JP2757366B2 - Underwater data observation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an underwater data observation device for observing underwater temperature, seafloor earthquakes, etc., and more particularly, to only underwater observation data that has changed from the initially stored underwater observation data. The present invention relates to an underwater data observation device that additionally stores data and transmits the stored data when receiving an information transmission command by an ultrasonic wave or the like from an observation ship or the like.

[Conventional technology]

Conventionally, this type of underwater data observation device has been used to periodically pull out the observation device, collect the magnetic tape, etc. of the storage medium in the internal storage device, set a new storage medium, such as a magnetic tape, in the storage device, and perform measurement. The method of re-installing the device in water was used. In addition, when the cable depth was relatively shallow and it was possible to lay cables to land, cables were laid to land and the seafloor observation data was transmitted to land via cables.

Furthermore, the underwater observation data is stored in the storage device in the underwater data observation device, and the surveillance ship periodically goes to the sea area where the underwater data observation device is installed. The method of sending memorized information was adopted.

[Problems to be solved by the invention]

In the above-mentioned conventional underwater observation device, in the case of a method in which the underwater observation device is installed on the sea floor and collected periodically, the trouble of collecting and re-installing the underwater observation device from the sea floor at intervals of, for example, every one month or three months is eliminated. There is also a drawback that a recovery mechanism is required. On the other hand, in the case of the method of laying cables to land, it is necessary to constantly monitor the cables so that they will not be caught by fishing nets and damaged.
If an accident such as breakage of a cable occurs, there is a disadvantage that an enormous cost of cable laying work is required again.

Also, when all the underwater observation data is stored in the underwater data observation device, if the amount of information is large and the patrol boat comes to read the underwater observation data at a long patrol interval,
A large-capacity storage device is required to store the underwater observation data during that time, and a large-capacity battery is required as a power source for transmission to send this large-capacity underwater observation data to the surveillance ship. There was a disadvantage of becoming.

[Means for solving the problem]

An underwater data observation device of the present invention is an underwater sensor that is installed in the water to observe the state of the underwater and outputs underwater observation data,
A storage device that stores the underwater observation data observed by the underwater sensor, a clock device that generates a trigger signal for causing the underwater sensor to observe the state of the underwater and supplies the trigger signal to the underwater sensor, and the underwater observation data A receiving device that receives a command signal for transmitting an external monitoring device through the water from the external monitoring device, and the underwater observation data from the storage device that is read based on the command signal from the receiving device. And a transmission device for transmitting to the external monitoring device through the water together with the time information from the clock device, and comparing the latest observation data of the underwater observation data stored in the storage device with the previous observation data to obtain the latest When the difference between the observation data and the previous observation data is within a predetermined threshold, the latest observation data is stored in the storage device. A comparator device and for controlling the storage device so as not to 憶.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a basic configuration of the underwater data observation device.

First, an underwater data observation device 101 having an underwater sensor 1 such as a water temperature measurement sensor or an ocean bottom seismometer is installed on the sea floor to be observed. When receiving a trigger signal from the clock device 2, the underwater sensor 1 outputs observation data. This output signal is sent to the storage device 3 together with the time signal of the clock device 2, where it is stored as analog information or converted into a digital signal.

In order to collect the stored information of the underwater data observation device 101, a ship periodically arrives in the sea area where the underwater data observation device 101 is installed. A command signal for information transmission is transmitted from the ship to the sea by ultrasonic waves or the like. This command signal is received by the receiving device 11 including the wave receiver 5 and the command receiver 6. The command signal is first received by the receiver 5 and converted into an electric signal. This electric signal is sent to the command receiver 6, and when it is determined that the signal is amplified and transmitted as a command signal for transmitting observation data, the stored data is read from the storage device 3. The read signal is transmitted to the transmitter 7
Is transmitted to the transmission device 12 comprising the transmitter 8. Transmission device 12
Then, the power is amplified by the transmitter 7, converted into an ultrasonic signal by the transmitter 8, radiated into the water, and transmitted to a ship on the water. Note that the time signal of the clock device 2 is also sent to the transmitter 7 together with the stored information, and the time information at the time of data transmission is sent from the transmission device 12 to the ship on the water together with the observation data.

