CN1779482A - Transmitting method and transmitter for underwater super-wideband combined audio array - Google Patents
Transmitting method and transmitter for underwater super-wideband combined audio array Download PDFInfo
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- CN1779482A CN1779482A CN 200410089145 CN200410089145A CN1779482A CN 1779482 A CN1779482 A CN 1779482A CN 200410089145 CN200410089145 CN 200410089145 CN 200410089145 A CN200410089145 A CN 200410089145A CN 1779482 A CN1779482 A CN 1779482A
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Abstract
A method for emitting and combining underwater super wideband sound array includes applying underwater sound synthetic technique and multiarray emission technique of sub frequency channel and multimode vibration-emission transducer to realize free selection of sweep frequency signal combination on sea detecting instruments and any program controlled adjustment of emission operating parameter. An emitting system device of underwater super wideband combined sound array is also disclosed.
Description
Affiliated field
Patent of the present invention relates to the transducer combinations acoustic matrix of the sound wave emissions that is used for the underwater sound detection and the method and the device of emission coefficient, be particularly useful for the underwater sound ultra broadband combination acoustic matrix and the emission coefficient device of Different Strata, resolution and stratum penetration depth hydrospace detection instrument, can also be used for other oceanographic instrumentations such as underwater communication, remote measurement.
Background technology
In the hydrospace detection of prior art and the ocean development activity, generally adopt with the oceanographic instrumentation of sound wave as detection means, underwater sound detection instrument is operated in the low frequency frequency range, in order to make instrument have bigger operating distance and higher resolution, need the transmitting transducer acoustic matrix high-powerly to launch, the acoustical signal of emission has the working band of broad again.And existing transmitting transducer, in order to obtain higher electroacoustic efficiency, transmitting transducer is operated near the resonance frequency of a certain vibration mode, at this moment, transducer can equivalence be the four-pole network that comprises a resistance, an inductance and an electric capacity on circuit, its frequency characteristic such as same bandpass filter, working band is very narrow, bandwidth deltaf f and centre frequency f
0Ratio be about 0.2～0.33, because the resolution of hydrospace detection instrument is directly proportional with the bandwidth deltaf f of transmitting transducer acoustic matrix, penetrance is inversely proportional to frequency of operation and is directly proportional with transmitting sound power, therefore, adopt the underwater sound narrow-band transducer of prior art or the requirement that wide-band transducer all can't satisfy ultra broadband, high resolving power hydrospace detection instrument.
As everyone knows, underwater sound detection instrument is operated in the low frequency frequency range, the piezoelectric transducer or the magnetostrictive transducer that are used for the acoustic-electric energy conversion exist a very big direct capacitance or static inductance, when the underwater sound transmitter of prior art adopts power amplifier that transducer is encouraged, a very big idle component will be introduced in consequent phasing degree, and the utilization ratio of power amplifier is significantly reduced.In order to improve the utilization ratio of power amplifier, prior art adopts the power network that has a big inductance or big electric capacity to come transducer is mated tuning usually, and so tuning be for a certain frequency, in the arrowband scope, relatively effectively, realize in the ultra wide band frequency of hundreds of Hz～tens kHz that tuning, the balanced emission of coupling then exists very large defective.
Prior art has same type vibration mode transducer array element to adopt array element to be combined to form beam transmission, and the underwater sound wide-band transducer battle array of a plurality of special-shaped vibration modes is launched together, then exists many paroxysms and penetrates major defects such as mutual radiation effect, directive property dispersion, the distortion of transmitting power response family curve.
The world today has entered ocean century, the transducer of the mission requirements hydrospace detection instrument of hydrospace detection and ocean development is the interior work of big depth range of tens meters～several kms under water, transducer must bear the hydrostatic force of tens Mpa, and there is a series of problem in aspects such as the transducer designs of prior art and selection.On the other hand,, promptly need the radiating surface vibration displacement of transducer enough big, just must make between the vibration radiation face of transducer and the supporting construction to have decoupling performance preferably for the sound radiation power that makes transducer is big as far as possible.But the hydrostatic force that well behaved decoupling material will bear tens～60Mpa in the prior art transducer then exists serious defective.
Summary of the invention
In order to overcome existing transmitting transducer and the narrow shortcoming of Circuits System frequency of operation, patent of the present invention proposes a kind of underwater sound ultra broadband combination acoustic matrix and emitter, adopt the transducer array of multiple different vibration modes to be combined into a ultra broadband transmitting transducer acoustic matrix from hundreds of Hz～tens kHz, and adopt multichannel emissive power amplifying circuit and multichannel matching network that the transducer array of every kind of vibration mode is carried out tuning coupling and emission respectively, and under the control system controlled by computer, realize a plurality of frequency bands, the underwater sound ultra broadband acoustic power emission of multiple emission pulsewidth and cycle and power stepping.
The technical solution used in the present invention is:
Underwater sound ultra broadband combination acoustic matrix and method for transmitting comprise the ultra broadband acoustic matrix combined method of many types of underwater sound wide-band transducer and the power emission method of underwater sound ultra broadband combination acoustic matrix;
(1) the ultra broadband acoustic matrix combined method of many types of underwater sound wide-band transducer comprises the following steps:
(1), is a plurality of special-shaped underwater sound wide-band transducer that intend to constitute the underwater sound ultra broadband combination acoustic matrix frequency range that shares out the work at first according to the requirement of required super wide working band and the transmission frequency response characteristic of all kinds underwater sound wide-band transducer;
(2) choose reasonable constitutes the type and the emission band width thereof of ultra broadband combination acoustic matrix wide-band transducer, and the transmission frequency response of selected wide-band transducer is satisfied: working band width Delta f
Bb〉=(03～0.7) f
iCondition so that guarantee the emission band width Delta f of ultra broadband combination acoustic matrix
Ubb〉=0.5f
0, f wherein
0Be ultra broadband combination acoustic matrix centre frequency, f
iBe the wide-band transducer centre frequency;
(3) underwater sound ultra broadband combination acoustic matrix is combined by a plurality of special-shaped underwater sound wide-band transducer that is installed in the same platform, necessary meticulous adjustment during installation, and the emission acoustic centre of source that makes all participate in the wide-band transducer of acoustic matrixs combination remains in the plane;
(4) by the design of structuring the formation to a plurality of special-shaped wide-band transducers, make underwater sound ultra broadband combination acoustic matrix obtain the emission directive property of omnidirectional, also can adopt acoustic energy to focus on design and obtain directed emission directive property;
(5) by optimal design and bandwidth adjustment to wide-band transducer, the neighboring edge of the transmission frequency response of each wide-band transducer in the combination acoustic matrix is overlapped mutually, on each working frequency range, realize seamless splicedly, cover whole super wide working band so that guarantee the transmission frequency response (3～-5dB bandwidth) of combination acoustic matrix;
(6) the various underwater sound wide-band transducer of ultra broadband combination acoustic matrix is selected anti-high hydrostatic pressure design for use, satisfies the requirement of shallow water and deep water emission.
(2) underwater sound ultra broadband combination acoustic matrix power emission method comprises the following steps:
(1) according to the number of combinations of underwater sound ultra broadband combination acoustic matrix and their sound, electrology characteristic, the port number of design configurations transmitter;
(2) many acoustic matrixs-multichannel transmitter adopts synchronously and the homophase lift-off technology, realize synchronously and the homophase emission at the corresponding point of each frequency-division section, and the signal source amplitude carried out the countermodulation equilibrium, make multichannel transmitter when the ultra wide band range inter-sync is launched, adapt to the dynamic change of loaded impedance amplitude and phase place, thereby improve the conversion efficiency of system and obtain desired system responses curve;
(3) the emission modulation system adopts frequency-division section linear frequency modulation and bell envelope lift-off technology, effectively improve the emission working band width of acoustic matrix and the resolution that the underwater sound signal echo detects performance and stratum, seabed, guarantee the reasonable overlapping and seamless overlap joint at each adjacent working frequency range edge of many gusts of combined transmit of ultra broadband;
(4) transmiting signal source design should take into account the transmitting response of respectively organizing transducer array and practical application area specific (special) requirements and the underwater sound signal propagation attenuation rule to acoustical signal, convert the digital signal of signal source to simulating signal, adopt the emission of wide-band linearity power amplification and non-uniform weighting acoustical power, make the synthetic ultra broadband acoustic matrix transmitting response of a plurality of frequency ranges comparatively smooth;
(5) signal source of many gusts of multiband non-uniform weightings of ultra broadband acoustical power emission adopts CPU control, when the Marine Geology underwater acoustic measurement, sound wave is to be directly proportional with the bandwidth of sound wave to the resolution on stratum, seabed, it is wide band resolution height, and sound wave is that frequency of operation with sound wave is inversely proportional to the penetrance on stratum, seabed, the penetrance that is low frequency is strong, and the propagation attenuation of sound wave is and square being inversely proportional to of frequency, under the condition of ultra broadband emission, the propagation attenuation of different frequency bands sound wave is unequal, be subjected to the combined influence of above-mentioned factor in view of the underwater acoustic measurement performance, so the non-uniform weighting coefficient of many gusts of multibands is calculated by CPU, generate and transmit, realize that sound wave reaches optimized choice and control to the penetrance on stratum and resolution and propagation thereof;
(6) transmission of multichannel coupling and phase-shift circuit are adopted in the power amplification of ultra broadband multichannel, in ultra wide band range, to corresponding respectively one group of phase-shift circuit and the matching network of connecting of a plurality of wide-band transducer battle arrays that participate in combination, keep multichannel to launch the consistance of synchronized transmissions point phase place, help improving the electroacoustic energy conversion efficiency of power emission quality of signals and Ge Lu transducer;
(7) emissive power amplification system and underwater sound ultra broadband combination acoustic matrix places same underwater movement platform, or is placed in the cabin of water surface movable platform; When the emissive power amplification system placed the underwater movement platform, emissive power amplification system cabinet should adopt sealing and solid thermal conduction or liquid heat dissipation technology under the high hydrostatic pressure, so that satisfy the environmental suitability requirement;
(8) the emissive power amplification system adopts and launches accumulation power supply under water, place the underwater movement platform of implementing deepwater work in view of system chassis, rely on water surface movable platform and be transferred to the circuit system power supply by long cable, for preventing that the pressure phenomenon from appearring falling in the T-time, the multi-path large power transmitter uses the accumulation power supply emission, long cable is powered to accumulation power supply with little electric current, reduces the loss of long cable significantly.
Underwater sound ultra broadband combination acoustic matrix and emitter comprise that underwater sound ultra broadband makes up acoustic matrix system 1, system 2, terminal box 3 and mounting platform 4 are penetrated in the many paroxysms of underwater sound ultra broadband, are:
Underwater sound ultra broadband combination acoustic matrix system 1 is by broad band low frequency transducer acoustic matrix 11, intermediate frequency wide-band transducer acoustic matrix 12,13 combinations of high-frequency wideband transducer acoustic matrix also are installed in formation in the same mounting platform 4, the input end of each frequency range wide-band transducer acoustic matrix is connected to the many paroxysms of underwater sound ultra broadband by cable and terminal box 3 respectively and penetrates the corresponding emission power amplifier of system 2 and the output terminal of match circuit, underwater sound ultra broadband combination acoustic matrix system 1 places the approaching liquid medium of water or density and water, the modulation signal that system 2 sends here is penetrated in the many paroxysms of underwater sound ultra broadband converted to sound wave by medium radiation and propagation in water;
The many paroxysms of underwater sound ultra broadband are penetrated system 2 and are made up of with control circuit 21, multichannel power amplification and matching network 22 and emission power system 23 signal source; Signal source and control circuit 21 comprise program control simulation signal generator 211, control microcomputer CPU212, failure detector circuit 213; The program control simulation signal generator 211 of signal source and control circuit 21 is under the control of control microcomputer CPU212, deliver to multichannel power amplification and matching network 22, the output of each road power amplification and matching network is added to ultra broadband combination acoustic matrix system 1 corresponding wide-band transducer acoustic matrix through terminal box 3.
The underwater sound ultra broadband combination acoustic matrix system of described underwater sound ultra broadband combination acoustic matrix and emitter is:
Broad band low frequency transducer acoustic matrix 11 comprises 1 frequency acoustic characteristic good broadband rare earth circular ring type transducer at least, or rationally selects for use the broadband double-excitation longitudinal to transducer;
Intermediate frequency wide-band transducer acoustic matrix 12 comprises 1 ring-like transducer of intermediate frequency acoustic characteristic good broadband overflow at least, or extensional vibration flexure type transducer;
High-frequency wideband transducer acoustic matrix 13 comprises 1 high frequency acoustic characteristic good broadband coupling stratotype transducer at least;
To launch the acoustic centre of source when a plurality of frequency range wide-band transducer acoustic matrixs are installed and be adjusted in the same plane, and not stop mutually when launching sound wave.
Program control simulation signal generator 211 comprises derived digital signal 2111,8 bit parallel interfaces 2112, D/A conversion 2113 and gain-programmed amplifier 2114; The receiving end of 8 bit parallel interfaces 2112 connects the output terminal of derived digital signal 2111, its output is added to control microcomputer CPU212 parallel interface, the serial line interface of CPU212 also is sent to CPU to the emission and the emission parameter control command that receive, CPU resolves processing through the control microcomputer, generate and transmit digital signal to D/A change-over circuit 2113 input ends, D/A change-over circuit 2113 is converted to simulating signal to digital signal, the output terminal of D/A change-over circuit 2113 is connected the input end of gain-programmed amplifier 2114, CPU sends weighting parameters and emission parameter control command to gain-programmed amplifier 2114, under system controlled by computer, the program control simulating signal of gain-programmed amplifier 2114 outputs is added to the input end of multichannel power amplification and matching network 22.
The multichannel power amplification and the matching network 22 of system 2 penetrated in the many paroxysms of described underwater sound ultra broadband, is: power amplification of every road and matching network comprise bandpass filter 221, phase shifter 222, linear power amplifier 223 and impedance matching network 224; The input end of bandpass filter 221 connects gain-programmed amplifier 2114 output terminals of program control simulation signal generator 211, the signal of this road frequency range gating of bandpass filter 221 outputs is added to the input end of phase shifter 222, the output terminal of phase shifter 222 is connected to linear power amplifier 223 input ends, linear power amplifies 223 output and is added to the anti-matching network of this roadlock, is sent to corresponding wide-band transducer acoustic matrix through the linear power amplifying signal of matching treatment by terminal box (3); The phase shifter on every road (222) makes and is added to the corresponding point-to-point phase place homophase of transmitting of each road power amplification input end synchronously.
The signal source and the control circuit 21 of system 2 penetrated in the many paroxysms of described underwater sound ultra broadband, is: automatic failure detection circuit 213 comprises fault sample circuit 2131, A/D conversion 2132 and control microcomputer CPU212; A plurality of input ends of fault sample circuit 2131 are connected on the output branch pressure side of each road matching network 224, and its output is delivered to the serial line interface of control microcomputer CPU212 through the A/D conversion, and microcomputer CPU differentiates launching failure and monitors.
Beneficial effect of the present invention:
(1) a kind of underwater sound ultra broadband transducer combinations acoustic matrix that provides of the present invention and the implementation method of device thereof, adopt the good underwater sound multiband of this method preferred properties, the broadband emission transducer of many types of vibration mode, the bandwidth of its combination acoustic matrix satisfies the requirement of ocean ultra broadband detection instrument working band from hundreds of Hz to tens kHz, adopt the high-power amplification of multichannel 1～number multikilowatt and the underwater sound ultra broadband transducer combinations sound source that network mates lift-off technology, also can satisfy the requirement of high resolving power and good penetrance over the ground.
(2) underwater sound ultra broadband transducer combinations acoustic matrix emission coefficient of the present invention, the ultra wide band frequency of hundreds of Hz～tens kHz is divided into a plurality of frequency ranges and adopts bell emission exhibition technology frequently, in each frequency range internal power amplification and matching network circuit and the corresponding good coupling of wide-band transducer acoustic matrix realization, solved the tuning and balanced emission of the coupling contradiction of ultra wide band frequency significantly.
(3) the micro-computer controlled weighting of employing and the linear FM signal of underwater sound ultra broadband transducer combinations acoustic matrix emission proposition of the present invention, and synchronous, the homophase lift-off technology of many gusts isoplanar, the acoustic centre of source and each gust, overcome many paroxysms effectively and penetrated problems such as mutual radiation effect, directive property dispersion, the distortion of transmitting power response family curve.
(4) the present invention has selected for use the broadband deep water transducer of the multiple vibration mode of function admirable to constitute underwater sound ultra broadband combination acoustic matrix, the problem of the hydrostatic force of the anti-tens～60Mpa of underwater sound ultra broadband transducer combinations acoustic matrix, the broadband deep water transducer that is decomposed into multiple vibration mode solves.
(5) the present invention proposes the many types of vibration mode transmitting transducer of frequency-division section acoustic matrix synthetic technology and lift-off technology, for realization hydrospace detection instrument is adjusted implementation method and the device that a kind of underwater sound ultra broadband that provides makes up acoustic matrix and emission coefficient in real time to any selection and the emission running parameter of swept-frequency signal combination, make instrument work in optimum condition, be applicable to the detection requirement of Different Strata, resolution and stratum penetration depth, the deep water wide-band transducer technology of innovation also can be used for other oceanographic instrumentations such as underwater communication, remote measurement.
Description of drawings
Fig. 1 adopts the device of underwater sound ultra broadband combination acoustic matrix of the present invention and launching technique to form synoptic diagram;
Fig. 2 is that underwater sound ultra broadband of the present invention combination acoustic matrix and emitter embodiment are at the identical platform scheme of installation;
Fig. 3 penetrates the block diagram of system for the many paroxysms of underwater sound ultra broadband of the present invention;
Fig. 4 is the program control simulation signal generator of the present invention and multichannel power amplification and matching network theory diagram;
Fig. 5 is the emission power block diagram of system of the many array 1 systems of underwater sound ultra broadband of the present invention;
Fig. 6 underwater sound ultra broadband combination acoustic matrix of the present invention and emitter embodiment composition frame chart.
Among Fig. 1 and Fig. 2: 1-underwater sound ultra broadband combination acoustic matrix system 1; 2-underwater sound ultra broadband combination acoustic matrix emission coefficient; The 3-terminal box; The 4-mounting platform; 5-surface platform towing cable; 11-low-frequency transducer battle array; 12-1 and 12-2-intermediate frequency transducer array; 13-high-frequency transducer battle array; 21-signal source and control circuit; Power amplification of 22-multichannel and matching network; 23-emission power system.
Embodiment
At first can in whole ultrabroad band scope, to realize balanced emission and can at first select working frequency range to cover the broadband deep water transducer of some kinds of vibration modes of ultrabroad band scope in order to provide at the underwater sound ultrabroad band combination acoustic matrix and the emitter of deep water scope work.
Broad band low frequency transducer array in the frequency range of hundreds of Hz～several kHz is selected rare earth annulus transducer for use, this class transducer has bandwidth, frequency constant is little, power capacity is big and voltage sends the high characteristics of response, its sound source level 〉=175dB, working depth 6000m.
Intermediate frequency wide-band transducer battle array in the frequency range of several kHz～tens kHz is selected overflow-type annulus transducer for use, such transducer combines the radial vibration frequency of sap cavity resonant frequency and annulus, has bandwidth, the characteristics that power capacity is big, its sound source level 〉=190dB, working depth 6000m.
Frequency range high band wide-band transducer battle array at tens kHz～tens kHz is selected the vertical transducer of matching layer for use, the matching layer technology has formed the harmonic peak of two vicinities, can effectively widen frequency of operation, thereby the emission broadband of broadening transducer, its sound source level 〉=210dB, the fluctuating of transmitting voltage response≤± 4dB, working depth 6000m.
The underwater sound ultra broadband combination acoustic matrix working band bandwidth of embodiment is 700Hz～30kHz, be assigned as low frequency 700Hz～3kHz, three frequency ranges of intermediate frequency 3kHz～12kHz and high frequency 12kHz～30kHz, low-frequency range 700Hz～3kHz selects a broadband rare earth annulus transducer 11 for use, Mid Frequency selects for use two performances and the identical broadband of size overflow-type annulus transducer 12-1 and 12-1 to be combined into acoustic matrix, the corresponding tuning-points of emission of two transducer 12-1 and 12-1 is tuned at sap cavity resonance peak and radial vibration peak respectively, transmit frequency band behind the combination acoustic matrix broadening is 3kHz～12kH, and high band 12kHz～30kHz selects a vertical transducer 13 of Broadband Matching layer for use.Underwater sound ultra broadband combination acoustic matrix embodiment of the present invention at the identical platform scheme of installation as shown in Figure 2.Mounting platform 4 is streamlined towed body, each frequency range wide-band transducer battle array is installed in the towed body front deck, in the cabin and inject fresh water, each frequency range wide-band transducer battle array is installed in the towed body fixed station, low-frequency transducer battle array 11 and high-frequency transducer battle array 13 axis are laid, intermediate frequency transducer array 12-1 and 12-1 rotational symmetry are laid, and it is vertical with towed body fixed station plane that the acoustic centre of source is penetrated in each paroxysm, remains in the same plane.The towed body rear deck is an electronic compartment, system 2 and emission power system 23 thereof, terminal box 3 are penetrated in the many paroxysms of underwater sound ultra broadband, be installed in the towed body rear deck, not water filling of rear deck, but system 2 and emission power system 23 thereof are penetrated in the many paroxysms of ultra broadband, terminal box 3 all has good watertightness.
Below in conjunction with Fig. 3, Fig. 4, Fig. 5, Fig. 6, the course of work of system is penetrated in the many paroxysms of underwater sound ultra broadband of describing the embodiment of the invention in detail.
Fig. 3 provides the many paroxysms of underwater sound ultra broadband of the present invention and penetrates the composition frame chart of system.The many paroxysms of underwater sound ultra broadband are penetrated system 2 and are made up of with control circuit 21, multichannel power amplification and matching network 22 and emission power system 23 signal source.Signal source and control circuit 21 are made up of program control simulation signal generator 211, control microcomputer CPU212 and failure detector circuit 213.For take all factors into consideration the sound wave frequency span to the resolution on stratum, seabed, sound wave frequency of operation to the penetrance on stratum, seabed and the influence of propagation attenuation, the non-uniform weighting coefficient of many gusts of multiband emissive power gain amplifiers is calculated, generates and transmitted by CPU, and the output amplitude that adopts many gusts of multiband non-uniform weightings of program control ultra broadband simulation signal generator adjusts the transmitting gain that linear power amplifies, and realizes that sound wave reaches optimized choice and control to the penetrance on stratum and resolution and propagation thereof.
The many paroxysms of underwater sound ultra broadband of the present invention are penetrated the program control simulation signal generator of system and multichannel power amplification and matching network composition frame chart as shown in Figure 4.Program control simulation signal generator 211 comprises derived digital signal 2111,8 bit parallel interfaces 2112, D/A converter 2113 and gain-programmed amplifier 2114 and control microcomputer CPU212.Multichannel power amplification and matching network 22 can have I to power amplification of N road and matching network, and power amplification of every road and matching network are made of bandpass filtering 221, phase shifter 222, linear power amplifier 223, transformer matching network 224.Multichannel power amplification and matching network 22 are delivered in the output of program control simulation signal generator 211, and emission power system 23 is output as power amplification and matching network 22 power supplies, and multichannel power amplification and matching network 22 outputs are added to combination acoustic matrix system 1 through terminal box 3.
Fig. 5 provides the emission power block diagram of system of the embodiment of the invention, and emission power system (23) comprises DC converter (231) and capacitor energy-storing power supply (232); The surface platform distribution carries 375V to be added to DC converter (231) input end through towing cable 5, through the DC/DC conversion, export two groups of low-voltage direct ± 15V and ± 5V, one tunnel high voltage direct current 190VDC, ± 15V and ± digital and analog circuit power supply that 5V penetrates system 2 for the many paroxysms of underwater sound ultra broadband, 190VDC send capacitor energy-storing power supply (232) input end, each route power amplifier (223I) of multichannel power amplification and matching network (22) is given in capacitor energy-storing power supply (32) output respectively, (223H), (223III) power supply, give capacitor energy-storing power supply (232) high voltage-small current on the surface platform towing cable 5, accumulation power supply during emission (232) provides big electric current power supply, instant power-down when preventing to launch for power amplifier module.
Underwater sound ultra broadband combination acoustic matrix of the present invention and emitter embodiment composition frame chart are as shown in Figure 6.Multichannel power amplification and matching network 22 adopt three the tunnel, and it partly is made up of bandpass filtering 221, phase shifter 222, linear power amplifier 223, transformer matching network 224, the DC/DC that controls CPU212 and emission power system and the capacitor energy-storing power supply etc. of I, II and III three tunnel.The input signal of Linear Power Amplifier is a linear FM signal, adopt derived digital signal 2111,8 bit parallel interfaces 2112, D/A converter 2113, gain-programmed amplifier 2114 to form program control simulation signal generator 211, gain-programmed amplifier 2114 adopts measuring amplifier AD524, analog switch 4051 and resistor network to constitute, D/A converter 2113 adopts 16 D/A converters of AD7846 type with zero point and gain debugging functions, select supply voltage to be ± 15V output voltage ± 10V.Derived digital signal 2111 outputs are delivered to control microcomputer CPU212 through 8 bit parallel interfaces 2112, digital signal converts simulating signal to via D/A converter 2113, gain-programmed amplifier 2114 input ends are received in the output of D/A converter 2113, control microcomputer CPU212 adopts W77E58, under the programmed control of CPU, gain-programmed amplifier 2114 is pressed 1.5dB multiplying power adjustment gain, change the amplitude of the linear FM signal of power input amplifier, emissive power is amplified realize program control power stepping and non-uniform weighting.
The linear FM signal of gain-programmed amplifier 2114 outputs is added to three tunnel power amplifications and matching network simultaneously, every road is after MAX267 type bandpass filtering 221 filtering gatings and phase shifter 222 phase shifts, input FQL40N50 power amplifier 223 input ends, power amplification output is sent transformer matching network 224 to carry out power match and is handled, and the output of the matching network 224 on I, II and III road is respectively through terminal box dispensing low-frequency transducer acoustic matrix, intermediate frequency transducer acoustic matrix and high-frequency transducer acoustic matrix.
Automatic failure detection circuit 213 comprises fault sample circuit 2131 and A/D conversion 2132 and control microcomputer CPU212, fault sample circuit 2131 is selected 12 simulations of DH1082 type multichannel A/D data acquisition module for use, its three input ends are received the branch pressure side of three road matching networks, 224 outputs, gather the emission work state information of three-route power amplification and matching network in real time, the output of fault sample circuit 2131 is converted to digital signal through A/D, deliver to the serial ports of control microcomputer CPU, carry out fault distinguishing and indication by CPU, in order to the emission working state real-time monitoring.
Underwater sound ultra broadband combination acoustic matrix of the present invention and emission coefficient device are used for the emission parameter of ocean underwater sound geologic prospecting embodiment and select as follows:
The emission band width of underwater sound ultra broadband combination acoustic matrix: 700Hz～30.0kHz.
According to Marine Geology exploration requirement, the transmit frequency band of device is divided into 6 frequency ranges again:
Frequency range one is 0.7～1.4kHz;
Frequency range two is 1.4～5.6kHz;
Frequency range three is 5.6～14.4kHz;
Frequency range four is 4.4～21.6kHz;
Frequency range five is 21.6～30.0kHz;
Frequency range six is 0.7～30.0kHz.
Fire pulse width: 1ms, 2ms, 5ms, 10ms, 20ms is optional.
Emission cycle: 67ms, 134ms, 200ms, 267ms, 334ms, 400ms, 467ms, 534ms, 600ms, 667ms, 734ms, 800ms, 867ms, 934ms, 1000ms is optional.
Electromotive power output: maximum 1500W.
Power gain stepping: 0dB ,-3dB ,-6dB ,-9dB ,-12dB ,-15dB ,-18dB ,-21dB.
Claims (10)
1. underwater sound ultra broadband combination acoustic matrix and method for transmitting comprise the ultra broadband acoustic matrix combined method of many types of underwater sound wide-band transducer and the power emission method of underwater sound ultra broadband combination acoustic matrix;
(1) the ultra broadband acoustic matrix combined method of many types of underwater sound wide-band transducer comprises the following steps:
(1), is a plurality of special-shaped underwater sound wide-band transducer that intend to constitute the underwater sound ultra broadband combination acoustic matrix frequency range that shares out the work at first according to the requirement of required super wide working band and the transmission frequency response characteristic of all kinds underwater sound wide-band transducer;
(2) choose reasonable constitutes the type and the emission band width thereof of ultra broadband combination acoustic matrix wide-band transducer, and the transmission frequency response of selected wide-band transducer is satisfied: working band width Delta f
Bb〉=(0.3～0.7) f
iCondition so that guarantee the emission band width Delta f of ultra broadband combination acoustic matrix
Ubb〉=0.5f
0, f wherein
0Be ultra broadband combination acoustic matrix centre frequency, f
iBe the wide-band transducer centre frequency;
(3) underwater sound ultra broadband combination acoustic matrix is combined by a plurality of special-shaped underwater sound wide-band transducer that is installed in the same platform, necessary meticulous adjustment during installation, and the emission acoustic centre of source that makes all participate in the wide-band transducer of acoustic matrixs combination remains in the plane;
(4) by the design of structuring the formation to a plurality of special-shaped wide-band transducers, make underwater sound ultra broadband combination acoustic matrix obtain the emission directive property of omnidirectional, also can adopt acoustic energy to focus on design and obtain directed emission directive property;
(5) by optimal design and bandwidth adjustment to wide-band transducer, the neighboring edge of the transmission frequency response of each wide-band transducer in the combination acoustic matrix is overlapped mutually, on each working frequency range, realize seamless splicedly, cover whole super wide working band so that guarantee the transmission frequency response (3～-5dB bandwidth) of combination acoustic matrix;
(6) the various underwater sound wide-band transducer of ultra broadband combination acoustic matrix is selected anti-high hydrostatic pressure design for use, satisfies the requirement of shallow water and deep water emission.
(2) underwater sound ultra broadband combination acoustic matrix power emission method comprises the following steps:
(1) according to the number of combinations of underwater sound ultra broadband combination acoustic matrix and their sound, electrology characteristic, the port number of design configurations transmitter;
(2) many acoustic matrixs-multichannel transmitter adopts synchronously and the homophase lift-off technology, realize synchronously and the homophase emission at the corresponding point of each frequency-division section, and the signal source amplitude carried out the countermodulation equilibrium, make multichannel transmitter when the ultra wide band range inter-sync is launched, adapt to the dynamic change of loaded impedance amplitude and phase place, thereby improve the conversion efficiency of system and obtain desired system responses curve;
(3) the emission modulation system adopts frequency-division section linear frequency modulation and bell envelope lift-off technology, effectively improve the emission working band width of acoustic matrix and the resolution that the underwater sound signal echo detects performance and stratum, seabed, guarantee the reasonable overlapping and seamless overlap joint at each adjacent working frequency range edge of many gusts of combined transmit of ultra broadband;
(4) transmiting signal source design should take into account the transmitting response of respectively organizing transducer array and practical application area specific (special) requirements and the underwater sound signal propagation attenuation rule to acoustical signal, convert the digital signal of signal source to simulating signal, adopt the emission of wide-band linearity power amplification and non-uniform weighting acoustical power, make the synthetic ultra broadband acoustic matrix transmitting response of a plurality of frequency ranges comparatively smooth;
(5) signal source of many gusts of multiband non-uniform weightings of ultra broadband acoustical power emission adopts CPU control, when the Marine Geology underwater acoustic measurement, sound wave is to be directly proportional with the bandwidth of sound wave to the resolution on stratum, seabed, it is wide band resolution height, and sound wave is that frequency of operation with sound wave is inversely proportional to the penetrance on stratum, seabed, the penetrance that is low frequency is strong, and the propagation attenuation of sound wave is and square being inversely proportional to of frequency, under the condition of ultra broadband emission, the propagation attenuation of different frequency bands sound wave is unequal, be subjected to the combined influence of above-mentioned factor in view of the underwater acoustic measurement performance, so the non-uniform weighting coefficient of many gusts of multibands is calculated by CPU, generate and transmit, realize that sound wave reaches optimized choice and control to the penetrance on stratum and resolution and propagation thereof;
(6) transmission of multichannel coupling and phase-shift circuit are adopted in the power amplification of ultra broadband multichannel, in ultra wide band range, to corresponding respectively one group of phase-shift circuit and the matching network of connecting of a plurality of wide-band transducer battle arrays that participate in combination, keep multichannel to launch the consistance of synchronized transmissions point phase place, help improving the electroacoustic energy conversion efficiency of power emission quality of signals and Ge Lu transducer;
(7) emissive power amplification system and underwater sound ultra broadband combination acoustic matrix places same underwater movement platform, or is placed in the cabin of water surface movable platform; When the emissive power amplification system placed the underwater movement platform, emissive power amplification system cabinet should adopt sealing and solid thermal conduction or liquid heat dissipation technology under the high hydrostatic pressure, so that satisfy the environmental suitability requirement;
(8) the emissive power amplification system adopts and launches accumulation power supply under water, place the underwater movement platform of implementing deepwater work in view of system chassis, rely on water surface movable platform and be transferred to the circuit system power supply by long cable, for preventing that the pressure phenomenon from appearring falling in the T-time, the multi-path large power transmitter uses the accumulation power supply emission, long cable is powered to accumulation power supply with little electric current, reduces the loss of long cable significantly.
2. underwater sound ultra broadband combination acoustic matrix and emitter comprise that underwater sound ultra broadband makes up acoustic matrix system (1), system (2), terminal box (3) and mounting platform (4) are penetrated in the many paroxysms of underwater sound ultra broadband, it is characterized in that:
Underwater sound ultra broadband combination acoustic matrix system (1) is by broad band low frequency transducer acoustic matrix (11), intermediate frequency wide-band transducer acoustic matrix (12), high-frequency wideband transducer acoustic matrix (13) makes up and is installed in the same mounting platform (4) and constitutes, the input end of each frequency range wide-band transducer acoustic matrix is connected to the many paroxysms of underwater sound ultra broadband by cable and terminal box (3) respectively and penetrates the corresponding emission power amplifier of system (2) and the output terminal of match circuit, underwater sound ultra broadband combination acoustic matrix system (1) places the approaching liquid medium of water or density and water, the modulation signal that system (2) sends here is penetrated in the many paroxysms of underwater sound ultra broadband converted to sound wave by medium radiation and propagation in water;
The many paroxysms of underwater sound ultra broadband are penetrated system (2) and are made up of with control circuit (21), multichannel power amplification and matching network (22) and emission power system (23) signal source; Signal source and control circuit (21) comprise program control simulation signal generator (211), control microcomputer CPU (212), failure detector circuit (213); The program control simulation signal generator (211) of signal source and control circuit (21) is under the control of control microcomputer CPU (212), deliver to multichannel power amplification and matching network (22), the output of each road power amplification and matching network is added to the corresponding wide-band transducer acoustic matrix of underwater sound ultra broadband combination acoustic matrix system (1) through terminal box (3).
3. the underwater sound ultra broadband combination acoustic matrix system of underwater sound ultra broadband combination acoustic matrix according to claim 2 and emitter is characterized in that:
Broad band low frequency transducer acoustic matrix (11) comprises 1 frequency acoustic characteristic good broadband rare earth circular ring type transducer at least, or rationally selects for use the broadband double-excitation longitudinal to transducer;
Intermediate frequency wide-band transducer acoustic matrix (12) comprises 1 ring-like transducer of intermediate frequency acoustic characteristic good broadband overflow at least, or extensional vibration flexure type transducer;
High-frequency wideband transducer acoustic matrix (13) comprises 1 high frequency acoustic characteristic good broadband coupling stratotype transducer at least;
To launch the acoustic centre of source when a plurality of frequency range wide-band transducer acoustic matrixs are installed and be adjusted in the same plane, and not stop mutually when launching sound wave.
4. system (2) is penetrated in the many paroxysms of underwater sound ultra broadband of underwater sound ultra broadband combination acoustic matrix according to claim 2 and emitter, it is characterized in that:
Program control simulation signal generator (211) comprises that derived digital signal (2111), 8 bit parallel interfaces (2112), D/A change (2113) and gain-programmed amplifier (2114); The receiving end of 8 bit parallel interfaces (2112) connects the output terminal of derived digital signal (2111), its output is added to the parallel interface of control microcomputer CPU (212), the serial line interface of CPU (212) also is sent to CPU to firing order that receives and emission parameter control, CPU resolves processing through the control microcomputer, generate and transmit digital signal to D/A change-over circuit (2113) input end, D/A change-over circuit (2113) is converted to simulating signal to digital signal, the output terminal of D/A change-over circuit (2113) is connected the input end of gain-programmed amplifier (2114), CPU sends weighting parameters and emission parameter control command to gain-programmed amplifier (2114), under system controlled by computer, the program control simulating signal of gain-programmed amplifier (2114) output is added to the input end of multichannel power amplification and matching network (22).
5. penetrate the multichannel power amplification and the matching network (22) of system (2) according to claim 2 or the many paroxysms of 4 described underwater sound ultra broadbands, it is characterized in that: power amplification of every road and matching network comprise bandpass filter (221), phase shifter (222), linear power amplifier (223) and impedance matching network (224); The input end of bandpass filter (221) connects gain-programmed amplifier (2114) output terminal of program control simulation signal generator (211), the signal of this road frequency range gating of bandpass filter (221) output is added to the input end of phase shifter (222), the output terminal of phase shifter (222) is connected to linear power amplifier (223) input end, the output that linear power amplifies (223) is added to the anti-matching network of this roadlock, is sent to corresponding wide-band transducer acoustic matrix through the linear power amplifying signal of matching treatment by terminal box (3); The phase shifter on every road (222) makes and is added to the corresponding point-to-point phase place homophase of transmitting of each road power amplification input end synchronously.
6. the multichannel power amplification and the matching network (22) of system (2) are penetrated in many paroxysms according to the described underwater sound ultra broadband of claim 5, it is characterized in that: power amplification of every road and matching network comprise bandpass filter (221), phase shifter (222), linear power amplifier (223) and impedance matching network (224); The input end of bandpass filter (221) connects gain-programmed amplifier (2114) output terminal of program control simulation signal generator (211), the signal of this road frequency range gating of bandpass filter (221) output is added to the input end of phase shifter (222), the output terminal of phase shifter (222) is connected to linear power amplifier (223) input end, the output that linear power amplifies (223) is added to the anti-matching network of this roadlock, is sent to corresponding wide-band transducer acoustic matrix through the linear power amplifying signal of matching treatment by terminal box (3); The phase shifter on every road (222) makes and is added to the corresponding point-to-point phase place homophase of transmitting of each road power amplification input end synchronously.
7. penetrate the signal source and the control circuit (21) of system 2 according to claim 2 or the many paroxysms of 4 or 6 described underwater sound ultra broadbands, it is characterized in that: automatic failure detection circuit (213) comprises fault sample circuit (2131) and A/D conversion (2132) and control microcomputer CPU (212); A plurality of input ends of fault sample circuit (2131) are connected on the output branch pressure side of each road matching network (224), and its output is delivered to the serial line interface of control microcomputer CPU212 through the A/D conversion, and microcomputer CPU differentiates launching failure and monitors.
8. the signal source and the control circuit (21) of system are penetrated in many paroxysms according to the described underwater sound ultra broadband of claim 7, it is characterized in that: automatic failure detection circuit (213) comprises fault sample circuit (2131) and A/D conversion (2132) and control microcomputer CPU (212); A plurality of input ends of fault sample circuit (2131) are connected on the output branch pressure side of each road matching network (224), and its output is delivered to the serial line interface of control microcomputer CPU212 through the A/D conversion, and microcomputer CPU differentiates launching failure and monitors.
9. penetrate system (2) according to the many paroxysms of underwater sound ultra broadband of claim 2 or 4 or 6 or 8 described underwater sound ultra broadband combination acoustic matrixs and emitter, it is characterized in that: emission power system (23) comprises DC converter (231) and capacitor energy-storing power supply (232); DC converter (231) input end is connected to the surface platform distribution through surface platform towing cable 5, through DC converting 231DC/DC conversion, export two groups of low-voltage directs and one tunnel high voltage direct current, two groups of low-voltage directs are powered to digital and analog circuit, one tunnel high voltage direct current is sent capacitor energy-storing power supply (232) input end, each route power amplifier (223I) of multichannel power amplification and matching network (22) is given in capacitor energy-storing power supply (32) output respectively, (223II), (223III) power supply, give capacitor energy-storing power supply (232) high voltage-small current on the surface platform towing cable 5, accumulation power supply during emission (232) provides big electric current power supply for power amplifier module.
10. penetrate system (2) according to the many paroxysms of underwater sound ultra broadband of described underwater sound ultra broadband combination acoustic matrix of claim 9 and emitter, it is characterized in that: emission power system (23) comprises DC converter (231) and capacitor energy-storing power supply (232); DC converter (231) input end is connected to the surface platform distribution through surface platform towing cable 5, through the DC/DC conversion, export two groups of low-voltage directs and one tunnel high voltage direct current, two groups of low-voltage directs are powered to digital and analog circuit, one tunnel high voltage direct current is sent capacitor energy-storing power supply (232) input end, each route power amplifier (223I) of multichannel power amplification and matching network (22) is given in capacitor energy-storing power supply (32) output respectively, (223II), (223III) power supply, give capacitor energy-storing power supply (232) high voltage-small current on the surface platform towing cable 5, accumulation power supply during emission (232) provides big electric current power supply for power amplifier module.
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