CN208607357U - Based on numerically controlled intelligent auto frequency control apparatus - Google Patents
Based on numerically controlled intelligent auto frequency control apparatus Download PDFInfo
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- CN208607357U CN208607357U CN201821099130.5U CN201821099130U CN208607357U CN 208607357 U CN208607357 U CN 208607357U CN 201821099130 U CN201821099130 U CN 201821099130U CN 208607357 U CN208607357 U CN 208607357U
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Abstract
The utility model discloses one kind based on numerically controlled intelligent auto frequency control apparatus, it include: phase shift block, it is connected with the first signal input part, and it is configured as receiving incidence wave from the first signal input part, phase shift is carried out to generate phase shift signal to incidence wave according to phase shift parameters, and exports phase shift signal to phase demodulation module；And phase demodulation module, it is connected with phase shift block and second signal input terminal, and be configured as receiving back wave from second signal input terminal, phase demodulation is carried out to generate phase difference signal to phase shift signal and back wave, and export phase difference signal via control interface.
Description
Technical field
This disclosure relates to which automatic frequency control field, is based on the automatic frequency of numerically controlled intelligence more particularly, to one kind
Rate controls equipment.
Background technique
Automatic frequency controls (Automatic Frequency Control, hereinafter referred to as AFC), also referred to as automatic micro-
It adjusts (Automatic Frequency Tuner, hereinafter referred to as AFT), is a kind of microwave signal for exporting microwave source
Frequency and target frequency keep certain to determine the automatic control system of relationship.
AFC system is mainly used to keep the frequency of receiver on set point, it is ensured that correct in radar equipment system
Receive the feedback signal of radar.Phase early 1950s starts for frequency modulation communication receiver, to improve anti-interference energy
Power is also used to frequency modulation transmitter and other electronic equipments for radar receiver to realize frequency trim, to improve the steady of system
Fixed degree.
In the electronic line of sight traveling waves of the purposes such as modern medical service, industry, standing wave accelerator etc., AFC system often uses base
In the automatic frequency control system of microwave signal process, for guaranteeing the frequency of microwave power source output microwave and the work of accelerating tube
Working frequency point is mutually matched, and is guaranteed the stability of indices after system operation, is improved anti-interference ability.
The automatic frequency control system applied in electronic line of sight standing wave accelerator is divided into following from basic principle
Three kinds of modes: highest dose value controls formula, back wave minimum discrimination method and frequency discrimination type method.Formula is controlled in highest dose value
In, by the value of the dosage rate of real-time tracking accelerator system, control signal is obtained by feedback signal, makes the agent of whole system
Dose rate maintains on maximum point.It because measuring signal is an extremely small and weak current signal, and measures, in high pressure, forceful electric power, strong
In the adverse circumstances such as magnetic field, strong electromagnetic, it is difficult to ensure that the stability and accuracy of system.Such method pause stays in theory
Stage.In back wave minimum discrimination method, by tracking the variation of the reflected microwave power signal of accelerating tube, next life
At control signal, to control the frequency of the microwave source in accelerator system.Come guarantee whole system dosage output etc. indexs
Stability.In frequency discrimination type method, certain microwave signal characteristics of the demand by identifying the microwave and accelerating tube that input
Consistency reaches the target of the stability of indexs such as the dosage output of whole system to obtain the signal of control microwave source.Generally
There are four types of the frequency control systems of form: crystal oscillator type, single-chamber type, dual-chamber type, locking phase type.
Crystal oscillator type frequency control system is the scheme used in early stage accelerator system, it is with the output frequency of a crystal oscillator
Output frequency as microwave source controls signal criterion, but the disadvantage is that can only be by the frequency stabilization of microwave power source in a spy
On fixed point, can not the working frequency according to caused by accelerating tube temperature change variation, in real time dynamic adjust microwave source frequency, be
System is constantly in optimum state.
Single-chamber type frequency control system uses a resonant cavity, and is passed through after resonant cavity using the microwave signal of different frequency
The different feature of output signal, to achieve the purpose that locking frequency.Because cavity is communicated with system water route, make the signal of cavity generation
Variation is with accelerating tube because frequency variation variation caused by temperature has certain correlation.But because, cavity machining accuracy, sensitivity
The problems such as not high, its frequency control ability was insufficient.
Dual-chamber type frequency control system uses two resonant cavities, and frequency is respectively f+ Δ f and f- Δ f.System will sample wave
The microwave signal led motivates two resonant cavities.After separately sampled, two signals of acquisition are straight by peak sample circuit conversion
Galvanic electricity is flat, obtains the driving signal for changing microwave source frequency using difference amplifier.The system has with respect to single-chamber type
Good frequency changes tracking characteristics.Higher system stability can be obtained.But its following range is limited, can not adapt to larger
The emergency case of variation.
