EP0118160B1 - Verfahren zum Feststellen von Betriebsstörungen und Röntgengenerator zur Durchführung des Verfahrens - Google Patents

Verfahren zum Feststellen von Betriebsstörungen und Röntgengenerator zur Durchführung des Verfahrens Download PDF

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Publication number
EP0118160B1
EP0118160B1 EP84200314A EP84200314A EP0118160B1 EP 0118160 B1 EP0118160 B1 EP 0118160B1 EP 84200314 A EP84200314 A EP 84200314A EP 84200314 A EP84200314 A EP 84200314A EP 0118160 B1 EP0118160 B1 EP 0118160B1
Authority
EP
European Patent Office
Prior art keywords
state
ray generator
event
failure
actual
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
EP84200314A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0118160A3 (en
EP0118160A2 (de
Inventor
Herbert Müller
Rudolf Ochmann
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics 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 Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0118160A2 publication Critical patent/EP0118160A2/de
Publication of EP0118160A3 publication Critical patent/EP0118160A3/de
Application granted granted Critical
Publication of EP0118160B1 publication Critical patent/EP0118160B1/de
Expired 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
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/54—Protecting or lifetime prediction
    • 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

Definitions

  • the invention relates to a method for ascertaining operating faults in an X-ray generator, in which the desired state of operating data is compared with its measured actual state and, in the event of impermissible deviations, a value characterizing the type of fault is fed to a part of a display device displaying the setting data of the X-ray generator in normal operation, and an X-ray generator tailored to this process.
  • the setting data are displayed in normal operation in the display device, i.e. those data that are essential for imaging - e.g. B. kV, mA, sec - and which are set by the user himself or automatically specified.
  • the operating data which are monitored to detect a fault in the X-ray generator, are partially identical to the setting data - for example, it must be monitored that the specified tube voltage is actually set. In part, however, it is also data of a different type, which are essential for the function of the X-ray generator, but which are not of direct interest for the imaging and for the user, e.g. B. the heating current of the X-ray tube.
  • the operating data can be analog values, but also digital states.
  • analog operating data - for example the tube voltage - the target state is generally given by the target value of a control circuit provided for this purpose, while the fixed state is the actual value measured by a measuring device in this control circuit. In this case, there is a fault if the actual value in the steady state lies outside a range around the setpoint, e.g. by multiplying and dividing the setpoint by a constant factor.
  • auxiliary device selector in which it must be checked whether the choice made by the user on a control panel of one of several auxiliary devices to be connected to the X-ray generator (target state) actually corresponds to the connection or disconnection of the auxiliary devices (actual state) carried out by the system .
  • the object of the present invention is to design the method of the type mentioned at the outset in such a way that troubleshooting can be facilitated by further information provided by the x-ray generator.
  • This object is achieved in that the target state and the disturbed actual state are additionally displayed in the event of a fault.
  • An X-ray generator set up for this method is for carrying out the method with a memory device in which the desired state of operating data of the X-ray generator is stored, a measuring device for detecting the actual state, a control device which processes the measured actual state and the stored nominal state and which, in the event of a malfunction, the value characterizing the type of malfunction supplies part of the display device, is provided and is characterized in that the actual state and the target state are supplied to a switch arrangement which is coupled to the display device and is switched over by the control device.
  • An X-ray tube 1 is fed by a unit 2, which contains the elements required for power generation and its control, i.a. also several control loops, only a part of a single one of these control loops being indicated in the drawing, e.g. B. the control circuit for the heating current.
  • a control circuit known per se contains a measuring device 21 which measures the variable to be controlled (heating current) and supplies a value corresponding to this variable, the actual value, to a comparison device 22, the deviation controlling a controller 23, which in turn influences the controlled variable (heating current).
  • the setpoint is supplied by a digital-to-analog converter 24, the input of which is connected to an output of a control device 30, to which a digital data word Soll corresponding to the setpoint is present.
  • the data word target is stored in a memory (not shown in detail) which is assigned to the converter 24.
  • the control device 30 is coupled to a memory 31, in which the target values or target states or data words are stored, from which, in conjunction with other data words, the control device 30 forms the target values or target states in a defined manner.
