JPH0741339Y2 - Radio buoy - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a radio buoy used in fisheries.

[Prior Art] A radio buoy attached to a fishing net, longline, etc. and used for reporting the location of the net, periodically emits radio waves, or adds a selective calling device to respond to a calling radio wave from a fishing boat. Either a radio wave is emitted or either method is taken.

[Problems to be solved by the invention] As described above, in the conventional radio buoy, only the location of the radio buoy is reported. Therefore, although the laying condition of the rope or net can be known, the information about the catch is transmitted. I couldn't do that. For this reason, in the tuna longline fishing in which dozens of hemp ropes are flown, there is a problem that the line with the tuna cannot be pulled up preferentially, and the prey of the corner is preyed on by the sea bream or the shark, and it cannot be collected in a fresh condition. .

[Means for Solving the Problem] The present invention has been made to solve such a problem. A tuna caught on a fishing hook always pulls the rope deep into the water, and a radio buoy attached to the rope is used. Equipped with a pressure switch, the opening and closing of the switch controls the emission of radio waves to provide information on the presence or absence of catch.

[Operation] According to the radio buoy of the present invention, the presence or absence of a prey can be determined by the condition of the radio waves emitted.

[Embodiment] Next, an embodiment in which the present invention is applied to a radio buoy with a selective calling device will be described with reference to the drawings.

FIG. 1 is a diagram of a radio buoy according to the present invention, in which (1) is a pressure switch mounted on the bottom of the radio buoy housing. FIG. 2 is a system diagram for explaining the operation.

First, the operation before the buoy is pulled into the water by the tuna will be described with reference to FIG. (2) is an antenna for transmitting and receiving a radio buoy with a selective calling device, which is connected to the selective calling device (3) having a receiving function when in the call waiting state, so that the fishing boat emits a calling radio wave. Then, the selective calling device (3) decodes the firing code and sends an activation signal to the code generator (4). The transmitter (5) receives the local code and the time signal from the code generator (4), switches the antenna (2) to the transmitting side, and emits the radio wave modulated by the local code according to the time signal.
In this way, the radio buoy with selective calling device emits the response radio wave a predetermined number of times only by the calling radio wave, and then returns to the standby state.

Next, the operation of the pressure switch of the present invention will be described. When the buoy is pulled into the water by the tuna, the pressure switch (1) operates and shifts the state of the holding circuit (7). Since this transposition signal is logically ORed with the activation signal from the selective calling device (3) by the logical sum circuit (6), the code generator (4) is activated and a radio wave is emitted. Holding circuit (7)
The radio wave is continuously emitted because the buoy keeps the dislocated state even when the buoy re-floats and the pressure switch (1) is opened.

This continuous emission is repeated with a cycle determined by the timed signal, for example, 1 minute transmission and 3 minutes stop, so that the calling radio wave can be received during the stop period.

Since the activation signal obtained by receiving the calling radio wave is also connected to the reset terminal of the holding circuit (7), the holding circuit (7) is returned to the initial state, the continuous emission is stopped, and the normal calling is performed. Put it in a standby state.

[Effect of the device] As described above, when the buoy is pulled into the water by the tuna, radio waves are continuously emitted. By receiving the radio waves, it is detected that the prey was caught on the fishing boat at a remote sea. You can do it. As a result, the trunk can be pulled up from the trunk attached to the buoy, which not only reduces the damage caused by the sea bream and the shark, but also enables the fish to be collected fresh.

[Brief description of drawings]

FIG. 1 is an external view of a radio buoy according to the present invention, and FIG. 2 is an operation system diagram. In the figure, (1) is a pressure switch,
(2) is an antenna, (3) selective calling device, (4) is a code generator, (5) is a transmitter, (6) OR circuit, and (7) is a holding circuit.

Claims (1)

[Scope of utility model registration request] 1. A radio buoy provided with a pressure switch for controlling the emission of radio waves by opening and closing the pressure switch.