JP2001221846A - System for avoiding warship detection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely avoid a warship from being detected, regardless of the distance with a warship on a searching side and to also surely avoid that the warship is detected by erasing the sound generated from the warship. SOLUTION: A detection reflected sound set-off means for detecting the detection signal from an underwater detector at a plurality of places of own warship OSP and emitting a reflected sound setting-off sonic waves inverse to the reflected sound of the ownship in phase into water from a plurality of places, on the basis of the detection signal to erase the reflected sound is provided. This means is equipped with a plurality of receiver-transmitter pairs 100, a plurality of detection reflected sound setting-off signal forming parts 200 each including a detecting sound signal detection part 210 and a reflected sound setting-off signal generation part 220. A generated sound setting-off means for detecting the generated sound of the own warship emitted into water and emitting a generated sound setting-off sonic wave inverse to the generated sound of the own warship in phase into water, on the basis of the detection signal to erase the generated sound of the own warship is provided. This means is equipped with a receiver-transmitter pair 500 and a generated sound setting-off signal forming part 600, including an own warship generated sound signal detection part 610 and a generated sound setting-off signal generation part 620.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship detection and avoidance system, and more particularly to a ship detection and avoidance system for avoiding detection when a search is performed by an underwater probe.

[0002]

2. Description of the Related Art When a submarine or the like is searched by an underwater probe mounted on another ship, it is highly necessary to prevent its location from being revealed or detected. Conventionally, as a system for avoiding the detection of the ship underwater with respect to the underwater probe, the outer shell of the hull is improved to reduce the intensity of the reflected sound of the ship by the probe sound wave, and the received sound at the underwater probe of the searching ship is known. There are means for lowering the intensity to the level of the surrounding noise, and deception means for generating bubbles or the like to deceive the position of the own ship.

[0003] In addition, the sound of the underwater probe of the searching ship may be detected and detected by sound waves emitted from the own ship and emitted into the water. And maneuvers (acceleration, changes in course and depth, etc.) must be suppressed to reduce the noise generated by the ship.

[0004]

In the above-described conventional ship detection and avoidance system, the means for improving the outer shell of the hull to reduce the intensity of the reflected sound of the ship itself by the probe sound wave, and the generation of air bubbles and the like to generate the ship's own ship Means to deceive the location of the ship are adopted, and means to limit the speed and maneuver of the ship to suppress the sound generated by the ship are taken.However, means to reduce the intensity of the reflected sound of the ship are If the amount of reduction is limited, the distance to the searching ship is short, and the intensity of the search sound wave is strong, the intensity of the reflected sound wave of the ship cannot be sufficiently reduced, and it is easier to use the underwater probe of the search ship. Has the disadvantage that fraud by bubbles and the like can be spotted immediately, and the means of restricting own ship speed and maneuver to suppress own ship sound is low. Positive correlation with own ship speed and maneuver One For greater constraints too for sailing Time, there is a limit to the effect due to limitations and the constraint of the constraint itself, there is a problem that it is easy to detect due to water Sagushin Yi of searching side ship.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to reliably prevent detection of sound waves even when the intensity of a sound wave from an underwater probe of a searching ship is high. Also, it is possible to eliminate the sound generated by the ship itself without restricting the ship's navigation and avoid being detected, and to deceive it as difficult to see and secure the safety of the ship's navigation. It is an object of the present invention to provide a ship detection and avoidance system that can be used.

[0006]

The first ship detection and avoidance system according to the present invention is provided when an underwater probe is used to search.
This is a ship detection avoidance system for avoiding detection of the own ship, and in order to achieve the above-described object, a detection sound from the underwater probe is detected at a plurality of locations on the own ship, and a detection signal is generated. Based on the detection sound, the reflection sound canceling sound wave having a phase opposite to that of the reflection sound of the own ship is emitted from a plurality of locations of the own ship, and the reflection sound of the own ship is canceled, and It is characterized by comprising.

[0007] The search and reflection sound canceling means includes the following components. (A) A receiver for receiving a probe sound from the underwater probe and converting it into an electric signal, and converting a supplied electric signal into the probe reflection sound canceling sound wave and radiating it into water A plurality of receiver / transmitter pairs disposed at a predetermined position of the own ship, and (b) provided in correspondence with the plurality of receiver / transmitter pairs,
A plurality of detection sound signal detectors each detecting a detection sound signal based on an electric signal from the receiver of the corresponding receiver / transmitter pair (c) the plurality of receivers / transmitters It is provided corresponding to the pair,
A plurality of detection and reflection sound canceling signal generation units, each of which generates a detection and reflection sound cancellation signal based on the detection sound signal from the corresponding detection sound signal detection unit and supplies the signal to the corresponding transmitter;

[0008] Further, each of the plurality of receiver / transmitter pairs has a characteristic that a reception directivity characteristic is proportional to a cosine of an angle from a center axis of the receiver. The transmission directivity characteristic is configured to have non-directionality.