The phase that locking phase type frequency control system (being also indirect type frequency discrimination AFC system) passes through identification incidence wave and back wave
The variation of difference generates corresponding microwave source control signal, caused by the frequency shift (FS) for compensating each microwave signal as feedback signal
Frequency point difference, thus quickly, precisely, the microwave source of accurate control system.After succeeding in developing from 1970s, by state
Inside and outside most of standing wave accelerator systems are used.
From cardinal principle, using phase-locking type frequency discrimination AFC system there are performances it is stable, reaction speed is fast the features such as,
It is a kind of most common system schema for traditional standing wave linac.As can be seen that existing AFC from parts selection
Control system is more using analogue microwave signal processing system, all using the side of mechanical rotation on attenuator, phase shifter
Formula, can not precise positioning, device consistency is poor.And microwave device is mostly close to the microwave source system of accelerator and ray generator
Part.Commissioning staff needs to close ray system repeatedly when operating, and commutes safety and ray control area, debugging effect
All there are some problems in rate and safety.
Summary of the invention
In view of this, an aspect of this disclosure provides one kind for intelligence AFC equipment, comprising:
Phase shift block is connected with the first signal input part, and is configured as receiving incidence wave, root from the first signal input part
Phase shift is carried out to generate phase shift signal to incidence wave according to phase shift parameters, and exports phase shift signal to phase demodulation module；And
Phase demodulation module is connected with phase shift block and second signal input terminal, and is configured as inputting from second signal and terminate
Back wave is received, phase demodulation is carried out to generate phase difference signal to phase shift signal and back wave, and export phase difference signal via control interface.
According to the embodiment of the present disclosure, phase shift parameters are digital controlled signals.
According to the embodiment of the present disclosure, incidence wave is to be generated by microwave source, and back wave is that incidence wave is straight via electronics
The reflection of line accelerating tube generates.
According to the embodiment of the present disclosure, phase shift block includes:
Digital phase shifter is connected with the first signal input part, and is configured as receiving incidence wave from the first signal input part,
Phase shift is carried out to incidence wave to generate the first phase shift signal according to phase shift parameters, and exports the first phase shift letter to first filter
Number；
First filter is connected with digital phase shifter, and is configured as being filtered the first phase shift signal to generate
One filtering signal, and the first filtering signal is exported to the first attenuator；
First attenuator, is connected with first filter, and is configured as decaying to the first filtering signal to generate
One deamplification, and the first deamplification is exported to second filter；And
Second filter is connected with the first attenuator, and is configured as being filtered the first deamplification to generate
Two filtering signals, and the second filtering signal is exported as phase shift signal to phase demodulation module.
According to the embodiment of the present disclosure, phase shift block further includes digital switch, is connected to first filter and the first attenuator
Between.
According to the embodiment of the present disclosure, phase demodulation module includes: electric bridge, is connected with second filter and second signal input terminal,
And be configured as receiving back wave from second signal input terminal, phase demodulation is carried out to phase shift signal and back wave to generate difference letter
Number, and phase difference signal is exported via control interface.
According to the embodiment of the present disclosure, intelligent AFC equipment further include:
First amplitude control module is connected with the first signal input part, and is configured as receiving from the first signal input part
Incidence wave is adjusted according to amplitude of the first amplitude adjusting parameter to incidence wave, and to entering after phase shift block output adjustment
Ejected wave.
According to the embodiment of the present disclosure, first amplitude adjusting parameter is digital controlled signal.
According to the embodiment of the present disclosure, first amplitude control module includes:
Second attenuator is connected with the first signal input part, and is configured as receiving incidence wave from the first signal input part,
Decay to incidence wave to generate the second deamplification, and export the second deamplification to limiter；
Limiter is connected with the second attenuator, and is configured as carrying out clipping to the second deamplification to generate clipping letter
Number, and to third attenuator output violent change signal；And
Third attenuator, is connected with limiter, and is configured as carrying out limitation signal further decaying to generate third
Deamplification, and third deamplification is exported to phase shift block.
According to the embodiment of the present disclosure, third attenuator includes digital variable attenuator and fixed value attenuator, wherein
Digital variable attenuator is connected with limiter, and it is interim to generate first to be configured as decaying to limitation signal
Deamplification, and the first interim deamplification is exported to fixed value attenuator；And
Fixed value attenuator is connected with digital variable attenuator, and is configured as decaying to the first interim deamplification
To generate the second interim deamplification, and the second interim deamplification is exported to phase shift block.
According to the embodiment of the present disclosure, the second attenuator is fixed value attenuator.
According to the embodiment of the present disclosure, intelligent AFC equipment further include:
Second amplitude control module, is connected with second signal input terminal, and is configured as receiving from second signal input terminal
Back wave is adjusted according to amplitude of second amplitude-adjustment parameters to back wave, and to anti-after phase demodulation module output adjustment
Ejected wave.
According to the embodiment of the present disclosure, the second amplitude-adjustment parameters are digital controlled signals.
