CN1604717A - Rotary anode control method and control device therefor - Google Patents
Rotary anode control method and control device therefor Download PDFInfo
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- CN1604717A CN1604717A CN 200410090950 CN200410090950A CN1604717A CN 1604717 A CN1604717 A CN 1604717A CN 200410090950 CN200410090950 CN 200410090950 CN 200410090950 A CN200410090950 A CN 200410090950A CN 1604717 A CN1604717 A CN 1604717A
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Abstract
This invention involves a kind of rotary anode control method and its control apparatus. It can perform the next exposure according to the position of rotary anode after the last exposure. It can keep the high heat capacity and long life of rotary anode, and keep the stable power output of emitted X photoelectron energy during exposure, improve the quality of scanning and imaging. It can bring high even ray output in ling scanning mode.
Description
Technical field
The present invention relates to a kind of rotary anode control method and control device thereof.
Technical background
The X ray radiation technique is a kind of broad-spectrum practical technique, is used to various aspects such as irradiation image equipment, industrial flaw detection, internal structure detection.The detection method of X-ray machine is generally to be to place bulb on one side of instrument, another side is a detection architecture, in the middle of detected people or object are placed on, the X-ray that bulb emits passes human body or object, when passing, human body or object absorb X-rays of different amounts because the density difference, then by exposure or be detected device and accept to form electronic signal.X ray generator is made of X-ray tube and high pressure generator, X-ray tube also is bulb, general structure is made up of glass die and Can, the glass tube core is that a structure is accurate, and the high vacuum glass diode with special purpose is made of negative electrode, anode and tube wall, negative electrode has filament, collection to penetrate cover, anode has the metal or the alloys target of inclination, and such as tungsten target or molybdenum target, X-ray tube integral body is placed in the oil-overflow metal protection shell.
Existing scan mode is divided two kinds usually, face scanning and line sweep.Face scanning be exactly detection architecture be the plane, generally be exposure or detect with flat panel detector and to form electronic signal in the time of a few tens of milliseconds, once form the image of an integral body; Line sweep is exactly that light-emitting window at light concentrator is provided with collimater, and the entrance window of collimater and detector is at same horizontal plane.The central authorities of the light ejecting end of collimater are provided with long and narrow narrow slit, and the width of seam is generally very little, and its function is to make the X-ray bundle form the fan-shaped beam of an extremely narrow wire section.Fan-shaped x-beam and detected people or relative motion of object are detected by detector then and form electronic signal, and scanning is at last finished, and forms complete image.Light concentrator and collimator slit guarantee that by lead protection ray does not leak to other direction.
The basic role of X-ray tube is to convert electric energy to X ray.High pressure generator is behind the negative electrode and anode loading high pressure of bulb, cathode filament can become the red heat state and discharge electronics, on the metal or alloy target surface of anode inclination, X-ray that ejects emits a large amount of electronics that negative electrode produces with very high energy impact, forms radiographic source.The different X ray that can produce varying number and intensity according to high pressure and electric current.
Present existing X-ray tube is divided into two kinds of fixed anode and rotarting anodes, the anode metal of fixed anode maintains static, the electronic impact of sending from negative electrode is to the fixed-focus of anode, inspire X-ray, it is clear that this X-ray tube scanned picture is stablized, but in long-term use, cause anode impaired easily, common rotating anode X-ray tube is that anode shape is made a metal dish, such as tungsten disc, have and hold a rotary system, metal dish driven by motor, rotary speed are generally per minute several thousand to commentaries on classics up to ten thousand, therefore by the position of electronic impact just not on fixing local area, but be evenly distributed on the annulus area, rotor portion promptly rotates in a vacuum in tube wall inside, and rotor is the double as plate conductor in tube wall, stationary part is contained in the tube wall outside, therefore in the high speed rotating process of anode, pass through the quick distribute heat of air, therefore can use continuously, the output of X-ray energy is increased substantially.Because what accept electronic impact is a continuous face, therefore also improved useful life.But the character that is the anode X-ray surface of emission of rotation continuously is also incomplete same, therefore the continuous homogeneous that the X-ray energy of output can not be on the retention time, so in the scanning imagery process, can cause image quality to descend, more obvious in the online again scan mode of this influence.In the general present rotating anode X-ray tube, high pressure generator is under the PLC control of itself, all the rotarting anode to X-ray tube carries out FEEDBACK CONTROL, promptly when the high pressure generator startup, the electric rotating machine of anode starts, this moment, high pressure generator need receive the signal of bulb anode electric rotating machine operation, high pressure generator judges whether the anode electric rotating machine of bulb starts, if be not activated or rotary speed not enough, then high pressure generator can be to bulb power supply exposure, to guarantee that bulb can not burnt.
