CN106442742A - 100kW-grade broad-band electromagnetic ultrasonic excitation source - Google Patents
100kW-grade broad-band electromagnetic ultrasonic excitation source Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The invention discloses a 100kW-grade broad-band electromagnetic ultrasonic excitation source, wherein the 100kW-grade broad-band electromagnetic ultrasonic excitation source comprises a first group of initial signals and a second group of initial signals which are generated through a signal generator; afterwards, amplification is carried out on the first group of initial signals through a left-arm high-end drive circuit and a right-arm low-end drive circuit, so as to drive to switch on a left-arm high-end switch and a right-arm low-end switch; at the moment, a frequency selection circuit outputs a high-voltage signal; the amplification is also carried out on the second group of initial signals through a left-arm low-end drive circuit and a right-arm high-end drive circuit, so as to drive to switch on a left-arm low-end switch and a right-arm high-end switch; at the moment, a voltage output from the frequency selection circuit is approximately zero; the purpose of enabling the frequency selection circuit to output a limited period of high-voltage pulse signal through controlling the switching on of a multi-way switching circuit is realized, so as to excite an electromagnetic ultrasonic energy converter to generate an ultrasonic wave in a to-be-detected structure. By using the 100kW-grade broad-band electromagnetic ultrasonic excitation source, the technical problem that the output power, in a wider frequency range, of an electromagnetic ultrasonic detecting instrument is lower in the prior art is solved.
Description
Technical field
The present invention relates to field of non destructive testing, source is motivated by ultrasound in particular to a kind of 100kW level broadband electromagnetical.
Background technology
At present, there is the hardwares such as numerous high-temperature pipes, boiler and reactor in the industry such as petrochemical industry, electric power.Due to part
High-temperature metal equipment more difficult shut down detection or shut down testing cost too high, therefore, active demand develop high-temperature metal equipment
Labour detection technique.At present, conventional piezoelectric supersonic detection technique, due to volatilization and the piezoelectric Curie temperature itself of couplant
Restriction so that they more difficult carry out live effective detection to more than 300 DEG C equipment.
Electromagnetic acoustic detection technique without couplant, simultaneously because the noncontact characteristic of electromagnetic acoustic detection technique so that
It is particularly suitable for the Non-Destructive Testing of high-temperature metal equipment.But the rising of temperature, on the one hand, can cause materials conductive to be checked,
The change of permeance, sometimes results in electro-acoustic energy conversion efficiency and reduces；On the other hand, Acoustic Wave Propagation Characteristics can also be caused
Change.Further, because high-temperature service adopts various stainless steel material manufactures, for example, 400～500 DEG C of high temperature materials mostly
12Cr1MoVG stainless steel commonly used by the conventional P11 stainless steel of material, 500～600 DEG C of high-temperature materials, and the magnetic conduction of these materials itself is special
Property very weak, detection signal can be made to decay further or signal to noise ratio reduce.
At present, both at home and abroad the transient state power output of widely used electromagnetic acoustic detecting instrument all below tens of kilowatt.
Due to existing driving source power output restriction so that this technology at present for high-temperature metal device detection signal signal to noise ratio relatively
, also the technical side improving detection signal signal to noise ratio by increasing testing equipment power output in difference in existing technology
Case.In addition, the detection frequency that different materials are suitable in different temperatures scope is different, prior art driving source output signal bandwidth
Narrower.
Content of the invention
Embodiments provide a kind of 100kW level broadband electromagnetical ultrasonic action source, at least to solve in prior art
Electromagnetic acoustic detecting instrument the relatively low technical problem of power output in wider frequency range.
One side according to embodiments of the present invention, there is provided a kind of 100kW level broadband electromagnetical is motivated by ultrasound source, including：
Signal generator, for generating first group of initial signal and second group of initial signal, wherein, described first group of initial signal and institute
Stating second group of initial signal is opposite polarity signal, comprises even number initial signal in described first group of initial signal, described
Even number initial signal is comprised in second group of initial signal；Multi-channel driver circuit, is connected with described signal generator, for inciting somebody to action
Described first group of initial signal and described second group of initial signal are amplified；Multi-way switch circuit, on-off circuit described in a road
It is connected with drive circuit described in a road, wherein, described multi-way switch circuit is initially believed according to described first group after amplifying
Number and described second group of initial signal adjust running status, wherein, described running status includes turning on or turns off；Frequency-selecting electricity
Road, described frequency selection circuit by the first end of described frequency selection circuit and the second end respectively with being connected of described multi-way switch circuit
Connect, the output end of described frequency selection circuit is connected with electromagnet ultrasonic changer, wherein, described frequency selection circuit is according to described operation shape
State exports echo signal, and wherein, described echo signal is used for encouraging described electromagnet ultrasonic changer to produce in structure to be checked surpassing
Sound wave.
Further, described multi-channel driver circuit includes：First group of drive circuit, is connected with described signal generator,
For being amplified the even number initial signal in described first group of initial signal, obtain first voltage signal group；Second group
Drive circuit, is connected with described signal generator, for entering the even number initial signal in described second group of initial signal
Row amplifies, and obtains second voltage signal group.
Further, described first group of drive circuit group includes left arm high-end drive circuit and right arm low-side driver circuitry,
Described second group of drive circuit includes left arm low-side driver circuitry and right arm high-end drive circuit.
Further, described multi-way switch circuit includes：First switch group, is connected with described first group of drive circuit,
Wherein, when the magnitude of voltage of the first end being carried in described first switch group and the described first voltage signal group at the second end two ends is full
During foot the first predeterminated voltage, described first switch conducting group；Second switch group, is connected with described second group of drive circuit, its
In, when the magnitude of voltage of the first end being carried in described second switch group and the described second voltage signal group at the second end two ends meets
During the second predeterminated voltage, described second switch group conducting.
Further, described first switch group includes left arm high-end switch and right arm low-end switch, described second switch group
Including left arm low-end switch and right arm high-end switch, wherein, described left arm high-end switch includes at least one first FET,
Described right arm low-end switch includes at least one second FET, and described left arm low-end switch includes at least one the 3rd effect
Ying Guan, described right arm high-end switch includes at least one the 4th FET.
Further, the drain electrode of each described first FET connects high-voltage power circuit, each described first field-effect
The source electrode of pipe is connected with the left end of described frequency selection circuit；Each described second FET source ground, each described second
The drain electrode of FET is connected with the right-hand member of described frequency selection circuit；The source ground of each described 3rd FET, each
The drain electrode of described 3rd FET is connected with the left end of described frequency selection circuit；The drain electrode of each described 4th FET connects
High-voltage power circuit, the source electrode of each described 4th FET is connected with the right-hand member of described frequency selection circuit.
Further, described frequency selection circuit includes the first electric capacity and transformer, wherein, the first end of described first electric capacity with
The source electrode of each described first FET is connected with the drain electrode of the 3rd FET each described, and the of described first electric capacity
Two ends are connected with the first end of described transformer primary side, and the second end of described transformer primary side is leaked with described second FET
Pole is connected with the source electrode of described 4th FET, and the secondary of described transformer is connected with described electromagnet ultrasonic changer.
Further, also include：High-voltage power circuit, the first end of described power circuit respectively with each the first field-effect
The drain electrode of pipe is connected with the drain electrode of each the 4th FET described, the second end ground connection of described high-voltage power circuit, described
High-voltage power circuit is used for providing high voltage signal for described frequency selection circuit.
Further, described multi-channel driver circuit Zhong Mei road drive circuit includes：Digital-to-analogue isolation circuit, is sent out with described signal
Raw device is connected, and source is motivated by ultrasound for isolating the digital circuit in described signal generator to described 100kW level broadband electromagnetical
In analog circuit interference；FET drive circuit, is connected with digital-to-analogue isolation circuit described in a path switching circuit respectively,
For the input output voltage signal to a connected described path switching circuit, wherein, described voltage signal is used for
Drive a described road FET on or off.
Further, described 100kW level broadband electromagnetical ultrasonic action source also includes：Multiple suppression circuits, a described suppression
Circuit processed is connected with a road FET, wherein, the drain electrode of the first end of described suppression circuit and a described road FET
It is connected, the second end of described suppression circuit is connected with the source electrode of a described road FET.
Further, in the plurality of suppression circuit, each suppression circuit includes the second electric capacity, resistance and diode, its
In, it is connected in parallel on source electrode and the drain electrode of described FET after described second electric capacity and described Diode series, described resistance is simultaneously
It is associated in the two ends of described diode.
Further, in described multi-way switch circuit, each on-off circuit includes N number of FET, wherein, described N number of field
In effect pipe, the grid of each FET is connected, and is connected with the output end of described FET drive circuit, described
The drain electrode of each FET is connected, and the source electrode of each FET described is connected, and N is just whole more than or equal to 1
Number.
Further, described signal generator includes field programmable gate array.
In embodiments of the present invention, in the first group of initial signal by multi-channel driver circuit, signal generator being generated
Even number initial signal in even number initial signal and second group of initial signal is amplified, then, after amplifying
Even number initial signal controls the running status of the bridge switching circuit of multi-way switch circuit composition, and then, by running status
The echo signal of the output of adjustment frequency selection circuit, with respect in prior art, the 100kW level broadband electromagnetical that the present invention provides is ultrasonic
Driving source has reached the purpose of the power output increasing electromagnetic acoustic detecting instrument, it is achieved thereby that reducing electromagnetic acoustic detector
The technique effect of the signal to noise ratio of device, so solve electromagnetic acoustic detecting instrument of the prior art in wider frequency range
The relatively low technical problem of power output.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
A kind of 100kW level broadband electromagnetical that Fig. 1 is according to embodiments of the present invention is motivated by ultrasound the schematic diagram in source；
A kind of alternatively 100kW level broadband electromagnetical that Fig. 2 is according to embodiments of the present invention is motivated by ultrasound the schematic diagram in source；
Fig. 3 be another kind according to embodiments of the present invention alternatively 100kW level broadband electromagnetical be motivated by ultrasound source switch electricity
Road and frequency selection circuit partial schematic diagram；
Fig. 4 is a kind of schematic diagram of left arm high-end drive circuit according to embodiments of the present invention；
Fig. 5 is a kind of schematic diagram of left arm low-side driver circuitry according to embodiments of the present invention；
Fig. 6 is a kind of schematic diagram of right arm high-end drive circuit according to embodiments of the present invention；
Fig. 7 is a kind of schematic diagram of right arm low-side driver circuitry according to embodiments of the present invention；
Fig. 8 is a kind of schematic diagram of signal generator according to embodiments of the present invention；
Fig. 9 is a kind of waveform diagram of echo signal according to embodiments of the present invention；And
Figure 10 is a kind of waveform diagram of alternatively echo signal according to embodiments of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention it is clear that described embodiment is only
The embodiment of a present invention part, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that such use
Data can exchange in the appropriate case so that embodiments of the invention described herein can with except here diagram or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation are it is intended that cover
Cover non-exclusive comprising, for example, contain series of steps or process, method, system, product or the equipment of unit are not necessarily limited to
Those steps clearly listed or unit, but may include clearly not listing or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to embodiments of the present invention, there is provided a kind of 100kW level broadband electromagnetical is motivated by ultrasound the embodiment in source, needs explanation
, the step illustrating in the flow process of accompanying drawing can hold in the computer system of such as one group of computer executable instructions
OK, and although showing logical order in flow charts, but in some cases, can be with different from order herein
The shown or described step of execution.
A kind of 100kW level broadband electromagnetical that Fig. 1 is according to embodiments of the present invention is motivated by ultrasound the schematic diagram in source, as Fig. 1 institute
Show, this 100kW level broadband electromagnetical ultrasonic action source includes：Signal generator 101, multi-channel driver circuit 102, multi-way switch circuit
103 and frequency selection circuit 104, wherein：
Signal generator 101, for generating first group of initial signal and second group of initial signal, wherein, first group initial
Signal and second group of initial signal are opposite polarity signal, comprise even number initial signal in first group of initial signal, second
Even number initial signal is comprised in group initial signal.
In embodiments of the present invention, first group of initial signal and second group of initial signal are voltage signal it is preferable that just
Beginning signal is limit cycle square-wave signal.Therefore, in the present invention, limited according to predeterminated frequency transmitting using signal generator
Periodic signal of square wave, wherein, the frequency of limit cycle square-wave signal of transmitting and dutycycle are pre-set.
As shown in figure 1, signal generator generates 4 tunnel initial signals by port 1 to port 4, wherein, port 1 and end
The signals of mouth 3 generation are first group of initial signal, and the signal of port 2 and port 4 generation is second group of initial signal, wherein, holds
The signal polarity that mouth 1 generates with port 3 is identical, and the cycle is equal, and the signal polarity that port 2 generates with port 4 is identical, cycle phase
Deng however, the signal polarity that port 1 and port 2 generate is contrary, the cycle is equal.
Multi-channel driver circuit 102, is connected with signal generator, for initially believing first group of initial signal and second group
Number it is amplified.
In embodiments of the present invention, multi-channel driver circuit 102 includes：First group of drive circuit and second group of drive circuit,
Wherein, first group of drive circuit is connected with signal generator 101, for initially believing the even number in first group of initial signal
Number it is amplified, obtain first voltage signal group；Second group of drive circuit is equally connected with signal generator 101, for inciting somebody to action
Even number initial signal in second group of initial signal is amplified, and obtains second voltage signal group.
Specifically, as shown in figure 1, first group of drive circuit includes left arm high-end drive circuit 1021 and the driving of right arm low side
Circuit 1023；Second group of drive circuit includes left arm low-side driver circuitry 1022 and right arm high-end drive circuit 1024.
From figure 1 it appears that the signal of left arm high-end drive circuit 1021 receiving port 1 output, right arm high-side driver
The signal of circuit 1024 receiving port 4 output, wherein, the signal of port 1 output is identical with the signal period that port 4 exports, pole
Property is contrary；The signal of left arm low-side driver circuitry 1022 receiving port 2 output, left arm low-side driver circuitry 1023 receiving port 3
The signal of output, the signal of port 2 output is identical with the signal period that port 3 exports, opposite polarity, but port 1 and port 3
The signal period of output is identical, and polarity is identical.
Multi-way switch circuit 103, a path switching circuit is connected with a road drive circuit, wherein, multi-way switch circuit according to
Adjust running status according to first group of initial signal after amplifying and second group of initial signal, wherein, running status includes turning on
Or turn off.
In embodiments of the present invention, multi-way switch circuit 103 includes：First switch group and second switch group, specifically, the
One switches set is connected with the first drive circuit group, wherein, when the first end being carried in first switch group and the second end two ends
When the magnitude of voltage of first voltage signal group meets the first predeterminated voltage, first switch conducting group；Second switch group and the second driving
Circuit group is connected, wherein, when the electricity of the first end being carried in second switch group and the second voltage signal group at the second end two ends
When pressure value meets the second predeterminated voltage, second switch group turns on.
Specifically, as shown in figure 1, first switch group includes left arm high-end switch 1031 and right arm low-end switch 1033；The
Two switches set include left arm low-end switch 1032 and right arm high-end switch 1034, and wherein, left arm high-end switch includes at least one
First FET, right arm low-end switch includes at least one second FET, left arm low-end switch include at least one
Three FETs, right arm high-end switch includes at least one the 4th FET.Specifically, the first FET, second effect
Annexation between Ying Guan, the 3rd FET and the 4th FET will be described in detail in the following embodiments.
From figure 1 it appears that the output end 6 of left arm high-end switch 1031 first end 12 with frequency selection circuit 104 respectively
It is connected with the input 15 of left arm low-end switch 1032, input 17 and the right arm high-end switch of left arm high-end switch 1031
1034 input 18 is connected, and is connected to the output end of high-voltage power circuit, 9 points of the output end of right arm high-end switch 1034
Be not connected with the second end 13 of frequency selection circuit 104 and the input 16 of right arm low-end switch 1033, left arm low-end switch defeated
Go out end 8 and the output end 11 of right arm low-end switch is grounded.Wherein, when the first electricity being carried in 1031 two ends (that is, 5 and 6 two ends)
Energy conversion device conducting when pressure signal is more than or equal to the first predeterminated voltage, in 1031；When being carried in 1033 two ends
When the first voltage signal at (that is, 10 and 11 two ends) is more than or equal to the first predeterminated voltage, the energy conversion device in 1033
Conducting；When the second voltage signal being carried in 1032 two ends (that is, 7 and 8) is more than or equal to the second predeterminated voltage, in 1032
Energy conversion device conducting；When the second voltage signal being carried in 1034 two ends (that is, 9 and 17 two ends) is more than or equal to the
Energy conversion device conducting during two predeterminated voltages, in 1034.
From figure 1 it appears that in embodiments of the present invention, above-mentioned left arm high-end switch 1031, left arm low-end switch
1032nd, right arm low-end switch 1033 and right arm high-end switch 1034 constitute the drive circuit of a full-bridge type, when 1031,1032,
1033 and during 1034 alternate conduction, realize frequency selection circuit and export periodic Pulse High Voltage signal (that is, echo signal).
From figure 1 it appears that 1021 port 5 ' is connected with 1031 port 5,1021 port 6 ' and 1031
Port 6 is connected, and wherein, port 6 and port 6 ' are not directly grounded.Therefore, 1021 form suspension drive circuit at 1031 two ends,
To drive 1031 conducting or shutoff.
1022 port 7 ' is connected with 1032 port 7, and 1022 port 8 ' is connected with 1032 port 8, wherein,
Port 8 and port 8 ' are directly grounded, and therefore, 1022 do not form suspension drive circuit at 1031 two ends.
1023 port 10 ' is connected with 1033 port 10, and 1023 port 11 ' is connected with 1033 port 11,
Wherein, port 11 and port 11 ' are directly grounded.Therefore, 1023 do not form suspension drive circuit at 1033 two ends.
1024 port 9 ' is connected with 1034 port 9, and 1024 port 17 ' is connected with 1034 port 17, its
In, port 9 and port 9 ' are not directly grounded.Therefore, 1024 suspension drive circuit are formed at 1034 two ends, to drive 1034 lead
Lead to or turn off.
Frequency selection circuit 104, the left end of frequency selection circuit is connected with one end of multi-way switch circuit respectively with right-hand member, frequency-selecting electricity
The output end on road is connected with electromagnet ultrasonic changer, and wherein, frequency selection circuit exports echo signal according to running status, wherein,
Echo signal is used for encouraging electromagnet ultrasonic changer to produce ultrasonic wave in structure to be checked.
In embodiments of the present invention, in the first group of initial signal by multi-channel driver circuit, signal generator being generated
Even number initial signal in even number initial signal and second group of initial signal is amplified, then, after amplifying
Even number initial signal controls the running status of the bridge switching circuit of multi-way switch circuit composition, and then, by running status
The echo signal of the output of adjustment frequency selection circuit, wherein, the echo signal of output is high voltage signal, with respect to prior art
In, the 100kW level broadband electromagnetical that the present invention provides is motivated by ultrasound source and has reached the power output increasing electromagnetic acoustic detecting instrument
Purpose, it is achieved thereby that reducing the technique effect of the signal to noise ratio of electromagnetic acoustic detecting instrument, and then solve in prior art
Electromagnetic acoustic detecting instrument the relatively low technical problem of power output in wider frequency range.
It should be noted that in embodiments of the present invention, signal generator 101 is properly termed as governor circuit again.
