CN106604517A - Power and frequency control assembly, and corresponding method of controlling magnetron - Google Patents
Power and frequency control assembly, and corresponding method of controlling magnetron Download PDFInfo
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- CN106604517A CN106604517A CN201611023878.2A CN201611023878A CN106604517A CN 106604517 A CN106604517 A CN 106604517A CN 201611023878 A CN201611023878 A CN 201611023878A CN 106604517 A CN106604517 A CN 106604517A
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- magnetron
- frequency
- signal
- power
- output
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/02—Circuits or systems for supplying or feeding radio-frequency energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
Abstract
The invention provides a method for controlling a magnetron to be at a preset power and at a preset frequency. The method comprises the steps of receiving the to-be-set needed power and the to-be-set needed frequency of the magnetron; generating a corresponding detection signal corresponding to the needed power; setting the voltage of a high-voltage modulator and the current of an electromagnet coil; comparing a detection signal corresponding to the actual output power of the magnetron with a detection signal corresponding to the to-be-set needed power of the magnetron, and comparing a signal corresponding to the to-be-set needed frequency of the magnetron with a signal corresponding to the actual output frequency of the magnetron; on the condition that the comparison result of power signals is not consistent, adjusting the voltage of the high-voltage modulator and the current of the electromagnet coil to enable the actual output power of the magnetron to reach the required power; at the same time, on the condition that the comparison result of frequency signals is not consistent, adjusting the actual output frequency of the magnetron through a frequency tuning unit coupled to the magnetron to enable the actual output frequency of the magnetron to be assistant with the required frequency.
Description
Technical field
The present invention relates to magnetron field, and in particular to the frequency and/or Power Control of magnetron.
Background technology
Fig. 1 shows a kind of control assembly of the prior art 10, and the control assembly 10 is coupled with accelerating tube 20.Specifically
Ground, the control assembly 10 includes high voltage modulator 12, electromagnet coil 13 and the transmission that magnetron 11 is coupled with magnetron 11
Bonder 15 that waveguide 14 is coupled with transmission waveguide 14 and the isolator 16 coupled with bonder 15.Specifically, magnetron 11
It is coupled on accelerating tube 20 by transmission waveguide 14, bonder 15 and isolator 16.Wherein, aforementioned high voltage modulator 12 can be carried
For high pressure；Electromagnet coil 13 is when the circuit separated by single electromagnet power supply 17 or high voltage modulator 12 is passed through electric current
Magnetic field can be provided；Magnetron 11 can produce the microwave of certain power and certain frequency under high pressure and magnetic field excitation, should
Microwave is fed in accelerating tube 20 by the element between magnetron 11 and accelerating tube 20.In addition, the magnetron 11 is also coupled with
Frequency tuning unit 18, for adjusting the frequency of the magnetron 11, in the embodiment shown in a kind of Fig. 1, the frequency tuning list
Unit 18 can be automatic frequency control system (AFC, Automatic Frequency Controller).
For the control assembly 10 shown in Fig. 1, control assembly 10 has several output-indexes, for example output, defeated
Go out frequency and stability.Wherein, the output size of control assembly 10 exports high pressure and electromagnetism iron wire by high voltage modulator 12
What the magnetic field that circle 13 is produced determined, the output frequency of control assembly 10 is mainly by the frequency tuning devices 18 coupled with magnetron 11
Adjust, stability depends primarily on the high pressure of the generation of high voltage modulator 12 and electromagnet coil 13 produces the matching status in magnetic field.
To obtain being adapted to the accelerating tube 20 for being defined specific output energy (such as 10MeV or 6MeV) to power and frequency
The needs of the specialization of rate, it is generally necessary to which the control assembly 10 of Fig. 1 is debugged manually.Current manual debugging process one
As include according to watt level suitably adjust high voltage modulator high pressure, according to the appropriate regulating magnet magnetic field size of microwave waveform with
And frequency tuning unit regulating frequency is passed through according to the microwave frequency for detecting.However, adjusting high pressure and magnetic according to power requirement
When can affect frequency, according to can also affect power, therefore these three regulation processes to influence each other during frequency requirement regulating frequency,
It is difficult to the accurate regulation to power and frequency.
The content of the invention
The one side of first embodiment of the invention, the invention provides a kind of Power control component, including：Magnetic
Keyholed back plate；High voltage modulator, couples with the magnetron, to produce high pressure；Electromagnet coil, couples with the magnetron, to produce
Magnetisation field；Signal gathering unit, couples with the magnetron, with the corresponding sampling of the real output for gathering the magnetron
Signal；Memorizer, the output of magnetron described in pre-stored and the high pressure of the high voltage modulator and the electromagnetism iron wire
The relation of the output and corresponding rectified signal of the corresponding relation of the electric current of circle and the magnetron；Rectified signal is produced
Unit, according to the output and the relation of its corresponding rectified signal of the demand power being set and the magnetron
Produce rectified signal corresponding with the demand power being set；Signal comparing unit, with the signal gathering unit and institute
State rectified signal generation unit to couple respectively, the sampled signal that the signal gathering unit is gathered is produced with the rectified signal
The rectified signal that raw unit is produced is compared；Control unit, with the high voltage modulator, the electromagnet coil, memorizer
Couple respectively with the signal comparing unit, when its receive the magnetron be set demand power when, deposited according to described
The corresponding relation of reservoir storage sets the high pressure of the high voltage modulator and the electric current of the electromagnet coil, and according to described
The result of signal comparing unit is adjusted such that institute to the high pressure of the high voltage modulator and the electric current of the electromagnet coil
The real output for stating magnetron reaches the demand power being set.
The other side of first embodiment of the invention, there is provided a kind of linear accelerating device assembly, including acceleration
Pipe and Power control component, as it was previously stated, wherein, the magnetron of the Power control component adds the control assembly with described
Fast pipe coupling.
A kind of another aspect of first embodiment of the invention, there is provided the side of control magnetron to setting power
Method, wherein, the magnetron is coupled with high voltage modulator and electromagnet coil, and methods described includes：Receive the magnetron
The demand power being set；Produce rectified signal corresponding with the demand power being set；According to the magnetron of pre-stored
Output and the corresponding relation of the high pressure of the high voltage modulator and the electric current of the electromagnet coil set the height
The high pressure of pressure manipulator and the electric current of the electromagnet coil；By the corresponding sampled signal of the real output of the magnetron
Rectified signal corresponding with the demand power being set is compared；If comparative result is inconsistent, the high-voltage modulation is adjusted
The electric current of the high pressure of device and the electromagnet coil is so that the real output of the magnetron reaches the demand work(being set
Rate.
One side according to the second embodiment of the present invention, there is provided a kind of power and Frequency Control Module, including：Magnetic
Keyholed back plate；High voltage modulator, couples with the magnetron, to produce high pressure；Electromagnet coil, couples with the magnetron, to produce
Magnetisation field；Frequency tuning unit, couples with the magnetron, to adjust the actual output frequency of the magnetron；Frequency is produced
Unit, produces signal corresponding with the demand frequency being set of the magnetron；Signal gathering unit, with the magnetron coupling
Close, to gather the corresponding sampled signal of actual output frequency and real output of the magnetron；Memorizer, pre-stored
The corresponding relation of the output of the magnetron and the electric current of the high pressure and the electromagnet coil of the high voltage modulator,
The relation of the output of the magnetron and its corresponding rectified signal；Rectified signal generation unit, according to the magnetron
The demand power being set and the magnetron output and rectified signal corresponding relation produce set with described
The corresponding rectified signal of fixed demand power；Signal comparing unit, with the frequency generating units, the signal gathering unit and
The memorizer is coupled respectively, the output that will be gathered with the signal gathering unit from the signal of the frequency generating units
The corresponding signal of frequency is compared, and by from the corresponding sampled signal of the output of the signal gathering unit and institute
The rectified signal for stating the generation of rectified signal generation unit is compared；Control unit, with the high voltage modulator, the electric magnet
Coil, memorizer, the signal comparing unit and frequency tuning unit are coupled respectively, when it receives being set for the magnetron
Demand power when, the high pressure and the electromagnetism of the high voltage modulator are set according to the corresponding relation of the memorizer pre-stored
The electric current of iron coil, and the high pressure and the electric magnet according to the result of the signal comparing unit to the high voltage modulator
The electric current of coil is adjusted such that the output of the magnetron reaches the demand power being set；And when it receives institute
State magnetron be set demand frequency when, the frequency tuning unit is carried out according to the result of the signal comparing unit
Adjust so that the output frequency of the magnetron reaches the demand frequency being set..
Other side according to the second embodiment of the present invention, there is provided a kind of linear accelerating device assembly, including acceleration
Pipe and power and Frequency Control Module, the power and Frequency Control Module as it was previously stated, wherein, the power and frequency control
The magnetron of component processed is coupled with the accelerating tube, wherein, the accelerating tube is the accelerating tube of fixed frequency.
Another aspect according to the second embodiment of the present invention, there is provided one kind control magnetron is to setting power and sets
The method for determining frequency, including：Receive the demand power being set and demand frequency of the magnetron；The need for producing and being set
Seek the corresponding rectified signal of power；According to the output of the magnetron of pre-stored and the high pressure of the high voltage modulator with
And the corresponding relation of the electric current of the electromagnet coil sets the high pressure of the high voltage modulator and the electricity of the electromagnet coil
Stream；By the corresponding sampled signal of the real output of magnetron detection letter corresponding with the demand power being set
Number it is compared, and the corresponding signal of demand frequency of the setting is corresponding with the actual output frequency of the magnetron
Signal is compared；High pressure and the electromagnetism if power signal comparative result is inconsistent, to the high voltage modulator
The electric current of iron coil is adjusted so that the real output of the magnetron reaches the demand power being set；If frequently simultaneously
Rate signal comparative result is inconsistent, then adjust the magnetron by being coupled to the frequency tuning unit of the magnetron
Actual output frequency is until consistent with the demand frequency being set.
Interface of the present invention is simple and convenient to operate, responds rapidly, greatly shortens debug time.For example, for the present invention first
For the linear accelerating device assembly of embodiment, for the load of multiple power demand, such as various electronics of clinac
Energy requirement (if the first energy level is 6MeV, the second energy level is 10MeV), different capacity is arranged only in configuration interface to magnetron
It is capable of achieving.For the linear accelerating device assembly using second embodiment of the invention, it is possible to achieve power and frequency
The constant output of rate.
Description of the drawings
Fig. 1 is a kind of control assembly of the prior art；
Fig. 2 is the structural representation of the control assembly of first embodiment of the invention, is particularly useful for controlling power；
Fig. 3 is the control method according to Fig. 2；
Fig. 4 (a) is the configuration data (1) according to Fig. 2；
Fig. 4 (b) is the configuration data (2) according to Fig. 2；
Fig. 4 (c) is the configuration data (3) according to Fig. 2；
Fig. 4 (d) is the configuration data (4) according to Fig. 2；
Fig. 5 is the structural representation of control assembly according to the second embodiment of the present invention, be particularly useful for control power and
Frequency；
Fig. 6 is the control method according to Fig. 5；And
Fig. 7 is the possible graph of a relation of the output of magnetron and output frequency.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment explain." coupling " in text is generally used to refer to the relation that connection or signal can be transmitted that it can
To represent that direct-coupling can also be INDIRECT COUPLING relation, here is not limited.For example, in a kind of example, One function list
Unit directly can couple with another functional unit, it is also possible to by Central Control Function unit (for example, controller or control
Unit or control module) couple with other functions unit.
