JPS58105891A - Monitoring system for drifting of buoy - Google Patents

Abstract

PURPOSE:To enable to monitor the drifting of a buoy, by detecting the position of the buoy by using time gap coordinates calculated from data received by two loran stations. CONSTITUTION:A loran receiver 3, a telemeter transmitter-receiver 4 and the like are mounted on the buoy 1 moored on the sea. On the buoy 1, loran waves from a master station and a slave station are received to obtain the first time gap curves 12-1-12-6, while the second time gap curves 13-1-13-4 are obtained from another combination of loran waves, then the time gap coordinates of the buoy are obtained as an intersection of the first and second curves, and the coordinates are transmitted to a base station by telemeter. Then, at the base station, an allowable range of change of the time gap coordinates preset from a movable range of a mooring cable and the time gap coordinates received are compared to each other, and the drifting of the buoy is monitored.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a buoy drift monitoring method that monitors N< due to breakage of a mooring lobe by confirming the position of an unmanned observation buoy moored on the ocean.0 Conventional Observation Many buoy systems do not have a device to detect their own position, and if the buoy drifts away from the localization curve due to breakage of the mooring lobe, etc., it may become impossible to communicate or drift ashore. ...It would have been a long time since we discovered it if it hadn't been for a ship passing near 1d. It's a good idea to use a Loran receiver... □, ゛There are some that have the ability to transmit their own location, but they don't have the ability to send out acid fern.

Inventive tobacco;! 1. By eliminating these shortcomings and detecting problems as early as possible, we can prevent the loss of buoys and secondary disasters such as collisions with boats and fishing operations. We are committed to providing a full range of buoy monitoring systems with the following advantages:

Hereinafter, the present invention will be explained based on its implementation 11 with reference to the drawings.

Figure 1 shows a device to which the buoy drift monitoring method according to the present invention is applied.
(AN) receiver, 4 a telemeter transmitting/receiving device, and 6 a power source, all of which are mounted inside the buoy 1. 1-
1 is a hollow cylindrical mast installed at the center of the deck of the buoy body 1, and 1-2id is a platform installed at the top of the mast. On the outer periphery of this platform 1-2 are equipment mounting stands 1-3, 1-4 and antenna mounting stands 1-6, 1-6.
is provided. In addition, weather sensors 8 and 9 are attached to the equipment mounts 1-3 and 1-4, a Toha telemeter antenna 6 is attached to the antenna mount 1-5, and a Loran antenna 7 is attached to the antenna mount 1-6. Yes, must 1
-1 are connected to the telemeter transmitter/receiver device 4° and the Loran receiver 3 by means of feeders 10°11 passing through the interior of the telemeter transceivers 4° and 3, respectively.

Next, the operation of this embodiment will be explained. Base station (not shown)
When the telemeter transmitting/receiving device 4 is activated by the command, the weather sensors 8 and 9 are activated and collecting weather data. At the same time, the Loran receiver 3 receives the time difference I between the current position of the buoy 1 and the time difference I, and transmits the telemeter transmitting/receiving device 4. It is sent to the base station along with the weather data.

Next, time difference coordinates by the Loran receiver will be explained.

In FIGS. 2 and 3, time difference curves 12-1 to 12-6 represent the arrival time difference (2) of radio waves from the Loran main station and the slave station. Further, 13-1 to 13-4 are time difference curves (■) representing the arrival time difference I of radio waves from other Loran master stations and slave stations. The coordinates represented by the above time difference curves ■ and 1 (are called time difference coordinates. Now, if the installation point of buoy 1 is −iA, the time difference coordinates of point A, for example, from the received data of Loran receiver 3 is the time difference ■, 2227.Time difference ■ On the other hand, the buoy body 1 moves on the sea surface within the range of extension of the mooring rope 2 caused by drag forces such as wind, waves, currents, etc., but the calculated maximum movement range is represented by circle B. and,
Normally, the time difference coordinates of the buoy body 1 are within this circle B. In the event that the mooring row 12 breaks, the buoy 1 will naturally be the third
It will drift away from this circle B as shown by the arrow in the figure. Therefore, B1. which is on the circumference of this circle B. B2...
...If you observe the time difference coordinates of the time difference I and time difference of each point Bn and the time difference coordinates of the buoy itself at the 10th position i [Ai point, you can monitor the drifting of buoy 1. A simple method for 4fr2 applying this principle is to create a substantially rectangular CDEF circumscribed to circle B and connected by lines parallel to time difference curves Tl2-1 to 12-6 and time difference curves 1713-1 to 13-4, respectively. It is also possible to roughly detect the drift of buoy 1 by approximately observing whether there is a time difference coordinate of buoy 1 in the rectangle C.
If the upper side CD and lower side FE of DKF are the allowable range of time difference I, and the left and right sides OF, I)C of DKF are the allowable range of time difference II, the respective values are 2213 ~ 22/L2.46
Since it is from 07 to 462S, it is sufficient to have the time difference coordinates of buoy 1 in this range.

The base station to which such time difference coordinate information is sent directly displays the data of time difference I and time difference ■ sent from buoy 1 on the digital displays 15 and 16 of the display panel 14, as shown in FIG. Display 15
．． It is possible to visually compare and monitor the permissible range display 17 for the time difference I, which is preset and displayed at the top of each of the 16, and the permissible range display 18 for the time difference. Let them do simple addition and subtraction, and calculate the time difference of the buoys
If either or both of the time differences I exceed their respective allowable ranges, the buzzer 19 can be sounded and the alarm live 20 can also be turned on.

As explained above, according to the present invention, it is possible to relatively easily locate the buoy by detecting that the time difference coordinates indicating the position of the buoy have changed outside of a certain range using the time difference coordinates based on the data received by two sets of Loran stations. Since the position can be confirmed and buoys can be monitored to see if they are drifting, it is possible to prevent the loss of buoys, collisions with vessels due to drifting buoys, and prevention of damage to fishing facilities, which is useful in terms of equipment management and operation. There is a value in dogs.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a buoy to which the buoy drift monitoring method according to the present invention is applied, Figures 2 and 3 are diagrams showing time difference coordinates, respectively, and Figure 4 is a front view of the main part of the display panel installed at the base station. It is a diagram. 1... Buoy, 3... Loran receiver, 4
...Telemeter transmitting and receiving device, 6...Telemeter antenna. 7... Loran antenna, 12-1 to 12-6
......Time difference curve I, 13-1 to 13-4...
...Time difference curve I, 14...Display panel, 1
5.16...Digital display. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] A buoy moored on the ocean receives Loran radio waves from a main station and a slave station on the buoy to obtain a first time difference curve, and the intersection point with a second time difference curve made from another combination of Loran radio waves. The time difference coordinates of the buoy are determined as follows, and the time difference coordinates are transmitted to the base station using a telemeter.The base station receives the time difference coordinates and sets the time difference coordinates in advance from the movable range of the mooring lobe of the buoy [7. The allowable change range of the time difference coordinate and the received time difference coordinate (
A buoy drifting monitoring system characterized by monitoring whether or not the buoy has drifted by comparing it with a vote.