Specifically, the operation principle that 100kW level broadband electromagnetical as shown in Figure 1 is motivated by ultrasound source is as follows：
In embodiments of the present invention, governor circuit is used for transmitting four road limit cycle square-wave signals, wherein, periodicity side
The tranmitting frequency of ripple signal and cycle are set in advance, wherein, the pole of the periodic square wave signal of port 1 and port 3 output
Property is identical, and port 2 is identical with the polarity of the periodic square wave signal that port 4 exports.Port 1 and the square-wave signal of port 3 output
It is respectively left arm high-end drive circuit 1021 and right arm low-side driver circuitry 1023 provides two-way periodic square wave signal；Port 2
It is respectively the two of left arm low-side driver circuitry 1022 and right arm high-end drive circuit 1024 offer with the square-wave signal of port 4 output
Road periodic square wave signal polarity is identical, wherein, is left arm high-end drive circuit and left arm low-side driver circuitry offer square wave letter
Number polarity must be contrary, be right arm high-end drive circuit and right arm low-side driver circuitry provides the polarity of square-wave signal also necessary
On the contrary.
Left arm high-end drive circuit 1021 be mainly used in by input a road periodic signal of square wave therein (that is, port 1 exports
Initial signal) carry out power amplification, and the drive signal after power amplification is loaded directly in left arm high-end switch 1031
Input stage and the left end of frequency selection circuit 104；Right arm low-side driver circuitry 1023 is mainly used in input a road cycle side therein
Ripple signal (that is, the initial signal of port 3 output) carries out power amplification, and the drive signal after power amplification is loaded directly into
Between the input stage of right arm low-end switch 1033 and ground potential.Right arm high-end drive circuit 1024 is mainly used in therein by inputting
The multiple periodic signal of square wave of one tunnel reversed polarity (that is, the initial signal of port 4 output) carries out power amplification, and by after power amplification
Drive signal be loaded directly into the right-hand member of input stage in right arm high-end switch 1034 and frequency selection circuit 104；Left arm low side drives
Circuit 1022 is mainly used in the input multiple periodic signal of square wave of a road reversed polarity therein (that is, the initial letter of port 2 output
Number) carry out power amplification, and by the drive signal after power amplification be loaded directly into left arm low-end switch 1032 input stage and
Between ground potential.
In embodiments of the present invention, left arm high-end switch, right arm high-end switch, left arm low-end switch and right arm low-end switch
In all comprise energy conversion device.Due to the opposite polarity of the initial signal that initial signal and the port 2 of port 1 output export,
Therefore, when the energy conversion device conducting in left arm high-end switch and right arm low-end switch, left arm low-end switch and right arm are high
Energy conversion device in end switch turns off；On the contrary, when the energy converter in left arm high-end switch and right arm low-end switch
Energy conversion device conducting when part turns off, in left arm low-end switch and right arm high-end switch.
Specifically, the high level signal (that is, road first voltage signal) of left arm high-end drive circuit 1021 output controls
The conducting of the energy conversion device in left arm high-end switch 1031 is so that the first end 12 of frequency selection circuit 104 is existed with high voltage power supply
Turn on during this.Meanwhile, high level signal (that is, another road first voltage signal) control of right arm low-side driver circuitry 1023 output
Energy conversion device conducting in right arm low switch 1033 processed is so that the second end 13 of frequency selection circuit 104 and ground potential are in this phase
Between turn on.
When 1031 and 1033 turn on, frequency selection circuit is by the high voltage arteries and veins of energy conversion device in left arm high-end switch
Punching is carried in the left and right end of frequency selection circuit network respectively with the electronegative potential of energy conversion device in right arm low-end switch, enters
And, provide high voltage signal (that is, target letter from the output port of frequency selection circuit for the output port of electromagnet ultrasonic changer 105
Number).
The high level signal (that is, road second voltage signal) of above-mentioned right arm high-end drive circuit 1024 output controls right arm
Energy conversion device conducting in high-end switch 1034 so that frequency selection circuit 104 second end 13 with power circuit 106 during this period
Conducting.Meanwhile, the high level signal (that is, another road second voltage signal) of left arm low-side driver circuitry 1022 output controls left arm
Energy conversion device in low-end switch 1032 turns on so that the first end 12 of frequency selection circuit 104 is led during this period with ground potential
Logical.
When 1032 and 1034 turn on, frequency selection circuit is high electric by energy conversion device in right arm high-end switch 1034
Pressure pulse is carried in frequency selection circuit respectively with the electronegative potential of the energy conversion device output in left arm low-end switch 1032
Right left input, and provide ground potential from the output port of frequency selection circuit for the output port of electromagnet ultrasonic changer.
As in an optional embodiment of the embodiment of the present invention, the circuit diagram that Fig. 1 can be equivalent to as Fig. 2, Fig. 2
Be another kind according to embodiments of the present invention alternatively 100kW level broadband electromagnetical be motivated by ultrasound source schematic diagram.
In an optional embodiment of the present invention, in multi-way switch circuit, each on-off circuit includes FET,
Wherein, the grid of FET is connected with the output end of drive circuit.
In another optional embodiment of the present invention, it is high-end that the first switch group in multi-way switch circuit includes left arm
Switch and right arm low-end switch, the second switch group in multi-way switch circuit includes left arm low-end switch and right arm high-end switch,
Wherein, left arm high-end switch includes at least one first FET, and right arm low-end switch includes at least one second field-effect
Pipe, left arm low-end switch includes at least one the 3rd FET, and right arm high-end switch includes at least one the 4th FET.
That is, each on-off circuit includes N number of FET, wherein, in N number of FET, the grid of each FET is connected,
And be connected with the output end of drive circuit, the drain electrode of each FET is connected, and the source electrode of each FET is connected,
N is the positive integer more than or equal to 1.That is, in embodiments of the present invention, each in multi-channel driver circuit drives electricity
Road can be made up of a FET, can also be formed in parallel by N number of FET.
In 100kW level broadband electromagnetical ultrasonic action source as shown in Figure 2, to comprise a field effect in each on-off circuit
Should illustrate as a example pipe, specifically, above-mentioned left arm high-end switch is the M1 in Fig. 2, and left arm low-end switch is in Fig. 2
M2, right arm high-end switch is the M3 in Fig. 2, and right arm low-end switch is the M4 in Fig. 2.
From figure 2 it can be seen that the drain electrode of each first FET (for example, M1) connects high voltage, each described first
The source electrode of FET (for example, M1) is connected with the first end of frequency selection circuit；Each second FET (for example, M4) source electrode
Ground connection, the drain electrode of each second FET (for example, M4) is connected with the second end of frequency selection circuit；Each the 3rd FET
Source ground, the drain electrode of each the 3rd FET (for example, M2) is connected with the left end of frequency selection circuit；Each the 4th effect
The drain electrode that (for example, M3) should be managed connects high voltage, the source electrode of each the 4th FET (for example, M3) and the right-hand member phase of frequency selection circuit
Connect.As shown in Figure 2, the source electrode of M1 and M3 is not directly grounded, but has been connected on the two ends of frequency selection circuit, however, M2 and
The source electrode of M4 is directly connected on ground terminal.
In another optional embodiment of the present invention, 100kW level broadband electromagnetical ultrasonic action source also includes：Multiple suppressions
Circuit processed, a suppression circuit is connected with a road FET, wherein, the first end of suppression circuit and a road FET
Drain electrode is connected, and the source electrode of the second Duan Yu mono- road FET of suppression circuit is connected.
Further, in multiple suppression circuits, each suppression circuit includes the second electric capacity, resistance and diode, wherein, the
It is connected in parallel on source electrode and the drain electrode of FET, resistor coupled in parallel is at the two ends of diode after two electric capacity and Diode series.
As shown in Fig. 2 the suppression circuit being connected with FET M1 is by the second electric capacity C1, resistance R1 and diode D1 group
Become；The suppression circuit being connected with FET M2 is made up of the second electric capacity C2, resistance R2 and diode D2；With FET M3
The suppression circuit being connected is made up of the second electric capacity C3, resistance R3 and diode D3；The suppression electricity being connected with FET M4
It route the second electric capacity C4, resistance R4 and diode D4 composition.
In an optional embodiment of the present invention, frequency selection circuit includes：First electric capacity and transformer, wherein, first
The first end of electric capacity is connected with the output end of left arm high-end switch, the second end of the first electric capacity and the first end of transformer primary side
It is connected, the second end of transformer primary side is connected with the output end of right arm high-end switch, the secondary of transformer and electromagnetic acoustic
Transducer is connected.
As shown in Fig. 2 frequency selection circuit includes the first electric capacity C5 and transformer TX, wherein, the first end of the first electric capacity C5 with
The source electrode of M1 is connected, and second end of the first electric capacity C5 is connected with the first end of the former limit of transformer TX, transformer primary side
Second end is connected with the source electrode of M3, and the secondary of transformer is connected with load (Load).
The operation principle that 100kW level broadband electromagnetical as shown in Figure 2 is motivated by ultrasound source is as follows：
After in Fig. 1, signal generator 101 and left arm high-end drive circuit 1021 are processed, the first voltage signal of output can
It is equivalent to the periodic square wave signal of driving source V1 transmitting in Fig. 2.Signal generator 101 and left arm low-side driver circuitry in Fig. 1
After 1022 process, the second voltage signal of output can be equivalent to the periodic square wave signal of driving source V2 transmitting.Signal in Fig. 1
After generator 101 and right arm high-end drive circuit 1023 process, the second voltage signal of output can be equivalent to driving source in Fig. 2
The periodic square wave signal of V3 transmitting；Output after signal generator 101 and right arm low-side driver circuitry 1024 are processed in Fig. 1
First voltage signal can be equivalent to the periodic square wave signal of driving source V4 transmitting in Fig. 2.It should be noted that above-mentioned driving source
V1, driving source V2, driving source V3 and driving source V4 are preferable driving source.
In 100kW level broadband electromagnetical ultrasonic action source as shown in Figure 2, M1, M2, M3 and M4 are all chosen for N-channel work(
Rate FET.In fig. 2, the suppression circuit being made up of D1, C1, R1 is properly termed as high-end peak restrained circuit again, and this is high-end
Peak restrained circuit is used for the spiky jitter suppressing energy conversion device M1 switching characteristic to bring.The suppression being made up of D2, C2, R2
Circuit is properly termed as low side peak restrained circuit, and this low side peak restrained circuit is used for suppressing energy conversion device M2 switch special
The spiky jitter that property is brought.The suppression circuit being made up of D3, C3, R3 is properly termed as high-end peak restrained circuit again, this high-end point
Peak suppression circuit is used for the spiky jitter suppressing energy conversion device M3 switching characteristic to bring.The suppression electricity being made up of D4, C4, R4
Road is properly termed as low side peak restrained circuit again, and this low side peak restrained circuit is used for suppressing energy conversion device M4 switching characteristic
The spiky jitter bringing.
From figure 2 it can be seen that the low-voltage output of V1 suspends is carried in left end (that is, first electric capacity of frequency selection circuit 104
The first end of C5) and FET M1 source electrode, the high-voltage output end of V1 is carried in the grid of N-channel power field effect pipe M1,
Source electrode due to M1 is not directly grounded, and therefore, driving source V1 forms to suspend and drives, and the driving field effect in the way of suspending and driving
Should pipe M1.When V1 exports high level drive signal (that is, the first initial signal) in periodic square wave, in N-channel power field
The grid of effect pipe M1 and source electrode form certain pressure reduction (that is, the first predeterminated voltage) so that N-channel power field effect pipe M1
Drain electrode and source conduction, and the conducting resistance through M1 for the one end of C5 is turned on high voltage power supply VH, thus defeated for a frequency selection circuit left side
Entering end provides high pressure.Meanwhile, the low-voltage output of V4 should connect ground level, and the high-voltage output end of V4 is carried in N-channel power field
The grid of effect pipe M4, the high level drive signal in the periodic square wave of V4 output is in the grid of N-channel power field effect pipe M4
Pole and source electrode form certain pressure reduction (that is, the first predeterminated voltage) so that the drain electrode of N-channel power field effect pipe M4 and source electrode are led
Logical, the conducting resistance through M4 for the right input of frequency selection circuit is turned on ground potential, thus providing for the right input of frequency selection circuit
Compared with electronegative potential, now, FET M2, M3 should be at closed mode.
To sum up, turn in M1, M4, and M2, M3 down periods, the high pressure of frequency selection circuit left end and the low pressure of right-hand member will be in electricity
Former limit the 1st end holding the other end of C5 and transformer TX forms the high pressure of approximate 2 times of frequency-selective network left ends, and transformer TX
Former limit the 2nd end is low voltage, thus induce the high pressure letter of the left input of slightly below 2 times frequency-selective networks in transformer secondary
Number high voltage.
