DE4242630A1 - Fluid flow sensor automatic self-monitoring - comparing flow rate values read out from memory with actual values provided by A=D converter - Google Patents
Fluid flow sensor automatic self-monitoring - comparing flow rate values read out from memory with actual values provided by A=D converterInfo
- Publication number
- DE4242630A1 DE4242630A1 DE19924242630 DE4242630A DE4242630A1 DE 4242630 A1 DE4242630 A1 DE 4242630A1 DE 19924242630 DE19924242630 DE 19924242630 DE 4242630 A DE4242630 A DE 4242630A DE 4242630 A1 DE4242630 A1 DE 4242630A1
- Authority
- DE
- Germany
- Prior art keywords
- values
- flow sensor
- memory
- flow
- monitoring
- 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
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
- G01F1/363—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 with electrical or electro-mechanical indication
-
- 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
- G01F1/50—Correcting or compensating means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Durchflußsensoren für Fluide, insbesondere thermische und mit Bypässen ausgestattete, können auf Grund von Verschmutzung der Durchflußkanäle oder Änderung der Meßwertaufnehmer oder Fehler in der Auswerteelektronik Meßwertverfälschungen produzieren.Flow sensors for fluids, especially thermal and with Bypasses equipped, can due to pollution of the Flow channels or change of the sensor or errors produce false readings in the evaluation electronics.
Erfindungsgemäß wird eine Selbstüberwachung des Durchflußsensors (1) mit einem elektronischen Differenzdrucksensor (2) vorgenommen, dessen Meßwerte einen Lesespeicher (5) ansteuern, in dem die Durchflußwerte für die ursprünglichen Differenzdrücke abgelegt sind. Die aktuellen Meßwerte des Durchflußsensors (1) werden mit dem aus dem Lesespeicher (5) ausgelesenen Durchflußwerten in einem Komparator (6) verglichen und der Ausgangszustand des Komparators (6) mit einem Melder (7) gemeldet. Mit einem Steuerglied (14) kann eine Toleranzschwelle als zulässiger Fehler zwischen dem aktuellen Durchflußwert des Durchflußsensors (1) und den ausgelesenen Durchflußwerten aus dem Lesespeicher (5) eingestellt werden.According to the invention, the flow sensor ( 1 ) is self-monitored with an electronic differential pressure sensor ( 2 ), the measured values of which control a read memory ( 5 ) in which the flow values for the original differential pressures are stored. The current measured values of the flow sensor ( 1 ) are compared with the flow values read from the read memory ( 5 ) in a comparator ( 6 ) and the initial state of the comparator ( 6 ) is reported with a detector ( 7 ). With a control element ( 14 ), a tolerance threshold can be set as a permissible error between the current flow value of the flow sensor ( 1 ) and the read flow values from the read memory ( 5 ).
Fig. 1 zeigt eine Realisierung für eine Durchflußsensorselbst überwachung des Durchflußsensors (1) mit einem Differenzdruck senor (2). Ein Oszillator (8) schaltet die Schalter (9, 10) im Takt um in der Weise, daß die analogen Meßwerte des Durchflußsensors (1) und des Differenzdrucksensors (2) über den Analog-Digitalwandler (11) auf die Abtast-Halteschaltungen (12), 13) geschaltet werden. Die Abtast-Halteschaltung (12) steuert den Lesespeicher (5) an, dessen ausgelesene Werte mit den Werten der Abtast-Halteschaltung (13) in dem Komparator (6) verglichen werden, dessen Ausgangszustand mit dem Melder (7) gemeldet wird. Fig. 1 shows a realization for a flow sensor self-monitoring of the flow sensor ( 1 ) with a differential pressure sensor ( 2 ). An oscillator ( 8 ) switches the switches ( 9 , 10 ) clockwise in such a way that the analog measured values of the flow sensor ( 1 ) and the differential pressure sensor ( 2 ) via the analog-digital converter ( 11 ) to the sample and hold circuits ( 12 ), 13 ) can be switched. The sample-and-hold circuit ( 12 ) controls the read-only memory ( 5 ), the read values of which are compared with the values of the sample-and-hold circuit ( 13 ) in the comparator ( 6 ), the output state of which is reported by the detector ( 7 ).
Fig. 2 zeigt eine Realisierung des Durchflußselbstüberwachung mit zwei Analog-Digitalwandlern (12, 13). Fig. 2 shows a realization of the flow self-monitoring with two analog-digital converters ( 12 , 13 ).
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924242630 DE4242630C2 (en) | 1992-12-17 | 1992-12-17 | Flow self-monitoring device and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924242630 DE4242630C2 (en) | 1992-12-17 | 1992-12-17 | Flow self-monitoring device and method |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4242630A1 true DE4242630A1 (en) | 1994-05-26 |
DE4242630C2 DE4242630C2 (en) | 2002-09-26 |
Family
ID=6475540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924242630 Expired - Fee Related DE4242630C2 (en) | 1992-12-17 | 1992-12-17 | Flow self-monitoring device and method |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4242630C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2103883A1 (en) * | 2008-03-20 | 2009-09-23 | Daikin Industries, Ltd. | Heating and/or cooling installation and method for alternatively monitoring the operability of a flow switch in such an installation and of the installation |
US9359668B2 (en) | 2011-09-02 | 2016-06-07 | First Solar, Inc. | Feeder system and method for a vapor transport deposition system |
DE10255698B4 (en) * | 2002-11-29 | 2021-06-24 | Abb Ag | Method for operating a flow measuring device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553489A (en) * | 1967-02-16 | 1969-01-10 | ||
DE3003599A1 (en) * | 1979-02-07 | 1980-10-09 | Itt Ind Gmbh Deutsche | MEASURING SYSTEM |
DE3709776A1 (en) * | 1987-03-25 | 1988-10-06 | Eckardt Ag | Method of measuring the flow of a medium through a pipeline or the like |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3550426A (en) * | 1969-03-18 | 1970-12-29 | Rotron Inc | Fluid meter field checking method and apparatus |
US4821557A (en) * | 1988-03-08 | 1989-04-18 | Arkla, Inc. | Method and apparatus for determining the accuracy of a gas flow meter |
-
1992
- 1992-12-17 DE DE19924242630 patent/DE4242630C2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553489A (en) * | 1967-02-16 | 1969-01-10 | ||
DE3003599A1 (en) * | 1979-02-07 | 1980-10-09 | Itt Ind Gmbh Deutsche | MEASURING SYSTEM |
DE3709776A1 (en) * | 1987-03-25 | 1988-10-06 | Eckardt Ag | Method of measuring the flow of a medium through a pipeline or the like |
Non-Patent Citations (1)
Title |
---|
JP 2-17419 A. In. Patents Abstracts of Japan, P-1028, March 28, 1990, Vol.14,No.160 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10255698B4 (en) * | 2002-11-29 | 2021-06-24 | Abb Ag | Method for operating a flow measuring device |
EP2103883A1 (en) * | 2008-03-20 | 2009-09-23 | Daikin Industries, Ltd. | Heating and/or cooling installation and method for alternatively monitoring the operability of a flow switch in such an installation and of the installation |
EP2204620A3 (en) * | 2008-03-20 | 2010-09-22 | Daikin Industries, Ltd. | Heating and/or cooling installation and method for monitoring the operability of the installation |
US9359668B2 (en) | 2011-09-02 | 2016-06-07 | First Solar, Inc. | Feeder system and method for a vapor transport deposition system |
Also Published As
Publication number | Publication date |
---|---|
DE4242630C2 (en) | 2002-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |