JP2002225790A - Far-sighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly far-sight another ship identified by an automatic ship- identifying system(AIS), and to provide a far-sighting device capable of selectively and easily far-sighting a required ship without degrading a telephoto function even from a rocking moving body. SOLUTION: An azimuth and distance to another ship identified by the AIS are obtained. On the basis of this data about the azimuth and the distance, the azimuth of an optical axis and the focus position of a telephoto camera 1 are controlled, and picked up image data are transmitted to a navigation supporting device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a far-sighted device for optically far-sighting a target such as another ship distant from a moving body such as a ship.

[0002]

2. Description of the Related Art Hitherto, a telescope having a telephoto function such as binoculars has been used to optically monitor the surroundings and a predetermined target from above a moving body such as a ship.

[0003]

However, using such a conventional hyperopic device, an automatic ship identification system (AI) can be used.
S: Universal ship-borne Automatic Identification S
ystem), when trying to hyperopia the other vessel identified
Based on the position information of the other ship displayed as a result of AIS, it is necessary to obtain the bearing and distance from the own ship, and work to accurately focus the optical axis and focus on the other ship according to the result, There is a problem that it takes time until the desired other ship is far-sighted. In particular, the longer the focal length, the higher the magnification of the hyperopic device, the narrower the field of view. Have difficulty. Also,
On a swaying ship or the like, the image in the field of view moves violently, which further increases the difficulty.

[0004] An object of the present invention is to solve the above-mentioned problems, to make it possible to surely see another ship identified by the automatic ship identification system AIS, and to reduce the telephoto function, even from a mobile body that shakes. Another object of the present invention is to provide a hyperopia device that enables a desired other vessel to be selectively hyperopia easily in a short time.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a moving object for controlling a direction of an optical axis and a focal position in accordance with data relating to an azimuth and a distance to a target to be far-sighted, thereby enlarging an optically distant image. The hyperopia means mounted on the, receiving the signal for the automatic ship identification system transmitted from other vessels, to determine the azimuth of the other vessel with respect to the moving body and the distance from the moving body, these to the farsighting means And control means for giving.

In this way, the optical axis and the focal position of the other ship are automatically controlled based on the data relating to the azimuth and the distance to the other ship to be farsighted from the moving body, and the desired other ship or the like is controlled. A distant image can be promptly optically enlarged and visually recognized.

[0007] Further, according to the present invention, the far vision means converts the image in the field of view into a signal and provides the signal to a navigation assistance device.
It is assumed that the navigation assistance device inputs the signal and displays an image. This allows you to be an AIS receiver or A
The navigation assistance device equipped with the IS receiver enables the other vessel to be far-sighted.

Further, the present invention provides means for controlling the rotation surface of the optical axis to form a horizontal plane regardless of the movement of the moving body. As a result, even if a moving body such as a ship shakes,
By canceling the influence of the shaking, a desired other ship or the like can be made far-sighted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a hyperopic device according to an embodiment of the present invention will be described in order with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a main part of a telephoto device 100 installed at a predetermined location of a ship. In FIG. 1A, 1 is C
This is a telephoto camera provided with a CD imaging unit, and is fixed on the turntable 2. As will be described later, the telephoto camera 1 controls the focus position (focusing) and the focal length (zooming) according to the control signal.
Reference numeral 3 denotes a rotation drive unit for rotating the turntable 2, and the rotation drive unit 3 is fixed to a support 4. Reference numeral 5 denotes an installation base fixed at a predetermined position on the ship. 6a, 6
Reference numeral b denotes an actuator that movably supports the support base 4 with respect to the installation base 5. These actuators 6
a, 6b and the like expand and contract in accordance with the motion of the ship,
Is always used to form a horizontal plane.

FIG. 1B shows a structure provided inside the rotary drive unit 3 shown in FIG. 1A, wherein 7 is a rotary shaft of the turntable 2 and 8 is fixed to the rotary shaft 7. It is a slit plate. A slit g is provided at a predetermined position on the slit plate 8.
Is provided. Reference numeral 9 denotes a photo interrupter for detecting the slit g. In a state where the slit g of the slit plate 8 is detected by the photo interrupter 9, the telephoto camera 1 is fixed to the turntable 2 so that the telephoto camera 1 faces the bow direction. For this purpose, the turntable 2 is provided with a mounting portion so that the mounting direction of the telephoto camera 1 can be determined in advance. As will be described later, the home position of the telephoto camera 1 is detected based on the signal of the photointerrupter 9, and the optical axis of the telephoto camera 1 is directed in a predetermined direction by controlling the pulse number of a stepping motor that drives the turntable 2 to rotate.

FIG. 2 is a display example of a display screen of the navigation assistance device connected to the telephoto device 100 shown in FIG. 1 via a cable. This navigation assistance device includes a receiver and a radar of the automatic ship identification system AIS, displays the position of another ship recognized by the AIS on a radar screen, and displays a telephoto image of the other ship.