FIG. 2 is an explanatory diagram showing the operation status of the underwater data observation device according to the present invention.

The underwater data observation device 101 according to the present invention is installed on the seabed 102 to be observed, data is collected periodically, and stored in the storage device 3 in the underwater data observation device 101. The ship 103 travels to the sea area where the underwater data observation device 101 is installed, for example, at a rate of about once a week or once a month (in the case of observations in the ocean far from land, this interval is once a year. Or about two times.) There ship
From 103, a command signal for transmitting the information stored in the underwater data observation device 101 is transmitted by ultrasonic waves or the like. This command signal is received by the receiving device 11 of the underwater data observation device 101, and the information stored in the storage device 3 in the underwater data observation device 101 is transmitted from the transmission device 12 of the observation device 101 to the ship 103 by ultrasonic waves or the like. Can be The ship 103 receives this data and reads the constantly changing underwater observation data.

FIG. 3 is a block diagram showing an embodiment of the underwater data observation device according to the present invention, in which a comparison device 4 is connected to the storage device 3 of the block diagram in FIG. The comparison device 4 compares the previous observation data stored in the storage device 3 with new observation data. In this comparison device 4, a threshold value is set in advance to determine data coincidence, and data within this threshold value is determined to be the same as previous data. If it is determined that they are the same, a command code indicating that the data is the same as the previous data is stored as new storage information in the storage device 3, and at the time of transmission, transmission of observation data is performed for a part of the command code. Activate the transmitter 7 so that it does not. The reading device on the boat reproduces the previous data for the portion receiving the command code indicating the same information. As a result, the number of data stored in the storage device 3 is reduced, and there is a possibility that the cruising interval of the ship is extended, and if the cruising interval of the ship is almost the same as in the first embodiment, the transmission time can be reduced. As a result, power consumption can be reduced.

〔The invention's effect〕

As described above, according to the present invention, the observation device is installed on the sea floor and stored in a storage device having a smaller storage capacity than when all the underwater observation data is stored, so that the observation device can be taken out of the ship at sea at any time. Observation information of underwater data is obtained regularly even if the ship observing is not in the vicinity of the observation object, and only the latest observation information different from the previous storage contents is stored, so the surveillance ship Underwater observation information can be collected in a short time, and the transmission power energy of the underwater data observation device can be reduced.

This effect is particularly noticeable when the observation area is on the ocean far from the land where the number of ship round trips increases, because it is difficult for the ship to constantly engage in observation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of an underwater data observation device of the present invention, FIG.
FIG. 3 is a block diagram showing an embodiment of the underwater data observation apparatus according to the present invention. 1 ... underwater sensor, 2 ... clock device, 3 ... storage device,
4 ... Comparing device, 5 ... Receiver, 6 ... Command receiver, 7
... A transmitter, 8 a transmitter, 11 a receiver, 12 a transmitter.

Claims (1)

(57) [Claims] An underwater sensor that is installed in water to observe the state of the underwater and outputs underwater observation data; a storage device that stores the underwater observation data observed by the underwater sensor; A clock device that generates a trigger signal for observing the situation and supplies the trigger signal to the underwater sensor,
A receiving device that receives a command signal for transmitting the underwater observation data to an external monitoring device through the water from the external monitoring device, and from the storage device that is read based on the command signal from the receiving device. A transmitting device that transmits the underwater observation data together with the time information from the clock device to the external monitoring device through the water, and compares the latest observation data of the underwater observation data stored in the storage device with the previous observation data. And a comparison device that controls the storage device so that the latest observation data is not stored in the storage device when the difference between the latest observation data and the previous observation data is within a predetermined threshold. An underwater data observation device, comprising: