KR0175771B1 - Line array with submux part Manual dolls Underwater acoustic detector Sound sensor part - Google Patents

Abstract

The present invention relates to a vibration isolating module and a tail rope assembly for attenuating vibrations generated around a sound sensor portion to prevent capture of a bad signal or the like; A sound module for converting sound generated from a sound source in the water into an electrical signal; And a signal transmission module including a main mux part for converting an analog signal from the sound module into a digital signal and multiplexing and transmitting the digital signal. A towing cable for connecting the acoustic sensor unit to the shipboard; And a data processing unit for classifying, searching, and processing the electrical signal data from the signal processing unit, wherein the signal processing unit for processing the acoustic signal from the acoustic sensor unit comprises: The sound sensor unit of the sonar underwater sonar system includes: a plurality of sound modules for sensing sound in water; A filter unit connected to a rear end of each of the acoustic modules to remove noise of the acoustic signals from the acoustic modules and adjust a pass band of the acoustic signals; A sub mux connected to the filter unit for multiplexing acoustic signals from the plurality of sound modules; A differential amplifier connected to a rear end of the sub mux to convert an output of the sub mux into a single-ended mode; A gain controller connected to a rear end of the differential amplifier for controlling an output gain of the acoustic signal; A power supply unit for receiving power from the ship and supplying the power to the acoustic sensor unit; And a current driver for converting the output of the multiplexed acoustic signal voltage output through the gain control unit into a current output and outputting the current output to the main mux unit. Thus, by providing an acoustic sensor unit using a plurality of channels, It is possible to faithfully protect the original signal from the influence of the noise introduced from the line in the case where the noise is introduced.

Description

Line array with submux part Manual dolls Underwater acoustic detector Sound sensor part

More particularly, the present invention relates to a method of multiplexing signals of a plurality of sound modules constituting a sound sensor unit using a submix and transmitting the multiplexed signals to a main mixer The present invention relates to an acoustic sensor unit.

In general, an acoustic detector for detecting an acoustic signal in the water and detecting an accurate position of the acoustic source, and a method for sensing a sound wave in the water includes an active sonar for receiving the reflection of the acoustic energy from the object, (Sonar) method, and a passive sonar system that receives only acoustic energy emitted from other sources.

FIG. 1 is a block circuit diagram schematically showing a general acoustic detector. The acoustic detector system includes an acoustic sensor unit for sensing an acoustic signal in water, converting the acoustic signal into an electrical analog signal, converting the analog signal into a digital signal, (300); A towing cable 200 for connecting the acoustic sensor unit 300 to the cabin; And a cabin (100) connected to the acoustic sensor unit (300) by the towing cable (200).

The ship 100 also includes a signal processor 120 for transferring electrical signals received from the acoustical sensor 300 and a data processor 110 for classifying, searching and processing the electrical signal data received from the signal processor 120 And controls the sound sensor unit 300.

In addition, the acoustic sensor unit 300 includes a vibration isolation module 310 for attenuating vibrations generated around the acoustic sensor unit 300 to prevent capture of a noise signal, A sound transmission module 320 for converting and transmitting sound signals, a sound module 330 for sensing sound signals, and a tail rope assembly 340 for attenuating the vibration finally.

The acoustic module 300 comprises an acoustic module 330 for receiving acoustic signals in the water and converting the acoustic signals into electrical signals while removing seawater noise flowing through the signals, (Hydrophone) 331 for receiving an acoustic signal of the seabed and converting it into an electric signal, a pre-amplifier 332 for amplifying a fine signal, and a preamplifier 332 as an overcurrent A roll sensor 335 and 335a for sensing the inclination of the sound sensor unit 300 and a sea noise correction circuit for compensating for noise due to seawater, An orientation sensor 338 for measuring the orientation of the acoustic sensor unit 300 and an orientation sensor 338 for measuring the orientation of the acoustic sensor unit 300. [ And a test controller 336 for testing the presence or absence of the test signal.

The operation of the acoustic sensor unit 300 having the above-described structure will be described in detail as follows.

The underwater sound is propagated by the mechanical close action of the seawater particles and this vibration causes a volume change in the water hammer 331 to a size which is directly proportional to the product of the square of the frequency and the amplitude and the water hammer 331 has the volume And generates an electrical signal corresponding to an electric waveform that is the same as the sound wave in response to the change.

The change in the electrical signal may be expressed in the form of a change in current or voltage. It is necessary to match the impedance of the output terminal of the hydrophone 331 with the impedance of the preamplifier 332 in order to transmit the change of the electrical signal over a long distance with maximum efficiency, The signal can be sent away.

The electrical signal thus processed passes through the seawater noise compensation circuit 334. This circuit blocks the noise signal in the seawater existing in the low frequency region, compensates the attenuation of the high frequency component signal, and transmits it to the signal transmission module 320.

The depth sensor 337 and the orientation sensor 338 installed in the acoustic module 330 respectively measure the orientation and depth information of the acoustic sensor unit 300 and transmit the measured orientation to the signal transmission module 320.

