Studies On Method Of Multi- Displacement Monitoring System And Global Coordinate System Conversion In Particle Accelerators

With the continuous development of large Particle Accelerators, higher and higher alignment and installation accuracy had been required in the whole system. The position precision of key components is critical for the normal operation of the machine, which expounds that a variety of feasible position monitoring devices for real-time monitoring of ground settlement and the posture of components is highly necessary on the basis of prophase high accuracy alignment. According to the characteristics of Particle Accelerators, The perpendicular direction of the beamline, which is the direction of transversal has the greatest impact for the normal operation of beamline. Main of high accuracy position monitoring devices in Particle Accelerators are Hydrostatic Leveling System (HLS) and Wire Position Sensor (WPS).Currently, those devices had been mostly applied individually and they worked based on different benchmarks in the most large Particle Accelerators. The monitoring scope of the monitoring systems is limited at the same time. The data analysis also needs to be processed section by section to make the necessary adjustments after observations by entering the site field to determine the relationship among each components. These monitoring results cannot effectively reflect the displacement of parts or components in the global coordinate system, which leads to the abnormal operation of the entire machine because of partial adjustment. So the monitoring data would be reviewed by unified to the global coordinate system to transform relative position displacement to absolute position displacement.In the first, this paper introduces the measuring principle and sensor type and the applications of HLS and WPS to expound their advantages and limitations in future development by combining the research and development trends in world. Then this paper also introduces the calibration method of HLS and the calibration experiment of WPS.Secondly, this paper systematically expounds the aim, design method, structure design and manufacturing with five platform of Multi-System Displacement Monitoring System. Later tells the installation and debugging process of HLS, WPS, Inclination Sensor and SpotOn on the basis of installation of 5 platforms in the experiment room.Then, the establishment of multi-level space coordinate system and transformation methods has been expounded, including establishment and transformation method of Sensor coordinate system, Plate coordinate system and System coordinate system in the assistance of Laser Tracker and SA software, Which can obtain the conversion parameters by WPS data in real-time. All coordinate values data would be transformed to Global coordinate system in simulating second-level network.Finally, the measurement data of HLS and WPS would be compared combining with Inclination Sensor and SpotOn. Then the actual coordinate values data had been transformed from their Sensor coordinate system to the Global coordinate system.