【作者】 吴刚； 李一博； 胡晓莉； 靳世久；

【Author】 Wu Gang Li Yibo Hu Xiaoli Jin Shijiu (State Key Lab. of Precision Measuring Technology & Instruments, Tianjin University,Tianjin 300072,China)

【机构】 天津大学精密测试技术与仪器国家重点实验室；

【摘要】 地面标记器是漏磁通法管道腐蚀缺损检测系统的重要组成部分。Honeywell公司的一维磁阻传感器HMC1021由于其高可靠性、高灵敏度、低成本、低功耗和小尺寸等特点成为地面标记器传感器的理想选择。而且它具有独特的置/复位功能,能有效消除因温度漂移和电路参数漂移等共模信号造成的影响。更多还原

【Abstract】 Above ground marker(AGM) is the significant part of magnetic flux leakage pipeline corrosion detection system. In the sensors used in that, MR sensor HMC1021 of Honeywell becomes the best choice, owing to its high reliability, high resolution, low cost, low power and small size. Moreover, the SET/RESET function of MR sensor can eliminate efficiently offset and temperature effects introduced by the electronics as well as the bridge temperature drift.更多还原