According to a second aspect of the present invention, there is provided a ship-detection avoiding system for preventing a ship from being detected when a search is performed by an underwater probe. In order to detect the own ship generated sound generated in the own ship and radiated into the water, and based on the detection signal, radiate generated sound canceling sound waves having a phase opposite to the own ship generated sound into the water, It is characterized by comprising a generated sound canceling means for canceling the own ship generated sound.

The generated sound canceling means includes the following components. (B) each comprises a receiver for receiving the own ship generated sound and converting it into an electric signal, and a transmitter for converting the supplied electric signal to the generated sound canceling sound wave and radiating the same, A plurality of receiver / transmitter pairs arranged at predetermined positions of the ship; (b) provided in correspondence with the receiver / transmitter pairs;
A plurality of own ship generated sound signal detectors each detecting an own ship generated sound signal based on an electric signal from a receiver of a corresponding receiver / transmitter pair; Provided in correspondence with the instrument pair,
A plurality of generated sound canceling signal generators, each generating a generated sound canceling signal based on the own ship generated sound signal from the corresponding own ship generated sound signal detector and supplying the generated sound canceling signal to the corresponding transmitter.

[0011] In addition to the first ship detection and avoidance system,
A deceptive reflected sound signal is generated based on the detected sound detection signal detected by the detected reflected sound canceling means, and the deceptive reflected sound signal is supplied to a transmitter towed by one's own ship and deceived from this transmitter. It is provided with position deceptive means for radiating as reflected sound into the water and searching for an underwater probe to search for as if the reflected sound came from a position different from the current position of the ship.

Further, in addition to the first ship detection detection avoidance system, each of the detection sound detection signals detected by the detection reflection sound canceling means is stored in a memory, and these stored signals are read out from the memory. By controlling the timing and processing the signal read from the memory, the ship's own ship radiates into the water as deceptive sound waves different from the reflected sound based on the current navigation specifications, for the underwater probe to search, The ship is provided with navigation specification deception means to deceive as if the ship is navigating with navigation specifications different from the current navigation specifications.

Further, the navigation specification deception means delay-controls the read timing of each of the stored signals from the memory based on the distance to be deceived, and attenuates the level of each of the signals read from the memory. The navigation specification deception means is configured to control and deceive the distance, and the navigation specification deception means is based on the relative orientation of the underwater probe to be searched for with the own ship and the posture of the own ship to be deceived. Then, the read timing of each of the stored signals from the memory is controlled, and the level of each of the signals read from the memory is controlled to deceive the posture.

[0014] Further, the navigation specification decepting means may be configured to falsify the ranging by changing the frequency of each signal read from the memory based on the distance of the own ship to be deceived. The navigation specification deception means may further include, based on the relative orientation of the underwater probe to be searched for relative to the own ship, the posture of the own ship to be deceived, and the distance of the own ship to be deceived. , Controlling the timing of reading the stored signals from the memory, controlling the level of the signals read from the memory, and changing the frequency to deceive the posture and range. are doing.

Further, in addition to the above-mentioned second ship detection and avoidance system, a sound deception means for emitting a deception sound different from the own ship's sound into the water is provided.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of the present invention, a search sound from an underwater probe of a search-side ship is detected at a plurality of locations on its own ship, and based on the detection signals, The reflected sound of the ship is reflected from the own ship by the reflected sound canceling sound wave radiated into the water from a plurality of locations of the ship, canceling the reflected sound of the ship, has a configuration equipped with a search reflected sound canceling means I have.

With such a configuration, it is possible to radiate a sound for canceling the reflected sound of the detection sound at a level corresponding to the intensity of the search sound arriving at the own ship, thereby canceling the reflected sound of the own ship due to the search sound. Therefore, even if the distance to the searching ship is short and the search sound is strong (regardless of the distance to the searching ship), the reflected sound of the own ship can be reliably canceled and the underwater search can be performed. It can be reliably prevented from being detected by beliefs.

In the second embodiment of the present invention, the sound generated by the own ship and emitted into the water is detected, and based on the detection signal, the generated sound has a phase opposite to the sound generated by the own ship. It has a configuration provided with a generated sound canceling means for emitting sound canceling sound waves into water to cancel the sound generated by the ship itself.

