JPH0426122B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ship guidance system.

When entering or leaving a port, in order for a ship to navigate within the port, it is necessary to fully understand the water depth and the topography of the seabed within the port. It is guided via a tow line 6 by a plurality of dedicated tug boards 5 in the port 3.

Therefore, the coordination between the plurality of tugboats 5 is complicated and requires a great deal of time and effort during port entry and departure, leading to an increase in costs.

Here, 1 is land and 2 is the quay.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide an economical ship guidance device that reduces costs, time, and labor when ships enter and exit ports.

To this end, the present invention provides a plurality of transmitters arranged on the seabed in a port at appropriate intervals along the ship's entry/exit taxiway, each with a slightly different frequency, and whose transmission frequency gradually increases or decreases from offshore to the quay. It is characterized by comprising a sonic oscillator, and a steering control device and a main engine control device that are installed on a ship entering and leaving a port and sequentially receive the transmitted ultrasonic waves from each of the ultrasonic oscillators and operate via a received data analysis device.

An embodiment of the present invention will be explained with reference to the drawings.
FIG. 2 is a plan view thereof, and FIG. 3 is a block diagram showing the circuit configuration of the system.

In the above figure, the same symbols as in Fig. 1 respectively indicate the same members as in the same figure, 7a, 7b...7y are a plurality of ultrasonic transmitters installed at appropriate intervals on the seabed along the sea route, and 8 is a Ground base, 9 an ultrasonic receiver, 10 a data processing device, 11 a steering control device, 12 a main engine control device, 13 a steering device, 14
is the main engine, and 9 to 14 are installed on the ship 4.

15 is an ultrasonic transmitter control device provided at the ground base 8.

In such a device, first, when the ship 4 enters or leaves the port, the ship 4 requests the ground base 8 to activate the ultrasonic transmitters 7a to 7y installed on the seabed of the port 3.

Upon receiving the request, the ground base 8 grasps the situation inside the port 3 and activates the ultrasonic transmitters 7a to 7y.
Ultrasonic waves having different frequencies are emitted from the ultrasonic transmitters 7a to 7y, and these ultrasonic waves are
As shown in the figure, the waves are received by an ultrasonic receiver 9 installed on the ship 4.

The ultrasonic waves received in this way are transmitted to the data processing device 1.
0, the positional relationship between each ultrasonic source and the ship 4 is calculated, and the steering control device 11
Then, the main engine control device 12 is activated to control the steering device 13 and the main engine 14.

In this way, the ultrasonic waves emitted by the ultrasonic transmitter 7 installed on the seabed in the port 3 can guide the ship 4 in the port 3 through the ship automatic control system equipped on the ship 4.

Here, since the frequencies of the ultrasonic transmitters 7a to 7y are normally arranged so as to gradually increase or decrease toward the quay 2, if the ship 4 moves in the direction in which the frequencies gradually increase or decrease, the frequency will naturally increase or decrease. Reached quay 2.

In addition, the procedure for leaving the port is almost the same.

According to such a device, it becomes possible to economically guide ships in a port without using a dugboat.

Note that the ultrasonic transmitter control device 15 provided at the ground base 8 in the above embodiment may be installed inside the ship 4.

In short, according to the present invention, a plurality of transmitters are installed on the seabed in a port at appropriate intervals along the ship's entry/exit taxiway, each having a slightly different frequency, and each transmitting frequency gradually increases or decreases from offshore to the quay. By being equipped with an ultrasonic oscillator, and a steering control device and a main engine control device that are installed on ships entering and leaving a port and sequentially receive the ultrasonic waves emitted by each of the above-mentioned ultrasonic oscillators and are operated via a reception data analysis device, The present invention is industrially extremely useful because it provides a ship guidance system that is economical.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a known procedure for entering and leaving a port, FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a block diagram showing the circuit configuration of the system. 1...On land, 2...Wharf, 3...Inside the port, 4...
Ship, 7a, 7b,...7y...Ultrasonic transmitter, 8
... Ground base, 9 ... Ultrasonic transmitter, 10 ... Data processing device, 11 ... Steering control device, 12 ...
Main engine control device, 13... Steering device, 14... Main engine,
15... Ultrasonic transmitter control device.

Claims (1)

[Claims] 1. A plurality of ultrasonic oscillators are installed on the seabed within a port at appropriate intervals along the ship's entry/exit taxiway, each with a slightly different frequency, and whose emission frequency gradually increases or decreases from offshore to the quay. A ship guidance system characterized by comprising a steering control device and a main engine control device that are installed on a ship leaving a port and that sequentially receive the transmitted ultrasonic waves from each of the ultrasonic oscillators and operate them via a received data analysis device.