公开(公告)号：US20190195667A1

公开(公告)日：2019-06-27

申请号：US16288125

申请日：2019-02-28

Applicant: ABB Schweiz AG

Inventor： Horst Schwanzer ,  Tilo Merlin

IPC: G01D18/00 ,  G01R27/08 ,  G05B19/042

Abstract: A method for checking an operability of two-wire measuring transducers in automation technology which output a measurement signal as an impressed loop direct current via a two-wire line and active assemblies of which are supplied with electrical energy via the two-wire line includes: measuring the loop direct current and an input voltage of the measuring transducer; increasing the loop direct current in a range from a minimum value to a maximum value independently of the measured value, while measuring the input voltage of the measuring transducer; storing the measured values of the input voltage at selected measuring points of the loop direct current as an individual signature of the measuring transducer; and, during ongoing operation, measuring the input voltage at connection terminals of the two-wire line via an internal resistance of the measuring transducer at a prevailing loop direct current and recursively comparing that with the signature.

公开(公告)号：US10718642B2

公开(公告)日：2020-07-21

申请号：US16288125

申请日：2019-02-28

Applicant: ABB Schweiz AG

Inventor： Horst Schwanzer ,  Tilo Merlin

IPC: G01R27/08 ,  G01D18/00 ,  G05B19/042 ,  G01R27/02 ,  G01R1/20 ,  G01R27/14 ,  G01R31/28 ,  G01R27/16 ,  G01R19/00

Abstract: A method for checking an operability of two-wire measuring transducers in automation technology which output a measurement signal as an impressed loop direct current via a two-wire line and active assemblies of which are supplied with electrical energy via the two-wire line includes: measuring the loop direct current and an input voltage of the measuring transducer; increasing the loop direct current in a range from a minimum value to a maximum value independently of the measured value, while measuring the input voltage of the measuring transducer; storing the measured values of the input voltage at selected measuring points of the loop direct current as an individual signature of the measuring transducer; and, during ongoing operation, measuring the input voltage at connection terminals of the two-wire line via an internal resistance of the measuring transducer at a prevailing loop direct current and recursively comparing that with the signature.

公开(公告)号：US20230314241A1

公开(公告)日：2023-10-05

申请号：US18328025

申请日：2023-06-02

Applicant: ABB Schweiz AG

Inventor： Joerg Gebhardt ,  Guruprasad Sosale ,  Wilhelm Daake ,  Karsten Schroeder ,  Subhashish Dasgupta ,  Patric Ackermann ,  Horst Schwanzer

IPC: G01K15/00 ,  G01J5/02 ,  G01K1/024

CPC classification number: G01K15/007 ,  G01J5/02 ,  G01K1/024 ,  G01J2005/0077

Abstract: A method for validating an invasive temperature measurement system includes providing a first temperature data of the invasive temperature measurement system of a medium, the medium surrounded by a vessel wall enclosing the medium; providing a second temperature data of a non-invasive temperature measurement system, the non-invasive temperature measurement system thermally contacting an outside surface of the vessel wall enclosing the medium; determining a temperature of the medium based on the second temperature data medium properties and properties of the vessel wall; and comparing the first temperature data with the determined temperature of the medium to validate the invasive temperature measurement system.