According to the embodiment of the present disclosure, the second amplitude control module includes:
4th attenuator is connected with second signal input terminal, and is configured as receiving back wave from second signal input terminal,
Decay to back wave to generate the 4th deamplification, and export the 4th deamplification to third filter；And
Third filter is connected with the 4th attenuator, and is configured as being filtered the 4th deamplification to generate
Three filtering signals, and third filtering signal is exported to phase demodulation module.
According to the embodiment of the present disclosure, the 4th attenuator includes:
Fixed value attenuator is connected with second signal input terminal, and is configured as decaying to back wave to generate
Three interim deamplifications, and the interim deamplification of third is exported to digital variable attenuator；
Digital variable attenuator is connected with fixed value attenuator, and is configured as declining to the interim deamplification of third
Subtract to generate the 4th interim deamplification, and export the 4th interim deamplification to the second fixed value attenuator；And
Second fixed value attenuator, is connected with digital variable attenuator, and be configured as to the 4th interim deamplification into
Row further decays to generate the 5th interim deamplification, and exports the 5th interim deamplification to third filter.
According to the embodiment of the present disclosure, electric bridge is connected with second filter and third filter, and is configured as believing phase shift
Number and third filtering signal carry out phase demodulation to generate phase difference signal, and export phase difference signal via control interface.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present disclosure, the above-mentioned and other purposes of the disclosure, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 a shows the structure chart of locking phase type AFC system according to prior art；
Fig. 1 b shows the structure chart of the phase discriminator in locking phase type AFC system shown in Fig. 1 a according to prior art；
Fig. 2 shows the structure charts according to the intelligent AFC system of the embodiment of the present disclosure；
Fig. 3 shows intelligent AFC equipment in the intelligent AFC system shown in Fig. 2 according to the embodiment of the present disclosure, long-range
The structure chart of control system and frequency control apparatus；And
Fig. 4 a to Fig. 4 c diagrammatically illustrates each in the intelligence AFC equipment according to shown in Fig. 3 of the embodiment of the present disclosure
The structure chart of a module.
Specific embodiment
Hereinafter, will be described with reference to the accompanying drawings embodiment of the disclosure.However, it should be understood that these descriptions are only exemplary
, and it is not intended to limit the scope of the present disclosure.In addition, in the following description, descriptions of well-known structures and technologies are omitted, with
Avoid unnecessarily obscuring the concept of the disclosure.
Term as used herein is not intended to limit the disclosure just for the sake of description specific embodiment.Used here as
Word " one ", " one (kind) " and "the" etc. also should include " multiple ", " a variety of " the meaning, unless in addition context clearly refers to
Out.In addition, the terms "include", "comprise" as used herein etc. show the presence of feature, step, operation and/or component, still
Presence is not precluded or adds other one or more features, step, operation or component.
There are all terms (including technical and scientific term) as used herein those skilled in the art to be generally understood
Meaning, unless otherwise defined.It should be noted that term used herein should be interpreted that with consistent with the context of this specification
Meaning, without that should be explained with idealization or excessively mechanical mode.
Fig. 1 a shows the structure chart of locking phase type AFC system according to prior art.Locking phase type AFC system is mainly by phase demodulation
Device 100, preamplifier 110 and servo amplifier 120 form.Incidence wave and back wave are input to phase discriminator 100.Incidence wave
It is by obtaining the microwave being fed into inside resident wave accelerating pipe letter between magnetron and isolator (or between accelerating tube and isolator)
Number and be sampled the electric signal of acquisition to microwave signal, and back wave is by (or accelerating between heavy load and isolator
Between pipe and isolator) it obtains the reflected microwave signal of resident wave accelerating pipe and is sampled the telecommunications of acquisition to the microwave signal
Number.Phase discriminator 100 is come by carrying out the operations such as range-adjusting, phase shift, superposition vector calculating to incidence wave and back wave in time domain
Phase transition is carried out to incidence wave and radioactive wave, to obtain two microwave signals with vector sum and phasor difference, then to this
Two microwave signals are sampled acquisition electric signal.
Fig. 1 b shows the structure chart of the phase discriminator 100 in locking phase type AFC system shown in Fig. 1 a according to prior art.
Phase discriminator 100 is mainly by delay line 1001, variable attenuator 1002,1003, phase shifter 1004, mixing ring 1005 and wave detector
1006 and 1007 compositions.
In common accelerator system, phase shifter, mixing ring and wave detector are usually integrated to form one
AFT unit, such as the AFT unit of AFT microwave company, Germany manufacture.AFT unit is moved by technological incorporation such as micro-strips
The integrated device of the comprehensive functions such as phase device, mixing ring, detection crystal.Phase shift adjusting knob uses mechanical adjustment, sometimes may be used
To carry out automatically controlled adjusting using direct current generator.
Core devices in AFC system further include variable attenuator, phase shifter, mixing ring and detection crystal.
Variable attenuator mainly by the amplitude attenuation of Microwave Sampling signal to certain amplitude, consequently facilitating rear end again into
Row calculates and processing.In existing product, the main Types of variable attenuator have mechanical continuous variable attenuator, mechanical
Stepping variable attenuator, digital variable attenuator and voltage type variable attenuator.In existing AFC system through frequently with
Mechanical continuous variable attenuator.
Phase shifter keeps amplitude and signal detail constant by the movement in microwave signal progress time, phase, and as far as possible.It moves
Phase device includes mechanical phase shifter, generallys use the phase that knob carrys out Serial regulation phase shift；And digital phase shifter, usually
Using long number control come the phase of step by step modulating phase shift.
Mixing ring (also referred to as Microwave Hybrid ring) is carried out two way microwave signals by microstrip structure and microwave transmission characteristic
Phasor difference and vector sum calculate, to obtain the new microwave signal of two-way.
Detection crystal is the detection device that the microwave signal of pulse is converted to electric signal.
Fig. 2 shows the structure charts according to the intelligent AFC system of the embodiment of the present disclosure.Intelligent AFC system may include micro-
Wave source 210, waveguide transmission system 220, electronic linear accelerating tube 230, intelligence AFC equipment 240, tele-control system 250 and frequency
Rate control device 260.
Microwave source 210 is the device that pulsed microwave power is generated using high voltage pulse power.It is led in electron linear accelerator
Domain, microwave source 210 are usually realized by magnetron, klystron etc..Microwave source 210 can produce microwave signal.Microwave source 210 1
As have in a certain range adjust output microwave signal frequency ability.The regulative mode of the frequency of microwave signal usually wraps
Include the methods of mechanical rotation, electric pulse stepping, digital regulated excitation source frequency.
Waveguide transmission system 220 can be by the microwave signal transmission to electronic linear accelerating tube 230 and intelligence AFC equipment.
When waveguide transmission system 220 by the microwave signal transmission to electronic linear accelerating tube 230 when, in electronic linear accelerating tube 230
It can produce accelerating field.A part of accelerating field is reflected back waveguide transmission system 220.In isolator front end or accelerating tube
It is sampled at microwave introducing port with directional coupler and obtains incidence wave signal, by sampling waveguide, to microwave signal at incidence wave
Sampling obtains incidence wave electric signal, and directional couple is used at the absorbing load of isolator or at the microwave introducing port of accelerating tube
Device is oriented sampling to back wave, obtains back wave electric signal.Waveguide transmission system 220 can be by the reflective wave transmission to intelligence
It can AFC equipment 240.
Intelligent AFC equipment 240 can generate phase difference signal according to the incidence wave of input and back wave, and by the difference
Signal is output to tele-control system 250.Tele-control system 250 can be by the phase difference signal of input and preset phase difference signal
It is compared to generate adjustment signal, and the adjustment signal is transferred to frequency control apparatus 260.Frequency control apparatus 260
Power amplification processing can be carried out to the adjustment signal of input to generate frequency tuning control signal, and by the frequency tuning control
Signal processed is transferred to microwave source 210.Microwave source 210 can change generated microwave signal according to frequency tuning control signal
Frequency.Microwave source 210 can change the frequency of microwave signal by way of number or by way of mechanical adjustment.For
The frequency of adjustment microwave signal, microwave source is generally using machinery rotational structure come the frequency of Serial regulation microwave signal, such as magnetic
The frequency adjustment mechanism of keyholed back plate, some microwave sources use the amplification principle of driving source formula, as klystron microwave source uses driving source
Carry out driving frequency, which is controlled the microwave frequency of output by digital signal or voltage analog signal control.In addition, microwave
Source 210 can also generate according to frequency tuning control signal and adjust threshold feedback signal, and by the adjusting threshold feedback signal
It is transmitted back to frequency control apparatus 260.
Entire intelligent AFC system forms closed-loop control as a result, realizes automatically tracking for microwave.Tele-control system
The Mechanical course of traditional design is become into digital controlled signal by control program, change microwave signal is distally can be achieved with and declines
The digital processing of depreciation, the phase controlling of signal and signal.PLC or circuit system can also be used, the mould of controllable voltage is provided
Quasi- signal, realizes the control of signal.
Next, with reference to Fig. 3 detailed description according to the intelligence in the intelligent AFC system shown in Fig. 2 of the embodiment of the present disclosure
The structure chart of energy AFC equipment 240, tele-control system 250 and frequency control apparatus 260.
Intelligent AFC equipment 240 may include phase shift block 2410 and phase demodulation module 2420.Phase shift block 2410 can be with
One signal input part is connected, and can be configured as from the first signal input part and receive incidence wave, according to via control interface
2450 carry out phase shift to incidence wave from the received phase shift parameters of tele-control system 250 to generate phase shift signal, and to phase demodulation mould
Block 2420 exports phase shift signal.Phase shift parameters generally use the analog signal of rad/mV, certainly, 12bit or 16bit can also be used
Etc. long numbers digital controlled signal.Phase demodulation module 2420 can be connected with phase shift block 2410 and second signal input terminal, and
And can be configured as from second signal input terminal and receive back wave, phase demodulation is carried out to generate difference to phase shift signal and back wave
Signal, and phase difference signal is exported to tele-control system 250 via control interface 2450.Here, incidence wave can be by microwave
What source generated, and back wave can be what incidence wave was generated via electronic linear accelerating tube reflection.Phase demodulation module 2420 can also
With after being realized with high-frequency frequency compounding chip or being divided to signal with the digital phase detection chip of lower frequency come real
It is existing.
