CN1053302C - Adjustable wide pulse combined ultrasonic seismic source - Google Patents
Adjustable wide pulse combined ultrasonic seismic source Download PDFInfo
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- CN1053302C CN1053302C CN94103467A CN94103467A CN1053302C CN 1053302 C CN1053302 C CN 1053302C CN 94103467 A CN94103467 A CN 94103467A CN 94103467 A CN94103467 A CN 94103467A CN 1053302 C CN1053302 C CN 1053302C
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Abstract
The invention relates to an ultrasonic seismic source, which is designed for improving emission energy and solving the problem of vibration duration. It is composed of central control, pulse forming, power supply, key and display. The central control part generates several positive and negative pulses simultaneously according to the operation of key, the number, width, interval time and amplitude of the pulses are adjustable and displayed by the display, the pulse forming part combines the positive and negative pulses and outputs them at high voltage, the negative pulse in the combined waveform is used to compensate the ultrasonic residual wave generated by the positive pulse, and the pulse width is adjusted to adapt to transducers with different frequencies. The test has the function of obviously improving the penetrating power and the resolution of the ultrasonic source.
Description
The present invention relates to a kind of millimicro second pulse generator, relate to a kind of ultrasonic wave focus or rather.
The ultrasonic wave focus is a kind of AC energy source device of supplying with electroacoustic type transducer, produce a certain size electrical power of required operating frequency, change the ultrasonic energy of required frequency again into through ultrasonic transducer, ultrasonic vibration source is widely used in the technical fields such as sonar, ultrasonic inspection, ultrasonic measurement and seismic physical model experiment.Usually require ultrasonic vibration source to have strong as far as possible emitted energy and short as far as possible perdurabgility (also claiming repercussions), thereby make ultrasonic vibration source have strong as far as possible penetration power and high as far as possible resolving power.Present ultrasonic vibration source generally adopts single impulse method, its groundwork principle is: by monostable flipflop to millimicrosecond pulse produce circuit provide the rise time less than 10ns soon along trigger impulse, change the zero-time sign of time-base signal output into through emitter follower as microcomputer, the pulse signal that generates the tentering Fixed width adds on the tremendously high frequency high back voltage transistors base stage, its collector electrode adds high pressure and is in the avalanche breakdown operating state, no signal output at ordinary times, when soon when trigger impulse arrives, the instantaneous conducting of triode, the load capacitance repid discharge, form polarity and be negative burst pulse output, adjust load resistance and load capacitance and can adjust base magnitude and pulse amplitude within the specific limits, and bottom width is narrow more, amplitude is low more.
Because the restriction of the intrinsic vibrant characteristic of electroacoustic transducer wafer and the manufacture craft of being popped one's head in, make focus with above-mentioned single burst pulse, all can not satisfy the requirement of above-mentioned science and technology field aspect perdurabgility two in emitted energy and vibrations, address this problem common employing and grab the technology at two, a kind of is to select high-quality ultrasonic transducer, improve its performance to satisfy specification requirement as far as possible, another kind is to start with from the pulse signal that is added on the ultrasonic transducer, makes it improve emitted energy and minimizing ultrasonic wave repercussions.
The objective of the invention is to solve the problem of ultrasonic vibration source emitted energy and repercussions aspect, from being added in pulse signal on the ultrasonic transducer a kind of adjustable broad pulse combined ultrasonic vibration source of design of starting with for improving the penetration power and the resolving power of ultrasonic dark head.
Basic principle of the present invention is: design and a kind ofly can produce the pulse generator of several positive and negative pulses simultaneously, the pulse number of each pulse is adjustable, and width-adjustable, the amplitude of each pulse is adjustable, interpulse period is adjustable; To these several positive and negative pulse make up by certain mode and high pressure output after add on the ultrasonic transducer again, go compensation (or counteracting) by the ultrasonic wave repercussions that positive pulse signal produces with the undersuing in the combined waveform, adjust the needs that pulse duration can adapt to the different frequency electroacoustic transducer.Because, increase with pulse duration in certain width scope self-energy, thereby widened pulse can obviously improve the energy of ultrasonic vibration source, significantly strengthen the ultrasonic wave penetration power, reach the purpose of control ultrasonic wave penetration power simultaneously by pulsewidth; When several widened pulses were pressed the certain way combination, the output response of electroacoustic transducer also was the result of several widened pulse response stacks, so that the basic neutralisation repercussions.
