JP2020044868A - Rotation suppression device of underwater sensor, underwater sensor and rotation suppression method of underwater sensor - Google Patents

Abstract

To suppress an excessive twisting of a cable due to rotation of an underwater sensor used in a suspended state by a cable.SOLUTION: An underwater sensor 2 is rotatably supported around a vertical axis C inside a case 1. The underwater sensor 2, for example, is composed of a receiver to detect sound waves, and also is composed of a transmitter to emit a sound wave into the water and of the receiver to detect the reflected sound wave for an active system. A regulating member 3 is provided between the case 1 and the underwater sensor 2, and the regulating member 3 is movably supported between a first position intersecting with the rotation trajectory of the underwater sensor 2 and a second position retracting upward from the first position and not intersecting with the rotation trajectory of the underwater sensor 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an underwater sensor rotation suppressing device, an underwater sensor, and a method of suppressing rotation of an underwater sensor.

The underwater sensor suspended vertically by a cable from a ship or aircraft and settled to a predetermined depth in the water, and then lifted and collected. When the underwater sensor rotates around the vertical line of the underwater sensor, a break occurs due to torsion in the cable. Therefore, it is required to prevent the underwater sensor from rotating around the vertical line.
As a related technique, there is a posture stabilizing mechanism of an underwater sensor described in Patent Document 1. The attitude stabilizing mechanism is provided with deployable wings in the underwater sensor, and stabilizes the attitude by deploying the wings, while reducing the resistance at the time of subsidence by folding the wings.

JP 2000-153798 A JP-A-2017-036822 JP 2013-22494A

However, in the underwater sensor described in Patent Literature 1, no special consideration is given to the problem that the cable is excessively twisted due to the rotation of the underwater sensor.
As a mechanism for blocking the influence of the rotation of the underwater sensor on the cable, there is a mechanism for restricting rotation by a gear mechanism described in Patent Document 2 or a mechanism for restricting rotation of a cylinder described in Patent Document 3; It cannot be applied directly to suppression of twisting of the cable due to rotation of the sensor.

On the other hand, a method of contacting a side of the recovered underwater sensor with a frictional material such as rubber to prevent the underwater sensor from rotating around the vertical line, or a method of completely fixing the recovered underwater sensor with a fixture. It is possible to fix it to
However, if the side of the underwater sensor in the recovered state is brought into contact with a rubber or other substance having frictional force to prevent the underwater sensor from rotating around the vertical line, the frictional force acting on the underwater sensor due to the vibration of the ship or aircraft will increase. And the effect of preventing the underwater sensor from rotating around the vertical line may be lost.
Also, if you try to completely fix the recovered underwater sensor with the fixture, the vibration of the ship or aircraft will directly affect the underwater sensor, causing a measurement error, and this vibration will be around the vertical line of the underwater sensor. An excessive rotation torque may be generated, which may cause damage to the underwater sensor or the fixture.

  An object of the present invention is to suppress excessive twisting of a cable due to rotation of an underwater sensor.

In order to solve the above problems, a first aspect of the present invention has the following configuration.
A rotation suppressing device provided between an underwater sensor suspended from a moving body and brought into a submerged state and a case provided on the moving body and housing the underwater sensor, the rotation suppressing device being supported by a case, A regulating member movably supported between a first position that intersects the rotational locus of the sensor and a second position that does not intersect with the rotational locus of the underwater sensor; and moving the restricting member from the second position. An urging portion for urging toward the first position.

In order to solve the above problem, a second aspect of the present invention has the following configuration.
A step of suspending the underwater sensor from above, and a regulating member movably supported between a first position intersecting the rotation locus of the underwater sensor and a second position not intersecting the rotation locus of the underwater sensor. Energizing toward the first trajectory, and rotating the restricting member from the first position to the second position against the urging by a torque acting on the underwater sensor. Canceling the regulation.

  According to the present invention, the rotation of the underwater sensor can be suppressed or released according to the rotational force applied to the underwater sensor.

