公开(公告)号：US5942696A

公开(公告)日：1999-08-24

申请号：US826272

申请日：1997-03-27

Applicant: Lowell A. Kleven

Inventor： Lowell A. Kleven

IPC: G01F1/32

CPC classification number: G01F1/329

Abstract: A vortex flowmeter senses a pressure of vortices in a flowing fluid and transmits an output related to mass flow. The vortex flowmeter includes a dynamic filter filtering the vortex pressure signal. The dynamic filter provides a first filtered output signal and a second filtered output signal. The dynamic filter includes a controllable transfer function. Control circuitry controls the controllable transfer function and provides an output related to mass flow as a function of the first filtered output signal and the second filtered output signal. Transmitter circuitry receives the output signal and transmits a signal related to mass flow.

Abstract translation: 涡流流量计感测流动流体中的涡流的压力并传输与质量流相关的输出。 涡街流量计包括过滤涡流压力信号的动态滤波器。 动态滤波器提供第一滤波输出信号和第二滤波输出信号。 动态滤波器包括可控制的传递函数。 控制电路控制可控传递函数，并提供与质量流相关的输出作为第一滤波输出信号和第二滤波输出信号的函数。 发射机电路接收输出信号并发送与质量流相关的信号。

公开(公告)号：US5926080A

公开(公告)日：1999-07-20

申请号：US939199

申请日：1997-09-29

Applicant: Donald F. Palan ,  Mark J. Gailloux

Inventor： Donald F. Palan ,  Mark J. Gailloux

IPC: G01F23/284 ,  H01P1/08 ,  G01F23/00 ,  G01R27/00

CPC classification number: G01F23/284 ,  H01P1/08

Abstract: A waveguide for microwave radar level gages that includes a process sealed barrier in the waveguide that is impedance matched with bore transition sections of the waveguide at opposite ends thereof. The impedance matching results in positioning of the tapered end of the barrier offset from the ends of the bore transition sections.

Abstract translation: 一种用于微波雷达液位计的波导，其包括在波导中与波导的相对端的孔过渡部分阻抗匹配的过程密封屏障。 阻抗匹配导致屏障的锥形端与孔过渡段的端部偏移的定位。

公开(公告)号：US5922965A

公开(公告)日：1999-07-13

申请号：US67601

申请日：1998-04-28

Applicant: Steven M. Behm ,  Jeffrey C. Brekken

Inventor： Steven M. Behm ,  Jeffrey C. Brekken

IPC: G01L13/00 ,  G01L9/00 ,  G01L19/06 ,  G01L7/00 ,  G01L7/18

CPC classification number: G01L13/026 ,  G01L19/0038 ,  G01L19/0645 ,  G01L19/0663

Abstract: A process control instrument adapted to provide an output indicative of a parameter of a process fluid is disclosed. The process control instrument is designed to be attachable to a flange having a first passageway filled with process fluid. A body of the process control instrument has an opening adjacent to the first passageway adapted to receive process fluid from the first passageway. An isolation diaphragm is positioned in the opening of the body and separates the opening and the first passageway from a second passageway. A weld ring positioned in the opening is adapted to evenly distribute an attachment force across a support surface such that damage to the isolation diaphragm is minimized.

公开(公告)号：US5876122A

公开(公告)日：1999-03-02

申请号：US869668

申请日：1997-06-05

Applicant: Evren Eryurek

Inventor： Evren Eryurek

IPC: G01K7/16 ,  G01K15/00

CPC classification number: G01K7/16 ,  G01K15/00

Abstract: A temperature transmitter in a process control loop comprises a temperature sensor and a transmitter circuit. The temperature sensor includes a sensor sheath and a sensor element positioned within the sensor sheath. At least one element lead is coupled to the sensor element and extends from the sensor sheath. A sheath lead is coupled to the sensor sheath and extends from the sensor sheath, wherein the element lead and the sheath lead provide signals to be measured. The transmitter circuit includes and A/D converter, a microprocessor and an input-output circuit. The A/D converter is coupled to receive the signals from the element lead and the sheath lead. The microprocessor is coupled to the A/D converter. The input-output circuit is coupled to the microprocessor for communication with the process control loop. The sheath lead allows the transmitter to monitor the sensor sheath's insulation resistance and generation of parasitic sheath-to-lead voltage.

Abstract translation: 过程控制回路中的温度变送器包括温度传感器和发射器电路。 温度传感器包括传感器护套和位于传感器护套内的传感器元件。 至少一个元件引线联接到传感器元件并从传感器护套延伸。 护套引线耦合到传感器护套并从传感器护套延伸，其中元件引线和护套引线提供待测量的信号。 发射机电路包括A / D转换器，微处理器和输入 - 输出电路。 A / D转换器被耦合以接收来自元件引线和护套引线的信号。 微处理器耦合到A / D转换器。 输入 - 输出电路耦合到微处理器以与过程控制回路通信。 护套引线允许变送器监测传感器护套的绝缘电阻，并产生寄生护套与引线电压。

公开(公告)号：US5851083A

公开(公告)日：1998-12-22

申请号：US726145

申请日：1996-10-04

Applicant: Donald F. Palan

Inventor： Donald F. Palan

IPC: G01F23/284 ,  H01P1/04

CPC classification number: G01F23/284 ,  Y10T403/645

Abstract: A microwave level gauge has a flange adaptor which includes a first end for coupling to a process connecting flange and a second end for coupling to an electronics housing. The adaptor has a section of reduced cross-sectional area along its length between the first and second ends, which defines a thermal transfer restriction that restricts heat transfer from the first end to the second end. A waveguide extends through the adaptor, from the first end to the second end.

