CN104749567A - Amphibious fish detection sonar target echo simulation system - Google Patents
Amphibious fish detection sonar target echo simulation system Download PDFInfo
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- CN104749567A CN104749567A CN201510189742.8A CN201510189742A CN104749567A CN 104749567 A CN104749567 A CN 104749567A CN 201510189742 A CN201510189742 A CN 201510189742A CN 104749567 A CN104749567 A CN 104749567A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
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Abstract
The invention discloses an amphibious fish detection sonar target echo simulation system. The amphibious fish detection sonar target echo simulation system is characterized in that a first signal processing module and a second signal processing module can be switched over by a control simulation processing module, single-frequency carrier electric pulse signals of an electric signal interface of a fish detection sonar receiving and transmitting integrated energy transducer can be inputted into the control simulation processing module by the first signal processing module and are processed by the control simulation processing module, electric echo signals of fish school targets are generated and then are fed and outputted to the first signal processing module, acoustic signals which are generated by fish detection sonar and are received by water media are converted into electric signals by the second signal processing module, the electric signals are inputted to the control simulation processing module and are processed by the control simulation processing module, and electric echo signals of the fish school targets are generated and then are fed and outputted to the second signal processing module. The amphibious fish detection sonar target echo simulation system has the advantages that the electric signals and the acoustic signals of echo of the fish school targets can be simulated, the echo of the fish school targets can be amphibiously reflected and simulated, accordingly, the performance of the fish detection sonar can be evaluated by the aid of the amphibious fish detection sonar target echo simulation system instead of real fish schools, the development cost can be saved, the development cycles can be shortened, fish detection sonar systems can be economically, flexibly and accurately maintained and trained, and the time can be saved when the fish detection sonar systems are maintained and trained.
Description
Technical field
The present invention relates to Underwater Acoustic Object Simulation of Echo Signal technical field, particularly relate to a kind of amphibian fishing and visit sonar target echo simulation system.
Background technology
Fishing visits sonar as a classification of active sonar, and it is the visual plant of fishing boat fishing operation, and its development before coming into operation and acceptance phase, all must complete a series of function debugging and parametric measurement work on pond, lake or ocean; And after it comes into operation, also need regularly to carry out care and maintenance to it, all these work all need submarine target as acoustic signal back body, then certainly will cause a large amount of human and material resources, financial resources and temporal waste as adopted the true shoal of fish of multiple types as reflecting body.And the product that sonar target echo simulation system is sonar technique development is visited in fishing, its Main Function carries out by the acoustic reflection signal of the true shoal of fish of real time modelling development debugging and the training maintenance that sonar system is visited in fishing, many field trials can be reduced like this, not only save the development cost of product, also shorten the lead time of product, simultaneously can economical, save time, flexibly, accurately complete and sonar system maintenance and training are visited to fishing, therefore there is suitable practical value and significance, and in the industry cycle quite concerned.
But, through finding existing literature search, such as:
1. patent of invention: a kind of echo signal generation method of fish detector and device (Chinese patent, application number: 200910048430.X, publication No.: CN101527097, date of publication: 2009.09.09)
2. patent of invention: a kind of active sonar target simulator signal processing method (Chinese patent, application number: 200910100601.9, Authorization Notice No.: CN101634708B, authorized announcement date: 2012.07.04)
3. Zhao Red Army, Yang Jie: the sonar target echo simulator based on CVI+FPGA is developed. " computer engineering " the 13rd volume the 14th phase in 2007,227-229,232
Analogue system in above-mentioned three documents all cannot be simultaneously amphibious, namely cannot meet the electric signal harmony signal simulation of target echo: document 1 is mainly applicable to fishing in laboratory on the bank and visits the electric signal analogue system of sonar target echo simultaneously, cannot be directly used in the acoustical signal simulation of target echo in underwater test, and its model emulation for shoal of fish echo is not mentioned; Document 2 and document 3 are mainly applicable to the acoustical signal analogue system of target echo in underwater test, the target echo electrical signal simulation in laboratory on the bank cannot be directly used in, and document 2 and document 3 lay particular emphasis on the target echo simulation of submarine, the simulated implementation but for shoal of fish target echo has no report.
Summary of the invention
The invention provides a kind of amphibian fishing and visit sonar target echo simulation system, the electric signal harmony signal simulation of shoal of fish target echo can be met simultaneously, realize the echo reflection simulation of amphibian shoal of fish target, thus replace the real shoal of fish to assess the performance that sonar is visited in fishing, not only save the development cost that sonar is visited in fishing, also shorten the lead time that sonar is visited in fishing, simultaneously can economical, save time, flexibly, accurately complete and sonar system maintenance and training are visited to fishing, therefore there is suitable practical value and significance.
In order to achieve the above object, the invention provides a kind of amphibian fishing and visit sonar target echo simulation system, comprise: control imitation processing module, and the first signal processing module be electrically connected with control imitation processing module respectively and secondary signal processing module;
First signal processing module is directly visited sonar and is received and dispatched the electric signal interface unifying transducer and be connected with fishing, the single frequency carrier electric impulse signal that electric signal interface fishing being visited sonar transmitting-receiving unification transducer exports inputs to control imitation processing module and processes, after control imitation processing module generates the electric echo signal of shoal of fish target, feedback exports the first signal processing module to, thus realizes fishing in laboratory on the bank and visit the electric signal emulation of sonar target echo;
Secondary signal processing module contact water-medium, the acoustical signal that the fishing received by water-medium spy sonar is sent is converted to electric signal and inputs to control imitation processing module and processes, after control imitation processing module generates the electric echo signal of shoal of fish target, feedback exports secondary signal processing module to, is realized the acoustical signal emulation of shoal of fish target echo by water-medium;
Control imitation processing module switches between the first signal processing module and secondary signal processing module, thus realizes the amphibious of fishing spy sonar target echo simulation system;
Described control imitation processing module comprises:
Electronic selection switch, it is electrically connected the first signal processing module and secondary signal processing module, and this electronic selection switch input signal completed between the first signal processing module and secondary signal processing module switches and output signal switches;
Microcontroller, its output terminal is electrically connected the input end of electronic selection switch, and this microcontroller sends selects signal to electronic selection switch, controls electronic selection switch and carries out signal switching, and by the amplitude factor A of N number of different azimuth
m, time delay factor τ
mand phase factor
send to shoal of fish target echo model, frequency shift parameters is sent to Doppler shift unit;
Envelope detection unit, its input end is electrically connected the output terminal of electronic selection switch, and this envelope detection unit is to the incident wave envelope signal p will obtained after input signal detection
0t () exports shoal of fish target echo model to;
Shoal of fish target echo model, its input end is electrically connected the output terminal of envelope detection unit and the output terminal of microcontroller, and this shoal of fish target echo model receives the amplitude factor A of N number of different azimuth that microcontroller transmits
m, the time delay factor τ of N number of different azimuth
mwith the phase factor of N number of different azimuth
the envelope signal of rear generation shoal of fish echo | p
b(t) |;
Carrier frequency extraction unit, its input end is electrically connected the output terminal of electronic selection switch, and the carrier frequency of this carrier frequency extraction unit to input signal is measured and exported Doppler shift unit to after being extracted;
Doppler shift unit, its input end is electrically connected the output terminal of carrier frequency extraction unit and the output terminal of microcontroller, and this Doppler shift unit produces the carrier frequency signaling of echo according to the frequency shift parameters that microcontroller transmits;
Amplitude modulation unit, its input end is electrically connected the output terminal of shoal of fish target echo model and the output terminal of Doppler shift unit, and its output terminal is electrically connected the input end of electronic selection switch, the envelope signal of the shoal of fish echo that shoal of fish target echo model produces | p
b(t) | form the electric echo signal of shoal of fish target after the carrier frequency signaling of the echo that Doppler shift unit produces being modulated in this amplitude modulation unit.
The first described signal processing module comprises:
First transmitting-receiving converting unit, it is electrically connected the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing, the single frequency carrier electric impulse signal that the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing by this first transmitting-receiving converting unit exports transfers to input attenuation unit, and the electric echo Signal transmissions exported by output attenuatoin unit visits the electric signal interface of sonar transmitting-receiving unification transducer to fishing;
Input attenuation unit, its input end is electrically connected the first transmitting-receiving converting unit, its output terminal is electrically connected the input end of electronic selection switch in control imitation processing module, and this input attenuation unit exports the single frequency carrier electric impulse signal after decay to envelope detection unit and carrier frequency extraction unit through electronic selection switch;
Output attenuatoin unit, its input end is electrically connected the output terminal of electronic selection switch in control imitation processing module, its output terminal is electrically connected the first transmitting-receiving converting unit, and this output attenuatoin unit exports the first transmitting-receiving converting unit to after suitably being decayed by the electric echo signal of shoal of fish target.
Described secondary signal processing module comprises:
Transducer, it contacts water-medium, this transducer receives fishing by water-medium and visits the acoustical signal that sends of sonar and be converted into faint electric signal, and the echoed signal of the shoal of fish target the second transmitting-receiving converting unit exported is converted to underwater sound signal feeds back to fishing by water-medium and visit sonar;
Second transmitting-receiving converting unit, it is electrically connected transducer, and the electric signal transmission that transducer exports by this second transmitting-receiving converting unit is to pre-amplifier unit, and the echoed signal of the shoal of fish target exported by power drive unit transfers to transducer;
Pre-amplifier unit, its input end is electrically connected the second transmitting-receiving converting unit, its output terminal is electrically connected the input end of electronic selection switch in control imitation processing module, and this pre-amplifier unit exports envelope detection unit and carrier frequency extraction unit to through electronic selection switch after amplifying electric signal;
Power drive unit, its input end is electrically connected the output terminal of electronic selection switch in control imitation processing module, its output terminal is electrically connected the second transmitting-receiving converting unit, and this power drive unit transfers to the second transmitting-receiving converting unit after the echoed signal of shoal of fish target being amplified.
Sonar target echo simulation system is visited in amphibian fishing as claimed in claim 1, it is characterized in that, the envelope signal of described shoal of fish target echo model generation shoal of fish target echo | p
b(t) |:
Described shoal of fish target echo model comprises:
First superposition module, its input end is electrically connected envelope detection unit and microcontroller, the envelope signal p of the shoal of fish target echo that this first superposition module inputs according to envelope detection unit
0(t), and the shoal of fish parameter of N number of different azimuth of microcontroller input, i.e. amplitude factor A
m, time delay factor τ
mand phase factor
(m=1,2 ... N), Output rusults
Second superposition module, its input end is electrically connected envelope detection unit and microcontroller, the envelope signal p of the shoal of fish target echo that this second superposition module inputs according to envelope detection unit
0(t), and the shoal of fish parameter of N number of different azimuth of microcontroller input, i.e. amplitude factor A
m, time delay factor τ
mand phase factor
(m=1,2 ... N), Output rusults
Modulo operation device, its input end is electrically connected the output terminal of the first superposition module and the second superposition module, its output terminal is electrically connected amplitude modulation unit, and the result of this modulo operation device to the first superposition module and the second superposition module carries out the envelope signal that modular arithmetic obtains shoal of fish echo | p
b(t) |.
The first described superposition module comprises:
N number of delayer, its input end is electrically connected envelope detection unit and microcontroller, incident wave envelope signal p
0(t) in delayer through time delay factor τ
mafter p
0(t-τ
m);
N number of sine operation device, its input end is electrically connected microcontroller, phase factor
after sine operation device
N number of multiplier, its input end is electrically connected microcontroller, and this multiplier is by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied;
Totalizer, its input end is electrically connected N number of multiplier, and its output terminal is electrically connected modulo operation device, and the result of N number of multiplier is carried out superposition and obtained by this totalizer
The second described superposition module comprises:
N number of delayer, its input end is electrically connected envelope detection unit and microcontroller, incident wave envelope signal p
0(t) in delayer through time delay factor τ
mafter p
0(t-τ
m);
N number of cos operation device, its input end is electrically connected microcontroller, phase factor
after cos operation device
N number of multiplier, its input end is electrically connected microcontroller, and this multiplier is by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied;
Totalizer, its input end is electrically connected N number of multiplier, and its output terminal is electrically connected modulo operation device, and the result of N number of multiplier is carried out superposition and obtained by this totalizer
The present invention can meet the electric signal harmony signal simulation of shoal of fish target echo simultaneously, realize the echo reflection simulation of amphibian shoal of fish target, thus replace the real shoal of fish to assess the performance that sonar is visited in fishing, not only save the development cost that sonar is visited in fishing, also shorten the lead time that sonar is visited in fishing, simultaneously can economical, save time, flexibly, accurately complete and sonar system maintenance and training are visited to fishing, therefore there is suitable practical value and significance.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram that sonar target echo simulation system is visited in amphibian fishing provided by the invention.
Fig. 2 is the circuit block diagram of shoal of fish target echo model in the present invention.
Embodiment
Following according to Fig. 1 and Fig. 2, illustrate preferred embodiment of the present invention.
As shown in Figure 1, the invention provides a kind of amphibian fishing and visit sonar target echo simulation system, comprise: control imitation processing module 303, and the first signal processing module 101 be electrically connected with control imitation processing module 303 respectively and secondary signal processing module 202.
First signal processing module 101 is directly visited sonar and is received and dispatched the electric signal interface unifying transducer and be connected with fishing, thus realize the electric signal emulation that sonar target echo is visited in fishing in laboratory on the bank, sonar realizes shoal of fish target echo acoustical signal emulation by water-medium is visited in secondary signal processing module 202 and fishing, control imitation processing module 303 switches between the first signal processing module 101 and secondary signal processing module 202, thus realizes the amphibious of fishing spy sonar target echo simulation system.
The first described signal processing module 101 comprises:
First transmitting-receiving converting unit 1, it is electrically connected the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing;
Input attenuation unit 2, its input end is electrically connected the first transmitting-receiving converting unit 1, and its output terminal is electrically connected control imitation processing module 303;
Output attenuatoin unit 3, its input end is electrically connected control imitation processing module 303, and its output terminal is electrically connected the first transmitting-receiving converting unit 1.
Described secondary signal processing module 202 comprises:
Transducer 14, it contacts water-medium;
Second transmitting-receiving converting unit 13, it is electrically connected transducer 14;
Pre-amplifier unit 11, its input end is electrically connected the second transmitting-receiving converting unit 13, and its output terminal is electrically connected control imitation processing module 303;
Power drive unit 12, its input end is electrically connected control imitation processing module 303, and its output terminal is electrically connected the second transmitting-receiving converting unit 13.
Described control imitation processing module 303 comprises:
Electronic selection switch 4, its input end is electrically connected the input attenuation unit 2 in the first signal processing module 101 and the pre-amplifier unit 101 in secondary signal processing module 202, and its output terminal is electrically connected the output attenuatoin unit 3 in the first signal processing module 101 and the power drive unit 12 in secondary signal processing module 202;
Microcontroller 5, its output terminal is electrically connected the input end of electronic selection switch 4;
Envelope detection unit 6, its input end is electrically connected the output terminal of electronic selection switch 4;
Shoal of fish target echo model 7, its input end is electrically connected the output terminal of envelope detection unit 6 and the output terminal of microcontroller 5;
Carrier frequency extraction unit 10, its input end is electrically connected the output terminal of electronic selection switch 4;
Doppler shift unit 9, its input end is electrically connected the output terminal of carrier frequency extraction unit 10 and the output terminal of microcontroller 5;
Amplitude modulation unit 8, its input end is electrically connected the output terminal of shoal of fish target echo model 7 and the output terminal of Doppler shift unit 9, and its output terminal is electrically connected the input end of electronic selection switch 4.
As shown in Figure 2, described shoal of fish target echo model 7 comprises:
First superposition module 71, its input end is electrically connected envelope detection unit 6 and microcontroller 5;
Second superposition module 73, its input end is electrically connected envelope detection unit 6 and microcontroller 5;
Modulo operation device 73, its input end is electrically connected the output terminal of the first superposition module 71 and the second superposition module 73, and its output terminal is electrically connected amplitude modulation unit 8.
The first described superposition module 71 comprises:
N number of delayer 711, its input end is electrically connected envelope detection unit 6 and microcontroller 5;
N number of sine operation device 712, its input end is electrically connected microcontroller 5;
N number of multiplier 713, its input end is electrically connected microcontroller 5;
Totalizer 714, its input end is electrically connected N number of multiplier 713, and its output terminal is electrically connected modulo operation device 73.
The second described superposition module 73 comprises:
N number of delayer 721, its input end is electrically connected envelope detection unit 6 and microcontroller 5;
N number of cos operation device 722, its input end is electrically connected microcontroller 5;
N number of multiplier 723, its input end is electrically connected microcontroller 5;
Totalizer 724, its input end is electrically connected N number of multiplier 723, and its output terminal is electrically connected modulo operation device 73.
Principle of work of the present invention is as follows:
When carrying out fishing in laboratory on the bank and visiting the electric signal emulation of sonar target echo, microcontroller 5 sends selects signal to make electronic selection switch 4 switch to the first signal processing module 101, that is: as shown in Figure 1, the logical relation of electronic selection switch 4 input end and output terminal is X1=X3 and X2 ≠ X3, and simultaneously Y1=Y3 and Y2 ≠ Y3 set up; First transmitting-receiving converting unit 1 connects the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing, and the single frequency carrier electric impulse signal exported by this interface transfers to input attenuation unit 2; Input attenuation unit 2 exports the single frequency carrier electric impulse signal after decay to envelope detection unit 6 and carrier frequency extraction unit 10 through electronic selection switch 4; The incident wave envelope signal p will obtained after envelope detection unit 6 pairs of single frequency carrier modulation signal demodulators
0t () exports shoal of fish target echo model 7 to; The carrier frequency of carrier frequency extraction unit 10 pairs of single frequency carrier electric impulse signals is measured and is exported Doppler shift unit 9 to after being extracted; Doppler shift unit 9 produces the carrier frequency signaling of echo according to the frequency shift parameters that microcontroller 5 transmits; Shoal of fish target echo model 7 receives shoal of fish parameter (the amplitude factor A of N number of different azimuth that microcontroller 5 transmits
m, the time delay factor τ of N number of different azimuth
mwith the phase factor of N number of different azimuth
) produce the envelope signal of shoal of fish echo afterwards | p
b(t) |; The envelope signal of shoal of fish echo | p
b(t) | after the carrier frequency signaling of amplitude modulation unit 8 pairs of echoes is modulated, form the electric echo signal of shoal of fish target; The electric echo signal of shoal of fish target transfers to output attenuatoin unit 3 after electronic selection switch 4; Output attenuatoin unit 3 is transferred to through the first transmitting-receiving converting unit 1 electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing after suitably being decayed by the electric echo signal of shoal of fish target again.
With fishing visit sonar by water-medium realize shoal of fish target echo acoustical signal emulation time, microcontroller 5 sends selects signal to make electronic selection switch 4 switch to secondary signal processing module 202, that is: as shown in Figure 1, the logical relation X2=X3 of electronic selection switch 4 input end and output terminal and X1 ≠ X3, Y2=Y3 and Y1 ≠ Y3 set up simultaneously; Transducer 14 receives fishing by water-medium and visits the acoustical signal that sends of sonar and transfer to pre-amplifier unit 11 through the second transmitting-receiving converting unit 13 after being converted into faint electric signal; Envelope detection unit 6 and carrier frequency extraction unit 10 is exported to through electronic selection switch 14 after pre-amplifier unit 11 pairs of electric signal amplify; The incident wave envelope signal p will obtained after the 6 pairs of electric signal detections of envelope detection unit
0t () exports shoal of fish target echo model 7 to; The carrier frequency of carrier frequency extraction unit 10 pairs of electric signal is measured and is exported Doppler shift unit 9 to after being extracted; Doppler shift unit 9 produces the carrier frequency signaling of echo according to the frequency shift parameters that microcontroller 5 transmits; Shoal of fish target echo model 7 receives shoal of fish parameter (the amplitude factor A of N number of different azimuth that microcontroller 5 transmits
m, the time delay factor τ of N number of different azimuth
mwith the phase factor of N number of different azimuth
) produce the envelope signal of shoal of fish echo afterwards | p
b(t) |; The envelope signal of shoal of fish echo | p
b(t) | after the carrier frequency signaling of amplitude modulation unit 8 pairs of echoes is modulated, form the echoed signal of shoal of fish target; The echoed signal of shoal of fish target transfers to power drive unit 12 after electronic selection switch 4; Power drive unit 12 feeds back to fishing spy sonar by encouraging transducer 14 to be converted to underwater sound signal through the second transmitting-receiving converting unit 13 again after the amplification of the echoed signal of shoal of fish target by water-medium.
As shown in Figure 2, described shoal of fish target echo model is for generating the envelope signal of shoal of fish target echo | p
b(t) |, wherein, the shoal of fish parameter of N number of different azimuth, i.e. amplitude factor A
m, time delay factor τ
mand phase factor
(m=1,2 ... N) the first superposition module 71 and the second superposition module 72 is inputed to by microcontroller 5 respectively; In the first superposition module 71: incident wave envelope signal p
0(t) in delayer 711 through time delay factor τ
mafter p
0(t-τ
m); Phase factor
after sine operation device 712
utilize multiplier 713 by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied, and result obtains after totalizer 714 carries out superposition
in the second superposition module 72: incident wave envelope signal p
0(t) in delayer 721 through time delay factor τ
mafter p
0(t-τ
m); Phase factor
after cos operation device 722
utilize multiplier 723 by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied, and result obtains after totalizer 724 carries out superposition
finally, the result of the first superposition module 71 and the second superposition module 72 is sent to modulo operation device 73 respectively, just obtains the envelope signal of shoal of fish echo, namely after carrying out modular arithmetic
In the present embodiment, the model of the first transmitting-receiving converting unit 1 is IN4007, the model of input attenuation unit 2 is T-shaped resistor network, the model of output attenuatoin unit 3 is T-shaped resistor network, the model of electronic selection switch 4 is CD4053, the model of microcontroller 5 is ARM Cortox-M4, the model of envelope detection unit 6 is IN4148, the model of shoal of fish target echo model 7 is EPM1270, the model of amplitude modulation unit 8 is MC1496, the model of Doppler shift unit 9 is AD9850, the model of carrier frequency extraction unit 10 is LM393, the model of pre-amplifier unit 11 is AD8002, the model of power drive unit 12 is NTP18N06, the model of the second transmitting-receiving converting unit 13 is IN4007, the model of transducer 14 is DYW-1M.
The present invention can meet the electric signal harmony signal simulation of shoal of fish target echo simultaneously, realize the echo reflection simulation of amphibian shoal of fish target, thus replace the real shoal of fish to assess the performance that sonar is visited in fishing, not only save the development cost that sonar is visited in fishing, also shorten the lead time that sonar is visited in fishing, simultaneously can economical, save time, flexibly, accurately complete and sonar system maintenance and training are visited to fishing, therefore there is suitable practical value and significance.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. sonar target echo simulation system is visited in an amphibian fishing, it is characterized in that, comprise: control imitation processing module (303), and the first signal processing module (101) be electrically connected with control imitation processing module (303) respectively and secondary signal processing module (202);
First signal processing module (101) is directly visited sonar and is received and dispatched the electric signal interface unifying transducer and be connected with fishing, the single frequency carrier electric impulse signal that electric signal interface fishing being visited sonar transmitting-receiving unification transducer exports inputs to control imitation processing module (303) and processes, after control imitation processing module (303) generates the electric echo signal of shoal of fish target, feedback exports the first signal processing module (101) to, thus realizes fishing in laboratory on the bank and visit the electric signal emulation of sonar target echo;
Secondary signal processing module (202) contact water-medium, the fishing received by water-medium is visited the acoustical signal that sends of sonar to be converted to electric signal and to input to control imitation processing module (303) and process, after control imitation processing module (303) generates the electric echo signal of shoal of fish target, feedback exports secondary signal processing module (202) to, is realized the acoustical signal emulation of shoal of fish target echo by water-medium;
Control imitation processing module (303) switches between the first signal processing module (101) and secondary signal processing module (202), thus realizes the amphibious of fishing spy sonar target echo simulation system;
Described control imitation processing module (303) comprises:
Electronic selection switch (4), it is electrically connected the first signal processing module (101) and secondary signal processing module (202), and this electronic selection switch (4) input signal completed between the first signal processing module (101) and secondary signal processing module (202) switches and output signal switches;
Microcontroller (5), its output terminal is electrically connected the input end of electronic selection switch (4), this microcontroller (5) sends selects signal to electronic selection switch (4), control electronic selection switch (4) and carry out signal switching, and by the amplitude factor A of N number of different azimuth
m, the time delay factor τ of N number of different azimuth
mwith the phase factor of N number of different azimuth
send to shoal of fish target echo model (7), frequency shift parameters is sent to Doppler shift unit (9);
Envelope detection unit (6), its input end is electrically connected the output terminal of electronic selection switch (4), and this envelope detection unit (6) is to the incident wave envelope signal p will obtained after input signal detection
0t () exports shoal of fish target echo model (7) to;
Shoal of fish target echo model (7), its input end is electrically connected the output terminal of envelope detection unit (6) and the output terminal of microcontroller (5), and this shoal of fish target echo model (7) receives the amplitude factor A of N number of different azimuth that microcontroller (5) transmits
m, the time delay factor τ of N number of different azimuth
mwith the phase factor of N number of different azimuth
the envelope signal of rear generation shoal of fish echo | p
b(t) |;
Carrier frequency extraction unit (10), its input end is electrically connected the output terminal of electronic selection switch (4), and this carrier frequency extraction unit (10) carrier frequency to input signal is measured and exported Doppler shift unit (9) to after being extracted;
Doppler shift unit (9), its input end is electrically connected the output terminal of carrier frequency extraction unit (10) and the output terminal of microcontroller (5), and this Doppler shift unit (9) produces the carrier frequency signaling of echo according to the frequency shift parameters that microcontroller (5) transmits;
Amplitude modulation unit (8), its input end is electrically connected the output terminal of shoal of fish target echo model (7) and the output terminal of Doppler shift unit (9), its output terminal is electrically connected the input end of electronic selection switch (4), the envelope signal p of the shoal of fish echo that shoal of fish target echo model (7) produces
bt () modulates the electric echo signal of rear formation shoal of fish target in this amplitude modulation unit (8) to the carrier frequency signaling of the echo that Doppler shift unit (9) produces.
2. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 1, and it is characterized in that, described the first signal processing module (101) comprises:
First transmitting-receiving converting unit (1), it is electrically connected the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing, the single frequency carrier electric impulse signal that the electric signal interface that sonar transmitting-receiving unification transducer is visited in fishing by this first transmitting-receiving converting unit (1) exports transfers to input attenuation unit (2), and the electric echo Signal transmissions exported by output attenuatoin unit (3) visits the electric signal interface of sonar transmitting-receiving unification transducer to fishing;
Input attenuation unit (2), its input end is electrically connected the first transmitting-receiving converting unit (1), its output terminal is electrically connected the input end of electronic selection switch (4) in control imitation processing module (303), and this input attenuation unit (2) exports the single frequency carrier electric impulse signal after decay to envelope detection unit (6) and carrier frequency extraction unit (10) through electronic selection switch (4);
Output attenuatoin unit (3), its input end is electrically connected the output terminal of electronic selection switch (4) in control imitation processing module (303), its output terminal is electrically connected the first transmitting-receiving converting unit (1), and this output attenuatoin unit (3) exports the first transmitting-receiving converting unit (1) to after suitably being decayed by the electric echo signal of shoal of fish target.
3. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 1, and it is characterized in that, described secondary signal processing module (202) comprises:
Transducer (14), it contacts water-medium, this transducer (14) receives fishing by water-medium and visits the acoustical signal that sends of sonar and be converted into faint electric signal, and the echoed signal of the shoal of fish target the second transmitting-receiving converting unit (13) exported is converted to underwater sound signal feeds back to fishing by water-medium and visit sonar;
Second transmitting-receiving converting unit (13), it is electrically connected transducer (14), the electric signal transmission that transducer (14) exports by this second transmitting-receiving converting unit (13) is to pre-amplifier unit (11), and the echoed signal of the shoal of fish target exported by power drive unit (12) transfers to transducer (14);
Pre-amplifier unit (11), its input end is electrically connected the second transmitting-receiving converting unit (13), its output terminal is electrically connected the input end of electronic selection switch (4) in control imitation processing module (303), and this pre-amplifier unit (11) exports envelope detection unit (6) and carrier frequency extraction unit (10) to through electronic selection switch (14) after amplifying electric signal;
Power drive unit (12), its input end is electrically connected the output terminal of electronic selection switch (4) in control imitation processing module (303), its output terminal is electrically connected the second transmitting-receiving converting unit (13), and this power drive unit (12) transfers to the second transmitting-receiving converting unit (13) after the echoed signal of shoal of fish target being amplified.
4. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 1, it is characterized in that, the envelope signal of described shoal of fish target echo model generation shoal of fish target echo | p
b(t) |:
5. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 4, and it is characterized in that, described shoal of fish target echo model (7) comprises:
First superposition module (71), its input end is electrically connected envelope detection unit (6) and microcontroller (5), the envelope signal p of the shoal of fish target echo that this first superposition module (71) inputs according to envelope detection unit (6)
0(t), and the shoal of fish parameter of N number of different azimuth that microcontroller (5) inputs, i.e. amplitude factor A
m, time delay factor τ
mand phase factor
(m=1,2 ... N), Output rusults
Second superposition module (73), its input end is electrically connected envelope detection unit (6) and microcontroller (5), the envelope signal p of the shoal of fish target echo that this second superposition module (73) inputs according to envelope detection unit (6)
0(t), and the shoal of fish parameter of N number of different azimuth that microcontroller (5) inputs, i.e. amplitude factor A
m, time delay factor τ
mand phase factor
(m=1,2 ... N), Output rusults
Modulo operation device (73), its input end is electrically connected the output terminal of the first superposition module (71) and the second superposition module (73), its output terminal is electrically connected amplitude modulation unit (8), and the result of this modulo operation device (73) to the first superposition module (71) and the second superposition module (72) carries out the envelope signal that modular arithmetic obtains shoal of fish echo | p
b(t) |.
6. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 5, and it is characterized in that, the first described superposition module (71) comprises:
N number of delayer (711), its input end is electrically connected envelope detection unit (6) and microcontroller (5), incident wave envelope signal p
0(t) in delayer (711) through time delay factor τ
mafter p
0(t-τ
m);
N number of sine operation device (712), its input end is electrically connected microcontroller (5), phase factor
after sine operation device (712)
N number of multiplier (713), its input end is electrically connected microcontroller (5), and this multiplier (713) is by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied;
Totalizer (714), its input end is electrically connected N number of multiplier (713), its output terminal is electrically connected modulo operation device (73), and the result of N number of multiplier (713) is carried out superposition and obtained by this totalizer (714)
7. sonar target echo simulation system is visited in amphibian fishing as claimed in claim 5, and it is characterized in that, the second described superposition module (73) comprises:
N number of delayer (721), its input end is electrically connected envelope detection unit (6) and microcontroller (5), incident wave envelope signal p
0(t) in delayer (721) through time delay factor τ
mafter p
0(t-τ
m);
N number of cos operation device (722), its input end is electrically connected microcontroller (5), phase factor
after cos operation device (722)
N number of multiplier (723), its input end is electrically connected microcontroller (5), and this multiplier (723) is by amplitude factor A
m, p
0(t-τ
m) and
three is multiplied;
Totalizer (724), its input end is electrically connected N number of multiplier (723), its output terminal is electrically connected modulo operation device (73), and the result of N number of multiplier (723) is carried out superposition and obtained by this totalizer (724)
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