CN109709380A - Detect method and device, computer equipment, storage medium and the medical imaging device of accelerator working characteristics - Google Patents
Detect method and device, computer equipment, storage medium and the medical imaging device of accelerator working characteristics Download PDFInfo
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- CN109709380A CN109709380A CN201811637859.8A CN201811637859A CN109709380A CN 109709380 A CN109709380 A CN 109709380A CN 201811637859 A CN201811637859 A CN 201811637859A CN 109709380 A CN109709380 A CN 109709380A
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Abstract
This application involves medical imaging device technical fields, more particularly to a kind of method and device, computer equipment, storage medium and medical imaging device for detecting accelerator working characteristics.A method of detection accelerator working characteristics, comprising: obtain reference C-V characteristic of the filament under reference vacuum environment；Acquire detection electric current of the filament in the case where detecting voltage；It is described with reference to C-V characteristic to judge whether the corresponding relationship between the detection voltage and the detection electric current meets；And when the detection voltage and the corresponding relationship detected between electric current do not meet the reference C-V characteristic, confirm that the working characteristics of the accelerator is abnormal, effectively to avoid influencing the working performance of electron gun because the vacuum environment of accelerating tube vacuum degree decline occurs, and the operation of accelerator is influenced because electron gun is abnormal.
Description
Technical field
The present invention relates to medical imaging device technical fields, more particularly to a kind of method for detecting accelerator working characteristics
And device, computer equipment, storage medium and medical imaging device.
Background technique
Medical accelerator generally comprises electron gun and linear accelerating pipe, and the vacuum environment phase of electron gun and linear accelerating pipe
It is logical, so electron gun or linear accelerating pipe when something goes wrong, will affect mutual normal work.For example, in accelerating tube
When occurring vacuum degree decline in vacuum environment, adverse effect can be caused to the working performance of electron gun；In addition, vacuumize from
When son pump is abnormal, such as the damage of ionic pump high-voltage line, the damage of the ionic pump pump housing, it can not judge that accelerating tube is true by pumping electric current
The vacuum degree of Altitude.
Summary of the invention
For at least one above-mentioned technical problem, this application provides a kind of methods and dress for detecting accelerator working characteristics
It sets, computer equipment, storage medium and medical imaging device, the reference VA characteristic curve based on electron gun can be judged
Whether the working characteristics of accelerator is abnormal, and then effectively avoids the shadow due to vacuum environment of accelerating tube vacuum degree decline occurs
The working performance of electron gun is rung, and influences the operation of accelerator because electron gun is abnormal.
In an alternative embodiment, a method of detection accelerator working characteristics, the accelerator includes vacuum
The electron gun and accelerating tube that environment communicates, the electron gun include filament；The described method includes:
Obtain reference C-V characteristic of the filament under reference vacuum environment；
Acquire detection electric current of the filament in the case where detecting voltage；
It is described with reference to C-V characteristic to judge whether the corresponding relationship between the detection voltage and the detection electric current meets；
And
When corresponding relationship between the detection voltage and the detection electric current does not meet the reference C-V characteristic, really
The working characteristics for recognizing the accelerator is abnormal；
Wherein, the reference vacuum environment is the vacuum environment that the electron gun works normally.
In an alternative embodiment, the detection voltage includes current voltage, and the detection electric current includes current electricity
Stream；The acquisition filament is the step of detecting the detection electric current under voltage, comprising:
The voltage and current of the filament is measured in real time, to obtain the current voltage and the current flow；
Wherein, the corresponding relationship between the current voltage and the current flow does not meet described with reference to C-V characteristic
When, confirm that the vacuum degree of the current vacuum environment of the accelerator is abnormal.
In an alternative embodiment, the detection voltage includes at least two test voltages, the detection electric current packet
It includes and the one-to-one at least two tests electric current of the test voltage；Detection of the acquisition filament in the case where detecting voltage
The step of electric current, comprising:
The filament is tested at least twice, to obtain one-to-one at least two test voltage and described
At least two test electric currents.
In an alternative embodiment, the method also includes:
According to the first numerical value, abnormal judgment threshold is set；First numerical value is the total number of the test voltage, described
Abnormal judgment threshold is less than or equal to first numerical value；
The corresponding relationship recorded between the corresponding test electric current does not meet the survey with reference to C-V characteristic
The number for trying voltage is second value；
Judge whether the second value is more than or equal to the abnormal judgment threshold；And
When the second value is more than or equal to the abnormal judgment threshold, the current vacuum of the accelerator is confirmed
The vacuum degree of environment is abnormal.
