EP3676579A1 - Système de mesure de pression différentielle - Google Patents

Système de mesure de pression différentielle

Info

Publication number
EP3676579A1
EP3676579A1 EP18740806.7A EP18740806A EP3676579A1 EP 3676579 A1 EP3676579 A1 EP 3676579A1 EP 18740806 A EP18740806 A EP 18740806A EP 3676579 A1 EP3676579 A1 EP 3676579A1
Authority
EP
European Patent Office
Prior art keywords
differential pressure
signal
processing
evaluation unit
temperature
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.)
Withdrawn
Application number
EP18740806.7A
Other languages
German (de)
English (en)
Inventor
Max JEHLE
Davide Parrotto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP3676579A1 publication Critical patent/EP3676579A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
    • G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • 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

Definitions

  • the invention relates to a differential pressure measuring arrangement and a method for monitoring a differential pressure measuring arrangement.
  • Differenz horrinsan extract with differential pressure lines are used in particular for flow measurement or filter monitoring, depending on a differential pressure line in
  • a differential pressure transducer such as a diaphragm or a venturi nozzle, or a filter are connected to a media-carrying line to the differential pressure by means of the medium to a
  • Differential pressure transducer to transfer the differential pressure measuring arrangement.
  • it can lead to blockages of the differential pressure lines, whereby a reliable measurement is impaired. Efforts are therefore known to detect the blockage of differential pressure lines early.
  • German patent application DE 1 0 2013 1 10 059 A1 describes a
  • Differential pressure measuring arrangement based on a correlation of a
  • Differential pressure measuring signal which represents a pressure difference between a first fluid pressure and a second fluid pressure
  • Temperature signal which correlates with a temperature of a differential pressure line, clogged differential pressure lines recognizes.
  • DE 1 0 2013 1 10 059 A1 provides that only the measured values (differential pressure and temperature) detected by the differential pressure measuring arrangement itself are used to detect the pre-plugged differential pressure lines. This has the consequence that false alarms or incorrectly detected clogged differential pressure lines can occur. For example. in the case that the temperature of the differential pressure line detected by a temperature sensor of the differential pressure measuring device increases slightly and at the same time the flow rate in the process is slowly increased, for example by increasing the rotational speed of a pump. In this case, a processing unit of the differential pressure measuring arrangement would detect a correlation between the temperature profile and the differential pressure and also an increased signal noise
  • Differential pressure measuring arrangement and a method to provide that allow a clogged differential pressure line with higher probability to correctly recognize and identify.
  • the object is achieved by the Differential pressure measuring arrangement according to claim 1 and the method according to claim 9.
  • the differential pressure measuring arrangement according to the invention comprises:
  • a differential pressure transducer for detecting the difference between a first media pressure and a second media pressure and for providing a differential pressure measurement signal which is the difference between a first
  • processing and / or evaluation unit is set up to use the differential pressure measurement signal and the temperature signal a significant
  • Process data which were preferably not detected by the differential pressure transducer, verify.
  • a differential pressure measuring arrangement which has a detected significant correlation between a change in the temperature signal and the differential pressure signal after they this as an indication of a clogged
  • Process data are, in particular, those data which relate to measured values and / or manipulated variables of a process in which the differential pressure measuring arrangement is used and which were not detected by the differential pressure measuring arrangement itself.
  • the further process data may, for example, be provided by field devices which in the process for setting and / or detecting the further process data, for example in the form of
  • Process variables used. Examples of such field devices are level gauges, mass flow meters, pressure and temperature measuring devices, pH redox potential measuring devices, conductivity meters, etc., which use the corresponding process variables level, flow, pressure, temperature, pH or
  • Detect conductivity value For influencing process variables serve so-called actuators, z.
  • actuators As valves that control the flow of a liquid in a pipe section or pumps that change the level in a container.
  • field devices all devices that are used close to the process and that supply or process process-relevant information in the form of process data are referred to as field devices. Under the term field device used in connection with the invention, all types of measuring devices and actuators are thus to be subsumed.
  • Differential pressure measuring arrangement further comprises a remotely located from the differential pressure transducer, preferably central data point, eg.
  • a process control system or a cloud comprises, wherein the differential pressure transducer comprises the processing and / or evaluation and the processing and / or evaluation unit is further adapted to the further process data from the Data point to
  • Differential pressure measuring arrangement further comprises a remote from the differential pressure transducer arranged, preferably central data point, for example.
  • a remote from the differential pressure transducer arranged, preferably central data point, for example.
  • a process control system or a cloud wherein the data point at least a first part of
  • Processing and / or evaluation unit comprises, wherein the first part of the processing and / or evaluation unit included in the data point is arranged to check whether the values indicative of a clogged differential pressure line based on further process data associated with the process, which preferably can not be verified by the differential pressure transducer.
