EAST装置主支撑应变测量

Strain measured system of the main support structure of the EAST

EAST装置主体由真空室、极向场系统、纵场系统、冷屏、外真空杜瓦、主支撑等结构组成。装置主支撑(八个柱子)承担大约340t来自真空室、极向场系统、纵场系统、冷屏、外真空杜瓦等结构的重量,主支撑因而产生应变、应力,近而影响装置的水平度和稳定性,而装置的水平度和稳定性涉及到装置运行的稳定性和安全性。因此,需要检验主支撑的应力、应变以便及时校正。根据主支撑的理论应变大小和方向,通过分析和比较,采用电阻应变片和数据采集卡结合VisualBasic程序开发了应变测量系统。该系统与市场上零售的数据采集系统相比,具有针对性强,费用低等优点。

EAST(Experimental Advanced Superconducting Tokamak) is maked up of vacuum vessel, the superconducting poloidal field, toroidal field, the thermal shields, the cryostate and the main support. The main support structure of the EAST superconducting Tokamak (8 pillars) is used for supporting the weight about 340 tons of vacuum vessel, the superconducting poloidal field, toroidal field, the thermal shields, the cryostate etc. Strain and stress landed on the main support therefore affect its horizontal height and stability. While horizontal height and stability of apparatus affect its safety and stability when it is running, it needs something to test its strain and stress so as to adjust it timely. Based on the theoretic value and direction of strain of main support, a measure system of strain is exploited by using resistance strain gauge and the data acquire, through analysis and comparison, and with a software——Visual Basic The system has the advantages of low cost and good pertinency compared with the data acquire system sold in market.