EP1301914B1 - Messeinrichtung zur messung einer prozessvariablen - Google Patents
Messeinrichtung zur messung einer prozessvariablen Download PDFInfo
- Publication number
- EP1301914B1 EP1301914B1 EP01947296A EP01947296A EP1301914B1 EP 1301914 B1 EP1301914 B1 EP 1301914B1 EP 01947296 A EP01947296 A EP 01947296A EP 01947296 A EP01947296 A EP 01947296A EP 1301914 B1 EP1301914 B1 EP 1301914B1
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- EP
- European Patent Office
- Prior art keywords
- current
- measuring device
- power
- microprocessor
- measuring
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
Definitions
- the invention relates to a measuring device for measuring an industrial Process variables for a given maximum power consumption by the Measuring device. More particularly, the invention relates to a measuring device for Connection to a current loop, in particular a 4-20 mA current loop, or to digital communication.
- Means for measuring a process variable are used to measure a Process variable to record and the measured values for subsequent Pass on processing.
- the measured values can be passed on via a current loop happen or via digital communication. In both It is advantageous if the measuring device derives its required power from the from both lines, through which the measured value is passed on.
- the current in the Current loop set so that its size is the size of the process variable reflects.
- a current has prevailed today, the currents between 4 mA and 20 mA, with a current of 4 mA through the Current loop the maximum (or minimum) measured value and a current of 20 mA represents the minimum (or maximum) measured value of the process variable.
- Measuring devices that are controlled via digital communication, often have a constant current draw as this is for data transmission necessary is. Here the available performance depends on the applied terminal voltage. Conventional measuring devices are also here designed so that the measuring circuit has a constant power consumption, the corresponds to the power with minimum supply voltage. additionally Offered power with a larger supply voltage is also here Power loss implemented.
- the object of the invention is a measuring device of the type mentioned to be specified which is capable of displaying the measured value incorrectly, adapt their performance requirements to the available performance.
- the total power consumed should be as accurate as possible Fulfillment of the measurement task that, on the one hand, speed and quality of the measurement can be optimized.
- the entire Power that corresponds to the measured value to be displayed by the correspondingly frequent function of the sensor is used up. In practice but for safety's sake there is still a certain difference between the Available power and used to fulfill the measurement task Performance remains, so there is no performance deficit and therefore no malfunction of the sensor can arise.
- the excess of power is in the Measuring device converted into power loss (heat).
- the sum of both The services received must be so large that the total of the Sensor current consumed corresponds to a defined value. That value is for the sensor within a current loop (4 - 20 mA) by the current specified measured value to be output.
- the value of corresponds to constant current consumed in connection with the general requirements with the communication protocol used.
- the Invention the desired adjustment to perform the measurement task power consumed to the power available without it Exceeding enables the current excess of power, the should be converted into power loss, is determined. After investigation of this current excess, the control unit of the sensor is able to through appropriate measures regarding the type and frequency of implementation of the Measuring cycles the power consumption of the measuring device to the predetermined maximum to approximate available power so that the excess is minimized without to fall below a certain predetermined limit for the surplus. (Ideal the excess at this limit is at least approximately zero.)
- the current surplus can be determined either by direct Measurement of the excess current or the excess power. But it is also possible indirectly, by measuring current or power consumed for carrying out the measuring task and measuring available performance or knowledge of available Current to determine the current excess via difference. If you choose that By way of indirect surplus determination, one can make a significant simplification achieve with little disadvantage that on single measurements for the determination of current or power is dispensed with and this by suitable Estimates and compliance with larger reserves are replaced.
- the invention is suitable for any measuring devices for process variables, if these measuring devices have external power consumption, usually one varying maximum power consumption is specified. It is about for example, the specification of the power consumption when using a current loop, because here (varying with the measured value to be displayed) only the maximum amount of power that may be consumed corresponds to the current, that flow in the supply lines to display the correct measured value can.
- the Measuring device may consume from other points of view, for example when connecting to digital communication or off completely different reasons.
- the invention is particularly suitable for sensors such as, for example Liquid level sensors.
- sensors such as, for example Liquid level sensors.
- the invention will now be described with reference to two Described embodiments which are, on the one hand, a radar level sensor, on the other hand, it is an ultrasonic level sensor.