In an alternative embodiment, the method also includes:
After confirming that the vacuum degree of the current vacuum environment of the accelerator is abnormal, triggering vacuum degree exception
Alarm signal.
In an alternative embodiment, the method also includes:
After confirming that the vacuum degree of the current vacuum environment of the accelerator is abnormal, the electron gun is turned off
And/or the replacement accelerating tube.
In an alternative embodiment, detection voltage and the inspection of filament described in default phase acquisition are in the filament
Survey electric current；
Wherein, the C-V characteristic with reference to C-V characteristic for the filament in the default stage, and in the default rank
Duan Zhong, the resistance stabilization of the filament is within the scope of preset resistance.For example, when the default stage can work for filament, except preheating
Segment limit when other outside stage and service stage.
In an alternative embodiment, the reference C-V characteristic under reference vacuum environment that obtains the filament
Step, comprising:
Obtain VA characteristic curve of the filament under the reference vacuum environment；
It is obtained based on the VA characteristic curve described with reference to C-V characteristic.
In an alternative embodiment, described that the step with reference to C-V characteristic is obtained based on the VA characteristic curve
Suddenly, comprising:
Using the VA characteristic curve as center line, C-V characteristic surge area is set；
The C-V characteristic that the C-V characteristic surge area is presented refers to C-V characteristic as described.
In an alternative embodiment, described using the VA characteristic curve as center line, setting C-V characteristic fluctuates
The step of region, comprising:
It is fluctuation with predetermined current in the case where keeping voltage value constant using the VA characteristic curve as center line
The C-V characteristic surge area is arranged in amplitude.
In an alternative embodiment, the predetermined current is 0.1A-0.3A.
In an alternative embodiment, present invention also provides a kind of computer equipment, including memory and processor,
The memory is stored with computer program, and the processor realizes side described in any of the above-described when executing the computer program
The step of method.
In an alternative embodiment, it present invention also provides a kind of computer readable storage medium, is stored thereon with
Computer program is realized when the program is executed by processor such as the step of above-mentioned any one the method.
In an alternative embodiment, described present invention also provides a kind of device for detecting accelerator working characteristics
Accelerator includes the electron gun and accelerating tube that vacuum environment communicates, and the electron gun includes filament；Described device includes:
Module is obtained, for obtaining reference C-V characteristic of the filament under reference vacuum environment；
Acquisition module, for acquiring detection electric current of the filament in the case where detecting voltage；
First judgment module, for judging whether the corresponding relationship between the detection voltage and the detection electric current meets
It is described to refer to C-V characteristic；And
Confirmation module does not meet the reference for the corresponding relationship between the detection voltage and the detection electric current
When C-V characteristic, confirm that the working characteristics of the accelerator is abnormal；
Wherein, the reference vacuum environment is the vacuum environment that the electron gun works normally.
In an alternative embodiment, the detection voltage includes current voltage, and the detection electric current includes current electricity
Stream；
The acquisition module is for being measured in real time the voltage and current of the filament, to obtain the current voltage
With the current flow；
Wherein, corresponding relationship of the confirmation module between the current voltage and the current flow is not met
When the reference C-V characteristic, confirm that the vacuum degree of the current vacuum environment of the accelerator is abnormal.
In an alternative embodiment, the detection voltage includes at least two test voltages, the detection electric current packet
It includes and the one-to-one at least two tests electric current of the test voltage；
Wherein, the acquisition module is one-to-one described to obtain for being tested at least twice the filament
At least two test voltages and at least two tests electric current.
In an alternative embodiment, the first judgment module includes the first judging unit and second judgment unit,
First judging unit is used to judge whether the corresponding relationship between each detection voltage and corresponding detection electric current to meet the ginseng
Examine C-V characteristic；Above-mentioned device may also include that
Setup module, for abnormal judgment threshold to be arranged according to the first numerical value；First numerical value is the test voltage
Total number, it is described exception judgment threshold be less than or equal to first numerical value；
Logging modle is connect with first judging unit, for recording pair between the corresponding test electric current
It should be related to that the number for not meeting the test voltage with reference to C-V characteristic is second value；
Wherein, the second judgment unit is connect with setup module and the logging modle respectively, for judging described
Whether two numerical value are more than or equal to the abnormal judgment threshold；And
The confirmation module is connect with the second judgment unit, for being more than or equal to the exception in the second value
When judgment threshold, confirm that the vacuum degree of the accelerator vacuum environment is abnormal.
