公开(公告)号：WO1997025602A1

公开(公告)日：1997-07-17

申请号：PCT/US1996020681

申请日：1996-12-19

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  ERYUREK, Evren ,  LENZ, Gary

IPC: G01K07/30

CPC classification number: G01K15/00 ,  G01K7/30

Abstract: A temperature transmitter (10) and a process control system includes a sensor input (1, 2, 3, 4) for coupling to a temperature sensor (16) having a temperature dependent resistance. Resistance measuring circuitry (20, 26, 50) couples to the sensor input (1, 2, 3, 4) and provides a resistance output related to resistance of the temperature dependent resistance. Analog to digital conversion circuitry (78, 88) couples to the sensor input (1, 2, 3, 4) and provides a digital output related to AC signals across the sensor input. Digital signal processing circuitry (64) isolates a Johnson noise component of the AC signals and provides a digitized Johnson output. Temperature measurement circuitry provides a calibrated temperature output based upon the resistance output and the digitized Johnson noise output. Output circuitry (24) transmits the calibrated temperature output over the process control loop (11).

Abstract translation: 温度变送器（10）和过程控制系统包括用于耦合到具有温度依赖性电阻的温度传感器（16）的传感器输入（1,2,3,4）。 电阻测量电路（20,26,50）耦合到传感器输入（1,2,3,4），并提供与温度依赖电阻的电阻相关的电阻输出。 模数转换电路（78,88）耦合到传感器输入端（1,2,3,4），并提供与传感器输入端的AC信号相关的数字输出。 数字信号处理电路（64）隔离交流信号的约翰逊噪声分量，并提供数字化的约翰逊输出。 温度测量电路提供基于电阻输出和数字化约翰逊噪声输出的校准温度输出。 输出电路（24）通过过程控制回路（11）传送经校准的温度输出。

公开(公告)号：WO1998020469A1

公开(公告)日：1998-05-14

申请号：PCT/US1997019045

申请日：1997-10-20

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  ERYUREK, Evren ,  LENZ, Gary

IPC: G08C19/02

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

Abstract: A transmitter (100) in a process control system includes a resistance sensor (110) sensing a process variable and providing a sensor output. Sensor monitoring circuitry (116) coupled to the sensor (110) provides a secondary signal related to the sensor (110). Analog-to-digital conversion circuitry (114) coupled to the sensor output and the sensor monitoring circuitry (116) provides a digitized sensor output and a digitized secondary signal. Output circuitry (124) coupled to a process control loop (102, 104) transmits a residual life estimate related to residual life of the sensor. A memory stores a set of expected results (120) related to the secondary signal and to the sensor (110). Diagnostic circuitry (118) provides the residual life estimate as a function of the expected results (120) stored in the memory, the digitized sensor output and the digitized secondary signal.

Abstract translation: 过程控制系统中的发射器（100）包括感测过程变量并提供传感器输出的电阻传感器（110）。 耦合到传感器（110）的传感器监测电路（116）提供与传感器（110）相关的辅助信号。 耦合到传感器输出和传感器监测电路（116）的模数转换电路（114）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（102,104）的输出电路（124）传输与传感器的剩余寿命相关的剩余寿命估计。 存储器存储与次级信号相关的一组预期结果（120）和传感器（110）。 诊断电路（118）提供作为存储在存储器中的预期结果（120），数字化传感器输出和数字化次级信号的函数的剩余寿命估计。

公开(公告)号：EP0937294B1

公开(公告)日：2001-08-29

申请号：EP97911852.8

申请日：1997-10-20

Applicant: ROSEMOUNT INC.

Inventor： ERYUREK, Evren ,  LENZ, Gary

IPC: G08C19/02 ,  G07C3/00

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

公开(公告)号：EP0871851B1

公开(公告)日：2004-07-07

申请号：EP96945064.2

申请日：1996-12-19

Applicant: ROSEMOUNT INC.

Inventor： ERYUREK, Evren ,  LENZ, Gary

IPC: G01K7/30 ,  G01K15/00

CPC classification number: G01K15/00 ,  G01K7/30

公开(公告)号：EP0937294A1

公开(公告)日：1999-08-25

申请号：EP97911852.0

申请日：1997-10-20

Applicant: ROSEMOUNT INC.

Inventor： ERYUREK, Evren ,  LENZ, Gary

IPC: G08C25 ,  G01K15 ,  G05B9 ,  G07C3 ,  G08C19

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

Abstract: A transmitter (100) in a process control system includes a resistance sensor (110) sensing a process variable and providing a sensor output. Sensor monitoring circuitry (116) coupled to the sensor (110) provides a secondary signal related to the sensor (110). Analog-to-digital conversion circuitry (114) coupled to the sensor output and the sensor monitoring circuitry (116) provides a digitized sensor output and a digitized secondary signal. Output circuitry (124) coupled to a process control loop (102, 104) transmits a residual life estimate related to residual life of the sensor. A memory stores a set of expected results (120) related to the secondary signal and to the sensor (110). Diagnostic circuitry (118) provides the residual life estimate as a function of the expected results (120) stored in the memory, the digitized sensor output and the digitized secondary signal.

公开(公告)号：EP0871851A1

公开(公告)日：1998-10-21

申请号：EP96945064.0

申请日：1996-12-19

Applicant: ROSEMOUNT INC.

Inventor： ERYUREK, Evren ,  LENZ, Gary

IPC: G01K7 ,  G01K15

CPC classification number: G01K15/00 ,  G01K7/30

Abstract: A temperature transmitter (10) and a process control system includes a sensor input (1, 2, 3, 4) for coupling to a temperature sensor (16) having a temperature dependent resistance. Resistance measuring circuitry (20, 26, 50) couples to the sensor input (1, 2, 3, 4) and provides a resistance output related to resistance of the temperature dependent resistance. Analog to digital conversion circuitry (78, 88) couples to the sensor input (1, 2, 3, 4) and provides a digital output related to AC signals across the sensor input. Digital signal processing circuitry (64) isolates a Johnson noise component of the AC signals and provides a digitized Johnson output. Temperature measurement circuitry provides a calibrated temperature output based upon the resistance output and the digitized Johnson noise output. Output circuitry (24) transmits the calibrated temperature output over the process control loop (11).