  • Differential pressure transducer a second part of the processing and / or
  • Evaluation unit is arranged to use the differential pressure measuring signal and the temperature signal, a significant correlation between a change of
  • the embodiment can provide that the second part of the processing and / or evaluation unit is further configured to communicate the indication of a clogged differential pressure line to the first part of the processing and / or evaluation unit and the first part of the processing and / or evaluation unit Furthermore, it is set up to check, on the basis of the further process data associated with the process, whether the hint can be verified.
  • a further advantageous embodiment of the invention provides that the processing and / or evaluation is adapted to a positive correlation between a temperature signal change on the one hand, which corresponds to a temperature rise, and the differential pressure signal on the other hand, as an indication of a blockage of the first
  • Evaluate differential pressure line Yet another advantageous embodiment of the invention provides that the processing and / or evaluation device is adapted to a negative correlation between a temperature signal change on the one hand, the one
  • Differential pressure measuring signal to determine, and to take into account this parameter in the determination of a clogged differential pressure line.
  • the invention further relates to a method for monitoring a
  • Differential pressure transducer for detecting a difference between a first media pressure and a second media pressure and providing a
  • Differential pressure measuring signal which depends on the difference between a first media pressure and a second media pressure; a first differential pressure line connected to a first pressure input of the differential pressure transducer to pressurize the differential pressure transducer with the first medium pressure; a second active pressure line which is connected to a second pressure input of the
  • Differential pressure transducer is connected to pressurize the differential pressure transducer with the second medium pressure; and at least one temperature sensor for outputting a temperature signal having a temperature of
  • the method comprising the following method steps: a) at least temporarily detecting a time profile of the temperature signal and the differential pressure measuring signal,
  • Differential pressure signal as an indication of a clogged differential pressure line can be verified on the basis of further to the process associated process data, which were preferably not detected by the differential pressure transducer.
  • Process steps c) is carried out by a processing and / or evaluation unit arranged within the differential pressure transducer and, for carrying out the method step c), retrieving the further process data from a preferably central data location, for example a process control system or a cloud.
  • a processing and / or evaluation unit arranged within the differential pressure transducer and, for carrying out the method step c), retrieving the further process data from a preferably central data location, for example a process control system or a cloud.
  • Method step c) is arranged by a, preferably central data point, which is arranged outside the differential pressure transducer and has the further process data associated with the process.
  • the embodiment can provide that at least the method step b) of one within the
  • Differential pressure transducer arranged processing and / or evaluation unit is executed and the processing and / or evaluation transmitted the reference to a clogged differential pressure line to the data point, the data check using the other process data associated with the process, if the hint can be verified.
  • a further advantageous embodiment of the invention provides that the further process data associated with the process are detected by field devices which monitor and / or control the process, and the process data of the data location associated with the process are provided by the field devices.
  • An advantageous embodiment of the invention provides that the method further comprises an analysis of a smoking or a fluctuation of the differential pressure measuring signal, and the check whether the noise or the fluctuation point to a clogged differential pressure line.
  • An advantageous embodiment of the invention provides that a clogged
  • Impact pressure line is signaled when the values of the determination of the significant correlation between a change in the temperature signal and the
  • Differential pressure signal is verified as an indication of a clogged differential pressure line based on further process data associated with the process.
  • Fig. 1 a schematic representation of a first invention
  • Fig. 2 a schematic representation of a second invention
  • Embodiment of the differential pressure measuring arrangement The exemplary embodiments of a device according to the invention shown in FIGS. 1 and 2
  • Differential pressure measuring arrangement each comprise a differential pressure transducer 10, which is a sensor module 1 1, which between a first, high-pressure side
  • Process connection flange 13 is arranged, and an electronic module 1 5 having a processing and / or evaluation unit 14 which is held by the sensor module 1 1, the sensor module is supplied with energy and processes signals of the sensor module.
  • the electronic module is connected to a via a two-wire line 1 6
  • Process control system 41 is connected, wherein the electronic module 1 5 on the
  • Two-wire line 1 6 communicates and is powered.
  • the two-wire line 16 can be operated in particular as a field bus according to the Profibus or Foundation Fieldus standard or according to the HART standard.
  • Differential pressure transmitters 10 are known per se and are manufactured, for example, under the trademark Deltabar by the applicant and placed on the market.
  • Differential pressure measuring arrangement further comprises a differential pressure transducer 20 for installation in a pipeline 21st
  • the differential pressure transducer comprises a diaphragm 22, a first
  • the high-pressure side Prozeßan gleichflansch 12 is connected via a high pressure side Wirk réelle réelle 25 to the high-pressure side Druckabgriffkanal 23, and the low-pressure side Prozeßan gleichflansch is connected via a low-pressure side Wirk réelle effet 26 to the low-pressure side Druckabgriffkanal 24.
