JPH0875845A - Underwater transducer device - Google Patents

Abstract

PURPOSE: To enhance workability and safety in a hanging down/pulling up job, collect environment data at the same time as starting testing to enhance reliability by arranging a depth sensor, a sound pressure sensor, and a water temperature sensor and connecting with a single cable in an underwater-use transducer device. CONSTITUTION: An underwater-use transducer main body 1 with a built-in electroacoustic transducing device is connected with a signal cable 2 containing a conductive wire, and used by hanging down from a measuring ship 3. A water temperature sensor 4 and a depth sensor 5 are set on a chassis outer wall of the underwater-use transducer main body 1, and a sound pressure sensor 6 is set to the outer circumference of the signal cable 2 slightly apart from the underwater-use transducer main body 1 or to a supporting fixture 6 protruding from the underwater-use transducer main body 1. Signal lines 7, 8, 9 for connecting to the water temperature sensor 4, the depth sensor 5, and the sound pressure sensor 6 are formed integrally with the signal cable 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater acoustic transducer using an underwater transducer for transmitting and receiving underwater sound at a required depth, suspended from a measuring vessel by a signal cable containing a conducting wire. The present invention relates to an underwater transducer device provided with a sensor for monitoring a suspended depth of a transducer, a water temperature in the sea, background noise, and a transmitted sound pressure of a sound source.

[0002]

2. Description of the Related Art FIG. 4 is an overall view showing a conventional usage mode of this type of underwater transmitter / receiver device, and FIG. 5 is an enlarged perspective view of the main part thereof. A conventional technique will be described. When the underwater transmitter / receiver main body 101 is suspended from above the measurement ship 3 to transmit and receive underwater sound at a required depth for acoustic measurement, a test is performed in addition to the transmission level and background noise level. It is a general measuring method to record the suspension depth and the water temperature of the underwater transducer main body 101 as the recording of the condition.
Conventionally, the underwater transmitter / receiver main body 101 is
And a signal cable 102 (two-core shielded cabtire cable) containing a conductive wire, and connected around the underwater transducer main body 101, a commercially available hydrometer as a depth sensor 105 and a sound pressure sensor 106. The horn is fixed with a tying string 123 or the like, and the sensor signal cables 108 and 109 are carried into the measurement room on the ship along the hanging rope 121 of the underwater transducer body 101. The water temperature is measured separately by suspending the water temperature sensor 104. However, the signal cable 102 of the underwater transducer main body 101 and the water temperature sensor 104 are separately measured.
Since there is a possibility that the hanging signal cables 107 of 1 are entangled with each other, the water temperature sensor 104 is hung after the underwater transducer main body 101 is collected on the deck, and the water temperature sensor 104 is hung for measurement. Is going.

[0003]

On the sea, there is not only a calm sea surface but also stormy weather, and it is uncertain with the above-mentioned conventional fixing method in which a monitor sensor is attached to the transmitter / receiver main body 101. In addition, there are many cases where it becomes stormy during the sea test and the transceiver main body 101 is unavoidably recovered. In this case, the water temperature data cannot be acquired because the subsequent deck work is stopped. Even in the normal case, the suspension cable 121 and the signal cable 102
And signal cables 108 and 109 for a plurality of monitor sensors
Along with this, the cable sorting work at the time of suspension and collection of the transmitter / receiver main body 101 is complicated. The suspension rope 121 is moved by the drift of the measuring ship due to the tide and wind waves in the sea.
May be inclined rather than directly below the measuring vessel, and the pitching of the measuring vessel may apply a load to a cable other than the suspension rope 121 and break the cable. In the case of an underwater transducer having a circular appearance, a rotating force is generated due to the twist of the suspension rope 121 or the winding habit of the cable due to water flow and resistance, and the suspension state of the underwater transducer is unstable. Become.
The signal cables 109 and 108 for the sound pressure sensor 106 and the depth sensor 105 and the signal cable 102 for transmitting and receiving
It is common to bundle up the ropes and tie them up to the suspension rope 121, tie them up, and suspend them, but at the time of collection, those cables are wound around the suspension rope 121, and several workers are required for each cable. Is bundling each one on the deck while handling the cables. This operation must be done carefully by pulling and loosening while observing the condition of each other's cables.However, when working upset, apply excessive force to the cables while the cables are kinked. In some cases, cable damage is large. Also,
This type of work on a rocking deck is cumbersome and has safety implications. Therefore, the need and complexity for test measurement,
In some cases, it may be necessary to remove the monitor sensor at the discretion of the person in charge in consideration of sea conditions and weather conditions. In addition, the underwater transducer main body 101 is placed on the measurement ship 3 that is floating.
And the simultaneous suspension of the water temperature sensor 104 for measuring the water temperature must be avoided as much as possible because of the occurrence of entanglement between the cables. Therefore, the underwater transducer body and depth sensor,
An integrated structure of a water temperature sensor and a sound pressure sensor is required.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems. An underwater transducer device includes a depth sensor, a sound pressure sensor, and a water temperature sensor, and
Provided with an underwater transmitter / receiver device that has a structure to connect with a single cable, improves workability and safety in hanging and collecting, and collects environmental data at the same time as the test is performed, and improves the reliability of the data. The purpose is to do.

[0005]

[Means for Solving the Problems] Means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
As shown in FIG. 2, the first invention of the present application connects an underwater transducer main body 1 having a built-in electroacoustic transducer with a signal cable 2 containing a conductor, and suspends it from a measuring ship 3 for use. In the underwater transducer device, the water temperature sensor 4 and the depth sensor 5 are provided on the outer wall of the chassis of the underwater transducer body 1, and the sound pressure is applied to the outer circumference of the signal cable 2 slightly separated from the underwater transducer body 1. The sensor 6 is provided, and the signal lines 7, 8 and 9 of the respective sensors connected to the water temperature sensor 4, the depth sensor 5 and the sound pressure sensor 6 are provided integrally with the signal cable 2. Further, a second invention of the present application is, as shown in FIG. 3, in the above-mentioned first invention, from the underwater transducer main body 1 via a support tool 10 projecting from the underwater transducer main body 1. The sound pressure sensor 6 is provided at a slightly distant position. In the first and second inventions, the underwater transducer main body 1 may be suspended only by the signal cable 2, and the weight of the underwater transducer main body 1 may be supported by using a separately suspended rope or wire. You may do it.

[0006]

According to the first and second aspects of the present invention, the water temperature sensor 4, the depth sensor 5, and the sound pressure sensor 6 are compactly united around the outer wall of the chassis of the underwater transducer main body 1. It is provided. The signal lines 7, 8, 9 of each sensor are integrated with the signal cable 2 into which the signal line of the underwater transducer body 1 is inserted. Therefore, the cable handling work which is troublesome and hinders safety at the time of hanging and collecting is eliminated, and the safety is improved. Also,
Since environmental data can be obtained at the same time as the test,
The reliability of test data for R & D products will be further improved than before.

[0007]

1 is an overall view showing a mode of use of a submersible wave transceiver device according to a first embodiment of the present invention, and FIG. 2 is an enlarged perspective view of the main part thereof. The first embodiment will be described with reference to FIG. An underwater transducer main body 1 having a built-in electroacoustic transducer is used by being suspended from a measuring vessel 3 by a signal cable 2 containing a conductor. Since the underwater transducer main body 1 uses an elliptical bent transmission type capable of transmitting at a relatively low frequency with respect to its dimensions, the suspension is stable in the direction along the flow due to water flow and resistance. It goes down. The outer peripheral surface of this ellipse is the transmitting / receiving surface 1-1, and the end surface is the chassis 1-2.
It has an outer wall. As shown in FIG. 2, the depth sensor 5,
The water temperature sensor 4 and the sound pressure sensor 5 are incorporated in the underwater transducer body 1 as an integral structure. Of these monitor sensors, the depth sensor 5 and the water temperature sensor 4 are fixed to the upper end surface of the outer wall of the chassis 1-2 of the underwater transducer main body 1 with a watertight connector by tightening with a fitting nut, and a protective cover is attached. There is. The signal from the sensing unit is connected to an electronic circuit inside the main body, voltage-amplified and impedance-converted, and sent to a recording and display unit on the ship via a signal cable. If either the water temperature sensor 4 or the depth sensor 5 is not used, the sensing section may be removed and a waterproof cap may be applied to that section.

The sound pressure sensor 6 measures the background noise and monitors the transmitted sound pressure of the underwater transducer. The sound pressure sensor 6 can be attached and fixed at an arbitrary position. However, in the case of a low frequency which is usually used frequently, the wavelength is sufficiently long and omnidirectional with respect to the size of the transmitting / receiving surface. In the first embodiment, 1 m from the central axis of the transmitting / receiving surface
The signal cable 2 is clamped in the middle of the upper portion of the signal cable 2 where the required distance is obtained and fixed by a tightening band. That is, in order to monitor the transmission sound pressure at a distance of 1 m according to the definition of the transmission sensitivity, the mounting portion is installed at a distance of 1 m from the center of the vibration surface. Specifically, in the case of the first embodiment shown in FIG. 2, the sound pressure sensor 6 is divided into two parts in the middle of the signal cable 2 connected to the transducer main body 1 (1 m from the center of the vibration surface). After the signal cable 2 is attached so as to sandwich it, the upper and lower ends of the sound pressure sensor 6 are tightened and fixed by the fastening bands 11, 11. The specific configuration of the sound pressure sensor 6 is as follows. Sound pressure sensor 6
PVDF (polyvinylidene fluoride) was used for the sensing portion 12 of the above, and a cylindrical casing made of synthetic resin having a diameter of several centimeters and a length of several tens of centimeters was used to form the sensing portion 12 of PVDF. That is, a cylinder made of PV (made of vinyl chloride) is divided into two parts, PVDF is adhered to the outer peripheral surfaces of the cylinders, and the whole is molded with urethane rubber for waterproofing. Is out. For attachment to the signal cable 2, the sensitive portion 12 divided into two parts is assembled so as to be sandwiched around the signal cable 2, and then the upper and lower end portions of the sensitive portion 12 are clamped to a dedicated band 11.
It is designed to be fixed with. Note that a cushioning material is inserted between the signal cable 2 and the sensing unit 12 to prevent the vibration of the signal cable 2 from being transmitted to the sensing unit 12. Thirteen
Is a PVC semi-cylindrical substrate.

Next, the structure of the signal cable 2 will be described.
The signal cable 2 is a multi-core shielded cabtire cable, and is characterized in that the signal line of each sensor is constituted by one signal cable 2 of the underwater transceiver main body in which the number of core lines is increased. The signal cable 2 includes a signal line 7, 8, 9, 14 of a two-core shield, a power supply line 15 for supplying an electronic circuit of each sensor, and a large power supply line for transmitting a sound wave to each sensor. 16, an insulating material 17, a fiber tension member 18, an outer sheath 19, and the like. In this way, the signal cable 2 has a core wire added and a signal wire of a two-core shield is used for each monitor sensor to avoid mixing of electrical noise between the core wires as much as possible and at the same time from the underwater transducer main body 1. The cables are combined into one.

In the present invention, as shown in the first embodiment of FIG. 2, three types of monitors, a depth sensor 5, a water temperature sensor 4, and a sound pressure sensor 6, are attached to the underwater transducer body 1,
The signal output was integrated into one signal cable 2 together with a power supply line. Each sensor is attached and fixed at a position that does not impair the intended functional performance and does not hinder the hanging and collecting work. They can be attached / detached and replaced from the underwater transducer main body 1 by a connector.

When transmitting at a high frequency when the wavelength is relatively short compared to the size of the vibrating surface of the underwater transducer, the transmission level differs depending on the direction of the underwater transducer. Therefore, as in the second embodiment according to the present invention shown in FIG. 3, the sound pressure sensor 6 may be set in the target direction using the support 10. The support 10 is constituted by an inverted L-shaped arm, a sound pressure sensor 6 is provided at the lower end thereof, and a cylindrical attachment 20 fixed to the base of the support 10 is fitted to the base of the signal cable 2. And can be freely rotated and fixed.

[0012]

As described above, in the underwater transducer of the present invention, the depth sensor, the water temperature sensor and the sound pressure sensor are integrated with the body of the underwater transducer, so that the environment of hanging depth and water temperature is reduced. Information and sound pressure data can be acquired at the same time,
In the test work, since there is only one signal cable, there is an advantage that the work of separating the cable on the deck at the time of hoisting under suspension is simplified and the safety is improved. In addition, since environmental data can be acquired simultaneously with the execution of the test, the reliability of test evaluation of R & D products and the like is improved as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is an overall view showing a mode of use of a submersible wave transceiver according to the present invention.

FIG. 2 is a partially cutaway perspective view of the underwater transducer according to the first embodiment of the present invention.

FIG. 3 is a perspective view of an underwater transducer according to a second embodiment of the present invention.

FIG. 4 is an overall view showing a usage mode of a conventional underwater transducer.

FIG. 5 is a perspective view of a conventional underwater transducer.

[Explanation of symbols]

1 underwater transducer main body, 2 signal cable, 3 measuring vessel, 4 water temperature sensor, 5 depth sensor, 6 sound pressure sensor, 7, 8, 9, 14 signal line, 10 support tool, 11
Fastening band, 12 sensing part, 13 base, 15 power line, 16 supply line, 17 insulating material, 18 tension member, 19 outer sheath, 20 mounting fixture

Claims (2)

[Claims] 1. An underwater transducer body having a built-in electro-acoustic transducer is connected by a signal cable containing a conductor.
In an underwater transducer device that is hung from a measurement ship, a water temperature sensor and a depth sensor are provided on the outer wall of the chassis of the underwater transducer body, and the outer circumference of the signal cable is a little distant from the underwater transducer body. An underwater transceiver device, characterized in that a sound pressure sensor is provided in the water temperature sensor, and the signal line of each sensor connected to the water temperature sensor, the depth sensor and the sound pressure sensor is provided integrally with the signal cable. 2. An underwater transducer device in which an underwater transducer body having a built-in electroacoustic transducer is hung from a measurement ship by a signal cable containing a conductor, and the underwater transducer body is used. A water temperature sensor and a depth sensor are provided on the outer wall of the chassis, and a sound pressure sensor is provided at a position slightly distant from the underwater transducer main body through a support projecting from the underwater transducer main body. An underwater transmitter / receiver device, characterized in that a signal line of each sensor connected to the sensor and the sound pressure sensor is provided in a signal cable.