With this configuration, the sound generated by the ship itself can be reliably canceled without restricting the navigation of the ship, and the sound generated by the ship does not reach the search side ship. The sounding function of can surely prevent the own ship from being detected.

The third embodiment of the present invention is the same as the first embodiment.
In addition to the embodiment, a false reflection sound signal is generated based on the detection sound detection signal detected by the detection reflection sound canceling means, and the false reflection sound signal is supplied to the transmitter towed by the ship. It has a configuration with position deception means, which radiates underwater as reflected sound and searches for underwater probes to search as if the reflected sound came from a position different from the current position of the ship. I have.

With this configuration, the reflected sound of the own ship can be eliminated to prevent the own ship from being detected, and the deceptive reflected sound is radiated from the towing transmitter. As a result, the search can be directed to a position different from the current position of the own ship, and the navigation safety of the own ship can be ensured.

The fourth embodiment of the present invention is the same as the first embodiment.
In addition to the above embodiments, each of the detection sound detection signals detected by the detection reflection sound canceling means is stored in the memory, the timing at which these stored signals are read out from the memory is controlled, and the readout signal is read out from the memory. After processing the output signal, the ship radiates into the water as a deceptive sound wave different from the reflection sound based on the current navigation specifications, and the ship is different from the current navigation specifications for the underwater probe to search. It has a configuration provided with navigation specification deception means for deceiving as if sailing under navigation specifications. Note that the deceptive navigation specifications include the distance to the own ship, the position of the own ship (aspect), the range of the own ship, and the combination of the position and the range of the own ship with respect to the underwater probe to be searched.

With this configuration, it is ensured that the own ship is not detected, and that the navigation parameters of the own ship with respect to the searching ship are recognized as navigation parameters different from the current navigation parameters. As a result, it is possible to mislead the own ship's navigation status, route prediction, and the like as being different from the actual one, and it is difficult to detect this deception, so that the safety of the own ship's navigation can be ensured.

The fifth embodiment of the present invention is the same as the second embodiment.
In addition to the embodiments described above, the present invention has a configuration provided with a generated sound deception means for emitting a deceit generated sound different from the own ship generated sound into water. By adopting such a configuration, the sound generated by the ship itself is eliminated to avoid detection of the ship itself, and due to the sound of deception, the ship is different from the ship, etc. It can be mistaken and the sound generated by the ship itself can be kept secret.

[0025]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 (a) and 1 (b) show a relative positional relationship between a ship and a searching ship and a state of arrangement of a plurality of receiver / transmitter pairs for explaining a first embodiment of the present invention. It is a figure and its block diagram. This first embodiment is:
Underwater probe mounted on the search ship SSP (not shown)
This is to prevent the own ship OSP from being detected when a search is made. The sound from the underwater probe is detected at multiple locations on the ship, and the search is performed based on the detection signals. A detection sound canceling means for radiating reflected sound canceling sound waves having a phase opposite to that of the reflected sound of the own ship OSP from a plurality of places of the own ship OSP to cancel the reflected sound of the own ship OSP,
Detects the sound generated by the ship itself and radiated into the water, and based on the detection signal, radiates into the water a sound for canceling the generated sound, which has the opposite phase to the sound generated by the ship, and cancels the sound generated by the ship. , And the generated sound canceling means. The details of the detection and reflection sound canceling means and the generated sound canceling means are as follows.

First, the detection and reflection sound canceling means includes a receiver 110 for receiving the detection sound from the underwater probe and converting it into an electric signal, and a detection and reflection sound for the supplied electric signal. A transmitter 120 for converting into a canceling sound wave and radiating into the water; a plurality of receiver / transmitter pairs 100 arranged at predetermined positions of the own ship OSP; and a plurality of receiver / transmitters And a plurality of detection sound signal detection units each of which detects a detection sound signal based on an electric signal from the receiver 110 of the corresponding reception / transmission device pair 100. Unit 210 and a plurality of receiver / transmitter pairs 100, each of which is provided based on a search sound signal from a corresponding search sound signal detection unit 210 and based on the sound wave reflection characteristics of the own ship. To generate a probe reflected sound canceling signal, and
When the level of the detection sound signal detected by the corresponding detection sound signal detection unit 210 and the reflected sound cancellation signal generation unit 220 to be supplied to the signal 20 is low and it is determined that the sound wave is not to be canceled,
And a plurality of threshold level setting units 230 for stopping generation of the corresponding search and reflection sound canceling signal.

It should be noted that the corresponding search sound signal detection section 210,
Reflected sound canceling signal generating section 220 and threshold level setting section 2
30 forms a search and reflection sound canceling signal generation unit 200.