In an alternative embodiment, present invention also provides a kind of medical imaging devices, it may include:
Medical imaging device ontology has accelerator, and the accelerator includes the electron gun and add that vacuum environment communicates
Speed pipe, the electron gun includes filament；And
The device of detection accelerator vacuum environment as described in above-mentioned any one, for special according to the volt-ampere of the filament
Property judges whether the working characteristics of the accelerator is abnormal.
Detailed description of the invention
Fig. 1 is the flow diagram that the method for accelerator working characteristics is detected in the embodiment of the present application；
Fig. 2 is the modular structure schematic diagram that the device of accelerator working characteristics is detected in the embodiment of the present application；
Fig. 3 is the modular structure signal that the device of accelerator working characteristics is detected in another alternative embodiment of the application
Figure；
Fig. 4 is the modular structure schematic diagram of the embodiment of the present application traditional Chinese medicine image documentation equipment；
Fig. 5 is the modular structure schematic diagram of computer equipment in the embodiment of the present application；
Fig. 6 is that the process for the method that the C-V characteristic in the embodiment of the present application based on filament detects accelerator working characteristics is shown
It is intended to；
Fig. 7 is the VA characteristic curve schematic diagram of filament in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Since the linear accelerating pipe in medical accelerator needs to operate in ultra-high vacuum environment, and linear accelerating pipe is logical
Cross soldering etc. techniques accelerated in vacuum environment come the electron beam for guaranteeing that electron gun is emitted, then pass through beryllium window such that
Electron beam output after acceleration generates X-ray on target, i.e. electron gun communicates in vacuum environment with linear accelerating pipe.
But after longtime running, because of factors such as ionic pump non-normal workings, it will lead to medical accelerator
Vacuum degree in accelerating tube slowly declines, to will affect the working characteristics and cathode life of electron gun, under serious conditions even
It will lead to electron gun and accelerating tube scrapped.
Against the above technical problems, what inventor was creative proposes a kind of method for detecting accelerator working characteristics, for
The electron gun and accelerating tube that vacuum environment included by accelerator communicates judge to add based on the C-V characteristic of filament in electron gun
Whether the working characteristics (such as vacuum environment in accelerating tube) of fast pipe is abnormal, consequently facilitating subsequent take measures to protect electricity
Sub- rifle and accelerating tube extend the service life of accelerating tube.
Specifically, due in electron gun filament be similar to resistance, and the resistance value size of filament and environment temperature height exist
Corresponding relationship, so by when the test voltage of application certain rule (as from small to large), passing through on filament and detecting filament
On the electric current flowed through can obtain the volt-ampere curve of the filament.If filament changes (such as resistance value changes),
Then the C-V characteristic of filament can change.Simultaneously as the vacuum environment in accelerating tube be unlikely to be absolute vacuum, so
There will be some gaseous impurities in locating vacuum environment in electric rifle chamber, when above-mentioned gaseous impurity is adsorbed on filament
When (being adsorbed on cathode), the resistance value of filament will be made to be different from the resistance value under absolute vacuum, and different true
In reciprocal of duty cycle environment, the volt-ampere that the resistance value of filament can show filament in otherness relevant to vacuum degree namely electron gun is special
Linearity curve can have biggish difference.Based on above-mentioned analysis, the proposition of inventor's creativeness, based on filament in different vacuum degree rings
The C-V characteristic difference that border is shown currently can not be right in real time with solution to detect the vacuum degree of vacuum environment in accelerating tube
The technical issues of accelerating tube vacuum degree is detected finds that ionic pump such as does not work at the failures, consequently facilitating subsequent in time
Electron gun and accelerating tube are effectively protected using measures such as shutdown filament voltages；Meanwhile by combining electron gun
The factors such as service life, moreover it is possible to the service condition of gun cathode is judged using C-V characteristic detected, to be yes
The relevant component of no replacement makes effective anticipation.
Fig. 1 is the flow diagram that the method for accelerator working characteristics is detected in the embodiment of the present application.It is optional at one
In embodiment, as shown in Figure 1, a kind of method for detecting accelerator working characteristics, can examine using the working characteristics of medicine accelerating tube
It surveys, and the medical accelerating tube may include the interconnected electron gun and accelerating tube of vacuum environment, and electron gun includes cathode, on
The method stated specifically can comprise the following steps that
Step S11 obtains reference C-V characteristic of the filament under reference vacuum environment.
Specifically, can by under reference vacuum environment, by the voltage and corresponding electric current of detection filament at work,
And the reference C-V characteristic of filament obtained can be characterized with reference to VA characteristic curve by drawing.Wherein, above-mentioned reference
Vacuum environment is the vacuum environment of vacuum environment namely the specified vacuum level requirements of electron gun that electron gun can work normally.
