JPH0425671Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention uses an ultrasonic transducer for underwater detection to monitor,
More specifically, the present invention relates to an ultrasonic transducer for underwater detection that can easily detect objects such as schools of fish and underwater obstacles in remote waters within a certain radius around a certain point.

[Conventional technology]

Conventionally, fish finders that detect objects such as schools of fish and underwater obstacles are generally known, for example, by fixing a transducer element to the bottom of a ship and detecting schools of fish below the bottom of the ship. A known example of a device used is a portable vibrator that is lowered into the water from the side of the ship to detect schools of fish around the hull.

[Problems with conventional technology]

However, with a structure in which the transducer is fixed to the bottom of the ship, it is only possible to detect the situation directly below the bottom of the ship, and in order to detect the situation on the bottom of the ship in a wide range, the ship itself must be moved carefully, making detection only a hassle. However, it had the disadvantage that it could not be used in shallow waters along the coast because there was a risk of running aground.

On the other hand, if the transducer is movable, the transducer can be moved by holding it along the side of the ship, for example, so the inconvenience of having to move the boat around frequently can be alleviated to some extent. Detection is limited to areas along the sides of objects, and the problem of not being able to detect in shallow waters still remains unresolved.

In order to solve this problem, it may be possible to connect the vibrator to the end of a long cable, attach a "float" and throw it into the distance, but since the cable has its own weight, the base end of the cable and the "float" During this period, the cable sagged into the water due to its own weight, and this sagging caused the float to gradually approach the base of the cable, making fixed-point observation impossible.

[Problems solved by invention]

In view of the above-mentioned problems, this invention was developed using ultrasonic waves for underwater detection, which can perform fixed-point observation even on the surface of the sea remotely, and can safely and easily detect underwater objects from a ship or shore even in shallow sea areas. It was created for the purpose of providing a transducer.

[Technology to solve problems]

That is, in the ultrasonic transducer for underwater detection of this invention, a transducer element integrated with a weight is connected to the tip of a buoyancy cable, and a transducer element integrated with a weight is connected to the base end of the buoyancy cable.
A transmitting/receiving device and a display device are connected thereto, and a float capable of withstanding the gravity of the vibrator element is movably fixed to the intermediate portion of the buoyancy cable.

〔Example〕

Next, this invention will be explained using examples.

FIG. 1 is a side view of an embodiment of this invention, and FIG. 2 is a perspective view of essential parts of the embodiment.

In the ultrasonic transducer 1 for underwater detection of this invention, a vibrator 4 integrated with a weight 3 is connected to a tip 2A of a buoyancy cable 2, and a base end 2B of the buoyancy cable 2.
A transmitting/receiving device and a display device 5 are connected to the buoyant cable 2, and a float 6 that can withstand the gravity of the vibrator is movably fixed to the middle portion of the buoyancy cable 2.

In the above embodiment, the weight 3 attached to the vibrator 4 is preferably elongated.

Further, as shown in Fig. 2, the float 6 is made of closed-cell foam or the like, and has a shape in which a cable insertion hole 6A and a small diameter hole 6C are integrally bored through the split 6B. The cable 2 is configured to be fixed integrally with the cable 2.

[Effect]

In this invention, first, the depth of the transducer element 4 from the water surface is adjusted by the position of the float 6, the float 6 is fixed to the buoyancy cable 2, and then the length L between the float 6 and the base end 2B of the buoyancy cable is The missile is deployed in a radius that covers the desired sea area, and then released further away.

Length L between the buoyancy cable base end 2B and the float 6
is set in advance, so within the range of radius L, the buoyancy cable 2 floats on the water surface in a taut state, and at the same time, the vibrator element 4 is suspended directly below the float 6.

At this time, since the buoyancy cable 2 itself floats on the water surface, it does not sag due to its own weight.

Therefore, the transducer element 4 can maintain a constant remote position and detect the underwater situation at this position.

〔effect〕

This idea is structured as above, so
It becomes possible to detect underwater information within the range of the length L of the buoyancy cable, and for example, in shallow sea areas, it is possible to detect it from a boat parked around the area or by throwing it from the shore. It has practical effects such as

Further, the ultrasonic transducer for underwater detection of this invention has practical effects such as being easily usable for detecting schools of fish, detecting divers in marine recreation areas, measuring sediments in dams, etc., and having a wide range of uses.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of this invention, and FIG. 2 is a perspective view of essential parts of the embodiment.

Claims (1)

[Scope of utility model registration request] A vibrator element integrated with a weight is connected to the tip of the buoyancy cable, a transmitter/receiver and a display device are connected to the base end of the buoyancy cable, and the vibration element is connected to the middle part of the buoyancy cable. An ultrasonic transducer for underwater detection, characterized in that a float capable of withstanding the gravity of an element is movably fixed.