Each of the generated sound canceling means includes a receiver 5 for receiving the sound generated by the own ship in the water and converting the sound into an electric signal.
10 and a transmitter 520 that converts the supplied electric signal into a generated sound canceling sound wave and radiates it into water, and a plurality of receiver / transmitter pairs arranged at predetermined positions of the own ship OSP. 500, and a plurality of receiver / transmitter pairs 500, each of which is provided with a corresponding receiver / transmitter pair 50.
A plurality of own ship generated sound signal detection units 610 that detect own ship generated sound signals based on the electric signal from the zero receiver 510.
And a plurality of receiver / transmitter pairs 500 are provided,
Each generates a generated sound canceling signal based on the own ship generated sound signal from the corresponding own ship generated sound signal detection unit 610,
A plurality of generated sound canceling signal generation units 620 to be supplied to the corresponding transmitter 520 and the corresponding own ship generated sound signal detection unit 61
And a plurality of threshold level setting units 630 that stop the generation of the corresponding generated sound canceling signal when the level of the own ship generated sound signal detected at 0 is low and is determined to be out of the cancellation target.

The corresponding own ship generated sound signal detecting section 61
0, the generated sound canceling signal generation unit 620 and the threshold level setting unit 630 form the generated sound canceling signal generation unit 600.

The plurality of receiver / transmitter pairs 100 of the detection and reflection sound canceling means are arranged so that the coverage range covers the entire hull, and the sound wave reflection characteristics of the own ship vary depending on the hull shape and the like. Flat parts such as the side of the ship, and projecting parts such as bridges and rudders are also arranged so that they can receive the search sound.

Further, the receiver 11 of the receiver / transmitter pair 100
The directivity characteristic of 0 is a rotating body whose central axis is in the front direction. As a characteristic proportional to the cosine of the angle from this central axis, the element of the strength of the own ship reflected sound with respect to the direction of arrival of the search sound is included, and It is desirable that the directivity characteristics of the device 120 be omnidirectional so that the own ship's reflected sound can be easily canceled irrespective of the search sound arrival direction.

The plurality of receiver / transmitter pairs 500 of the generated sound canceling means are provided at the tip of the submersible and rudder near the screw, and near the sound source of the ship's own engine at the rear lower part of the hull. Place around the sound source of the generated sound. In addition, the receiver / transmitter pair 500 takes into account the radiation characteristics of the sound generated by the ship itself,
It is desirable that the directional characteristics of both the receiver 510 and the transmitter 520 be non-directional.

With such a configuration, a reflected sound canceling sound wave having a phase opposite to that of the search sound is radiated in accordance with the search sound of each part of the ship coming from the underwater search rod. Since the own ship reflection sound can be canceled, even if the distance to the searching ship SSP is short and the intensity of the search sound is strong, the own ship reflection to the underwater probe is possible regardless of the distance to the searching ship SSP. The sound can be reliably erased,
Detection by this underwater probe can be reliably avoided. Further, since the reflected sound canceling sound wave of a limited level is radiated for each part, there is an effect of suppressing detection by the third sound.

Further, since the sound generated by the own ship is detected and canceled by the wave receiving / transmitting device pair 500 provided near the sound source, the sound is generated regardless of the speed, maneuver, navigation, etc. of the own ship. I can surely eliminate the sound of my ship,
Detection by the sound function of the underwater probe can be reliably avoided.

FIG. 2 is a structural block diagram for explaining a second embodiment of the present invention, and FIG. 3 is a diagram showing a relative positional relationship between the searching ship and its own ship and towing body. In the second embodiment, a deceptive signal generation section 310 is provided based on the detection sound detection signal detected by the detection reflection sound canceling means in addition to the detection reflection sound canceling means in the first embodiment. To generate a deceptive reflected sound signal, and supplies the deceptive reflected sound signal to the transmitter 130 towed by the ship OSP.
30 radiates into the water as deceptive reflected sound, and the searching ship S
The underwater probe of the SP is provided with position deceptive means for deceiving the reflected sound as if it came from a position different from the current position of the ship OSP (the position of the towing body TS).

The deceptive signal generator 310 includes a predetermined number of the reflected sound canceling signal generators 2 among the plurality of search and reflection sound canceling signal generators 200-1 to 200-n.
The decimation reflection signal is synthesized by synthesizing the search reflection sound canceling signal from the signal 20 and supplies the signal to the transmitter 130. Also, the towed transmitter 130 is provided with an underwater probe mounted on its own ship.
If it includes, the transmitter installed on the towed body TS can be used.