  • An input of this control device 30 is supplied with a digital data word Ist, which is generated from the actual value supplied by the measuring device 21 by an analog-digital converter 25, which is coupled to the measuring device via a switch 26 controlled by the control device 30.
  • the actual values of other control loops can also be fed to the analog-digital converter 25 via this switch.
  • the setting data e.g. Recording or fluoroscopic voltage, tube current, recording time, fed via multiplexers 32, 33 and 34 to the display units 41 and 42, 43 and 44 of a display and operating device 4, where they are decoded, stored and displayed.
  • the control device 30 If the measured actual value in the stationary case lies outside a predetermined range around the target value, this is recognized by the control device 30 as a fault, which then detects the fact and at its output 35, which is connected to the display units 41 and 42 via the multiplexer 32 outputs the type of fault characterizing data words and at the same time switches the multiplexers 32, 33 and 34 so that now a fault message (in display field 41) indicates the type of fault, e.g. B. heating circuit failure, characteristic value (in display field 42), the setpoint (in display field 44) and the actual value (in display field 43) appear. At the same time, all other settings are blocked for security reasons.
  • a fault message in display field 41
  • characteristic value in display field 42
  • the setpoint in display field 44
  • the actual value in display field 43
  • the display of the actual value and setpoint enables the cause of the fault to be narrowed down.
  • the diagnosis "heating filament burned out” which would be possible in the case of the displayed fault type "heating circuit defective” is excluded if the displayed actual value differs from zero.
  • the type of fault the setpoint and the actual value are automatically displayed because the user - usually a doctor - is not directly interested in this data ... 44 are adopted.
  • This memory has a storage capacity which is sufficient to accommodate the data words assigned to a larger number of further faults (in the order of their occurrence). These sets of data words assigned to the previous faults can be called up by repeatedly pressing a key 46 coupled to the control device 30, the data words read from the error memory 36 being fed to the display units 42 ... 44 via the multiplexers 32 ... 34.
  • the components 30 ... 36 can be parts of a microcomputer 3, the control unit 30 among other things. is formed by an arithmetic logic unit and an associated program memory of the microcomputer, which has further memories 31 and 36, and wherein the multiplexers 32 ... 34 are realized by a branch in the program.
  • the part of such a program required to carry out the method according to the invention is explained in more detail with the aid of the associated flow chart shown in FIGS. 2 and 3.
  • the nth setpoint or setpoint state is first calculated or fetched from the memory and a range around this setpoint is defined, which is defined by an upper limit value Max and a lower limit value Min (this last step is omitted in FIG Rule when digital states are to be monitored).
  • the setpoint is then output (block 302), e.g. B. to the digital-to-analog converter 24 (FIG. 1). This step is also omitted when monitoring digital states.
  • a defined waiting time block 303 so that, for example, the controlled control loop can reach its steady state.
  • the actual value ACTIVATED by the analog-digital converter 25 is read in, the control unit 30 bringing the changeover switch 26 into the suitable position.
  • the program is branched depending on whether the target state defined in the memory 31 and the measured actual state are identical or not.
  • the subroutine 310 to which the program branches in the event of a malfunction, first provides (block 311) that the data words output by the control unit 30 assume such a value that damage to the x-ray generator by the malfunction is excluded. At the same time, the operational readiness is blocked, so that operation is not possible. Finally, the fault display (display field 41) is switched on. In the subsequent block 312, a value which characterizes the type of fault is fed to the display unit 42 (FIG. 1). The type of disturbance is characterized by the type of the desired state, the query to which resulted in the branching to subroutine 310.
  • This desired state is in turn clearly identified by the index n, so that there is a clear association between the index n and the value characterizing the fault and the latter can easily be derived from n.
  • the actual state is transported to the display unit 43 and the data word Soll which characterizes the desired state is conveyed to the display unit 44 (block 314).
  • the target state is also characterized by the values Max and Min, these can also be displayed in two display units or in a multi-digit display unit instead of the target value.
  • the data words for the type of fault for the actual value and the target value are then written into the error memory 36 (block 315) and, if appropriate, also additionally the setting data in which the fault occurred.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
EP84200314A 1983-03-08 1984-03-06 Verfahren zum Feststellen von Betriebsstörungen und Röntgengenerator zur Durchführung des Verfahrens Expired EP0118160B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3308125 1983-03-08
DE19833308125 DE3308125A1 (de) 1983-03-08 1983-03-08 Verfahren zum feststellen von betriebsstoerungen und roengtengenerator zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0118160A2 EP0118160A2 (de) 1984-09-12
EP0118160A3 EP0118160A3 (en) 1985-12-04
EP0118160B1 true EP0118160B1 (de) 1989-06-14

