JPH0552782U - Underwater sensor support device - Google Patents

Abstract

(57) [Abstract] [Purpose] The weight is heavy and the hanging cable is easily broken or the cost is high. Also, the length of the extension cable for reducing the sway of the underwater sensor due to waves etc. A buoyant body is installed between the sea anchor and the underwater sensor in order to eliminate the high defect, and it has excellent reliability.
(EN) Provided is an underwater sensor support device capable of cost reduction. [Structure] A disk-shaped sea anchor 5 is attached to a buoy 2 through a suspension cable 3 and a stretchable cable 4 having a spring property, an underwater sensor 7 is vertically hung from the sea anchor 5, and a weight 8 is attached to its lower end. The underwater sensor support device provided is characterized in that a buoyant body 6 is provided between the sea anchor 5 and the underwater sensor 7.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an underwater sensor supporting device for suspending and supporting an underwater sensor in the sea from a buoy floating on the sea surface and obtaining information such as temperature and noise in the sea.

[0002]

[Prior Art]

 A conventional underwater sensor support device will be described with reference to FIG. A buoy 2 that houses equipment such as a transmitter and a battery inside and an antenna 1 is installed on the top, a suspension cable 3 that also serves as a signal line, and an elastic cable (VIM cable) that has spring properties for the suspension cable. ) 4, a disk-shaped sea anchor 5 is attached, an underwater sensor 7 consisting of a plurality of vertically arranged sensor groups is suspended from the sea anchor 5, and the underwater sensor 7 is vertically suspended at the lower end thereof. The weight 8 is provided for this purpose.

[0003]

[Problems to be solved by the device]

 However, the above-described conventional configuration has the following two problems because it is necessary to increase the underwater weight of the weight 8 for overcoming the tide flow in the sea and suspending the underwater sensor 7 vertically. First, the suspension cable 3 is easily broken and lacks reliability. The suspension cable 3 needs to be hung vertically to eliminate the inclination caused by the flow in the sea, so attempting to increase the strength while keeping the diameter of the suspension cable 3 small has led to a cost increase. . The second drawback is that since the weight of the weight 8 in the sea is large, the extension cable 4 needs to have a linear spring characteristic without sagging or breaking even when a large force is applied. The spring constant per hit (kg / m / m) is a large value. Therefore, in order to obtain the spring constant (kg / m) required to reduce the shaking of the underwater sensor 7 due to waves or the like, the length (L) of the extension cable 4 needs to be longer. The spring constant k of the entire extension cable 4 is expressed by the following equation. k (kg / m) = kl / L kl: Spring constant per unit length (kg / m / m) L: VIM cable length (m) That is, when the spring constant per unit length becomes large, the expansion cable length becomes A constant spring constant cannot be obtained unless it is lengthened. In other words, since the extension cable is long, a large storage capacity is required and the cost is high.

This invention is disadvantageous in that the suspension cable is easily broken or the cost is high due to the heavy weight described above, and the cost is long because the length of the extension cable for reducing the sway of the underwater sensor due to waves or the like is long. An object of the present invention is to provide a submersible sensor support device which has a buoyant body between the sea anchor and the underwater sensor in order to eliminate the high defect and which is excellent in reliability and enables cost reduction.

[0005]

[Means for Solving the Problems]

 Next, means for solving the above problems will be described with reference to FIG. 1 corresponding to the embodiment. That is, the configuration of the present invention is characterized in that the buoyant body 6 is provided between the sea anchor 5 and the underwater sensor 7 in the above-described conventional configuration.

[0006]

【Example】

 An underwater sensor support device according to an embodiment of the present invention will be described with reference to FIG. A buoy 2 that houses equipment such as a transmitter and battery inside and an antenna (antenna) 1 installed on top, a suspension cable 3 that also serves as a signal line, and an extension and contraction that adds elasticity to the suspension cable. A disk-shaped sea anchor 5 is attached via a cable 4. The cable 4 is called a VIM cable (Vibration Isolation Module cable). A pressure vessel having a hollow inside or a buoyant body (float) 6 made of a lightweight material and having buoyancy is connected to the sea anchor 5 via a cable. An underwater sensor 7 composed of a plurality of vertically arranged sensor groups is suspended from the buoyant body 6, and a weight 8 for suspending the underwater sensor 7 vertically against a tidal current is provided at the lower end thereof. It is composed. In the above configuration, the buoyancy body 6 has a marginal buoyancy slightly smaller than the total value of the underwater sensor 7 and the weight 8 in the sea. The total underwater weight of the underwater sensor 7 and the weight 8 is a small value.

[0007]

[Function and effect of the device]

 Therefore, in the underwater sensor support device of the present invention, even if the weight 8 for vertically suspending the underwater sensor 7 is heavy, the buoyancy body 6 cancels the weight of the weight 8 in the sea, so that the buoyancy is increased. The tension above the body 6 has a small value, and the hanging cable 3 has no trouble such as breakage and becomes a highly reliable cable. In addition, there is also the effect of cost reduction because cables with low strength can be used. Even in the extension cable 4, since the force applied is small, there is no settling or breakage, and since the spring constant per unit length (kg / m / m) is small, it is possible for the sensor to sway due to waves. The length of the extension cable 4 for obtaining the spring constant (kg / m) necessary for the reduction may be short. Therefore, since the extension cable 4 is short, there is an advantage that the storage volume can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an underwater sensor support device according to the present invention.

FIG. 2 is a configuration diagram of an underwater sensor support device according to a conventional technique.

[Explanation of symbols]

 1 antenna 2 buoy 3 suspension cable 4 telescopic cable 5 sea anchor 6 buoyant body 7 underwater sensor 8 weight

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Kazuhiro Araki Tokyo Toranomon 1-7-12, Oki Electric Industry Co., Ltd. (72) Inventor, Takayasu, Tokyo Toranomon 1-7-12, Oki Electric Industry Co., Ltd. (72) Inventor Hiroshi Takada 1-7-12 Toranomon, Tokyo Oki Electric Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A disc-shaped sea anchor is attached to a buoy via a suspension cable and a stretchable cable having a spring property, and an underwater sensor is suspended vertically from the sea anchor,
An underwater sensor support device having a weight at its lower end, wherein a buoyant body is provided between the sea anchor and the underwater sensor.