Step S12 acquires detection electric current of the filament in the case where detecting voltage.
Specifically, can accelerator in actual use, synchronized and detected by the voltage and current to filament, can also be
The detection electric current of filament is acquired under preset detection voltage, that is, is obtained there are the current voltage of corresponding relationship and currently electric
Stream.
In an alternative embodiment, the measure in step S11 can be also corresponded to, to obtain filament in actual use
C-V characteristic is detected, it such as can be according to above-mentioned there are the current voltage of corresponding relationship and current flow, based on same with step S11
Or same coordinate system is characterized, Jin Erbian to draw detection VA characteristic curve with the detection C-V characteristic to filament
It is operated in the judgement of subsequent step S13.
Whether step S13, the corresponding relationship that judges to detect voltage and detect between electric current meet with reference to C-V characteristic；If inspection
The corresponding relationship surveying voltage and detecting between electric current is not met with reference to C-V characteristic, then can continue step S14.
Specifically, whether can be met with reference to volt-ampere according to the corresponding relationship between acquired detection voltage and detection electric current
Characteristic.Such as the reference VA characteristic curve that can be will acquire is compared with detection VA characteristic curve, if between two curves
Otherness be greater than preset error range, then can determine that the detection voltage and detect electric current between corresponding relationship do not meet ginseng
C-V characteristic is examined, and then continues subsequent step S14；Meanwhile when the otherness between two above-mentioned curves is in preset mistake
When in poor range, then it can determine that the detection voltage and the corresponding relationship detected between electric current meet with reference to C-V characteristic, and can be after
It is continuous to carry out step S12, to carry out data acquisition and relationship judgement operation next time.
Meanwhile can also according to current flow corresponding to acquired at least one current voltage and each current voltage,
Simultaneously based on corresponding reference current is obtained with reference to VA characteristic curve, the current of the same current voltage of correspondence is then calculated
Difference between electric current and acquired reference current, and by judging whether the difference is being preset in error range, Huo Zhe
Whether the number of difference is greater than preset threshold in default error range, to determine the corresponding pass between detection voltage and detection electric current
Whether system meets with reference to C-V characteristic.
For example, if judging all differences whether in the default error, it is determined that detection voltage and detection electric current
Between corresponding relationship meet with reference to C-V characteristic, and in order to further promote the accuracy of judgement, can also be taken the post as in judgement
When one difference is not in the default error, continues judgement and sentence positioned at whether the number for presetting difference in error range is greater than exception
Disconnected threshold value, the and when number for being only located at difference in default error range is less than abnormal judgment threshold, just determine detection voltage and
Corresponding relationship between detection electric current is not met with reference to C-V characteristic.Wherein, above-mentioned abnormal judgment threshold can be based on detection
The quantity for obtaining detection voltage is set according to detection accuracy demand and in combination with other relevant factor considerations, and this is different
Normal judgment threshold is less than or equal to the quantitative value of above-mentioned detection voltage, while detecting between voltage and detection electric current is to correspond
's.
In addition, can also by gradually promoted or reduced detection voltage value, successively to obtain above-mentioned detection electric current, so as to
In the current C-V characteristic of acquisition, while it can also promote the accuracy of detection judgement.For example, can will test voltage set gradually for
5v, 4.5v and 4v also can detect voltage and set gradually as 4v, 4.5v and 5v；Then, believe according to the arrangement of above-mentioned detection voltage
Breath successively acquires the detection electric current of the filament under each detection voltage.
Step S14 confirms institute when the corresponding relationship between detection voltage and detection electric current is not met with reference to C-V characteristic
The working characteristics for stating accelerator is abnormal.
Specifically, when the corresponding relationship between detection voltage and detection electric current is not met with reference to C-V characteristic, then it can be true
The working characteristics for recognizing accelerator is abnormal, and can synchronize the alarm signal of triggering vacuum degree exception, such as triggers warning device hair
The various forms of warning messages such as sound, light, electricity, magnetic, wave out, with remind in time staff's accelerator electron gun and/
Or there is exception in the vacuum degree of accelerator.
It should be noted that " filament " can also be the cathode construction of electron gun in the embodiment of the present application, it can also be only
The filament in electron gun is referred to, as long as the C-V characteristic for being somebody's turn to do " filament " is able to reflect the vacuum degree of accelerating tube vacuum environment i.e.
It can.
