JPH09152476A - Buoy-type acoustic detecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a signal level and obtain a high output without enlarging a sensor part by setting a signal relay part between a floating part and the sensor part and electrically connecting the floating part, sensor part and signal relay part by a suspension cable. SOLUTION: When an observer inputs a reception instruction signal to a floating part 1, a switching control signal is input from the floating part 1 to transmission/reception-switching parts 11, 12 via suspension cables 4, 5, and a transmission path is switched to the side of a reception signal system S1 by the switching parts 11, 12. Then, an aquatic acoustic signal S1a detected by a sensor part 2 is input to a filter part 14 via the cable 5, switching part 12 and a receiver part 13. Noises overlapped during the transmission are removed at the filter part 14. A signal S1c output from the filter part 14 is input to an amplifier part 15, and an electric energy lost during the transmission in a long distance is reinforced. Thereafter, a signal S1d is input to the floating part 1. The aquatic acoustic signal is transmitted in this manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buoy type acoustic detecting device, and more particularly to a buoy type acoustic detecting device which has a sensor unit suspended in the sea and is used by being expanded after being put into the sea.

[0002]

2. Description of the Related Art FIG. 3 is a schematic block diagram of a conventional buoy type acoustic detecting device. The conventional buoy type acoustic detection device has a floating part 5
1, sensor unit 52, floating portion 51 and sensor unit 52
And a hanging cable portion 53 for transmitting a signal between them.

A transmitter / receiver (not shown) for transmitting and receiving signals to and from an observer is provided on the levitation part 51, and a cylindrical part 51a is formed below the levitation part 51.

The sensor section 52 is provided with a transmitting section (not shown) for transmitting sound waves into the water and a receiving section (not shown) for receiving reflected sound from an object in the water, and is suspended above it. A cable storage portion 52a is formed.

The suspension cable portion 53 has two roles, that is, a suspension cable for suspending the sensor portion 52 and a signal transmission path.

In this type of buoy, the signal received by the sensor unit 52 is always transmitted to the levitation unit 51, and the levitation unit 51 further transmits the received signal to the observer. If there is, transmission / reception switching is performed by a switching signal from the levitation unit 51, and a sound wave is transmitted from the sensor unit 52 into the sea.

Before the buoy was dropped into the sea,
The hanging cable portion 53 is housed in the hanging cable housing portion 52a in the sensor portion 52, and the cylindrical portion 51 in the floating portion 51 is housed.
The sensor unit 52 with the hanging cable unit 53 stored in a.
Is configured to be stored.

Further, an acoustic detecting device of this type is (1) Japanese Patent Laid-Open No. 59-92343 and (2) Japanese Patent Laid-Open No. 62-5.
It is disclosed in Japanese Patent No. 2485.

[0009]

However, in the conventional buoy type acoustic detecting device, if the suspension depth of the sensor portion becomes deep, the suspension cable length becomes longer and the data transmission path also becomes longer. There is a drawback that the error rate of signal transmission becomes high due to the attenuation of the signal level and the attenuation of the signal level.

In order to secure a sufficient signal level for reducing the signal level attenuation and the signal transmission error rate, it is conceivable to provide a high-output driver section in the signal output section of the sensor section. However, since a high-output driver section leads to a larger circuit scale and a larger capacity of power supply to the drive section, it should be applied to a buoy type acoustic detector in which it is difficult to increase the sensor section due to buoy size restrictions. Is not preferable.

Further, the prior arts (1) and (2) do not disclose a technique for increasing the output of the signal output from the sensor unit attached to the end of the suspension cable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a buoy type acoustic detecting device capable of increasing the signal level output without increasing the size of the sensor section.

[0013]

In order to solve the above-mentioned problems, the present invention provides a floating part floating on the sea surface, a sensor part suspended in water, and a signal located between the floating part and the sensor part. It is characterized by having a relay section and a suspension cable electrically connected between the signal relay section and the floating portion and between the signal relay section and the sensor section, respectively.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A signal relay portion is inserted between a floating portion and a sensor portion, a signal output from the sensor portion is amplified by the signal relay portion, and then input to the floating portion.

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a buoy type acoustic detection device according to the present invention.

The buoy type acoustic detecting device comprises a levitation part 1, a sensor part 2, a signal relay part 3 located between the levitation part 1 and the sensor part 2, a signal relay part 3 and the levitation part 1, and a signal relay part. Three
And the hanging cables 4 and 5 electrically connected between the sensor section 2 and the sensor section 2, respectively.

A transmitter / receiver (not shown) and a transmitter / receiver antenna (not shown) for transmitting / receiving a signal to / from an observer are provided on the levitation part 1, and a cylindrical part 1a is provided below the levitation part 1. Are formed.

The sensor section 2 is provided with a transmitting section (not shown) for transmitting sound waves in the water and a receiving section (not shown) for detecting acoustic information in the water and converting it into an electric signal.

The signal repeater 3 includes a repeater 3a, which will be described later,
A seawater battery 3b for supplying power to the relay 3a and a storage section (not shown) for storing the hanging cables 4 and 5 are provided. The repeater 3a reinforces the electrical energy of the acoustic signal that is damaged by long-distance transmission.

The suspension cables 4 and 5 have two functions of a suspension rope for suspending the sensor unit 2 and the signal relay unit 3 and a signal transmission path.

Before the buoy was dropped into the sea,
The suspension cables 4 and 5 are stored in the storage portion in the signal relay portion 3, and the suspension cables 4 and 5 are stored in the cylindrical portion 1a in the floating portion 1.
The signal relay unit 3 and the sensor unit 2 in the state of storing the sensor are stored.

Next, the configuration of the signal relay section 3 will be described. FIG. 2 is a configuration diagram of the signal relay unit.

For the sake of convenience, the signal output from the sensor unit 2 to the levitation unit 1 will be referred to as a reception signal S1, and the signal output from the levitation unit 1 to the sensor unit 2 will be referred to as a transmission signal S2.

The repeater 3a is composed of transmission / reception switching units 11 and 12 for interchanging transmission / reception of signals, and reception signal S1 system and transmission signal S2 system switched by the transmission / reception switching units 11 and 12.

The reception signal S1 system includes a receiver section 13 for receiving a signal S1a output from the sensor section 2 via the transmission / reception switching section 12, and a signal S1 output from the receiver section 13.
a filter unit 14 for performing band limitation of b, and a filter unit 14
The signal S1c output from the amplifier 15 is output to the levitation part 1 via the transmission / reception switching part 11.

The transmission signal S2 system includes a receiver section 16 that receives a signal S2a output from the levitation section 1 via the transmission / reception switching section 11, and a signal S2b output from the receiver section 16.
Of the signal S2c output from the filter unit 17, and the signal S2d output from the amplifier unit 18 is sent to the sensor unit 2 via the transmission / reception switching unit 12. Is output.

Further, the seawater battery 3b is provided with these relays 3a.
Power is supplied to each part of the
Power is also supplied to the transmitting / receiving unit of the floating portion 1 and the sensor unit 2 via the.

Next, the operation of the buoy type acoustic detecting device will be described. First, the reception signal system S1 in which a signal is transmitted from the sensor unit 2 to the floating portion 1 will be described.

A signal from the observer instructing reception is sent to the levitation surface 1
Is input to the transmission / reception switching units 11 and 12 from the floating portion 1 via the suspension cable 4, and the transmission / reception switching units 11 and 12 switch the transmission path to the reception signal system S1 side.

Next, the underwater acoustic signal S1a detected by the sensor unit 2 is input to the filter unit 14 via the suspension cable 5, the transmission / reception switching unit 12, and the receiver unit 13, and is being transmitted by the filter unit 14. The noise superimposed on is removed.
Then, the signal S1c output from the filter unit 14
Is input to the amplifier unit 15, and the amplifier unit 15 performs signal amplification to reinforce the electrical energy damaged by long-distance transmission.

After that, the amplified signal S1d is input to the levitation section 1 via the transmission / reception switching section 11 and the suspension cable 4, and the levitation section 1 transmits an underwater acoustic signal to the observer.

Next, the transmission signal system S2 for transmitting a signal from the floating portion 1 to the sensor portion 2 will be described.

A signal from the observer instructing transmission is sent to the levitation surface 1
Is input to the transmission / reception switching units 11 and 12 from the floating portion 1 via the suspension cable 4, and the transmission / reception switching units 11 and 12 switch the transmission path to the transmission signal system S2 side.

Next, noise that is input from the levitation unit 1 to the filter unit 17 via the suspension cable 4, the transmission / reception switching unit 11 and the receiver unit 16 and that is superimposed during transmission is removed by the filter unit 17. Then, the signal S2c output from the filter unit 17 is input to the amplifier unit 18, and the amplifier unit 18 performs signal amplification to reinforce the electrical energy damaged by the long distance transmission.

Thereafter, the amplified signal S2d is input to the sensor unit 2 via the transmission / reception switching unit 12 and the suspension cable 5, and the sensor unit 2 transmits a sound wave into the water.

When the sensor unit 2 is dropped in water,
The sensor unit 2 and the signal relay unit 3 are integrally sunk halfway, and are separated and further sunk when a certain depth is reached.

[0037]

According to the present invention, the floating portion floating on the sea surface, the sensor portion suspended in water, the signal relay portion located between the floating portion and the sensor portion, and the signal relay portion. Since the suspension cables electrically connected between the floating portions and between the signal relay unit and the sensor unit are provided, and the signal transmitted to the suspension cable is amplified by the signal relay unit, the sensor unit is configured as follows. It is possible to increase the signal level output without increasing the size.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a buoy type acoustic detection device according to the present invention.

FIG. 2 is a configuration diagram of a signal relay unit of the acoustic detection device.

FIG. 3 is a schematic configuration diagram of a conventional buoy type acoustic detection device.

[Explanation of symbols]

 1 Floating part 2 Sensor part 3 Signal relay part 3a Repeater 4,5 Suspended cable 11,12 Transmission / reception switching part 15,18 Amplifier part

Claims (4)

[Claims] 1. A floating part floating on the sea surface, a sensor part suspended in water, a signal relay part located between the floating part and the sensor part, between the signal relay part and the floating part, and A buoy type acoustic detection device comprising a signal relay section and a suspension cable electrically connected between the sensor section. 2. The signal relay unit has a function of amplifying a transmission signal from the floating unit to the sensor unit and a function of amplifying a reception signal from the sensor unit to the floating unit. The buoy type acoustic detection device according to claim 1. 3. The buoy type acoustic detection device according to claim 2, wherein the signal relay unit has a switching unit that passes either one of the transmission signal and the reception signal. 4. The buoy type acoustic detection device according to claim 1, wherein the signal relay portion has a storage portion for the hanging cable.