JPH04149996A - X-ray tube filament heating circuit - Google Patents

X-ray tube filament heating circuit

Info

Publication number
JPH04149996A
JPH04149996A JP27588690A JP27588690A JPH04149996A JP H04149996 A JPH04149996 A JP H04149996A JP 27588690 A JP27588690 A JP 27588690A JP 27588690 A JP27588690 A JP 27588690A JP H04149996 A JPH04149996 A JP H04149996A
Authority
JP
Japan
Prior art keywords
ray tube
tube
value
ray
filament
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.)
Pending
Application number
JP27588690A
Other languages
Japanese (ja)
Inventor
Fumio Ishiyama
文雄 石山
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP27588690A priority Critical patent/JPH04149996A/en
Publication of JPH04149996A publication Critical patent/JPH04149996A/en
Pending legal-status Critical Current

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  • X-Ray Techniques (AREA)

Abstract

PURPOSE:To increase a temperature to a predetermined value in a short time by providing a period for heating filaments at a higher value than a preliminary heating current value when an X-ray tube or a focal point size is changed, when a power supply of the X-ray tube is applied on the like. CONSTITUTION:When an X-ray tube TB1 of a large focal point is selected first, an output of a current control circuit 1 flows through a primary winding of a filament transfer LF to the tube TB1 for preliminary heating. Next, the tube TB1 is changed to TB2, the transformer LF is connected to the tube TB2. A pluse is outputted from a change-over timing detection circuit 4 by changing bulbs, and a monostable-multivibration MM is triggered. A set value by a setter R1 for a compensating quantity for changing is added to a value set by the preliminary heat setter 6 to be inputted to a circuit 1. After changing the bulbs, it is driven at a preliminary heat value which is larger for a time set by the MM. The filament temperature is thus increased to be steady in a short time.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明はX線診断装置に関し、より詳しくはX線管フィ
ラメント加熱回路に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an X-ray diagnostic apparatus, and more particularly to an X-ray tube filament heating circuit.

(従来技術及び発明が解決すべき課題)X線装置の電源
を投入したとき、あるいは使用するX線管や焦点サイズ
を変更したときに、選択されたX線管のフィラメントは
所定の電流値で予備加熱される。ところがフィラメント
に電流が供給されてから温度か飽和するまでには10秒
位の時間がかかる。そのため電源投入直後あるいはX線
管や焦点サイズの変更直後にX線を曝射するとフィラメ
ントの温度が上昇しきらないために所定の管電流が得ら
れないという問題があった。
(Prior art and problem to be solved by the invention) When the power of the X-ray device is turned on, or when the X-ray tube or focal spot size is changed, the filament of the selected X-ray tube is set at a predetermined current value. Preheated. However, it takes about 10 seconds for the temperature to reach saturation after current is supplied to the filament. Therefore, if X-rays are irradiated immediately after the power is turned on or the X-ray tube or focus size is changed, the temperature of the filament does not rise enough to cause a problem in that a predetermined tube current cannot be obtained.

本発明は常に所定の管電流を得ることのできるX線管フ
ィラメント加熱回路を提供することを目的とするもので
ある。
An object of the present invention is to provide an X-ray tube filament heating circuit that can always obtain a predetermined tube current.

[発明の構成] (課題を解決するための手段) 本発明では、電源投入時あるいはX線管や焦点サイズを
変更したときに予備加熱の電流値よりも大きな電流値で
フィラメントを加熱する期間を設け、予備加熱時のフィ
ラメント温度が短時間で所定の温度に達するようにする
ものである。
[Structure of the Invention] (Means for Solving the Problems) In the present invention, when the power is turned on or when the X-ray tube or focus size is changed, the filament is heated with a current value larger than the preheating current value. This is to ensure that the filament temperature during preheating reaches a predetermined temperature in a short time.

さらに、電源投入直後やX線管及び焦点サイズ切替直後
でフィラメントの温度か不十分な期間はX線か出ないよ
うなインターロック機構を設けたことを特徴とするもの
である。
Furthermore, the present invention is characterized by the provision of an interlock mechanism that prevents X-rays from being emitted during a period when the temperature of the filament is insufficient, such as immediately after power is turned on or immediately after switching the X-ray tube and focus size.

(作 用) 前述のように、予備加熱時よりも大きな電流によって加
熱したり、あるいはインターロック機構により所定期間
X線を曝射しないようにしたので、X線曝射の際には常
に所定の管電流値を得ることかできる。
(Function) As mentioned above, since heating is performed using a larger current than during preheating, or X-rays are not irradiated for a predetermined period using an interlock mechanism, the predetermined time is always maintained during X-ray irradiation. It is possible to obtain the tube current value.

(実施例) 第1図は本発明の一実施例回路図である。これは電流制
御回路1と、焦点切替スイッチSW1と、3個のX線管
(以下管球ともいう) T B 1TB2.TB3と、
これら各X線管のいずれかを選択する選択スイッチSW
2と、焦点サイズ切替信号SS、各X線管選択信号ST
1.Sr1゜Sr3によって駆動されて前記X線管選択
スイッチSW2を駆動するリレーコイルL1乃至L4と
、切替タイミング検出回路4と、予備加熱設定器6と、
この予備加熱設定器の出力と補正量設定器R1とを加算
する加算器3と、切替タイミング検出回路4からの信号
を入力し、Q側出力により前記補正量設定器R1の経路
に設けられたスイッチSW3を駆動するモノステーブル
マルチバイブレータ(以下モノマルチという)MMとに
よって構成されている。図において2は交流電源、5は
電源投入検出回路、SBはスタンバイ信号(X線曝射可
能信号)である。また、LFは大焦点フィラメントトラ
ンス、SFは小焦点フィラメントトランスを示すもので
ある。
(Embodiment) FIG. 1 is a circuit diagram of an embodiment of the present invention. This includes a current control circuit 1, a focus changeover switch SW1, and three X-ray tubes (hereinafter also referred to as tubes) T B 1TB2. TB3 and
Selection switch SW to select one of these X-ray tubes
2, focal size switching signal SS, and each X-ray tube selection signal ST
1. Relay coils L1 to L4 driven by Sr1 and Sr3 to drive the X-ray tube selection switch SW2, a switching timing detection circuit 4, and a preheat setting device 6;
An adder 3 that adds the output of this preheat setting device and the correction amount setting device R1 and a signal from the switching timing detection circuit 4 are input, and the Q side output is provided in the path of the correction amount setting device R1. It is configured by a monostable multivibrator (hereinafter referred to as monomulti) MM that drives the switch SW3. In the figure, 2 is an AC power supply, 5 is a power-on detection circuit, and SB is a standby signal (X-ray exposure enable signal). Further, LF indicates a large focus filament transformer, and SF indicates a small focus filament transformer.

前記電流制御回路は、第2図に示すように、整流器11
.トランジスタQ、、hランジスタ駆動回路12,4個
のトランジスタ 乃至 を有するトランジスタ群13.
帰還経路に設けられた演算増幅器14,15.発信器1
6からの出力によって制御され、前記各トランジスタ 
乃至 を駆動するトランジスタ駆動回路17等によって
構成され、電流設定信号に従って出力電流か制御される
The current control circuit includes a rectifier 11 as shown in FIG.
.. Transistors Q, , h transistor drive circuit 12, transistor group 13 having four transistors.
Operational amplifiers 14, 15 . provided in the feedback path. Transmitter 1
6, each of said transistors
The output current is controlled according to a current setting signal.

前記予備加熱設定量6は、第3図に示すように各管球の
各フィラメント毎に設けた複数のレベル設定器とスイッ
チ群とからなり、焦点サイズ切替信号SSや管球選択信
号ST、乃至ST3によって対応するレベル設定器が選
択されるようになっている。
As shown in FIG. 3, the preheating setting amount 6 is composed of a plurality of level setters and switch groups provided for each filament of each tube, and includes a focus size switching signal SS, a tube selection signal ST, and a switch group. The corresponding level setter is selected by ST3.

前記切替タイミング検出回路4は第4図に示すように複
数のノット回路NOT、乃至NOT、□。
As shown in FIG. 4, the switching timing detection circuit 4 includes a plurality of NOT circuits NOT, NOT, □.

複数の微分回路TR,乃至T R’、 、複数のアンド
回路AND、乃至AND6.1つのオア回路ORから構
成されており、焦点サイズや管球の切替があったときに
1つのパルスを出力する。
It is composed of multiple differentiating circuits TR, to TR', and multiple AND circuits AND, to AND6. It is composed of one OR circuit, and outputs one pulse when the focus size or tube is switched. .

次に前記回路の動作を説明する。Next, the operation of the circuit will be explained.

初めにT B I大焦点LFが選択されていたとすると
、電流制御回路1の出力は大焦点側のフィラメントトラ
ンスLFの一次巻線に接続される。また、フィラメント
トランスLFの二次側回路はTB、に接続されるので、
TBlの大焦点側は予備加熱される。このときの予備加
熱電流は、第3図に示すようにTB、LF用の設定器に
よって定められる。
If the TBI large focus LF is initially selected, the output of the current control circuit 1 is connected to the primary winding of the filament transformer LF on the large focus side. Also, since the secondary circuit of filament transformer LF is connected to TB,
The large focal point side of TBl is preheated. The preheating current at this time is determined by the TB and LF setting devices as shown in FIG.

いま、管球をTB、からTB2に切替えたとすると、フ
ィラメントトランスLFの二次側回路はTB、に接続さ
れる。また、管球か切替わったことによって切替タイミ
ング検出回路4からは1つのパルスが出力されモノマル
チMMをトリガする。
Now, if the tube is switched from TB to TB2, the secondary circuit of the filament transformer LF is connected to TB. Furthermore, when the tube is switched, one pulse is output from the switching timing detection circuit 4 to trigger the monomulti MM.

モノマルチMMは入力にパルスか入ると、予め設定され
た時間だけ出力Qを“H”レベルにまた出力Qを“L”
レベルにする。
When a pulse enters the input, the mono multi MM sets the output Q to the “H” level and the output Q to the “L” level for a preset time.
level.

その結果、電流制御回路1には、予備加熱設定器6で設
定された値に切替時補正量設定器R1で設定された値か
加算されて入力する。すなわちTB2の大焦点は管球の
切替か行われてからモノマルチMMで設定された時間だ
け、通常の予備加熱時よりも大きな電流で駆動されるこ
とになり、フィラメントの温度が定常の値に達する時間
が短縮される。
As a result, the value set by the preheat setting device 6 and the value set by the switching correction amount setting device R1 are added to the current control circuit 1 and inputted thereto. In other words, the large focal point of TB2 will be driven with a larger current than during normal preheating for the time set by the monomulti MM after the tube is switched, and the filament temperature will reach a steady value. Reaching time is reduced.

一方、モノマルチMMのQ出力は、インバータG2を介
してX線曝射制御回路(図示しない)に渡される。この
信号SBは、管球や焦点サイズを切替えた後、X線曝射
が可能になったことを表すもので、“L”レベルのとき
X線曝射が可能となる。SB倍信号、管球や焦点サイズ
を切替えたあとモノマルチMMで設定された時間だけ“
H”になり、切替直後のX線曝射を禁止する。この意味
で、このモノマルチMMはインターロック機構を構成し
ている。
On the other hand, the Q output of the monomulti MM is passed to an X-ray exposure control circuit (not shown) via an inverter G2. This signal SB indicates that X-ray irradiation is now possible after switching the tube and focus size, and when it is at the "L" level, X-ray irradiation is possible. SB double signal, only for the time set in the mono multi MM after switching the tube and focal size.
H'' and prohibits X-ray exposure immediately after switching. In this sense, this mono-multi MM constitutes an interlock mechanism.

尚、前記実施例における加算器3に代えて所定の係数を
乗算する乗算器を用いてもよい。
Note that a multiplier that multiplies by a predetermined coefficient may be used instead of the adder 3 in the above embodiment.

[発明の効果] 以上詳述した本発明では、電源投入時あるいはX線管や
焦点サイズを変更したときに予備加熱の電流値よりも大
きな電流値でフィラメントを加熱する期間を設け、予備
加熱時のフィラメント温度が短時間で所定の温度に達す
るようにするものである。
[Effects of the Invention] In the present invention described in detail above, when the power is turned on or when the X-ray tube or focus size is changed, a period is provided in which the filament is heated with a current value larger than the current value for preheating. The filament temperature reaches a predetermined temperature in a short time.