Here the case where phase shift is carried out to incidence wave is only described, according to specific implementation, in addition to carrying out to incidence wave
Except phase shift, phase shift can also be carried out to back wave, that is, by the way of multichannel phase shift, Lai Jinhang phase adjustment, thus after making
The phase demodulation module at end is available or works on best operating point.
Intelligent AFC equipment 240 can also selectively include that first amplitude control module 2430 and the second amplitude control mould
Block 2440, this depends on the implementation of phase shift block 2410 and phase demodulation module 2420.When the wide cut of phase shift block 2410
When being worth IC chip realization, intelligent AFC equipment 240 can not include first amplitude control module 2430.When phase demodulation module 2420 is adopted
When with being realized with wide cut value IC chip, intelligent AFC equipment 240 can not include the second amplitude control module 2440.First amplitude
Control module 2430 can be connected with the first signal input part, and be configured as receiving incidence wave, root from the first signal input part
The amplitude of incidence wave is adjusted from the received first amplitude adjusting parameter of tele-control system 250 according to via control interface 2450
It is whole, and to the incidence wave after 2410 output adjustment of phase shift block.Second amplitude control module 2440 can be inputted with second signal
End is connected, and is configured as receiving back wave from second signal input terminal, controls system from long-range according to via control interface 2450
250 received second amplitude-adjustment parameters of uniting are adjusted the amplitude of back wave, and to after 2420 output adjustment of phase demodulation module
Back wave.Here, first amplitude adjusting parameter can be equal to the second amplitude-adjustment parameters, and first amplitude adjusting parameter and
Second amplitude-adjustment parameters can be digital-to-analog control signal.Control interface 2450 can use dedicated MCU monolithic
Serial ports controller can also be used in machine, will control the control signal transmitting after signal digitizes between carry out system；PLC can also be used
PROFINET agreement or the mode of cable transmit control signal；Some or all of voltage analog signal can also be used,
Guarantee system stability.
Tele-control system 250 may include memory 2510, control module 2520, man-machine interface 2530 and control interface
2540.Memory 2510 stores the status signal of digit chip, such as first amplitude adjusting parameter, the second amplitude-adjustment parameters, phase
Shifting parameter initially differs thermal compensation signal, initial position signal, preset phase difference signal etc..It can be by because of temperature, beam intensity
Etc. the variation of the best microwave frequency point of external conditions bring system write for responding feedback signal, making logical action, connect
The program of the movements such as controllers signal, system investment/pause is received, and program is stored in control module 2520.The program
Compiling procedure can be realized, can realize on the FPGA remotely controlled or can be realized on the PLC remotely controlled at the end PC.
Control module 2520 can be connected with memory 2510, and can be configured as via control interface 2540 from phase demodulation module
2420 receive phase difference signal, and the preset phase difference signal stored in the phase difference signal received and memory 2510 is compared,
Adjustment signal is generated according to comparison result, and the adjustment signal is transferred to frequency control apparatus 260.Control interface 2540 can
To use dedicated MCU single-chip microcontroller, serial ports controller can also be used, the control signal after signal digitizes between carry out system will be controlled
Transmitting；The mode of PROFINET agreement or cable that PLC can also be used transmits control signal；It some or all of can also adopt
With voltage analog signal, guarantee system stability.Man-machine interface 2530 can be connected with memory 2510 and control module 2520,
And it can be configured as through modes such as picture and text, text, marks in remote control terminals such as display screen, touch screen, button interfaces
To operator's display systems state, the system command for receiving operator etc..It should be noted that can also be by control module 2520
It is realized in frequency control apparatus 260 with control interface 2540, and realizes typing and the shape of control signal by the end PC/PLC
The feedback of state.
Frequency control apparatus 260 may include power amplification circuit 2610 and protective module 2620.Power amplification circuit
2610 receive adjustment signal, and carry out power amplification to adjustment signal to generate frequency tuning control signal.In order to make power
Amplifying circuit 2610 can convert phase difference signal in the driving signal for being used to that mechanical structure to be made to act or voltage control letter
Number, power amplification circuit 2610 also requires connect to driving power (for example, DC/AC power supply).Protective module 2620 can be from micro-
Wave source 210, which receives, adjusts threshold feedback signal.Adjust threshold feedback signal may include whether indicating frequency tuning control signal
Have exceeded the disconnection indication signal of the adjustable extent for microwave source 210.Protective module 2620 can be indicated according to the disconnection
Signal determines whether that cut-off signal should be sent to power amplification circuit 2610, so that power amplification circuit 2610 is no longer exchanged
Section signal carries out processing and no longer output frequency tuning control signal.In addition, adjusting threshold feedback signal can also include example
Such as the initial position signal of microwave source 210.Protective module 2620 can pass the initial position signal via control module 2520
It is defeated to arrive memory 2510, to be stored in memory 2510.Protective module 2620 is by reading the frequency tune in microwave source 210
The information such as machinery, the electronic signal of mechanism are saved, determine position and the restriction state of frequency adjustment mechanism；And by mechanically or electrically
The protection mechanism of son, to avoid the frequency adjustment mechanism or internal structure of damage microwave source.In addition, protective module 2620 passes through reading
Take opposite or absolute position, the miscellaneous functions such as initialization of the initial position Lai Shixian.
