DE921467C - Circuit arrangement for capacitors to achieve proportionality between capacitor charging time and applied voltage - Google Patents
Circuit arrangement for capacitors to achieve proportionality between capacitor charging time and applied voltageInfo
- Publication number
- DE921467C DE921467C DET2163D DET0002163D DE921467C DE 921467 C DE921467 C DE 921467C DE T2163 D DET2163 D DE T2163D DE T0002163 D DET0002163 D DE T0002163D DE 921467 C DE921467 C DE 921467C
- Authority
- DE
- Germany
- Prior art keywords
- capacitor
- capacitors
- circuit arrangement
- applied voltage
- charging time
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
Für Meßzwecke, z. B. zur Integration elektrischer Größen über die Zeit, ist es erwünscht, daß die zur Aufladung eines Kondensators auf eine bestimmte Spannung notwendige Zeit proportional der angelegten Spannung ist. Es ist bekannt, zu diesem Zweck die Ladung über eine im Sättigungsgehiet arbeitende Glühkathodenröhre vorzunehmen. Die Verwendung einer solchen Röhre hat, besonders auch wegen der notwendigen Heizstromquelle, den Nachteil eines sehr großen Aufwandes. For measuring purposes, e.g. B. to integrate electrical quantities via the Time, it is desirable to have to charge a capacitor to a certain time Voltage necessary time is proportional to the applied voltage. It is known, for this purpose the charge is carried out via a hot cathode tube operating in saturation to undertake. The use of such a tube has, especially because of the necessary Heating power source, the disadvantage of a very large effort.
Die Erfindung bezweckt eine Vereinfachung der bekannten Anordnungen und erreicht dies dadurch, daß zur Erzielung einer Proportionalität zwischen Kondensatorladezeit und angelegter Spannung der Kondensator, an dessen Belegungen ein eine Glimmlampe enthaltender Entladekreis angeschlossen ist, in Reihe mit einem Vorwiderstand an die Klemmen eines vorgeschalteten Kondensators angeschlossen ist, der ebenfalls in Reihe mit einem Vorwiderstand an der Spannungsquelle liegt. Durch geeignete Bemessung dieser Kaskaden schaltung nach der Erfindung kann erreicht werden, daß in jedem gewünschten Bereich die Zeit der Aufladung des Kondensators bis zu der vorbestimmten, vorher festgelegten Zündspannung der Glimmlampe praktisch genau proportional der an die Eingangsklemmen der Schaltung gelegten Spannung ist. The invention aims to simplify the known arrangements and achieves this in that to achieve a proportionality between the capacitor charging time and applied voltage of the capacitor, on whose assignments a glow lamp containing discharge circuit is connected in series with a series resistor the terminals of an upstream capacitor is connected, which is also is in series with a series resistor at the voltage source. By appropriate dimensioning this cascade circuit according to the invention can be achieved that in each desired range the time of charging the capacitor up to the predetermined, predetermined ignition voltage of the glow lamp practically exactly proportional to the is the voltage applied to the input terminals of the circuit.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Diese zeigt eine Anordnung zur Fortschaltung eines Zählers in Abhängigkeit von der angelegten Spannung und der Zeit. Die Spannung wird an die Klemmen U angelegt. W1 ist der Ladewiderstand des ersten Kondensators Ci, und W2 ist der Ladewiderstand des zweiten Kondensators C2. An den Klemmen des Kondensators C2 liegt eine Glimmlampe G und ein Relais R. Erreicht der Kondensator C2 die Zündspannung der Glimmlampe G dann zündet diese; und Relais R spricht an. Relais R schließt mit seinem Kontaktrl einen Stromkreis für ein elektromagnetisches Zählwerk Z, welches durch den Entladestrom des Kondensators C2 erregt wird und die Zahlen trommel um einen Schritt fortschaltet. Das Zählwerk regelt einen verhältnismäßig kleinen Widerstand, so daß sich der Kondensator C2 in diesem Stromkreis vollkommen entlädt. Der Kontakt r2 des Relais R schließt gleichzeitig einen Stromkreis- für die Entladung des Kondensators Ci. An embodiment of the invention is shown in the drawing. This shows an arrangement for incrementing a counter as a function of the applied voltage and time. The voltage is applied to the U terminals. W1 is the charging resistor of the first capacitor Ci, and W2 is the charging resistor of the second capacitor C2. A glow lamp is connected to the terminals of capacitor C2 G and a relay R. If the capacitor C2 reaches the ignition voltage of the glow lamp G then ignites this; and relay R responds. Relay R closes with its contact rl a circuit for an electromagnetic counter Z, which by the discharge current of the capacitor C2 is excited and the numbers drum advances by one step. The counter regulates a relatively small resistance, so that the capacitor C2 is completely discharged in this circuit. Contact r2 of relay R closes at the same time a circuit for the discharge of the capacitor Ci.
Nach der Entladung des Kondensators C2 fällt das Relais R ah, und der Vorgang wiederholt sich. After the discharge of the capacitor C2, the relay R ah, and drops the process repeats itself.
Zweckmäßig werden die beiden Vorwiderstände Wi und W2 gleich groß gemacht und ebenso die Kondensatoren Cl und C2. Bei einer Anordnung mit der Bemessung Wi= W2= 2,5 Megohm, Ci =C2 =8,7Mf konnte folgende Abhängigkeit der Ladezeit ti des Kondensators C2 von der an die Klemmen U an gelegten Spannung E gemessen werden: E Ti gemessen ti gerechnet 225 Volt 58,5 Sekunden 5S,5 Sekunden 310 - 43,0 - 42,5 -350 - 37,0 - 37,6 -400 - 32,0 - 32,9 -500 - 26,5 - 26,3 -Die Meßwerte, welche durch kleine Meßungenauigkeiten beim Abstoppen beeinträchtigt sind, zeigen praktisch genügende Übereinstimmung mit den technischen Werten. The two series resistors Wi and W2 are expediently the same size made and also the capacitors Cl and C2. In an arrangement with the dimensioning Wi = W2 = 2.5 megohms, Ci = C2 = 8.7Mf, the following dependency of the charging time ti des Capacitor C2 can be measured by the voltage E applied to terminals U: E Ti measured ti calculated 225 volts 58.5 seconds 5S, 5 seconds 310 - 43.0 - 42.5 -350 - 37.0 - 37.6 -400 - 32.0 - 32.9 -500 - 26.5 - 26.3 -The measured values, which by small measurement inaccuracies are impaired when stopping, show practically sufficient Compliance with the technical values.
In dem dargestellten Ausführungsbeispiel wird somit der Zähler Z sowohl proportional der angelegten Spannung als auch der Zeit fortgeschaltet. In the illustrated embodiment, the counter Z incremented proportionally to both the applied voltage and the time.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET2163D DE921467C (en) | 1943-02-16 | 1943-02-16 | Circuit arrangement for capacitors to achieve proportionality between capacitor charging time and applied voltage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET2163D DE921467C (en) | 1943-02-16 | 1943-02-16 | Circuit arrangement for capacitors to achieve proportionality between capacitor charging time and applied voltage |
Publications (1)
Publication Number | Publication Date |
---|---|
DE921467C true DE921467C (en) | 1954-12-20 |
Family
ID=7543694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET2163D Expired DE921467C (en) | 1943-02-16 | 1943-02-16 | Circuit arrangement for capacitors to achieve proportionality between capacitor charging time and applied voltage |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE921467C (en) |
-
1943
- 1943-02-16 DE DET2163D patent/DE921467C/en not_active Expired
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