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1. 发明授权

US06654470B1 Frequency warping for improving resonator signal-to-noise ratio 有权
标题翻译：用于提高谐振器信噪比的频率翘曲
公开(公告)号：US06654470B1
公开(公告)日：2003-11-25
申请号：US09352730
申请日：1999-07-13
申请人： John P. Dilger , Guojun Liu
发明人： John P. Dilger , Guojun Liu
IPC分类号： H04B1500
CPC分类号： G01N29/36 , G01N29/022 , G01N29/34 , G01N29/42 , G01N2291/014 , G01N2291/0256 , G01N2291/0422 , G01N2291/0426
摘要： A sensor circuit for use in measuring concentrations of an analyte in a fluid is comprised of a BAW sensor, a voltage variable capacitor connected to the sensor, an input which supplies a bias warping dc voltage to the voltage variable capacitor, and a resonant oscillator circuit. The resonant oscillator circuit detects the fundamental frequency of the sensor and produces a resonant signal frequency. The bias warping dc voltage applied to the voltage variable capacitor warps the resonant frequency of the circuit away from inharmonic noise.
摘要翻译：用于测量流体中分析物浓度的传感器电路由BAW传感器，连接到传感器的电压可变电容器，向电压可变电容器提供偏置翘曲直流电压的输入端以及谐振振荡器电路。谐振振荡电路检测传感器的基频并产生谐振信号频率。施加到电压可变电容器的偏压扭曲直流电压使电路的谐振频率远离非谐波噪声。

2. 发明授权

US06222366B1 High frequency measuring circuit with inherent noise reduction for resonating chemical sensors 有权
标题翻译：具有谐振化学传感器固有降噪功能的高频测量电路
公开(公告)号：US06222366B1
公开(公告)日：2001-04-24
申请号：US09310008
申请日：1999-05-10
申请人： John P. Dilger
发明人： John P. Dilger
IPC分类号： G01V300
CPC分类号： G01N29/022 , G01G3/13 , G01N2291/014 , G01N2291/0222 , G01N2291/0256 , G01N2291/02809 , G01N2291/0426
摘要： The concentration of an analyte in a fluid is measured by a quartz crystal microbalance sensor device in the fluid containing a concentration of the analyte. The sensor device exhibits a resonant frequency representative of the concentration of the analyte in the fluid. A quartz crystal microbalance reference device has a resonant frequency lower, by a predetermined amount, than the initial resonant frequency of the sensor device before the sensor device is exposed to the analyte. A signal is derived based on the difference of the resonant frequencies of the sensor and the reference device, and a first counter counts a predetermined number of cycles of the difference signal frequency to derive a sample time period. A second counter counts cycles of a clock signal frequency during the sample time period to derive a count representative of the difference signal frequency.
摘要翻译：流体中分析物的浓度通过石英晶体微量天平传感器装置在含有分析物浓度的流体中测量。传感器装置表现出代表流体中分析物浓度的共振频率。在传感器装置暴露于分析物之前，石英晶体微量天平参考装置的谐振频率比传感器装置的初始谐振频率低预定量。基于传感器和参考装置的谐振频率的差异导出信号，并且第一计数器对差分信号频率的预定数量的周期进行计数以导出采样时间段。第二计数器在采样时间段期间计数时钟信号频率的周期，以导出表示差信号频率的计数。

3. 发明授权

US06879936B2 Diagnostic apparatus and methods for a chemical detection system 有权
标题翻译：用于化学检测系统的诊断装置和方法
公开(公告)号：US06879936B2
公开(公告)日：2005-04-12
申请号：US10042979
申请日：2002-01-09
申请人： John P. Dilger
发明人： John P. Dilger
IPC分类号： G01N35/00 , G01N5/02 , G01N33/00 , G01N1/00
CPC分类号： G01N33/007
摘要： A chemical detection system performs controlled exposures to diagnose the pneumatic components and chemical sensors prior to measuring a chemical emission. A control module provides the system control and data processing to perform the diagnosis. The control module manipulates an emission sample retrieval system to provide precise exposure during the diagnostic routines. A sensor interface circuit interrogates the chemical sensors and stores the data for analysis. The chemical sensor exhibits predictable changes in response during predetermined exposure scenarios. By utilizing numerous time domain signal processing techniques, both system and sensor level fault conditions are determined.
摘要翻译：在测量化学物质排放之前，化学检测系统执行受控曝光以诊断气动元件和化学传感器。控制模块提供系统控制和数据处理以执行诊断。控制模块操纵排放样本检索系统，以在诊断程序期间提供精确的曝光。传感器接口电路询问化学传感器并存储数据进行分析。化学传感器在预定的曝光情况下表现出可预测的响应变化。通过利用大量时域信号处理技术，确定系统和传感器级故障条件。

4. 发明授权

US06536469B2 Self-centering magnet assembly for use in a linear travel measurement device 有权
公开(公告)号：US06536469B2
公开(公告)日：2003-03-25
申请号：US09761427
申请日：2001-01-16
申请人： John P. Dilger , Donald P. Pepperling , Nile K. Dielschneider , James C. Hawkins , David E. Woollums
发明人： John P. Dilger , Donald P. Pepperling , Nile K. Dielschneider , James C. Hawkins , David E. Woollums
IPC分类号： F16K3700
CPC分类号： G01F1/363 , G01F1/383 , G01F1/40 , G01F1/42 , G05D16/2053 , G05D16/2093 , Y10T137/8242
摘要： A magnet assembly is disclosed for use with a magnetic flux sensor to provide a position sensor adapted to detect a position of a moveable member. The magnet assembly comprises a magnet housing defining an inner surface. A magnet is provided that is sized for insertion into the magnet housing and adapted for movement with the moveable member, the magnet having a north pole and a south pole, wherein the magnet generates a magnetic flux. A centering ring is positioned between the magnet and the magnet housing, the centering ring including a biased wall acting to center the magnet in the magnet housing.