  • High back and “low pressure side” refer to a pressure difference produced by a flow (in the drawing from left to right) which is proportional to the square of the flow rate and is for example of the order of a few 10 to 1 00 mbar.
  • the static pressure that this flow-dependent pressure difference is superimposed for example, from 1 bar up to several 100 bar.
  • the pressure difference is detected by a sensor element of the sensor module 1 1, wherein the sensor module outputs a dependent of the detected pressure difference sensor module signal to the electronic module 1 5, wherein the processing and / or evaluation unit 14 of the electronic module 15 based on the sensor module signal a differential pressure signal representing the pressure difference generated and outputs via the two-wire line 1 6 to the process control system 41.
  • Time series of the differential pressure measuring signal and / or of fluctuations of the differential pressure measuring signal can be stored in a data memory of the electronic module and / or in the process control system.
  • the differential pressure measuring arrangement has a temperature sensor 30, which detects a temperature of the differential pressure lines. If it can be assumed that the temperature of the differential pressure lines is essentially the same, then it is sufficient
  • Temperature sensor off on the other hand, if strongly deviating temperature curves are to be expected, it may be advantageous in each case a temperature sensor for a
  • the temperature sensor 30 is connected to the electronic module 14, and provides this temperature measurement signals, each representing a currently measured temperature. Time series can be stored in the transmitter and / or in the control system of the temperature measurement signals or their fluctuations.
  • Time series of the differential pressure measuring signals are over a longer period of several hours, for example 8 to 16 hours in terms of their fluctuation and their noise and their correlation with the corresponding time series of
  • Increase differential pressure signal involves fluctuations in a frequency range of more than 1 Hz, in particular more than 10 Hz or more than 100 Hz.
  • Equation 1 only one third.
  • Temperature measurement signal and the differential pressure measurement signal is now given an independent approach to detecting a blockage, because if due to a
  • Blockage a medium is enclosed in a differential pressure line, so causes a change in temperature and a concomitant change in volume of the medium, a pressure change in the differential pressure line, which has a direct effect on the measured differential pressure. If the blockage is not yet complete, then in case of a temperature change medium must be above the resulting obstruction, acting as a choke acts to increase or decrease the volume compensation. This also causes in the affected differential pressure line a pressure change, which has an effect on the differential pressure measurement signal. A correlation between a change in the temperature measurement signal and the
  • Differential pressure signal independent indication of a blockage By combining the two aforementioned analysis methods, a statement about a detected blockage becomes more reliable, as explained below.
  • K) P (K
  • Differential pressure signal with changes in temperature reading goes to +1. If a blockage of the low-pressure-side differential pressure line 26 forms, the fluctuation of the differential pressure-measuring signal increases, and the correlation of the differential pressure measurement signal increases
  • Differential pressure signal with changes in the temperature reading goes to zero. If a blockage forms in both differential pressure lines, a decreasing fluctuation of the differential pressure measuring signal is to be expected, and the correlation of the differential pressure measuring signal with changes in the temperature measured value approaches zero.
  • the two discussed diagnostic routines can be periodically carried out for fluctuations in the differential pressure measuring signal and for correlations between temperature changes and the differential pressure measuring signal, wherein the condition indicated in the third column is determined as a function of the findings given in the first and second column.
  • Differential pressure transducer 10 is adapted to the verification itself
  • the processing and / or evaluation unit 14 can access a data location 40 to which the further process data of the process are supplied in order to carry out a verification based on this further process data 51.
  • the further process data 51 are detected by further field devices 50 that are in the process or serve to set the process by means of a
  • the further process data may, for example, be the desired value of the flow or the rotational speed of a pump.
  • the further process data 51 are in one
  • the further process data 51 can be kept, for example, in the process control system 41, which serves to guide the process in a plant.
  • the further process data 51 as shown in FIG. 2, can also be stored in a cloud 42, which additionally or alternatively to the
  • Process control system is provided, be kept. This can be the
  • Process control system also be formed by parts of the cloud, or run separately from it. In the latter case, the control of the system can be done via the field devices networked by the cloud, and the further process data 51 are held ready for retrieval by the processing and / or evaluation unit 14 in the central data location.
  • the processing and / or evaluation unit 14 may be designed such that it is located completely within the differential pressure transducer 10 or, as shown in FIG. 2, at least in a first part 14a and a second part 14b be split. In this case, only the second part 14b is within the differential pressure transducer 1 0 and is used to determine the significant correlation between the change in the temperature signal and the
  • Differential pressure transducer 1 depending on the design, either in the process control system 41 or the data point 40, eg. The cloud, and serves to note the detected by the second part 14 b reference to a clogged differential pressure line based on the other
  • Process data 51 to verify is also conceivable that the first part 14a is formed independently of the process control system 41 and / or the data point 40 and forms a separate unit.
  • Data location preferably central data location

