公开(公告)号：AU2012238067B2

公开(公告)日：2015-01-22

申请号：AU2012238067

申请日：2012-03-07

Applicant: ROSEMOUNT INC

Inventor： RUD JASON H ,  BRONCZYK ANDREW J

IPC: H03M1/18

Abstract: A process variable transmitter (10) is used to measure a process variable, and, in doing so, dynamically changes the resolution of the A/D converter (18) based upon the measured value of the analog input signal. This can be done by automatically adjusting the configurable resolution gain adjustment based on the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution window of the A/D converter (18), or by adjusting a voltage reference provided to the A/D converter (18).

公开(公告)号：CA2886533A1

公开(公告)日：2014-04-03

申请号：CA2886533

申请日：2013-09-23

Applicant: ROSEMOUNT INC

Inventor： RUD JASON H ,  ENGELSTAD LOREN M

IPC: G05B23/02

Abstract: A process variable transmitter (10) includes an analog-to-digital (A/D) converter (22) that receives a sensor signal (20) provided by a sensor (18) that senses a process variable and converts the sensor signal (20) to a digital signal. A processor (24) receives the digital signal and provides a measurement output indicative of the digital signal. A noise detector (26) receives the sensor signal (20) and generates a first value indicative of a number of positive noise events relative to a positive threshold value and a second value indicative of a number of negative noise events relative to a negative threshold value. The processor (24) evaluates the noise count and generates a noise output, indicative of detected noise, based on the first and second values.

公开(公告)号：AU2012238067A1

公开(公告)日：2013-10-17

申请号：AU2012238067

申请日：2012-03-07

Applicant: ROSEMOUNT INC

Inventor： RUD JASON H ,  BRONCZYK ANDREW J

IPC: H03M1/18

Abstract: A process variable transmitter (10) is used to measure a process variable, and, in doing so, dynamically changes the resolution of the A/D converter (18) based upon the measured value of the analog input signal. This can be done by automatically adjusting the configurable resolution gain adjustment based on the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution window of the A/D converter (18), or by adjusting a voltage reference provided to the A/D converter (18).

公开(公告)号：CA2838132A1

公开(公告)日：2012-09-27

申请号：CA2838132

申请日：2012-03-02

Applicant: ROSEMOUNT INC

Inventor： RUD JASON H

IPC: G05B23/02

Abstract: A process variable transmitter (10) includes a memory (16) that stores a filtered sensor value that is calculated based on a prior received sensor value and a filtered rate of change value that is calculated based on a prior rate of change value. The process variable transmitter (10) also includes a controller (14) that receives a sensor value and compares it to the filtered sensor value to obtain a rate of change value. The controller (14) also compares the rate of change value to the filtered rate of change value to obtain a deviation value, and generates an output indication, such as a sensor failure warning output, based on the deviation value. This is done within the process variable transmitter (10).