GB2021810A - X-ray tube filament current predictive control circuit - Google Patents

X-ray tube filament current predictive control circuit

Info

Publication number
GB2021810A
GB2021810A GB7912913A GB7912913A GB2021810A GB 2021810 A GB2021810 A GB 2021810A GB 7912913 A GB7912913 A GB 7912913A GB 7912913 A GB7912913 A GB 7912913A GB 2021810 A GB2021810 A GB 2021810A
Authority
GB
United Kingdom
Prior art keywords
filament current
control circuit
ray tube
predictive control
tube
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.)
Granted
Application number
GB7912913A
Other versions
GB2021810B (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2021810A publication Critical patent/GB2021810A/en
Application granted granted Critical
Publication of GB2021810B publication Critical patent/GB2021810B/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
    • H05G1/30—Controlling
    • H05G1/34—Anode current, heater current or heater voltage of X-ray tube

Landscapes

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

Abstract

A predictive control circuit (16) is provided to predict the filament current necessary to be produced by a filament current controller (14) to provide a desired anode current in an X-ray tube (10 or 11) when a known anode voltage is applied by a high voltage power supply (12), during the interval, immediately following the application of the anode voltage, in which feedback control is inadequate. The control circuit comprises means arranged to compute a filament current control signal if in accordance with the relationship <IMAGE> where u represents the pre-emission filament current of the tube; KI<w>a is a baseline term, and <IMAGE> is a term representative of the effects of spacecharge in the tube.
GB7912913A 1978-04-19 1979-04-12 X-ray tube filament current predictive control circuit Expired GB2021810B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US89773178A 1978-04-19 1978-04-19

Publications (2)

Publication Number Publication Date
GB2021810A true GB2021810A (en) 1979-12-05
GB2021810B GB2021810B (en) 1982-08-04

Family

ID=25408330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7912913A Expired GB2021810B (en) 1978-04-19 1979-04-12 X-ray tube filament current predictive control circuit

Country Status (7)

Country Link
JP (1) JPS54158893A (en)
BE (1) BE875641A (en)
CA (1) CA1122330A (en)
DE (1) DE2915548A1 (en)
FR (1) FR2423950A1 (en)
GB (1) GB2021810B (en)
IT (1) IT1120109B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747118A (en) * 1985-04-29 1988-05-24 U.S. Philips Corporation X-ray examination system and method of controlling an exposure therein
EP4053877A4 (en) * 2019-10-30 2023-12-06 Nuray Technology Co., Ltd. Time division multiplexing control device and system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001118A1 (en) * 1980-01-14 1981-07-16 Siemens AG, 1000 Berlin und 8000 München X-RAY DIAGNOSTIC GENERATOR FOR AN X-RAY TUBE WITH SEVERAL FIRE SPOTS

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521067A (en) * 1968-04-15 1970-07-21 Picker Corp X-ray tube current stabilization
NL7314036A (en) * 1973-10-12 1975-04-15 Philips Nv GLOW CURRENT SUPPLY FOR A HIGH VOLTAGE ELECTRON TUBE.
DE2422844C3 (en) * 1974-05-10 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen X-ray diagnostic apparatus in which the X-ray tube voltage is regulated via the X-ray tube heating current
DE2539898C2 (en) * 1975-09-08 1982-06-03 Siemens AG, 1000 Berlin und 8000 München X-ray diagnostic apparatus with an adjusting means for the control circuit containing the X-ray tube heating current for a recording parameter dependent on the X-ray tube current
DE2542016A1 (en) * 1975-09-20 1977-03-24 Philips Patentverwaltung Control circuit for X-ray tube exposure current - has resistor switched between two HV generators with voltage drop proportional to actual value of exposure current
US4072865A (en) * 1976-06-24 1978-02-07 American Radiologic Systems, Inc. Automatic control system
DE2754920A1 (en) * 1977-12-09 1979-06-13 Koch & Sterzel Kg PROCEDURE AND CIRCUIT ARRANGEMENT FOR THE HEATING POWER SUPPLY OF A ROENTINE PIPE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747118A (en) * 1985-04-29 1988-05-24 U.S. Philips Corporation X-ray examination system and method of controlling an exposure therein
EP4053877A4 (en) * 2019-10-30 2023-12-06 Nuray Technology Co., Ltd. Time division multiplexing control device and system

Also Published As

Publication number Publication date
IT7921884A0 (en) 1979-04-13
CA1122330A (en) 1982-04-20
IT1120109B (en) 1986-03-19
JPS54158893A (en) 1979-12-15
DE2915548A1 (en) 1979-10-25
FR2423950A1 (en) 1979-11-16
JPS638598B2 (en) 1988-02-23
GB2021810B (en) 1982-08-04
BE875641A (en) 1979-10-17
FR2423950B1 (en) 1983-12-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930412