DE9319051U1 - Circuit arrangement of a measuring device - Google Patents
Circuit arrangement of a measuring deviceInfo
- Publication number
- DE9319051U1 DE9319051U1 DE9319051U DE9319051U DE9319051U1 DE 9319051 U1 DE9319051 U1 DE 9319051U1 DE 9319051 U DE9319051 U DE 9319051U DE 9319051 U DE9319051 U DE 9319051U DE 9319051 U1 DE9319051 U1 DE 9319051U1
- Authority
- DE
- Germany
- Prior art keywords
- input
- measuring
- physical quantity
- circuit
- measuring device
- 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.)
- Expired - Lifetime
Links
- 230000006978 adaptation Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 4
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
- G01D1/16—Measuring arrangements giving results other than momentary value of variable, of general application giving a value which is a function of two or more values, e.g. product or ratio
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
- Tests Of Electronic Circuits (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
SK-Presov
Slowakische RepublikSK-Presov
Slovak Republic
- 1- 1
Die Erfindung betrifft die SchaLtanordnung eines Meßgerätes zum Messen physikaLischer Größen, insbesondere in der Elektroindustrie, die durch zwei oder mehrere Eingangsgrößen, z.B. Messung des Widerstandes, der Leistung, der Arbeit oder aber auch anderer Größen mit direktem Ablesen des gemessenen Wertes vom Display, definiert sind.The invention relates to the circuit arrangement of a measuring device for measuring physical quantities, in particular in the electrical industry, which are defined by two or more input quantities, e.g. measurement of resistance, power, work or other quantities with direct reading of the measured value from the display.
Messungen physikalischer Größen, z.B. der Leistung, der Arbeit oder des Widerstandes, die durch zwei oder mehrere Eingangsgrößen definiert sind, sind umständlich und zeitint ensi&ngr;. Die Messung erfolgt hierbei regelmäßig mit hierzu vorgesehenen Meßgeräten, z.B. Spannungs-, Strom-oder Widerstandsmessern, und der gemessene Betrag wird durch Berechnung festgestellt. Beim Messen des elektrischen Widerstandes wird der Endbetrag durch Berechnung gemessener Werte, nämlich der Spannung und des Stromes, am unbekannten Widerstand nach der Formel R = U / I bestimmt. Daher sind hierfür mindestens zweiMeasurements of physical quantities, e.g. power, work or resistance, which are defined by two or more input quantities, are cumbersome and time-consuming. The measurement is usually carried out using measuring devices designed for this purpose, e.g. voltage, current or resistance meters, and the measured value is determined by calculation. When measuring electrical resistance, the final value is determined by calculating measured values, namely the voltage and current, on the unknown resistance according to the formula R = U / I. Therefore, at least two
A 9689 - a/n - 2A 9689 - a/n - 2
Meßgeräte erforderlich, wobei die Anzahl, der Meßgeräte durch die Anzahl, der Eingangsgrößen, hier U und I, bestimmt wird. Erst danach wird der eigentlich interessierende Wert, hier der Widerstand R, durch Berechnung ermittelt. Eine solche Vorgehensweise ist nicht nur kosten-, sondern auch zeitint ensi&ngr;.Measuring devices are required, whereby the number of measuring devices is determined by the number of input variables, here U and I. Only then is the actual value of interest, here the resistance R, determined by calculation. Such an approach is not only costly, but also time-consuming.
Ausgehend von dem obigen Stand der Technik liegt der Erfindung die Aufgabe zugrunde, hier Abhilfe zu schaffen.Based on the above prior art, the invention is based on the object of remedying this situation.
Die gestellte Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.The stated object is achieved according to the invention by the features of claim 1.
Alternativ hierzu kann zwischen den Eingang der ersten physikalischen Größe und den Eingang der zweiten physikalischen Größe ein Vergleichswiderstand (Etalon) sowie ein unbekannter Widerstand geschaltet werden, die an die Sekundärwicklung eines Transformators angeschlossen sind. Durch diese Schaltung ist es möglich, den Betrag der gemessenen physikalischen Größen direkt abzulesen. Das Endergebnis wird durch EDV-Technik berechnet und in einem Speicher gespeichert, wobei während des Messens nur derjenige Betrag aus dem Speicher herausgeholt wird, der den gerade gemessenen Werten der eingangs gemessenen physikalischen Größen entspricht.Alternatively, a comparison resistor (etalon) and an unknown resistor can be connected between the input of the first physical quantity and the input of the second physical quantity, which are connected to the secondary winding of a transformer. This circuit makes it possible to read the amount of the measured physical quantities directly. The end result is calculated using computer technology and stored in a memory, whereby during the measurement only the amount is taken out of the memory that corresponds to the values of the physical quantities measured at the beginning.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher erläutert. Es zeigenAn embodiment of the invention is shown schematically in the drawing and is explained in more detail below.
Fig. 1 eine allgemeine Schaltung undFig. 1 a general circuit and
A 9689 - a/n - 3 -A 9689 - a/n - 3 -
Fig. 2 ein konkretes AusführungsbeispieL der Erfindung mit einem Meßgerät zum Messen von Durchgangswiderständen.Fig. 2 shows a concrete embodiment of the invention with a measuring device for measuring volume resistances.
Der Eingang 1 für die erste gemessene physikalische Größe ist angeschlossen an einen ersten Anpassungsschaltkreis 11, wobei dieser an einen ersten AD-Meßwertwand I er 12 (Umsetzer, Transmitter) geschaltet ist. Der Eingang 2 der zweiten physikalischen Größe ist angeschlossen an einen zweiten Anpassungsschaltkreis 21, wobei dieser an einen zweiten AD-Meßwertwand Ier 22 geschaltet ist. Allgemein können N (N = 3 , 4 , 5 ... natürliche Zahl) Eingänge vorgesehen sein, wobei der N-te Eingang an einen N1-Anpassungsscha 11kreis angeschlossen ist, der wiederum an einen N-ten AD-Meßwertwandler N2 angeschlossen ist. Die AD-Meßwertwandler 12, 22 bis N2 sind an einen gemeinsamen Speicher 100 angeschlossen, der seinerseits an ein Display (Bildschirm) 200 angeschlossen ist. Im Falle, daß ein Durchgangswiderstand mit dem vorgeschlagenen Schaltkreis gemessen wird, der an eine Wechselspannung angeschlossen ist, dann sind zwischen dem Eingang 1 und dem Eingang 2 in Serie ein Durchgangswiderstand 20 sowie ein Vergleichswiderstand 10 geschaltet, die ihrerseits an die Sekundärwicklung des Transformators 30 geschaltet sind.The input 1 for the first measured physical quantity is connected to a first adaptation circuit 11, which is connected to a first AD measuring value converter 12 (converter, transmitter). The input 2 of the second physical quantity is connected to a second adaptation circuit 21, which is connected to a second AD measuring value converter 22. In general, N (N = 3, 4, 5 ... natural number) inputs can be provided, with the Nth input being connected to an N1 adaptation circuit, which in turn is connected to an Nth AD measuring value converter N2. The AD measuring value converters 12, 22 to N2 are connected to a common memory 100, which in turn is connected to a display (screen) 200. In the case that a passage resistance is measured with the proposed circuit which is connected to an alternating voltage, a passage resistance 20 and a comparison resistance 10 are connected in series between input 1 and input 2, which in turn are connected to the secondary winding of the transformer 30.
Die vorgeschlagene Schaltung mit direkter Ablesung gemessener Werte am Ausgang kann mit Erfolg in der Elektrotechnik, in der Chemie und in anderen Fachbereichen eingesetzt werden.The proposed circuit with direct reading of measured values at the output can be successfully used in electrical engineering, chemistry and other fields.
Claims (2)
dadurch gekennzeichnet,1. Circuit arrangement of a measuring device for measuring physical quantities with direct reading of measured values from the display,
characterized,
dadurch gekennzeichnet,2. Device for measuring contact resistances according to claim 1,
characterized,
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS923684A CZ279194B6 (en) | 1992-12-16 | 1992-12-16 | Circuit arrangement of measuring instrument for measuring contact resistance |
Publications (1)
Publication Number | Publication Date |
---|---|
DE9319051U1 true DE9319051U1 (en) | 1994-04-14 |
Family
ID=5377630
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19934342346 Withdrawn DE4342346A1 (en) | 1992-12-16 | 1993-12-11 | Physical parameter measuring device with direct read=out - has each input coupled via matching circuit and A=D converter to common memory for read=out display |
DE9319051U Expired - Lifetime DE9319051U1 (en) | 1992-12-16 | 1993-12-11 | Circuit arrangement of a measuring device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19934342346 Withdrawn DE4342346A1 (en) | 1992-12-16 | 1993-12-11 | Physical parameter measuring device with direct read=out - has each input coupled via matching circuit and A=D converter to common memory for read=out display |
Country Status (3)
Country | Link |
---|---|
CZ (1) | CZ279194B6 (en) |
DE (2) | DE4342346A1 (en) |
FR (1) | FR2699284A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3126485A1 (en) * | 1981-07-04 | 1983-01-20 | Metrawatt GmbH, 8500 Nürnberg | Measuring arrangement |
DE3242967A1 (en) * | 1982-11-20 | 1984-05-24 | Hans-Jörg Dipl.-Kfm. 4400 Münster Hübner | Method and measuring instrument for measuring and processing characteristic quantities of the environmental atmosphere, particularly below ground |
DE3309802C2 (en) * | 1983-03-18 | 1985-07-04 | Audi AG, 8070 Ingolstadt | Electronic system for motor vehicles |
DE3818534A1 (en) * | 1988-05-31 | 1989-12-07 | Brunner Wolfgang | METHOD FOR PRESENTING THE LOCALLY DISTRIBUTED DISTRIBUTION OF PHYSICAL SIZES ON A DISPLAY, AND DEVICE FOR CARRYING OUT THE METHOD |
SU1647263A1 (en) * | 1989-02-23 | 1991-05-07 | Специальное конструкторское бюро "Виброприбор" | Indicator device |
IL92510A (en) * | 1989-11-30 | 1995-11-27 | Elscint Ltd | Surface coil array receiver |
DE4114971A1 (en) * | 1991-05-03 | 1992-11-05 | Siemens Ag | CIRCUIT ARRANGEMENT FOR CONVERTING SEVERAL, ANALOG ELECTRICAL MEASURING SIGNALS AT INPUT CONNECTIONS TO CORRESPONDING DIGITAL SIGNALS |
-
1992
- 1992-12-16 CZ CS923684A patent/CZ279194B6/en unknown
-
1993
- 1993-12-11 DE DE19934342346 patent/DE4342346A1/en not_active Withdrawn
- 1993-12-11 DE DE9319051U patent/DE9319051U1/en not_active Expired - Lifetime
- 1993-12-13 FR FR9314932A patent/FR2699284A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2699284A1 (en) | 1994-06-17 |
DE4342346A1 (en) | 1994-06-23 |
CZ368492A3 (en) | 1994-07-13 |
CZ279194B6 (en) | 1995-01-18 |
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