CN102890928A - Electromagnetic pulse sound source - Google Patents
Electromagnetic pulse sound source Download PDFInfo
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- CN102890928A CN102890928A CN2011102014382A CN201110201438A CN102890928A CN 102890928 A CN102890928 A CN 102890928A CN 2011102014382 A CN2011102014382 A CN 2011102014382A CN 201110201438 A CN201110201438 A CN 201110201438A CN 102890928 A CN102890928 A CN 102890928A
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Abstract
The invention relates to an electromagnetic pulse sound source. The pulse sound source comprises a pulse sound source shell (1), and the pulse sound source also comprises a pulse capacitor (2), a triggering system, a transmitting unit (4), a first constant current type charging power supply (5), a second constant current type charging power supply (6) and a control circuit (7) which are all arranged in the pulse sound source shell (1). The control circuit (7) and a triggering control module are connected with the first constant current type charging power supply (5). The triggering system is connected with an inductive coil (61) of the transmitting unit (4) through a vacuum triggering pipe (3). The electromagnetic pulse sound source has the advantages that the working voltage of the pulse sound source is high; the discharging current is big; the sound source level is high and can reach above 240 decibels when single sound source works; and because of a communication system based on site, the working parameter of the sound source can be set and obtained at any time.
Description
Technical field
The present invention relates to the Pulse Power Techniques field, particularly, the present invention relates to a kind of electromagnetic pulse sound source.
Background technology
The principle of thumper is that high voltage energy-storage capacitor discharges by telefault, and the metal vibration diaphragm induction that covers on the coil is generated an electromagnetic field, and vibrating diaphragm magnetic field and coil magnetic field interact and produce repulsive force, excite surrounding medium to form sound wave.Compare with other sound source, thumper has following characteristics: the sound pulse characteristic of (1) sound source institute radiation, depend primarily on the electroacoustic structure of sound source itself, the sound pulse waveform of radiation is very regular, have splendid wideband spectrum structure, and can change easily as requested surge pressure and the width of sound pulse; (2) safe and reliable, the signal favorable repeatability can be used as the broadband sound source in the fields such as research of hydroacoustic physics experiment, geologic prospecting and nonlinear acoustics.
Electromagnetic pulse sound source partly is comprised of storage capacitor, switch, transmitting coil etc. usually.List of references has: the patentee is Hua Lesun, Hu Jiazhong, and number of patent application is 85100714 electromagnetic pulse transducer.Patent 85100714 has proposed a kind of new design method for the low problem of electromagnetic type pulse transduce electro-acoustic conversion efficiency in the little energy excitation situation, can improve electro-acoustic conversion efficiency, and sound source level reaches 107 decibels.
Patent 85100714 described methods for designing are confined to the situation of little energy excitation transducer, and are also inapplicable for the situation of macro-energy excitation transducer; Sound source level is low, only has 107 decibels, has greatly limited the usable range of electromagnetic pulse sound source; Control mode is simple, not supporting bus communication.
Summary of the invention
The object of the present invention is to provide a kind of electromagnetic pulse sound source.
According to electromagnetic pulse sound source of the present invention, this pulse sound source comprises pulse sound source shell 1, it is characterized in that, described pulse sound source also comprises pulsed capacitance 2, triggering system, transmitter unit 4, the first constant current mode charge power supply 5, the second constant current mode charge power supply 6 and control circuit 7;
Described triggering system comprises triggered vacuum gap 3 and trigger control module, and described trigger control module comprises MOSFET, electric capacity N and transformer 1; The grid of described MOSFET connects the driving chip, the primary coil of the source electrode connection transformer 1 of MOSFET, and the drain electrode of MOSFET connects electric capacity N one end, and the other end of electric capacity N is connected with the primary coil of transformer 1; One end of the secondary coil of described transformer 1 is connected with the trigger end A of triggered vacuum gap 2, and the other end is connected with the negative electrode B of triggered vacuum gap 2 and ground connection; The anode D of described triggered vacuum gap 2 is connected to pulsed capacitance 2, and this pulsed capacitance 2 is connected with the second constant current mode charge power supply 6, is used for the charging of paired pulses electric capacity 2;
Described transmitter unit 4 comprises a transducer, this transducer comprises vibrating plate 45, telefault 61, base 47 and shell 48, described telefault 61 adopts planar metal plate to carry out Wire EDM and forms, and para tape 14 fillings are adopted in the space between the telefault 61; Described telefault 61 and vibrating plate 45 be coaxial to be embedded at after bonding in the groove that shell 48 forms, and after fastening sealing with base 47, pours into by epoxy glue to be integrated;
Described control circuit 7 is connected with the first constant current mode charge power supply 5 with trigger control module, and described triggering system is connected with the telefault 61 of transmitter unit 4 by triggered vacuum gap 3.
