JPS5953680B2 - X-ray device - Google Patents
X-ray deviceInfo
- Publication number
- JPS5953680B2 JPS5953680B2 JP15331276A JP15331276A JPS5953680B2 JP S5953680 B2 JPS5953680 B2 JP S5953680B2 JP 15331276 A JP15331276 A JP 15331276A JP 15331276 A JP15331276 A JP 15331276A JP S5953680 B2 JPS5953680 B2 JP S5953680B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- filament
- ray tube
- anode
- photodetector
- 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
Links
Landscapes
- X-Ray Techniques (AREA)
Description
【発明の詳細な説明】 本発明は回転陽極型Ｘ線管を用いたＸ線装置に関する。[Detailed description of the invention] The present invention relates to an X-ray apparatus using a rotating anode X-ray tube.
一般に、この種のＸ線装置においてＸ線管が破損する原
因として
（１）過負荷を加えること、
（２）フィラメントを点火せずに高電圧を両極間に加え
ること、
（３）回転陽極が回転していないか、又は充分な回転数
に達していないうちに負荷を加えること、があげられる
。In general, the causes of damage to the X-ray tube in this type of X-ray equipment are (1) applying overload, (2) applying high voltage between the poles without igniting the filament, and (3) rotating anode. An example of this is applying a load while the motor is not rotating or has not reached a sufficient number of revolutions.
従来、Ｘ線装置では（１）に対しては過負荷防止回路が
用いられるが、（２Ｘ３）に対しては一般に防止対策が
行われていない。Conventionally, in X-ray apparatuses, an overload prevention circuit is used for (1), but no preventive measures are generally taken for (2×3).
ただ、（３）に対しては回転陽極が充分な回転数に達す
るまでの時間をかせぐ泪的で遅延回路をつけている。However, for (3), a delay circuit is added to allow time for the rotating anode to reach a sufficient rotation speed.
本発明は上記欠点を除去し、（２Ｘ３）に対してＸ線管
の破損を防止することができるＸ線装置を提供すること
を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray apparatus that eliminates the above-mentioned drawbacks and can prevent damage to the X-ray tube for (2X3).
以下図面を参照しながら本発明の一実施例について説明
する。An embodiment of the present invention will be described below with reference to the drawings.
第１図及び第２図は本実施例を示すものであり、図中１
は回転陽極型Ｘ線管、２は回転陽極、３は回転陽極２に
おけるＸ線焦点（又は帯）以外の部分に埋め込まれた反
射用金属板であって回転陽極２の焦点以外の部分よりフ
ィラメント光を強く反射する。Figures 1 and 2 show this embodiment, and 1 in the figure.
2 is a rotating anode type X-ray tube; 2 is a rotating anode; 3 is a reflective metal plate embedded in a portion of the rotating anode 2 other than the X-ray focus (or band); Reflects light strongly.
４はＸ線管の陰極で、５はこの陰極４に支持されるフィ
ラメント、６は回転陽極２で反射されたフィラメント５
の光を検出して電気信号に変換する光半導体等よりなる
光検出器、７は基準電圧発生器、８は演算増幅器、Ｒ１
，Ｒ２は入力抵抗、Ｒ３は帰還抵抗、９は周波数−電圧
変換器、１０は基準電圧発生器、１１は比較器、１２は
タイマー回路、１３はＸ線焦点（又は帯）である。4 is the cathode of the X-ray tube, 5 is the filament supported by this cathode 4, and 6 is the filament 5 reflected by the rotating anode 2.
7 is a reference voltage generator; 8 is an operational amplifier; R1;
, R2 is an input resistor, R3 is a feedback resistor, 9 is a frequency-voltage converter, 10 is a reference voltage generator, 11 is a comparator, 12 is a timer circuit, and 13 is an X-ray focus (or band).
又、第３図は基準電圧発生器７の出力電圧ｖ１、光検出
器６の出力電圧Ｖ２、演算増幅器８の出力電圧ｖ３、周
波数−電圧変換器９の出力電圧ｖ４、基準電圧発生器１
０の出力電圧ｖ５、比較器１１の出力電圧ｖ６を示すタ
イムチャートである。Further, FIG. 3 shows the output voltage v1 of the reference voltage generator 7, the output voltage V2 of the photodetector 6, the output voltage v3 of the operational amplifier 8, the output voltage v4 of the frequency-voltage converter 9, and the reference voltage generator 1.
1 is a time chart showing an output voltage v5 of 0 and an output voltage v6 of a comparator 11.
このような構成のＸ線装置の動作を説明すると、予備加
熱時には陽極２が回転しておらず、またフィラメント５
は弱く点火する。To explain the operation of an X-ray apparatus with such a configuration, the anode 2 is not rotating during preheating, and the filament 5 is not rotating.
ignites weakly.
このフィラメント５からの光は陽極２で反射されて光検
出器６に入り、この光検出器６の出力電圧ｖ２は抵抗Ｒ
１を介して演算増幅器８の反転入力端子に加えられる。The light from this filament 5 is reflected by the anode 2 and enters the photodetector 6, and the output voltage v2 of this photodetector 6 is determined by the resistance R
1 to the inverting input terminal of operational amplifier 8.
演算増幅器８の非反転入力端子には基準電圧発生器７か
ら基準電圧Ｖ１が抵抗Ｒ２を介して加えられ、光検出器
６の出力電圧ｖ２は基準電圧Ｖ１より低い。A reference voltage V1 is applied from the reference voltage generator 7 to the non-inverting input terminal of the operational amplifier 8 via a resistor R2, and the output voltage v2 of the photodetector 6 is lower than the reference voltage V1.
演算増幅器８の出力電圧Ｖ３は周波数−電圧変換器９で
その周波数成分に応じた電圧ｖ４に変換され、この電圧
■４は、比較器１１において基準電圧発生器１０からの
基準電圧Ｖ５と比較される。The output voltage V3 of the operational amplifier 8 is converted by the frequency-voltage converter 9 into a voltage v4 corresponding to its frequency component, and this voltage V4 is compared with the reference voltage V5 from the reference voltage generator 10 by the comparator 11. Ru.
演算増幅器８の出力電圧■３は正で周波数−電圧変換器
９の出力電圧Ｖ４は零のま・である。The output voltage V4 of the operational amplifier 8 is positive, and the output voltage V4 of the frequency-voltage converter 9 is zero.
タイマー回路１２は比較器１１の負の出力電圧ｖ６によ
り不動作のよ・であり、Ｘ線管１は両極間に高電圧が印
加されずＸ線曝射が阻止されている。The timer circuit 12 is inoperative due to the negative output voltage v6 of the comparator 11, and no high voltage is applied between the two poles of the X-ray tube 1, preventing X-ray radiation.
次に、準備状態になると、フィラメント５が強く点火さ
れ、陽極２が回転を始める。Then, in the ready state, the filament 5 is strongly ignited and the anode 2 begins to rotate.
この両者５．２は各々熱慣性及び動慣性があるので、除
々に目標に向かってフィラメント温度及び回転数が上が
ってくる。Both 5.2 have thermal inertia and dynamic inertia, respectively, so the filament temperature and rotation speed gradually increase toward the target.
フィラメント５の温度の上昇に伴なってフィラメント光
が増加するので、陽極２中に埋め込まれた反射用金属板
３により反射されたフィラメント光が陽極２の回転に同
期して光検出器６に入射する。As the filament light increases as the temperature of the filament 5 increases, the filament light reflected by the reflective metal plate 3 embedded in the anode 2 enters the photodetector 6 in synchronization with the rotation of the anode 2. do.
このため、光検出器６の出力電圧Ｖ２は直流電圧に陽極
２の回転数に応じたパルスが加わった波形となる。Therefore, the output voltage V2 of the photodetector 6 has a waveform in which a pulse corresponding to the rotation speed of the anode 2 is added to a DC voltage.
この電圧Ｖ２が基準電圧Ｖ１より高くなると、演算増幅
器８の出力電圧Ｖ３は負となる。When this voltage V2 becomes higher than the reference voltage V1, the output voltage V3 of the operational amplifier 8 becomes negative.
この電圧■３のパルスの周波数は周波数−電圧変換器９
で電圧に変換され、この電圧は陽極２の回転数に比例す
ることになる。The frequency of the pulse of this voltage ■3 is determined by the frequency-voltage converter 9.
is converted into a voltage, and this voltage is proportional to the number of rotations of the anode 2.
陽極２の回転数が、あらかじめ設定した回転数に比例し
た基準電圧Ｖ５よりも高くなれば比較器１１の出力電圧
ｖ６は正となる。When the rotation speed of the anode 2 becomes higher than a reference voltage V5 proportional to the rotation speed set in advance, the output voltage v6 of the comparator 11 becomes positive.
このため、タイマー回路１２が動作し、Ｘ線管１の両極
２，４間に高電圧が印加されてＸ線曝射が行われる。Therefore, the timer circuit 12 is activated, a high voltage is applied between the poles 2 and 4 of the X-ray tube 1, and X-ray exposure is performed.
フィラメント５が点火しない場合には光検出器６の出力
電圧Ｖ２は零、又は基準電圧ｖ１に比して充分に小さな
電圧となり、Ｘ線曝射が阻止される。When the filament 5 does not ignite, the output voltage V2 of the photodetector 6 becomes zero or a voltage sufficiently smaller than the reference voltage v1, and X-ray exposure is blocked.
フィラメント５が点火しても陽極２が回転しないか、又
は充分な回転数に達しない場合は周波数−電圧変換器９
の出力電圧ｖ４が基準電圧■５に比して低くなり、比較
器１１の出力電圧ｖ６は負のま・でＸ線曝射が阻止され
る。If the anode 2 does not rotate even if the filament 5 is ignited, or does not reach a sufficient rotation speed, the frequency-voltage converter 9
The output voltage v4 of the comparator 11 becomes lower than the reference voltage 5, and the output voltage v6 of the comparator 11 reaches a negative level, thereby blocking X-ray exposure.
以上のように本発明によるＸ線装置によればＸ線管のフ
ィラメント点火状態及び陽極回転数が所定の状態になる
までＸ線曝射を阻止するまで、前述の（２）タイマメン
Ｉ・を点火せずに高電圧を両極間に加えること、及び（
３）回転陽極か゛回転していないか、又は充分な回転数
に達していないうちに負荷を加えることを防止してＸ線
管の破損を防止することか゛できる。As described above, according to the X-ray apparatus according to the present invention, the above-mentioned (2) timer men I are ignited until X-ray exposure is prevented until the filament ignition state of the X-ray tube and the anode rotation speed reach the predetermined state. Applying high voltage between the poles without
3) It is possible to prevent damage to the X-ray tube by preventing a load from being applied while the rotating anode is not rotating or has not reached a sufficient number of rotations.
第１図は本発明の一実施例を示すブロック図、第２図は
同実施例の回転陽極を示す拡大側面図、第３図は上記実
施例のタイミングチャートである。
１・・・・・・Ｘ線管、２・・・・・・陽極、３・・・
・・・反射用金属板、５・・・・・・フィラメント、６
・・・・・・光検出器１．７．１０・・・・・・基準電
圧発生器、８・・・・・・演算増幅器、９・・・・・・
周波数−電圧変換器、１１・・・・・・比較器、１２・
・・・・・タイマー。FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is an enlarged side view showing a rotating anode of the same embodiment, and FIG. 3 is a timing chart of the above embodiment. 1...X-ray tube, 2...Anode, 3...
...Reflection metal plate, 5...Filament, 6
......Photodetector 1.7.10...Reference voltage generator, 8...Operation amplifier, 9...
Frequency-voltage converter, 11... Comparator, 12.
·····timer.
Claims (1)
射する反射部材をもつ回転陽極型Ｘ線管と、このＸ線管
の回転陽極で反射されたフィラメント光を検出して電気
信号に変換する光検出器と、この光検出器の出力信号の
大きさを判定することにより前記Ｘ線管のフィラメント
点火状態を判定し、かつ前記光検出器の出力信号の周波
数成分より前記回転陽極の回転数を判定してこの回転数
及び前記フィラメント点火状態が所定の状態に達するま
で前記Ｘ線管によるＸ線曝射を阻止する回路とを具備す
ることを特徴とするＸ線装置。1. A rotating anode X-ray tube that has a reflective member on one part of the rotating anode that reflects filament light more strongly than other parts, and detects the filament light reflected by the rotating anode of this X-ray tube and converts it into an electrical signal. A photodetector, the filament ignition state of the X-ray tube is determined by determining the magnitude of the output signal of the photodetector, and the rotational speed of the rotating anode is determined from the frequency component of the output signal of the photodetector. an X-ray apparatus comprising: a circuit that determines the rotational speed and prevents the X-ray tube from emitting X-rays until the rotational speed and the filament ignition state reach a predetermined state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331276A JPS5953680B2 (en) | 1976-12-22 | 1976-12-22 | X-ray device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331276A JPS5953680B2 (en) | 1976-12-22 | 1976-12-22 | X-ray device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5378191A JPS5378191A (en) | 1978-07-11 |
| JPS5953680B2 true JPS5953680B2 (en) | 1984-12-26 |
Family
ID=15559725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15331276A Expired JPS5953680B2 (en) | 1976-12-22 | 1976-12-22 | X-ray device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953680B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60154499A (en) * | 1984-01-20 | 1985-08-14 | Shimadzu Corp | Driving device for rotating anode x-ray tube |
| US6341155B1 (en) * | 2000-03-08 | 2002-01-22 | Marconi Medical Systems, Inc. | Pulse detection system for X-ray tubes |
| JP2002280195A (en) * | 2001-03-13 | 2002-09-27 | Ge Medical Systems Global Technology Co Llc | X-ray tube, its malfunction detector, and device and sytem for x-ray ct |
| JP2014132933A (en) * | 2013-01-08 | 2014-07-24 | Toshiba Corp | Medical image capturing apparatus |
-
1976
- 1976-12-22 JP JP15331276A patent/JPS5953680B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5378191A (en) | 1978-07-11 |
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