- Such sensors are regularly used today via current loops or digital ones Communications (Profibus PA, Fieldbus Foundation, ...) are operated and are therefore exposed to the difficulties to be overcome according to the invention.
- a preferred implementation of the invention uses a current stage that generally switched on parallel to the other components of the measuring device becomes.
- the current stage serves to consume the power ("power loss"), which is left if you look at the total (through the measured value display function) predetermined power the power requirement of the measuring device deducted in measurement mode. This unused excess power is as stated, a measure of the reserve in the system for an increase the measuring performance is still available without it being the same as in the prior art Technology (EP 0 687 375) specified deficit comes.
- Such a current stage offers various options for measuring the Excess power, as in the following using exemplary embodiments will be described later.
- the current excess power can be measured directly. He can alternatively be predicted.
- Known data can be used for this the measuring device, for example the relatively large power consumption of individual Components.
- connection of the measuring device to or from digital communication connected current loop enables completely analog measures to achieve of the same advantages.
- FIGS. 1, 2 or 7 corresponds, as well as a connection to the supply according to Figures 3 to 6 or 8 to 13.
- a first exemplary embodiment of a measuring arrangement according to the invention is a radar level sensor.
- the sensor measures the level in one Container.
- the measured value is either via a current loop with e.g. 4 - 20 mA or via digital communication, e.g. a fieldbus, passed.
- Figure 1 shows part of such a radar sensor (101). The is shown generic part that is independent of how the measured value is passed on.
- a power supply unit (102) is used to supply energy to the sensor (101) Supply lines (14) and (15) are connected to a current stage.
- the sensor is controlled by a microcontroller (106), whose program is in a program memory (107). He uses one for his data EEPROM (109) and RAM (108).
- the microcontroller controls the HF front end (103), which generates radar signals, sends them to the antenna (114) and the received signals processed. These signals are received by the receiver (104) processed and digitized by means of an A / D converter (105) to the Microcontroller forwarded.
- the microcontroller determines from the digital signals a measured value. He transfers this after a possible conversion a control line (16) to the current stage (see below), which depending on a current, or to the digital interface that the measured value passes on via digital communication.
- the control lines (16) and (17) are used as a connection to the digital interface.
- the microcontroller has the option of using the HF front end, the receiver or other circuit parts via standby signals in to put an idle state with reduced power consumption, or switch it off completely, as described below.
- To measure the Current power consumption of the sensor may be used for measuring lines (18) - (20) and an A / D converter (110), which is connected to the microcontroller (106) connected is.
- the microcontroller has a reduced mode Current consumption. Capacitors (111), (112), and (113) reduce the Current fluctuations that occur when the components are switched on and off.
- FIG. 2 shows a second exemplary embodiment of a similar structure Ultrasonic sensor.
- the sensor is controlled by a microcontroller (206), whose program is in a program memory (207). He uses an EEPROM (209) and a RAM (208) for its data.
- a microcontroller 206
- He uses an EEPROM (209) and a RAM (208) for its data.
- the microcontroller controls the ultrasound transmitter (203), the control signals for provides the transducer (214).
- the sound transducer (214) thereby generates Sound waves emitted and emitted by a reflective medium be thrown back.
- the sound converter converts the received signals into electrical signals supplied to the receiver (204). This reinforces and filters the signal before it is sent from the microcontroller by means of an A / D converter (205) (206) is detected. From this, the microcontroller (206) determines a measured value, the after a possible conversion via the control line (16) to the Current stage, which adjusts a current depending on it, or to the digital one Passes on interface that forwards it via digital communication.
- FIG. 3 A first preferred implementation of the solution according to the invention for the Exemplary embodiments according to FIGS. 1 and 2 are shown in FIG. 3. She serves to measure the excess power needed to optimize the Measuring device operation is available in each case, by means of a current stage (302).
- the measuring device in Figure 3 is connected with a current loop over the Connections (11) and (12) supplied with power.
- the current stage (302) is parallel to the rest of the circuit of the measuring device connected.
- the current stage monitors the total current via the Voltage drop across a resistor (R301) and keeps it constant.
- the current is regulated by the current stage so that the total current through the Resistor (R301) remains constant and that through the control line (16) corresponds to the specified value.
- the current that flows into the terminals of the measuring device is divided into one Share that flows into the supply line (14) and a share that flows into the Current stage (302) flows.
