JPH0334566B2 - - Google Patents

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, a 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. This requires skill and is troublesome to operate.

Some systems are known that use radio waves, for example, 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 fairly large radio wave oscillator 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 it were possible to use these devices, they would only be usable after the ship is berthed, the barge is lowered, the crew descends to the quay, and the transmitter is set on shore, making them extremely cumbersome to operate. It had the disadvantage of being.

The present invention was proposed in view of the above-mentioned circumstances, and its purpose is to enable crew members to hang mooring lines to quayside bits using a device that can be made simpler and more compact, without having to rely on their eyes or intuition. 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 transmitters attached to each end of a plurality of mooring lines, and means for holding each end of the mooring line at a predetermined position regardless of movement of the ship position. , a plurality of radio wave or ultrasonic wave receivers installed onboard the ship to receive the radio waves or ultrasonic waves respectively transmitted from the above transmitters, and each radio wave or ultrasonic wave transmitted from each of the above transmitters by each of these receivers. The device is characterized by comprising means for detecting the displacement of the ship from its normal position by detecting each direction of sound waves, and an arithmetic device for calculating the ship position from the displacement obtained by the means. Although it is smaller, it is also easier to operate and can automatically measure the ship's position.

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 end of the mooring line in FIG. 1.

1 and 2, 1 ₁ and 1 ₂ are the eyes made at each end of each mooring line 4, respectively, and 2
₁ and 2 ₂ are ultra-small radio wave transmitters (or ultra-small ultrasonic transmitters) attached to the bases of the eyes 1 ₁ and 1 ₂ , respectively, by embedding, etc.; 3 is a bit;
4 is a mooring line; 5 is a mooring machine; 6 ₁ and 6 ₂ are inboard receivers that are installed inside the ship and receive radio waves or ultrasonic waves transmitted from the transmitters 2 ₁ and 2 ₂ , respectively; 7 is a quay , 8 is a moored ship,
9 is a calculation device that calculates the position of the ship 8 based on the amount of displacement of the ship 8 from its normal position.

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

In FIG. 1, it is assumed that the ship 8 is moored with the eyes ₁₁ and ₁₂ hooked to the bits 3 installed on the quay 7, respectively. The ultra-small radio wave transmitters (or ultrasonic transmitters) 2 ₁ and 2 ₂ attached to the bases of Eyes _{1 1} and 1 ₂ transmit signals to Eyes 1 ₁ and 1 ₂ to Bit 3 for ship 8 to be moored. Radio waves (or ultrasonic waves) are constantly being emitted from the moment the device is applied. This radio wave (or ultrasonic wave) is received by onboard receivers 6 ₁ and 6 ₂ . Because the distance between the transmitter and receiver is short, the strength of the radio waves (or ultrasound) only needs to be weak. Moreover, for this reason, the radio wave transmitter (or ultrasonic transmitter) can be made smaller.
Each receiver 6 ₁ and 6 ₂ can detect the horizontal angles θ ₁ and θ ₂ of the direction of the radio waves (or ultrasonic waves) transmitted from the corresponding transmitters 2 ₁ and 2 ₂ , respectively, so that the fixed position of the ship 8 can be detected. By presetting _{the horizontal angles θ 1 and θ 2 at}
By detecting the amount of displacement and calculating it using the calculation device 9, the position of the ship 8 after movement can be known. In this case, in addition to the horizontal angular displacement described above, angular displacement in the vertical direction can also be measured in the same manner as above.

As described above, according to the present invention, by attaching an ultra-small radio wave or ultrasonic transmitter to the base of the eye of the mooring line, it is possible to change the normal mooring work of hooking the mooring line to a bit on the quay. It becomes possible to easily and automatically position the ship without any additional work. Furthermore, because 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, which further improves measurement accuracy. It can produce excellent effects such as increasing the

[Brief explanation of 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 end of the mooring line in FIG. 1. 1 ₁ , 1 ₂ ... eye, 2 ₁ , 2 ₂ ... radio wave (or ultrasonic) transmitter, 3 ... bit, 4 ... mooring line, 6 ₁ , 6 ₂
...inboard receiver, 7... quay, 8... ship, 9... computing device.

Claims (1)

[Claims] 1. A plurality of radio wave or ultrasonic wave transmitters attached to each terminal of a plurality of mooring lines, means for holding each terminal of the mooring line in a predetermined position regardless of the movement of the ship's position, and a plurality of radio wave or ultrasonic transmitters attached to each terminal of a plurality of mooring lines, and A plurality of radio wave or ultrasonic wave receivers installed onboard the ship to receive each of the radio waves or ultrasonic waves emitted, and each direction of each radio wave or ultrasonic wave emitted from each of the above transmitters by each of these receivers. 1. A ship position measuring device comprising means for detecting the amount of displacement of a ship from a normal position, and an arithmetic device for calculating the ship position from the amount of displacement obtained by the means.