The signals transmitted to the signal transmission module 320 through the above process are sequentially multiplexed and then subjected to a sampling and quantization process to be digitized and transmitted to the ship 100 via the vibration isolation module 310.

The preamplifier 332 constituting the acoustic sensor unit 300 of the acoustic detector having the above functions amplifies the weak signal at the output stage of the hydrophone 331 and amplifies the weak signal at the output stage of the hydrophone 331, Amplifies the small signal of the hydrophone 331 after the emphasis process so as to facilitate signal processing.

When the signal is amplified in the preamplifier 332, fine noise introduced from the hydrophone 331 is also amplified by being loaded on the signal. Noise is also present due to the ambient noise as well as the noise factor of the amplification device itself. Thus, for the purpose of reducing this noise level, the amplification circuit bandwidth of the preamplifier 332 is limited to have a predetermined value, thereby reducing the various noise levels.

However, in the conventional acoustic detector, a signal applied to the mux 322 of the signal transmission module 320 through the preamplifier 332 and sensed by the hydrophone 331 is not only low in output level, Since the noise from the line between the signal transmission lines is directly input to the mux 322 and the noise level is raised in the mux 322, There is a problem that the processing for the original signal is not properly performed.

In order to solve the above-described problems, the present invention provides an acoustic sensor unit for multiplexing acoustic signals of a plurality of acoustic modules of an acoustic sensor unit constituting an acoustic detector using a submunks, and then transmitting the multiplexed acoustic signals to the main mux And an object of the present invention is to provide a device that can protect an original signal from the influence of noise introduced from a line when transmitting using the plurality of channels.

FIG. 1 is a block circuit diagram schematically illustrating a general acoustic detector. FIG.

FIG. 2 is a block diagram showing in detail the acoustic module and the vibration isolation module constituting the acoustic detector of FIG. 1;

FIG. 3 is a block circuit diagram schematically showing a configuration of a sound sensor unit and a submunks of the linear array passive-type acoustic detector according to the present invention. FIG.

FIG. 4 is a block circuit diagram schematically showing the overall configuration of an acoustic sensor unit having a submux part according to the present invention and a case of constructing an underwater acoustic sensor using the same.

DESCRIPTION OF THE REFERENCE NUMERALS

100: Marine ship 110: Data processing unit

120: signal processing unit 200: towing cable

300: acoustic sensor unit 310: vibration isolation module

320: signal transmission module 330: sound module

331: hydrophone oscillator 332: preamplifier

333: Compensation circuit 334: Seawater noise compensation circuit

335: Roll sensor 335: Test controller

337: Depth sensor 338: Orientation sensor

340: tail rope assembly 500: filter part

510: Submixer 520: Differential amplifier

530: gain control unit 540:

550: gain control input section 560: channel selection input section

570:

In order to achieve the above object, the present invention provides a vibration isolating module and a tail rope assembly for attenuating vibration generated around a sound sensor unit to prevent capture of a bad signal or the like; A sound module for converting sound generated from a sound source in the water into an electrical signal; And a signal transmission module including a main mux part for converting an analog signal from the sound module into a digital signal and multiplexing and transmitting the digital signal. A towing cable for connecting the acoustic sensor unit to the shipboard; And a data processing unit for classifying, searching, and processing the electrical signal data from the signal processing unit, wherein the signal processing unit for processing the acoustic signal from the acoustic sensor unit comprises: The sound sensor unit of the sonar underwater sonar system includes: a plurality of sound modules for sensing sound in water; A filter unit connected to a rear end of each of the acoustic modules to remove noise of the acoustic signals from the acoustic modules and adjust a pass band of the acoustic signals; A sub mux connected to the filter unit for multiplexing acoustic signals from the plurality of sound modules; A differential amplifier connected to a rear end of the sub mux to convert an output of the sub mux into a single-ended mode; A gain controller connected to a rear end of the differential amplifier for controlling an output gain of the acoustic signal; A power supply unit for receiving power from the ship and supplying the power to the acoustic sensor unit; And a current driver for converting the output of the multiplexed acoustic signal voltage output through the gain controller to a current output and outputting the current output to the main mixer.

The submixer of the present invention further includes a channel selection input unit including a waveform shaping circuit for shaping a waveform of a channel selection signal received from a shipboard, as a channel selection input unit for selecting a multiplexed channel As shown in FIG.

The gain control unit of the present invention may further comprise a gain control input unit having a waveform shaping circuit for shaping the waveform of the control signal received from the shipboard.

In addition, the power supply unit of the present invention may be configured to include a line filter for removing noise, ripple, and the like from a power supply line received from a ship.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

FIG. 3 is a block circuit diagram schematically showing a configuration of an acoustic sensor unit and a submunks of a passive-type acoustic detector according to the present invention.

FIG. 4 is a block circuit diagram schematically showing the overall configuration of an acoustic sensor unit having a submux part according to the present invention and a case of constructing an underwater acoustic sensor using the same.

