公开(公告)号：CA2599369A1

公开(公告)日：2006-10-05

申请号：CA2599369

申请日：2006-03-16

Applicant: ROSEMOUNT INC

Inventor： HUISENGA GARRIE D ,  LONGSDORF RANDY J ,  JOHNSON JAMES A

IPC: G08C19/02 ,  G01R19/25

Abstract: A process device is configured for coupling to a two wire process control loop. Loop current output circuitry is configured to apply an output current to the two wire process control loop. Loop current verification circuitry is coupled to the two wire process control loop and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry is independent from the loop current output circuitry.

公开(公告)号：DE10297390T5

公开(公告)日：2005-02-17

申请号：DE10297390

申请日：2002-10-04

Applicant: ROSEMOUNT INC

Inventor： LOVEGREN ERIC R ,  SCHUMACHER MARK S ,  JOHNSON JAMES A ,  DIEDE KURT C

IPC: G01S13/10 ,  G01N22/00 ,  G01S13/88

Abstract: An apparatus for measuring concentration of a material in a process fluid includes an antenna configured to contact the process fluid and a pulse generator coupled to the antenna to generate a microwave transmit pulse through the antenna. A pulse receiver receives a reflected pulse from the antenna and the concentration of the material is calculated as a function of the reflected pulse.

公开(公告)号：DE10393009B4

公开(公告)日：2016-01-28

申请号：DE10393009

申请日：2003-07-14

Applicant: ROSEMOUNT INC

Inventor： JOHNSON JAMES A ,  LOVEGREN ERIC R

IPC: G01F23/284 ,  G01S7/282 ,  G01S7/40 ,  G01S13/18 ,  H03L7/18

Abstract: Durch die vorliegende Erfindung wird ein leistungsarmer gepulster Radar-Füllstandtransmitter (100) mit einer ersten und einer zweiten frequenzvariablen Oszillatorschaltung (212, 216) bereitgestellt, deren Frequenzen durch einen Frequenz-Offset voneinander verschoben sind. Ein dritter oder Referenzkristalloszillator (234) führt Phasenvergleichern (238, 248) in der ersten und in der zweiten Kristalloszillatorschaltung ein Referenzfrequenzausgangssignal zu. Die Phasenvergleicher stellen Vorspannungen für Varaktorelektroden (244, 254) ein, die die Sende- und Empfangsfrequenz ziehen.

公开(公告)号：CA2685525A1

公开(公告)日：2008-11-13

申请号：CA2685525

申请日：2008-05-02

Applicant: ROSEMOUNT INC

Inventor： NELSON RICHARD L ,  JOHNSON JAMES A

IPC: H02H9/00

Abstract: An industrial process field device (200) is provided. The device (200) in cludes wireless process field device electronics (412; 512; 612; 712; 812) d isposed within the industrial process field device (200) and at least one ba ttery cell (326; 442; 552; 652; 742; 842) disposed within the industrial pro cess field device (200) and operably coupled to the wireless process field d evice electronics (412; 512; 612; 712; 812). A circuit (400; 500; 600; 700; 800; 900) is provided that senses an electrical characteristic related to th e at least one cell (326; 442; 552; 652; 742; 842) and provides an output to a switch (418; 518; 610; 718; 818) to decouple the at least one cell (326; 442; 552; 652; 742; 842) from the industrial process field device electronic s (412; 512; 612; 712; 812) in response to certain conditions. Such conditio ns include too much current flowing from the at least one cell (326; 442; 55 2; 652; 742; 842); the voltage of the at least one cell (326; 442; 552; 652; 742; 842) being too low; or a short circuit being generated or otherwise ob served.

公开(公告)号：DE10393009T5

公开(公告)日：2005-09-01

申请号：DE10393009

申请日：2003-07-14

Applicant: ROSEMOUNT INC

Inventor： JOHNSON JAMES A ,  LOVEGREN ERIC R

IPC: G01F23/284 ,  G01S7/282 ,  G01S7/40 ,  G01S13/18 ,  H03L7/18

Abstract: A low power pulsed radar level transmitter has first and second pullable oscillator circuits that are offset from one another by a frequency offset. A third or reference crystal oscillator couples a reference frequency output to phase comparators in both the first and second crystal oscillator circuits. The phase comparators adjust biases on varactor diodes that pull the transmit and receive frequencies.

公开(公告)号：AU2003296021A1

公开(公告)日：2004-06-30

申请号：AU2003296021

申请日：2003-12-02

Applicant: ROSEMOUNT INC

Inventor： BROWN GREGORY C ,  JOHNSON JAMES A ,  LOVEGREN ERIC R

IPC: F15B15/28 ,  G01D5/48

公开(公告)号：AU2002330261A1

公开(公告)日：2003-05-12

申请号：AU2002330261

申请日：2002-10-04

Applicant: ROSEMOUNT INC

Inventor： JOHNSON JAMES A ,  DIEDE KURT C ,  SCHUMACHER MARK S ,  LOVEGREN ERIC R

IPC: G01S13/10 ,  G01N22/00 ,  G01S13/88 ,  G01N22/04

Abstract: An apparatus for measuring concentration of a material in a process fluid includes an antenna configured to contact the process fluid and a pulse generator coupled to the antenna to generate a microwave transmit pulse through the antenna. A pulse receiver receives a reflected pulse from the antenna and the concentration of the material is calculated as a function of the reflected pulse.

公开(公告)号：AU2022241595A1

公开(公告)日：2022-10-27

申请号：AU2022241595

申请日：2022-09-30

Applicant: ROSEMOUNT INC

Inventor： SCHNAARE THEODORE HENRY ,  KARSCHNIA ROBERT J ,  ROBINSON CORY ,  KIELB JOHN ALLAN ,  WEINBERGER ROBERT ,  LOVEGREN ERIC RUSSELL ,  ROTVOLD ERIC DARRELL ,  JOHNSON JAMES A ,  NEUHARTH JARED

IPC: H04W4/02 ,  G01S5/00

Abstract: LOCATION AWARENESS SYSTEM A location awareness system (100) including a communication network (102), and a network operating element (111) coupled to the communication network (102). At least one anchor network gateway (104) is coupled to the communication network (102), the at least one anchor network gateway (104) configured to generate a wireless anchor network (105). A plurality of anchors (106) are configured to couple to one of the at least one anchor network gateway (104) via its respective wireless anchor network (105). A plurality of tags (108, 110) is each configured to communicate with at least one anchor (106) to provide ranging information for determination of a position of the tag (108, 110) within an area covered by the system (100).