- the current through the supply line (14) is from the Measuring device used to work, the current through the current stage not used for supplying the measuring device, it is a measure of the current surplus.
- the microcontroller measures this excess, in Figure 3 shown as a voltage measurement across a resistor (R302), and adjusts the power consumption of the sensor so that there is always sufficient even if the smallest possible excess is available.
- the decreases Excess, parts of the measuring device e.g. the transmitter and Reception area, or the entire signal generation and Processing area
- the current stage has the possibility to compensate for short-term fluctuations in the current account, without a deficit. Fluctuations can e.g. a short time increased power consumption or a fluctuation in the supply voltage his.
- Figure 4 shows alternative ways to build the current stage (402). She is here in line with the supply lines (14, 15). It is a zener diode (403) (alternatively, an electronic circuit that uses a variable Current consumption depending on the voltage). (The electronic circuit is usually preferred.)
- the total current of the complete measuring device over a Resistance (R401) felt and regulated accordingly.
- the stream divides after the current stage on in a part that is used to supply the measuring device is used (supply line + (14)) and an excess part that is picked up by the Z diode. The excess is measured about the voltage drop across a resistor (R402) because the current through (R402) is a measure of the current power surplus.
- the determination of the surplus power becomes more precise if one additionally measures the voltage on the supply line + (14) with the measuring line (18).
- FIG. 13 shows an improved circuit compared to FIG. 4.
- a Current stage (1302) is connected in series to the supply lines. Your is one Circuit (1303) downstream, which consumes excess power. To she feels the voltage on the supply line + (14) and with the help of a line (1304) the voltage before the current stage.
- the circuit (1303) takes exactly so much current that the voltage drop across the current stage (1302) to Reduction of power loss becomes as small as possible, but remains large enough, so that the current stage can keep the current constant, even if there are fluctuations the supply voltages or the current consumption of the sensor. On The excess power is therefore a measure of the current through the Circuit (1303) which e.g. via the voltage drop at (R1302) using the Measuring line (20) is measured.
- the determination of the surplus power becomes more precise if one additionally measures the voltage on the supply line + (14) with the measuring line (18).
- FIG. 5 shows a current stage (502) comparable to that in FIG. 3. in the The difference here is not the current power surplus directly measured.
- the current requirement of the Measuring device determined. From the difference between the known current, which in the current loop flows, and the current demand of the measuring device through (R502) a measure of the excess can be derived. Here too, the excess Performance more precisely through an additional measurement on the supply line + (14) available voltage is determined by measuring line (19) become.
- Figure 6 shows a current stage (602), similar to Figure 4.
- the measuring device according to FIG. 4 does not directly become the excess measured, but the input power at the terminals of the measuring device and the power consumption that the measuring device requires for supply, certainly.
- the input power results from the known current, which in the Current loop flows, and the input voltage measured via measuring line (19).
- the power consumption that the measuring device for supply is required from the current through (R602) and the via measuring line (18) measured supply voltage + (14).
- the difference between the two Services is a measure of the current surplus of services.
- the power consumption of the measuring device is often substantial determined by one or more large consumers. You get information One can make a statement about the power consumption of these components make the power consumption of the measuring device by e.g. for the unknown power consumption of the other components a worst case value accepts. In addition, the available power is determined how e.g. shown in Figures 3 to 6 and from it the excess power certainly. The microcontroller uses the excess power to determine whether Parts of the measuring device must be put into said idle state, to control the power consumption of the measuring device.
- Figure 7 shows this as a further preferred embodiment of the invention a radar sensor which with the help of a measuring line (715) a statement about the power consumption of the Receivers (704) receives. Whether the sensor uses a current loop or digital communication is irrelevant. At a This is an ultrasonic sensor or a sensor with radar guided on a rope same procedure feasible. The important thing here is just one or more Identify main consumers whose current power needs are determined.
- FIGS. 10 and 11 show further simplifications preferred according to the invention.
- only the current currently required is measured as a voltage drop across the resistor (R1002) using the measuring line (18) or via (R1102) using the measuring line (20).
- the microcontroller can regulate this current by controlling the idle states so that it always remains below the current available.
- the Current level (1202) keeps the current at times when there is no communication, constant.
- the digital interface (1203) receives the control line (16) from the microcontroller data to it in modulated form the current stage passes on, which changes the current accordingly.
- the kind of Modulation depends on the specifications of the digital used Communication off.
