JPH04120489A - Underwater sound data collecting apparatus - Google Patents

Abstract

PURPOSE:To prolong a time for collection of data and to improve secrecy by a method wherein a sonobuoy is separated and made to surface at a setting time and a power is supplied for transmission. CONSTITUTION:When a sonobuoy 2a is dropped onto the surface of the sea, a vertical receiver array 10 connected with a mooring unit 2b lowers and obtains sound data from underwater. Then sound-print data on a submarine 5 are classified and compressed. When a time set beforehand by a timer circuit comes, subsequently, a pulse signal for making the sonobuoy 2a surface is outputted to a separating mechanism and a power supply element. Then, the separating mechanism separates the sonobuoy 2a from the array 10 and makes it surface. The power supply element supplies a power to a receiver and a transmitter, and when reception data of the receiver show a command for transmission of the collected sound-print data on the submarine 5, an output is made through the transmitter. Besides, the position of the sonobuoy 2a is determined by using a radio wave from a global position system GPS satellite inputted from an antenna, and it is outputted to the transmitter. Accordingly, the sound-print data and position data are outputted together outside through the transmitter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to underwater sound data collection devices, and more particularly to power conservation, concealment, and location of sonobuoys.

[Prior Art] FIG. 5 is a diagram illustrating a conventional underwater acoustic data collection method.

In the figure, (1) is an acoustic buoy (hereinafter referred to as sonobuoy)
It is an airplane equipped with multiple sonobuoys, and a frequency is assigned to each sonobuoy. (2) is a sonobuoy that was dropped into the sea by the airplane (1) (hereinafter referred to as a sonobuoy after landing), and its operating time is less than half a day. (8)
is the antenna extended by the sonobuoy (2) after landing, (4) is the delivery device dropped into the water from the bottom of the sonobuoy (2) after landing, (4a) is the weight, and (5) is the submersible. ship,
(6) is a group of fish, and (7) is a water vessel.

For example, when an airplane (1) equipped with multiple sonobuoys arrives at a sea area where underwater sounds are to be collected, drops the sonobuoys into the sea, and lands on the water, the sonobuoys (2) after landing extend their antennas (3). , lower the receiver (4) into the water from the bottom.

After landing on the water, the sonobuoy (2) is immediately powered on and becomes operational.

Next, the receiver (4) collects the sounds that propagate through the water (hereinafter referred to as the "underwater") and reaches them, such as the radiated sound of an underwater boat (5) or the calls of a school of fish (8), and collects them as electrical signals (hereinafter referred to as "audible sounds"). (referred to as data) and output.

Then, when the sound data is transmitted to the sonobuoy (2) floating on the sea surface after landing, the sonobuoy (2) after landing modulates the sound data to the assigned radio frequency. It is radiated from the antenna (3) towards the airplane (1).

Next, the airplane (1) transfers the received sound data to the watercraft (7).
on a predetermined frequency.

In this way, the surface vessel (7) collected sounds from a plurality of sonobuoys (2) after landing on the water, and determined the position of the submersible (5).

[Problems to be solved by the invention] In the conventional underwater sound data collection method as described above, (1)
Since it constantly drives a transmitter that consumes a large amount of power, the operating time is short, less than half a day.

(2) Since data is relayed by airplane, confidentiality is ensured.

(3) Since multiple sonobuoys are operated simultaneously, radio frequencies must be allocated to each buoy.

(4) Since the sonobuoy is in a floating state after landing on water, its position may shift during operation due to the influence of wind and waves, making it difficult to determine the position of the submersible. .

The present invention was made to solve these problems, and has excellent confidentiality, does not require assigning a frequency to each sonobuoy, can collect data for a long time, and can be used to track the location of a submersible using the collected data. The purpose is to obtain a sonobuoy that is easily required.

[Means for Solving the Problems] The underwater sound data collection device according to the present invention lowers a vertical receiver array connected to a mooring device when a sonobuoy is dropped onto the sea surface, and collects sound data from the sea vertically. When a command is input from the receiver to classify and compress the sound print data of the submersible obtained by the receiver array and to transmit the classification results to the outside, the classified sound print data of the submersible is transmitted. In an underwater sound data collection device having a data output means for outputting data to the outside via a device, when a preset time is reached,
A timer circuit that outputs a pulse signal to levitate the sonobuoy, a disconnection mechanism that disconnects the sonobuoy from the vertical receiver array when the pulse signal is input, and a transmitter and receiver that disconnect the sonobuoy and the vertical receiver array when the pulse signal is input. The device is equipped with a power supply unit that supplies power to the machine.

In addition, when a sonobuoy is dropped onto the sea surface, a vertical receiver array connected to a mooring device is lowered, and the vertical receiver array collects sound data from the sea, classifies and compresses the submersible's sound pattern data. Underwater sound system having a data output means for outputting sound data of classified submarines to the outside via a transmitter when a command for transmitting the classification results to the outside is input from the receiver via the antenna. In the data collection device, power is supplied after surfacing, and position calculation means calculates the position of the sonobuoy using GPS satellite radio waves input from the antenna, and collected sound print data of the submersible and data indicating the position of the sonobuoy. and data output means for outputting the data to the outside via a transmitter.

The separation mechanism uses ultrasonic waves from the dropped command buoy to separate the vertical receiver array from the sonobuoy.

[Operation] In the present invention, when the sonobuoy is dropped onto the sea surface and the timer circuit reaches a preset time, a pulse signal for levitating the sonobuoy is output to the detachment mechanism and the power supply section, and the detachment mechanism activates the sonobuoy. is separated from the vertical receiver array and floated.

Then, the power supply unit supplies power to the receiver and transmitter, and if the received data of the receiver is a command to transmit the collected submersible's sound print data, the collected submersible's sound print data is transmitted. output to the outside via the machine.

In addition, after a sonobuoy is dropped on the sea surface and collects underwater sound data from a submersible from underwater, when it surfaces, the position of the sonobuoy is determined using GPS satellite radio waves input from the antenna, and the sound data collected from the submersible is determined. The pattern data and data indicating the position of the sonobuoy are output together to the transmitter.

Furthermore, the separation mechanism uses ultrasonic waves from the dropped command buoy to separate the vertical receiver array and sonobuoy and levitate them.

[Embodiment] FIG. 1 is a schematic diagram of an underwater sound data collection device showing a first embodiment of the present invention. This underwater sound data collection device will be explained as being mounted on the sonobuoy described above.

In the figure, (10) is a vertical receiver array in which a mooring device is connected to the receiver (4), and (11) is a vertical receiver array (1
(12) is a multiplexer circuit that selects one of the audio signals from amplifier (11); (13) is a multiplexer circuit (12) that amplifies the audio signal from amplifier (11);
) An A/D converter that converts the signal from ) into a digital signal,
(15) is an antenna for communicating with an artificial satellite (described later), and (16) is an antenna (15) when power is supplied.
), and (17) is a GLOBAL
PO3ITION SYSTEM (hereinafter referred to as GPS)
GP is a position calculation means that measures one's own position by receiving radio waves from an artificial satellite (not shown).
S, (18) modulates the collected data and sends it to the antenna (1
5) is a transmitter that outputs the data.

(20) is the input/output interface (hereinafter referred to as I10)
, (22) is a CPU, which has at least the means described below.

(22a) is a position data reading means, and the GPS (17
) and stores its location in memory (23
).

(22b) is a received command reading means, and the receiver (1
Read the received command output from 6), and if the received command is a command to send the collected submersible's soundprint data to the outside (hereinafter referred to as collection command),
This is to notify the data output means (22e), which will be described later, that the collection command has been received.