From figure 2 it can be seen that the low-voltage output of V3 suspends is carried in right input (that is, the transformer of frequency selection circuit
Second end of TX former limit) and FET M3 source electrode, the high-voltage output end of V3 is carried in the grid of N-channel power field effect pipe M3
Pole, the source electrode due to M3 is not directly grounded, and therefore, driving source V3 forms to suspend and drives, and the driving in the way of suspending and driving
FET M3.When V3 exports high level drive signal (that is, the second initial signal) in periodic square wave, in N-channel work(
The grid of rate FET M3 and source electrode forms certain pressure reduction (that is, the second predeterminated voltage) so that N-channel power field effect pipe
The drain electrode of M3 and source conduction, and the conducting resistance through M3 for the right input of frequency selection circuit is turned on high voltage power supply VH, thus
There is provided high pressure for the right input of frequency selection circuit.Meanwhile, the low-voltage output of V2 should connect ground level, and the high-voltage output end of V2 loads
High level drive signal in the grid of N-channel power field effect pipe M2, the periodic square wave of V2 output is in N-channel power field
The grid of effect pipe M2 and source electrode form certain pressure reduction (that is, the second predeterminated voltage) so that N-channel power field effect pipe M2
Drain electrode and source conduction, the conducting resistance through M2 for the left end of frequency selection circuit is turned on ground potential, thus being frequency selection circuit left end
There is provided compared with electronegative potential, now, FET M1, M4 should be at closed mode.
To sum up, turn in M2, M3, and M1, M4 down periods, the high pressure of frequency selection circuit right-hand member and the low pressure of left end will become
1st end of depressor TX former limit, the 2nd end form the equal high pressure of current potential, thus the voltage difference inducing in transformer secondary is approximate
It is zero.
In an optional embodiment of the present invention, also may be used in the 100kW level broadband electromagnetical ultrasonic action source shown in Fig. 1
To be equivalent to the 100kW level broadband electromagnetical ultrasonic action source shown in Fig. 3 to Fig. 7, below in conjunction with Fig. 3 to Fig. 7 to the present invention
Embodiment illustrates.Fig. 3 is another kind according to embodiments of the present invention alternatively 100kW level broadband electromagnetical ultrasonic action source
On-off circuit and frequency selection circuit partial schematic diagram.Fig. 4 is a kind of showing of left arm high-end drive circuit according to embodiments of the present invention
It is intended to.Fig. 5 is a kind of schematic diagram of left arm low-side driver circuitry according to embodiments of the present invention.Fig. 6 is to be implemented according to the present invention
A kind of schematic diagram of the right arm high-end drive circuit of example.Fig. 7 is a kind of right arm low-side driver circuitry according to embodiments of the present invention
Schematic diagram.
In an optional embodiment of the present invention, multi-channel driver circuit Zhong Mei road drive circuit includes：Digital-to-analogue is isolated
Circuit, is connected with signal generator, swashs for the digital circuit in isolation signals generator is ultrasonic to 100kW level broadband electromagnetical
Encourage the interference of the analog circuit in source；FET drive circuit, is connected with a path switching circuit digital-to-analogue isolation circuit respectively,
For the input output voltage signal to a connected path switching circuit, wherein, voltage signal is used for driving a road
FET on or off.
By foregoing description, in embodiments of the present invention, multi-channel driver circuit includes left arm high-end drive circuit, right
Arm high-end drive circuit, left arm low-side driver circuitry, right arm low-side driver circuitry.
The as shown in Figure 4 schematic diagram being left arm high-end drive circuit, as shown in figure 4, left arm high-end drive circuit bag
Include：Digital-to-analogue isolation circuit ISO_L_H and FET drive circuit DRIVER_L_H.Wherein, digital-to-analogue isolation circuit ISO_L_H is led to
Cross pin 2 to be connected with signal generator, for the digital circuit in isolation amplification signal generator to follow-up analog circuit
Interference；Then the first initial signal after isolating is inputted by pin 6 and drives to FET by digital-to-analogue isolation circuit ISO_L_H
In dynamic circuit DRIVER_L_H.And then, FET drive circuit DRIVER_L_H just can export first voltage by pin 7
Signal, to being attached thereto in FET (that is, the port as shown in DRV_L_H network interface in Fig. 3), is attached thereto with driving
The conducting of FET or shutoff.Figure 4, it is seen that the pin 7 of digital-to-analogue isolation circuit ISO_L_H and pin 5, with field
The pin 4 of effect tube drive circuit DRIVER_L_H, pin 5 are connected with pin 6, are both connected to network label Floating_
In interface shown in L_GND, wherein, Floating_L_GND interface is floating ground interface, drives for realizing suspending.Need
Illustrate, in embodiments of the present invention, in Fig. 4, the pin 4 of ISO_L_H is connected with digital grounding end.
The as shown in Figure 5 schematic diagram being left arm low-side driver circuitry, as shown in figure 5, left arm low-side driver circuitry bag
Include：Digital-to-analogue isolation circuit ISO_L_L and FET drive circuit DRIVER_L_L.Wherein, digital-to-analogue isolation circuit ISO_L_L is led to
Cross pin 2 to be connected with signal generator, for the digital circuit in isolation amplification signal generator to follow-up analog circuit
Interference；Then the second initial signal after isolating is inputted by pin 6 and drives to FET by digital-to-analogue isolation circuit ISO_L_L
In dynamic circuit DRIVER_L_H.And then, FET drive circuit DRIVER_L_L just can export second voltage by pin 7
Signal, to being attached thereto in FET (that is, the port as shown in DRV_L_L network interface in Fig. 3), is attached thereto with driving
The conducting of FET or shutoff.From figure 5 it can be seen that the pin 7 of digital-to-analogue isolation circuit ISO_L_L and pin 5, with field
The pin 4 of effect tube drive circuit DRIVER_L_H, pin 5 are connected with pin 6, all directly connect simulation ground.Need explanation
It is that in embodiments of the present invention, in Fig. 5, the pin 4 of ISO_L_L is connected with digital grounding end.
The as shown in Figure 6 schematic diagram being right arm high-end drive circuit, as shown in fig. 6, right arm high-end drive circuit bag
Include：Digital-to-analogue isolation circuit ISO_R_H and FET drive circuit DRIVER_R_H.Wherein, digital-to-analogue isolation circuit ISO_R_H is led to
Cross pin 2 to be connected with signal generator, for the digital circuit in isolation amplification signal generator to follow-up analog circuit
Interference；Then the second initial signal after isolating is inputted by pin 6 and drives to FET by digital-to-analogue isolation circuit ISO_R_H
In dynamic circuit DRIVER_R_H.And then, FET drive circuit DRIVER_R_H just can export first voltage by pin 7
Signal, to being attached thereto in FET (that is, the port as shown in DRV_R_H network interface in Fig. 3), is attached thereto with driving
The conducting of FET or shutoff.From fig. 6 it can be seen that the pin 7 of digital-to-analogue isolation circuit ISO_R_H and pin 5, with field
The pin 4 of effect tube drive circuit DRIVER_R_H, pin 5 are connected with pin 6, are both connected to network label Floating_
In interface shown in R_GND, wherein, Floating_R_GND interface is floating ground interface, drives for realizing suspending.Need
Illustrate, in embodiments of the present invention, in Fig. 6, the pin 4 of ISO_R_H is connected with digital grounding end.
The as shown in Figure 7 schematic diagram being right arm low-side driver circuitry, as shown in fig. 7, right arm low-side driver circuitry bag
Include：Digital-to-analogue isolation circuit ISO_R_L and FET drive circuit DRIVER_R_L.Wherein, digital-to-analogue isolation circuit ISO_R_L is led to
Cross pin 2 to be connected with signal generator, for the digital circuit in isolation amplification signal generator to follow-up analog circuit
Interference；Then the second initial signal after isolating is inputted by pin 6 and drives to FET by digital-to-analogue isolation circuit ISO_R_L
In dynamic circuit DRIVER_R_H.And then, FET drive circuit DRIVER_R_L just can export second voltage by pin 7
Signal, to being attached thereto in FET (that is, the port as shown in DRV_R_L network interface in Fig. 3), is attached thereto with driving
The conducting of FET or shutoff.It can be seen from figure 7 that the pin 7 of digital-to-analogue isolation circuit ISO_R_L and pin 5, with field
The pin 4 of effect tube drive circuit DRIVER_R_H, pin 5 are connected with pin 6, all directly connect simulation ground.Need explanation
It is that in embodiments of the present invention, in Fig. 7, the pin 4 of ISO_R_L is connected with digital grounding end.
Schematic diagram for signal generator as shown in Figure 8, as can be seen from Figure 8, in embodiments of the present invention, signal
Generator choose for field programmable gate array (FPGA).Four port IO1 to IO4 of FPGA are used for output four road signals,
Wherein, first group of initial signal is by the signal of port IO1 and IO4 output, by the signal of port IO2 and IO3 output
It is second group of initial signal.Network label IN_L_H in Fig. 8 represents that this port is connected with the network label IN_L_H in Fig. 4
Connect, the network label IN_L_L in Fig. 8 represents that this port is connected with the network label IN_L_L in Fig. 5, the network mark in Fig. 8
Number IN_R_H represents that this port is connected with the network label IN_R_H in Fig. 6, and the network label IN_R_L in Fig. 8 represents this end
Mouth is connected with the network label IN_R_L in Fig. 7.
When FPGA is as signal generator, 4 shown in Fig. 8 I/O port exports 4 tunnel periodic square wave signal, wherein,
Port IO1 is identical with the polarity of the signal that port IO4 exports, and port IO2 is identical with the polarity of the signal that port IO3 exports, and
And the cycle phase of square-wave signal that exports of port IO1 to port IO4 is with but the polarity that IO1, IO2 export square-wave signal must phase
Instead.
As shown in figure 3, left arm high-end switch comprises high side switching device, wherein, high side switching device (that is, energy conversion
Device) it is chosen for the power field effect pipe M1 of N-channel；The circuit being made up of D1, C1, R1 is high-end peak restrained circuit.Left arm
Low-end switch comprises low-end switch device, and wherein, low-end switch device (that is, energy conversion device) is chosen for the power of N-channel
FET M2；The circuit being made up of D2, C2, R2 is low side peak restrained circuit.Right arm high-end switch comprises high-end switch device
Part, wherein, high side switching device (that is, energy conversion device) is chosen for the power field effect pipe M3 of N-channel；By D3, C3, R3 structure
The circuit becoming is high-end peak restrained circuit.Right arm low-end switch comprises low-end switch device, and wherein, low-end switch device is (i.e.,
Energy conversion device) it is chosen for the power field effect pipe M4 of N-channel；The circuit being made up of D4, C4, R4 is low side peak restrained electricity
Road；Electric capacity C5 and transformer TX composition frequency-selective network；Load is electromagnetic ultrasonic transducer equivalent load.
When IO1, IO4 of FPGA send the periodic square wave signal of same frequency, identical polar, and IO2, IO3 send frequency
Rate is identical, but send with IO1 signal polarity contrary square-wave signal when, for ease of calculating the power output of whole circuit,
In the embodiment of the present invention, the high-power resistance choosing 8 Ω is as load.When the signal frequency of FPGA output is 1MHz, 8MHz,
The output voltage of load Load is respectively as shown in Figure 9 and Figure 10.Knowable to Fig. 9 and Figure 10, voltage magnitude (that is, the target of output
The amplitude of signal) reach as high as 920V, its maximum transient state power output all maximums are up to 100kW.Therefore, implemented using the present invention
The 100kW level broadband electromagnetical ultrasonic action source proposing in example, it is possible to achieve the peak power of output is 100kW, for improving this skill
Art provides instrument to support the In-service testing of high-temperature metal equipment.
The power output in source is motivated by ultrasound to increase 100kW level broadband electromagnetical, in the present invention using by N-channel field-effect
The full bridge structure (that is, above-mentioned high-end switch group and low-end switch group) that pipe is constituted, can will be wide for 100kW level used as driving source output stage
The power output of frequency electromagnetic acoustic driving source increases to 100kW.
The frequency of source output signal is motivated by ultrasound to improve 100kW level broadband electromagnetical, the present invention adopts digital-to-analogue isolation electricity
Road to realize the isolation of numerical portion and analog portion in foregoing circuit, meanwhile, in the full-bridge realized using high-speed driving circuit
In structure, because the fast driving of N-channel FET can effectively expand the height that 100kW level broadband electromagnetical is motivated by ultrasound source output
The bandwidth of pressure pulse signal.
Summary is got up, and 100kW level broadband electromagnetical ultrasonic action source provided in an embodiment of the present invention mainly includes advantages below：
From increasing power output angle, the embodiment of the present invention is using the full bridge structure conduct being made up of N-channel FET
Driving source output stage.Because N-channel FET conducting resistance is little, the power consuming in switching circuit portion is little, therefore, N ditch
Road FET hourglass source electrode can withstand up to hundreds of amperes of transient current.Further, by arranging suitable power circuit
Voltage, can by 100kW level broadband electromagnetical be motivated by ultrasound source power output increase to more than 100kW, to solve prior art
The relatively small problem of made driving source power output.
From the angle improving output signal frequency, digital circuits section and analog circuit portion are realized using digital-to-analogue isolation circuit
The isolation dividing, can effectively reduce the interference to artificial circuit part for the data signal, realized using FET high-speed driving circuit
The fast driving of N-channel FET in full bridge structure, can effectively expand the bandwidth of output high-voltage pulse signal.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part describing in detail, may refer to the associated description of other embodiment.
It should be understood that disclosed technology contents in several embodiments provided herein, can pass through other
Mode is realized.Wherein, device embodiment described above is only the schematically division of for example described unit, Ke Yiwei
A kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of unit or module or communication link
Connect, can be electrical or other form.
The described unit illustrating as separating component can be or may not be physically separate, show as unit
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.The purpose to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If described integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part in other words prior art being contributed or all or part of this technical scheme can be in the form of software products
Embody, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server or network equipment etc.) execution each embodiment methods described of the present invention whole or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (13)
1. a kind of 100kW level broadband electromagnetical ultrasonic action source is it is characterised in that include：
Signal generator, for generating first group of initial signal and second group of initial signal, wherein, described first group of initial signal
It is opposite polarity signal with described second group of initial signal, in described first group of initial signal, comprise even number initial signal,
Even number initial signal is comprised in described second group of initial signal；
Multi-channel driver circuit, is connected with described signal generator, for by described first group of initial signal and described second group
Initial signal is amplified；
Multi-way switch circuit, described in a road, on-off circuit is connected with drive circuit described in a road, wherein, described variable connector electricity
Road adjusts running status according to the described first group of initial signal after amplifying and described second group of initial signal, wherein, described
Running status includes turning on or turns off；
Frequency selection circuit, described frequency selection circuit is electric with described variable connector respectively by the first end of described frequency selection circuit and the second end
Being connected of road, the output end of described frequency selection circuit is connected with electromagnet ultrasonic changer, and wherein, described frequency selection circuit is according to institute
State running status output echo signal, wherein, described echo signal is used for encouraging described electromagnet ultrasonic changer in structure to be checked
Middle generation ultrasonic wave.
2. 100kW level broadband electromagnetical ultrasonic action source according to claim 1 is it is characterised in that described multichannel drives electricity
Road includes：
First group of drive circuit, is connected with described signal generator, for by the even number in described first group of initial signal
Initial signal is amplified, and obtains first voltage signal group；
Second group of drive circuit, is connected with described signal generator, for by the even number in described second group of initial signal
Initial signal is amplified, and obtains second voltage signal group.
3. 100kW level broadband electromagnetical ultrasonic action source according to claim 2 is it is characterised in that described first group drives
Circuit group includes left arm high-end drive circuit and right arm low-side driver circuitry, and described second group of drive circuit includes left arm low side and drive
Dynamic circuit and right arm high-end drive circuit.
4. 100kW level broadband electromagnetical ultrasonic action source according to claim 2 is it is characterised in that described variable connector is electric
Road includes：
First switch group, is connected with described first group of drive circuit, wherein, when the first end being carried in described first switch group
When meeting the first predeterminated voltage with the magnitude of voltage of the described first voltage signal group at the second end two ends, described first switch conducting
Group；
Second switch group, is connected with described second group of drive circuit, wherein, when the first end being carried in described second switch group
When meeting the second predeterminated voltage with the magnitude of voltage of the described second voltage signal group at the second end two ends, described second switch group is led
Logical.
5. 100kW level broadband electromagnetical according to claim 4 ultrasonic action source is it is characterised in that described first switch group
Including left arm high-end switch and right arm low-end switch, described second switch group includes left arm low-end switch and right arm high-end switch,
Wherein, described left arm high-end switch includes at least one first FET, described right arm low-end switch include at least one
Two FETs, described left arm low-end switch includes at least one the 3rd FET, and described right arm high-end switch is included at least
One the 4th FET.
6. 100kW level broadband electromagnetical according to claim 5 ultrasonic action source is it is characterised in that each described first
The drain electrode of effect pipe connects high voltage, and the source electrode of each described first FET is connected with the left end of described frequency selection circuit；Often
Individual described second FET source ground, the drain electrode of each described second FET is connected with the right-hand member of described frequency selection circuit
Connect；The source ground of each described 3rd FET, the drain electrode of each described 3rd FET and described frequency selection circuit
Left end is connected；The drain electrode of each described 4th FET connects high level, the source electrode of each described 4th FET and institute
The right-hand member stating frequency selection circuit is connected.
7. 100kW level broadband electromagnetical according to claim 5 ultrasonic action source is it is characterised in that described frequency selection circuit bag
Include the first electric capacity and transformer, wherein, the source electrode of the first end of described first electric capacity and each described first FET and often
The drain electrode of individual described 3rd FET is connected, the second end of described first electric capacity and the first end phase of described transformer primary side
Connect, the second end of described transformer primary side is connected with the source electrode of described second FET drain electrode and described 4th FET
Connect, the secondary of described transformer is connected with described electromagnet ultrasonic changer.
8. 100kW level broadband electromagnetical ultrasonic action source according to claim 5 is it is characterised in that also include：
High-voltage power circuit, the first end of described high-voltage power circuit respectively with the drain electrode of each the first FET and described every
The drain electrode of individual 4th FET is connected, the second end ground connection of described high-voltage power circuit, and described power circuit is used for as institute
Stating frequency selection circuit provides high voltage signal.
9. 100kW level broadband electromagnetical ultrasonic action source according to claim 5 is it is characterised in that described multichannel drives electricity
Road Zhong Mei road drive circuit includes：
Digital-to-analogue isolation circuit, is connected with described signal generator, for isolating the digital circuit pair in described signal generator
The interference of the analog circuit in described 100kW level broadband electromagnetical ultrasonic action source；
FET drive circuit, is connected with digital-to-analogue isolation circuit described in a path switching circuit respectively, for being attached thereto
The input output voltage signal of the described path switching circuit connecing, wherein, described voltage signal is used for driving a described road to open
Close circuit on or off.
10. 100kW level broadband electromagnetical ultrasonic action source according to claim 9 is it is characterised in that described 100kW level is wide
Frequency electromagnetic acoustic driving source also includes：
Multiple suppression circuits, a described suppression circuit is connected with a road FET, wherein, the first of described suppression circuit
End is connected with the drain electrode of a described road FET, the source electrode of the second end of described suppression circuit and a described road FET
It is connected.
11. 100kW level broadband electromagneticals according to claim 10 ultrasonic action sources are it is characterised in that the plurality of suppression
In circuit, each suppression circuit includes the second electric capacity, resistance and diode, wherein, described second electric capacity and described Diode series
It is connected in parallel on source electrode and the drain electrode of described FET afterwards, described resistor coupled in parallel is at the two ends of described diode.
12. 100kW level broadband electromagnetical ultrasonic action sources according to claim 8 are it is characterised in that described variable connector is electric
In road, each on-off circuit includes N number of FET, and wherein, in described N number of FET, the grid of each FET is connected
Connect, and be connected with the output end of described FET drive circuit, the drain electrode of each FET described is connected, described every
The source electrode of individual FET is connected, and N is the positive integer more than or equal to 1.
The 13. 100kW level broadband electromagneticals ultrasonic action sources according to any one of claim 1 to 12 are it is characterised in that institute
State signal generator and include field programmable gate array.
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| CN106442742B (en) | 2023-11-03 |
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