In an alternative embodiment, after the working characteristics of confirmation accelerator is abnormal, it may also be combined with electron gun
Characteristic and using the information such as time, further to be judged the failure for the accelerator being abnormal, currently with judgement
It is the vacuum degree appearance exception of electron gun exception or accelerator；In addition, can also continue to the vacuum degree to electron gun and accelerator
Detected, with determine be really electron gun itself break down cause filament abnormal or the vacuum degree of accelerator reduces and
The vacuum degree of filament exception or electron gun and accelerator is caused to occur exception simultaneously.
In an alternative embodiment, since within the scope of normal service life, electron gun generally seldom breaks down,
And accelerator is in electron gun and the vacuum environment of linear accelerating pipe then because communicating, so be easy to occur because of ionic pump abnormal
And it is abnormal to cause the vacuum degree of the electron gun of accelerator to occur, so the work of accelerator is confirmed within the scope of specified service life
When characteristic is abnormal, it can be caused by way of the electric energy and/or replacement accelerating tube that turn off electron gun to avoid to electron gun
Further adverse effect, and after being repaired to vacuum degree and abnormal filament, can recycle again carry out above-mentioned steps S12~
S13, while confirming whether above-mentioned reparation is effective, moreover it is possible to whether break down, i.e., recycled again to electron gun itself
After above-mentioned steps S12~S13, confirm that the working characteristics of accelerator is normal, is then strictly to accelerate when can determine last detection
The vacuum degree of device occurs abnormal；And if again recycle above-mentioned steps S12~S13 after, confirm the working characteristics of accelerator still
When occurring abnormal, then can determine whether it is that electron gun itself breaks down.
It in an alternative embodiment, can also be according to being obtained when the vacuum degree that confirmation is only accelerator occurs abnormal
VA characteristic curve must be detected to judge the service condition of electron gun, to prejudge to the component needed replacing in electron gun.
In another alternative embodiment, as shown in Figure 1, before recycling above-mentioned step S12~S13 again, or
After the working characteristics of confirmation accelerator is normal, above-mentioned method may also include that
Step S15 waits preset interval time.
Specifically, can be further continued for carrying out step S12 after waiting preset interval time, to reduce the frequency of detection, reduce
Testing cost.
In an alternative embodiment, in order to further ensure that the accuracy of detection, the default rank that can work in filament
Section acquires above-mentioned detection electric current, and presets the voltage in the stage on filament and can be maintained at a metastable voltage model at this
In enclosing, it will not be changed with the variation of the factors such as operating time, environment temperature.For example, the default stage can be for except lamp
Working stage other than the warm-up phase of silk because in warm-up phase, on filament voltage value can with the increase of operating time and
It is gradually increased.It is above-mentioned meanwhile in order to avoid above-mentioned detection operates having adverse effect on to the normal work of medical instrument
The default stage also the service stage of filament is removed, i.e., the default stage is set as after warm-up phase, and is using
Period before or after stage to ensure to detect the accuracy of the data obtained, while being also avoided that accelerator just
Often work has an adverse effect.
In an alternative embodiment, in order to promoted detection accelerator working characteristics method serious forgiveness, can be upper
It states in the step S13 of any embodiment, line centered on VA characteristic curve that can be acquired, in the VA characteristic curve
Two sides are arranged two and the boundary line of the centerline parallel, it is subsequent using in regional scope defined by two boundary lines as marking
Quasi- C-V characteristic carries out the foundation that subsequent working characteristics judges extremely.For example, the volt that can be obtained under reference vacuum environment
Peace characteristic curve is center line, is that above-mentioned two are arranged in fluctuation floating with predetermined current in the situation for keeping voltage value constant
Boundary line, and then limit C-V characteristic surge area；Wherein, above-mentioned predetermined current can be 0.1A~0.3A, and this is default
The range of electric current can also carry out the adjustment of adaptability according to actual needs.
In the above-described embodiment, by the way that under different vacuum environments, detection obtains the C-V characteristic of filament respectively, subsequent
Further according to the difference between different C-V characteristics, to realize the damage to vacuum abnormal conditions or gun cathode in accelerating tube
Bad situation judged in time, in order to which the corresponding abnormal work characteristic of subsequent basis alarmed, is turned off and/or tip parts
The operation such as replacement, not only operation is simple for judgement, and at low cost, moreover it is possible at the same to electron gun service performance and service life into
Row anticipation.