FIG. 2 is a perspective view showing a minimum configuration example of the rotation suppressing device of the present invention. FIG. 2 is a side view in a normal state of the rotation suppressing device according to the first embodiment of the present invention. FIG. 3 is a perspective view of a configuration example of an underwater sensor including the rotation suppressing device of FIG. 2. FIG. 3 is a side view of the rotation suppressing device of FIG. 2 in a rotation restricted state. FIG. 3 is a side view of the rotation restricting device of FIG. 2 at the end of a rotation restricted state.

FIG. 1 shows a minimum configuration example of the rotation suppressing device according to the first embodiment.
Reference numeral 1 denotes a case provided in a moving body such as a ship or an aircraft, and accommodating the underwater sensor collected in the moving body. Inside the case 1, an underwater sensor 2 is accommodated in a state of being suspended along a vertical axis C. The underwater sensor 2 includes, for example, a receiver (not shown) for detecting a sound wave in the case of a passive system, and an oscillator (not shown) for emitting a sound wave in the water in the case of an active system. And a receiver (not shown) for detecting sound waves radiated from and reflected by the search target.
A restricting member 3 is provided between the case 1 and the underwater sensor 2. The restricting member 3 has a first position (a position shown in FIG. It is movably supported between a second position that deviates from the first position and does not intersect with the rotation locus of the underwater sensor 2. The position at which the regulating member 3 intersects with the rotation trajectory of the underwater sensor 2 is not limited to the fin in the illustrated example, but may be another part of the underwater sensor 2.

  In the rotation suppressing device configured as described above, the rotation of the underwater sensor 2 housed in a rotatable state with respect to the case 1 is caused by the urging of an urging member (not shown) in the second position shown in FIG. The position is regulated by the regulating member 3 at the position 1. Further, the rotation of the underwater sensor 2 can be permitted by the regulation member 3 being at the second position deviating from the first position.

Referring to FIG. 1, a method for suppressing rotation of the underwater sensor according to the second embodiment will be described.
In this method, the step of suspending the underwater sensor 2 from above, and moving between a first position intersecting the rotation locus of the underwater sensor 2 and a second position not intersecting the rotation locus of the underwater sensor 2 Urging the controllable supporting member 3 toward the first position, and applying a torque acting on the underwater sensor to press the restricting member 3 from the first position against the urging. And the step of canceling the regulation of the rotation by moving to the position 2 is executed.

  In the rotation suppressing method configured as described above, in the normal state, the rotation of the underwater sensor 2 with respect to the case 1 is restricted by the restricting member 3 located at a position intersecting the rotation trajectory of the underwater sensor 2, and the rotation of the underwater sensor 2 is not less than a predetermined value. When the regulating member 3 is retracted by receiving the torque, the regulation is released and the underwater sensor 2 can be rotated.

With reference to FIGS. 2 to 5, a configuration example of an underwater sensor including the rotation suppression device according to the first embodiment will be described.
3 is an underwater sensor main body which is, for example, a passive type or active type sound wave sensor. Above the underwater sensor main body 200, a plurality of fins 201 are suspended from a moving body. It is attached radially around the lowered cable 202 (vertical axis C). The radial ends of the plurality of fins 201 are fixed to a cylindrical outer cylinder 203 and connected to each other.

The underwater sensor main body 200 is accommodated in a case 1 fixed inside the body of a moving body such as a ship or an aircraft in a state of being suspended along a vertical axis C.
A support member 107 fixed to the case 1 or the body of the moving body is provided above the outer cylinder 203 of the case 1, and the rotation suppressing device 100 is provided on the support member 107. .

Details of the rotation suppressing device 100 will be described with reference to FIG.
The support member 107 is provided with a support shaft 105, and the support shaft 105 rotatably supports the base ends of levers 101 and 102 serving as regulating members.
A coil-shaped torsion spring 103 as an urging member is provided between the support shaft 105 and the lever 101, and the torsion spring 103 is compressed between the support member 107 and the lever 101. When the lever 101 rotates counterclockwise as indicated by an arrow A in FIG. 2 around the support shaft 105, the lever 101 is elastically deformed in the winding direction of the coil, thereby restoring the lever 101 to the position shown in FIG. A clockwise torque as indicated by arrow B is generated. The lever 102 is elastically deformed in the coil winding direction during the clockwise rotation of FIG. 2 by the torsion spring 104 as an urging member, thereby generating a counterclockwise torque for restoring the lever 102 to the position of FIG. Occur. That is, the torsion springs 103 and 104 function as urging members that apply torque to the levers 101 and 102 as regulating members.

  By connecting the end of the torsion spring 103 (a linear portion closer to the end than the coil portion) to the lever 101 and the support member 107, the lever 101 can rotate around the support shaft 105 in both directions. On the other hand, a rotational torque is generated in the restoring direction, and the lever 101 returns to the original position shown in FIG. Similarly, by connecting the end of the torsion spring 104 to the lever 102 and the support member 107, the rotational torque in the restoring direction with respect to the rotation of the lever 102 about the support shaft 105 in both directions is reduced. Then, the lever 102 returns to the original position.

  On the other hand, the end of the torsion spring 103 can be separated from at least one of the lever 101 and the support member 107 (when the lever 101 is separated from the support member 107 when the lever 101 rotates clockwise, no force is applied and no deformation occurs. 2), when the lever 101 rotates counterclockwise, a clockwise restoring torque acts from the torsion spring 103 to return to the position shown in FIG. 2, and when the lever 101 rotates clockwise, the lever 101 rotates. 2 can be rotated counterclockwise by the gravity acting on 101 to return to the position of FIG. Further, the end of the torsion spring 104 can be separated from at least one of the lever 101 and the support member 107 (when the lever 101 is separated from the support member 107 when the lever 101 rotates clockwise, no force is applied and no deformation occurs). Then, when the lever 101 rotates counterclockwise, a clockwise restoring torque acts from the torsion spring 103 to return to the position of FIG. 2, and when the lever 101 rotates clockwise, the lever 101 acts on the lever 101. Due to the gravitational force, it can rotate counterclockwise and return to the position of FIG.

The levers 101 and 102 are formed in shapes curved in opposite directions to each other. When the levers 101 and 102 come into contact with the fin 201 as shown in FIG. In order to reduce the impact on the fin 201 and the underwater sensor main body 200 integrated with the fin 201 upon contact with the fin 201, it is considered.
The lengths of the levers 101 and 102, the rotation range, and the spring constants of the torsion springs 103 and 104 are as shown in FIG. At a position that intersects the rotation locus of the fin 201 (in the left-right direction in FIGS. 4 and 5) and receives a force exceeding the threshold value, the position retreated upward from the rotation locus of the fin 201 as shown in FIG. It is set to be able to move to.

The operation and operation of the rotation suppressing device configured as described above will be described.
The underwater sensor main body 200 rotates clockwise or counterclockwise around the vertical axis C in FIG. 3 integrally with the fin 201 by a torque generated due to an external force or a twist of the cable.

FIG. 2 shows an initial position where the levers 101 and 102 are not subjected to external force.
In this initial position, when the fin 201 rotates and moves rightward in FIG. 2, it contacts the lever 101. Here, when the force acting on the fin 201 exceeds a threshold value, as shown in FIG. 4, the fin 201 elastically deforms so as to contract the torsion spring 103 of the lever 101, and the counterclockwise direction indicated by the arrow A in FIG. To rotate.

    When the force acting on the lever 101 from the fin 201 further increases, as shown in FIG. 5, the fin 201 further rotates counterclockwise to reach a position where the fin 201 also contacts the lever 102. While rotating in the counterclockwise direction indicated by the arrow A in FIG. 5, it further moves to the right in FIG. That is, the fin 201 rotates together with the underwater sensor main body 200 while pushing the levers 101 and 102 upward by a force exceeding the threshold value.

  When the fin 201 moves further to the right than the position in FIG. 5, the lever 101 rotates clockwise as indicated by the arrow B in FIG. 5 and returns to the position in FIG. 2 due to the elastic restoring force of the torsion spring 103. The lever 102 rotates clockwise in FIG. 5 by gravity or the elastic restoring force of the torsion spring 104 and returns to the position in FIG.

  Thereafter, the fins 201 following the fins 201 shown in FIGS. 4 and 5 successively contact the levers 101 and 102 and continue rotating while pushing up the levers 101 and 102 as long as a force equal to or greater than a threshold is applied to the fins 201.

  By the action of the levers 101 and 102, the rotation of the underwater sensor main body 200 can be restricted, or the restriction of the rotation can be released when a force greater than a predetermined force is applied. Of the underwater sensor body 200 and the fins 201 when a large force exceeding the threshold is applied, and the case 1 or the supporting structure of the case 1 and the ship, aircraft or the like supporting the case 1 are prevented. The effect can be reduced.

In the embodiment, a pair of levers 101 and 102 curved in opposite directions are used. However, a single lever biased by a torsion spring may be used so that the lever can be restored in both directions around the support shaft.
Further, in the embodiment, the levers 101 and 102 are not substantially elastically deformed by using the torsion springs 103 and 104. However, the levers themselves may be elastically deformed by using a leaf spring-like lever. .
Also the shape of the lever. The number is not limited to the embodiment, and may be changed as appropriate according to the number and shape of the fins.

The underwater sensor is not limited to a sensor that detects vibration such as sound waves, but may be a sensor that detects light, magnetism, or other electromagnetic waves.
Further, in the embodiment, the regulating member is biased in a predetermined direction by the biasing member. However, the regulating member itself is configured to be elastically deformable, for example, protruded from the inside of the case, and is brought into contact with a part of the underwater sensor. A configuration in which the rotation is restricted or the restriction is released by elastic deformation may be adopted. With this configuration, the number of components can be reduced as compared with a case where an urging member is separately provided.
In the embodiment, the regulating member is configured to contact with the fin of the underwater sensor to regulate the rotation. However, a portion other than the fin of the underwater sensor, for example, the outside of a part of the underwater sensor main body in order to contact the regulating member. A configuration may be adopted in which the regulating member is brought into contact with a member protruding from the second member. By employing such a configuration, it is possible to prevent the fins and the underwater sensor from being damaged by contact with the regulating member.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes design changes and the like without departing from the gist of the present invention.

  INDUSTRIAL APPLICATION This invention can be utilized for the support of the underwater sensor suspended from a moving body.

DESCRIPTION OF SYMBOLS 1 Case 2 Underwater sensor 3 Restriction member 100 Rotation suppression device 101, 102 Lever (restriction member)
103, 104 Torsion spring 105 Support shaft 107 Support member 200 Underwater sensor main body 201 Fin 202 Cable 203 Outer cylinder

Claims (7)

A rotation suppression device provided between an underwater sensor suspended from and supported by a moving body and a case provided in the moving body and housing the underwater sensor,
A first member that is supported by the case and intersects the rotation locus of the underwater sensor, and a regulating member that is movably supported between a second position that does not intersect the rotation locus of the underwater sensor;
An urging member for urging the regulating member from the second position toward the first position;
A rotation suppressing device having a. The underwater sensor includes a plurality of fins that rotate integrally with the underwater sensor main body around the vertical axis,
2. The rotation suppressing device according to claim 1, wherein the restriction member releases the restriction on the rotation of the underwater sensor by moving to a second position that does not intersect the rotation locus of the fin. 3. The regulating member is a lever rotatably supported around an axis horizontally disposed above the fin,
The biasing member is elastically deformed by rotation of the lever about the axis in one direction,
The rotation suppressing device according to claim 1.   The rotation suppressing device according to claim 3, wherein the lever has a curved shape, and a pair of the levers are provided with the bending directions opposite to each other. An underwater sensor suspended from a moving body and supported,
A case provided on the moving body to accommodate the underwater sensor;
An underwater sensor comprising: the rotation suppression device according to claim 1 between the underwater sensor and the case. Suspending the underwater sensor from above,
Urging said first position intersecting the rotational locus of the water sensor, toward the movably supported regulating member said first position and a second position which does not intersect the rotational locus of the water sensor Energizing process,
Removing the regulation of rotation by moving the regulating member from the first position to the second position against the bias by the torque acting on the underwater sensor;
A method for suppressing rotation of an underwater sensor, comprising: Applying a rotational force about the vertical axis to the underwater sensor,
Moving the lever from the first position to a second position by the rotational force;
The method for suppressing rotation of an underwater sensor according to claim 6, further comprising:

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