5. 发明授权

US06515474B1 Linearized magnetic displacement sensor 有权
标题翻译：线性磁位移传感器
公开(公告)号：US06515474B1
公开(公告)日：2003-02-04
申请号：US09454801
申请日：1999-12-03
申请人： Nile K. Dielschneider , John P. Dilger , Donald P. Pepperling
发明人： Nile K. Dielschneider , John P. Dilger , Donald P. Pepperling
IPC分类号： G01B714
CPC分类号： G01D5/145
摘要： A displacement sensor includes a magnet assembly having a housing for mounting to one of first and second relatively moveable elements. A magnet assembly is mounted to one element and defines a longitudinal space having an axis along its length. The magnet assembly includes at least one magnet having a north and a south pole that supply fringing magnetic flux in the longitudinal space and a flux-shaping pole piece on each of the north and south poles. A magnetic field sensor assembly has a housing for mounting to the other of the first and second elements for movement along an axis in the space parallel to the magnet assembly. In one embodiment, each of the flux-shaping pole pieces has a pentagon shape in a plane of primary flux pattern, forming a first face confronting the longitudinal space between the first and second magnets. In another embodiment, the magnet is a cylindrical magnet adjacent the longitudinal space, and the first face of each flux-shaping pole piece is cylindrical and coaxial with the cylindrical magnet. Preferably, the pole piece has a frusto-conical face confronting the longitudinal space adjacent the cylindrical face.
摘要翻译：位移传感器包括具有用于安装到第一和第二相对可移动元件中的一个的壳体的磁体组件。磁体组件安装在一个元件上并且限定了沿其长度具有轴的纵向空间。磁体组件包括至少一个具有北极和南极的磁体，其在纵向空间中提供边缘磁通量，并且在北极和南极中的每一个上具有磁通成形极片。磁场传感器组件具有用于安装到第一和第二元件中的另一个的壳体，用于沿平行于磁体组件的空间中的轴线移动。在一个实施例中，每个磁通成形极片在主要磁通图形的平面中具有五边形形状，形成面对第一和第二磁体之间的纵向空间的第一面。在另一个实施例中，磁体是与纵向空间相邻的圆柱形磁体，并且每个磁通形成极片的第一面是圆柱形的，与圆柱形磁体同轴。优选地，极片具有面向邻近圆柱面的纵向空间的截头圆锥形面。

6. 发明授权

US6161420A High frequency measuring circuit 失效
标题翻译：高频测量电路
公开(公告)号：US6161420A
公开(公告)日：2000-12-19
申请号：US968081
申请日：1997-11-12
申请人： John P. Dilger , Nile K. Dielschneider
发明人： John P. Dilger , Nile K. Dielschneider
IPC分类号： G01R23/10 , H03K13/14 , G01R23/02 , G01R23/14 , H03M1/10
CPC分类号： G01R23/10
摘要： An electrical circuit and method for measuring small variations in a high frequency signal is disclosed. The circuit generates a coarse measurement of the input signal frequency and a reference signal having the same frequency as the frequency represented by the coarse measurement. The circuit measures the difference in frequency between the input signal and the reference signal, and adds the coarse measurement and the difference measurement to determine the frequency of the input signal. The circuit may be used in conjunction with a piezoelectric acoustic wave device and oscillator to provide an apparatus for accurately measuring low concentrations of a gas.
摘要翻译：公开了一种用于测量高频信号中的小变化的电路和方法。该电路产生输入信号频率的粗略测量和与粗略测量表示的频率具有相同频率的参考信号。电路测量输入信号和参考信号之间的频率差，并加上粗略测量和差分测量，以确定输入信号的频率。电路可以与压电声波装置和振荡器结合使用，以提供用于精确测量气体的低浓度的装置。

7. 发明授权

US6029506A Sample retrieval system 失效
标题翻译：样品检索系统
公开(公告)号：US6029506A
公开(公告)日：2000-02-29
申请号：US968545
申请日：1997-11-12
申请人： John P. Dilger
发明人： John P. Dilger
IPC分类号： G01N1/22 , G01N1/24
CPC分类号： G01N1/2226 , G01N1/2202 , G01N1/24 , G01N2001/2223 , G01N2001/2241 , G01N2001/242
摘要： A method and apparatus for collecting fugitive emissions from valves and other emissions sources is disclosed. The apparatus comprises a capsule enclosing at least a portion of the equipment and an ejector in fluid flow communication with the capsule. The ejector is connected to a compressed air source, which creates a pressure drop in the ejector which draws emissions from the capsule into the ejector. The apparatus may include a sensor chamber housing gas sensors to detect the presence and concentration of any emissions from the equipment being monitored, and may store emissions data, communicate the data to a plant process control system, and use the data to control plant conditions to reduce or eliminate the emissions.
摘要翻译：公开了一种从阀门和其他排放源收集逃逸排放物的方法和装置。该装置包括封闭设备的至少一部分的胶囊和与胶囊流体连通的喷射器。喷射器连接到压缩空气源，其在喷射器中产生压降，其将来自胶囊的排放物吸入喷射器。该装置可以包括容纳气体传感器以检测来自被监视设备的任何排放物的存在和集中的传感器室，并且可以存储排放数据，将数据传送到工厂过程控制系统，并且使用数据来控制工厂条件减少或消除排放。

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