Abstract

L'invention concerne un système de mesure de pression différentielle comprenant : un convertisseur de pression différentielle (10) servant à détecter et à délivrer un signal de mesure de pression différentielle qui est fonction d'une différence entre une première pression de fluide et une seconde pression de fluide ; une première conduite de pression différentielle (25) servant à soumettre le convertisseur de pression différentielle à la première pression de fluide ; une seconde conduite de pression différentielle (26) servant à soumettre le convertisseur de pression différentielle à la seconde pression de fluide ; au moins un capteur de température (30) émettant un signal de température qui est en corrélation avec une température des conduites de pression différentielle (25, 26) ; et une unité de traitement et/ou d'évaluation (14) servant à traiter le signal de mesure de pression différentielle et le signal de température. L'unité de traitement et/ou d'évaluation (14) est conçue pour définir, sur la base du signal de pression différentielle et du signal de température, une corrélation significative entre une variation du signal de température et le signal de pression différentielle, et l'évaluer en tant qu'indication de l'obstruction d'une conduite de pression différentielle, et est par ailleurs conçue pour vérifier si l'évaluation en tant qu'indication de l'obstruction d'une conduite de pression différentielle peut être confirmée sur la base d'autres données de processus (51) qui n'ont de préférence pas été détectées par le convertisseur de pression différentielle (10).
EP18740806.7A 2017-08-31 2018-07-12 Système de mesure de pression différentielle Withdrawn EP3676579A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017120021.5A DE102017120021A1 (de) 2017-08-31 2017-08-31 Differenzdruckmessanordnung
PCT/EP2018/068936 WO2019042642A1 (fr) 2017-08-31 2018-07-12 Système de mesure de pression différentielle

Publications (1)

Publication Number Publication Date
EP3676579A1 true EP3676579A1 (fr) 2020-07-08

Family

ID=62916668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18740806.7A Withdrawn EP3676579A1 (fr) 2017-08-31 2018-07-12 Système de mesure de pression différentielle

Country Status (5)

Country Link
US (1) US10732015B2 (fr)
EP (1) EP3676579A1 (fr)
CN (1) CN111051827B (fr)
DE (1) DE102017120021A1 (fr)
WO (1) WO2019042642A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11965790B2 (en) * 2020-07-03 2024-04-23 Honeywell International Inc. Sensor diagnostic method and system for pressure transmitter
CN113483948B (zh) * 2021-07-13 2023-09-12 无锡威孚力达催化净化器有限责任公司 一种压差管检测装置及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7254518B2 (en) * 1996-03-28 2007-08-07 Rosemount Inc. Pressure transmitter with diagnostics
US5680109A (en) * 1996-06-21 1997-10-21 The Foxboro Company Impulse line blockage detector systems and methods
DE102006005143A1 (de) * 2006-02-04 2007-08-09 Continental Aktiengesellschaft Verfahren zur Plausibilitätsüberprüfung von Messwerten für eine Reifendrucküberwachung von Fahrzeugen
WO2008083720A1 (fr) 2007-01-12 2008-07-17 Siemens Aktiengesellschaft Transducteur de mesure de pression et procédé de fonctionnement d'un transducteur de mesure de pression
US7860669B2 (en) * 2008-06-17 2010-12-28 Saudi Arabian Oil Company System, program product, and related methods for estimating and managing crude gravity in flowlines in real-time
US8516900B2 (en) * 2010-05-12 2013-08-27 Rosemount Inc. Multiphase flowmeter with batch separation
DE102013110059A1 (de) * 2013-09-12 2015-03-12 Endress + Hauser Gmbh + Co. Kg Differenzdruckmessanordnung mit Wirkdruckleitungen und Verfahren zum Erkennen von verstopften Wirkdruckleitungen
US9964533B2 (en) * 2015-11-12 2018-05-08 King Fahd University Of Petroleum And Minerals System for measuring multi-phase fluid flow characteristics

Also Published As

Publication number Publication date
CN111051827A (zh) 2020-04-21
US10732015B2 (en) 2020-08-04
CN111051827B (zh) 2021-10-08
US20200209023A1 (en) 2020-07-02
WO2019042642A1 (fr) 2019-03-07
DE102017120021A1 (de) 2019-02-28

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