公开(公告)号：US20150297094A1

公开(公告)日：2015-10-22

申请号：US14602105

申请日：2015-01-21

申请人： Millar Instruments Limited

发明人： Simon Charles Malpas ,  David Mortimer Budgett ,  Therese Clark

IPC分类号： A61B5/01 ,  A61B5/00 ,  A61B5/03

CPC分类号： A61B5/01 ,  A61B5/031 ,  A61B5/6852 ,  A61B5/686 ,  A61B2560/0242 ,  A61B2560/0266 ,  A61B2562/06 ,  A61M27/006 ,  A61M2025/09166

摘要： A method for determining a flow rate of a substance in an environment includes positioning a device having a balanced circuit in or on an object or within a particular environment, wherein the balanced circuit comprises elements which are operationally sensitive to changes in a parameter of the object or the environment. The method further includes measuring a common mode signal of the balanced circuit and determining, from the common mode signal, a value of the flow rate. An exemplary implementation of the method includes determining temperature using a resistive sensor having a Wheatstone bridge circuit with two variable resistors and two fixed resistors. Embodiments of systems and devices configured to employ such methods are provided, particularly medical probes, electronic signal monitoring devices, and systems employing such devices.

摘要翻译： 一种用于确定环境中物质的流速的方法包括将具有平衡电路的装置定位在物体中或物体上或特定环境内，其中平衡电路包括对物体的参数变化操作敏感的元件 或环境。 该方法还包括测量平衡电路的共模信号，并根据共模信号确定流量的值。 该方法的示例性实现包括使用具有带有两个可变电阻器和两个固定电阻器的惠斯通电桥电路的电阻式传感器来确定温度。 提供了被配置为采用这种方法的系统和设备的实施例，特别是医疗探针，电子信号监控设备和采用这种设备的系统。

公开(公告)号：US3748623A

公开(公告)日：1973-07-24

申请号：US3748623D

申请日：1972-07-25

申请人： MILLAR INSTRUMENTS

发明人： MILLAR H

IPC分类号： A61B5/0215 ,  G01L9/00 ,  G01L1/22

CPC分类号： A61B5/0215 ,  A61B2562/0247 ,  A61B2562/0261 ,  A61M2025/0002 ,  G01L9/0052

摘要： A novel miniature blood pressure transducer is described including a catheter tip transducer implantable in an artery or vein. The transducer employs a novel strain gauge for converting blood pressure pulsations into measurable electrical signals. The strain gauge is formed of two strain sensitive elements composed of a piezoresistive material. The strain occurring in each element is concentrated in separate reduced neck portions. The reduced neck portions are substantially parallel to each other and are of substantially the same dimension. Force supplied to the strain gauge results in placing one reduced neck portion in tension while placing the other reduced neck portion in compression.

摘要翻译： 描述了一种新颖的微型血压传感器，其包括可植入动脉或静脉的导管尖端换能器。 传感器采用新型应变计，将血压脉动转换为可测量的电信号。 应变计由两个由压阻材料组成的应变敏感元件形成。 发生在每个元件中的应变集中在分开的减少的颈部中。 减小的颈部基本上彼此平行并且具有基本上相同的尺寸。 供应到应变计的力导致将一个减小的颈部部分放置在张力中，同时将另一个减小的颈部部分压缩。

公开(公告)号：US3724274A

公开(公告)日：1973-04-03

申请号：US3724274D

申请日：1971-02-11

申请人： MILLAR INSTRUMENTS

发明人： MILLAR H

IPC分类号： A61B5/0215 ,  G01L9/00 ,  G01L9/02 ,  A61B5/02

CPC分类号： A61B5/0215 ,  A61B2562/0247 ,  A61B2562/0261 ,  G01L9/0052

摘要： A unique pressure transducer is disclosed which has particular application in making physiological measurements such as intraarterial or intra-venous blood pressure measurements. The transducer employs the principle of a cantilever beam which is exposed directly to the source of pressure. The pressure applied to the cantilever beam causes flexure which is measured by a strain gauge, or other means for measuring its deformation, and a related electrical signal is produced.

摘要翻译： 公开了一种独特的压力传感器，其特别应用于进行生理测量，例如动脉内或静脉内血压测量。 传感器采用直接暴露于压力源的悬臂梁的原理。 施加到悬臂梁上的压力导致由应变计或用于测量其变形的其他装置测量的挠曲，并且产生相关的电信号。