电磁涡流无损探伤中探头位置检测装置  

Probe Position Detection Device in Electromagnetic Eddy Current NDT

作　　者：李林凯[1] 蹇兴亮[1] 边晓东[1] 吴昊[1] 张广琦[1] 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《仪表技术与传感器》2015年第1期34-37,共4页Instrument Technique and Sensor

基　　金：江苏省自然科学基金资助项目(BK2011653);江苏省高等学校大学生实践创新训练计划资助项目(JSS1238)

摘　　要：设计了一种电磁涡流无损探伤中探头位置检测装置,利用探头本身的电磁性质,在探头周围放置探头位置检测装置,再通过单片机进行计算,从而进行准确的定位。探头位置检测装置采用了4个位置传感器(4个线圈),用C8051F005单片机的DAC产生正弦波输出到探头线圈中,探头在空间内就会产生磁场,激励4个位置传感器产生感应电动势,再通过自动增益控制(AGC)电路放大和精密整流电路整流后,由C8051F005单片机ADC采样运算处理,算出探头的坐标位置。This paper designed a probe position detection device in the electromagnetic eddy current NDT,using the probe itself has the nature of the electromagnetic. The probe was placed around the probe position detection device,then use single-chip microcomputer to calculate its accurate position. The probe detection device adopted four position sensors（four coils）,with C8051F005 MCU DAC producing sine wave output to the probe coil. Probe in space can produce a magnetic field excitation for four position sensors to produce induced electromotive force. Then by the C8051F005 MCU ADC sampling processing after the rectification of AGC circuit and precision rectifier circuit,the coordinates of probe can be calculated.

关 键 词：探头位置 C8051F005 位置传感器 电磁场 正弦波 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]