DE102011109495A1 - Pressure transmitter for determination of process pressures in process plants, has piezoresistive sensors and hydraulic power transmission unit for determining the pressures, and electronic circuit for preprocessing the sensed readings - Google Patents
Pressure transmitter for determination of process pressures in process plants, has piezoresistive sensors and hydraulic power transmission unit for determining the pressures, and electronic circuit for preprocessing the sensed readings Download PDFInfo
- Publication number
- DE102011109495A1 DE102011109495A1 DE102011109495A DE102011109495A DE102011109495A1 DE 102011109495 A1 DE102011109495 A1 DE 102011109495A1 DE 102011109495 A DE102011109495 A DE 102011109495A DE 102011109495 A DE102011109495 A DE 102011109495A DE 102011109495 A1 DE102011109495 A1 DE 102011109495A1
- Authority
- DE
- Germany
- Prior art keywords
- pressure transmitter
- pressures
- temperature
- unit
- preprocessing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
- G01L9/0052—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance of piezoresistive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
- G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
- G01L13/026—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms involving double diaphragm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/02—Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device; Zero-setting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
- G01L9/065—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices with temperature compensating means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Die Erfindung betrifft einen Druckmessumformer mit piezoresistiven Sensoren und hydraulischer Kraftübertragung zur Bestimmung von Prozessdrücken in verfahrenstechnischen Anlagen.The invention relates to a pressure transducer with piezoresistive sensors and hydraulic power transmission for determining process pressures in process plants.
Druckmessumformer mit piezoresistiven Sensoren und hydraulischer Kraftübertragung sind allgemein bekannt. In der
Darüber hinaus ist aus dem deutschen Gebrauchsmuster
Das Messprinzip beruht beidenfalls auf der Verformung einer Membran durch die auf beiden Seiten der Membran anliegende Druckdifferenz.The measuring principle is based both on the deformation of a membrane by the applied pressure difference on both sides of the membrane.
Piezoresistive Drucksensoren zeichnen sich durch eine hohe Langzeitstabilität, einen weiten Einsatztemperaturbereich und eine großen Messbereich bei geringer Temperaturabhängigkeit und hoher Messdynamik aus. Im Betriebseinsatz hat sich jedoch herausgestellt, dass piezoresistive Drucksensoren ein lagebedingten Offset aufweisen, der das Messergebnis verfälscht. Dieses Offset resultiert aus der Wirkung der Erdbeschleunigung auf die Masse des fluiden Druckmittlers in Abhängigkeit von deren Höhe der Flüssigkeitssäule. Die Höhe der Flüssigkeitssäule (Ölsäule) ist eine Funktion der Lage. Darüber hinaus ist dieses Offset temperaturabhängig.Piezoresistive pressure sensors are characterized by a high long-term stability, a wide operating temperature range and a large measuring range with low temperature dependence and high measuring dynamics. In operational use, however, it has been found that piezoresistive pressure sensors have a positional offset that falsifies the measurement result. This offset results from the effect of the gravitational acceleration on the mass of the fluid pressure transmitter as a function of the height of the liquid column. The height of the liquid column (oil column) is a function of the position. In addition, this offset is temperature dependent.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Druckmessumformer mit piezoresistiven Sensoren und hydraulischer Kraftübertragung anzugeben, bei dem die Messwertverfälschung aus der Wirkung der Erdbeschleunigung auf die Masse des fluiden Druckmittlers vermieden wird.The invention is therefore based on the object to provide a pressure transducer with piezoresistive sensors and hydraulic power transmission, in which the Messwertverfälschung is avoided by the effect of gravitational acceleration on the mass of the fluid pressure transmitter.
Erfindungsgemäß wird diese Aufgabe mit den Mitteln des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den rückbezogenen Ansprüchen genannt.According to the invention this object is achieved by the means of claim 1. Advantageous embodiments of the invention are mentioned in the dependent claims.
Die Erfindung geht von einem Druckmessumformer mit piezoresistiven Drucksensoren und hydraulischer Kraftübertragung aus, bei der der Prozessdruck des Messmediums unter Zwischenschaltung einer Trennmembran mit einem fluiden Druckmittler auf den Drucksensor übertragen wird. Der Druckmessumformer weist darüber hinaus eine elektronische Schaltung zur Vorverarbeitung des ermittelten Messwerts auf.The invention is based on a pressure transducer with piezoresistive pressure sensors and hydraulic power transmission, in which the process pressure of the measuring medium is transmitted to the pressure sensor with the interposition of a separating diaphragm with a fluid pressure transmitter. The pressure transmitter also has an electronic circuit for preprocessing the determined measured value.