With this configuration, the ship O
The reflected sound of the SP is eliminated to avoid detection of the ship itself, and the deceptive reflected sound from the towing transmitter 130 directs the search eye to a position different from the current position of the ship OSP. And the ship cannot be easily detected, so that the safety of the ship's navigation can be ensured.

The position to be deceived includes the heading and distance, but in the case of a relative heading in which the searching ship SSP is almost right beside the own ship OSP, the deception only takes place unless a temporal operation is applied. When the searching ship SSP is in the bow direction or the stern direction, only the deception of the distance is performed.

FIG. 4 is a block diagram showing the configuration of a third embodiment of the present invention, and FIG. 5 is a diagram showing the relationship between the searching ship and its own ship and their deceptive positions in this embodiment.
In the third embodiment, in addition to the detection and reflection sound canceling means in the first embodiment, the detection and detection sound signals detected by the plurality of detection sound signal detection units 210 of the detection and reflection sound cancellation means are different. The sound detection signal is stored in the corresponding memory unit 320, and the timing at which these stored signals are read out from the memory unit 320 is determined by the timing between the searching ship SSP and the own ship OSP.
Based on the distance Rd to be deceived and the actual distance Rr, delay control is performed by the timing control unit 410, and the level of each signal read from the memory unit 320 is level-controlled based on the distances Rd and Rr. Part 42
Under the control of 0, the distance deception signal generation unit 330 performs attenuation control and outputs a distance deception signal, and the corresponding addition unit (2
50-1 to 250-n) to the transmitters 120 of the corresponding receiver / transmitter pair (100-1 to 100-n), and from these transmitters 120 as underwater sound for distance deception. To the underwater probe to search, the searching ship SS
The distance deception means for deceiving whether the distance between P and the own ship OSP is a distance Rd different from the actual distance Rr is provided.

In the third embodiment, the memory unit 3
20 and the distance deception signal generation unit 330 form deception signal generation units 300-1 to 300-n, and the timing control unit 4
10 and the level control unit 420 form a deception control unit 400. Since the distance deception means merely deceives the distance, the timing control for reading out the stored signal from each memory unit 320 may be performed by giving the same delay time. In the attenuation control, the same amount of attenuation may be applied.

With such a structure, the ship O
After eliminating the reflected sound of the SP to avoid detection of the ship itself, check whether the distance between the ship OSP and the searching ship SSP is different from the current (actual) distance. It is not possible to easily recognize this, and the navigation safety of the ship OSP can be ensured.

FIG. 6 is a block diagram for explaining a fourth embodiment of the present invention, and FIGS. 7 and 8 are diagrams showing the relationship between the searching ship and its own ship and its deceptive posture in this embodiment. . In the fourth embodiment, the block configuration is different from that of the third embodiment in that the distance deception signal generation unit 330 is used as the posture deception signal generation unit 340 and the timing control unit is used as a 41
0 to 410a, level control unit from 420 to 420a
To deceive the posture of the own ship OSP, the timing control unit 410a determines that the relative orientation SPD of the search ship SSP in the own ship OSP (the position of the own ship OSP is known from the relative orientation SPD), The posture APd (the relative direction also changes) to try to deceive,
Based on the arrangement state of the plurality of receiver / transmitter pairs 100-1 to 100-n and the like, the signal readout timing of each memory unit 320 is controlled, and the level control unit 420a and the posture deception signal generation unit 340 , Similarly, relative azimuth SPD,
APd to be deceived, and receiver / transmitter pair 10
Based on the arrangement state of 0-1 to 100-n, the level of the signal read from each memory unit 320 is controlled to generate a posture deceptive signal, and the corresponding addition unit (250-
1 to 250-n) to the corresponding transmitters 120, and from these transmitters 120, the posture deceptive sound waves are radiated into the water.

In the fourth embodiment, if the posture to be deceived is a posture to sail toward the searching ship SSP, the deception of the bow, bridge, rudder, etc. (solid line in FIG. 7) The level of the sound wave is emphasized, and the timing of emission of these deceptive sound waves (the read timing of the memory unit 320) is controlled by the position. In addition, when the posture to be deceived is arbitrary (for example, as shown in FIG. 8)
The level and emission timing of the deceptive sound wave are determined based on the actual posture (related to the relative azimuth SPD), the posture APd to be deceived, the arrangement state of the receiver / transmitter pair 100, and the like. A deceptive sound wave of the posture APd to be deceived is emitted.

