公开(公告)号：EP2284478A1

公开(公告)日：2011-02-16

申请号：EP10251315.7

申请日：2010-07-23

申请人： Oxford RF Sensors Ltd

发明人： Harrison, Martin Roy ,  Wherritt, Peter ,  Gregg, John Francis

IPC分类号： G01B7/14

CPC分类号： G01B7/14 ,  F01D11/20 ,  F01D17/02

摘要： Proximity sensor 10 for detecting the proximity of a conductive component 40 comprising an oscillator having electrical properties and arranged to provide an oscillating signal. First coil 20 arranged to receive the oscillating signal and alter the electrical properties of the oscillator by a first variation in response to the proximity of the conductive component to the proximity sensor. Second coil 30 arranged to receive the oscillating signal and alter the electrical properties of the oscillator by a second variation in response to the proximity of the conductive component 40 to the proximity sensor, wherein the first coil 20 and the second coil 30 cause a different variation to the electrical properties of the oscillator for the same proximity of the conductive component 40 to the proximity sensor 10. Proximity output arranged to provide a proximity signal which varies in dependence upon the proximity of the conductive component 40 to the proximity sensor and based on a comparison of the first variation to the second variation.

摘要翻译： 接近传感器10，用于检测导电部件40的接近度，导电部件40包括具有电性能的振荡器，并被布置成提供振荡信号。 第一线圈20被布置成响应于导电部件与接近传感器的接近而通过第一变化来接收振荡信号并改变振荡器的电特性。 第二线圈30被布置成响应于导电部件40与接近传感器的接近而通过第二变化来接收振荡信号并改变振荡器的电特性，其中第一线圈20和第二线圈30产生不同的变化 涉及用于导电部件40到接近传感器10相同接近的振荡器的电气特性。接近输出被布置成提供接近信号，该接近信号根据导电部件40与接近传感器的接近度而变化，并且基于 第一个变化与第二个变化的比较。

公开(公告)号：EP2574735A1

公开(公告)日：2013-04-03

申请号：EP12186718.8

申请日：2012-09-28

申请人： Oxford RF Sensors Ltd

发明人： Karenowska, Alexy Davison ,  Wherritt, Peter ,  Harrison, Martin Roy ,  Gregg, John Francis

IPC分类号： F01D21/00 ,  G01B7/14 ,  H03K17/95

CPC分类号： F01D21/003 ,  F01D21/04 ,  F05D2260/80 ,  F05D2270/804 ,  G01B7/14 ,  H03K17/9545 ,  H03K2017/9527

摘要： Target sensor comprising: sensor probe having a resonance frequency that changes as the separation of the sensor probe and a target changes. Oscillator arranged to apply a radio frequency (RF) signal to the sensor probe, the oscillator having: control circuitry configured to regulate the frequency of the RF signal applied to the sensor probe to below the resonance frequency of the sensor probe. Detector arranged to detect an electrical characteristic of the oscillator that varies with the impedance of the sensor probe indicating an interaction of the sensor probe with the target.

摘要翻译： 目标传感器包括：传感器探头，其具有随着传感器探针和目标的分离改变而改变的共振频率。 振荡器被布置为向传感器探针施加射频（RF）信号，振荡器具有：控制电路，其被配置为将施加到传感器探针的RF信号的频率调节到传感器探头的谐振频率以下。 检测器被布置成检测振荡器的电特性，其随传感器探头的阻抗指示传感器探头与目标的相互作用而变化。