Fig. 2 is the modular structure schematic diagram that the device of accelerator working characteristics is detected in the embodiment of the present application.Such as Fig. 2 institute
Show, a kind of device for detecting accelerator working characteristics additionally provided in embodiments herein, can be applicable to including electron gun and
In the accelerator of accelerating tube, and the vacuum environment of electron gun and accelerating tube is interconnected, and lamp is provided in the cathode of electron gun
Silk；Above-mentioned device may include obtaining module 21, acquisition module 22, confirmation module 23 and first judgment module 24 etc., obtain mould
Block 21 can be used for obtaining the reference of (i.e. the vacuum environment of electron gun normal work) under reference vacuum environment of above-mentioned filament and lie prostrate
Pacify characteristic, acquisition module 22 can be used for acquiring detection electric current of the filament in the case where detecting voltage, and first judgment module 24 respectively with
Above-mentioned acquisition module 21 and acquisition module 22 connect, to be for judging to detect voltage and detect the corresponding relationship between electric current
It is no to meet above-mentioned reference C-V characteristic；Wherein, confirmation module 23 is then also connect with first judgment module 24, and can be used for basis
The judging result that first judgment module 24 is exported, to confirm whether the working characteristics of accelerator is abnormal；For example, receiving
When not meeting to the corresponding relationship between detection voltage and detection electric current with reference to C-V characteristic, the work of accelerator is confirmed and exported
Characteristic is abnormal relevant information.
In an alternative embodiment, as shown in Fig. 2, above-mentioned detection voltage may include current voltage, and electricity is detected
Stream can then be corresponded to including current flow, and above-mentioned acquisition module 22 can also be used to examine the voltage and current of filament in real time
It surveys, to obtain above-mentioned current voltage and corresponding current flow；Meanwhile confirmation module 23 then can be applied to current voltage with
When corresponding relationship between current flow is not met with reference to C-V characteristic, the true of the current vacuum environment of accelerator is confirmed and exported
The relevent information that reciprocal of duty cycle is abnormal.Wherein, above-mentioned confirmation module 23 can carry out above-mentioned operation based on a test voltage,
It may be based on multiple test voltages and carry out above-mentioned operation.
For example, when detect voltage include at least two test voltages when, detection electric current then may include with test voltage one by one
Corresponding at least two tests electric current, i.e. acquisition module 22 are corresponded for being tested at least twice filament with obtaining
Above-mentioned at least two test voltage and at least two test electric currents.
Fig. 3 is the modular structure signal that the device of accelerator working characteristics is detected in another optional embodiment of the application
Figure.As shown in figure 3, in the device of detection accelerator working characteristics, first judges mould on the basis of can be based on structure shown in Fig. 2
Block 24 may include the first judging unit 241 and second judgment unit 242, and the first judging unit 241 can be used for judging each detection
It is described with reference to C-V characteristic whether the corresponding relationship between voltage and corresponding detection electric current meets.Wherein, above-mentioned device is also
It may include setup module 25 and logging modle 26, and setup module 25 can be used for for judging threshold according to the setting of the first numerical value is abnormal
Value, which can be the total number of test voltage, and abnormal judgment threshold is then smaller than equal to the first above-mentioned numerical value；Note
Record module 26 can then be connect with the first judging unit 241, for recording the corresponding pass between the corresponding test electric current
System does not meet the number of the test voltage with reference to C-V characteristic, and does not meet the survey with reference to C-V characteristic
Total number of examination voltage is set as second value；And second judgment unit 242 also respectively with setup module 25 and logging modle
26 connections, with for judging whether above-mentioned second value is more than or equal to abnormal judgment threshold, and confirmation module 23 then can also be with
Second judgment unit 242 connects, for confirming and exporting when the second value is more than or equal to the abnormal judgment threshold
The message that accelerator working characteristics is abnormal, for example, accelerator vacuum environment the information etc. that is abnormal of vacuum degree.
In another alternative embodiment, the device of above-mentioned detection accelerator working characteristics may also include and confirmation mould
The alarm module and the (not shown)s such as protective module that block 23 connects, for according to the received above-mentioned accelerator work of institute
The message that characteristic is abnormal, the various forms of alarm signals such as triggering sound, light, to remind operator to tie up in time
Shield operation；Meanwhile protective module can also according to the message that is abnormal of received above-mentioned accelerator working characteristics, cut off lamp
The voltage of silk, to avoid electron gun further by the adverse effect of abnormal conditions.
Fig. 4 is the modular structure schematic diagram of the embodiment of the present application traditional Chinese medicine image documentation equipment.As shown in figure 4, the application's
A kind of medical imaging device is provided in embodiment, it may include medical imaging device ontology 31 and as described in above-mentioned any one
Detect the device 32 of accelerator vacuum environment: where medical imaging device ontology 31 there can be accelerator, and the accelerator can wrap
The electron gun and accelerating tube that vacuum environment communicates are included, and electron gun then may include filament；Detect the device of accelerator vacuum environment
32 can be used for judging whether the working characteristics of the accelerator is abnormal according to the C-V characteristic of the filament.
