| Nuclear fusion has great potential and research value as a kind of energy utilization method with huge energy,but it can not achieve controlled nuclear fusion due to the failure to solve the particle confinement problem during fusion.The Galatea device is a non-tokamak-type magnetic confinement device that uses a magnetic field to confine the plasma generated by fusion.In order to better study the Galatea device and construct its monitoring system to monitor the dynamic changes of relevant parameters in the device,further analysis based on this is of great significance for the study of magnetic restraint devices.Real-time monitoring system for the Galatea device is established.First,the overall structure of the Galatea device is modeled,the structure of each part of the device and its operating principle are analyzed,and the relevant parameters of each part of the device are clarified.Completed the overall design of the monitoring system.The technical indicators of the device are clearly monitored based on the parameters of the device operation and the demand analysis is performed.The structure and specifications of the magnetic probe and the Langmuir probe designed for the parameter monitoring of the Galatea device are designed.The measurement principle of the two probes is theoretically analyzed to determine the placement position of the two probes.The conditioning circuit was designed at the same time.Secondly,the sampling start time of single signal is analyzed,and the possibility of time-division interleaving sampling in the device is demonstrated.The interleaved sampling trigger pulse is designed and the software and hardware components of the interleaved sampling and the signal input mode are designed.The reconstruction model of the interlaced sampling signal is established,and the signal is reconstructed by the improved regularized curve fitting method.Interleaved sampling and reconstruction of the plasma signal is achieved.Then,combined with the noise characteristics of the Galatea device,the existing filtering algorithm for the probe signal of the Galatea device is analyzed,and a real-time EMD-UKF composite filtering algorithm suitable for real-time monitoring system is proposed.The principle of EMD and UKF algorithm is analyzed,and the composite filtering algorithm is designed based on this principle.The problems of endpoint effect and modal aliasing appearing in EMD decomposition are improved.At the same time,the UKF algorithm is improved and its stability is improved.The improved algorithm is verified by simulation analysis.Finally,The overvoltage and overcurrent protection modules are designed.At the same time,the software part of the whole monitoring system is designed based on UML,and the LabVIEW implementation of the upper part of the monitoring system is implemented.Build user login system to achieve permission control and operation protection.The parameter setting and the acquisition system are established to collect the original current and voltage signals in the device,and the plasma-related parameters with research significance are obtained by the upper computer processing.The design database interface connects the monitoring system with the database,and builds a host computer interface to visually display the monitoring results.The separation of the monitoring operation and the installation environment is achieved by the remote operation module.Functional verification of the entire monitoring system proves that it should have relevant functions as a real-time monitoring system. |
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