JPH0125435B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sonar (hereinafter referred to as "PPI sonar") that detects underwater by horizontally rotating a transducer that transmits and receives ultrasonic signals horizontally or diagonally downward. In particular, it relates to a mechanism for turning and tilting a transducer.

In conventional PPI sonar, a slip ring mechanism was installed concentrically with the rotation axis of the transducer in order to electrically connect the transducer side of the rotating system to the control display section of the stationary system. Since such a mechanism has a relatively simple configuration, it is generally used not only for PPI sonar but also as a means for electrically coupling a rotating system and a stationary system.

However, because the wave transmitting and receiving unit is located at the bottom of the ship, there are problems such as vibrations inherent in ships and electrolytic corrosion due to seawater salinity. This has a serious effect and reduces detection performance.

This invention has been made in view of the above, and includes a vibrator attached to the lower part of a bending member that can be bent in any horizontal direction, and the vibrator rotates sequentially in the bending direction without rotating (rotating) the vibrator. The object of the present invention is to provide a turning/elevating/elevating device which does not require the above-mentioned slip-ring mechanism by rotating the entire circumference.

Hereinafter, the present invention will be explained with reference to embodiments of the drawings.
The figure is a cross-sectional view of the main parts of this embodiment, and numeral 1 indicates the bottom of the ship, in which a hole 2 for arranging a wave transmitting/receiving section is bored at an appropriate position. Reference numeral 3 denotes a cylindrical or cylindrical elevating shaft, which is moved up and down by an elevating motor 6 through engagement between a rack 4 and a pinion 5 formed at a proper position above the elevating shaft. Since the rack 4 and pinion 5 are engaged with each other, the elevation shaft 3 is held so as not to rotate in the horizontal direction. Reference numeral 7 denotes a vibrator shaft with a vibrator 8 fixedly attached to its lower end, and the vibrator shaft 7 and the elevation axis 3 are connected by a bendable joint 9. The joint 9 is made of a member that can be bent in any direction perpendicular to its axis. The directional beam of the vibrator 8 is perpendicular to the radiation surface. Reference numeral 10 denotes a bearing section rotatably attached to the vibrator shaft 7.

On the other hand, reference numeral 11 denotes a turning shaft for turning the vibrator 8, which has a gear formed on its circumferential surface, and is turned in a predetermined direction by a turning motor 13 through engagement with a gear 12. Reference numeral 14 denotes a bearing that is fitted into the hole 2 and smoothes the turning of the turning shaft 11. 15 is the rotation axis 11
The bearing part 10 is connected to the bearing part 10 by a hinge attached to the lower part of the bearing part 10. 16 is a signal line for transmitting a control signal or a received signal for the vibrator 8;
7 is a through terminal for the signal line 16, and 18 is a dome.

Regarding the above configuration, the elevation and rotation operations will next be explained.

The elevating motion of the vibrator 8 is performed by moving the elevating shaft 3 up and down by the elevating motor 6. That is, by raising the elevation axis 3, the beam of the transducer 8 can be directed more vertically, and by lowering it, the beam can be directed more horizontally.

Now, the rotation of the vibrator 8 is performed by continuous rotation of the rotation shaft 11 by the rotation motor 13. When the hinge 15 attached to the pivot shaft 11 pivots integrally with the pivot shaft 11, the vibrator 8 connected thereto also pivots. This turning is performed by sequentially changing the bending direction of the joint 9 in order to fix the rotation of the elevation shaft 3. At this time, assuming that there is no bearing part 10, one rotation of the hinge 15 moves the joint 9, the vibrator shaft 7, and the vibrator 8 to the pivot shaft 11.
The joint 9 and the signal line 16 are twisted once for each turn. For this reason, the above-mentioned slip ring mechanism is eventually required, but due to the presence of the bearing section 10, the force transmitted from the transducer shaft 7 to the joint 9 due to the rotation of the hinge 15 is reduced by the force transmitted from the transducer shaft 7 at the bearing section 10. It is erased by rotation. As a result,
Although the vibrator 8 makes one turn around the vertical direction, it does not rotate. Therefore, the signal line 16 connected to the proper position of the vibrator 8 will not be twisted by the turning operation.

As described above, according to the present invention, there is no need for mechanical contact parts such as slip-ring mechanisms required in conventional devices, so that received signals, etc., can be extracted with fidelity.

In addition, a universal joint, a gimbal mechanism, etc. can also be considered as the joint 9 of the bending member.
Furthermore, by forming the vibrator shaft 7, the joint 9, and the elevation shaft 3 into an internal cylinder, the signal line 16 can be guided into the bottom of the ship through the inside of the cylinder. Furthermore,
In order to fix the rotation of the elevation axis 3, a flat rack may be used instead of the rack 4.

[Brief explanation of drawings]

The figure is a longitudinal sectional view of a main part showing an embodiment of the present invention. 3... Elevation axis, 7... Vibrator axis, 8... Vibrator, 9...
Joint, 10...Bearing part, 11...Swivel axis, 15
...Hinge, 16...Signal line.

Claims (1)

[Claims of Claims] 1. A horizontal sonar that detects underwater by horizontally rotating a transducer that transmits and receives ultrasonic signals.A horizontal sonar that detects underwater by controlling the directivity direction of the wave transmitting and receiving surface of the transducer in the horizontal or vertical direction. A water rotational elevation and elevation device, which has a cylindrical hole drilled concentrically on its central axis, and a pivot shaft that is rotatably disposed through the hole drilled in an appropriate position on the bottom of the ship; a first driving means for rotating; an elevating shaft passed through the cylindrical hole and held so as not to rotate in a horizontal direction; a second driving means for moving the elevating shaft up and down; and a second driving means connected to the lower part of the elevating shaft. a joint part that can be bent in all horizontal directions; a cylindrical transducer shaft that is connected to the lower part of the joint part and has the transducer fixed to its tip end; A swinging/heighting/heighting device for a horizontal sonar, which comprises a hinge, a bearing attached to the hinge and rotatably holding the transducer shaft, and an electric signal line connected to a proper position of the transducer and guided into the ship. .