公开(公告)号：DE69628178D1

公开(公告)日：2003-06-18

申请号：DE69628178

申请日：1996-09-13

Applicant: ROSEMOUNT INC

Inventor： FRICK L ,  SCHULTE P ,  TEWFIK H

IPC: G08C19/02 ,  G08C19/10

Abstract: 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.

公开(公告)号：DE69628178T2

公开(公告)日：2004-04-08

申请号：DE69628178

申请日：1996-09-13

Applicant: ROSEMOUNT INC

Inventor： FRICK L ,  SCHULTE P ,  TEWFIK H

IPC: G08C19/02 ,  G08C19/10

Abstract: 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.

公开(公告)号：DE60010728T2

公开(公告)日：2005-05-12

申请号：DE60010728

申请日：2000-09-22

Applicant: ROSEMOUNT INC

Inventor： KLEVEN A ,  TEWFIK H

IPC: G08C15/00 ,  G01D21/00 ,  G05B13/04 ,  G05B19/042 ,  G05B23/02 ,  G06F17/10 ,  G06F17/17 ,  G08C13/00 ,  G08C19/02 ,  G05B19/418

Abstract: A transmitter for measuring a process variable includes a sensor configured to couple to a process and having a sensor output related to the process variable. A microprocessor coupled to the sensor output provides a process variable output which is a function of an orthogonal-polynomial of the sensor output. A transmitter output is configured to provide an output related to the process variable.

公开(公告)号：DE60010728D1

公开(公告)日：2004-06-17

申请号：DE60010728

申请日：2000-09-22

Applicant: ROSEMOUNT INC

Inventor： KLEVEN A ,  TEWFIK H

IPC: G08C15/00 ,  G01D21/00 ,  G05B13/04 ,  G05B19/042 ,  G05B23/02 ,  G06F17/10 ,  G06F17/17 ,  G08C13/00 ,  G08C19/02 ,  G05B19/418

Abstract: A transmitter for measuring a process variable includes a sensor configured to couple to a process and having a sensor output related to the process variable. A microprocessor coupled to the sensor output provides a process variable output which is a function of an orthogonal-polynomial of the sensor output. A transmitter output is configured to provide an output related to the process variable.