公开(公告)号：US06910384B2

公开(公告)日：2005-06-28

申请号：US10472601

申请日：2002-03-20

申请人： George Jiri Tomka ,  Jonathan Geoffrey Gore ,  Mark Gregory Maylin ,  James Carl Milne

发明人： George Jiri Tomka ,  Jonathan Geoffrey Gore ,  Mark Gregory Maylin ,  James Carl Milne

IPC分类号： G01L1/00 ,  G01L1/12 ,  G01L5/00 ,  G01L17/00 ,  G01M5/00 ,  G01B7/16

CPC分类号： G01M5/0083 ,  G01L1/125 ,  G01M5/0008 ,  G01M5/0016 ,  G01M5/0041 ,  G01M5/0091

摘要： A stress or magnetic field sensor comprising a generally elongate magnetically soft amorphous or nanocrystalline electrically resistive element and biasing means for applying to the element a bias magnetic field of which the component directed along the length of the sensor has an amplitude variation pattern along the element. A periodically varying pattern has the effect of reducing the sensitivity of a stress sensor to external ambient fields (FIG. 3 shows that with a sawtooth bias field the sensitive portions a of a sensor move to positions b in the presence of an ambient field, but their number remains the same). A ramped bias field enables the position of the sensitive region of the sensor to be controlled, for measuring local stress, or for mapping an external magnetic field. Control of the regions where the sensor is active may include selective conductive coating of portions of its length. Potential uses of the stress sensor include a pressure sensor, embedment in moving parts (using rf communication) such as vehicle tyres, aircraft wings or machine parts, and in structures such as bridges where stray magnetic fields are a problem.

摘要翻译： 应力或磁场传感器包括大体上细长的软磁性无定形或纳米晶体电阻元件和用于向元件施加偏置磁场的偏置装置，偏置磁场沿着传感器长度方向引导的偏磁场具有沿元件的幅度变化图案。 周期性变化的模式具有降低应力传感器对外部环境场的灵敏度的效果（图3示出了通过锯齿偏置场，传感器的敏感部分a在存在环境场的情况下移动到位置b，但是 他们的数字保持不变）。 斜坡偏置场可以控制传感器的敏感区域的位置，用于测量局部应力或用于映射外部磁场。 对传感器有效的区域的控制可以包括其长度部分的选择性导电涂层。 压力传感器的潜在应用包括压力传感器，嵌入在诸如车辆轮胎，飞机机翼或机器部件的运动部件（使用rf通信）中，以及在诸如杂散磁场是问题的桥梁的结构中。