- Data is received by the signals on the Supply line + (14) or at the current stage (1202) from the digital Interface (1203) recognized and demodulated via the control line (17) to the Microcontrollers are forwarded.
- the measurement of the excess is as in Figure 3 already set out, realized by using the voltage drop over (R1202) the measuring line (18) is measured or additionally the voltage at the Supply line + (14) with the measuring line (19).
- the others are the same previously described method on measuring devices with digital communication applicable.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Radiation (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
Ausgehend von Figur 7 ist es möglich als weitere Vereinfachung nur den Leistungsbedarf eines oder mehrerer Hauptverbraucher zu bestimmen und davon abhängig die Ruhezustände der Komponenten zu steuern, ohne die zur Verfügung stehende Leistung zu bestimmen.
Claims (11)
- Meßeinrichtung zur Messung einer Prozeßvariablen bei vorgegebener maximaler Leistungsaufnahme durch die Meßeinrichtung, insbesondere zum Anschluß an eine Stromschleife, wie etwa eine 4 - 20 mA Stromschleife, oder an eine digitale Kommunikation, mit einer Einrichtung zur Regelung des Meßbetriebs der Meßeinrichtung in Anpassung an die vorgegebene Leistungsaufnahme, bei weicher die Regelungseinrichtung (302, 402, 502, 602, 802, 902, 1002, 1102, 1202, 1302; 403, 603, 903, 1103, 1203, 1303; 106, 206, 706) den Leistungsüberschuß, um den die vorgegebene Leistungsaufnahme der Meßeinrichtung (101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101, 1201, 1301) die Leistungsaufnahme für den Meßbetrieb der Meßeinrichtung (101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101, 1201, 1301) übersteigt, mißt oder vorausschätzt und den Meßbetrieb so regelt, daß diese Leistungsaufnahme der vorgegebenen Leistungsaufnahme angenähert wird, ohne daß die vorgegebene Leistungsaufnahme überschritten wird.
- Meßeinrichtung nach Anspruch 1, bei der die vorgegebene Leistungsaufnahme durch einen vorgegebenen Strom und/oder eine vorgegebene Versorgungsspannung bestimmt ist.
- Meßeinrichtung nach Anspruch 1, bei der die Regelungseinrichtung den Leistungsbedarf für den Meßbetrieb der Meßeinrichtung abhängig vom vorgegebenen Strom, von der Versorgungsspannung oder der aus beiden bestimmten Leistung einstellt.
- Meßeinrichtung nach Anspruch 1, bei der die Regelungseinrichtung den Leistungsbedarf für den Meßbetrieb der kompletten Meßeinrichtung bzw. wenigstens eines Hauptverbrauchers (704) der Meßeinrichtung (701) mißt oder vorausschätzt und den Meßbetrieb in Anspruch auf das Ergebnis regelt.
- Meßeinrichtung nach Ansprüchen 1 - 4, bei der die Regelungseinrichtung den Meßbetrieb so regelt, daß der Leistungsüberschuß minimiert wird.
- Meßeinrichtung nach einem der Ansprüche 1 - 5, zum Anschluß an eine Stromschleife (11,12) mit einem Mikroprozessor (106, 206, 706), einem Programmspeicher (107, 207, 707), der ein Programm zur Ausführung durch den Mikroprozessor speichert, einem oder mehreren EEPROM- und/oder RAM-Bausteinen (108, 208. 708; 109, 209, 709), Schaltungselementen (103, 104; 203, 204; 703, 704), die einen Betriebsmodus und einen stromsparenden Ruhezustand besitzen, und einer vom Mikroprozessor gesteuerten Stromstufe (302, 402, 502, 602, 802, 902, 1002, 1102, 1302), die die Größe eines in der Stromschleife fließenden Stromes derart regelt, daß sie auf vorgegebene Weise mit der Größe des Meßwertes der Prozeßvariablen korreliert, indem sie eine die Größe des Meßwertes übertreffende Überschußleistung in der Stromstufe in Verlustleistung umsetzt, wobei abhängig vom eingestellten Strom durch die Stromschleife und/oder abhängig von der Versorgungs-spannung die Ausführung des Meßprogramms vom Mikroprozessor unterbrochen wird.
- Meßeinrichtung nach Anspruch 6, bei der abhängig vom eingestellten Strom durch die Stromschleife und/oder von der Versorgungsspannung die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor eingestellt wird.
- Meßeinrichtung nach einem der Ansprüche 1 - 5, zum Anschluß an eine Stromschleife (11,12) mit einem Mikroprozessor (106, 206, 706), einem Programmspeicher (107, 207, 707), der ein Programm zur Ausführung durch den Mikroprozessor speichert, einem oder mehreren EEPROM- und/oder RAM-Bausteinen (108, 208, 708; 109, 209, 709), Schaltungselementen (103, 104; 203, 204; 703, 704), die einen Betriebsmodus und einen stromsparenden Ruhezustand besitzen, und einer vom Mikroprozessor gesteuerten Stromstufe (302, 402, 502, 1302), die den in der Stromschleife fließenden Stromes derart regelt, daß er auf bestimmte vorgegebene Weise mit dem Meßwert der Prozeßvariablen korreliert, indem sie eine Überschußleistung in der Stromstufe in Verlustleistung umsetzt, wobei die in der Stromstufe (302, 402, 502, 1302) in Verlustleistung umgesetzte Überschußleistung gemessen wird und, falls diese Überschußleistung über einem bestimmten vorgegebenen Wert liegt, die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor erhöht wird, und, falls die Überschußleistung unter einem bestimmten vorgegebenen Wert liegt, die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor erniedrigt wird.
- Meßeinrichtung nach einem der Ansprüche 1 - 5, zum Anschluß an eine digitale Kommunikation (8,9) mit einem Mikroprozessor (106, 206, 706), einem Programmspeicher (107, 207, 707), der ein Programm zur Ausführung durch den Mikroprozessor speichert, einem oder mehreren EEPROM- und/oder RAM-Bausteinen (108, 208. 708; 109, 209, 709), Schaltungselementen (103,104; 203, 204; 703, 704), die einen Betriebsmodus und einen stromsparenden Ruhezustand besitzen, und einer vom Mikroprozessor gesteuerten Stromstufe (1202), wobei abhängig von der Versorgungsspannung die Ausführung des Meßprogramms vom Mikroprozessor unterbrochen wird.
- Meßeinrichtung nach Anspruch 9, bei der abhängig von der Versorgungsspannung die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor eingestellt. wird.
- Meßeinrichtung nach einem der Ansprüche 1 - 5, zum Anschluß an eine digitale Kommunikation (8,9), mit einem Mikroprozessor (106, 206, 706), einem Programmspeicher (107, 207, 707), der ein Programm zur Ausführung durch den Mikroprozessor speichert, einem oder mehreren EEPROM- und/oder RAM-Bausteinen (108, 208, 708; 109, 209, 709), Schaltungselementen (103, 104; 203, 204; 703, 704), die einen Betriebsmodus und einen stromsparenden Ruhezustand besitzen, und einer vom Mikroprozessor gesteuerten Stromstufe (1202), die eine Überschußleistung in der Stromstufe in Verlustleistung umsetzt, wobei die in der Stromstufe (1202) in Verlustleistung umgesetzte Überschußleistung gemessen wird und, falls diese Überschußleistung über einem bestimmten vorgegebenen Wert liegt, die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor erhöht wird, und, falls die Überschußleistung unter einem bestimmten vorgegebenen Wert liegt, die Anzahl der Meßzyklen pro Zeitintervall vom Mikroprozessor erniedrigt wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE10034684A DE10034684A1 (de) | 2000-07-17 | 2000-07-17 | Meßeinrichtung zur Messung einer Prozeßvariablen |
DE10034684 | 2000-07-17 | ||
PCT/EP2001/005769 WO2002007124A1 (de) | 2000-07-17 | 2001-05-19 | Messeinrichtung zur messung einer prozessvariablen |
Publications (2)
Publication Number | Publication Date |
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EP1301914A1 EP1301914A1 (de) | 2003-04-16 |
EP1301914B1 true EP1301914B1 (de) | 2004-03-10 |
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ID=7649187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP01947296A Revoked EP1301914B1 (de) | 2000-07-17 | 2001-05-19 | Messeinrichtung zur messung einer prozessvariablen |