In the application of existing X-ray, bulb often needs to move continuously several seconds even a few hours, because the time for exposure is long, if employing fixed anode, have only fixed-focus a bit to accept electronic impact, then anode is very easily impaired, cause the life-span shorter, X-ray tube can produce heat in the use simultaneously, mainly is because be transported to the energy of X-ray tube, have only 1% to become X ray, all the other energy of 99% all are converted to heat energy, and bulb is owing to use heat very big for a long time continuously, and the heat of generation is difficult for distributing, generally can reduce, so can not under powerful situation, use continuously in thermal capacity.If adopt common rotarting anode, spin friction and energy consumption are all very big, the character of the anode X-ray surface of emission of rotation is also incomplete same continuously, therefore the X-ray energy of output can not keep continuous homogeneous, especially influence is more obvious in the online scan mode, causes image quality to descend.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, provides a kind of high heat capacity, life-span long, rotary anode control method that image quality is high and control device thereof.
The present invention solves the technical scheme that its technical problem takes: a kind of rotary anode control method may further comprise the steps:
1. anode position is fixed, and a certain position on the corresponding anode metal plate is put in cathode emission, and negative electrode is connected high-tension electricity and sent a large amount of electronics, impinges upon on the fixed position of anode metal plate, sends X ray, realizes exposure;
2. behind the end exposure, the rotation of control anode makes cathode emission put another location on the corresponding anode metal plate, promptly avoid original position after anode stop operating, the anode metal plate fixed-site is prepared exposure next time.
Rotarting anode process in the described step 2 can may further comprise the steps:
A) after exposure is finished, time-delay a period of time;
B) power supply output powers up a period of time for the anode motor, is rotated by anode driven by motor anode metal plate, and the angle that described anode motor rotates is by powering up time control;
Wherein a), b) order can be exchanged.
Exposure process in the described step 1 can may further comprise the steps:
1) anode is fixed on a certain position, cathode emission point is corresponding to a certain position of anode metal plate, not load-carrying equivalent electric motor starting, high pressure generator obtains starting working behind the signal that equivalent motor rotates, make negative electrode connection high-tension electricity and launch a large amount of electronics, impinge upon on the reflecting surface of anode metal plate, launch X-ray, form X ray, the exposure beginning;
2) equivalent motor continues to rotate, and exposure is proceeded;
3) high pressure generator quits work, and controls the brake of equivalent motor and stop operating, and negative electrode is anode metallic plate emitting electrons no longer, and exposure process finishes.
A kind of rotarting anode control device that adopts described rotary anode control method, comprise an X-ray tube, an equivalent motor, an anode electric rotating machine and an anode rotation control circuit, described high pressure generator links to each other with X-ray tube with equivalent motor, anode rotation control circuit respectively, described anode rotation control circuit links to each other with described anode electric rotating machine again and controls its rotation, and described anode electric rotating machine drives anode metal plate and rotates.
Described anode rotation control circuit can comprise two time relays and a transformer, the coil two ends of one of them time relay link to each other with high pressure generator, one end of the normally opened contact of the described time relay links to each other with power supply, the other end links to each other with zero line through behind the coil of another time relay, normally-closed contact of described another time relay with after connecting in the former limit of transformer also with its coils from parallel connection of coils, the secondary of described transformer links to each other with the anode electric rotating machine.
Described anode rotation control circuit also can comprise an indicator light, is used to indicate the operating state of described anode motor, and the normally closed electric shock of described second time relay is connected with indicator light afterwards and its coils from parallel connection of coils.
The present invention exposes by rotating anode position after the single exposure process next time again, rotating anode high heat capacity and long physical life both can have been had, also can make the X-ray energy that emits in exposure process, just can keep the energy output rating of homogeneous, improve image quality, the ray output of the high uniformity of bringing in the online Exposure mode.
Description of drawings
Fig. 1 is the structural representation of rotarting anode control device of the present invention
Fig. 2 is the schematic diagram of rotarting anode control circuit in the rotarting anode control device of the present invention
Fig. 3 is the sequential chart of the rotarting anode control device course of work among the present invention
Embodiment
The present invention will be further described below in conjunction with specific embodiment.
The present invention is the exposal control method that the advantage of the existing two kinds of X-ray tubes of a kind of combination is avoided its shortcoming again, holding anode fixed-site when the exposure beginning, the surface of emission remains unchanged like this, the X-ray energy that emits just can keep the energy output rating of homogeneous in exposure and scanning process, reach higher image quality, after single exposure and scanning process finish, drive angle of anode rotation, adjust the position of anode by the rotation of anode, make the new positive plate position of cathode electronics bump when next time exposing, avoid anode that some time exposures are caused impaired.