Fig. 2 shows the structural representation of the control assembly 100 of first embodiment of the invention.Specifically, the control
Component processed 100 includes magnetron 102, high voltage modulator 104, electromagnet coil 106, electromagnet coil power supply 108, also includes matching somebody with somebody
Put interface 110, signal gathering unit 112, memorizer 114, rectified signal generation unit 115, signal comparing unit 116 and control
Unit 118.Wherein, the high voltage modulator 104 is coupled with magnetron 102, for producing high pressure.The one end of electromagnet coil 106
Electrically connect with electromagnet coil power supply 108, the other end is coupled with magnetron 102, for producing magnetic field.Magnetron 102 is in high pressure
With can produce microwave under the excitation in magnetic field, the microwave has certain power and frequency.In the first embodiment, it is therefore intended that will
The real output of magnetron 102 is adjusted on the demand power being set.
Configuration interface 110 is used to be input into configuration parameter, wherein, configuration parameter includes the output of the magnetron 102.
Additionally, the configuration interface 110 can be the various man machine interfaces associated with magnetron 102.For example, the configuration interface can be to
Few computer software inputting interface associated with magnetron 102, has output config option, in the option on the interface
Under, multiple outputs can be included, user directly can select one of them from multiple outputs, it is also possible to arbitrarily
A certain numerical value is set, as the demand power being set.Additionally, the input mode of the demand power being set can by with calculating
Machine is wired or input through keyboard of wireless connection directly can also be input on the touchscreen.
Signal gathering unit 112 is coupled with magnetron 102, and the real output for gathering magnetron 102 is corresponding
Signal.The signal gathering unit 112 generally includes directional coupler and cymoscope, wherein, directional coupler is used to gather and decline
Subtract the output signal of magnetron 102；The amplitude signal of the output signal that cymoscope is used for after detection decay.
The output of the pre-stored magnetron 102 of memorizer 114 and the high pressure of high voltage modulator 104 and electromagnet coil
The relation of the corresponding relation of 106 electric current and the demand power being set of magnetron 102 and corresponding rectified signal.
Rectified signal generation unit 115 can be pre- according to the demand power being set of magnetron 102 and memorizer 114
The output of the magnetron 102 of storage and the relation of its corresponding rectified signal are produced and the aforementioned demand power pair being set
The rectified signal answered.The corresponding rectified signal of demand power being set is used to characterize the demand work(being set of magnetron 102
The measurement information of rate, here, can adopt detecting circuit signal corresponding with demand power, and it should be appreciated that this simultaneously
It is not restricted.
Specifically, referring to Fig. 4 (a), Fig. 4 (b), Fig. 4 (c) and Fig. 4 (d), wherein, Fig. 4 (a) shows magnetron 102
Output and the high pressure of high voltage modulator 104 between relation, Fig. 4 (b) shows the high pressure and electricity of high voltage modulator 104
Relation between the magnetic field that magnet coil 106 is produced, Fig. 4 (c) shows the electric current that electromagnet coil 106 is passed through and its generation
Relation between magnetic field, Fig. 4 (d) shows the relation between the output and detecting circuit of magnetron 102.Here, Fig. 4
A the curve of ()-(c) is formed by measuring multiple data and fitting, this data relationship be substantially rather than repeat
Property it is corresponding (that is, according to the relation of output and high-voltage value and current value after the high-voltage value and current value is input into not
Former input power value is necessarily obtained, generally individually there is deviation)；The data of Fig. 4 (d) are also that measurement is obtained, but the data of Fig. 4 (d)
Corresponding relation is accurate and repeated corresponding, i.e. for the particular demands power being set, necessarily correspond to specific detection
Voltage.
It is appreciated that memorizer 114 can for such as random access memory, read only memory, disk, CD, USB flash disk or
Cloud space etc., here does not do any restriction.In addition, the curve chart shown in aforesaid Fig. 4 (a)-Fig. 4 (d) is exemplary, it
Can also be replaced by tables of data, form of expression of data is not also limited at this, those of ordinary skill in the art can lead to
Cross various ways to realize mapping relations existing between various associated datas.And, can from Fig. 4 (a)-Fig. 4 (d)
Arrive, the relation of the output of magnetron 102 and the high pressure of high voltage modulator 104 is directly corresponding, and magnetron 102 is defeated
The relation for going out the magnetic field that power and electromagnet coil 106 are produced is indirectly corresponding.If having changed electromagnet coil 106, that
Need the data for updating Fig. 4 (c) and store in memorizer, to re-establish the output and electromagnetism of magnetron 102
The relation of the electric current of iron coil 106.
Signal comparing unit 116 is coupled respectively with signal gathering unit 112 and rectified signal generation unit 115, will letter
The rectified signal that the corresponding sampled signal of real output of number collecting unit 112 collection is produced with rectified signal generation unit
The rectified signal corresponding with the demand power being set that generation unit 115 is produced is compared.Wherein, in a kind of example,
Signal comparing unit 116 can include amplifier, magnitude comparator and analog-digital converter, wherein, amplifier is used for sampling letter
Number and rectified signal amplify；Magnitude comparator is used to compare sampled signal and rectified signal after amplifying；Analog-digital converter is used for
Analogue signal after comparing is converted into into digital signal.
