公开(公告)号：US06805009B2

公开(公告)日：2004-10-19

申请号：US10470340

申请日：2003-07-28

申请人： James Stonehouse Burdess ,  Calum Jack McNeil

发明人： James Stonehouse Burdess ,  Calum Jack McNeil

IPC分类号： G01H1300

CPC分类号： G01N29/12 ,  G01M3/16 ,  G01N29/022 ,  G01N29/036 ,  G01N2291/014 ,  G01N2291/0255 ,  G01N2291/0256 ,  G01N2291/101

摘要： A resonant sensor for determining structural property changes, in particular for detecting the presence of chemical or biological species, comprises a structure (2) mounted to be capable of resonating and having a cyclically symmetrical configuration with two independent degenerative modes of vibration of a common natural frequency (f), and means (24,26,28,30,32,34,36,38) for exciting the structure (2) to resonate according to the two degenerative modes, regions (8,12,16,20) of the structure (2) being modified such that, on changes in the structural properties of the modified regions (8,12,16,20), for example by the addition or subtraction of mass, the natural frequencies (f1, f2) of the two modes of vibration become different, the difference in frequencies (?f) being proportional to the change in structural properties.

摘要翻译： 用于确定结构特性变化的谐振传感器，特别是用于检测化学或生物物质的存在，包括安装成能够谐振并具有周期性对称构型的结构（2），其具有两种独立的退化模式的共同天然 频率（f）和用于激励结构（2）根据两个退化模式共振的装置（24,26,28,30,32,34,36,38），区域（8,12,16,20） 所述结构（2）被修改为使得在修改的区域（8,12,16,20）的结构特性的改变上，例如通过加或减质量，固有频率（f1，f2）为 两种振动模式变得不同，频率差（Δf）与结构特性的变化成正比。

公开(公告)号：US06472792B1

公开(公告)日：2002-10-29

申请号：US09743325

申请日：2001-03-05

申请人： Alan G. Jack ,  Barrie Mecrow ,  John Terence Evans ,  James Stonehouse Burdess ,  John Neville Fawcett ,  Dawn Stephenson ,  Phillip George Dickinson

发明人： Alan G. Jack ,  Barrie Mecrow ,  John Terence Evans ,  James Stonehouse Burdess ,  John Neville Fawcett ,  Dawn Stephenson ,  Phillip George Dickinson

IPC分类号： H02K112

CPC分类号： H02K1/148 ,  H02K1/08

摘要： A stator core for an electrical machine includes an annular yoke and a plurality of teeth spaced circumferentially on the annular yoke and extending radially therefrom, the spaces between the teeth defining circumferentially spaced winding slots. The teeth are formed as separate components from a soft magnetic powder material. Each tooth has non-decreasing cross-sectional dimensions in a direction towards a distal tip along a length of the tooth corresponding to a winding slot, and has the same or smaller cross-sectional dimensions along a proximal end of the tooth. Thereby, the tooth may be assembled with a core-back section of the annular yoke and is able to receive a coil before the assembling with the yoke.

摘要翻译： 用于电机的定子芯包括环形磁轭和在环形磁轭上周向间隔开并从其径向延伸的多个齿，齿之间的空间限定周向间隔开的绕组槽。 齿形成为与软磁粉末材料分离的部件。 每个齿在沿着与卷绕槽对应的齿的长度方向朝向远端尖端的方向上具有非减小的横截面尺寸，并且沿着牙齿的近端具有相同或更小的横截面尺寸。 因此，齿可以与环形轭的芯背部分组装，并且能够在与轭组装之前接收线圈。