and monitors the streak camera through itsperipheral circuits. The software of host computer has friendly human-computerinterface, all monitor and control data can be displayed intuitively. The software ofslaves had been written differently according to their function. The software and thehardware of system have multiple anti-interference measures, include: photoelectricisolation, voltage follower, electromagnetic shielding box, watchdog, looptransmission and software trap.The system can remotely control the power switch of the streak camera, theelectrode voltage, the state of static or dynamic and sweep speed, and monitors ofpower and sweep state, the electrode voltage and environmental parameters. Since thesystem is a modular design, it can increase or decrease the items for controlling andmonitoring according to actual needs. At last, the function modules, the system jointregulation and the streak camera experiment verifies the feasibility of the control system. |
