Device for estimating characteristic of direction of hydro-acoustic emitter (variants)

FIELD: hydro-acoustics, possible use for express estimation of characteristic of direction of hydro-acoustic emitter.

SUBSTANCE: in accordance to first variant of manufacture, in front of hydro-acoustic emitter, hydro-acoustic receiver is positioned, made in form of grid of sound-sensitive elements. The latter is in its turn made in form of object filament coil of wave-optical interference meter, supporting filament coil of which is mounted also in liquid, but outside the emission field of hydro-acoustic emitter. Also, device additionally has position indicator of hydro-acoustic emitter and electronic circuit for separating maximal input signal with increase in distance between hydro-acoustic receiver and hydro-acoustic emitter. It occurs during filling of all cells of hydro-acoustic receiver with radiation field of hydro-acoustic emitter. Knowing the theory of experiment, estimation of opening angle of main petal of characteristic of direction of hydro-acoustic emitter is performed. In accordance to second variant of device manufacture, in additionally includes hydro-acoustic receiver scanner in grid plane. When at output of interference meter signal appears with scanning frequency of hydro-acoustic receiver in process of approach of hydro-acoustic emitter and hydro-acoustic receiver, estimation of thin structure of characteristic of direction of hydro-acoustic emitter is performed, i.e. presence of additional petals within complete characteristic of direction of hydro-acoustic emitter.

EFFECT: removed flaws of prototype, simplified construction.

2 cl, 4 dwg

 

The invention relates to the field of hydro-acoustics and can be used for rapid assessment of directivity sonar emitter.

A known device for automatic reception directivity hydroacoustic radiator, made in the form of an expandable relative to each other of the emitter and the radiation receiver with the corresponding secondary and recording equipment [1].

A disadvantage of the known analogue of [1] is the limit of its validity by measuring the directivity characteristics of the emitters in a horizontal plane.

A device for evaluating the performance orientation of the sonar emitter (HGI)containing hydroacoustic receiver (SE), in the form of a grating sound-sensitive element installed in the liquid front used hydroacoustic radiator (GI), mounted for axial pivot relative to the plane of the lattice, as well as the amplifier and recorder [2]. This unit is adopted for the prototype.

In the prototype, the gap made in the form of so-called lattice Troth, smokeproducing lattice of large size, made up of groups of point transducers, the sensitivity of which varies according to a certain law.

The disadvantage of the prototype is the difficulty it is realizatsii and settings.

The technical result from implementation of the invention is to eliminate the disadvantages of the prototype, i.e. the simplification of its practical implementation.

The technical result in the first embodiment of the reach due to the fact that in the known device for evaluating HNGI that contain SE in the form of a grating sound-sensitive element installed in the liquid front is used KI, mounted for axial pivot relative to the plane of the lattice, as well as the amplifier and recorder, grating sound-sensitive elements made in the form of the subject fiber coil of fiber-optic interferometer, the reference fiber coil which is installed in the liquid, but outside of the radiation field GUY, and the source and receiver coherent light interferometer installed in an air environment, the subject of the fiber coil is made with the possibility of misalignment of the investigated emitter and with the possibility of scanning in the plane of the lattice, and the reference fiber coil installed phase-shifting element, and the device additionally introduced position sensor grating relative to the emitter, two divider, extremestor and the unit of reference voltages, and the output of the photodetector is connected through an amplifier to the first input of the divider, a second input which also is dinen to the output of the position sensor, and exit through extremestor - managed to the input of the position sensor, the first input of the second divider connected to the output of the reference voltage, the second output of the position sensor and the output to the logger.

The technical result in the second embodiment of the reach due to the fact that in the known device, containing a sonar receiver in the form of a grating sound-sensitive element installed in the liquid in front of the examinee hydroacoustic radiator with the possibility of axial pivot relative to the plane of the lattice, as well as the amplifier and recorder, grating sound-sensitive elements made in the form of the subject fiber coil of fiber-optic interferometer, the reference fiber coil which is installed in the liquid, but outside of the radiation field acoustic emitter, and the source and receiver coherent light interferometer installed in an air environment, the subject of the fiber coil is arranged to bias regarding the investigated emitter, and the reference fiber coil installed phase-shifting element, and the device further introduced the scanner sonar receiver in the plane of the grating sensing elements controlled resonant filter frequency scanning, chaston the second indicator, the divider block reference voltages and the position sensor grid, and the output of the amplifier through a resonant filter connected to the frequency indicator, the electrical output of the scanner is connected with a controlled input resonant filter, the output of the position sensor is connected to the second input of the divider, the first input connected to the output of reference voltages, and the output from the logger.

The invention is illustrated by drawings. Figure 1 shows the General diagram of a device that implements two variants of its implementation, figure 2 - electron-optical scheme SE; figure 3 and 4 are diagrams explaining the principle of operation of the device.

The system for assessing HNGA contains (1) HP in the form of a grating sound-sensitive element, made for example in the form of a rectangular meander. GP made in the form of the subject fiber coil 2 (2) fiber-optic interferometer, the reference fiber coil 3 which is (as the subject in the liquid), for example, in sonar pool (not shown), but outside of the radiation field 4 (1) GI.

HE set with holder 6 and Reiter 7 on the guide 8 can be rotated in vertical and horizontal planes respectively in the planes xz and xy).

HP also installed on the rail 8 with the holder 9 and Reiter 10. GP performed in the possibility offsets GI along the guide rails 8 (x-direction) and with the possibility of scanning in the y-direction and z (scanner 1 is not shown). GP equipped with a sensor 11, the position of the grating relative to GI, calibrated in units of length.

The optical scheme of the device (figure 2) includes a coherent light source 12 and photodetector 13, and the phase-shifting element 14 mounted in the support coil 3.

The electric circuit device includes an amplifier 15, a divider 16, extremestor 17, the divider 18 and block 19 reference voltages. Thus the output of the photodetector 13 is connected through an amplifier 15 to the first input of the divider 16, the second input is connected to the output of the sensor 11, and output to Extremadura 17.

The output of Extremadura 17 is connected with a controlled input of the position sensor 11, the output of which is connected to the second input (input divider) divider 18, the first input (the dividend) which is connected to the output unit 19 reference voltages and the output to the Registrar, made in the form of evaluator angle α solution of HGI (figure 1).

In addition, the device further comprises a scanner 20 (2) GP in the plane of the grating sensing elements controlled resonant filter 21 on the scanning frequency and the switch 22 mounted on the output of the amplifier 15.

The switch 22 in position and connects the amplifier 15 to the first input of the divider 16, and the position disables the amplifier 15 of the divider 16 and connects the amplifier 15 through a resonant filter 2 to the frequency indicator (not shown). Unit 19 reference voltages perform duplex, automatically or manually switched from level to level when the switch 22 from the position (a) position b). (Currently on the drawing is not displayed).

Thus, the position and the switch 22 is implemented by the device according to the first claim. And in the situation) switch 22 is implemented by the device according to the second claim. That is, the drawing shows the implementation of both options.

The system for assessing HNGI works as follows.

Set HP, made in the shape of a rectangular waveform with a total length and width of the sides L and with the size of the square cells of l, in position (a) (1) opposite GI in field 4 of its radiation at a distance of x1from him.

Set the operating point E on the curve 23 (3) of the interferometer with phase-shifting element 14 (figure 2) in the initial phase difference of the interfering beams is equal toset the switch in position a).

Include investigational GI at a given frequency of the harmonic signal and begin to move GP right from GI along the x-axis. When the output signal of the position sensor 11 will increase. And on the magnitude of the signal of the interferometer will be affected simultaneously by two PR the process. The signal will increase as the cell fill meander field 4 radiation GI, and on the other hand, to decrease due to the removal GP from GI.

The signal of the interferometer with the photodetector 13 (2) via the amplifier 15 is fed to the first input (the dividend) of the divider 16, the second input of which (the divisor) signal from the position sensor 11. The output of the divider 16 is obtained an output signal of the interferometer is adjusted relative change of the distance x between the transmitter 5 and receiver 1.

By increasing the distance x between GI and GP gradual filling in field 4 of the radiation of an increasing number of cells meander GP, and when the distance X2(1) all cells meander filled field 4 radiation GI.

Up to this point the signal from the divider 16 is increased and you reach a distance x2reaches its maximum. Extremestor 17 monitors the appearance of this maximum in the signal 24 (Fig 3) and forwards at this moment on a managed sensor input 11 position command signal to terminate further movement GP.

Knowing the distance value x2between GI and GP and the size L of the meander (figure 1), we can estimate the angle α solution of the main lobe of HNGI. From figure 4 it follows thatThis value is obtained after dividing the constant valueasked by block reference voltages 19, on the value of x2issued by the sensor 11 to the position at the moment the maximum value of the output signal of the interferometer, normalized relative to the distance x. The division is performed in the divider 18. Registrar (not shown) reproduces the angle α solution of the main lobe of HNGI in a user-friendly operator.

In figure 1 the dashed line shows the degree of filling of the meander GP in position a and B. figure 3 under item 24 shows an example of changes of the input signal supplied to the interferometer at the change of coordinates x and under item 25 - change of the output signal of the interferometer when the change in x-coordinates. Points C and D on the curve 23 of the interferometer characterize the extreme points on the curve 23 of the interferometer and set the limit of quasi-linear conversion of the input signal 24.

The distance x between the emitter and the receiver are chosen so that HNGI fully formed and did not depend on further increasing x.

For the evaluation of the fine structure of HGI (for example, the availability of additional petals inside directivity (figure 1)receiver 1 switch switch 22 in position) and move in the opposite direction (to the radiator) and simultaneously scan it in the yz plane with an amplitude of order l is the cell size of the meander (figure 1). At the moment of appearance with the drove at the output of the interferometer with a scanning frequency is determined by the angle where x3- the distance between the acoustic transmitter and receiver, given by the sensor 11, for the considered time (in the drawing, x3not marked). This frequency is allocated by the filter 21 is configured automatically to the frequency of scanning of the scanner 20 (figure 2). Unit 19 reference voltages in this case outputs a signal, which value. This procedure is repeated at different angles of rotation GI and different radiation frequencies of the sound wave.

Thus, unlike the prototype, HGI is estimated at more than a simple device, made on the basis of one fiber-optic interferometer.

Sources of information

1. The GDR patent No. 206435, CL G 01 R 29/10, 1984.

2. Kolesnikov A. Acoustic measurements. Leningrad: Sudostroenie, 1983, p.132-133 - prototype.

1. The device for evaluating the performance orientation of the sonar emitter containing a sonar receiver in the form of a grating sound-sensitive elements mounted in the liquid in front of the examinee hydroacoustic radiator, mounted for axial pivot relative to the plane of the lattice, as well as the amplifier and recorder, characterized in that the lattice sensitive elements in the form of the subject fiber spool fiber optic is on the interferometer, the reference fiber coil which is installed in the liquid, but outside of the radiation field acoustic emitter, and the source and receiver coherent light interferometer installed in an air environment, the subject of the fiber coil is made with the possibility of misalignment of the investigated emitter, and the reference fiber coil installed phase-shifting element, and the device additionally introduced position sensor grating relative to the emitter, two divider, extremestor, block reference voltages, and the output of the photodetector is connected through an amplifier to the first input of the first divider, the second input is connected to the output of the position sensor, and the output through extremestor - managed entrance position sensor the first input of the second divider connected to the output of the reference voltage, the second output of the position sensor and the output to the logger.

2. The device for evaluating the performance orientation of the sonar emitter containing a sonar receiver in the form of a grating sound-sensitive element installed in the liquid in front of the examinee hydroacoustic radiator with the possibility of axial pivot relative to the plane of the lattice, as well as the amplifier and recorder, characterized in that the lattice sensitive elements vol is Lana as the subject of a fiber coil of a fiber-optic interferometer the reference fiber coil which is installed in the liquid, but outside of the radiation field acoustic emitter, and the source and receiver coherent light interferometer installed in an air environment, the subject of the fiber coil is made with the possibility of misalignment of the investigated emitter, and the reference fiber coil installed phase-shifting element, and the device further introduced the scanner sonar receiver in the plane of the grating sensing elements controlled resonant filter frequency scan, frequency indicator, the divider block reference voltages and the position sensor grid, and the output of the amplifier through a resonant filter connected to the frequency indicator, the electrical output of the scanner is connected with a controlled the input resonant filter, the output of the position sensor is connected to the second input of the divider, the first input connected to the output of reference voltages, and the output from the logger.



 

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