Fig. 5 is the modular structure schematic diagram of computer equipment in the embodiment of the present application.As shown in figure 5, in the reality of the application
It applies and additionally provides a kind of computer equipment in example, including memory 41 and processor 42, the memory 41 is stored with computer
Program, the processor 42 realizes any of the above-described detection accelerator working characteristics method when executing the computer program are implemented
Step in example.
In an alternative embodiment, present invention also provides a kind of computer readable storage mediums, such as institute in Fig. 5
The memory 41 shown, the memory 41 can be to be integrated in the memory element calculated in equipment, can also be individually storage equipment,
On be stored with computer program, when which is executed by processor realize as it is above-mentioned it is any one detection accelerator working characteristics side
Step in method embodiment.
Below with reference to specific example, the method for the detection accelerator working characteristics in the application is described in detail:
Fig. 6 is that the process for the method that the C-V characteristic in the embodiment of the present application based on filament detects accelerator working characteristics is shown
It is intended to, Fig. 7 is the VA characteristic curve schematic diagram of filament in the embodiment of the present application；Wherein, the ordinate in Fig. 7 is for characterizing stream
Current value (unit A) through filament, abscissa is for characterizing the voltage value (unit V) for being applied to filament.Such as the institute of Fig. 6~7
Show, a method of the C-V characteristic based on filament detects accelerator working characteristics, it may include following steps:
Step S21 obtains reference VA characteristic curve of the filament in reference vacuum environment.
Specifically, can in reference vacuum environment (such as vacuum degree be 10-5Pa), by the filament that can be worked normally into
The detection of the multiple voltage and current of row, and the corresponding relationship according to voltage and electric current are drawn out shown in fig. 7 special with reference to volt-ampere
Linearity curve 51.
Step S22 obtains simulation practical VA characteristic curve of the filament in simulation practical vacuum environment.
Specifically, can simulation practical vacuum environment in (such as vacuum degree be 10-3Pa), by the lamp that can be worked normally
Silk carries out the detection of multiple voltage and current, and the corresponding relationship according to voltage and electric current, and it is real to draw out simulation shown in fig. 7
Border VA characteristic curve 52.Wherein, the vacuum degree of reference vacuum environment is different with the simulation vacuum degree of practical vacuum environment.
Step S23, the difference based on reference VA characteristic curve and the practical VA characteristic curve of simulation, with special with reference to volt-ampere
Linearity curve is center line, and C-V characteristic surge area is arranged.
Specifically, can be center line with reference to VA characteristic curve, based on above-mentioned difference and various demand setting electric currents
Fluctuation range, thus be set to reference to VA characteristic curve it is parallel and be located at boundary with reference to VA characteristic curve two sides
53,54, and using region defined by two boundary lines 53,54 as above-mentioned C-V characteristic surge area.
Step S24 acquires current value of the filament under predeterminated voltage in the default stage, and judges the current value above-mentioned
C-V characteristic surge area in, if positioned at within the scope of current threshold corresponding to predeterminated voltage.
Specifically, in order to ensure detection data accuracy and avoid influencing the use of accelerator, can will be above-mentioned pre-
If the stage is set as removing in other working hours outside default stage and service stage.
Wherein, when being acquired operation, the sequence that can be sequentially increased or be sequentially reduced according to voltage value, and it is adjacent pre-
If the interval of voltage can be preset interval voltage, above-mentioned current value acquisition is carried out, for example, can be according to from small to large and being spaced
The sequence of 0.5v, it can the sequence of 3v, 3.5v, 4v, 4.5v and 5v successively carry out the detection of current value；Meanwhile it can also be according to
From big to small and be spaced 0.6v sequence, it can the sequence of 5v, 4.4v, 3.8v, 3.2v and 2.6v successively carry out current value
Detection.
Step S25, statistics is located at the sum with the current value outside current threshold range corresponding to predeterminated voltage, and is arranged
For first total (such as the first sum be 4), and judge whether the sum (such as is sentenced extremely greater than preset exception judgment threshold
3) disconnected threshold value is.When sum is greater than preset abnormal judgment threshold, confirms and the working characteristics for exporting accelerator is abnormal
Message, and can proceed with step S26；Otherwise, step S24 can be continued after waiting preset time period.Wherein, on
The total number (such as the total number of current value is 5) for the current value that the abnormal judgment threshold stated can be obtained according to measurement is set
It is fixed.
Step S26 carries out triggering alarm, shutdown electron gun and/or the replacement operation such as accelerating tube, to avoid to electron gun into
One step adversely affects.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (11)
1. a kind of method for detecting accelerator working characteristics, which is characterized in that the accelerator includes the electricity that vacuum environment communicates
Sub- rifle and accelerating tube, the electron gun include filament；The described method includes:
Obtain reference C-V characteristic of the filament under reference vacuum environment；
Acquire detection electric current of the filament in the case where detecting voltage；
It is described with reference to C-V characteristic to judge whether the corresponding relationship between the detection voltage and the detection electric current meets；And
When corresponding relationship between the detection voltage and the detection electric current does not meet the reference C-V characteristic, institute is confirmed
The working characteristics for stating accelerator is abnormal；
Wherein, the reference vacuum environment is the vacuum environment that the electron gun works normally.
2. the method as described in claim 1, which is characterized in that the detection voltage includes current voltage, the detection electric current
Including current flow；The acquisition filament is the step of detecting the detection electric current under voltage, comprising:
The voltage and current of the filament is measured in real time, to obtain the current voltage and the current flow；
Wherein, when the corresponding relationship between the current voltage and the current flow does not meet the reference C-V characteristic,
Confirm that the vacuum degree of the current vacuum environment of the accelerator is abnormal.
3. the method as described in claim 1, which is characterized in that the detection voltage includes at least two test voltages, described
Detection electric current includes and the test voltage one-to-one at least two tests electric current；The acquisition filament is in detection electricity
The step of detection electric current of pressure, comprising:
The filament is tested at least twice, with obtain one-to-one at least two test voltage and it is described at least
Two test electric currents.
4. method as claimed in claim 3, which is characterized in that the method also includes:
According to the first numerical value, abnormal judgment threshold is set；First numerical value is the total number of the test voltage, the exception
Judgment threshold is less than or equal to first numerical value；
It records the corresponding relationship between the corresponding test electric current and does not meet the test electricity with reference to C-V characteristic
The number of pressure is second value；
Judge whether the second value is more than or equal to the abnormal judgment threshold；And
When the second value is more than or equal to the abnormal judgment threshold, the current vacuum environment of the accelerator is confirmed
Vacuum degree be abnormal.
5. the method as described in any one of claim 1-4, which is characterized in that be in default phase acquisition in the filament
The detection voltage and detection electric current of the filament；
Wherein, the C-V characteristic with reference to C-V characteristic for the filament in the default stage, and in the default stage,
The resistance stabilization of the filament is within the scope of preset resistance.
6. the method as described in any one of claim 1-4, which is characterized in that described to obtain the filament in reference vacuum
The step of reference C-V characteristic under environment, comprising:
Obtain VA characteristic curve of the filament under the reference vacuum environment；
It is obtained based on the VA characteristic curve described with reference to C-V characteristic.
7. method as claimed in claim 6, which is characterized in that described to obtain the reference volt based on the VA characteristic curve
The step of pacifying characteristic, comprising:
Using the VA characteristic curve as center line, C-V characteristic surge area is set；
The C-V characteristic that the C-V characteristic surge area is presented refers to C-V characteristic as described.
8. a kind of computer equipment, including memory and processor, the memory are stored with computer program, feature exists
In the step of processor realizes any one of claims 1 to 7 the method when executing the computer program.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
It is realized when row such as the step of any one of claim 1-7 the method.
10. a kind of device for detecting accelerator working characteristics, which is characterized in that the accelerator includes the electricity that vacuum environment communicates
Sub- rifle and accelerating tube, the electron gun include filament；Described device includes:
Module is obtained, for obtaining reference C-V characteristic of the filament under reference vacuum environment；
Acquisition module, for acquiring detection electric current of the filament in the case where detecting voltage；
First judgment module, for judging it is described whether the corresponding relationship between the detection voltage and the detection electric current meets
With reference to C-V characteristic；And
Confirmation module is not met described with reference to volt-ampere for the corresponding relationship between the detection voltage and the detection electric current
When characteristic, confirm that the working characteristics of the accelerator is abnormal；
Wherein, the reference vacuum environment is the vacuum environment that the electron gun works normally.
11. a kind of medical imaging device characterized by comprising
Medical imaging device ontology has accelerator, and the accelerator includes the electron gun and accelerating tube that vacuum environment communicates,
The electron gun includes filament；And
The device of detection accelerator vacuum environment as claimed in claim 10, for being judged according to the C-V characteristic of the filament
Whether the working characteristics of the accelerator is abnormal.
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