Adjustable broad pulse combined ultrasonic seismic wave of the present invention, form by central control section, pulse shaping part, button and display part, power unit four big functional parts, the pulse number S1-Sn that the information Control pulse shaping part output simultaneously that central authorities' control section provides according to one group of button requires controls the information that display part display button group provides simultaneously; The pulse shaping part is exported positive and negative alternate high-voltage pulse according to the information combination that central control section provides; Button and display part provide control information for central control section, the pulse repetition frequency when still being internal trigger mode, internal trigger etc. as blanking time, the external trigger mode of pulse and pulse in the number, each pulse of output pulse, and show above information; Power unit provides working power for its excess-three functional part, it is characterized in that: described central control section comprises minimum Single Chip Microcomputer (SCM) system and imports the shaping circuit of external trigger pulse to the singlechip interruption end, single-chip microcomputer n I/O end can be exported n S0 " Sn " pulse simultaneously respectively, and described key groups is connected with the I/O end and the data D end of single-chip microcomputer; Described pulse shaping partly comprises pulse duration and the fine tuning blanking time circuit of n S0 " Sn ", generates S1-Sn pulse and the S1-Sn that generates is carried out the impulse sender that sets of waveforms merges high pressure output.
S1-Sn pulse number, interpulse period and repetition rate etc. that the present invention is generated by Single Chip Microcomputer (SCM) program control, make it to remain in the scope, promptly finish coarse adjustment, each road fine tuning circuit paired pulses blanking time and repetition rate by S1-Sn are carried out fine tuning, finally finish the adjusting of assembled pulse waveform.
Further specify technology of the present invention below in conjunction with embodiment and accompanying drawing thereof
The central control section of present embodiment can generate six pulse signals simultaneously, six pulses can same starting point, also can different starting points, shown in Fig. 1-1 S1 '-S6 ', as required, six pulses to six can be exported by the combination in any high pressure, shown in Fig. 1-2, the assembled pulse signal amplitude is adjustable continuously from 0-400V, and pulse duration is adjustable continuously from 150ns-4 μ s, and interpulse period is adjustable continuously from 200ns-20 μ s.
Fig. 1-1, S1 '-S6 ' enforcement waveform schematic diagram
Fig. 1-2, the high pressure assembled pulse is implemented the waveform schematic diagram
Fig. 2, the frame principle figure of adjustable broad pulse combined ultrasonic vibration source
Fig. 3, the enforcement circuit diagram of central control section among Fig. 1
Fig. 4-1, embodiment 1 circuit diagram of pulse shaping part among Fig. 1
Fig. 4-2, embodiment 2 circuit diagrams of pulse shaping part among Fig. 1
Fig. 5, the enforcement circuit diagram of button and display part among Fig. 1
Fig. 6-1, Fig. 6-2 is respectively the pulsewidth of pulse shaping part among Fig. 4-1, Fig. 4-2 and the working waveform figure of fine tuning blanking time circuit.
Fig. 7, one of adjustable broad pulse combined ultrasonic vibration source work main flow chart
Fig. 8, two of adjustable broad pulse combined ultrasonic vibration source work main flow chart
Fig. 9, three of adjustable broad pulse combined ultrasonic vibration source work main flow chart
Referring to Fig. 2, adjustable broad pulse combined ultrasonic vibration source is by power unit 10, center-control Part 20, button and display part 30, high pressure assembled pulse forming section 40 form. Power supply Part 10 provides two groups+5V, one group+12V and positive and negative 400V high pressure. The center-control part 20 can export six pulse signals of S1-S6 simultaneously, also can only export one of them or 2-5 arteries and veins Rush signal, but between positive and negative pulsion phase. The middle broken ends of fractured bone input external trigger signal EXT of single-chip microcomputer-TR1G, synchronization output signal SYNC is by an one I/O end output. Operation push-button part 30 One group of button can be controlled the interval between number, pulse and the pulse of exporting pulse S1-S6 (coarse adjustment), external trigger or internal trigger are selected, the repetition rate during internal trigger, center-control section Divide 20 according to key information control high pressure assembled pulse forming section 40, and the control display button The information that group provides, the positive and negative alternate height that is required by 40 outputs of pulse shaping part at last Press assembled pulse.
Figure 3 shows that the implementing circuit of center-control part 20, comprise by the little processing of IC1 monolithic The minimum monolithic that device 8031, IC2 data latches 74LS373 and IC3 memory 2764 consist of The machine system carries out shaping to external trigger pulse and gets its trailing edge as singlechip interruption input letter Number IC4 monostable flipflop 74LS123, the button SW1 that is connected with single-chip microcomputer P17, P16, SW2 is respectively applied to select inside and outside triggering mode and paired pulses blanking time, pulse width to advance The row coarse adjustment, the IC5-1 that is connected with single-chip microcomputer P10-P15 ... the IC5-6 hex inverter is with monolithic Six pulse signal S1 '-S6 ' that machine is exported simultaneously send respectively six photoelectrical couplers T1L117, the S0 " Sn " of photoelectric coupling output send Fig. 4-1 or Fig. 4-2 pulse shaping circuit Same Name of Ends, the purpose that adopts photoisolator is for increasing the antijamming capability of circuit. Figure Middle decoder IC6 deciphers address A5, A6, A7, and output Y1-Y8 signal is to Fig. 5's Button and display circuit. S1 " synchronously SYNC signal output of signal and conduct, data-signal D0-D7 and read-write WR, RD send button and the display circuit of Fig. 5.
Enforcement circuit for high pressure assembled pulse formation part 40 shown in Fig. 4-1 comprises six groups of pulsewidths that are connected with S1 " S6 " respectively, time interval fine tuning circuit and pulse combined high pressure radiating circuits.Every group of pulsewidth, time interval fine tuning circuit are made of two-stage monostable flipflop IC7, IC8 and the anti-phase shaping circuit IC9 serial connection of Schmidt, and its work wave can be referring to Fig. 6-1, but the width T1 of levelling R1, each pulse of R4 fine tuning and blanking time T2.Because of the fine tuning circuit of one group of (S1) pulse that only draws in the length finite graph, six group pulse S1-S6 after the levelling send impulse sender IC10, carry out amplitude adjusted, high pressure, array output.The outer meeting resistance R5-R10 of impulse sender IC10 is respectively applied for the pulse amplitude of adjusting S1-S6 among the figure.
Fig. 4-2 is depicted as another enforcement circuit that the high pressure assembled pulse forms part 40, also comprise six groups of pulsewidths that are connected with S1 " S6 " respectively, time interval fine tuning circuit and pulse combined high pressure radiating circuits, every group of pulsewidth, time interval fine tuning circuit are by monostable flipflop IC7, IC7 ', IC8, shaping NAND gate IC9, the anti-phase shaping circuit IC7 ' of Schmidt, IC8 ' connect and compose.As space is limited, only draw among the figure one group be S1 " regulating circuit, all the other circuit structures of five groups are identical with it, the pulse signal that six degree of having a lot of social connections are adjustable, interpulse period is adjustable of shaping NAND gate IC9 output carries out combined high pressure output in IC10.
The work wave of regulating circuit can " being input pulse waveform, IC7Q, IC7 ' Q, IC8Q, IC7 ", IC8 ', IC9 be respectively IC7Q end, IC7 ' Q end, IC8Q end, IC7 " output, IC8 ' output and IC9 output waveform referring to Fig. 6-2, S.R1, R2 are used to regulate the pulse duration of IC7Q, and fine tuning interpulse period, IC2 ' Q pulsewidth is fixed, and R4, R5 are used to regulate the pulse duration of IC8Q, and by the pulse of IC9 output, T1 is adjustable for its width, and its blanking time, T2 was adjustable.Fig. 4-1, Fig. 4-2 embodiment, pulse duration is adjustable continuously from 150ns-4 μ s, and interpulse period is adjustable continuously from 200ns-20 μ s.
Figure 5 shows that the enforcement circuit of button and display part 30, one group of button SW3-SW6 and data latches IC11, provide the key groups order by data terminal D0-D7 to single-chip microcomputer IC1, data latches IC12 and one group of LED luminous tube L1-L8 read the shows signal that single-chip microcomputer is exported by data terminal D0-D8, be used to show energized as L1, L2 shows inside and outside triggering mode, and L3-L8 is respectively applied for and shows current S1-S6 pulse.Data latches IC14, IC15, IC16 and charactron SMG1-SMG3 thereof are used to show the repetition rate (ms) and the interpulse period (us) of pulse, NOR gate IC13-1 ... IC13-5 is used for the Y1-Y5 of input is made up the chip selection signal that generates IC14, IC12, IC16, IC15 and IC11.
Fig. 7-Figure 9 shows that the work main flow chart of this widened pulse combined ultrasonic vibration source embodiment, wherein Fig. 7 has illustrated that in more detail each button of SW1, SW3-SW6 is to the compound mode of strobe pulse number, S1-S6, the pulsewidth of adjustment S1-S6, the effect when adjusting S1-S6 interpulse period and controlling each function of inside and outside triggering.
SW1 is a toggle switch, stir the position for two and represent to work in internal trigger mode or external trigger mode respectively, be the internal trigger working method during SW1=1, single-chip microcomputer is pressed the certain hour circulation and is produced impulse wave, and software is adjusted the blanking time and the repetition rate of pulse number, pulse and pulse.Be the external trigger working method during SW1=0, the generation of single-chip microcomputer pulse signal is subjected to the control of external trigger signal, opens interruption, checks the state of SW1 simultaneously and waits for that the pass interrupts returning when SW1 reverts to 1 again.
SW3-SW6 is key switch, wherein SW3 is used to adjust pulse number, SW3 of every operation, single-chip microcomputer I parameter adds 1, I from 0 to 6 increases progressively by adding 1, return I=0 when I=6, the I parameter was respectively 0,1,2,3,4,5 o'clock, corresponding six kinds of waveform combination mode MCFS0-MCFS5 (referring to Fig. 8).
When SW1=1, SW3=0, SW4 of every operation, single-chip microcomputer J parameter increases progressively by adding 1, returns J=1 when J=60, and the J parameter is used to adjust repetition rate.
When SW1=1, SW3=0, SW4=0, SW5 of every operation, single-chip microcomputer K parameter is successively decreased by subtracting 1, when SW5=0, SW6 of every operation, single-chip microcomputer K parameter increases progressively by adding 1.The K parameter is used to adjust the pulse and the interpulse time interval.
SW2 is a key switch also, is used to select single, double pulse, and when SW2=0, for producing dipulse, promptly positive and negative alternate pulse according to the value of single-chip microcomputer I parameter, is selected different waveform combination mode MCFS0-MCFS5 at this moment.When SW2=1, for producing pulse, promptly the odd number negative pulse at this moment according to the value 1,3,5 of single-chip microcomputer I, is selected waveform combination mode MCFS1, MCFS3 and MCFS5, as shown in Figure 8
Figure 9 shows that interrupt service routine (ZDFW), its operation principle illustrates that with Fig. 8 RETI is interrupt latency.
In Fig. 8, Fig. 9 flow process, the situation of I＞5 has been done processing, I＞5 explanations have error signal to exist, and then transfer to automatically and carry out MCFSO.
Adjustable broad pulse combined ultrasonic vibration source embodiment of the present invention, through in the seismic physical model experiment, using, ultrasonic probe for 200KHz, compare under the identical pulse amplitude conditions with U.S. 5055PR type equipment, ultrasonic energy can improve 6 times, ultrasonic signal for 2 cycles of commplementary wave length can compensate to ripple half, therefore with adjustable wide positive and negative assembled pulse of the present invention as ultrasonic vibration source than prior art with single polar impulse as ultrasonic vibration source, for the penetration power and the resolving power that improve ultrasonic probe fairly obvious effect is arranged.
Claims (5)
1, a kind of adjustable broad pulse combined ultrasonic vibration source, comprise in the internal trigger mode or receive external trigger and interrupt input signal, it is just individual to generate S1 " Sn " simultaneously, the central control section of undersuing, S1 " Sn " is just individual, the negative pulse combination generates the pulse shaping part of high pressure assembled pulse output, to central control section input control information, control is just generating, the negative pulse number, interpulse period, the inside/outside triggering mode, one group of button of internal trigger pulse repetition frequency, be connected with central control section data terminal, be used for the display and the power unit of display control information, it is characterized in that:
Described central control section comprises the minimum Single Chip Microcomputer (SCM) system be made up of single-chip microcomputer, data latches, memory and to the shaping circuit of singlechip interruption end input external trigger pulse, the individual positive and negative pulse signal of described S1 " Sn " is exported by n I/O end of single-chip microcomputer simultaneously;
Described key groups is connected with the I/O end and the data D end of single-chip microcomputer;
Described pulse shaping partly comprises carries out pulse duration and fine tuning blanking time to S1 " Sn ", exports n the regulating circuit of S1-Sn respectively and S1-Sn is carried out sets of waveforms to merge the impulse sender that high pressure is exported.
2, adjustable broad pulse combined ultrasonic vibration source according to claim 1, it is characterized in that described regulating circuit is connected in series the anti-phase shaping circuits of Schmidt by 2 groups of monostable flipflops and forms, input pulse connects the rising edge trigger end of first order monostable flipflop, the 1st grade of monostable flipflop Q end is connected with the trailing edge trigger end of second level monostable flipflop, and monostable flipflop Q end in the second level is connected with the anti-phase shaping circuit input of Schmidt.
3, adjustable broad pulse combined ultrasonic vibration source according to claim 1, it is characterized in that described regulating circuit connects the anti-phase shaping circuit of Schmidt by 3 grades of monostable flipflops and the shaping NAND circuit constitutes, input pulse connects the rising edge trigger end of first order monostable flipflop, monostable flipflop Q end in the second level is connected with the trailing edge trigger end of second level monostable flipflop and third level monostable flipflop, the Q end of second level monostable flipflop connects an input of shaping NAND circuit through the anti-phase shaping circuit of Schmidt, anti-another input that connects the shaping NAND circuit through schmidt shaping circuit of holding of the Q of third level monostable flipflop, shaping NAND circuit output regulating impulse.
4, adjustable broad pulse combined ultrasonic vibration source according to claim 1 is characterized in that described n is 6, and described S1-Sn positive and negative pulse is three positive pulses, three negative pulses.
5, adjustable broad pulse combined ultrasonic vibration source according to claim 1, it is characterized in that described key groups comprise be connected with described single-chip processor i/o end in, external trigger working mode selection switch SW 1 and single, dipulse selector switch SW2, key switch SW3 by single-chip microcomputer I parameter adjustment pulse number, key switch SW4 by single-chip microcomputer J parameter adjustment pulse repetition frequency, make single-chip microcomputer K parameter by adding the 1 key switch SW6 that increases progressively and making single-chip microcomputer K parameter by subtracting the 1 key switch SW5 that successively decreases, described SW3-SW6 one termination high potential, the other end connects the data terminal of a data latches respectively, and the data latches output is order sheet machine data end respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103467A CN1053302C (en) | 1994-04-08 | 1994-04-08 | Adjustable wide pulse combined ultrasonic seismic source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103467A CN1053302C (en) | 1994-04-08 | 1994-04-08 | Adjustable wide pulse combined ultrasonic seismic source |
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| CN1110440A CN1110440A (en) | 1995-10-18 |
| CN1053302C true CN1053302C (en) | 2000-06-07 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1626487B1 (en) * | 2003-05-22 | 2012-02-01 | TDK-Lambda Corporation | Pulse generator |
| CN102185591A (en) * | 2011-03-01 | 2011-09-14 | 株洲南车时代电气股份有限公司 | Gate pulse generation device for testing power device of current transformation module |
| US10527592B2 (en) * | 2015-09-16 | 2020-01-07 | Samsung Medison Co., Ltd. | Ultrasonic probe, ultrasonic imaging apparatus including the same, and method for controlling the ultrasonic imaging apparatus |
| CN112526600B (en) * | 2019-09-19 | 2023-12-12 | 中国石油化工股份有限公司 | Amplitude compensation method and system for sweep frequency ultrasonic excitation signal |
| CN111650551B (en) * | 2020-03-24 | 2022-05-17 | 海洋石油工程股份有限公司 | Broadband underwater acoustic signal energy equalization method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87217183U (en) * | 1987-12-29 | 1988-11-09 | 河南省科学院科研器材厂 | Low-voltage power supply pulse supersonic wave generator |
| CN2032102U (en) * | 1987-09-10 | 1989-02-08 | 汕头市光电研究所 | Supersonic music fountain |
| CN1037683A (en) * | 1988-05-18 | 1989-12-06 | 沃尔夫冈·普里斯穆特 | The electric lighting lamp that is used for car compartment |
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1994
- 1994-04-08 CN CN94103467A patent/CN1053302C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032102U (en) * | 1987-09-10 | 1989-02-08 | 汕头市光电研究所 | Supersonic music fountain |
| CN87217183U (en) * | 1987-12-29 | 1988-11-09 | 河南省科学院科研器材厂 | Low-voltage power supply pulse supersonic wave generator |
| CN1037683A (en) * | 1988-05-18 | 1989-12-06 | 沃尔夫冈·普里斯穆特 | The electric lighting lamp that is used for car compartment |
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