Control unit 118 is coupled respectively with high voltage modulator 104, electromagnet coil 106 and signal comparing unit 116.Control
Unit processed 118 be configured as its receive magnetron 102 be set demand power when, according to memorizer 114 storage it is right
The high pressure of setting high voltage modulator 104 and the electric current of electromagnet coil 106 should be related to, and according to signal comparing unit 116
As a result high pressure and the electric current of electromagnet coil to high voltage modulator 104 is adjusted such that the reality output work(of magnetron 102
Rate reaches the demand power being set.
Optionally, the control unit 118 also includes steady marble unit 120, itself and signal gathering unit 112 and electric magnet
Coil 106 is coupled, for when the width of the corresponding signal of real output of the magnetron 102 of the collection of signal gathering unit 112
The electric current of regulating magnet coil 106 is so that at the amplitude slope of the corresponding signal of real output when value slope exceedes threshold value
In threshold range.Specifically, steady marble unit 120 mainly for the treatment of high voltage modulator 104 high pressure and electromagnet coil
The 106 unmatched situation of electric current.For example, when the timing of high pressure one of high voltage modulator 104, the electric current of electromagnet coil 106 with
Mismatch and it is lower slightly when, then the amplitude slope of the corresponding signal of the real output of magnetron 102 can be more than zero, now,
Steady marble unit 120 can raise the current value of electromagnet coil 106；Conversely, when the timing of high pressure one of high voltage modulator 104,
The electric current of electromagnet coil 106 mismatch therewith and it is slightly higher when, then the width of the corresponding signal of the real output of magnetron 102
Value slope can be less than zero, and now, steady marble unit 120 can reduce the current value of electromagnet coil 106.
Here, amplitude slope refers to take pulse top symmetrical 2 points and calculates the slope between this 2 points.Selectivity
Ground, the amplitude slope can be substituted by pulse flatness.
Exemplarily, the steady marble unit 120 for example includes delay line, magnitude comparator and analog-digital converter.Wherein, prolong
Late line is used for the amplitude signal at symmetrical 2 points of acquisition pulse top；Magnitude comparator is used for the amplitude signal to choosing and compares simultaneously
Calculate amplitude slope；Analog-digital converter is used to the amplitude slope signal for calculating is converted into into digital signal and is exported to control
Unit.
The first embodiment of the invention, its method at least include S101-S107 the step of, separately below to each step
Suddenly described in detail：
S101：Receive the demand power being set of magnetron 102.
Specifically, the step is generally completed on configuration interface 110.
S103：Rectified signal generation unit 115 can produce rectified signal corresponding with the demand power being set, and transmit
To signal comparing unit 116.
S105：According to the output and high voltage modulator 104 of the magnetron 102 of the demand power, pre-stored being set
High pressure and the corresponding relation of electric current of electromagnet coil 106 set the high pressure and electromagnetism iron wire of the high voltage modulator 104
The electric current of circle 106.
Specifically, in step S105, when control unit 118 receive magnetron 102 be set demand power when,
Look in the output of magnetron 102 shown in Fig. 4 (a) of the storage of memorizer 114 and the relation of the high pressure of high voltage modulator 104
To high-voltage value corresponding with the demand power being set, and the high pressure of high voltage modulator 104 is set to into respective value.Meanwhile, root
Fig. 4 (a), the Fig. 4 (b) and Fig. 4 (c) stored according to memorizer 114 draws corresponding with the demand power being set of magnetron 102
The current value of electromagnet coil 106, and by the current settings of electromagnet coil 106 to respective value.
S107：The corresponding sampled signal of the real output of magnetron 102 is corresponding with the demand power being set
Rectified signal is compared.
Specifically, in step s 107, when the high pressure of high voltage modulator 104 and the electric current of electromagnet coil 106 are set
After fixed, signal gathering unit 112 gathers the corresponding sampled signal of real output of magnetron 102, and by signal ratio
The corresponding sampled signal of the real output and the rectified signal in S103 steps are compared compared with unit 116.
S109：If comparative result is inconsistent, the electricity of high pressure and electromagnet coil 106 to high voltage modulator 104
Stream is adjusted so that the real output of magnetron 102 reaches the demand power being set.
Specifically, in step S109, control unit 118 always according to signal comparing unit 116 comparative result to high pressure
The high pressure of manipulator 104 carries out adapt so that the real output of magnetron 102 reaches the demand power being set.
For example, when comparative result shows that the real output of magnetron 102 than the demand power hour being set, then should increase height
The high-voltage value of pressure manipulator 104 simultaneously determines the current value of electromagnet coil 106 according to Fig. 4 (b) and Fig. 4 (c)；Conversely, then should
Reduce the high-voltage value of high voltage modulator 104 and the current value of electromagnet coil 106 is determined according to Fig. 4 (b) and Fig. 4 (c).
In addition, because the output adopted in step S105 and the corresponding relation between high pressure and electric current would generally be true
The real output for protecting magnetron 102 is not too large with the demand power deviation being set, therefore, in step S109, to height
The regulation of pressure can adopt step-by-step movement, for example, only adjust 0.01KV every time.However, it is to be appreciated that this step-wise adjustment is
Illustrative and not restrictive, the common staff in this area can adopt stepped intervals for 0.05KV, it would however also be possible to employ first
The mode of coarse adjustment accurate adjustment section again, for example, first adopts stepped intervals for 0.05KV, then adopts stepped intervals for 0.01KV.Can be with
Understand, adjust step-size influences accuracy and speed, for example, step-length is bigger, and precision is poorer, but speed is faster.
Additionally, according to the method for the present embodiment, in different examples, S111-1 or S111-2 can also be included, point
It is not described below：
In an example of the present embodiment：
S111-1：When the amplitude slope of the corresponding signal of the real output of magnetron 102 exceedes threshold value, electricity is adjusted
The electric current of magnet coil 106 is so that the amplitude slope of the corresponding signal of the real output of magnetron 102 is in threshold range
It is interior.