In FIG. 1A, vertical and horizontal straight lines are a latitude line and a longitude line, and S is a ship mark indicating the position of the ship on a chart shown by the latitude line and the longitude line. Also H
M is a heading line mark indicating the heading of the ship. R
a is an image of a radar echo of the target. TP is AI
This mark indicates the position of another ship recognized by S. Further, CC is a cross cursor.

In a state where the position of the other ship is recognized,
If a key operation for farsighting the other ship is performed, a straight line extending from the own ship position to the other ship position is displayed as shown in FIG. 2B, and a farsighted image indicated by V is displayed on a part of the display screen. Is displayed.

If the cross cursor CC is superimposed on the position of the radar echo Ra of the target to be hyperopic and a key operation for instructing hyperopia is performed, a hyperopic image is displayed on a part of the display screen in the same manner. Is done.

FIG. 3 is a block diagram showing the configuration of the entire hyperopia. In FIG. 3, the telephoto device 100 has a configuration as shown in FIG. The GPS receiver 11 receives radio waves from a plurality of GPS satellites via the GPS antenna 10,
Find the position and speed of the receiving point. The radar device 13
The surroundings are detected by the radar antenna 12. AIS
The receiver 15 receives the radio wave transmitted from the AIS transmitter of the other ship by the antenna 14, and decodes the identification data of the other ship.

The vertical gyro 16 detects the motion of the ship (pitching angle and rolling angle). The gyro compass 17 detects the heading of the ship. The keyboard 18 is a key input device including an operation unit for instructing hyperopia, which will be described later. Pointing device 19
Is a trackball, for example, which is used to move the position of the cross cursor CC shown in FIG. 2 and to indicate a predetermined position.

The signal processing device 28 inputs and outputs data to and from the various input / output devices via the interfaces 20 to 27, respectively. That is, the current position of the own ship is read from the GPS receiver 11, the display position of the own ship mark S is calculated as shown in FIG. 2, and the display data of the own ship mark is stored in the display memory in the display control circuit 29. Write to. Further, the image data of the radar echo is read from the radar device 13, processed into display data, and written into the display memory of the display control circuit 29. Also, AIS
The display control circuit 2 according to the position data of the other ship among the identification data of the other ship decoded from the signal received by the receiver.
The mark indicating the position of the other ship is written in the display memory at 9. In addition, it reads the operations of the keyboard 18 and the pointing device 19 and performs processing according to those input operations. Further, it reads data from the vertical gyro 16 and the gyro compass 17 and outputs predetermined control data to the telephoto device 100.

The display control circuit 29 reads out the contents written in the display memory, generates a display signal, and supplies the display signal to the display 30. Thus, the display 30 performs the display as shown in FIG.

FIG. 4 is a block diagram showing a configuration of a control unit in the telephoto device 100. In FIG.
The D imaging unit 32 is an imaging unit inside the telephoto camera 1 shown in FIG. The lens system 33 is a lens of the telephoto camera 1 and a driving part thereof, and controls a focal position and a focal length. The drive circuit 35 drives the stepping motor 36,
The turntable control circuit 34 receives a signal from the home position sensor 9, detects the home position of the turntable 2 shown in FIG. 1, and sends a drive pulse to the drive circuit 35 in accordance with the given angle information. , The stepping motor 36 is rotated, and the turntable 2 is rotated by a predetermined angle. Driving circuits 37, 3
Reference numeral 9 drives the pitch corresponding actuator 6a and the roll corresponding actuator 6b shown in FIG.

The data communication control circuit 31 shown in FIG. 4 receives the control data from the navigation aid and
3. By controlling the stepping motor 36, the pitch corresponding actuator 6a, and the roll corresponding actuator 6b, respectively, the support table 4 shown in FIG. 1 is directed to a horizontal plane, and the optical axis of the telephoto camera 1 is directed to a predetermined direction. The position is set to a predetermined state. Further, the data communication control circuit 31 sends the image data from the CCD imaging section 32 to the navigation assistance device in a predetermined data format.

It should be noted that the image data obtained by imaging may be separated from the cable for transmitting the above-mentioned various control data, and may be transmitted as an analog video signal.

FIG. 5 shows the AIS mounted on the other ship.
FIG. 3 is a block diagram illustrating a configuration of a transceiver. In FIG. 5, 40 is a GPS antenna, 41 is a GPS receiver, and the GPS receiver 41 receives radio waves from a plurality of GPS satellites and measures the position of a receiving point. The processor 46 reads the positioning result via the interface 42. Further, the processor 46 outputs the data for vessel identification to the interface 45 in a predetermined format. The transceiver 44 transmits the ship identification signal from the antenna 43.

Next, the main processing contents of the signal processing device 28 shown in FIG. 3 are shown as flowcharts in FIGS. FIG. 6 shows various types of information input and processing procedures based thereon. As shown in FIG. 6, for the reception of AIS, the received data is read at a predetermined cycle or at a timing when the AIS receiver receives new data.

When the operation of the pointing device is performed, the display position of the cross cursor is updated according to the operation amount.