Country Status (6)
Country | Link |
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US (1) | US6512358B2 (de) |
EP (1) | EP1301914B1 (de) |
AT (1) | ATE261606T1 (de) |
AU (1) | AU2001269022A1 (de) |
DE (2) | DE10034684A1 (de) |
WO (1) | WO2002007124A1 (de) |
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US4718776A (en) * | 1985-08-12 | 1988-01-12 | Ball Corporation | Portable monitoring device and method |
DE3615463A1 (de) * | 1986-05-07 | 1987-11-12 | Endress Hauser Gmbh Co | Anordnung zur signaluebertragung in einer messanordnung |
DE3632840A1 (de) * | 1986-09-26 | 1988-04-07 | Endress Hauser Gmbh Co | Verfahren und anordnung zur uebertragung binaer codierter informationen in einer messanordnung |
US4804958A (en) * | 1987-10-09 | 1989-02-14 | Rosemount Inc. | Two-wire transmitter with threshold detection circuit |
DE3742119A1 (de) * | 1987-12-11 | 1989-06-22 | Siemens Ag | Datenverarbeitungssystem |
US4939455A (en) * | 1988-09-02 | 1990-07-03 | Hamilton Standard Controls, Inc. | Sensor having two-wire connection to load |
DE4019523A1 (de) * | 1990-06-19 | 1992-01-09 | Decher Dieter | Anordnung zum steuern des stromverbrauchs eines abnehmers |
FR2668257B1 (fr) * | 1990-10-18 | 1994-05-13 | Telemecanique | Detecteur du type deux fils a tension regulee. |
US5648766A (en) * | 1991-12-24 | 1997-07-15 | Motorola, Inc. | Circuit with supply voltage optimizer |
US5416723A (en) * | 1993-03-03 | 1995-05-16 | Milltronics Ltd. | Loop powered process control transmitter |
US5650571A (en) * | 1995-03-13 | 1997-07-22 | Freud; Paul J. | Low power signal processing and measurement apparatus |
EP0744724B1 (de) * | 1995-05-24 | 2001-08-08 | Endress + Hauser Gmbh + Co. | Anordnung zur leitungsgebundenen Energieversorgung eines Signalgebers vom Singnalempfänger |
DE19723645B4 (de) * | 1997-06-05 | 2006-04-13 | Endress + Hauser Gmbh + Co. Kg | Anordnung zur Signalübertragung zwischen einer Geberstelle und einer Empfangsstelle |
US5959372A (en) * | 1997-07-21 | 1999-09-28 | Emerson Electric Co. | Power management circuit |
DE59710058D1 (de) * | 1997-12-30 | 2003-06-12 | Endress & Hauser Gmbh & Co Kg | Messumformer-Speisegerät |
-
2000
- 2000-07-17 DE DE10034684A patent/DE10034684A1/de not_active Withdrawn
- 2000-12-07 US US09/730,557 patent/US6512358B2/en not_active Expired - Lifetime
-
2001
- 2001-05-19 AU AU2001269022A patent/AU2001269022A1/en not_active Abandoned
- 2001-05-19 DE DE50101670T patent/DE50101670D1/de not_active Revoked
- 2001-05-19 WO PCT/EP2001/005769 patent/WO2002007124A1/de active IP Right Grant
- 2001-05-19 AT AT01947296T patent/ATE261606T1/de not_active IP Right Cessation
- 2001-05-19 EP EP01947296A patent/EP1301914B1/de not_active Revoked
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008016940A1 (de) | 2008-04-01 | 2009-10-08 | Endress + Hauser Gmbh + Co. Kg | Verfahren zur Bestimmung und/oder Überwachung des Füllstands eines Mediums in einem Behälter |
DE102012109010A1 (de) | 2012-09-25 | 2014-03-27 | Endress + Hauser Gmbh + Co. Kg | Messgerät der Prozessautomatisierungstechnik |
US9891141B2 (en) | 2012-09-25 | 2018-02-13 | Endress + Hauser Gmbh + Co. Kg | Measuring device of process automation technology |
Also Published As
Publication number | Publication date |
---|---|
AU2001269022A1 (en) | 2002-01-30 |
DE10034684A1 (de) | 2002-01-31 |
DE50101670D1 (de) | 2004-04-15 |
ATE261606T1 (de) | 2004-03-15 |
US6512358B2 (en) | 2003-01-28 |
US20020005713A1 (en) | 2002-01-17 |
EP1301914A1 (de) | 2003-04-16 |
WO2002007124A1 (de) | 2002-01-24 |
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