Erfindungsgemäß weist der Druckmessumformer einen Temperatursensor zur Bestimmung der Temperatur des fluiden Druckmittlers auf. Darüber hinaus ist der Druckmessumformer mit einer Einheit zur Entgegennahme der Einbaulageinformation entsprechend der Einbaulage des Druckmessumformers ausgestattet. Der Temperatursensor und die Einheit zur Entgegennahme der Einbaulageinformation sind mit einer Korrektureinheit verbunden. Die Korrektureinheit ist ausgebildet, aus der Temperatur des Temperatursensor und der Einbaulage einen Korrekturwert des lage- und temperaturbedingten Offsets zu berechnen. Die Korrektureinheit ist Bestandteil der elektronischen Schaltung zur Vorverarbeitung des ermittelten Messwerts.According to the invention, the pressure transmitter has a temperature sensor for determining the temperature of the fluid pressure transmitter. In addition, the pressure transmitter is equipped with a unit for receiving the mounting position information according to the installation position of the pressure transmitter. The temperature sensor and the unit for receiving the installation position information are connected to a correction unit. The correction unit is designed to calculate a correction value of the position-dependent and temperature-dependent offset from the temperature of the temperature sensor and the installation position. The correction unit is part of the electronic circuit for preprocessing the determined measured value.
Nach der Installation des Druckmessumformers steht dessen Einbaulage durch die mechanisch-konstruktive Befestigung in der Prozessanlage fest und behält diese ohne weitere Eingriffe stabil bei. Im Rahmen der Inbetriebnahme des Druckmessumformers wird dessen tatsächliche Einbaulage in der Prozessanlage bestimmt und der Einheit zur Entgegennahme der Einbaulageinformation mitgeteilt.After installation of the pressure transmitter, its installation position is determined by the mechanical and constructive fastening in the process plant and keeps it stable without further intervention. As part of the commissioning of the pressure transmitter whose actual mounting position is determined in the process plant and communicated to the unit for receiving the mounting position information.
Bereits während der Installation und der Inbetriebnahme des Druckmessumformers wird mittels des Temperatursensors die Temperatur des fluiden Druckmittlers gemessen. Demgemäß liegen nach der Inbetriebnahme des Druckmessumformers alle erforderlichen Daten zur Korrektur der temperaturabhängigen Messwertverfälschung aus der Wirkung der Erdbeschleunigung auf die Masse des fluiden Druckmittlers vor, aus denen mittels der Korrektureinheit ein Korrekturwert ermittelt wird, mit dem der verfälschte Messwert des Druckmessumformers korrigiert wird.During the installation and commissioning of the pressure transmitter, the temperature of the fluid diaphragm seal is measured by means of the temperature sensor. Accordingly, after commissioning of the pressure transmitter all the necessary data for correcting the temperature-dependent Meßwertverfälschung from the effect of gravitational acceleration on the mass of the fluid pressure transmitter, from which a correction value is determined by means of the correction unit, with which the falsified measured value of the pressure transducer is corrected.
Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert. Die dazu erforderlichen Zeichnungen zeigen:The invention will be explained in more detail below with reference to embodiments. The necessary drawings show:
In
In Abhängigkeit von der Einbaulage des Druckmessumformer und damit der Masseverteilung des Druckmittlers
In
In jeder anderen, von
In der
Der Druckmessumformer weist ferner einen Temperatursensor
Der Temperatursensor
In einer ersten Ausführungsform der Erfindung weist die Einheit
Bereits während der Installation und der Inbetriebnahme des Druckmessumformers wird mittels des Temperatursensors
In der
Im Rahmen der Inbetriebnahme des Druckmessumformers wird dessen tatsächliche Einbaulage in der Prozessanlage bestimmt und an eine übergeordnete Einrichtung übertragen und in dieser gespeichert. Die Einbaulagedaten werden im Wege der Datenfernübertragung an den Druckmessumformer gesendet. Der Druckmessumformer empfängt die Einbaulagedaten an seiner Kommunikationsschnittstelle
Die Korrektureinheit
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1010
- Messzellecell
- 11, 1211, 12
- Messkammermeasuring chamber
- 1313
- DruckmittlerDiaphragm Seals
- 14, 1514, 15
- Trennmembranseparating membrane
- 16, 1716, 17
- Messwiderstandmeasuring resistor
- 2121
- Temperatursensortemperature sensor
- 2222
- Vorverarbeitungpreprocessing
- 2323
- Korrektureinheitcorrection unit
- 2424