When a key operation for instructing hyperopia is performed, hyperopia control described later is performed. When the zoom key is operated, the zoom control data is transmitted to the telephoto device 100. Specifically, when the (tele) key for changing the focal length to a longer one is operated, the control data FD of the current focal length is incremented by one. Then, the new control data FD is transmitted to the telephoto device 100.
However, when the FD has reached the maximum value max, the FD
Is not changed. Conversely, if the (wide) key for changing the focal length to be shorter is operated, the control data FD of the current focal length is decremented by one. And
The new control data FD is transmitted to the telephoto device 100. However, when the FD has reached the minimum value min,
The FD is not changed. The other keys are also processed according to each key.

On the telephoto device side receiving the focal length control data FD, the lens system 33 shown in FIG. 4 performs focal length control according to the data.

FIG. 7 shows a processing procedure of the above-mentioned hyperopia control.
First, the position of another ship or other target to be farsighted (latitude La
tp and longitude Lon-p), the position (latitude Lat-s, longitude Lon-s) of the own ship and the information BEA-s of the heading of the own ship, and subsequently, these information , The distance r and the relative azimuth θ to another ship or the target are obtained. The distance r and the relative orientation θ are as shown in FIG. Subsequently, control data of the focal position of the telephoto camera is generated from the information on the distance r, and the control data and the relative azimuth data θ are transmitted to the telephoto device.

With the control of the lens system 33 and the stepping motor 36 shown in FIG. 4, the optical axis of the telephoto camera points in the direction of another ship or other target to be far-sighted, and the focus is on the distance. Together, the hyperopic image V as shown in FIG. 2B is displayed.

FIG. 8 shows the processing contents for the motion of the own ship. First, the pitch angle, the roll angle and the respective angular accelerations of the own ship are detected, and accordingly, the support table 4 shown in FIG.
Generates data for controlling the pitch corresponding actuator and the roll corresponding actuator so that the actuator always forms a horizontal plane. Then, the control data is transmitted to the telephoto device. Thereby, the pitch corresponding actuator 6a and the roll corresponding actuator 6b shown in FIG. 4 are driven, and the support table 4 and the turntable 2 shown in FIG. 1 always form a horizontal plane.

In the above-described example, the state to be far-sighted is manually designated, but this designation may be automated. For example, by specifying the other ship identified by the AIS as the other ship to be tracked first, the other ship being tracked may be far-sighted. That is, based on the position information (relative azimuth and distance to the own ship) of the other ship being tracked, control data for hyperopia of the position is generated,
It may be transmitted to the telephoto device at a predetermined time period.

[0031]

According to the present invention, the control of the optical axis and the focus position to another ship identified by the AIS is automatically performed,
In addition, the image of the ship can be quickly optically enlarged and viewed.

Further, according to the present invention, an image in the field of view is converted into a signal and supplied to the navigation assistance device, so that the navigation assistance is an AIS receiver or a navigation assistance device provided with the AIS receiver. The desired other ship can be easily and quickly made far-sighted on the device side.

Further, according to the present invention, even if a moving body such as a ship is shaken, the rotation surface of the optical axis is controlled to always form a horizontal plane regardless of the shaking of the moving body. The effect is negated and the desired other vessel becomes hyperopic.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a configuration of a telephoto device and a perspective view of a part thereof.

FIG. 2 is a diagram showing a display example of a display screen of the navigation assistance device.

FIG. 3 is a block diagram showing the configuration of the entire hyperopia;

FIG. 4 is a block diagram showing a configuration of a control unit of the telephoto device.

FIG. 5 is a block diagram showing a configuration of an AIS transceiver mounted on another ship.

FIG. 6 is a flowchart showing processing contents of a signal processing device in the navigation assistance device.

FIG. 7 is a flowchart showing processing contents of a signal processing device in the navigation assistance device.

FIG. 8 is a flowchart showing processing contents of a signal processing device in the navigation assistance device.

[Explanation of symbols]

 1-Telephoto camera 2-Turntable 3-Rotation drive unit 4-Support table 5-Installation table 6-Actuator 7-Rotating shaft 8-Slit plate 9-Photo interrupter g-Slit 100-Telephoto device S-Own ship mark HM- Heading line mark Ra-Radar echo CC-Cross cursor WP-Destination mark V-Far vision image

Claims (3)

[Claims] 1. A hyperopia means mounted on a moving body, which controls an optical axis direction and a focal position according to data on an azimuth and a distance to a target to be hyperopia, and enlarges an optically distant image. Control means for receiving a signal for an automatic ship identification system transmitted from another ship, obtaining an azimuth of the other ship with respect to the moving body and a distance from the moving body, and providing these to the hyperopia means. . 2. The hyperopia apparatus according to claim 1, wherein said hyperopia means converts an image in a visual field into a signal and provides the signal to a navigation assistance apparatus, and the navigation assistance apparatus inputs the signal and displays an image. 3. The hyperopia apparatus according to claim 1, further comprising means for controlling a rotation plane of the optical axis to form a horizontal plane regardless of the movement of the moving body.