The steady ripple step of step 111-1 can once or repeatedly carrying out in high voltage adjusting after reciprocal regulation process.
In another example of the present embodiment：
S111-2：When the real output of magnetron 102 reaches the demand power being set, and when magnetron 102
The corresponding signal of real output amplitude slope exceed threshold value when, regulating magnet coil 106 electric current so that magnetic
After the amplitude slope of the corresponding signal of real output of keyholed back plate 102 is in threshold range, the reality output of magnetron 102
Power and the demand power comparative result being set are inconsistent, then continue high pressure and electric magnet to high voltage modulator 104
The electric current of coil 106 is adjusted so that the real output of magnetron 102 reaches the demand power being set, and magnetic is then judged again
The amplitude slope situation of the corresponding signal of real output of keyholed back plate 102, successively iteration.
Step S111-2 can after the real output of magnetron 102 has reached the demand power being set, then
Judge the amplitude slope situation of signal.Because the output meeting after the amplitude slope situation according to signal is adjusted to electric current
Further slight change, so here is made iteratively judging until the amplitude slope of real output and its signal is accorded with
Conjunction condition.
Below, briefly narration is done in the load with reference to the magnetron to the practical application of said method.
It is well known that in linear accelerator field, magnetron as accelerating tube power source, therefore, it is necessary to being used as
The magnetron control of the power source of accelerating tube is briefly described.
As shown in Fig. 2 the magnetron 102 is coupled on accelerating tube 126 by bonder 122 and isolator 124.
Previous embodiment of the invention, can measure the output of magnetron 102 and the height of high voltage modulator 104
Relation between the magnetic field that relation between pressure, the high pressure of high voltage modulator 104 and electromagnet coil 106 are produced, electromagnetism iron wire
Relation between the electric current that circle 106 is passed through and the magnetic field that it is produced, and the output and detection electricity of the magnetron 102 of actual measurement
Relation between pressure.That is, the data of Fig. 4 (a)-Fig. 4 (d) are obtained.After these data are measured, by these data Cun Chudao storages
In device 114.
Aforementioned accelerating tube 126 for example can be resident wave accelerating pipe, the energy of linear accelerator output be by specialization,
Such as P1, therefore, the requirement to the output of magnetron 102 is exactly specialization, for example P2.The output energy of linear accelerator
Relation between P1 and the output P2 of magnetron 102 can be calculated via simulation, and this is for linear accelerator field
Those of ordinary skill be known.Can for example be manually entered into using P2 as the demand power being set of magnetron 102
Configuration interface.
The demand power P2 that control unit 118 is set according to this, in the output and height of the magnetron 102 of pre-stored
High-voltage value V1 and current value I1 is obtained in the corresponding relation of the electric current of the high pressure and electromagnet coil 106 of pressure manipulator 104, and
The electric current of the high pressure and electromagnet coil 106 that set the high voltage modulator 104 is respectively V1 and I1.
By signal gathering unit 112, the microwave envelope diagram of the reality output of magnetron 102 is collected, i.e. actual defeated
Go out the corresponding sampled signal of power P 3.
The output of demand power P2 and the memory storage of memorizer 114 that rectified signal generation unit 115 is set according to this
Power produces rectified signal corresponding with the demand power P2 being set with the relation of rectified signal (such as Fig. 4 (d)).Here, should
Rectified signal is detecting circuit signal.
By signal comparing unit 116, by the corresponding signals of real output P3 and the need being set of magnetron 102
The corresponding rectified signal of power P 2 is asked to be compared.It is assumed that signal result of the comparison shows that real output P3 is more lower slightly than P2.
The high pressure of high voltage modulator 104 is adjusted, for example, increases to V1+0.01KV, meanwhile, according to the high-voltage modulation of pre-stored
Relation (that is, Fig. 4 (b) and Fig. 4 (c)) between the high pressure of device 104 and the electric current of electromagnet coil 106, obtains electromagnet coil
106 electric current is I2.The electric current of the high pressure and electromagnet coil 106 that set the high voltage modulator 104 is respectively V1+0.01KV
And I2.
Repeat real output corresponding with the demand power being set to the collection of induction signal and real output
Signal comparison the step of, be finely adjusted again according to comparative result, so repeatedly until the corresponding signal of real output
It is consistent with the corresponding signals of demand power P2 being set.
The demand power being set is reached in the real output of magnetron 102, the reality output of magnetron 102 is detected
Whether the amplitude slope of the corresponding signal of power exceedes threshold value.If exceeding threshold value, the step of using S111-2 hereinbefore.
It is appreciated that in this applications, S111-2 can be replaced by S111-1.
Above-mentioned application, is exported by Power auto-adjustment with realizing power invariability, can be solved old due to microwave component
Change and/or the change of working environment and/or the change of operating point and/or other factors and cause the change of microwave power.
It is appreciated that in the application of first embodiment, automatic frequency controller (AFC, Automatic can be included
Frequency Controller), it is coupled between accelerating tube 126 and magnetron 102 so that the frequency of magnetron 102 with
Change with the frequency of accelerating tube 126.This application for being equipped with AFC, relative to prior art, can solve due to by frequency shadow
Stability problem that is loud and causing power change.It is this when this linear accelerator is specifically used as clinac
Using dose stability can be strengthened, to realize precisely treatment.
Another embodiment of the present invention is set forth below.Fig. 5 shows the second control of another kind of embodiment of the invention
The structural representation of component processed 200.