Its concrete implementation step is as follows:
1) anode position is fixed, cathode emission point is corresponding to a certain position of anode metal plate, not load-carrying equivalent electric motor starting, high pressure generator obtains beginning to provide high-tension electricity to X-ray tube behind the signal that equivalent motor rotates, make negative electrode connection high-tension electricity and launch a large amount of electronics, impinge upon on the reflecting surface of anode metal plate, launch X-ray, form X ray, realize the exposure beginning;
2) equivalent motor continues to rotate, and exposure is proceeded;
3) high pressure generator quits work, and controls the brake of equivalent motor and stop operating, and negative electrode is anode metallic plate emitting electrons no longer, and exposure process finishes;
4) behind the end exposure, delay time the end time, the heat that the exposure process that is used to leave produces, delay time is pressed actual needs and is decided;
5) power supply is exported to the anode motor, anode driven by motor anode is rotated, angle that described motor rotates and position are by the time decision of power supply input, and control by high pressure generator, till turning to positions different when exposing with last time, the power supply output time is pressed actual needs and is decided, and after anode position is fixing, prepares exposure next time.
Fig. 1 has provided structure and the control principle that adopts the rotarting anode control device of the inventive method, constitute by an X-ray tube, an equivalent motor, an anode electric rotating machine and an anode rotation control circuit, described high pressure generator links to each other with X-ray tube with equivalent motor, anode rotation control circuit respectively, described anode rotation control circuit links to each other with described anode electric rotating machine again and controls its rotation, and described anode electric rotating machine drives anode metal plate and rotates.Control end provides control signal to high pressure generator, high pressure generator connects the equivalent motor of a zero load, when the single exposure signal provides, after high pressure generator receives the exposure signal of control end, controlling equivalent motor rotates, the effect of equivalence motor is the feedback to an operating state of high pressure generator, after making dual pressure controller receive the working state signal of equivalent motor like this, just can provide discharge energy by the bio-occlusion X-ray tube, the control cathode discharge, in the time of whole exposure, the position of anode can both immobilize like this, has guaranteed the uniformity of output ray simultaneously.
After single exposure finishes, high pressure generator is given control signal of anode rotation control circuit, described anode rotation control circuit as shown in Figure 2, comprise two time relay K1, K2, a transformer T1 and an indicator light L1, the two ends of described relay K 1 coil link to each other with the control end of high pressure generator, the end of the normally opened contact K11 of K1 links to each other with the 220V power supply, link to each other with zero line behind the coil of other end elapsed time relay K 2, a normally-closed contact K21 of described relay K 2 connects with indicator light afterwards and the coils from parallel connection of coils of K2, another normally-closed contact K22 with after connecting in the former limit of transformer T1 also with the coils from parallel connection of coils of K2, the secondary of described transformer T1 links to each other with the anode electric rotating machine, and the connection of all the other each end points is identical with original control connection.The coil that the control signal of sending from high pressure generator inputs to described time relay K1 provides energy, make relay K 1 work that picks up counting, behind time-delay a period of time T1, the normally opened contact closure of K1, make time relay K2 energized, this moment, the coil of time relay K2 was started working and timing, T2 is after the time for process, the normally-closed contact of the K2 of relay disconnects, in the time period of T2, transformer T1 and indicator light L1 be energized, and step-down transformer is reduced to 18V with the voltage of 220V and inputed to the anode electric rotating machine, indicator light L1 is bright simultaneously, and the rotation of indication anode is carried out.Because the rotating speed of anode electric rotating machine is controlled by voltage, the anode electric rotating machine can only as long as control the time of rotation, just can accurately be controlled the angle of rotation with very little speed rotation like this, removes the position of exposure last time, exposes with reposition.
The sequential chart of described rotational voltage control circuit as shown in Figure 3, after X-ray tube single exposure process finishes, the anode rotation control circuit is by time-delay relay K1 control T1 time of time-delay, controlling to the anode electric rotating machine through a step-down transformer T1 and another time relay K2 provides an operating voltage and keeps a period of time T2 again, to finish the rotary course of anode electric rotating machine, described T1 is the delay time that is used to dispel the heat behind the end exposure, and described T2 is the rotation work time of anode electric rotating machine.
Claims (6)
1, a kind of rotary anode control method is characterized in that, may further comprise the steps:
1) anode position is fixed, and a certain position on the corresponding anode metal plate is put in cathode emission, and negative electrode is connected high-tension electricity and sent a large amount of electronics, impinges upon on the fixed position of anode metal plate, sends X ray, realizes exposure;
2) behind the end exposure, control anode rotation makes cathode emission put another location on the corresponding anode metal plate, promptly avoid original position after anode stop operating, the anode metal plate fixed-site is prepared exposure next time.