- Einheit zur Entgegennahme der EinbaulageinformationUnit for receiving the installation position information
- 241241
- Bedieneinheitoperating unit
- 242242
- Eingabeeinheitinput unit
- 243243
- KommunikationsschnittstelleCommunication Interface
- 31, 3231, 32
- Prozessdruckprocess pressure
- 4040
- Schwerkraftgravity
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 20019067 [0002] DE 20019067 [0002]
- DE 20019067 U [0003] DE 20019067 U [0003]
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011109495.8A DE102011109495B4 (en) | 2011-08-04 | 2011-08-04 | Pressure transmitter with piezoresistive sensors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011109495.8A DE102011109495B4 (en) | 2011-08-04 | 2011-08-04 | Pressure transmitter with piezoresistive sensors |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102011109495A1 true DE102011109495A1 (en) | 2013-02-07 |
DE102011109495B4 DE102011109495B4 (en) | 2020-09-03 |
Family
ID=47554132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011109495.8A Active DE102011109495B4 (en) | 2011-08-04 | 2011-08-04 | Pressure transmitter with piezoresistive sensors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102011109495B4 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20019067U1 (en) | 2000-11-09 | 2001-01-18 | Abb Patent Gmbh | Pressure measuring device |
US20080042863A1 (en) * | 2006-08-16 | 2008-02-21 | Rosemount, Inc. | Inclination measurement in process transmitters |
-
2011
- 2011-08-04 DE DE102011109495.8A patent/DE102011109495B4/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20019067U1 (en) | 2000-11-09 | 2001-01-18 | Abb Patent Gmbh | Pressure measuring device |
US20080042863A1 (en) * | 2006-08-16 | 2008-02-21 | Rosemount, Inc. | Inclination measurement in process transmitters |
Also Published As
Publication number | Publication date |
---|---|
DE102011109495B4 (en) | 2020-09-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69023930T2 (en) | MEASURING PROCESSOR WITH EXTENDED MEASURABILITY AND PROPORTIONALLY USEABLE MEANS FOR OVERLOAD PROTECTION. | |
EP1299701B1 (en) | Differential pressure sensor | |
EP2726833A1 (en) | Method for operating an absolute pressure or relative pressure sensor with a capacitive transducer | |
DE102011055284A1 (en) | Implantable pressure measuring device | |
WO2008046769A2 (en) | Pressure gauge | |
DE102015001500A1 (en) | Method for calibrating at least one sensor, in particular a pressure sensor, with at least one signal-conducting connection to at least one signal converter | |
DE102008041942A1 (en) | Sensor arrangement, method for operating a sensor arrangement and method for producing a sensor arrangement | |
DE3621795A1 (en) | DIFFERENTIAL PRESSURE | |
DE202011110182U1 (en) | Pressure transmitter with piezoresistive sensors | |
DE102011109495A1 (en) | Pressure transmitter for determination of process pressures in process plants, has piezoresistive sensors and hydraulic power transmission unit for determining the pressures, and electronic circuit for preprocessing the sensed readings | |
DE102009000071A1 (en) | Capacitive pressure sensor | |
DE102011002900A1 (en) | Pressure Transmitter | |
DE102011080229A1 (en) | Method for checking the function of a pressure sensor | |
EP2554964A2 (en) | Pressure and temperature measuring device | |
EP2543979A2 (en) | Pressure transducer | |
EP3800454B1 (en) | Detection system for a fluid line, fluid line system and air conditioning system | |
DE102012210331A1 (en) | Surge arrester for high voltages | |
DE102011109355B4 (en) | Process for correcting falsified measured values in pressure transmitters with piezoresistive sensors | |
DE10229702A1 (en) | transmitter | |
DE102012112971A1 (en) | Method for monitoring a membrane pressure transmitter, involves setting test conditions, in which separating membrane is subjected relative to reference pressure with defined pressure | |
WO2010003432A1 (en) | Method for calibrating a pressure transducer and pressure transducer | |
DE20107260U1 (en) | Transmission fluid for pressure measurement technology and its application | |
EP2784461B1 (en) | Pressure measurement cell for detecting the pressure of a medium adjoining the measurement cell | |
DE102013113690A1 (en) | Pressure gauge and method for its commissioning at a site | |
DE102017213354A1 (en) | Micromechanical pressure sensor device and corresponding manufacturing method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R016 | Response to examination communication | ||
R081 | Change of applicant/patentee |
Owner name: ABB SCHWEIZ AG, CH Free format text: FORMER OWNER: ABB TECHNOLOGY AG, ZUERICH, CH |
|
R082 | Change of representative |
Representative=s name: MAIWALD GMBH, DE Representative=s name: MAIWALD PATENTANWALTS- UND RECHTSANWALTSGESELL, DE |
|
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |