Hydroacoustic polygon

 

(57) Abstract:

The invention relates to the field of hydro-acoustics and can be used to measure parameters of the primary and secondary fields of the craft. Essence: the water area, enclosed by the coastline from sea waves and winds, equipped with sonar tool measurements and wideband sonar emitters, including pulse emitter. Hydroacoustic polygon includes pulsed red and (or) infrared lasers, the emissivity of the heads of which are arranged around the receiving part of the working measuring instruments, and a pulsed source of electromagnetic energy. This embodiment of the polygon allows you to determine not only the parameters of vocalization boats, but the margin settings, reflected and scattered from the boats, as well as "own" the frequency of the latter. Using lasers in hydroacoustic polygon around the working measurement means is formed Svobodny channel, allowing you to make the most of the weak acoustic signals emitted and re-radiated by the craft. 5 C.p. f-crystals, 2 Il.

The invention relates to the field of hydro-acoustics and can be used for izmeljchenie polygons [1, 2] for measuring acoustic fields of watercraft, including water area, enclosed by the coastline from sea waves and winds, hydroacoustic working instrument, and auxiliary boats and equipment. Any of the known polygon, for example [2], can be adopted for the prototype.

The disadvantage of the prototype is limited its application only to the case of measurement of the parameters of the primary fields of the craft, i.e., the parameters of its own noise sources.

The technical result from implementation of the invention is to enhance the functionality of the polygon in the case of measurement of parameters of the secondary field craft, i.e., the parameters of the radiation reflected and scattered from the boats.

This technical result is achieved due to the fact that in the known sonar polygon (SE) for measuring acoustic fields boats, including the water area enclosed by the coastline from sea waves and winds, hydroacoustic working measuring instrument (RCI), as well as auxiliary vessels and equipment further comprises a broadband system gadamigo boats and the receiving part of RCI.

In addition, the RSI can be equipped with pulse red or infrared lasers, measuring heads which are arranged around its receiving part, and the directivity of the laser is parallel to the directional characteristic of RCI.

The reception part of the RSI can be attached cable cable to survey craft, and power, processing and recording equipment located in the survey of the craft.

Wideband sonar emitters includes ultrasonic, sonic and infrasonic emitters, and a pulse emitter.

SE may also include a pulsed source of electromagnetic energy with a directivity oriented along the route surveyed boats.

The invention is illustrated by drawings. In Fig.1 presents a diagram of WTP located stationary RCI bottom of the reservoir of Fig.2 - scheme of SE with tow RCI.

Hydroacoustic polygon includes water area 1 (Fig.1), a closed shoreline 2 from sea waves and winds, hydroacoustic working tool 3 measurements (FSW 3) located in or on the bottom 4 of the reservoir 1 rabatyvaya and recording equipment in the first case (Fig. 1) is located on the coastal apparatus 7, which is connected by a cable 8 with RCI 3, and in the second case (Fig.2) craft 6 or on the same coast apparatus 7. Then the information from the PC 3 is transmitted to the onshore equipment 7 first cable-the cable 9, and then over the air, for which the craft 6 and coastal apparatus 7 provided with receiving and transmitting devices with antennas 9, 10.

SE also provides broadband system 11 hydroacoustic radiators, including ultrasonic, sonic and infrasonic radiators and pulse emitter (not shown). The power and control equipment systems 11 hydroacoustic radiators is part of the coastal apparatus 7. The electrical connection of the respective blocks carried by cable 12.

SE may also include a pulse source 13 of electromagnetic energy with a directivity oriented along the route surveyed boats 6.

RCI polygon can also be equipped with a pulse of red, such as ruby, or infrared, for example, the neodymium lasers 14, the emissivity of the heads of which are arranged around its admissions tx2">

The power and control equipment emitters 13 and the laser 14 may be located on the coastal apparatus 15, equipped with radio transmitting device with a radio antenna 16, the electrical connection of the respective blocks are carried on the cables 17, 18.

In addition, the SE includes auxiliary vessels and equipment, such as sonar and light beacons, measuring distances, etc., (not shown).

SE for measuring acoustic fields is as follows.

The target craft 6 are sent to different modes by RCI 3 (Fig. 1). When the craft 6 traversing distance RCI 3, which is typically 50 m, using RCI 3 carry out the measurement noise boats, using his curve passes [3].

In the second variant (Fig.2) parameters of vocalization boats 6 is measured using the temporal characteristics of the received RCI 3 acoustic signal.

For measuring parameters of the secondary acoustic field using sonar emitters 11 are simultaneously irradiated craft 6 and RCI 3 sequentially at different frequencies and take FSW 3 emission pulses. For this purpose it is also possible modulation of the acoustic radiation emitters 11.

Then using a pulse emitter, for example, electric-type guide to craft 6 acoustic signal "shock" type, with which the craft 6 starts "ringing" on their own frequencies taken RCI 3. Natural frequency of the craft, it is advisable to determine on the move, and stop the boats.

Using the pulse source 13 of electromagnetic radiation to produce radiation and heating of the hull boats 6. The latter will emit secondary acoustic waves received RCI 3.

All received RCI 3, the signals undergo processing and registration in blocks onshore equipment 7. For synchronization of measurements and information transfer use the air, and undersea communications cables.

If the measured acoustic signals are weak, for their reception using artificially generated using a pulsed lasers 14 Svobodny channel 19.

Upon irradiation of the aquatic environment by laser radiation in the red or infrared range, for example at wavelengths ruby or neodymium l is altnoy core along which, almost without relaxing the spread of hydroacoustic signals from the craft 6 to RCI 3.

Svobodny channel 19 at the same time, it protects the useful signal and hydroacoustic noise.

Thus, the use of hydroacoustic polygon can significantly extend the functionality of the prototype due to the measurement in addition to the parameters of the primary fields, and parameters of the secondary field craft.

Sources of information

1. P. J. Urik. Fundamentals of hydro-acoustics. -Leningrad: Sudostroenie, 1978, S. 344-347.

2. Bykhovsky, E. , Pokrovsky Century A. Hydroacoustic measurements. -Leningrad: Sudostroenie, 1971, S. 98-101 prototype.

3. Evtuhov A. P., Kolesnikov, L. E., and others, Handbook of underwater acoustics. -Leningrad: Sudostroenie, S. 222-224.

1. Sonar testing ground for measuring acoustic fields boats, including the water area enclosed by the coastline from sea waves and winds, hydroacoustic working instrument, and auxiliary vessels and equipment, characterized in that it further comprises a broadband system hydroacoustic radiators with characteristices measuring tools.

2. The polygon p. 1, characterized in that the hydroacoustic working measuring instrument is supplied with a pulse of red or infrared lasers, the emissivity of the heads of which are arranged around its receiving part, and the directivity of the laser is parallel to the directional characteristic of the working measuring instruments.

3. The ground under item 1 or 2, characterized in that the receiving portion of the working measuring instruments attached to the cable by a cable to a survey craft, and power, processing and recording equipment located on the craft.

4. The polygon p. 1, or 2, or 3, wherein the wideband sonar emitters includes ultrasonic, sonic and infrasonic radiators.

5. The polygon p. 1, or 2, or 3, or 4, characterized in that the wideband sonar emitters includes a pulse emitter.

6. The polygon p. 1 or 2 or 3 or 4 or 5, characterized in that it comprises a pulsed source of electromagnetic energy with a directivity oriented along the route surveyed boats.

 

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