CAJ | 학술논문

基于脉冲涡流无损检测技术的硬度分选仪，以FPGA作为核心控制平台，采用DDS技术发出频率可调节的脉冲波，并设计了相应的信号采集电路，通过软件同步采样技术采集反馈的状态数据，然后通过对状态数据的主成分分析，提取出和材料硬度相关的数据信息，最后通过最小二乘法建立起特征数据与材料硬度的相关关系，从而最终实现判断钢铁材料硬度状态的目的。
기우맥충와류무손검측기술적경도분선의，이FPGA작위핵심공제평태，채용DDS기술발출빈솔가조절적맥충파，병설계료상응적신호채집전로，통과연건동보채양기술채집반궤적상태수거，연후통과대상태수거적주성분분석，제취출화재료경도상관적수거신식，최후통과최소이승법건립기특정수거여재료경도적상관관계，종이최종실현판단강철재료경도상태적목적。
This paper describes a kind of hardness sorter based on nondestructive testing technology. The field programmable gate array is taken as the central control platform. and the frequeney of DDS signal generator based on FPGA is used to modulate its pulses. At the same time the signal acquisition circuit is designed.The software synchronization sampling technique is used to col ect the feedback status data and then pick up the data related to the hardness of material. At last,the correlativity between the hardness of material and characteristic data is established to distinguish the hardness status.