With such a structure, the ship O
After erasing the reflected sound of the SP and avoiding detection of the ship itself, the position of the ship OSP is changed to the current (actual) position.
Since it is recognized as if it is in a position different from the position, and this cannot be easily detected, the navigation prediction of the own ship OSP in the searching ship SSP can be erroneously performed. Can be made more difficult to detect, and the navigation safety of the own ship OSP can be ensured. In this embodiment, since the level of the deceptive sound wave and the emission timing are easy to control,
Deception of distance is also easy.

The search ship SS in the own ship OSP
The relative azimuth SPD of P can reduce the configuration of the present system by using information from a sonar device mounted on the ship OSP, an underwater probe, and the like.

FIG. 9 is a block diagram for explaining a fifth embodiment of the present invention, and FIG. 10 is a diagram showing the relationship between the searching ship and its own ship and their deceptive posture and deceptive distance in this embodiment. is there. The fifth embodiment is obtained by adding a distance deception means to the fourth embodiment, and the timing control unit 410b and the level control unit 420b receive information on the distance Rd to be deceived. It also provides the function of distance deception.

The range deception means of this embodiment includes a reception frequency detection section 430 for detecting a reception frequency of a search sound based on a search sound detection signal from the search sound signal detection section 210;
The relative bearing SPD of the searching ship SSP in P, the posture APd to be deceived, and the distance V to be deceived
Based on Dd (the deception speed vd in the traveling direction), the frequency of the posture deceptive signal from each of the plurality of posture deception signal generation units 340a is changed to generate a distance deception signal, and the corresponding addition unit (250-1 to 250-1) is generated. 250-n), and a frequency control unit 440 and a range deception signal generation unit 350 that supply the corresponding transmitters 120 with each other.

The deception signal generation section 350 forms a deception signal generation section 300b together with the memory section 320 and the posture deception signal generation section 340a, and the reception frequency detection section 43
0 and the frequency control unit 440
deception control unit 400b together with b and level control unit 420b
To form

In the fifth embodiment, since the deception of distance is performed in addition to the deception of the posture, the navigation prediction of the own ship OSP in the searching ship SSP is further mistaken, and the own ship OSP is detected. Can be extremely difficult. In the fifth embodiment, since the distance change depends on the position, the deception of the position and the deception of the distance change based on this position are combined, but the deception is performed only by the distance change. In this case as well, the navigation prediction of the own ship OSP in the search-side ship SSP can be made erroneous, and the detection of the own ship OSP can be avoided.

In the fifth embodiment, the information of the deceptive distance Rd is supplied to the timing control unit 410b and the level control unit 420b, and the deceivable distance Rd is supplied to them.
A function of delay control and level attenuation control for a deceptive signal based on d may be provided to perform deception of a distance.

In the third to fifth embodiments, the deceptive sound wave is radiated into the water from the transmitter 120 of the receiver / transmitter pair 100. Vessel 1
It is also possible to stop radiating from the 20 and radiate from the transmitter 130 towed by the own ship OSP. That is, the second
In the third embodiment, the signal supplied to the deceptive signal generation unit 310 is replaced with the output signal of the reflected sound canceling signal generation unit 220, and the deception signal generation unit 30 in the third to fifth embodiments is used.
When emitting deceptive sound waves from the towed transmitter 130 as output signals of 0, 300a, and 300b, emission of the deceptive sound waves from the transmitter 120 of the receiver / transmitter pair 100 may be stopped. With such a configuration, the second
In addition to the deception of the position of the embodiment of the present invention, the deception of the distance, the posture, and the distance change is also possible.

FIG. 11 is a structural block diagram for explaining a sixth embodiment of the present invention. In the sixth embodiment, in addition to the generated sound canceling means in the first embodiment, the deceived sound signal generator 700 generates a deceived sound different from the own ship sound, for example, from another ship or a non-existent submarine. And supplies the signal to the transmitter 520 of the receiver / transmitter pair 500 via the adder 650.
This device radiates into the water as deceptive sound, and deceives whether it is a ship other than its own ship or the like.

By adopting such a configuration, it is possible to prevent the own ship itself from being detected and misidentify it as another ship other than the own ship, and to conceal the sound generated by the own ship. There are effects such as being able to do.

