EP0421009B1 - X-ray diagnostic generator with a rotating anode x-ray tube - Google Patents

X-ray diagnostic generator with a rotating anode x-ray tube Download PDF

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Publication number
EP0421009B1
EP0421009B1 EP89118401A EP89118401A EP0421009B1 EP 0421009 B1 EP0421009 B1 EP 0421009B1 EP 89118401 A EP89118401 A EP 89118401A EP 89118401 A EP89118401 A EP 89118401A EP 0421009 B1 EP0421009 B1 EP 0421009B1
Authority
EP
European Patent Office
Prior art keywords
anode
ray
rotating anode
ray tube
motor
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
Application number
EP89118401A
Other languages
German (de)
French (fr)
Other versions
EP0421009A1 (en
Inventor
Horst Dr.Rer.Nat. Aichinger
Albert Dipl.-Ing. Moosmann (Fh)
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 AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP89118401A priority Critical patent/EP0421009B1/en
Priority to DE8989118401T priority patent/DE58903473D1/en
Priority to US07/578,663 priority patent/US5060251A/en
Priority to JP2266145A priority patent/JP2856878B2/en
Publication of EP0421009A1 publication Critical patent/EP0421009A1/en
Application granted granted Critical
Publication of EP0421009B1 publication Critical patent/EP0421009B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05G1/66—Circuit arrangements for X-ray tubes with target movable relatively to the anode

Definitions

  • the invention relates to an X-ray diagnostic generator with a rotating anode X-ray tube and a feed circuit for the rotating anode motor.
  • the anode speed is determined individually, it is possible that it takes on values at which resonance vibrations occur in the bearings. This can damage the bearings.
  • the invention has for its object to provide an X-ray diagnostic generator of the type mentioned in such a way that the occurrence of resonance vibrations in the anode bearing is prevented when the anode speed is individually determined.
  • a vibration detector is present which slightly changes a set speed value if resonances occur in the motor mounting.
  • the vibration detector detects the occurrence of resonance vibrations and immediately gives this information to the drive unit for the rotating anode motor. This now corrects the drive frequency minimally up or down so that the resonance vibrations disappear again.
  • a rotating anode X-ray tube 1 is shown with a rotating anode motor 2, which is supplied with anode and heating voltage by a supply circuit 3.
  • the rotating anode motor 2 is supplied by a supply circuit 4 with a suitable supply voltage, which is determined in such a way that the optimum motor speed and thus anode speed result for the respective recording parameters.
  • the feed circuits 3, 4 each contain a mains rectifier and a downstream inverter.
  • the rotary anode motor 2 is assigned a vibration detector 5, which detects the occurrence of resonance vibrations in the anode bearing and causes a processor 6 that in this case the feed frequency and thus the anode speed is changed slightly up or down, so that the resonance vibrations disappear and so that no bearing damage occurs.
  • the processor 6 receives at its input 7 a signal which corresponds to the target value for the anode speed determined by a recording data computer. This setpoint is changed slightly in the sense described above when resonance vibrations occur.

Landscapes

  • X-Ray Techniques (AREA)

Description

Röntgendiagnostikgenerator mit einer Drehanoden-RöntgenröhreX-ray diagnostic generator with a rotating anode X-ray tube

Die Erfindung betrifft einen Röntgendiagnostikgenerator mit einer Drehanoden-Röntgenröhre und einer Speiseschaltung für den Drehanodenmotor.The invention relates to an X-ray diagnostic generator with a rotating anode X-ray tube and a feed circuit for the rotating anode motor.

Es ist bekannt, bei Hochfrequenz-Röntgengeneratoren nicht nur die Frequenz der Speisespannung für die Röntgenröhre in den Hochfrequenzbereich zu legen, also über einen Wechselrichter und einen vorgeschalteten Gleichrichter aus dem Netz zu gewinnen, sondern auch den Drehanodenmotor über einen Gleichrichter und einen nachgeschalteten Wechselrichter zu speisen. Auf diese Weise ist es möglich, die Speisefrequenz für den Drehanodenmotor und damit die Anodendrehzahl individuell festzulegen, d.h. jeweils optimal den Aufnahmeparametern anzupassen.It is known in the case of high-frequency X-ray generators not only to set the frequency of the supply voltage for the X-ray tube in the high-frequency range, i.e. to obtain it from the network via an inverter and an upstream rectifier, but also to feed the rotary anode motor via a rectifier and a downstream inverter . In this way it is possible to individually set the feed frequency for the rotating anode motor and thus the anode speed, i.e. to optimally adapt to the recording parameters.

Wird die Anodendrehzahl individuell festgelegt, so ist es möglich, daß sie Werte annimmt, bei denen in den Lagern Resonanzschwingungen auftreten. Die Lager können dadurch beschädigt werden.If the anode speed is determined individually, it is possible that it takes on values at which resonance vibrations occur in the bearings. This can damage the bearings.

Der Erfindung liegt die Aufgabe zugrunde, einen Röntgendiagnostikgenerator der eingangs genannten Art so auszubilden, daß bei individueller Festlegung der Anodendrehzahl das Auftreten von Resonanzschwingungen in der Anodenlagerung verhindert ist.The invention has for its object to provide an X-ray diagnostic generator of the type mentioned in such a way that the occurrence of resonance vibrations in the anode bearing is prevented when the anode speed is individually determined.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß bei individueller Festlegung der Anodendrehzahl in Abhängigkeit von den Aufnahmeparametern ein Vibrationsdetektor vorhanden ist, der einen eingestellten Drehzahlwert geringfügig verändert, wenn in der Motorlagerung Resonanzen auftreten. Der Vibrationsdetektor detektiert das Auftreten von Resonanzschwingungen und gibt diese Information sofort an die Antriebseinheit für den Drehanodenmotor. Diese korrigiert nun die Antriebsfrequenz minimal nach oben oder unten, so daß die Resonanzschwingungen wieder verschwinden.This object is achieved in that when the anode speed is determined individually as a function of the recording parameters, a vibration detector is present which slightly changes a set speed value if resonances occur in the motor mounting. The vibration detector detects the occurrence of resonance vibrations and immediately gives this information to the drive unit for the rotating anode motor. This now corrects the drive frequency minimally up or down so that the resonance vibrations disappear again.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to an embodiment shown in the drawing.

In der Zeichnung ist eine Drehanoden-Röntgenröhre 1 mit einem Drehanodenmotor 2 dargestellt, die von einer Speiseschaltung 3 mit Anoden- und Heizspannung versorgt wird. Der Drehanodenmotor 2 wird von einer Speiseschaltung 4 mit einer geeigneten Speisespannung versorgt, die so festgelegt wird, daß sich zu den jeweiligen Aufnahmeparametern die optimale Motor- und damit Anodendrehzahl ergibt. Die Speiseschaltungen 3, 4 enthalten jeweils einen Netzgleichrichter und einen nachgeschalteten Wechselrichter.In the drawing, a rotating anode X-ray tube 1 is shown with a rotating anode motor 2, which is supplied with anode and heating voltage by a supply circuit 3. The rotating anode motor 2 is supplied by a supply circuit 4 with a suitable supply voltage, which is determined in such a way that the optimum motor speed and thus anode speed result for the respective recording parameters. The feed circuits 3, 4 each contain a mains rectifier and a downstream inverter.

Dem Drehanodenmotor 2 ist ein Vibrationsdetektor 5 zugeordnet, der das Auftreten von Resonanzschwingungen in der Anodenlagerung detektiert und über einen Prozessor 6 bewirkt, daß in diesem Fall die Speisefrequenz und damit die Anodendrehzahl geringfügig nach oben oder unten verändert wird, so daß die Resonanzschwingungen wieder verschwinden und damit keine Lagerschädigung eintritt. Der Prozessor 6 erhält an seinem Eingang 7 ein Signal, das dem von einem Aufnahmedatenrechner ermittelten Sollwert für die Anodendrehzahl entspricht. Dieser Sollwert wird im oben beschriebenen Sinne beim Auftreten von Resonanzschwingungen geringfügig verändert.The rotary anode motor 2 is assigned a vibration detector 5, which detects the occurrence of resonance vibrations in the anode bearing and causes a processor 6 that in this case the feed frequency and thus the anode speed is changed slightly up or down, so that the resonance vibrations disappear and so that no bearing damage occurs. The processor 6 receives at its input 7 a signal which corresponds to the target value for the anode speed determined by a recording data computer. This setpoint is changed slightly in the sense described above when resonance vibrations occur.

