JPS59221613A - Measuring device of ship position - Google Patents

Abstract

PURPOSE:To measure the position of a ship automatically without altering normal mooring operation by allowing a receiver mounted on the ship to detect a radio wave from a transmitter fitted to a mooring rope, and detecting the amount of displacement of the ship from a specific position. CONSTITUTION:Subminiature transmitters 21 and 22 fitted to eyes 11 and 12 transmit radio waves invariably from the point of time when the eyes are hooked to bits 3. The radio waves are received on-board receivers 61 and 62. The receivers detect horizontal angles theta1 and theta2 of the radio waves transmitted by the corresponding transmitters, so when the horizontal angles theta1 and theta2 vary, the amounts of displacement are detected and processed by an arithmetic device 9 to know the position of the ship 9 after the movement.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ship position measuring device, and more particularly to a ship position measuring device applicable to a mooring device or the like.

Normally, ships carry out cargo handling work while berthed, but due to the nature of ships, their relative position with the quay is constantly changing due to changes in tides, tides, the ship's swamp, etc. even during cargo handling operations. On the other hand, from the standpoint of cargo handling efficiency, the ship should always be in a fixed position relative to the quay.Currently, the ship's crew relies on their eyes and intuition to reel in and let out mooring lines to keep the ship in a fixed position. Since it is designed to maintain its position, it requires skill and is troublesome to operate.

Some systems are known that use radio waves to detect the ship's position, which is necessary to keep the ship's position constant, without relying on the crew's eyes, but these conventional radio-based ship position measurements Each of these devices required a radio wave transmitter, which was very expensive as a ground station, so it was not possible, for example, for ships to always carry these devices and use them no matter what port they entered. Furthermore, even if these devices could be used temporarily, they would only be usable after the ship berthed, the pattern was unloaded, the crew descended to the quay, and the transmitter was set on land. The drawback was that it was extremely troublesome.

The present invention was proposed in view of the above circumstances, and its purpose is to hook the mooring system to the bit on the quay using a device that can be made simpler and more compact, without relying on the eyes and intuition of the crew. To provide a ship position measuring device that can automatically measure the ship position from the moment the ship position is determined.

The ship position measuring device according to the present invention includes a plurality of radio wave or ultrasonic wave transmitters each attached to each terminal of a plurality of mooring systems, and a shipboard position measuring device to receive the radio waves or ultrasonic waves respectively transmitted from these transmitters. A number of radio wave or ultrasonic receivers are installed at It is characterized by being equipped with a means for detecting and a calculation device for calculating the ship's position from the amount of displacement obtained by this means. It is designed to be measurable.

An embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the terminal of the mooring system in FIG. 1.

In Figures 1 and 2, 1! and 1! are the eyes made at each terminal of each mooring system 4, 21 and 2t, respectively.
are i11 and l! respectively. 3 is a bit, 4 is a mooring system, 5 is a mooring machine, 6
, and 62 are installed in the ship, and are connected to each of the transmitters 2 and 2, respectively. 7 is a quay, 8 is a moored ship, and 9 is a calculation for calculating the position of the ship 8 based on the amount of displacement from the fixed position of the ship 8. It is a device.

The operation of the above embodiment of the present invention will be explained.

In FIG. 1, a ship 8 is attached to a bit 3 installed on a quay 7 with eyes 11 and 1. It is assumed that the vessels are moored with each of them hooked up. Each ultra-small radio wave transmitter (still an ultrasonic receiver) attached to each base of eyes 11 and 1;2. From 22 onwards, radio waves (or superordinate waves) are constantly being emitted from the time when eyes 11 and 12 are applied to bit 3 because the boat 8 is moored. This radio wave (or ultrasound)
is received by onboard receivers 61 and 62. Since the distance between the transmitting side and the receiving side is short, the strength of the radio waves (or ultrasonic waves) only needs to be weak.For this reason, the Mll wave transmitter or ultrasonic transmitter) can be made smaller. Since each of the receivers 61 and 6□ can detect the horizontal angles θI and θ2 of the direction of the radio waves (or ultrasonic waves) transmitted from the corresponding transmitters 2□ and 22, the constant (7 ft.
Horizontal angle at 6 0. By setting 0t and 0t in advance, the ship 8 will then move due to an external force such as a tidal current, and the horizontal angle θ
, and θ2 are displaced, the 7th place is detected and calculated by the arithmetic unit 9 to find out the 1σ of the ship 8 after the movement. In this case, in addition to the horizontal angular displacement described above, the vertical angular displacement can also be determined fii11 in the same manner as described above.

As described above, according to the present invention, by attaching an ultra-small radio wave or ultrasonic transmitter to the base of the mooring eye,
To easily and automatically position a ship without changing the normal mooring work of hooking a mooring system to a bit on a quay, or without any new work. Furthermore, since the distance between the transmitting side and the receiving side is short, the above-mentioned radio wave or ultrasonic transmitter and each receiver for each of these transmitters can be made small and ultra-compact, and furthermore, the measurement type can be reduced. It can produce excellent effects such as increasing the

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the terminal of the mooring system in FIG. 1. '1sZ2...Ai, 2. ．． 2. ...Radio wave (or ultrasonic) transmitter, 3...Bit, 4...Mooring system, 6
,． 6. . . . Inboard receiver, 7. Quay, 8. Ship, 9. Arithmetic device.

Claims (1)

[Claims] A plurality of radio wave or ultrasonic wave transmitters attached to each terminal of a plurality of mooring lines, and a plurality of radio wave or ultrasonic wave transmitters installed inside the ship to receive the radio waves or ultrasonic waves respectively transmitted from these transmitters. a radio wave or ultrasonic receiver, and means for detecting each direction of each radio wave or ultrasonic wave emitted from each of the transmitters by each of these receivers to detect a displacement meter from a fixed position of the ship; A ship position measuring device comprising: a calculation device for calculating the ship position from the displacement slip obtained by this means.