[0054]

As described above, according to the present invention, the detection sound from the underwater probe to be searched is detected at a plurality of locations of the ship, and based on the detection signals, the reflection sound of the ship due to the search sound is determined. The system is equipped with a sound-reflecting sound canceling means that radiates anti-phase reflected sound canceling sound waves into the water from multiple points on the ship and cancels the reflected sound of the ship, so that the distance to the searching ship and the sound Regardless of the strength of the ship, the reflected sound of the ship can be canceled, and the effect that the ship can be reliably prevented from being detected by the underwater probe is generated, and the ship generated by the ship and radiated into the water By detecting the sound and based on the detection signal, by emitting a generated sound canceling sound wave in phase opposite to the generated sound of the own ship into the water, and by including a generated sound canceling means for canceling the generated sound of the own ship, Underwater probe with no restriction on your ship's navigation The listening sound function has the effect of reliably avoiding detection of the ship itself.In addition to the detection reflection sound canceling means, a deceptive reflection sound signal is generated based on the detection sound detection signal, and this deception reflection sound is generated. By providing a signal to the transmitter towed by the ship and radiating it into the water as deceptive reflected sound, and using a configuration with position deception means to deceive the position of the ship to a position different from the actual position, Make sure to avoid being detected, focus your search on a position different from your ship's current position, and ensure that your ship is safe to navigate as this deception is difficult to spot In addition to the detection and reflection sound canceling means, a plurality of detection sound detection signals are stored in a memory, the timing of reading the stored signal from the memory is controlled, and the read signal is read. Process it, It radiates into the water as a deceptive sound wave different from the reflection sound based on the current navigation specifications, and deceives the underwater probe to search as if the ship was navigating with navigation specifications different from the current navigation specifications. The system is equipped with a navigational data deception means that can prevent the owning ship from being detected and make the searching ship misidentify the navigational characteristics of the owning ship. It has the effect of ensuring safety, and in addition to the generated sound canceling means, equipped with generated sound deceptive means that emits deceptive sound different from the own ship generated sound into the water and deceives whether it is a ship etc. different from your ship With this configuration, it is possible to prevent the own ship itself from being detected, and make it possible to misidentify the ship as a ship other than the own ship, thereby concealing the sound generated from the own ship.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a relative positional relationship between a ship and a search-side ship and a state of arrangement of a plurality of wave-receiving / transmitter pairs and a configuration block diagram thereof for explaining a first embodiment of the present invention; It is.

FIG. 2 is a configuration block diagram for explaining a second embodiment of the present invention.

FIG. 3 is a diagram illustrating a relative positional relationship between a search-side ship, its own ship, and its towing body for explaining a second embodiment of the present invention.

FIG. 4 is a configuration block diagram for explaining a third embodiment of the present invention.

FIG. 5 is a diagram for explaining a third embodiment of the present invention, showing a relationship between a search-side ship, its own ship, and its deceptive position.

FIG. 6 is a configuration block diagram for explaining a fourth embodiment of the present invention.

FIG. 7 is a diagram illustrating a relationship between a search-side ship, its own ship, and one deceptive posture thereof for explaining a fourth embodiment of the present invention.

FIG. 8 is a diagram illustrating a relationship between a search-side ship, its own ship, and another deceptive posture for explaining a fourth embodiment of the present invention.

FIG. 9 is a configuration block diagram for explaining a fifth embodiment of the present invention.

FIG. 10 is a diagram illustrating a relationship between a search-side ship, its own ship, its deceptive posture, and deceptive distance for explaining a fifth embodiment of the present invention.

FIG. 11 is a configuration block diagram for explaining a sixth embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 100, 100-1 to 100-n receiver / transmitter pair 110 receiver 120, 130 transmitter 200, 200-1 to 200-n search and emission sound canceling signal generation unit 210 search sound signal detection Unit 220 reflected sound canceling signal generation unit 230 threshold level setting unit 250-1 to 250-n addition unit 300-1 to 300-n deception signal generation unit 300a-1 to 300a-n deception signal generation unit 300b-1 300b-n Deception signal generation unit 310 Deception signal generation unit 320 Memory unit 330 Distance deception signal generation unit 340 Posture deception signal generation unit 350 Distance deception signal generation unit 400, 400a, 400b Deception control units 410, 410a, 410b Timing control Sections 420, 420a, 420b level control section 430 reception frequency detection section 440 frequency control section 500 receiver / transmitter pair 5 0 Receiver 520 Transmitter 600 Generated sound canceling signal generation unit 610 Own ship generated sound signal detection unit 620 Generated sound cancellation signal generation unit 630 Threshold level setting unit 650 Addition unit 700 Deceptive generated sound signal generation unit OSP Own ship SSP search side Ship TS Towing

Claims (12)

