新型磁传感器理论及其在钢板缺陷检测的应用  

Theory on New Magnetic Sensor and Its Application in Steel Plate Flaw Detection

作　　者：闻凤连[1] 鲍丙豪[1] 王军龙[1] 张向珂[1] 赵洪利[1] 

机构地区：[1]江苏大学机械工程学院测控技术与仪器系,江苏镇江212013

出　　处：《仪表技术与传感器》2010年第2期70-72,共3页Instrument Technique and Sensor

基　　金：江苏大学高级人才专项基金(03JDG2012);安徽省自然科学基金(01042309);安徽省高校中青年学科带头人基金

摘　　要：提出了非晶丝单磁芯双绕组结构,多谐振荡桥路励磁的新型磁场检测传感器,并建立了传感器的理论模型,在电路的时间常数远小于振荡周期的条件下给出了桥路输出信号与被测磁场及电路参数、磁芯参数间的定量关系,并通过实验验证了在一定范围内理论结果与实验结果非常接近。利用该传感器设计了钢板缺陷检测系统,结果表明它可检测微小缺陷,具有灵敏度高、体积小和成本低等特点。A new type of single-core and double-winding magnetic sensor based on amorphous wire with nominal composition CoT0.4Fe4.6SilsB10 using multi-vibrator bridge as its basic circuit was presented. The theoretical model of the sensor was estab-lished. On the condition that the time constant of the circuit was far less than signal period, the relations among output signal of the bridge, detected magnetic field, circuit component parameters, the magnetic parameter were received. And the results show that the experimental data was in good accordance with the theoretical prediction when Rt was between 5 11 and 20 Ω. Then, a magnetic flux leakage system based on the sensor for steel plate flaw detection was developed, and experimental results prove the sensor can detect small flaw on steel plate, with the advantages of high sensitivity, small bulk and low cost.

关 键 词：磁场传感器 非晶态合金丝 电磁参数 漏磁检测 钢板缺陷 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]