JPH0624792Y2 - Underwater wave transmitter / receiver - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a device for controlling the pointing direction of a transducer, such as a sonar device for fish detection, which radiates ultrasonic waves into water to detect the underwater condition. is there.

[Conventional technology]

As a device of this kind, a structure in which the depression angle of the transducer is changed by a link mechanism is driven by a motor, and the amount of movement of the vertical movement axis for changing the depression angle provided in the link mechanism is detected by a potentiometer and detected by a potentiometer. Japanese Patent Application Laid-Open No. 54-66869 discloses a device in which the detected value is transmitted to the depression angle command portion to stop the motor when the desired detected value is reached.

On the other hand, in the structure for setting the depression angle in the depression angle command portion, a potentiometer similar to that in the transducer control portion is provided, and the knob of the rotary shaft of the potentiometer is manually moved to match the desired depression angle scale value. It is configured to operate.

In such a control, a configuration in which push buttons are used to drive a small constant angle is disclosed in Japanese Utility Model Application Laid-Open No. 59-46007.

Further, in the case of obtaining such an angle signal, a configuration of forming the angle signal in a non-contact manner is disclosed in Japanese Patent Laid-Open Nos. 48-83484 and 56-140271.

[Problems to be solved by the device]

Since a ship using such a device searches for an object to be detected while moving, the depression angle to the object to be detected also changes due to this movement.Therefore, the depression angle of the transducer must be changed. As the operator sways, the operator's body also sways, so the operation itself that rotates the knob slightly, for example, about 2 to 3 degrees, becomes unstable, and the target object to be detected often misses. Inconvenience occurs.

On the other hand, the potentiometer that detects the depression angle of the transducer
Since the rotating electrode for detection has a structure that frictionally slides on the surface of the resistor, in order to exert a considerable rotational force,
The mounting portion for interlocking with the depression angle of the wave transmitter / receiver is limited to the portion capable of withstanding the rotational force, which causes an inconvenience such as hindering downsizing of the structure.

In addition, since such a wave transmitter / receiver is used by being installed on a ship, the wave receiving / transmitting direction fluctuates due to pitching and rolling. It is necessary to provide a complicated structure such as a device and a correction calculation circuit for performing this correction, and there is a disadvantage that the device cannot be made simple.

Therefore, there is a problem that it is expected to provide a device that does not have such inconvenience with a simple and inexpensive device.

[Means for Solving the Problems]

This device detects the actual depression angle, that is, the actual depression angle of the transducer, which drives the mechanism that changes the depression angle of the transducer that detects ultrasonic waves by radiating ultrasonic waves into the water. And a portion for setting the depression angle to a required angle and displaying the set required angle, a signal obtained by detecting the actual depression angle, that is, a detected depression angle signal, and a signal obtained by the above setting, that is, A transmitter / receiver directional control device having a portion for driving the motor based on a set depression angle signal, wherein a portion for setting a required depression angle is pressed by a push button that decreases by a certain angle and a push button that increases by a certain angle. An angle setting means composed of a button, a digital signal generating means for generating a digital signal by operating the angle setting means, and the generated digital signal by an DA converter. AD means for converting into a log signal to obtain the set depression angle signal, and an inclinometer in which a permanent magnet is attached to a shaft that rotates based on the actual depression angle and a magnetic flux detecting Hall element is provided within the rotation range of the permanent magnet. The above-mentioned problem can be solved by installing the above-mentioned wave transmitter / receiver itself and providing actual depression angle detecting means for obtaining the above-mentioned detected depression angle signal in which pitching and rolling are corrected.

〔Example〕

 Embodiments will be described below with reference to the drawings.

The depression angle control mechanism portion of the wave transmitter / receiver will be described below.
As shown in the figure, the wave transmitter / receiver 11 is held between both ends of the U-shaped holding frame 12 so as to be rotatable around a shaft 13.
Although not shown in the figure, the transducer 11 is configured by arranging a plurality of transducers in parallel with the axis 13. A shaft cylinder 14 is inserted and attached to an intermediate portion of the holding frame 12, and a rotary shaft 15 is inserted into the shaft cylinder 14. The rotating shaft 15 can move up and down inside the barrel 14, and its lower end is rotatably connected to the link 16. Link 16 is also U
It is formed in a letter shape, and both ends thereof are rotatably attached to the side surface through which the shaft 13 of the wave transmitter / receiver 11 is shifted in the width direction and the vertical direction.

A screw 17 is cut on the peripheral surface of the upper end portion of the rotating shaft 15, and a gear 18 is threadably inserted on the screw 17. Gear 1
A gear 19 is meshed with the gear 8, and the gear 19 is connected to a rotary shaft of a depression angle control motor 21. Although not shown in the figure, this gear 18 is fixed in the upper direction, so that when the gear 18 is rotated by the motor 21 via the gear 19, the rotation shaft 15 is rotated by the screw 17 in its rotation direction. It will go up and down according to. Link 1 by this top and bottom
The wave transmitter / receiver 11 is rotated with respect to the shaft 13 via 6, that is, the depression angle in the directivity direction of the wave transmitter / receiver is controlled. Shaft cylinder 14
The gear 22 is fixed on the upper side, and the gear 22 meshes with the gear 23. The gear 23 is connected to the rotary shaft of the turning motor 24, and the gears 23 and 22 are rotated by the motor 24 to transmit / receive the wave transmitter / receiver 11. The wave beam pointing direction is rotated in a horizontal plane.

In this invention, an inclinometer 25 is attached to the wave transmitter / receiver 11, and the inclinometer 25 detects the depression angle of the wave transmitter / receiver 11 in the direction of the transmitted / received beam. The inclinometer 25 has a horizontal shaft 27 rotatably attached by, for example, a support piece 26, a weight 28 attached to one end of the shaft 27, and a permanent magnet (not shown) attached to the other end of the shaft 27. If the depression angle of the attached / receiver 11 in the direction of the transmitted / received beam changes, the weight 2
8 rotates, the permanent magnet also rotates, and a plurality of Hall elements for magnetic flux detection provided within the rotation range of the permanent magnet are provided. The rotation angle of the permanent magnet is the output of these Hall elements. Detected by. In this way, an electric signal corresponding to the depression angle of the transmitting / receiving beam in the direction of the transmitting / receiving beam is extracted.

On the other hand, as shown in FIG. 2, a depression angle setting device 31 is provided,
The depression angle setting device 31 includes, for example, buttons 31u and 31d, and when the button 31u is pressed, the depression angle decreases by a certain angle.
When the button 31d is pressed, the depression angle becomes large by a certain angle. By operating the buttons 31u and 31d, the set depression angle is output as a digital signal from the signal generator 32, and the depression angle thus set is displayed as a display although it is not shown in the figure and is converted into an analog signal by the DA converter 33. It is input to the specific axis drive circuit 34 as a set depression angle signal. Comparison drive circuit 3
A detection depression angle signal in the direction of the transmitted / received beam detected by the inclinometer 25 is also input to 3. The difference between the detected depression angle signal and the set depression angle signal is detected by the comparison drive circuit 34, and the motor 21 is driven by the difference output, and the difference between the detected depression angle signal and the set depression angle signal is controlled to be eliminated. .

With this configuration, the transducer 11 is set at the set depression angle.
It will be easily understood that the depression angle in the direction of transmission and reception of the beam is controlled. When the depression angle of the wave transmitter / receiver 11 fluctuates due to the swing of the ship, the output of the inclinometer 25 also fluctuates accordingly, and thus the set depression angle changes, and the motor 21 is driven to correct this. A ship swings by being subjected to pitching and rolling. That is, when the direction of the transmitted / received beam is in the bow direction or the stern direction, pitching changes the depression angle in the pointing direction. The depression angle of the direction changes. When the depression angle in the pointing direction changes due to these pitching and rolling,
This is detected by the inclinometer 25 and controlled so that the depression angle in the pointing direction becomes the set depression angle, that is, the variation in the depression angle in the pointing direction due to the swing of the ship is corrected.

The present invention can be applied not only to detection by a transmitting / receiving beam having a certain width in the horizontal plane as described above, but also to rotational detection of a narrow beam in a single direction in the horizontal plane.

[Effect of device]

According to this invention, as described above, the operation portion for setting the depression angle of the transducer to the required angle is reduced by a certain angle,
Or, because it is made up of larger pushbuttons,
Even when the hull is swaying, the depression angle can be increased or decreased by simply pressing this push button, so the operation can be performed reliably and reliably, and the set angle signal generated by the push button is a digital signal. Can be easily displayed on the digital display.

Since the inclinometer is attached to the transducer itself, the detected angle is the depression angle that corrects pitching and rolling.Therefore, a detector for detecting pitching and rolling, and correction for pitching and rolling. Since a correction calculation circuit for calculation is not necessary, the structure of the device is simple and inexpensive.

In addition, the detection part that detects the actual depression angle of the transducer
Since the Hall element detects the amount of rotation of the permanent magnet,
Since the rotation of the shaft to follow the depression angle change requires almost no force, it can be installed at any mounting location, for example, the back side of the transducer, making the device simple and inexpensive. There are features such as possible.

[Brief description of drawings]

The drawings show embodiments, FIG. 1 is a structural perspective view of a variable angle of depression / transmission of a transducer, and FIG. 2 is a block configuration diagram of a depression angle setting control part. 11 ... Transducer / receiver 21 ... Depression angle motor 24 ... Swing motor 25 ... Inclinometer 31 ... Depression angle setting device 32 ... Signal generator 33 ... DA converter 34 ... Depression angle driving circuit

Claims (1)

[Scope of utility model registration request] 1. A part for driving a mechanism for varying the depression angle of a transducer for radiating ultrasonic waves into the water to detect the underwater condition, and detecting the actual value of the depression angle (hereinafter referred to as the actual depression angle). And a portion for setting the depression angle to a required angle and displaying the set required angle, a signal obtained by the detection (hereinafter, referred to as a detected depression angle signal) and a signal obtained by the setting (hereinafter, a set depression angle). Signal)
A transmitting / receiving device having a portion for driving the motor based on: a. An angle setting unit that configures a portion for setting the required angle by a push button that decreases by a certain angle and a push button that increases by a certain angle; b. A digital signal generating means for generating a digital signal by operating the angle setting means; c. AD means for converting the digital signal into an analog signal by a DA converter to obtain the set depression angle signal; d. A permanent magnet was attached to a shaft that rotates based on the actual depression angle, and an inclinometer provided with a Hall element for magnetic flux detection within the rotation range of the permanent magnet was attached to the transducer itself to correct pitching and rolling. An actual depression angle detecting means for obtaining the detected depression angle signal.