Fig. 4 a to Fig. 4 c diagrammatically illustrates each in the intelligence AFC equipment according to shown in Fig. 3 of the embodiment of the present disclosure
The structure chart of a module.
Phase shift block 2410 may include digital phase shifter 420, be connected with the first signal input part, and be configured as from
One signal input part receives incidence wave, carries out phase shift to incidence wave according to phase shift parameters to generate the first phase shift signal, and to filter
Wave device exports the first phase shift signal；First filter 421 is connected with digital phase shifter 420, and is configured as believing the first phase shift
It number is filtered to generate the first filtering signal, and export the first filtering signal to the first attenuator；First attenuator 422, with
First filter 421 is connected, and is configured as decaying to the first filtering signal to generate the first deamplification, and to second
Filter exports the first deamplification；And second filter 423, it is connected with the first attenuator 422, and be configured as to first
Deamplification is filtered to generate the second filtering signal, and exports the second filtering signal as phase shift signal to phase demodulation module.
Phase shift block 2410 can also include digital switch, be connected to first filter 421 and the first attenuator 423 it
Between.
Phase demodulation module 2420 may include electric bridge, be connected with second filter 424 and second signal input terminal, and be configured
To receive back wave from second signal input terminal, phase demodulation is carried out to phase shift signal and back wave to generate phase difference signal, and via
Control interface 2450 exports phase difference signal.
First amplitude control module 2430 may include: the second attenuator 410, be connected with the first signal input part, and by
It is configured to receive incidence wave from the first signal input part, decay to incidence wave to generate the second deamplification, and to clipping
Device exports the second deamplification；Limiter 411 is connected with the second attenuator 410, and is configured as carrying out the second deamplification
Clipping is to generate limitation signal, and to third attenuator output violent change signal；And third attenuator 412, with 411 phase of limiter
Even, it and is configured as carrying out limitation signal further decaying to generate third deamplification, and exports third to phase shift block
Deamplification.
Second attenuator 410 can be fixed value attenuator.Third attenuator 412 may include digital variable attenuator and
Fixed value attenuator, wherein digital variable attenuator can be connected with limiter 411, and be configured as declining to limitation signal
Subtract to generate the first interim deamplification, and export the first interim deamplification to fixed value attenuator；And fixed value decaying
Device can be connected with digital variable attenuator, and it is interim to generate second to be configured as decaying to the first interim deamplification
Deamplification, and the second interim deamplification is exported to phase shift block 2410.
Second amplitude control module 2440 may include: the 4th attenuator 430, be connected with second signal input terminal, and by
It is configured to receive back wave from second signal input terminal, decay to back wave to generate the 4th deamplification, and to third
Filter 431 exports the 4th deamplification；And third filter 431, it is connected with the 4th attenuator 430, and be configured as pair
4th deamplification is filtered to generate third filtering signal, and exports third filtering signal to phase demodulation module 2420.
4th attenuator 430 may include: fixed value attenuator, be connected with second signal input terminal, and be configured as pair
Back wave decays to generate the interim deamplification of third, and exports the interim deamplification of third to digital variable attenuator；
Digital variable attenuator is connected with fixed value attenuator, and is configured as decaying to the interim deamplification of third to generate
4th interim deamplification, and the 4th interim deamplification is exported to the second fixed value attenuator；And second fixed value decaying
Device is connected with digital variable attenuator, and is configured as carrying out further decaying to the 4th interim deamplification to generate the 5th
Interim deamplification, and the 5th interim deamplification is exported to third filter.
In the alternative, electric bridge can be connected with second filter 424 and third filter 431, and be configured
To carry out phase demodulation to phase shift signal and third filtering signal to generate phase difference signal, and difference letter is exported via control interface 2450
Number.
Technical solution according to an embodiment of the present disclosure is in signal processing, control logic and device scale, level of integrated system
Aspect is all designed and is transformed, and AFC system is changed into digital control approach from traditional mechanical control method, raising it is easy
The property used；The complexity of system is significantly reduced, from original more discrete devices, is integrated into a digitlization chip controls
System；The remote debugging that can be realized operator reduces debugging with using difficulty, improves the period of production link,
It is improved in terms of system ease for use；And from cost, the chip cost that newly uses and original discrete device at
Originally it compares, has obtained significant reduction, hazard rate is also reduced with maintenance cost, has significant economic benefit.
It can be by there is the electricity of computing capability according to the above method of each embodiment of the disclosure, device, unit and/or module
Sub- equipment executes the software comprising computer instruction to realize.The system may include storage equipment, described above to realize
Various storages.The electronic equipment for having computing capability may include general processor, digital signal processor, dedicated processes
Device, re-configurable processor etc. are able to carry out the device of computer instruction, but not limited to this.Such instruction is executed so that electricity
Sub- equipment is configured as executing the above-mentioned operations according to the disclosure.Above-mentioned each equipment and/or module can be in an electronics
It realizes, can also be realized in distinct electronic apparatuses in equipment.These softwares may be stored in a computer readable storage medium.
Computer-readable recording medium storage one or more program (software module), one or more of programs include instruction, when
When one or more processors in electronic equipment execute described instruction, described instruction makes the side of the electronic equipment execution disclosure
Method.
These softwares can store the form for volatile memory or non-volatile memory device (such as similar to ROM etc.
Store equipment), it is whether erasable or rewritable, or it is stored as form (such as the RAM, storage core of memory
Piece, equipment or integrated circuit), or be stored on light readable medium or magnetic readable medium (for example, CD, DVD, disk or magnetic
Band etc.).It should be appreciated that storage equipment and storage medium are adapted for storing the machine readable storage dress of one or more programs
The embodiment set, one program or multiple programs include instruction, when executed, realize the implementation of the disclosure
Example.Embodiment provides program and stores the machine-readable storage device of this program, and described program includes for realizing the disclosure
Any one claim described in device or method code.Furthermore, it is possible to via any medium (for example, via wired
Connection is wirelessly connected the signal of communication carried) it sends a telegram here and transmits these programs, multiple embodiments uitably include these programs.
Such as field programmable gate can also be used according to the method, apparatus of each embodiment of the disclosure, unit and/or module
Array (FPGA), programmable logic array (PLA), system on chip, the system on substrate, the system in encapsulation, dedicated integrated electricity
Road (ASIC) can be for carrying out the hardware such as any other rational method that is integrated or encapsulating or firmware in fact to circuit
It is existing, or realized with software, the appropriately combined of three kinds of implementations of hardware and firmware.The system may include storage equipment,
To realize storage as described above.When realizing in such ways, used software, hardware and/or firmware be programmed or
It is designed as executing the corresponding above method, step and/or the function according to the disclosure.Those skilled in the art can be according to practical need
Come suitably by one or more of these systems and module, or in which a part or multiple portions use it is different upper
Implementation is stated to realize.These implementations each fall within the protection scope of the disclosure.
Although the disclosure, art technology has shown and described referring to the certain exemplary embodiments of the disclosure
Personnel it should be understood that in the case where the spirit and scope of the present disclosure limited without departing substantially from the following claims and their equivalents,
A variety of changes in form and details can be carried out to the disclosure.Therefore, the scope of the present disclosure should not necessarily be limited by above-described embodiment,
But should be not only determined by appended claims, also it is defined by the equivalent of appended claims.
Claims (16)
1. one kind is based on numerically controlled intelligent auto frequency control apparatus characterized by comprising
Phase shift block is connected with the first signal input part, and is configured as receiving incidence wave from the first signal input part, according to phase
Shifting parameter carries out phase shift to incidence wave to generate phase shift signal, and exports phase shift signal to phase demodulation module；And
Phase demodulation module is connected with phase shift block and second signal input terminal, and is configured as receiving from second signal input terminal anti-
Ejected wave carries out phase demodulation to phase shift signal and back wave to generate phase difference signal, and exports phase difference signal via control interface.
2. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, wherein phase shift parameters are several
Word controls signal.
3. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, wherein incidence wave is by micro-
What wave source generated, and back wave is that incidence wave is generated via electronic linear accelerating tube reflection.
4. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, wherein phase shift block packet
It includes:
Digital phase shifter is connected with the first signal input part, and is configured as receiving incidence wave from the first signal input part, according to
Phase shift parameters carry out phase shift to incidence wave to generate the first phase shift signal, and export the first phase shift signal to first filter；
First filter is connected with digital phase shifter, and is configured as being filtered the first phase shift signal to generate the first filter
Wave signal, and the first filtering signal is exported to the first attenuator；
First attenuator, is connected with first filter, and is configured as decaying to the first filtering signal to generate first and decline
Cut signal, and the first deamplification is exported to second filter；And
Second filter is connected with the first attenuator, and is configured as being filtered the first deamplification to generate the second filter
Wave signal, and the second filtering signal is exported as phase shift signal to phase demodulation module.
5. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, wherein phase shift block is also wrapped
Digital switch is included, is connected between first filter and the first attenuator.
6. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, wherein phase demodulation module packet
Include: electric bridge is connected with second filter and second signal input terminal, and is configured as receiving from second signal input terminal and reflect
Wave carries out phase demodulation to phase shift signal and back wave to generate phase difference signal, and exports phase difference signal via control interface.
7. according to claim 1 based on numerically controlled intelligent auto frequency control apparatus, which is characterized in that also wrap
It includes:
First amplitude control module is connected with the first signal input part, and is configured as receiving from the first signal input part incident
Wave is adjusted according to amplitude of the first amplitude adjusting parameter to incidence wave, and to the incidence wave after phase shift block output adjustment.
8. according to claim 7 based on numerically controlled intelligent auto frequency control apparatus, wherein first amplitude adjustment
Parameter is digital controlled signal.
9. according to claim 7 based on numerically controlled intelligent auto frequency control apparatus, wherein first amplitude control
Module includes:
Second attenuator is connected with the first signal input part, and is configured as receiving incidence wave from the first signal input part, to entering
Ejected wave decays to generate the second deamplification, and exports the second deamplification to limiter；
Limiter is connected with the second attenuator, and is configured as carrying out clipping to the second deamplification to generate limitation signal, and
To third attenuator output violent change signal；And
Third attenuator, is connected with limiter, and is configured as carrying out limitation signal further decaying to generate third decaying
Signal, and third deamplification is exported to phase shift block.
10. according to claim 9 based on numerically controlled intelligent auto frequency control apparatus, wherein third attenuator
Including digital variable attenuator and fixed value attenuator, wherein
Digital variable attenuator is connected with limiter, and is configured as decaying to limitation signal to generate the first temporarily decaying
Signal, and the first interim deamplification is exported to fixed value attenuator；And
Fixed value attenuator is connected with digital variable attenuator, and is configured as decaying with life to the first interim deamplification
The second interim deamplification is exported at the second interim deamplification, and to phase shift block.
11. according to claim 9 based on numerically controlled intelligent auto frequency control apparatus, wherein the second attenuator
It is fixed value attenuator.
12. according to claim 1 or claim 7 based on numerically controlled intelligent auto frequency control apparatus, which is characterized in that also
Include:
Second amplitude control module, is connected with second signal input terminal, and is configured as receiving from second signal input terminal and reflect
Wave is adjusted according to amplitude of second amplitude-adjustment parameters to back wave, and to the back wave after phase demodulation module output adjustment.
13. according to claim 12 based on numerically controlled intelligent auto frequency control apparatus, wherein the second amplitude tune
Whole parameter is digital controlled signal.
14. according to claim 4 based on numerically controlled intelligent auto frequency control apparatus, wherein the second amplitude control
Molding block includes:
4th attenuator is connected with second signal input terminal, and is configured as receiving back wave from second signal input terminal, to anti-
Ejected wave decays to generate the 4th deamplification, and exports the 4th deamplification to third filter；And
Third filter is connected with the 4th attenuator, and is configured as being filtered the 4th deamplification to generate third filter
Wave signal, and third filtering signal is exported to phase demodulation module.
15. according to claim 14 based on numerically controlled intelligent auto frequency control apparatus, wherein the 4th attenuator
Include:
Fixed value attenuator is connected with second signal input terminal, and is configured as decaying to back wave to generate third and face
When deamplification, and to digital variable attenuator export the interim deamplification of third；
Digital variable attenuator is connected with fixed value attenuator, and be configured as decaying to the interim deamplification of third with
The 4th interim deamplification is generated, and exports the 4th interim deamplification to the second fixed value attenuator；And
Second fixed value attenuator, is connected with digital variable attenuator, and be configured as carrying out the 4th interim deamplification into
The decaying of one step exports the 5th interim deamplification to third filter to generate the 5th interim deamplification.
16. according to claim 14 based on numerically controlled intelligent auto frequency control apparatus, wherein electric bridge and second
Filter is connected with third filter, and is configured as carrying out phase demodulation to phase shift signal and third filtering signal to generate difference letter
Number, and phase difference signal is exported via control interface.
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| CN201821099130.5U CN208607357U (en) | 2018-07-11 | 2018-07-11 | Based on numerically controlled intelligent auto frequency control apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020010973A1 (en) * | 2018-07-11 | 2020-01-16 | 同方威视技术股份有限公司 | Digital control-based intelligent automatic frequency control device |
| CN112003610A (en) * | 2020-08-13 | 2020-11-27 | 上海联影医疗科技股份有限公司 | Control device and method based on automatic frequency control module and radiotherapy equipment |
-
2018
- 2018-07-11 CN CN201821099130.5U patent/CN208607357U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020010973A1 (en) * | 2018-07-11 | 2020-01-16 | 同方威视技术股份有限公司 | Digital control-based intelligent automatic frequency control device |
| US11885869B2 (en) | 2018-07-11 | 2024-01-30 | Nuctech Company Limited | Smart automatic frequency control apparatus based on digital control |
| CN112003610A (en) * | 2020-08-13 | 2020-11-27 | 上海联影医疗科技股份有限公司 | Control device and method based on automatic frequency control module and radiotherapy equipment |
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