Claims (1)

  1. X-ray diagnostic generator, having a rotating anode X-ray tube (1) and a feed circuit arrangement (4) for the rotating anode motor (2) which individually fixes the feed frequency and with that the anode rotational speed as a function of the exposure parameters, and also having a vibration detector (5) which, when resonance vibrations occur in the motor bearing, causes the fixed feed frequency, and with that the anode rotational speed, to change slightly so that the resonance vibrations disappear again.
EP89118401A 1989-10-04 1989-10-04 X-ray diagnostic generator with a rotating anode x-ray tube Expired - Lifetime EP0421009B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP89118401A EP0421009B1 (en) 1989-10-04 1989-10-04 X-ray diagnostic generator with a rotating anode x-ray tube
DE8989118401T DE58903473D1 (en) 1989-10-04 1989-10-04 X-RAY DIAGNOSTIC GENERATOR WITH A ROTARY ANODE X-RAY TUBE.
US07/578,663 US5060251A (en) 1989-10-04 1990-09-07 X-ray diagnostics generator having a rotating anode x-ray tube
JP2266145A JP2856878B2 (en) 1989-10-04 1990-10-03 X-ray diagnostic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89118401A EP0421009B1 (en) 1989-10-04 1989-10-04 X-ray diagnostic generator with a rotating anode x-ray tube

Publications (2)

Publication Number Publication Date
EP0421009A1 EP0421009A1 (en) 1991-04-10
EP0421009B1 true EP0421009B1 (en) 1993-02-03

Family

ID=8201979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118401A Expired - Lifetime EP0421009B1 (en) 1989-10-04 1989-10-04 X-ray diagnostic generator with a rotating anode x-ray tube

Country Status (4)

Country Link
US (1) US5060251A (en)
EP (1) EP0421009B1 (en)
JP (1) JP2856878B2 (en)
DE (1) DE58903473D1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018369A1 (en) * 2005-03-30 2006-10-05 Hofmann Mess- Und Auswuchttechnik Gmbh & Co. Kg Rotating anode X-ray tube
JP2007179817A (en) * 2005-12-27 2007-07-12 Shimadzu Corp X-ray radiographic photographing device
DE102011006125B4 (en) * 2011-03-25 2014-11-13 Siemens Aktiengesellschaft Noise monitoring system and method for monitoring and controlling bearing noise of a plain bearing of an X-ray source
JP7112234B2 (en) * 2018-04-12 2022-08-03 浜松ホトニクス株式会社 X-ray generator and X-ray utilization system
EP3618582A1 (en) 2018-08-30 2020-03-04 Koninklijke Philips N.V. Ct x-ray tube with an anode plate where angular velocity varies with time

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239783B (en) * 1962-08-14 1967-05-03 Picker X Ray Corp Device for controlling and monitoring the speed of rotation of rotating anode x-ray tubes
US3943356A (en) * 1974-12-05 1976-03-09 Advanced Instrument Development, Inc. X-ray tube rotating anode sensing detector
SU570227A1 (en) * 1975-07-25 1977-08-25 Zhutyaev Sergej G Device for protecting x-ray tubes with rotating anode from overloading
US4316129A (en) * 1977-11-02 1982-02-16 The Machlett Laboratories, Incorporated X-Ray tube control system
JPS5738547A (en) * 1980-08-19 1982-03-03 Toshiba Corp Rotary anode x-ray tube
JPS5778756A (en) * 1980-11-04 1982-05-17 Hitachi Ltd Rotary anode x-ray tube device
JPS61153932A (en) * 1984-12-27 1986-07-12 Toshiba Corp Evaluation of rotary mechanism in x-ray tube and device therefor
JP3174651B2 (en) * 1992-11-20 2001-06-11 三菱重工業株式会社 Linen conveyor

Also Published As

Publication number Publication date
JP2856878B2 (en) 1999-02-10
US5060251A (en) 1991-10-22
EP0421009A1 (en) 1991-04-10
JPH03127498A (en) 1991-05-30
DE58903473D1 (en) 1993-03-18

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