JPS61246685A - Video apparatus for catching clashing object - Google Patents

Abstract

PURPOSE:To save labor without requiring artificial monitor using naked eyes or binoculars, by providing a TV camera and a CRT display which automatically tracks an object detected by a radar to take pictures and display it. CONSTITUTION:As a target object enters a guard ring area of a radar 2, the radar 2 detects it and an arithmetic section 3 computes the azimuth, distance and the like to be inputted into computation/control unit 12, which computes the azimuth of the target object to the course of the own ship and the relative speed between the own ship and the target object based on the input data and sends control signals (e) and (f) to a camera set platform driver 6 and a focal length adjuster 7. The unit 6 adjusts the attitude of a camera 4 through a camera set platform 5 to ensure that the TV camera 4 swayed on waves automatically tracks a moving target object. The unit 7 maintains the focal length of a camera's zoom lens optimal in response to changes in the distance between the own ship and the target object to project the image 17 of the target object on a CRT display 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a colliding object capturing and imaging device that can automatically monitor targets that are likely to collide with one's own ship.

[Prior art] In order to prevent ship collisions at sea, a collision prevention assist system (hereinafter referred to as ARPA) that uses radar is called IM.
It is internationally regulated by O, and is installed on ships with a gross tonnage of io, ooo tons or more.

As shown in Figure 3, ARPA displays a target object such as a ship captured using radar as a bright spot within a guard ring area a, and also calculates the distance r between the target object and own ship's position lIC.
Azimuth angle θ (angle from true north N) of one target, expected distance of closest approach (CPA), predicted time until closest approach (CP
The target object's moving speed and course (velocity vector D) are calculated moment by moment and displayed numerically.

[Problem to be solved by the invention] However, according to the above-mentioned ARPA, the position of the target (r, θ)
, the velocity vector D is displayed as a bright spot on the coordinate plane with the vertex of the radar screen as true north, so it is possible to grasp the size of the target, the front of the target, for example, the direction in which the bow is pointing, etc. First, it is necessary for the captain or navigator to constantly monitor the movement of the target using the naked eye or binoculars, and monitoring work is difficult and complicated, especially at night, and there has been a strong desire for improved monitoring methods.

[Means for Solving the Problems 1] The present invention has been made to solve the above-mentioned problems, and detects objects on the ocean using radar and detects the relative positions of the objects and own ship over time. a collision prevention assisting device that calculates and predicts changing situations; a television camera that automatically tracks and detects objects detected by the radar; and a CRT display that displays images captured by the television camera. It is.

[Operation] The target detected by the radar is automatically tracked using a TV camera, and the image of the captured target is displayed in the cockpit, etc., so it is not possible to manually track the target using the naked eye or binoculars as in the past. This eliminates the need for continuous monitoring, resulting in labor savings.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention,
1 is the hull of own ship, 2 is a radar that constitutes a part of the collision prevention assistance system (ARPA) according to IMO standards, and 3 is the same (a calculation unit, and this device
A high-sensitivity television camera 4 that captures images, this television camera 4
A camera installation stand 5 that changes the attitude of the camera so that it captures the target object, and a Vt [6] that rotates the camera installation stand 5 in a predetermined direction in response to changes in the distance between the target object and own ship. Device 1 for adjusting the focal length of a TV camera/zoom lens
7. Enter the ARPA detection data (r, θ) (see Figure 3) and the measured values from the speed log 8, gyro compass 9, hull inclination meter 10, etc. installed on your own ship to determine your ship's position and target. a calculation/control bag fi12 that calculates the relative azimuth angles in the up, down, left and right directions between the two, as well as the relative speed between the two, and issues signals for controlling the camera mount drive device 16 and the focal length adjustment device H7; It consists of a CRT display 13 that displays images captured by the camera 4, and the TV camera 4 is located at a high place in the bow section 14, and the CR
The T-display 13 is arranged inside the cockpit 15.

Next, the operation of this device will be explained. When the target enters the guard ring area a of the radar 2 (see Figure 3), the radar 2 detects the target and the ARPA calculation unit 3 calculates the azimuth θ,
Distance r between own ship and target, predicted closest approach distance CPA,
Calculate the predicted CPA time sphere, velocity vector F, etc.
These calculated values are input to the calculation/control bag @12 via the interface 16. The arithmetic/control device 12 uses the input data, a speed log 8, and a gyro compass 9.
, based on input data from the hull inclinometer 10, etc., calculates the vertical and horizontal azimuth angles of the target with respect to the own ship's course, and the relative speed between the own ship and the target, and calculates the camera installation platform driving device lb and focal length. A control signal eJ is sent to each adjusting device @1, and the camera mount drive device 6 controls the TV camera 4 via the camera mount 5 so that the TV camera 4, which is constantly shaken by waves, automatically tracks the moving target. In addition, the focal length adjustment device 1 maintains the focal length of the television camera/zoom lens in the optimum state in response to changes in the distance between the own ship and the target object, and adjusts the attitude of the target object 117 to the CRT display. 13, and data detected and calculated by ARPA (target azimuth θ, target distance tllr, speed vector F, predicted CPA, CPA time, course, etc.)
is displayed in numbers on part 18 of the screen.

Additionally, an infrared camera may be used as the television camera, in which case nighttime monitoring becomes easier.

It should be noted that the present invention is not limited only to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, the present invention exhibits the following excellent effects.

θ) In addition to the conventional Collision Prevention Assistance System (ARPA), it is now possible to monitor targets using a television camera, eliminating the need for manual monitoring using the naked eye or binoculars as in the past. In addition to the ARPA function, all preventive functions can be automated, resulting in labor savings.

■ By adopting an infrared television camera, nighttime monitoring becomes easier and more reliable, and the safety of ship navigation can be improved.

(To) Since many ships are already equipped with ARPA, this device can be configured by simply adding a television camera, display device, etc., and has a wide range of applications.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 show an embodiment of the present invention, Fig. 1 is a prolock diagram showing the configuration of this device, Fig. 2 is a side view of the hull showing the outline of the equipment arrangement, and Fig. 3 is a radar FIG. In the figure, 2 is a radar, 3 is a calculation unit, 4 is a television camera, 1
2 is an arithmetic/control device, and 13 is a CRT display. 1. Ward C Tsuran

Claims (1)

[Claims] 1) A collision prevention support system that detects objects on the ocean using radar and calculates and predicts changes over time in the relative position between the object and the own ship; and a collision prevention support system that automatically tracks objects detected by the radar. A colliding object capturing and imaging device comprising: a television camera that captures an image; and a CRT display that displays an image captured by the television camera.