従って本発明によれば電源投入直後やX線管及び焦点サ
イズの変更直後であっても常に所定の管電流値が得られ
るX線装置を提供することができる。
Therefore, according to the present invention, it is possible to provide an X-ray apparatus that can always obtain a predetermined tube current value even immediately after turning on the power or immediately after changing the X-ray tube and focus size.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例回路図、第2図は電流制御回
路の回路図、第3図は予備加熱設定器の回路図、第4図
は切替タイミング検出回路の回路図である。 1・・・電流制御回路、3・・・加算器、4・・・切替
タイミング検出回路、 6・・・予備加熱設定器、 TB、乃至TB3・・・X線管、MM・・・モノマルチ
、SW2・・・選択スイッチ。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a current control circuit, FIG. 3 is a circuit diagram of a preheat setting device, and FIG. 4 is a circuit diagram of a switching timing detection circuit. 1... Current control circuit, 3... Adder, 4... Switching timing detection circuit, 6... Preheat setting device, TB to TB3... X-ray tube, MM... Mono multi , SW2...Selection switch.

Claims (2)

【特許請求の範囲】[Claims] (1)複数のX線管を駆動するか、もしくは1つのX線
管で複数のフィラメントを備えたX線管を駆動するX線
装置のX線管フィラメント加熱回路において、個々のX
線管及び個々のフィラメント毎に予備加熱電流を設定す
る手段と、X線管の切替又は焦点サイズの切替を検出す
る手段と、X線管及び焦点サイズの選択信号によって関
連する予備加熱設定値を選択する選択器と、1つあるい
は複数の切替時予備加熱補正値の設定手段と、予備加熱
設定値と補正値とを加算又は乗算する手段とを備え、X
線管又は焦点サイズを変更したときに切替直後から予め
設定された時間は、予備加熱電流の設定値に補正値を加
算又は乗算した値によってX線管のフィラメント電流が
制御されることを特徴とするX線管フィラメント加熱回
路。
(1) In the X-ray tube filament heating circuit of an X-ray device that drives multiple X-ray tubes or one X-ray tube that drives an X-ray tube with multiple filaments, each
means for setting a preheating current for each tube and each individual filament; means for detecting a switch of the x-ray tube or a switch of focus size; and means for determining the associated preheat set point by the x-ray tube and focus size selection signal. comprising a selector for selecting, means for setting one or more preheating correction values at the time of switching, and means for adding or multiplying the preheating set value and the correction value,
The filament current of the X-ray tube is controlled by a value obtained by adding or multiplying a correction value to a set value of the preheating current for a preset time immediately after switching when the ray tube or focal spot size is changed. X-ray tube filament heating circuit.
(2)X線管又は焦点サイズを切替えたあと、予め設定
された時間の間はX線の曝射ができないようなインター
ロック機構を設けたことを特徴とする請求項1記載のX
線管フィラメント加熱回路。
(2) The X according to claim 1, further comprising an interlock mechanism that prevents X-ray exposure for a preset time after switching the X-ray tube or focus size.
Wire tube filament heating circuit.
JP27588690A 1990-10-15 1990-10-15 X-ray tube filament heating circuit Pending JPH04149996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27588690A JPH04149996A (en) 1990-10-15 1990-10-15 X-ray tube filament heating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27588690A JPH04149996A (en) 1990-10-15 1990-10-15 X-ray tube filament heating circuit

Publications (1)

Publication Number Publication Date
JPH04149996A true JPH04149996A (en) 1992-05-22

Family

ID=17561810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27588690A Pending JPH04149996A (en) 1990-10-15 1990-10-15 X-ray tube filament heating circuit

Country Status (1)

Country Link
JP (1) JPH04149996A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229373A (en) * 2013-05-20 2014-12-08 株式会社東芝 X-ray high voltage device
JP2017027832A (en) * 2015-07-24 2017-02-02 株式会社日立製作所 X-ray generation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014229373A (en) * 2013-05-20 2014-12-08 株式会社東芝 X-ray high voltage device
JP2017027832A (en) * 2015-07-24 2017-02-02 株式会社日立製作所 X-ray generation device

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