2, rotary anode control method according to claim 1 is characterized in that: the rotarting anode process described step 2) may further comprise the steps:
1) after exposure is finished, time-delay a period of time;
2) power supply output powers up a period of time for the anode motor, is rotated by anode driven by motor anode metal plate, and the angle that described anode motor rotates is by powering up time control;
Wherein 1) order, 2) can be exchanged.
3, rotary anode control method according to claim 1 and 2 is characterized in that: the exposure process in the described step 1) may further comprise the steps:
1) anode is fixed on a certain position, cathode emission point is corresponding to a certain position of anode metal plate, not load-carrying equivalent electric motor starting, high pressure generator obtains starting working behind the signal that equivalent motor rotates, make negative electrode connection high-tension electricity and launch a large amount of electronics, impinge upon on the reflecting surface of anode metal plate, launch X-ray, form X ray, the exposure beginning;
2) equivalent motor continues to rotate, and exposure is proceeded;
3) high pressure generator quits work, and controls the brake of equivalent motor and stop operating, and negative electrode is anode metallic plate emitting electrons no longer, and exposure process finishes.
4, a kind of rotarting anode control device that adopts rotary anode control method as claimed in claim 1, comprise an X-ray tube, an anode electric rotating machine and a high pressure generator, it is characterized in that: also comprise an equivalent motor and an anode rotation control circuit, described high pressure generator links to each other with X-ray tube with equivalent motor, anode rotation control circuit respectively, described anode rotation control circuit links to each other with described anode electric rotating machine again and controls its rotation, and described anode electric rotating machine drives anode metal plate and rotates.
5, rotarting anode control device as claimed in claim 4, it is characterized in that: described anode rotation control circuit comprises two time relays and a transformer, the coil two ends of one of them time relay link to each other with high pressure generator, one end of the normally opened contact of the described time relay links to each other with power supply, the other end links to each other with zero line through behind the coil of another time relay, normally-closed contact of described another time relay with after connecting in the former limit of transformer also with its coils from parallel connection of coils, the secondary of described transformer links to each other with the anode electric rotating machine.
6, according to claim 4 or 5 described rotarting anode control device, it is characterized in that: described anode rotation control circuit also comprises an indicator light, be used to indicate the operating state of described anode motor, the normally closed electric shock of described second time relay is connected with indicator light afterwards and its coils from parallel connection of coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410090950 CN1265683C (en) | 2004-11-12 | 2004-11-12 | Rotary anode control method and control device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410090950 CN1265683C (en) | 2004-11-12 | 2004-11-12 | Rotary anode control method and control device therefor |
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| Publication Number | Publication Date |
|---|---|
| CN1604717A true CN1604717A (en) | 2005-04-06 |
| CN1265683C CN1265683C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410090950 Expired - Fee Related CN1265683C (en) | 2004-11-12 | 2004-11-12 | Rotary anode control method and control device therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1953629B (en) * | 2005-10-19 | 2011-07-20 | 凹凸科技国际股份有限公司 | Lamp current balancing topologies |
| CN102946684A (en) * | 2012-07-11 | 2013-02-27 | 珠海和佳医疗设备股份有限公司 | Control method and control circuit of rotary anode X-ray tube |
| CN106134293A (en) * | 2014-03-27 | 2016-11-16 | 株式会社尼康 | The manufacture method of X-ray generator, X-ray apparatus and works |
| CN110488038A (en) * | 2019-08-13 | 2019-11-22 | 博玮科技(北京)有限公司 | A kind of rotary anode bulb rotor speed detection method and device |
| CN111447373A (en) * | 2020-04-16 | 2020-07-24 | 北京纳米维景科技有限公司 | Automatic exposure control system and image correction method |
-
2004
- 2004-11-12 CN CN 200410090950 patent/CN1265683C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1953629B (en) * | 2005-10-19 | 2011-07-20 | 凹凸科技国际股份有限公司 | Lamp current balancing topologies |
| CN102946684A (en) * | 2012-07-11 | 2013-02-27 | 珠海和佳医疗设备股份有限公司 | Control method and control circuit of rotary anode X-ray tube |
| CN106134293A (en) * | 2014-03-27 | 2016-11-16 | 株式会社尼康 | The manufacture method of X-ray generator, X-ray apparatus and works |
| TWI674039B (en) * | 2014-03-27 | 2019-10-01 | 日商尼康股份有限公司 | X-ray generating device, X-ray device, and manufacturing method of structure |
| CN110488038A (en) * | 2019-08-13 | 2019-11-22 | 博玮科技(北京)有限公司 | A kind of rotary anode bulb rotor speed detection method and device |
| CN111447373A (en) * | 2020-04-16 | 2020-07-24 | 北京纳米维景科技有限公司 | Automatic exposure control system and image correction method |
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| Publication number | Publication date |
|---|---|
| CN1265683C (en) | 2006-07-19 |
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Granted publication date: 20060719 Termination date: 20101112 |