According to electromagnetic pulse sound source device of the present invention, described control circuit 7 comprises that a single-chip microcomputer, CAN bus chip, MOSFET drive chip, high LVPS drives chip, electric capacity and at least 1 MOSFET;
The CAN bus interface of described single-chip microcomputer is connected with described computing machine by the CAN bus chip, is used for the steering order that receiving computer sends;
The input of described single-chip microcomputer, output port connect the input port that high LVPS drives chip, and the output port that described high LVPS drives chip connects some relays, is used for the charging of control capacitance N and external pulse electric capacity;
Described single-chip microcomputer input, output port connect the input port that MOSFET drives chip, described MOSFET drives the grid of the output port connection MOSFET of chip, the drain electrode of described MOSFET meets electric capacity N, source ground is used for control capacitance N and realizes the discharge of external pulse electric capacity by transformer.
According to electromagnetic pulse sound source device of the present invention, control circuit 7 also comprises a protection circuit, this protection circuit is arranged between CAN bus and the computing machine, comprise that three the tunnel are arranged in parallel at the Transient Suppression Diode of two series connection at the two ends of CAN bus, anti-thunder tube and another anti-thunder tube of two series connection, wherein, ground connection between the Transient Suppression Diode of two series connection, ground connection between the anti-thunder tube of two series connection is used for eliminating the strong-electromagnetic field of discharge moment generation to destruction and the interference of control circuit chips.
According to electromagnetic pulse sound source device of the present invention, the withstand voltage of described triggered vacuum gap 2 is 5～10KV, and the withstand voltage of described MOSFET is 500V.
According to electromagnetic pulse sound source device of the present invention, in the transducer of described transmitter unit 4;
Be coaxially arranged with insulating mat 44 between described telefault 61 and the vibrating plate 5;
The round gasket 43 of the top covering of described vibrating plate 45 and shell 48 couplings, sealing pad 43 is fixed between pressure ring 41 and the shell 48 by bolt 42;
Be arranged with insulated terminal 49 on the described electrode 13;
Described vibrating plate 45 adopts the sheet metal of lightweight high conductivities, comprises being selected from aluminium alloy, titanium alloy and the magnalium any;
Described shell 48 adopts permeability magnetic material;
The consistency of thickness of the thickness of described para tape 14 and telefault 61 is 6～8mm;
The material of described planar metal plate comprises any that is selected from copper, aluminium, aluminium alloy, titanium alloy and magnalium;
The flatness of described planar metal plate≤0.01.
According to electromagnetic pulse sound source device of the present invention, described pulse sound source shell 1 comprises sound source shell front panel 8, sound source housing main body 9, sound source shell rear panel 10, be bolted between sound source shell front panel 8, the outer rear panel 10 of sound source and the sound source housing main body 9, on the sound source housing main body 9 sealing strip mounting groove arranged;
Described pulsed capacitance 2 is arranged at the bottom of housing main body; Triggered vacuum gap 3 is arranged at the top of housing main body, be positioned at pulsed capacitance directly over.
Electromagnetic pulse sound source control method of the present invention may further comprise the steps:
Charge by control circuit 7 first constant current mode charge power supplies 5 paired pulses electric capacity 2, the control trigger control module triggered triggered vacuum gap 3 conductings after charging was finished, pulsed capacitance pulsed capacitance 2 discharges to telefault 61 by triggered vacuum gap 3, promote the sheet metal surface of emission away from telefault 61, produce the pulse sound signal.