Specifically, second control assembly 200 includes：Magnetron 202, high voltage modulator 204, electromagnet coil 206, electricity
Magnet coil power supply 207, frequency tuning unit 208, frequency generating units 210, signal gathering unit 212, memorizer 214, inspection
Ripple signal generation unit 215, signal comparing unit 216 and control unit 218.
High voltage modulator 204 is coupled with magnetron 202, to produce high pressure.
Electromagnet coil 206 is powered by electromagnet coil power supply 207, and it is coupled with magnetron 202, to produce magnetic field.Its
Middle electromagnet coil power supply 207 can be the power supply all the way that single independent current source can also be separated for high voltage modulator 204.
This, as illustrated, the electromagnet coil power supply 207 is independent current source.
Frequency tuning unit 208 is coupled with magnetron 202, to adjust the actual output frequency of magnetron 202.
Frequency generating units 210 are used to produce signal corresponding with the setpoint frequency of magnetron 202.
Signal gathering unit 212, including frequency signal collection subelement and power signal collection subelement, and magnetron
202 couplings, wherein, frequency signal collection subelement gathers the corresponding signal of actual output frequency of magnetron 202, power signal
Collection subelement gathers the corresponding sampled signal of real output of magnetron 202.
Memorizer 214, the output of pre-stored magnetron 202 and the high pressure of high voltage modulator 204 and electromagnetism iron wire
The corresponding relation of the electric current of circle 206, the output of the magnetron 202 surveyed and the accurate corresponding relation of its rectified signal.
Rectified signal generation unit 215, for according to the output of the demand power and magnetron being set and inspection
The relation of ripple signal produces rectified signal corresponding with the demand power being set, here, rectified signal is detecting circuit signal.
Signal comparing unit 216, including frequency signal comparing subunit and power signal comparing subunit, wherein, frequency
Signal comparing subunit couples to incite somebody to action with the frequency signal collection subelement of frequency generating units 210 and signal gathering unit 212
The signal for gathering subelement collection with frequency signal from the signal of frequency generating units 210 is compared；Power signal compares
Subelement couples to incite somebody to action respectively with the power signal collection subelement and rectified signal generation unit 215 of signal gathering unit 212
The rectified signal that the sampled signal for gathering subelement from power signal is produced with rectified signal generation unit 215 is compared.
Control unit 218, including Power Control subelement and FREQUENCY CONTROL subelement.Wherein, Power Control subelement with
The power signal comparing subunit of high voltage modulator 204, electromagnet coil 206, memorizer 214 and signal comparing unit 216 point
Do not couple, when its receive magnetron 202 be set demand power when, set according to the corresponding relation of the pre-stored of memorizer 214
Determine the high pressure of high voltage modulator 204 and the electric current of electromagnet coil 206, and according to the power signal of signal comparing unit 216
The result of comparing subunit is adjusted such that magnetron to the high pressure of high voltage modulator 204 and the electric current of electromagnet coil 206
202 output is consistent with the demand power being set.The FREQUENCY CONTROL subelement of control unit 218 and signal comparing unit
216 frequency signal comparing subunit and frequency tuning unit 208 are coupled respectively, when it receives being set for magnetron 202
Operating frequency when, by the comparative result of the frequency signal comparing subunit of the signal comparing unit 216 to the frequency
Tuned cell 208 is adjusted such that the output frequency of the magnetron 202 is consistent with setpoint frequency.
Second control assembly 200 also includes configuration interface 219, to be input into configuration parameter, wherein, the configuration parameter includes
Frequency and power parameter.
In short, second control assembly 200 in the present embodiment is except including in previously described one embodiment
All elements outside also include FREQUENCY CONTROL part.It should be appreciated that in this embodiment, unit related to Power Control part
It is identical that part (although reference is different) plays a part of with one embodiment, for example, the work(of signal gathering unit 212
The Power Control of rate signals collecting subelement, the power signal comparing subunit of signal comparing unit 216 and control unit 218
Subelement etc..Hereafter mainly to being related to the narration of FREQUENCY CONTROL some importance, and to Power Control part, can be with reference to first reality
Apply example to understand the present embodiment.
Specifically, frequency tuning unit 208 can include motor and the tuning plug being motor driven, wherein, tuning plug
One end couples with the cavity of magnetron 202.So, by the reciprocating motion of Motor drive tuning plug, magnetron 202 can be adjusted
Frequency.It will appreciated by the skilled person that frequency tuning unit 208 can have other various ways, here, not doing
Any restriction.
Frequency generating units 210 can be local oscillator crystal or field programmable gate array (FPGA).
According to the second embodiment, its method at least include S201-S207 the step of, each step is given in detail separately below
State.
S201：Receive the demand power being set and demand frequency of magnetron 202.
It is slightly different with first embodiment, there should be the option of output frequency on configuration interface.
S203：Demand power and the output of memory storage and inspection that rectified signal generation unit is set
Relation between ripple signal produces rectified signal.
S205：According to the output of magnetron 202 and the high pressure of high voltage modulator 204 and electromagnetism iron wire of pre-stored
The high pressure and the electric current of electromagnet coil 206 of the corresponding relation setting high voltage modulator 204 of the electric current of circle 206.
S207：By the detection corresponding with the demand power being set of the corresponding signal of the real output of magnetron 202
Signal is compared, and signal corresponding with setpoint frequency signal corresponding with the actual output frequency of magnetron 202 is carried out
Relatively.
S209：High pressure and electromagnet coil if power signal comparative result is inconsistent, to high voltage modulator 204
206 electric current is adjusted so that the real output of magnetron 202 reaches the demand power being set；And if frequency signal ratio
Relatively result is inconsistent, then the reality output frequency of magnetron 202 is adjusted by being coupled to the frequency tuning unit of magnetron 202
It is blunt to setting demand frequency it is consistent.