Abstract translation: 微波水平仪具有法兰适配器，其包括用于联接到过程连接法兰的第一端和用于联接到电子设备外壳的第二端。 适配器具有沿其长度在第一和第二端之间减小的横截面积的部分，其限定了限制从第一端到第二端的热传递的热传递限制。 波导从第一端延伸穿过适配器到第二端。

公开(公告)号：USD400870S

公开(公告)日：1998-11-10

申请号：US065583

申请日：1997-01-24

Applicant: Mark Christensen

Designer： Mark Christensen

公开(公告)号：US5829876A

公开(公告)日：1998-11-03

申请号：US857236

申请日：1997-05-16

Applicant: Bradley N. Schwartz ,  William R. Kirkpatrick

Inventor： Bradley N. Schwartz ,  William R. Kirkpatrick

IPC: G01K7/13 ,  G01K15/00

CPC classification number: G01K7/20 ,  G01K15/00 ,  G01K7/13

Abstract: A transmitter in a process control loop measures temperature. A calibrator includes a known calibration element which is connected to the transmitter. Software in the transmitter compares a measured value of the calibration element with the actual value of the calibration element and responsively calibrates the transmitter. The calibrator includes a temperature calibration sensor for coupling to a terminal block of the transmitter. The temperature calibration sensor provides an actual temperature input to the transmitter. The transmitter measures actual temperature of the terminal block and compares actual temperature with a temperature measured by an internal terminal block temperature sensor, and responsively calibrates the internal temperature sensor.

Abstract translation: 过程控制回路中的变送器测量温度。 校准器包括已连接到发射器的已知校准元件。 发射机中的软件将校准元件的测量值与校准元件的实际值进行比较，并响应校准变送器。 校准器包括用于耦合到发射器的端子块的温度校准传感器。 温度校准传感器为变送器提供实际温度输入。 变送器测量接线端子的实际温度，并将实际温度与内部端子块温度传感器测量的温度进行比较，并对内部温度传感器进行响应校准。

公开(公告)号：US5828567A

公开(公告)日：1998-10-27

申请号：US744980

申请日：1996-11-07

Applicant: Evren Eryurek ,  Gary Lenz

Inventor： Evren Eryurek ,  Gary Lenz

IPC: G08C25/00 ,  G01K15/00 ,  G05B9/03 ,  G07C3/00 ,  G08C19/02 ,  G06F19/00

CPC classification number: G08C19/02 ,  G01K15/00 ,  G05B9/03 ,  G07C3/00 ,  Y10S706/903

Abstract: Transmitter in a process control system includes a resistance sensor sensing a process variable and providing a sensor output. Sensor monitoring circuitry coupled to the sensor provides a secondary signal related to the sensor. Analog-to-digital conversion circuitry coupled to the sensor output and the sensor monitoring circuitry provides a digitized sensor output and a digitized secondary signal. Output circuitry coupled to a process control loop transmits a residual life estimate related to residual life of the sensor. A memory stores a set of expected results related to the secondary signal and to the sensor. Diagnostic circuitry provides the residual life estimate as a function of the expected results stored in the memory, the digitized sensor output and the digitized secondary signal.

Abstract translation: 过程控制系统中的变送器包括感测过程变量并提供传感器输出的电阻传感器。 耦合到传感器的传感器监测电路提供与传感器相关的辅助信号。 耦合到传感器输出和传感器监测电路的模数转换电路提供数字化的传感器输出和数字化的辅助信号。 耦合到过程控制回路的输出电路传输与传感器的剩余寿命相关的剩余寿命估计。 存储器存储与二次信号和传感器相关的一组预期结果。 诊断电路根据存储在存储器中的预期结果，数字化传感器输出和数字化辅助信号提供剩余寿命估计。

公开(公告)号：US5817950A

公开(公告)日：1998-10-06

申请号：US582905

申请日：1996-01-04

Applicant: David E. Wiklund ,  Brian J. Bischoff

Inventor： David E. Wiklund ,  Brian J. Bischoff

IPC: G01F1/46

CPC classification number: G01F1/46

Abstract: A transmitter in a process control system for measuring flow rate measures total pressure (P.sub.TOT) and differential pressure (h) of process fluid flowing through a process pipe. The static pressure (P.sub.STAT) is determined based upon the total pressure (P.sub.TOT). The calculated static pressure is used to determine the fluid density (.rho.) and the gas expansion factor (Y.sub.1) of the process fluid flowing in the pipe. This information is used to calculate flow rate (Q) of the process fluid.

Abstract translation: 用于测量流量的过程控制系统中的变送器测量流过过程管道的工艺流体的总压力（PTOT）和压差（h）。 静压（PSTAT）是根据总压（PTOT）来确定的。 计算静态压力用于确定在管道中流动的工艺流体的流体密度（rho）和气体膨胀系数（Y1）。 该信息用于计算过程流体的流量（Q）。

公开(公告)号：US5808205A

公开(公告)日：1998-09-15

申请号：US831355

申请日：1997-04-01

Applicant: Mark G. Romo

Inventor： Mark G. Romo

IPC: G01L9/00 ,  G01L9/12

CPC classification number: G01L9/0005

Abstract: An elongated pressure sensor includes an inner bar carried within an elongated hollow member. A gap formed between the bar and elongated hollow member changes shape in response to a pressure applied to the elongated hollow member. Capacitive electrodes on the elongated hollow member and bar have a capacitance which changes in response to applied pressure. The sensor is adapted for coupling to a multifunction body.

Abstract translation: 细长的压力传感器包括承载在细长的中空构件内的内杆。 在杆和细长型中空构件之间形成的间隙响应于施加到细长型中空构件的压力而改变形状。 细长中空构件和杆上的电容电极具有响应于施加的压力而变化的电容。 传感器适用于耦合到多功能机身。