(22e) is a data output means, and when it is notified that the collection command has been received, after confirming that the transmitter (18) is in the operating state, the submersible (5) collected from the memory (23) ) soundprint data Ilo (20)
The signal is output to the transmitter (18) via the transmitter (18).

(22f) is the first classification means, and the A/D converter (1
The soundprint data from 3) is compared with the soundprint of the submersible (5) in the first database (24) stored in advance, and if they match, the soundprint data is processed as the soundprint of the submersible (5) by a compression circuit, which will be described later. (2
5).

(25) is a compression circuit, and the first classification means (22f'
) The soundprint data of the submersible (5) inputted from the submersible vessel (5) is bit-compressed and then stored in the memory (23).

(26) is a power source that operates when it comes into contact with water.

(27) is a first timer circuit which outputs a first pulse signal when the first set time comes, and outputs a second pulse signal when the second set time comes.

(28) is a sonobuoy disconnection mechanism that disconnects the sonobuoy from the vertical receiver array (10) when the first pulse signal is input from the first timer circuit (27).

(29) is a water injection mechanism, and the first timer circuit (27
) When a second pulse signal is input from the sonobuoy, seawater is injected into the sonobuoy and the sonobuoy sinks to the sea floor.

(30) is a power supply circuit, and the first timer circuit (
When the first pulse signal is input from the receiver (16), the GPS (17) and the transmitter (18)
).

FIG. 2 is a diagram illustrating the operation of a sonobuoy equipped with an underwater sound data collection device according to the first embodiment of the present invention.

In the figure, except for (2a) and (2b), (1) ~
(10) is the same as in FIG. 5 above, (2a) is the sonobuoy of the present invention, (2b) is a mooring device, (31) is a geostationary satellite, and (32) is a base station.

The operation of the underwater sound data collection device shown in FIG. 1 will be explained below using FIG. 2.

First, as shown in Fig. 2, when the sonobuoy (2a) equipped with the underwater sound data collection device of the present invention is dropped onto the sea surface by an airplane (1), the sonobuoy (2a) is placed in a vertical receiver array like a conventional one. (10) and the power source (26) becomes operational.

Then, as shown in FIG. 2, when the mooring device (2b) reaches the seabed, the CPU (22) becomes operational and preparations for collecting the sound print pigs are completed.

In this state, when the sound waves radiated from the submersible (5) are transmitted, each transfer device of the vertical receiver array (lO) of the underwater sound data collection device receives the sound waves, as shown in Figure 1. Then, it is output as an acoustic signal to the multiplexer circuit (12) via the amplifier (11).

Then, the multiplexer circuit (12) takes out one of the n-channel signals and outputs it to the A/D converter (13). The acoustic signal (hereinafter referred to as acoustic data) digitized by the A/D converter (13) is 1/0 (2
0>Grin, first classification means (22f') j: Output.

The first classification means (22f') compares the input soundprint data with the soundprint data (spectrum) stored in the database, and compares the input soundprint data with the soundprint data (spectrum) that needs to be stored (submarine).
If so, the voiceprint data is output to the compression circuit (25).

The compression circuit (25) bit-compresses the input voiceprint data and stores it in the memory (23).

This collection process continues until the sonobuoy is detached.

Next, when the first timer (27) reaches the set time (about one week in this case) and outputs the first pulse signal to the disconnection mechanism (2B) and the power supply circuit (30), the disconnection occurs. The separation mechanism (2B) separates the vertical receiver array (10) as shown in FIG. 2, floats the sonobuoy (2a) to the sea surface, and extends the antenna.

Further, the power supply circuit (30) is connected to the first timer circuit (2).
When the first pulse signal is input from the GPS (17)
), receiver (■6), transmitter (18) and power supply (26)
electrically connect the G P
S (17), receiver (16) and transmitter (18), and operate GPS (17), receiver (16) and transmitter (18) for the first time.

Then, the GPS (17) determines the position of the sonobuoy (2a) that has surfaced on the sea surface using radio waves from GPS satellites (for example, 4 or more) via the antenna (15), and the position data is transmitted to the I/ The data is input to the position data reading means (22a) via the position data reading means (22a), and is stored in a predetermined area of the memory (23) by the position data reading means (22a).

Also, at the same time as the first set time of the first timer circuit (27) is reached, the base station (32) transmits a collection command using a carrier wave and transmits it to the sonobuoy (2a) via the geostationary satellite (31). Suppose that it is done.

Next, the carrier wave is transmitted through the antenna (15) to the receiver (16).
), and when the receiver (16) detects the collection command, it reads the received command reading means (
22b).

If there is a collection command, the reception command reading means (22b) transmits the compressed collection data stored in the memory (23) to the transmitter (18) via the I/O (20).
Output to.

Then, the transmitter (18) outputs the modulated collected data from the antenna (15) and transmits it to the base station (32) via the communication satellite (31).

Next, the second set time comes and the first timer circuit (27
) When the second pulse signal is input to the water injection mechanism (29), the water injection mechanism (29) injects seawater into the sonobuoy (2a) and sinks the sonobuoy (2a) to the seabed as shown in FIG.

Therefore, power is not supplied to the GPS (17), receiver (16), and transmitter (18) until the set time, so data can be collected for a long time and the position can be determined by GPS (
17) and send it along with the collected data,
Although the base station (32) determines the route taken by the submersible (5) or surface ship (7), there is no need to correct the position because the surfaced sonobuoy (2a) hardly moves.

In addition, since the sound prints are collected underwater and the sonobuoy (2a) is submerged after the collected bootara is transmitted, confidentiality is improved.

FIG. 3 is a schematic configuration diagram of an underwater sound data collection device showing a second embodiment.

In the figure, (27a), (22ff) and (24a
), (10) to (30) are the same as in Fig. 1 above, and (22ff) is the second classification means, which stores the input soundprint in the database (24a). Submersible (5).

Comparing it with the watercraft (7) or the sound print of the collection command, if it is the sound print of the collection command, it indicates that the collection command has been sent to the data output means (22e) and the second timer circuit (27a) to be described later. It is something to inform.

(24a) is the second database, and the submersible (5)
In addition to the soundprints of the watercraft (7) and the watercraft (7), the soundprints of collection commands are also stored.

(27a) is a second timer circuit, and in addition to the operation described above, when it is notified that a collection command has been transmitted from the second classification means (22ff), the first timer circuit described above operates.
and a second pulse signal.

FIG. 4 is a diagram illustrating operation using the second embodiment.

In the figure, (1) and (31) are the same as those described above, and (2aa) is a sonobuoy equipped with the underwater sound data collection device of the second embodiment. (35) is a command buoy, which has a transmitter inside that outputs a collection command, and a transmitter (35a) that converts the output signal into an ultrasonic wave and radiates it is connected to the lower part of the transmitter. The operation of the underwater sound data collection device of the second embodiment shown in FIG. 3 will be explained below using FIG. 4. In this case, the sonobuoy (2aa
) is already under the sea.

First, as shown in Figure 4, if an airplane (1) drops a command buoy (35) onto the sea surface, then the command buoy (35) is dropped onto the sea surface.
35) starts its operation and emits a collection command ultrasonic wave from the transmitter (35a).

Then, as shown in Figure 3, the sonobuoy (2aa) receives the sound waves from each transmitter (4) of the vertical receiver array (lO) of the underwater sound data collection device, and sends the sound waves to the amplifier (
11) to the multiplexer circuit (12).

Then, the multiplexer circuit (12) takes out one signal from the n-channel signals and sends it to the A/D converter (13).
Output to. Audio signal (hereinafter referred to as audio data) digitized by the A/D converter (13)
(20) i: ,, second classification means (22f'f
)l: Output.

The second classification means (22ff) compares the input acoustic data with the sound print data (spectrum) stored in the second database (24a), and if it is the sound print data of the stored collection command, the sound data is collected. It notifies the data output means (22e) that the command has been sent, and also notifies the second timer circuit (27a).

When the second timer circuit (27a) is informed that the collection command has been transmitted, it outputs the first pulse described above to the power supply circuit (30) and the disconnection mechanism (28),
The subsequent operations are similar to those of the first invention.

Therefore, the collected data can be retrieved at any time, even before the set time.

[Effects of the Invention] As described above, according to the present invention, a sonobuoy is placed in the sea 4, and when a preset time comes, the sonobuoy is detached and floated, and power is supplied to the receiver and transmitter. Since the sound data collected by the submersible is output to a transmitter and transmitted, the sonobuoy can collect data for a long time, and since it is underwater, it has the advantage of being highly confidential. .

In addition, after a sonobuoy is dropped on the sea surface and collects sound data from the submersible from underwater, when it surfaces, the sonobuoy's position is determined using GPS satellite radio waves input from the antenna, and the submersible's sound print data is collected. and data indicating the position of the sonobuoy are output to the transmitter.
This has the advantage that it is not necessary to allocate a radio frequency to each buoy, and the position of the submersible can be easily determined.

Furthermore, the separation mechanism uses ultrasonic waves from the dropped command buoy to separate the sonobuoy and levitate it, making it possible to collect data as needed.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an underwater sound data collection device showing a first embodiment of the present invention, FIG. 2 is a diagram explaining the operation of the first embodiment, and FIG. 3 is a diagram showing the second embodiment. FIG. 4 is a diagram illustrating the operation of the second embodiment, and FIG. 5 is a diagram illustrating a conventional underwater sound collection method. In the figure, (lO) is a vertical receiver array, (11) is an amplifier, (12) is a multiplexer circuit, and (13) is an A
/D converter, (I5) is an antenna, (16) is a receiver,
(17) GPS, Og) C transmitter, (20) I/O, (22) C CPU, (22a) position data reading means, (22b) received command reading means, (22e) Data output means, (22f) is the first classification means, (25) is the compression circuit, (27) is the first timer circuit, (28) is the sonobuoy disconnection mechanism, (29) is the water injection mechanism, (30) is a power supply circuit, (31) is a geostationary satellite,
(32) is the base station, (22ff) is the second classification means, (
24a) is a second database, and (27a) is a second timer circuit.

Claims (3)

[Claims] (1) When the sonobuoy is dropped on the sea surface, it lowers the vertical receiver array connected to the mooring device, and uses the vertical receiver array to obtain sound data from the sea and classify the sound pattern data of the submersible. Underwater sound having a data output means for outputting sound print data of the classified submersible to the outside via a transmitter when a command for compressing the classification results and transmitting the classification results to the outside is input from the receiver. The data collection device includes a timer circuit that outputs a pulse signal to levitate the sonobuoy when a preset time is reached, and a timer circuit that disconnects the sonobuoy and the vertical receiver array when the pulse signal is input. An underwater sound data collection device comprising: a separation mechanism that separates the devices; and a power supply section that supplies power to the transmitter and receiver when the pulse signal is input. (2) When the sonobuoy is dropped on the sea surface, it lowers the vertical receiver array connected to the mooring device, and uses the vertical receiver array to obtain sound data from the sea and classify the sound pattern data of the submersible. data output means for outputting the classified soundprint data of the submersible to the outside via the transmitter when a command for compressing the data and transmitting the classification results to the outside is input from the receiver via the antenna; an underwater sound data collection device comprising: a position calculation means that is supplied with power after surfacing and calculates the position of the sonobuoy using GPS satellite radio waves inputted from the antenna; An underwater sound data collecting device characterized by comprising: data output means for outputting data indicating the position of the underwater sound data to the outside via the transmitter. (3) The underwater sound data collection device according to claim 1 or 2, wherein the separation mechanism separates the vertical receiver array from the sonobuoy using ultrasonic waves from a dropped command buoy.