DE639826C - Device to ensure the correctness of the pipe current measurement in Roentgen systems with Villard switch arrangement - Google Patents

Device to ensure the correctness of the pipe current measurement in Roentgen systems with Villard switch arrangement

Info

Publication number
DE639826C
DE639826C DENDAT639826D DE639826DD DE639826C DE 639826 C DE639826 C DE 639826C DE NDAT639826 D DENDAT639826 D DE NDAT639826D DE 639826D D DE639826D D DE 639826DD DE 639826 C DE639826 C DE 639826C
Authority
DE
Germany
Prior art keywords
villard
correctness
current measurement
systems
ensure
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
Application number
DENDAT639826D
Other languages
German (de)
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.)
Siemens Reiniger Werke AG
Original Assignee
Siemens Reiniger Werke AG
Publication date
Application granted granted Critical
Publication of DE639826C publication Critical patent/DE639826C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/265—Measurements of current, voltage or power

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Description

Einrichtung zur Sicherung der Richtigkeit yder Röhrenstrommessung bei Röntgenanlagen mit Villardscher Schaltanordnung Bei Einrichtungen zur Röntgenstrahlenerzeugung mit Kondensatoren und Ventilen in Villardscher Schaltungsanordnung, die entsprechend Abb. i aus einem Hochspannungstransformator i, den Kondensatoren 2, 3, der Ventilröhre q, und der Röntgenröhre 5 bestehen, soll der ,die Kondensatoren ladende Strom ausschließlich durch .die Ventilröhre, der sie entladende Strom ausschließlich durch die Röntgenröhre fließen. Ein im Stromkreis der Röntgenröhre liegendes Strommeßgerät 6 zeigt in diesem Fall den Gebrauchsstrom izchtig an. (Unter Gebrauchsstrom ist hierbei der Strom verstanden, der in der Röntgenröhre in dem dazu bestimmten Brennfleck Röntgenstrahlen erzeugt.) Wenn die Röntgenröhre jedoch in der Richtung Anode - Kathode Strom durchläßt, was nicht selten, auch ohne daß es bemerkt wird, vorkommt, erlauben die Angaben des Meßgerätes keine sicheren Rückschlüsse auf den Gebrauchsstrom. Das führt zu Fehlbelichtungen oder Überdosierungen.Device to ensure the correctness of the tube current measurement for X-ray systems with Villard's switching arrangement. For devices for generating X-rays with capacitors and valves in Villard's circuit arrangement, the corresponding Fig. I from a high voltage transformer i, the capacitors 2, 3, the valve tube q, and the X-ray tube 5 exist, the current charging the capacitors should be exclusive through .the valve tube, the current discharging it exclusively through the X-ray tube flow. An ammeter 6 located in the circuit of the X-ray tube shows in this Fall the utility current at once. (In this case, utility electricity is electricity understood, the X-rays in the X-ray tube in the designated focal spot However, if the X-ray tube allows current to pass in the direction of the anode - cathode, what not seldom happens, even without being noticed, is permitted by the information of the measuring device does not allow any reliable conclusions to be drawn about the current in use. That leads to Incorrect exposures or overdosing.

Die Richtigkeit der Strommessung läßt sich erfIndungsgemäßdadurch sichern, daß entsprechend Abb. 2 das zwischen Röntgenröhre und Ventilröhre liegende Meßinstrument in Reihe mit einem Ventil 7 liegt, welches den Strom in Richtung des Nutzstromes durchläßt, während ein zweites Ventil 8 parallel zu dieser Meßanordnung derart liegt, daß es für den die Röntgenröhre in verkehrter Richtung durchfließenden Strom durchlässig ist.According to the invention, the correctness of the current measurement can thereby be determined ensure that according to Fig. 2 the one between the X-ray tube and the valve tube Measuring instrument is in series with a valve 7, which the flow in the direction of the Useful flow lets through, while a second valve 8 is parallel to this measuring arrangement is such that it flows through the X-ray tube in the wrong direction for the person Electricity is permeable.

Als Ventile 7, 8 werden zweckmäßig Kupferoxydulgleichrichter verwendet. Diese können vorteilhaft in das Strommeßgerät eingebaut sein.Copper oxide rectifiers are expediently used as valves 7, 8. These can advantageously be built into the ammeter.

Claims (3)

PATENTANSPRÜCHE: i. Einrichtung zur Sicherung der Richtigkeit der Röntgenröhrenstrommessung bei Röntgenanlagen mit Villardscher Schaltungsanordnung, dadurch gekennzeichnet, daß das zwischen Röntgenröhre und Ventilröhre liegende Meßinstrument in Reihe mit einem Ventil liegt, welches in Richtung des Nutzstromes durchlässig ist und daß parallel zu dieser Meßanordnung ein zweites Ventil derart liegt, daß es für entgegen dem Nutzstrom gerichtete Ströme durchlässig ist. PATENT CLAIMS: i. Device for ensuring the correctness of the X-ray tube current measurement in X-ray systems with Villard's circuit arrangement, characterized in that the measuring instrument located between the X-ray tube and valve tube is in series with a valve which is permeable in the direction of the useful current and that a second valve is located parallel to this measuring arrangement in such a way that that it is permeable to currents directed against the useful current. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß als Ventile (7, 8) Kupferoxydulgleichrichter dienen. 2. Establishment according to claim i, characterized in that the valves (7, 8) are copper oxide rectifiers to serve. 3. Einrichtung nach Anspruch i oder 2, dadurch gekennzeichnet, daß die Ventile (7, 8) in das Strommeßgerät eingebaut sind.3. Device according to claim i or 2, characterized in that the valves (7, 8) are built into the ammeter.
DENDAT639826D Device to ensure the correctness of the pipe current measurement in Roentgen systems with Villard switch arrangement Expired DE639826C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE639826T

Publications (1)

Publication Number Publication Date
DE639826C true DE639826C (en) 1936-12-14

Family

ID=6579892

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT639826D Expired DE639826C (en) Device to ensure the correctness of the pipe current measurement in Roentgen systems with Villard switch arrangement

Country Status (1)

Country Link
DE (1) DE639826C (en)

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