[Claims] 1. When a search by an underwater probe is performed,
A ship-detected avoidance system for avoiding detection of the own ship, wherein a detection sound from the underwater probe is detected at a plurality of locations on the own ship, and based on the detection signals, the detection sound is used. A ship cover characterized by comprising detection sound canceling means for radiating reflected sound canceling sound waves having a phase opposite to that of the reflected sound of the own ship from a plurality of locations of the own ship and canceling the reflected sound of the own ship. Detection avoidance system. 2. The ship detection avoidance system according to claim 1, wherein the detection reflection sound canceling means includes the following components. (A) A receiver for receiving a probe sound from the underwater probe and converting it into an electric signal, and converting a supplied electric signal into the probe reflection sound canceling sound wave and radiating it into water A plurality of receiver / transmitter pairs disposed at a predetermined position of the own ship, and (b) provided in correspondence with the plurality of receiver / transmitter pairs,
A plurality of detection sound signal detectors each detecting a detection sound signal based on an electric signal from the receiver of the corresponding receiver / transmitter pair (c) the plurality of receivers / transmitters It is provided corresponding to the pair,
A plurality of detection and reflection sound canceling signal generation units, each of which generates a detection and reflection sound cancellation signal based on the detection sound signal from the corresponding detection sound signal detection unit and supplies the signal to the corresponding transmitter; 3. The plurality of receiver / transmitter pairs,
3. The receiver according to claim 2, wherein the wave receiving directivity has a characteristic proportional to the cosine of the angle from the center axis, and the wave transmitter has a non-directional wave transmitting directivity. Ship detection detection avoidance system. 4. When a search by an underwater probe is performed,
A ship-detected avoidance system for avoiding detection of the own ship, detecting a sound generated by the own ship and radiated into water under the control of the own ship, and based on the detection signal, detects the sound generated by the own ship. A ship detected detection avoidance system comprising: a generated sound canceling means for radiating generated sound canceling sound waves having opposite phases into water to cancel the own ship generated sound. 5. The system according to claim 4, wherein the generated sound canceling means includes the following components. (B) each comprises a receiver for receiving the own ship generated sound and converting it into an electric signal, and a transmitter for converting the supplied electric signal to the generated sound canceling sound wave and radiating the same, A plurality of receiver / transmitter pairs arranged at predetermined positions of the ship; (b) provided in correspondence with the receiver / transmitter pairs;
A plurality of own ship generated sound signal detectors each detecting an own ship generated sound signal based on an electric signal from a receiver of a corresponding receiver / transmitter pair; Provided in correspondence with the instrument pair,
A plurality of generated sound canceling signal generators, each generating a generated sound canceling signal based on the own ship generated sound signal from the corresponding own ship generated sound signal detector and supplying the generated sound canceling signal to the corresponding transmitter. 6. A deceptive reflection sound signal is generated based on a detection sound detection signal detected by a detection reflection sound canceling means in addition to the ship detection detection avoidance system according to claim 1, and the deception reflection sound signal is generated. The ship sends it to a towed transmitter and radiates it into the water as deceptive reflected sound, and the underwater probe to search for the reflected sound from a position different from the ship's current position. A ship detection and avoidance system comprising position deception means to deceive. 7. In addition to the ship detected detection avoidance system according to claim 1, each detection sound detection signal detected by the detection reflection sound canceling means is stored in a memory, and these stored signals are read out from the memory. Underwater probes that control the timing of the signals and process the signals read from the memory to radiate into the water as deceptive sound waves different from the reflected sound of the ship itself based on the current cruise specifications and search. A ship detection and evasion system comprising navigational specification deception means for deceiving that the own ship is navigating with navigational specifications different from the current navigational specifications. 8. The navigation specification deception means delay-controls the timing of reading each of the stored signals from the memory based on the distance to be deceived, and attenuates the level of each of the signals read from the memory. 8. The ship detection avoidance system according to claim 7, wherein the system is controlled to deceive the distance. 9. The timing at which each of the stored signals is read out from a memory based on a relative orientation of the underwater probe to the own ship and a posture of the own ship to be deceived, wherein the navigational specification deception means performs the search. The system for detecting and avoiding detection of a ship according to claim 7, wherein the system controls the level of each of the signals read from the memory to deceive the posture. 10. The navigation specification deception means changes the frequency of each signal read from the memory based on the distance of the own ship to be deceived, and deceives the distance deviation. 7. The ship detection avoidance system according to 7. 11. The method according to claim 11, wherein said navigational specification deception means is based on a relative orientation of the underwater probe to the own ship, a posture of the own ship to be deceived, and a distance of the own ship to be deceived. 8. The method according to claim 7, wherein the timing of reading each of the stored signals from the memory is controlled, the level of each of the signals read from the memory is controlled, and the frequency is changed to deceive the posture and the distance. Ship detection detection avoidance system. 12. A ship detection detection avoidance system comprising a sound detection means for emitting a deception sound different from the ship's own sound into the water, in addition to the ship detection detection avoidance system according to claim 4.