Referring to FIG. 4, a hydrophone for sensing sound generated from a sound source in the water includes a vibrator 331 for converting a mechanical sound signal generated from a sound source into an analog electrical signal of 10 Hz to 1.6 kHz, And a preamplifier 332 which is respectively connected to the oscillator 331 and amplifies the acoustic signal applied from the oscillator 331.

Next, the apparatus of the present invention will be described in detail with reference to FIG.

An electrical signal passing through the preamplifier 332 of the hydrophone is applied to the filter unit 500 of the present invention. The filter unit 500 is connected to the rear end of each acoustic module to remove noise of the acoustic signal from the preamplifier 514 and to adjust the pass band of the acoustic signal.

In addition, the signal filtered through the filter unit 500 is applied to the sub mux 510, which is an analog mux. The submux part 510 multiplexes and outputs the applied signal. The submux part 510 multiplexes the signals from the acoustic modules of the twelve channels filtered through the filter part 500 into serial data.

At this time, a channel selection input unit 560 is connected to the submux unit 510 to select 12 channels to which the control signal from the ship 100 is received. The channel selection input unit 560 is preferably formed by incorporating a waveform shaping circuit for shaping the waveform of the channel selection signal received from the ship. The waveform shaping circuit is used to compensate for waveform distortion due to transmission of digital signals from a shipboard through a long-distance transmission line. The waveform shaping circuit at this time can also be configured using a conventional buffer circuit.

The signal output from the submux part 510 is input to the differential amplifier 520 and the gain control part 530 for converting the output of the submux part 510 into a single-ended method. The amplifier and gain control unit 530 performs a function of removing a low-frequency coincidence signal such as an induced crosstalk signal.

Meanwhile, the gain control unit 530 preferably has a gain of 24dB-30dB in order to increase the S / N ratio of the acoustic signal and the noise. The gain control unit 530 is preferably formed by incorporating a waveform shaping circuit for shaping the waveform of the gain control signal received from the ship. The waveform shaping circuit is used to compensate for waveform distortion due to transmission of digital signals from a shipboard through a long-distance transmission line. The waveform shaping circuit at this time can also be configured using a buffer circuit.

The gain-controlled multiplexed signal is applied to the current driver 540 before the output terminal. This circuit performs a function of converting the output voltage of the gain control unit 530 into a signal of a current type in order to transmit a long distance signal to the main mux.

The power source for operation of the individual devices constituting the present invention is supplied by the power source unit 570 which receives the high voltage from the shipboard and converts it into the necessary voltage. The power supply unit 570 includes a line filter for eliminating power supply noise and ripple-induced noise induced through the long-distance transmission line, thereby reducing power supply noise and gain offset error.

As described above, the acoustic sensor unit of the line array passive dolly having the sub mux part according to the present invention is characterized in that the mechanical acoustic signal generated from the underwater sound source sensed by the hydrophone of the acoustic module constituting the acoustic detector is 10 Hz to 1.6 kHz And then transmits the electrical signals to the main mux after multiplexing them by using the sub muxes of the plurality of acoustic modules of the acoustic sensor unit, thereby transmitting the signals using the plurality of channels It is possible to faithfully protect the original signal from the influence of the noise introduced from the circuit in the case of the signal.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the following claims Those skilled in the art will readily understand the present invention.

Claims (4)

A vibration isolating module and a tail rope assembly for attenuating vibrations generated around the acoustic sensor portion to prevent capturing of a signal call; A sound module for converting sound generated from a sound source in the water into an electrical signal; And a signal transmission module including a main mux part for converting an analog signal from the sound module into a digital signal and multiplexing and transmitting the digital signal. A towing cable for connecting the acoustic sensor unit to the shipboard; And a data processing unit for classifying, searching, and processing the electrical signal data from the signal processing unit, wherein the signal processing unit for processing the acoustic signal from the acoustic sensor unit comprises: The acoustic sensor unit of the sonar underwater sonar system includes a plurality of acoustic modules for sensing the sound in the water, a sound signal from the acoustic module is removed, A filter unit connected to a rear end of each of the sound modules to adjust a pass band of the sound signals; a sub mux unit connected to the filter unit for multiplexing the sound signals from the plurality of sound modules; A differential amplifier connected to a subsequent stage for converting an output of the submixing unit into a single-ended mode; A gain control unit connected to a rear end of the amplifier to control an output gain of the acoustic signal, a power supply unit for receiving power from the ship and supplying the power to the acoustic sensor unit, and a multiplexed acoustic signal voltage And a current drive unit for converting the output to a current output and outputting the current output to the main mux unit. The acoustic sensor unit of the underwater acoustic detector system of the line array example doll. The apparatus of claim 1, wherein the sub mux further comprises a channel selection input unit for selecting a multiplexed channel, the channel selection input unit including a waveform shaping circuit for shaping a waveform of a channel selection signal received from a shipboard The acoustic sensor part of the dolly type underwater acoustic detector system. 2. The system of claim 1, wherein the gain control unit further comprises a gain control input unit including a waveform shaping circuit for shaping a waveform of a control signal received from the shipboard. Sensor section. The line sensor according to claim 1, wherein the power supply unit includes a line filter for removing noise, ripple, and the like from a power supply line received from a ship.