公开(公告)号：US20100055801A1

公开(公告)日：2010-03-04

申请号：US12198580

申请日：2008-08-26

申请人： Dechang Yi ,  Lawrence R. Senesac ,  Thomas G. Thundat

发明人： Dechang Yi ,  Lawrence R. Senesac ,  Thomas G. Thundat

IPC分类号： G01N27/04 ,  G01N33/22 ,  G01N25/20

CPC分类号： G01N27/18

摘要： A sensor for detecting and differentiating chemical analytes includes a microscale body having a first end and a second end and a surface between the ends for adsorbing a chemical analyte. The surface includes at least one conductive heating track for heating the chemical analyte and also a conductive response track, which is electrically isolated from the heating track, for producing a thermal response signal from the chemical analyte. The heating track is electrically connected with a voltage source and the response track is electrically connected with a signal recorder. The microscale body is restrained at the first end and the second end and is substantially isolated from its surroundings therebetween, thus having a bridge configuration.

摘要翻译： 用于检测和分化化学分析物的传感器包括具有第一端和第二端的微型体，以及用于吸附化学分析物的端部之间的表面。 表面包括用于加热化学分析物的至少一个导电加热轨道以及与加热轨迹电隔离的导电响应轨迹，用于产生来自化学分析物的热响应信号。 加热轨道与电压源电连接，并且响应轨道与信号记录器电连接。 微型体在第一端和第二端处被约束，并且与它们之间的环境基本隔离，因此具有桥接构造。

公开(公告)号：US07972865B2

公开(公告)日：2011-07-05

申请号：US12198580

申请日：2008-08-26

申请人： Dechang Yi ,  Lawrence R. Senesac ,  Thomas G. Thundat

发明人： Dechang Yi ,  Lawrence R. Senesac ,  Thomas G. Thundat

IPC分类号： G01N27/04 ,  G01N33/22

CPC分类号： G01N27/18

摘要： A sensor for detecting and differentiating chemical analytes includes a microscale body having a first end and a second end and a surface between the ends for adsorbing a chemical analyte. The surface includes at least one conductive heating track for heating the chemical analyte and also a conductive response track, which is electrically isolated from the heating track, for producing a thermal response signal from the chemical analyte. The heating track is electrically connected with a voltage source and the response track is electrically connected with a signal recorder. The microscale body is restrained at the first end and the second end and is substantially isolated from its surroundings therebetween, thus having a bridge configuration.

摘要翻译： 用于检测和分化化学分析物的传感器包括具有第一端和第二端的微型体，以及用于吸附化学分析物的端部之间的表面。 表面包括用于加热化学分析物的至少一个导电加热轨道以及与加热轨迹电隔离的导电响应轨迹，用于产生来自化学分析物的热响应信号。 加热轨道与电压源电连接，并且响应轨道与信号记录器电连接。 微型体在第一端和第二端处被约束，并且与它们之间的环境基本隔离，因此具有桥接构造。

公开(公告)号：US20060032289A1

公开(公告)日：2006-02-16

申请号：US11052556

申请日：2005-02-07

申请人： Lal Pinnaduwage ,  Dechang Yi ,  Thomas Thundat ,  John Hawk

发明人： Lal Pinnaduwage ,  Dechang Yi ,  Thomas Thundat ,  John Hawk

IPC分类号： G01N27/14

CPC分类号： G01N29/036 ,  G01N33/0057 ,  G01N2291/0256

摘要： A two-track piezoresistive cantilever detects explosives in ambient air by measuring resistance changes in the cantilever when one piezoresistive track is pulse heated to cause deflagration of explosive adhered to the surface of the cantilever. The resistance measurement is through the second piezoresistive track, which is located at the most resistance-sensitive area. The resistance change of this track is caused by the temperature change of the cantilever as well as the bending of the cantilever due to bi-material thermal expansion. The detecting method using this novel cantilever avoids the use of any optical components such as a laser and position sensing detector (PSD), which are necessary in traditional detecting systems using cantilevers. Therefore, it can extremely reduce the complexity of the detecting system and make a portable chemical detection system possible that is small, less expensive, and able to be mass produced and is particularly useful for the detection of explosives.

摘要翻译： 双轨压阻悬臂通过测量一个压阻磁道被脉冲加热时的悬臂梁的电阻变化来检测环境空气中的爆炸物，从而引起附着在悬臂表面的爆炸物爆燃。 电阻测量是通过位于最电阻敏感区域的第二压阻磁道。 该轨道的电阻变化是由于悬臂的温度变化以及由于双材料热膨胀引起的悬臂的弯曲引起的。 使用这种新颖的悬臂的检测方法避免使用诸如激光和位置感测检测器（PSD）的任何光学部件，这在使用悬臂的传统检测系统中是必需的。 因此，能够极大地降低检测系统的复杂性，使便携式化学检测系统成本小，成本低廉，能够批量生产，对爆炸物的检测特别有用。