In step S209, during output is adjusted, in fact, output frequency also can change therewith,
Meanwhile, during output frequency is adjusted, output also can change therewith, can combine accompanying drawing 7 and be understood.That is,
The two regulation processes are interactional.This regulation process is different from one embodiment, because in first reality
In applying example, as long as the output of magnetron meets the requirements.
In the present embodiment, the steady ripple step described in detail in one embodiment can be included.
Below, briefly narration is done in the load with reference to the magnetron 202 to the practical application of the method for second embodiment.
It is well known that in linear accelerator field, magnetron as accelerating tube power source, therefore, it is necessary to being used as
The control of the magnetron of the power source of accelerating tube is briefly described.
As shown in figure 5, the magnetron 202 is coupled on accelerating tube 224 by bonder 220 and isolator 222, wherein,
The accelerating tube 224 is the accelerating tube in the work of fixed frequency f1.
According to the second embodiment of the present invention, the output of magnetron 202 and the height of high voltage modulator 204 can be measured
Relation between the magnetic field that relation between pressure, the high pressure of high voltage modulator 204 and electromagnet coil 206 are produced, electromagnetism iron wire
Relation between the electric current that circle 206 is passed through and the magnetic field that it is produced, and between the output and detecting circuit of magnetron 202
Relation.That is, the data of Fig. 4 (a)-Fig. 4 (d) are obtained.After these data are measured, by these data Cun Chudao memorizeies 214
It is interior.
Aforementioned accelerating tube 224 can be for example the resident wave accelerating pipe of fixed frequency f1, and linear accelerator output
Energy be also by specialization, such as P1, therefore, the requirement to the output of magnetron 202 is exactly specialization, for example P2.
Relation of the output of linear accelerator between energy P1 and the output P2 of magnetron 202 can be calculated via simulation,
This is known for the those of ordinary skill in linear accelerator field.Can be using f1 and P2 as the quilt of magnetron 202
The demand frequency of setting and demand power, for example, be manually entered into configuration interface.
Frequency generating units 210 produce signal corresponding thereto according to demand frequency f1 being set of magnetron 202；
The demand power P2 that control unit 218 is set according to this, in the output and height of the magnetron 202 of pre-stored
Corresponding high-voltage value V1 and electric current are obtained in the corresponding relation of the electric current of the high pressure and electromagnet coil 206 of pressure manipulator 204
Value I1, and the electric current of the high pressure and electromagnet coil 206 for setting the high voltage modulator 204 is respectively V1 and I1.
Output of the rectified signal generation unit 215 according to the magnetron 202 of the demand power P2 and pre-stored being set
Power detecting circuit signal corresponding with the generation of the relation of detecting circuit.
By signal gathering unit 212, the microwave envelope diagram of the reality output of magnetron 202 is collected, i.e. actual defeated
Go out the corresponding sampled signal of power P 3.
By signal comparing unit 216, by the corresponding signals of real output P3 and the need being set of magnetron 202
The corresponding rectified signal of power P 2 is asked to be compared.It is assumed that signal result of the comparison shows that real output P3 is more lower slightly than P2.
Adjust the high pressure of high voltage modulator 204, it is assumed that to V1+0.01KV, meanwhile, according to the high voltage modulator of pre-stored
Relation between 204 high pressure and the electric current of electromagnet coil 206, the electric current for obtaining electromagnet coil 206 is I2.Setting is described
The high pressure of high voltage modulator 204 and the electric current of electromagnet coil 206 are respectively V1+0.01KV and I2.
Repeat real output to the collection of induction signal and the corresponding sampled signal of real output be set
Corresponding signals of demand power P2 the step of compare, be finely adjusted again according to comparative result, so repeatedly until reality output
The corresponding signal of power is consistent with the corresponding signals of demand power P2 being set.
In above process, following process is carried out all the time：The reality of magnetron 202 is gathered by signal gathering unit 212
The high-frequency signal of output obtains actual output frequency；Again by signal comparing unit 216, by the reality output frequency of magnetron 202
The corresponding signal of rate is produced with frequency generating units signal corresponding with demand frequency that is being set is compared；Then, root
According to comparative result, the output frequency that frequency tuning unit 208 adjusts magnetron 202 is consistent with the demand frequency being set.
The demand power being set is reached in the real output of magnetron 202, the reality output of magnetron 202 is detected
Whether the amplitude slope of the corresponding signal of power exceedes threshold value.If exceeding threshold value, the step of using S111-2 hereinbefore.
It is understandable that：From in terms of each specific regulating step, the regulation of output may bring output frequency
Slight change, vice versa.For example, when the electric current of the high pressure of high voltage modulator 204 and electromagnet coil 206 is respectively set as
During V1+0.01KV and I2, while output is slightly improved, output frequency also may slightly improve, referring to Fig. 7, and
While output frequency is adjusted to into setpoint frequency by frequency adjustment portion, output also may be improved slightly.
It is appreciated that the aforementioned accelerating tube as load can be replacement.And, control assembly 200 can realize work(
The constant output of rate and frequency.Especially when accelerating tube possesses accurately temperature control system, the control assembly 200 not only can fill
Can detect when its stable power source and easily the quality of accelerating tube and temperature control system.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, without departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (14)
1. a kind of power and Frequency Control Module, including：
Magnetron；
High voltage modulator, couples with the magnetron, to produce high pressure；
Electromagnet coil, couples with the magnetron, to produce magnetic field；
Frequency tuning unit, couples with the magnetron, to adjust the actual output frequency of the magnetron；
Frequency generating units, produce signal corresponding with the demand frequency being set of the magnetron；
Signal gathering unit, couples with the magnetron, to gather the actual output frequency and reality output of the magnetron
The corresponding sampled signal of power；
Memorizer, the high pressure and the electromagnet coil of the output of magnetron described in pre-stored and the high voltage modulator
Electric current corresponding relation, the output of the magnetron and its corresponding rectified signal relation；
Rectified signal generation unit, according to the demand power being set and the output of the magnetron of the magnetron
Rectified signal corresponding with the demand power being set is produced with the corresponding relation of rectified signal；
Signal comparing unit, couples respectively with the frequency generating units, the signal gathering unit and the memorizer, will
It is compared from the signal of frequency generating units signal corresponding with the output frequency that the signal gathering unit is gathered,
And will produce with the rectified signal generation unit from the corresponding sampled signal of the output of the signal gathering unit
Rectified signal be compared；
Control unit, adjusts with the high voltage modulator, the electromagnet coil, memorizer, the signal comparing unit and frequency
Humorous unit is coupled respectively, when its receive the magnetron be set demand power when, according to the memorizer pre-stored
Corresponding relation sets the high pressure of the high voltage modulator and the electric current of the electromagnet coil, and more single according to the signal
The result of unit is adjusted such that the magnetron to the high pressure of the high voltage modulator and the electric current of the electromagnet coil
Output reaches the demand power being set；And when its receive the magnetron be set demand frequency when, according to
The result of the signal comparing unit is adjusted such that the output frequency of the magnetron reaches to the frequency tuning unit
The demand frequency being set.
2. power according to claim 1 and Frequency Control Module, wherein, described control unit also includes steady marble list
Unit, it is coupled with the signal gathering unit and the electromagnet coil, for when the reality of signal gathering unit collection
Output adjusts the electric current of the electromagnet coil so that the reality output when exceeding threshold value to the amplitude slope of induction signal
Power is to the amplitude slope of induction signal in threshold range.
3. power according to claim 1 and Frequency Control Module, wherein, the control assembly also includes configuration interface,
The configuration interface is used to be input into the demand power being set and demand frequency of the magnetron.
4. power according to claim 1 and Frequency Control Module, wherein, the frequency generating units include local oscillator crystal
Or field programmable gate array (FPGA).
5. power according to claim 1 and Frequency Control Module, wherein, the signal comparing unit compares including frequency
Device and power comparator, wherein, the frequency comparator is for frequency generating units generation and the demand frequency being set
The comparison of the corresponding signal of rate signal corresponding with the actual output frequency that the signal gathering unit is gathered, the power ratio compared with
Device is used for the corresponding sampled signal of real output of the signal gathering unit and produces with the rectified signal generation unit
Rectified signal comparison.
6. a kind of linear accelerating device assembly, including accelerating tube and power and Frequency Control Module, the power and FREQUENCY CONTROL
Component as described in any one of claim 1-5, wherein, the magnetron of the power and Frequency Control Module and the accelerating tube coupling
Close, wherein, the accelerating tube is the accelerating tube of fixed frequency.
7. a kind of control magnetron is to setting power and the method for setpoint frequency, including：
Receive the demand power being set and demand frequency of the magnetron；
Produce rectified signal corresponding with the demand power being set；
According to the output of the magnetron and the high pressure of the high voltage modulator and the electromagnet coil of pre-stored
The corresponding relation of electric current set the high pressure of the high voltage modulator and the electric current of the electromagnet coil；
By the detection corresponding with the demand power being set of the corresponding sampled signal of the real output of the magnetron
Signal is compared, and the corresponding signal of demand frequency of the setting is corresponding with the actual output frequency of the magnetron
Signal be compared；
If power signal comparative result is inconsistent, the electricity of high pressure and the electromagnet coil to the high voltage modulator
Stream is adjusted so that the real output of the magnetron reaches the demand power being set；If simultaneously frequency signal compares
As a result it is inconsistent, then the reality output frequency of the magnetron is adjusted by being coupled to the frequency tuning unit of the magnetron
It is blunt to consistent with the demand frequency being set.
8. method according to claim 7, wherein, when the amplitude to induction signal of the real output of the magnetron
When slope exceedes threshold value, the electric current of the electromagnet coil is adjusted so that the amplitude to induction signal of the real output is oblique
Rate is in threshold range.
9. method according to claim 7, wherein, also include：
When the real output of the magnetron reaches the demand power being set, and when the reality of the magnetron is defeated
When the amplitude slope to induction signal for going out power exceedes threshold value, the electric current of the electromagnet coil is adjusted so that the reality output
The amplitude slope to induction signal of power is in threshold range；
Determine whether whether power signal comparative result is consistent, if inconsistent, continues the high pressure to the high voltage modulator
Adjust with the electric current of the electromagnet coil so that the real output of the magnetron reaches the demand power being set.
10. the method according to any one of claim 7-9, wherein, in the high voltage adjusting to the high voltage modulator so that
It is described to be adjusted to what is gradually finely tuned in the step of output of the magnetron reaches the demand power being set.
11. methods according to claim 7, wherein, it is described receiving when the accelerating tube is used as the load of magnetron
Magnetron be set demand frequency the step of in, the demand frequency being set depend on the magnetron coupling tool
There is the accelerating tube of fixed frequency.
12. methods according to claim 7, wherein, the corresponding sampling of the real output by the magnetron
It is described with the demand power pair that is set in the step of signal rectified signal corresponding with the demand power being set is compared
The rectified signal relation answered is by obtained from measurement standard power source.
13. methods according to claim 7, wherein, the signal corresponding with the output frequency of the setting is by this
Shake what crystal or field programmable gate array (FPGA) were produced.
14. methods according to claim 7, wherein, the demand power being set for receiving the magnetron and need
The step of seeking frequency is carried out by configuration interface.
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Address after: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |