JPS5831092Y2 - Transducer/receiver - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a transducer used in an underwater exploration device, particularly a sector scanning sonar.

Conventional sector scanning sonar transducers are
It has a structure in which multiple sets of transducers are arranged in a roughly semi-cylindrical shape, housed in a dome, and the dome is filled with castor oil.

Therefore, the castor oil comes into contact with the entire surface of the vibrating element forming the transducer, causing acoustic damping, and as a result, it has been difficult to increase the electrical-to-acoustic conversion efficiency.

The present invention eliminates such drawbacks, does not exhibit acoustic damping,
The objective is to obtain a transducer that has excellent electrical/acoustic conversion efficiency and is convenient to handle.

Figure 1 shows an embodiment of the structure of the transducer unit of the present invention. 1 is a ring-shaped vibrating element made of, for example, barium titanate, and 2 is a front mass, which radiates sound waves from the front surface. 3 is a mounting bracket, 4 is a "flange" made of an insulating material, 5 is a thin elastic cover made of, for example, rubber, 6 is a lead wire terminal, 7
8 is a sound insulating material, 8 is a band for tightening the rubber cover 6, and 9 is a mounting hole provided in the mounting bracket.

Here, the sound wave radiation surface side is in close contact with the rubber cover 5,
The non-radiation surface side is particularly covered with a rubber cover 5 with a sound insulating material 7 in between.

As shown in FIG. 2, the overall configuration of the transducer is such that a plurality of transducer units shown in FIG. When in use, this transducer is housed within the dome.

3 and 4 show the operating conditions, in which the transducer B is moved mechanically in any direction as shown by the arrow X, and the lever 11 is moved as shown by the arrow Y. It is the same as the conventional method that the radiation axis O of the sound waves is changed by tilting the sound wave appropriately, and the radiation direction of the sound waves is scanned by electronic means as shown by the arrow Z.

The structure of the transducer of the present invention is that, as mentioned above, each unit that makes up the transducer is individually wrapped in a rubber case, so when used in a dome, it can be used to receive and receive sound waves. Since the liquid comes into direct contact only with the radiating surface and the oil does not come into contact with other vibrating surfaces, it is advantageous in improving the electroacoustic conversion efficiency, and since each unit is independent, there are cases where partial repair or replacement is required. It is convenient for

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the structure of a transducer unit in the present invention. Fig. 2 is an explanatory diagram of a skinning sonar transducer consisting of a plurality of transducer units shown in Fig. 1; Fig. 3;
FIG. 4 is an explanatory diagram of the operation status of the above-mentioned transducer.
...Contains a ring-shaped vibrator made of titanate barium, etc., 2..Front mass, 3..Mounting bracket, 4..Insulator. "Soba", 5.
...Cover, 6 ... Lead wire extraction terminal, 7 ... Sound insulation material, 8 ... Band, 9.
...Mounting hole, 10...Mounting stand, 11...
····lever.

Claims (1)

[Scope of utility model registration request] In a plurality of unit transducers constituting a transducer of a sector scanning sonar that mechanically rotates and tilts within a dome and electronically scans the radiation direction of sound waves,
A plurality of transducer elements are arranged in a line between the ribs provided at both ends of the mounting bracket, and a sound insulating material is arranged in contact with the non-radiation surface side of the transducer elements. , and the unit is characterized in that a portion including the mounting hole provided at the end of the mounting bracket is left outside, and the entire other portion is tightly wrapped with an elastic cover to form a unit. Transducer/receiver.