公开(公告)号：US06995670B2

公开(公告)日：2006-02-07

申请号：US10728407

申请日：2003-12-05

申请人： David Wadlow ,  Frank Scholten ,  Ralph Giffone ,  Kenneth Gerenraich

发明人： David Wadlow ,  Frank Scholten ,  Ralph Giffone ,  Kenneth Gerenraich

IPC分类号： G08B13/26

CPC分类号： H03K17/955 ,  G01D5/24 ,  G08B13/26

摘要： A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase/frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency reference for the phase locked loop to follow and a phase delay circuit connected between the phase/frequency comparator and the voltage controlled oscillator causes the voltage controlled oscillator to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift between the fixed frequency and the operating frequency.

摘要翻译： 用于响应于由邻近物体的运动引起的电容变化率来控制装置的操作的电容式传感器系统包括设置在表面上的至少两个感测电极和锁相环，包括压控振荡器和相位 /频率比较器，连接在感测电极和RC网络之间，用于向感测电极提供工作频率。 包括参考振荡器的电路回路为锁相环提供固定的频率参考，并且连接在相/频比较器和压控振荡器之间的相位延迟电路使压控振荡器在参考振荡器之前运行 。 触发电路响应于固定频率和操作频率之间的相移的变化而提供控制输出。

公开(公告)号：US5284053A

公开(公告)日：1994-02-08

申请号：US819042

申请日：1992-01-10

申请人： David Wadlow ,  Lawrence M. Layden

发明人： David Wadlow ,  Lawrence M. Layden

IPC分类号： G01F1/08 ,  G01F1/80 ,  G01F1/90 ,  G01F15/02 ,  G05D7/06 ,  G01F1/05 ,  G01F1/34

CPC分类号： G05D7/0676 ,  G01F1/08 ,  G01F1/80 ,  G01F1/90 ,  G01F15/026

摘要： Apparatus and method for metering the flow rate of a fluid through a conduit in which a low inertia transducer is placed between the inlet and outlet, the transducer having a substantially cylindrical housing and a rotatable element concentric to the housing which together define an arcuate pathway for the flow of the fluid. A pressure sensor generates a pressure error signal corresponding to a change in pressure between the inlet and outlet and translates the same into a detectable signal which is used to change the speed of the rotatable element to reduce the differential pressure between the inlet and outlet.

摘要翻译： 用于计量流体通过导管的流量的装置和方法，其中低惯量换能器放置在入口和出口之间，换能器具有基本上圆柱形的壳体和与壳体同心的可旋转元件，它们共同限定弓形路径， 流体的流动。 压力传感器产生对应于入口和出口之间的压力变化的压力误差信号，并将其转换成可检测信号，该信号用于改变可旋转元件的速度以减小入口和出口之间的压差。

公开(公告)号：US06731209B2

公开(公告)日：2004-05-04

申请号：US10062866

申请日：2002-01-30

申请人： David Wadlow ,  Frank Scholten ,  Ralph Giffone ,  Kenneth Gerenraich

发明人： David Wadlow ,  Frank Scholten ,  Ralph Giffone ,  Kenneth Gerenraich

IPC分类号： G08B1326

CPC分类号： H03K17/955 ,  G01D5/24 ,  G08B13/26

摘要： A capacitive sensor system for controlling operation of a device in response to a rate of change in capacitance due to motion of a proximate object includes at least two sense electrodes disposed on a surface and a phase locked loop, including a voltage controlled oscillator and a phase/frequency comparator, connected between the sense electrodes and an RC network for providing an operating frequency to the sense electrodes. A circuit loop, including a reference oscillator, provides a fixed frequency reference for the phase locked loop to follow and a phase delay circuit connected between said phase/frequency comparator and said voltage controlled oscillator causes the voltage controlled oscillation to run ahead of the reference oscillator. A trigger circuit provides a control output in response to a change in phase shift between said fixed frequency and said operating frequency.

公开(公告)号：US4801209A

公开(公告)日：1989-01-31

申请号：US45336

申请日：1987-05-04

申请人： David Wadlow

发明人： David Wadlow

IPC分类号： G01N21/68 ,  G01N21/69

CPC分类号： G01N21/68 ,  G01N21/69

摘要： There is disclosed a visible emission spectrum generating assembly for a gaseous mixture comprising a chamber for receiving the gases to be analyzed, electrodes positioned externally about the chamber and longitudinally disposed with respect to one another, an rf energy source connected to the electrodes to establish a current therebetween for generating the visible emission spectra of the gaseous mixture to be analyzed and at least one photodetector device disposed proximate the chamber to receive the thus generated light or visible emission spectra. The process and apparatus of the present invention also include a data processing device for evaluating the spectral signals received by the photodetector device and suitable display and/or recording assemblies.

摘要翻译： 公开了一种用于气体混合物的可见发射光谱发生组件，其包括用于接收待分析气体的室，位于室周围并相对于彼此纵向设置的电极，连接到电极的rf能量源，以建立 用于产生要分析的气体混合物的可见发射光谱;以及至少一个设置在该室附近以接收由此产生的光或可见发射光谱的光电检测器件。 本发明的方法和装置还包括用于评估由光电检测器装置接收的光谱信号和合适的显示和/或记录组件的数据处理装置。