According to the control method of electromagnetic pulse sound source device of the present invention, the method that described trigger control module triggers triggered vacuum gap 3 conductings is:
After control circuit 7 sent instruction, by an output port output high level of the single-chip microcomputer in the circuit, and the high voltage of rear drive chip output made the MOSFET conducting, and primary return is connected, and produces high voltage in the secondary loop, impels triggered vacuum gap 3 conductings.
According to the control method of electromagnetic pulse sound source device of the present invention, described control circuit 7 control methods are:
1) after described single-chip microcomputer receives the instruction of the low-voltage charging that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, and drive the chip controls LVPS by the high LVPS that is electrically connected with single-chip microcomputer electric capacity N is charged, after single-chip microcomputer receives the instruction that low-voltage that computing machine sends stops to charge, stop electric capacity N is charged;
2) after described single-chip microcomputer receives the instruction of the high-voltage charge that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, and high LVPS driving chip controls circuit external high voltage power supply paired pulses electric capacity 2 chargings by being electrically connected with single-chip microcomputer, after single-chip microcomputer receives the instruction that high voltage that computing machine sends stops to charge, stop the paired pulses capacitor charging;
3) after described single-chip microcomputer receives the transmission instruction that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, the MOSFET that is electrically connected with single-chip microcomputer drives chip controls MOSFET conducting, after the MOSFET conducting, the electric capacity N that is attached thereto discharges by transformer, and then at secondary coil generation high voltage, conducting triggered vacuum gap 3 impels 2 discharges of external pulse electric capacity.
The invention has the advantages that, the pulse sound source operating voltage is high, and discharge current is large, and sound source level is high during single sound source work, can reach more than 240 decibels; Fieldbus Based communication system is arranged, can set at any time and obtain the running parameter of sound source.
Description of drawings
Fig. 1 is the composition structural drawing of pulse sound source;
Fig. 2 is the pulse sound source outer casing construction drawing;
Fig. 3 is the transmitter unit side view;
Fig. 4 is the transmitter unit front elevation;
Fig. 5 is the transmitting coil front elevation;
Fig. 6 is the transmitting coil side view;
Fig. 7 is trigger circuit schematic diagram of the present invention;
Fig. 8 is the structural representation of the control system for the great-power electromagnetic pulse sound source of the present invention;
Fig. 9 is the protection circuit figure of control system of the present invention;
Figure 10 is the fundamental diagram of Sing plus sound source.
The accompanying drawing sign:
1, pulse sound source shell 2, pulsed capacitance 3, triggered vacuum gap
4, transmitter unit 5, the first constant current mode charge power supply 1
6, the second constant current mode charge power supply 7, control circuit
8, sound source shell front panel 9, sound source housing main body
10, sound source shell rear panel 11, sealing strip mounting groove
13, electrode 14, para tape 15, vibrating diaphragm
41, pressure ring 42, bolt 43, sealing gasket
44, insulating mat 45, vibrating plate 61, telefault
47, base 48, shell 49, insulated terminal
31, transformer 32, triggered vacuum gap A, trigger end
B, negative electrode D, anode N, electric capacity
C、MOSFET
Embodiment
Below in conjunction with accompanying drawing electromagnetic pulse sound source of the present invention is further detailed.
Sound source comprises pulse sound source shell 1 as described in Figure 1, pulsed capacitance 2, triggering system, transmitter unit 4, the first constant current mode charge power supply 5, the second constant current mode charge power supply 6 and control circuit 7;
Described pulse sound source shell 1 comprises sound source shell front panel 8, sound source housing main body 9, sound source shell rear panel 10, be bolted between sound source shell front panel 8, the outer rear panel 10 of sound source and the sound source housing main body 9, sealing strip mounting groove 11 is arranged on the sound source housing main body; Pulsed capacitance 2 profiles are rectangular parallelepiped, are fixed on the bottom of housing main body; Triggered vacuum gap 3 is fixed on the top of sound source housing main body 9, be positioned at pulsed capacitance directly over;
As shown in Figure 7, described triggering system comprises triggered vacuum gap 3 and trigger control module, and described trigger control module comprises MOSFET, electric capacity N and transformer 1; The grid of described MOSFET connects the driving chip, the primary coil of the source electrode connection transformer 1 of MOSFET, and the drain electrode of MOSFET connects electric capacity N one end, and the other end of electric capacity N is connected with the primary coil of transformer 1; One end of the secondary coil of described transformer 1 is connected with the trigger end A of triggered vacuum gap 2, and the other end is connected with the negative electrode B of triggered vacuum gap 2 and ground connection; The anode D of described triggered vacuum gap 2 is connected to pulsed capacitance 2, and this pulsed capacitance 2 is connected with the first constant current mode charge power supply 5, is used for the charging of paired pulses electric capacity 2;
As described in Fig. 3～6, described transmitter unit 4 comprises a transducer, this transducer comprises vibrating plate 45, telefault 61, base 47 and shell 48, and described telefault 61 adopts planar metal plate to carry out Wire EDM and forms, and para tape 14 fillings are adopted in the space between the telefault 61; Described telefault 61 and vibrating plate 45 be coaxial to be embedded at after bonding in the groove that shell 48 forms, and after fastening sealing with base 47, pours into by epoxy glue to be integrated; In the transducer of described transmitter unit 4; Be coaxially arranged with insulating mat 44 between described telefault 61 and the vibrating plate 5; The round gasket 43 of the top covering of described vibrating plate 45 and shell 48 couplings, sealing pad 43 is fixed between pressure ring 41 and the shell 48 by bolt 42; Be arranged with insulated terminal 49 on the described electrode 13; Described vibrating plate 45 adopts the sheet metal of lightweight high conductivities, comprises being selected from aluminium alloy, titanium alloy and the magnalium any; Described shell 48 adopts permeability magnetic material; The consistency of thickness of the thickness of described para tape 14 and telefault 61 is 6～8mm; The material of described planar metal plate comprises any that is selected from copper, aluminium, aluminium alloy, titanium alloy and magnalium; The flatness of described planar metal plate≤0.01.
As shown in Figure 8, described control circuit 7 is connected with the first constant current mode charge power supply 5 with trigger control module, and described triggering system is connected with the telefault 61 of transmitter unit 4 by triggered vacuum gap 3.Described control circuit 7 comprises that a single-chip microcomputer, CAN bus chip, MOSFET drive chip, high LVPS drives chip, electric capacity and at least 1 MOSFET; The CAN bus interface of described single-chip microcomputer is connected with described computing machine by the CAN bus chip, is used for the steering order that receiving computer sends; The input of described single-chip microcomputer, output port connect the input port that high LVPS drives chip, and the output port that described high LVPS drives chip connects some relays, is used for the charging of control capacitance N and external pulse electric capacity; Described single-chip microcomputer input, output port connect the input port that MOSFET drives chip, described MOSFET drives the grid of the output port connection MOSFET of chip, the drain electrode of described MOSFET meets electric capacity N, source ground is used for control capacitance N and realizes the discharge of external pulse electric capacity by transformer.
As described in Figure 9, described control circuit 7 also comprises a protection circuit, this protection circuit is arranged between CAN bus and the computing machine, comprise that three the tunnel are arranged in parallel at the Transient Suppression Diode of two series connection at the two ends of CAN bus, anti-thunder tube and another anti-thunder tube of two series connection, wherein, ground connection between the Transient Suppression Diode of two series connection, ground connection between the anti-thunder tube of two series connection is used for eliminating the strong-electromagnetic field of discharge moment generation to destruction and the interference of control circuit chips.
Control method of the present invention is:
1) after described single-chip microcomputer receives the instruction of the low-voltage charging that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, and drive the chip controls LVPS by the high LVPS that is electrically connected with single-chip microcomputer electric capacity N is charged, after single-chip microcomputer receives the instruction that low-voltage that computing machine sends stops to charge, stop electric capacity N is charged;
2) after described single-chip microcomputer receives the instruction of the high-voltage charge that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, and high LVPS driving chip controls circuit external high voltage power supply paired pulses electric capacity 2 chargings by being electrically connected with single-chip microcomputer, after single-chip microcomputer receives the instruction that high voltage that computing machine sends stops to charge, stop the paired pulses capacitor charging;
3) after described single-chip microcomputer receives the transmission instruction that computing machine sends by the CAN bus, the input/output port of single-chip microcomputer is opened, the MOSFET that is electrically connected with single-chip microcomputer drives chip controls MOSFET conducting, after the MOSFET conducting, primary return is connected, and produces high voltage in the secondary loop, impels triggered vacuum gap 3 conductings, after triggered vacuum gap 3 conductings, impel 2 discharges of external pulse electric capacity.
1) host computer sends charging instruction by the CAN bus to the control single chip computer in the pulse sound source;
2) control single chip computer is opened the constant current mode charge power supply, and constant current mode charge power supply paired pulses electric capacity charges;
3) control single chip computer obtains the charge condition of pulsed capacitance by sample circuit, and current charging voltage is fed back to host computer;
4) when the pulsed capacitance charging voltage reaches requirement, control single chip computer is closed the constant current mode charge power supply, stops to charge to pulsed capacitance;
5) host computer sends firing order by the CAN bus to control single chip computer, control single chip computer control triggered vacuum gap trigger circuit produce trigger pip, the triggered vacuum gap conducting, pulsed capacitance discharges to transmitting coil by triggered vacuum gap, promote the sheet metal surface of emission away from transmitting coil, produce the pulse sound signal.
Claims (6)
1. electromagnetic pulse sound source, this pulse sound source comprises pulse sound source shell (1), it is characterized in that, described pulse sound source also comprises pulsed capacitance (2), triggering system, transmitter unit (4), the first constant current mode charge power supply (5), the second constant current mode charge power supply (6) and the control circuit (7) that is arranged in the pulse sound source shell (1);
Described triggering system comprises triggered vacuum gap (3) and trigger control module, described trigger control module comprises MOSFET (C), electric capacity (N) and transformer (1), the grid of described MOSFET (C) connects the driving chip, the primary coil of the source electrode connection transformer (1) of MOSFET (C), the drain electrode of MOSFET (C) connects electric capacity (N) end, and the other end of electric capacity (N) is connected with the primary coil of transformer (1); One end of the secondary coil of described transformer (1) is connected with the trigger end (A) of triggered vacuum gap (2), and the other end is connected with the negative electrode (B) of triggered vacuum gap (2) and ground connection; The anode (D) of described triggered vacuum gap (2) is connected to pulsed capacitance (2), and this pulsed capacitance (2) is connected with the second constant current mode charge power supply (6), is used for the charging of paired pulses electric capacity (2);
Described transmitter unit (4) comprises a transducer, this transducer comprises vibrating plate (45), telefault (61), base (47) and shell (48), described telefault (61) adopts planar metal plate to carry out Wire EDM and forms, and para tape (14) filling is adopted in the space between the telefault (61); Described telefault (61) and vibrating plate (45) be coaxial to be embedded at after bonding in the groove that shell (48) forms, and after fastening sealing with base (47), pours into by epoxy glue to be integrated;
Described control circuit (7) is connected with the first constant current mode charge power supply (5) with trigger control module, and described triggering system is connected with the telefault (61) of transmitter unit (4) by triggered vacuum gap (3).
2. electromagnetic pulse sound source according to claim 1, it is characterized in that, described control circuit (7) comprises that a single-chip microcomputer, CAN bus chip, MOSFET drive chip, high LVPS drives chip, electric capacity and at least 1 MOSFET (C);
The CAN bus interface of described single-chip microcomputer is connected with described computing machine by the CAN bus chip, is used for the steering order that receiving computer sends;
The input of described single-chip microcomputer, output port connect the input port that high LVPS drives chip, the output port that described high LVPS drives chip connects some relays, be used for the charging of control capacitance (N) and external pulse electric capacity, wherein the first constant current mode charge power supply (5) connects electric capacity (N) and it is charged;
Described single-chip microcomputer input, output port connect the input port that MOSFET (C) drives chip, described MOSFET drives the grid of the output port connection MOSFET (C) of chip, the drain electrode of described MOSFET (C) connects electric capacity (N), source ground is used for control capacitance (N) and realizes the discharge of external pulse electric capacity by transformer.
3. electromagnetic pulse sound source according to claim 2, it is characterized in that, control circuit (7) also comprises a protection circuit, this protection circuit is arranged between CAN bus and the computing machine, comprise that three the tunnel are arranged in parallel at the Transient Suppression Diode of two series connection at the two ends of CAN bus, anti-thunder tube and another anti-thunder tube of two series connection, wherein, ground connection between the Transient Suppression Diode of two series connection, ground connection between the anti-thunder tube of two series connection is used for eliminating the strong-electromagnetic field of discharge moment generation to destruction and the interference of control circuit chips.
4. electromagnetic pulse sound source according to claim 1 is characterized in that, the withstand voltage of described triggered vacuum gap (2) is 5～10KV, and the withstand voltage of described MOSFET (C) is 500V.
5. electromagnetic pulse sound source according to claim 1 is characterized in that, in the transducer of described transmitter unit (4);
Be coaxially arranged with insulating mat (44) between described telefault (61) and the vibrating plate (5);
The round gasket (43) of the top covering of described vibrating plate (45) and shell (48) coupling, sealing pad (43) is fixed between pressure ring (41) and the shell (48) by bolt (42);
Be arranged with insulated terminal (49) on the described electrode (13);
Described vibrating plate (45) adopts the sheet metal of lightweight high conductivity, comprises being selected from aluminium alloy, titanium alloy and the magnalium any;
Described shell (48) adopts permeability magnetic material;
The consistency of thickness of the thickness of described para tape (14) and telefault (61) is 6～8mm;
The material of described planar metal plate comprises any that is selected from copper, aluminium, aluminium alloy, titanium alloy and magnalium;
The flatness of described planar metal plate≤0.01.
6. electromagnetic pulse sound source according to claim 1, it is characterized in that, described pulse sound source shell (1) comprises sound source shell front panel (8), sound source housing main body (9), sound source shell rear panel (10), be bolted between sound source shell front panel (8), the outer rear panel (10) of sound source and the sound source housing main body (9), the sound source housing main body has sealing strip mounting groove on (9);
Described pulsed capacitance (N) is arranged at the bottom of housing main body; Triggered vacuum gap (3) is arranged at the top of housing main body, be positioned at pulsed capacitance directly over.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110201438.2A CN102890928B (en) | 2011-07-19 | 2011-07-19 | Electromagnetic pulse sound source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110201438.2A CN102890928B (en) | 2011-07-19 | 2011-07-19 | Electromagnetic pulse sound source |
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| CN102890928A true CN102890928A (en) | 2013-01-23 |
| CN102890928B CN102890928B (en) | 2014-04-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100714A (en) * | 1985-04-01 | 1986-10-01 | 中国科学院东海工作站 | Electromagnetic pulse transducer |
| US6295873B1 (en) * | 1999-07-22 | 2001-10-02 | The United States Of America As Represented By The United States Department Of Energy | Ultrasonic sensor and method of use |
| CN200969214Y (en) * | 2006-10-16 | 2007-10-31 | 陈浩滨 | Electronic horn for motor vehicle |
| CN202167231U (en) * | 2011-07-19 | 2012-03-14 | 中国科学院声学研究所 | Electromagnetic pulse sound source |
-
2011
- 2011-07-19 CN CN201110201438.2A patent/CN102890928B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100714A (en) * | 1985-04-01 | 1986-10-01 | 中国科学院东海工作站 | Electromagnetic pulse transducer |
| US6295873B1 (en) * | 1999-07-22 | 2001-10-02 | The United States Of America As Represented By The United States Department Of Energy | Ultrasonic sensor and method of use |
| CN200969214Y (en) * | 2006-10-16 | 2007-10-31 | 陈浩滨 | Electronic horn for motor vehicle |
| CN202167231U (en) * | 2011-07-19 | 2012-03-14 | 中国科学院声学研究所 | Electromagnetic pulse sound source |
Non-Patent Citations (2)
| Title |
|---|
| QIANBAO QIU ET AL: "《EMR Measurement and EMC Design of Underwater Plasma Sound Source》", 《2010 INTERNATIONAL CONFERENCE ON ELECTRICAL AND CONTROL ENGINEERING》 * |
| 刘春奎等: "《电磁脉冲声源系统的分析和测量》", 《声学学报》 * |
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