Family

ID=6192813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200314A Expired EP0118160B1 (de) 1983-03-08 1984-03-06 Verfahren zum Feststellen von Betriebsstörungen und Röntgengenerator zur Durchführung des Verfahrens

Country Status (3)

Country Link
EP (1) EP0118160B1 (ja)
JP (1) JPS59177897A (ja)
DE (2) DE3308125A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320230A1 (de) * 1983-06-03 1984-12-06 Siemens AG, 1000 Berlin und 8000 München Roentgendiagnostikanlage
JPS6337599A (ja) * 1986-07-30 1988-02-18 Hitachi Medical Corp Ｘ線条件表示装置
JPS647800U (ja) * 1987-07-01 1989-01-17
US5325893A (en) * 1991-10-04 1994-07-05 Tokushu Paper Mfg. Co., Ltd. Air duct and paper therefor

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842280A (en) * 1970-12-23 1974-10-15 Picker Corp Protective circuit for limiting the input power applied to an x-ray tube and method of operation
DE2220444B2 (de) * 1972-04-26 1976-04-15 Koch & Sterzel Kg, 4300 Essen Roentgenapparat mit einer vorrichtung zur wahl der fuer eine roentgenuntersuchung benoetigten groessen
DE2510984A1 (de) * 1975-03-13 1976-09-30 Hofmann Gmbh Elektr Fritz Roentgendiagnostikapparat mit roentgenroehrenschutzschaltung
US4035648A (en) * 1976-09-02 1977-07-12 Cgr Medical Corporation X-ray tube protection circuit
GB2007950B (en) * 1977-06-17 1982-02-17 France R R X-ray system signal derivation circuits for heat unit indicators and/or calibrating
CA1151314A (en) * 1978-09-15 1983-08-02 Robert R. Lafrance X-ray system signal derivation circuits for heat unit indicators and/or calibration meters
DE2853632A1 (de) * 1978-12-12 1980-07-03 Siemens Ag Roentgendiagnostikanlage mit anzeigemitteln fuer die betriebsdaten
JPS567397A (en) * 1979-07-02 1981-01-26 Hitachi Medical Corp Display device for integrated value of tube electric current
JPS5682600A (en) * 1979-12-11 1981-07-06 Toshiba Corp X-ray controller
JPS5688300A (en) * 1979-12-20 1981-07-17 Toshiba Corp X-ray controlling device
JPS576080U (ja) * 1980-06-13 1982-01-12
JPS5787099A (en) * 1980-11-20 1982-05-31 Hitachi Medical Corp X-ray device
JPS57162299A (en) * 1981-03-30 1982-10-06 Shimadzu Corp X-ray controlling apparatus

Also Published As

Publication number Publication date
JPS59177897A (ja) 1984-10-08
DE3308125A1 (de) 1984-09-13
EP0118160A3 (en) 1985-12-04
EP0118160A2 (de) 1984-09-12
DE3478736D1 (en) 1989-07-20

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