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1. 发明授权

US5237285A Method and apparatus for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter 失效
标题翻译：双层电容式压力变送器的电容温度补偿和制造方法及装置
公开(公告)号：US5237285A
公开(公告)日：1993-08-17
申请号：US775311
申请日：1991-10-18
申请人： Lyle E. Lofgren , John P. Schulte , Brian Seemann
发明人： Lyle E. Lofgren , John P. Schulte , Brian Seemann
IPC分类号： G01D5/24 , G01L9/12 , G01L13/06 , G01R27/26 , G01R27/28
CPC分类号： G01L9/125
摘要： A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compensation capacitance C.sub.DD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance C.sub.DM which is selected whereby M.sub.A C.sub.DA equals C.sub.DD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
摘要翻译：响应于压力差传感器的双线式变送器包括固定模块和可拆卸模块。固定模块适于连接到具有补偿电容MACDA或具有补偿电容CDD的数字可移除模块的模拟可移除模块。电容补偿电路包括在固定模块中，该模块包括一个补偿电容CDM，当补偿模拟可移动模块和数字可拆卸模块被校准时，该容量选择为MACDA等于CDD。这提供了更加线性化并且不易受温度变化影响的压力传递函数。

2. 发明授权

US5281922A Method for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter 失效
标题翻译：双板电容式压力变送器的电容温度补偿和制造方法
公开(公告)号：US5281922A
公开(公告)日：1994-01-25
申请号：US32637
申请日：1993-03-17
申请人： Lyle E. Lofgren , John P. Schulte , Brian Seemann
发明人： Lyle E. Lofgren , John P. Schulte , Brian Seemann
IPC分类号： G01D5/24 , G01L9/12 , G01L13/06 , G01R27/26 , G01R27/28
CPC分类号： G01L9/125
摘要： A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance M.sub.A C.sub.DA or a digital removable module having compensation capacitance C.sub.DD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance C.sub.DM which is selected whereby M.sub.A C.sub.DA equals C.sub.DD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
摘要翻译：响应于压力差传感器的双线式变送器包括固定模块和可拆卸模块。固定模块适于连接到具有补偿电容MACDA或具有补偿电容CDD的数字可移除模块的模拟可移除模块。电容补偿电路包括在固定模块中，该模块包括一个补偿电容CDM，当补偿模拟可移动模块和数字可拆卸模块被校准时，该容量选择为MACDA等于CDD。这提供了更加线性化并且不易受温度变化影响的压力传递函数。

3. 发明申请

US20110082568A1 PROCESS DEVICE WITH SAMPLING SKEW 有权
标题翻译：具有取样钻头的加工装置
公开(公告)号：US20110082568A1
公开(公告)日：2011-04-07
申请号：US12571622
申请日：2009-10-01
申请人： John P. Schulte
发明人： John P. Schulte
IPC分类号： G05B13/02
CPC分类号： G05B23/0221 , G01F15/00 , G01F15/063 , G01F23/0069 , G01F23/0076
摘要： An industrial process device for monitoring or controlling an industrial process includes a first input configured to receive a first plurality of samples related to a first process variable and a second input configured to receive a second plurality of samples related to a second process variable. Compensation circuitry is configured to compensate for a time difference between the first plurality of samples and the second plurality of samples and provide a compensated output related to at least one of the first and second process variables. The compensated output can comprise, or can be used to calculate a third process variable. The third process variable can be used to monitor or control the industrial process.
摘要翻译：一种用于监测或控制工业过程的工业过程装置包括被配置为接收与第一过程变量相关的第一多个采样的第一输入和被配置为接收与第二过程变量相关的第二多个采样的第二输入。补偿电路被配置为补偿第一多个样本和第二多个样本之间的时间差，并提供与第一和第二过程变量中的至少一个有关的补偿输出。补偿输出可以包括或可以用于计算第三过程变量。第三个过程变量可用于监控或控制工业过程。

4. 发明授权

US07484416B1 Process control transmitter with vibration sensor 有权
标题翻译：带振动传感器的过程控制变送器
公开(公告)号：US07484416B1
公开(公告)日：2009-02-03
申请号：US11872184
申请日：2007-10-15
申请人： Andrew J. Klosinski , John P. Schulte
发明人： Andrew J. Klosinski , John P. Schulte
IPC分类号： G06F11/00 , G01L9/12
CPC分类号： G05B23/0235 , G01L9/0072 , G01L23/125
摘要： A transmitter for use in an industrial process control system, includes a process coupling configured to couple to a process fluid. A sensor housing has a cavity formed therein which is in fluidic communication with the process fluid. A diaphragm in the cavity isolates a portion of the cavity from the process fluid and moves in response to pressure applied by the process fluid. A first electrode in the isolated portion of the cavity is configured to form a first capacitance with the diaphragm and a second electrode in the isolated portion of the cavity configured to form a second capacitance with the diaphragm. Measurement circuitry coupled to the first and second capacitance measures a pressure of the process fluid based upon at least one of the first capacitance and second capacitance. The measurement circuitry further configured to measure vibrations in the process fluid based upon at least one of the first capacitance and second capacitance.
摘要翻译：一种用于工业过程控制系统的变送器，包括被配置为耦合到过程流体的过程联接。传感器壳体具有形成在其中的空腔，其与过程流体流体连通。空腔中的隔膜将空腔的一部分与过程流体隔离，并响应于过程流体施加的压力而移动。空腔的隔离部分中的第一电极被配置为与隔膜形成第一电容，并且空腔的隔离部分中的第二电极被配置成与隔膜形成第二电容。耦合到第一和第二电容的测量电路基于第一电容和第二电容中的至少一个来测量过程流体的压力。测量电路还被配置为基于第一电容和第二电容中的至少一个来测量过程流体中的振动。

5. 发明授权

US5705978A Process control transmitter 失效
标题翻译：过程控制变送器
公开(公告)号：US5705978A
公开(公告)日：1998-01-06
申请号：US536766
申请日：1995-09-29
申请人： Roger L. Frick , Ahmed H. Tewfik , John P. Schulte
发明人： Roger L. Frick , Ahmed H. Tewfik , John P. Schulte
IPC分类号： G08C19/02 , G08C19/10 , G08B29/00
CPC分类号： G08C19/10 , G08C19/02
摘要： A transmitter in a process control system includes input/output circuitry for coupling to a process control loop. A first sensor having a first impedance is responsive to a first sensed parameter. A second sensor having a second impedance is responsive to a sensed parameter. First and second excitation signals are applied to the first and second sensors. A summing node sums the outputs of the first and second sensors. An analog to digital converter provides a digital output representative of the summed signals. Digital signal processing circuitry coupled to the analog to digital converter provides an output related to the outputs of the first and second sensors to the input/output circuitry for transmission over the process control loop.
摘要翻译：过程控制系统中的变送器包括用于耦合到过程控制回路的输入/输出电路。具有第一阻抗的第一传感器响应于第一感测参数。具有第二阻抗的第二传感器响应感测参数。第一和第二激励信号被施加到第一和第二传感器。求和节点对第一和第二传感器的输出求和。模数转换器提供代表求和信号的数字输出。耦合到模数转换器的数字信号处理电路将与第一和第二传感器的输出相关的输出提供给输入/输出电路，以便在过程控制环路上传输。

6. 发明授权

US5155445A Vernier voltage-to-digital converter with a storage capacitance selectable in magnitude 失效
标题翻译：具有可选择大小的存储电容的游标电压 - 数字转换器
公开(公告)号：US5155445A
公开(公告)日：1992-10-13
申请号：US670988
申请日：1991-03-18
申请人： Roger L. Frick , John P. Schulte
发明人： Roger L. Frick , John P. Schulte
IPC分类号： G01L9/12 , G01L1/22 , G01R27/26
CPC分类号： G01L1/2256 , G01L1/2281
摘要： A voltage-to-digital converter comprising a storage circuit for providing a storage capacitance with a plurality of selectable magnitudes. The storage circuit provides a charge output representative of applied voltage input signals and the selected capacitive magnitude. A charge accumulation circuit is coupled to the charge output. The total charge accumulated is proportional to the integral of the amount of charge discharged from the storage circuit. The charge accumulation circuit provides a balance output representative of a comparison of the accumulated charge and a reference charge. A control circuit is coupled to the balance output for providing feedback signals as functions of the balance output for periodically charging and discharging the storage capacitance whereby a first sequence of charge packets is provided on the charge output for driving the accumulation of charge toward the reference within a first set of limits when a first capacitive magnitude is selected in the storage circuit and whereby a second sequence of charge packets is provided on the charge output for driving the accumulation of charge toward the reference charge within a second set of limits when a second capacitive magnitude is selected in the storage circuit. A calculation circuit is coupled to the feedback circuit for counting the number of charged packets generated in a measurement cycle. An output circuit provides an output indicative of the voltage input signals as a function of the number of packets counted.
摘要翻译：一种电压 - 数字转换器，包括用于向多个可选择量值提供存储电容的存储电路。存储电路提供表示施加的电压输入信号和所选择的电容幅度的电荷输出。电荷累积电路耦合到电荷输出。累积的总电荷与从存储电路放出的电荷量的积分成比例。电荷累积电路提供表示累积电荷与参考电荷的比较的平衡输出。控制电路耦合到平衡输出端，用于提供作为平衡输出的功能的反馈信号，用于周期性地对存储电容进行充电和放电，由此在电荷输出上提供第一序列的电荷分组，以将电荷累积驱动向着参考的内部当在存储电路中选择第一电容幅度并且由此在电荷输出上提供第二序列的电荷分组时的第一组限制，以在第二组电容中驱动向第一组限制内的参考电荷积累在存储电路中选择大小。计算电路耦合到反馈电路，用于对在测量周期中产生的充电分组的数量进行计数。输出电路提供指示电压输入信号的输出作为计数的分组数的函数。

7. 发明授权

US4800758A Pressure transducer with stress isolation for hard mounting 失效
标题翻译：具有应力隔离的压力传感器用于硬安装
公开(公告)号：US4800758A
公开(公告)日：1989-01-31
申请号：US877278
申请日：1986-06-23
申请人： Thomas A. Knecht , James Ruf , John P. Schulte
发明人： Thomas A. Knecht , James Ruf , John P. Schulte
IPC分类号： G01L9/04 , G01L7/08 , G01L9/00 , G01L19/00 , G01L19/10 , G01L7/10 , G01L9/06
CPC分类号： G01L19/146 , G01L19/147 , G01L9/0051
摘要： A pressure transducer has a stress isolator layer which permits the sensor to be non-resiliently mounted (hard mounted) to a mounting surface that in turn is subjected to strain. The strain of the mounting surface tends to induce undesired stress in the sensing diaphragm, and the present stress isolator layer minimizes the amount of stress that is transferred to the measuring diaphragm, to thereby reduce error. The spring preferably comprises a silicon leaf0type spring, with or without isolating slots, and is used in various combinations of diaphragms that are sensitive to pressure. The deflection of the diaphragm in response to pressure can be measured in any desired known manner such as with strain gage resistors, or through capacitive sensing.
摘要翻译：压力传感器具有应力隔离层，其允许传感器非弹性地安装（硬安装）到安装表面，该安装表面又受到应变。安装表面的应变趋向于在感测隔膜中引起不期望的应力，并且本应力隔离层使传递到测量膜的应力量最小化，从而减少误差。弹簧优选地包括具有或不具有隔离槽的硅片簧型弹簧，并且被用于对压力敏感的各种膜片组合。响应于压力的膜片的偏转可以以任何所需的已知方式测量，例如应变计电阻器，或通过电容感测。

8. 发明申请

US20110282467A1 TWO-WIRE INDUSTRIAL PROCESS FIELD DEVICE WITH POWER SCAVENGING 有权
标题翻译：双线工业过程现场设备与电源SCAVENGING
公开(公告)号：US20110282467A1
公开(公告)日：2011-11-17
申请号：US13098678
申请日：2011-05-02
申请人： John P. Schulte
发明人： John P. Schulte
IPC分类号： G06F1/26
CPC分类号： G05B19/0423
摘要： A process field device for use in monitoring or controlling an industrial process includes first and second loop terminals configured to couple to a two-wire industrial process control loop. Field device circuitry is configured to monitor or control a process variable of the industrial process. The field device circuitry is powered by power connections from the two-wire industrial process control loop. A current regulator is connected in series with the two-wire industrial process control loop, the first and second loop terminals and the field device circuitry. The current regulator is configured to control a loop current flowing through the two-wire process control loop. A voltage regulator is connected in parallel with the current regulator and in series with the two-wire industrial process control loop, first and second loop terminals and field device circuitry. The voltage regulator is configured to control a voltage across the field device circuitry.
摘要翻译：用于监测或控制工业过程的过程现场设备包括被配置为耦合到两线工业过程控制回路的第一和第二回路端子。现场设备电路被配置为监视或控制工业过程的过程变量。现场设备电路由来自两线工业过程控制回路的电源连接供电。电流调节器与双线工业过程控制回路，第一和第二回路端子和现场设备电路串联连接。电流调节器被配置为控制流过两线过程控制回路的回路电流。电压调节器与电流调节器并联连接，并与两线工业过程控制回路，第一和第二回路端子和现场设备电路串联。电压调节器被配置为控制现场设备电路两端的电压。

9. 发明授权

US07970063B2 Variable liftoff voltage process field device 有权
标题翻译：可变离心电压过程现场设备
公开(公告)号：US07970063B2
公开(公告)日：2011-06-28
申请号：US12045248
申请日：2008-03-10
申请人： John P. Schulte
发明人： John P. Schulte
IPC分类号： H04L27/00
CPC分类号： G05B19/0423 , G05B2219/25428 , G08C19/02 , G08C2201/10
摘要： A field transmitter includes field device circuitry configured to measure or control a process variable. A first process control loop terminal is configured to couple to a two-wire process control loop which carries a loop current. A second process control loop terminal configured to couple to the two-wire process control loop. A switching regulator has an input and an output. The output is coupled to the transmitter circuitry and arranged to provide power to the transmitter circuitry. A variable voltage source having an input electrically coupled to the first process control loop terminal, and a voltage output coupled to the input of the switching regulator and a control input. The voltage output is a function of the control input.
摘要翻译：现场发射机包括配置成测量或控制过程变量的现场设备电路。第一过程控制回路端子被配置为耦合到携带回路电流的二线过程控制回路。配置为耦合到两线制过程控制回路的第二过程控制回路端子。开关稳压器具有输入和输出。输出耦合到发射机电路并被布置成向发射机电路提供电力。一种可变电压源，具有电耦合到第一过程控制回路端子的输入端，以及耦合到开关调节器的输入端的电压输出端和控制输入端。电压输出是控制输入的函数。

10. 发明申请

US20100083768A1 Thermal-based diagnostic system for process transmitter 有权
标题翻译：用于过程变送器的基于热的诊断系统
公开(公告)号：US20100083768A1
公开(公告)日：2010-04-08
申请号：US12287106
申请日：2008-10-06
申请人： Robert C. Hedtke , Charles R. Willcox , David A. Broden , Andrew Juri Klosinski , John P. Schulte
发明人： Robert C. Hedtke , Charles R. Willcox , David A. Broden , Andrew Juri Klosinski , John P. Schulte
IPC分类号： G01L9/12
CPC分类号： G01L27/005 , G01L27/007 , Y02P80/114
摘要： A process transmitter for measuring a process variable in an industrial process comprises a sensor module, a heating device and transmitter circuitry. The sensor module has a sensor for sensing a process variable of an industrial process and generating a sensor signal. The heating device is connected to the sensor module for generating a heat pulse to influence generation of the sensor signal. The transmitter circuitry is connected to the sensor and the heating device. The transmitter circuitry verifies operation of the sensor by measuring a change in the sensor signal due to the heat pulse. In one embodiment of the invention, the heat pulse thermally expands a volume of a fill fluid within the process transmitter. In another embodiment, the heat pulse changes a physical property, such as dielectric, of a fill fluid within the process transmitter.
摘要翻译：用于测量工业过程中的过程变量的过程变送器包括传感器模块，加热装置和发射器电路。传感器模块具有用于感测工业过程的过程变量并产生传感器信号的传感器。加热装置连接到传感器模块，用于产生热脉冲以影响传感器信号的产生。发射机电路连接到传感器和加热装置。发射机电路通过测量由于热脉冲引起的传感器信号的变化来验证传感器的操作。在本发明的一个实施例中，热脉冲热膨胀过程变送器内的填充流体的体积。在另一个实施例中，热脉冲改变过程变送器内的填充流体的物理性质，例如电介质。

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