JPH0321498Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a recording device for a net depth meter with a water temperature gauge that displays the relationship between net depth and water temperature in coordinates on the recording paper of a fish finder.

(Prior art) Purse seine fishing requires dropping a net into the habitat of fish, which is determined by the depth from the sea surface and water temperature. A transmitter is attached that detects the and water temperature values and alternately transmits ultrasonic F signals corresponding to each detected value. The signal from this transmitter is received by the receiver, and the signal processing section performs the desired arithmetic processing on this received signal to determine the net depth and water temperature, and these determined values are Each is displayed on the display section of the indicator.

Therefore, the operator only has to drop the net into the habitat of the fish while looking at the information on the display, thereby increasing the efficiency of fishing. By the way, the information on the net depth and water temperature value determined by the signal processing section is added to a recording paper for a net depth/water temperature recorder, generally a fish finder, and is displayed on the same page as the fish school image.

FIG. 4 shows an example of a display by a recorder for a fish finder. According to this, the oscillation line 2 of the fish finder is written on the top of the recording paper 1, and the oscillation line 2 below this oscillation line 2 is shown. A water temperature value curve 3 and a net depth curve 4 are recorded together with a fish school image 5 with the paper feed direction as the time axis. A water depth scale 6 and a water temperature scale 7 are attached to the recording paper 1, and from these scales 6 and 7, it is possible to determine the relationship between net depth and water temperature.

(Problem to be solved by the invention) However, in the conventional recording device for recording net depth and water temperature, as shown in FIG. Because the plots were drawn parallel to the axis, it was difficult to read at a glance the relationship between net depth and water temperature, and the relationship between the amount of change in water temperature and the amount of change in net depth, which was inconvenient when using recorded materials. .

The present invention was made in order to solve the above conventional problems, and its purpose is to provide a recording device for a net depth meter with a water temperature gauge that can record the relationship between net depth and water temperature in a display format that can be understood at a glance. It's about doing.

(Means for solving the problems) In order to achieve the above object, the present invention is configured as follows. That is, the present invention includes a sensor transmitter that is attached to the bottom of the net, detects the net depth and water temperature, and transmits ultrasonic signals corresponding to each detected value, and a receiver that receives the signals from the sensor transmitter. , a signal processing unit that calculates the net depth and water sound value by processing the received signal, and a recorder that records the net depth and water temperature value determined by the signal processing unit over time. In the recording device for a net depth meter with a water temperature gauge, the signal processing unit includes a memory element for writing and storing data of the net depth and water temperature values obtained through arithmetic processing, and a storage element for writing and storing data of the net depth and water temperature values with respect to the passage of time. A net with a water temperature gauge, which has a coordinate recording signal output section that reads out the data written in the memory element after the recording is completed, and outputs the read data to the recorder as a recording signal that is displayed on orthogonal coordinates consisting of a net depth axis and a water temperature axis. It is a recording device for a depth gauge.

(Function) In the present invention having the above configuration, when starting the purse seine fishing method, a net is first dropped into the sea from a ship. At this time, as the net descends from the sea surface, the sensor transmitter attached to the bottom of the net detects the net depth and water temperature value, and transmits ultrasonic signals corresponding to each detected value, for example, alternately. . On the other hand, a receiver installed on the ship receives a signal from a sensor transmitter and applies the received signal to a signal processing section. The signal processing section performs necessary signal processing such as frequency analysis of the received signal and calculates net depth and water temperature.

The calculated net depth and water temperature data are then written to a predetermined position in the memory element. On the other hand, the net depth and water temperature data are supplied to a recorder, and similar to the conventional example, a net depth curve and a water temperature curve are drawn over time.

Next, after the fishing operation is completed and the net is hoisted onto the vessel, the coordinate recording signal output unit reads data from the memory element, and this read data can be recorded on orthogonal coordinates consisting of the net depth axis and water temperature axis. make a signal and add it to the recorder. As a result of the recorder performing a recording operation based on the signal from the orthogonal coordinate recording signal, the relationship between net depth and water temperature is graphically displayed at a predetermined position on the recording paper surface on orthogonal coordinates consisting of the net depth axis and the water temperature axis. It is. Therefore, it is possible to understand the relationship between net depth and water temperature extremely easily just by looking at this recorded state.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In the description of this embodiment, the same components as those of the conventional example are given the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows the overall configuration of this embodiment, and FIG. 2 shows the details of the circuit configuration of this embodiment. In the figure, the sensor transmitter 8 has a net depth detection section and a water temperature detection section, the net depth detection section detects the net depth by pressure changes corresponding to the depth from the sea surface, and the water temperature detection section The method detects the water temperature by using changes in electrical resistance that change depending on the temperature. Then, each detection value of the net depth detected by the net depth detection section and the water temperature detected by the water temperature detection section is respectively converted into the frequency value of the ultrasonic FM signal, and the net Ultrasonic FM with frequency corresponding to depth
The signal and an ultrasonic FM signal of a frequency corresponding to the water temperature value are alternately transmitted from the sensor transmitter 8.

On the other hand, a wave receiver 9 is suspended from the side near the bottom of a ship (fishing boat), and receives the transmission signal from the sensor transmitter 8. This received signal is applied to the indicator 10, and the indicator 10 performs necessary signal processing as described below. This processed output signal is then sent to the recorder 1 of the fish finder.
It is added to 1. That is, the indicator 1
0 has a calculation section 12, a storage section 13, and a display section (not shown). The calculation unit 12 includes, for example, an amplifier circuit 14 and a frequency conversion circuit 1, as shown in FIG.
5, a computer (CPU) 16, a D/A converter 17, and a DC amplifier circuit 18.

The storage unit 13 is composed of a command storage unit (ROM) 19 and a data storage unit (RAM) 20.
Further, the command storage section 19 and the computer 16 constitute a coordinate recording signal output section 21 .

By the way, the amplifier circuit 14 of the calculation unit 12 amplifies the received signal, and the frequency conversion circuit 15 shifts and converts the frequency of the received signal to a frequency that is easy to perform signal processing. A signal is applied to computer 16. That is, the computer 16 is alternately supplied with a frequency-converted signal of net depth and a frequency-converted signal of water temperature value. The computer 16 compares the frequency of each frequency-converted signal with a calibration frequency preset in the command storage section 19 to obtain net depth and water temperature values. That is, the command storage unit 19 stores a calibration frequency as a calibration standard for each predetermined net depth and a calibration frequency as a calibration standard for each predetermined temperature, and the computer 16 stores the frequency of the frequency conversion signal of the net depth. is compared with the calibration frequency of the net depth to calculate the net depth, and similarly, the frequency of the water temperature frequency conversion signal and the temperature calibration frequency are compared to calculate the water temperature value.

The net depth and water temperature values calculated by the computer 16 are stored in the data storage RAM 20. That is, in the data storage unit 20, for example, m memory elements are arranged, the horizontal axis forming a water temperature axis, and the vertical axis forming a mesh depth axis. n memory elements are arranged, and a total of m×n memory elements are arranged in a mesh shape. Then, the horizontal axis position is specified by the water temperature value, and the vertical axis position is specified by the net depth, and the memory element is located at the intersection of the specified horizontal axis position and the vertical axis position. is stored in some manner, for example in the form of a high potential. In this way, the relationship between the net depth and the water temperature at the net depth position is stored in the orthogonal coordinate system.

On the other hand, the data signals of the net depth and water temperature values calculated by the computer 16 are converted into DC signals by the D/A converter 17, and further
The signal is amplified by the DC amplifier circuit 18 and displayed on the net depth meter and water temperature meter of the display section (not shown), respectively. On the other hand, the DC
The net depth data signal and the water temperature value data signal amplified by the amplifier circuit 18 are added in synchronization with the oscillation line signal of the recorder 11 of the fish finder, and are sent by the recording pen 22 as in the conventional example. A net depth curve 4 and a water temperature value curve 3 are drawn on the recorder 1 with respect to the same time axis.

By the way, the command storage section 19 not only stores the above-mentioned calibration frequencies for the net depth and water temperature values, but also stores calculation operation commands from the computer 16 and the data storage section 2.
It has a built-in program that commands data writing and reading for 0 and controls the timing of each of these commands, and by reading the command from the command storage section 19, the net depth and water temperature values are set as follows. A graph of an orthogonal coordinate system showing the relationship is drawn in the margin of the recording paper 1. That is, after the fishing operation is completed, that is, after the winding of the net is completed, a fishing end signal is manually input into the command storage unit 19, but the command storage unit 1
9 receives this fishing completion signal and sends the data storage section 20 to the data storage section 20.
A data read command is issued in synchronization with the oscillation line signal of the recorder 11 and in accordance with the pen speed and paper feed speed of the recorder 11.

This read command causes the computer 16 to read out the positions (coordinate positions) of the elements in the storage state (the storage elements with a high potential in the above example) arranged in the orthogonal coordinate system of the data storage unit 20 . Then, this read signal is sent from the computer 16 to the D/A
The water is applied to the recorder 11 via the converter 17 and the DC amplifier circuit 18, and is recorded at a predetermined position on the recording paper 1 in orthogonal coordinates with the horizontal axis as the water temperature axis and the vertical axis as the mesh depth axis, as shown in FIG. Ru.

In this case, the orthogonal coordinates drawn on the recording paper 1 correspond to the orthogonal coordinates stored in the data storage unit 20, and therefore, the relationship between the net depth and the water temperature value drawn on the recording paper 1 is The graph showing the coordinate system stored in the data storage unit 20 is the same as the one obtained by rearranging the coordinate system (including similarities).

The fact that the upper part of the curve showing the relationship between net depth and water temperature value is bifurcated indicates that there was a difference between the data when the net was dropped and when it was hoisted up.

Generally, in the purse seine fishing method, after the net is hoisted, work such as transferring the caught fish to a carrier boat is performed, so during that time the operation of the recorder 11 is stopped. In this embodiment, the stop time of the recorder 11 is effectively utilized to graphically display the net depth and water temperature value on orthogonal coordinates. Therefore, it is possible to read the relationship between net depth and water temperature just by looking at this graphically displayed curve.

(Effects of the invention) Since the invention has the configuration and operation described above, the relationship between the net depth and the water temperature value can be displayed on orthogonal coordinates, and by looking at this display, the net depth can be determined. It is possible to know the relationship between the water temperature and the water temperature value, and the amount of change in water temperature with respect to the displacement of the net depth.

In addition, since the relationship between net depth and water temperature can be read at a glance, it is very convenient for organizing and examining recorded materials.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the detailed configuration of the indicator in FIG. FIG. 4 is an explanatory diagram showing an example of recording by a recording machine using a conventional apparatus. 1... Recording paper, 2... Fish finder oscillation line, 3
...Curve of water temperature value, 4...Curve of net depth, 5...
Fish school image, 6...Water depth scale, 7...Water temperature scale, 8
...sensor transmitter, 9 ... wave receiver, 10 ... indicator, 11 ... recorder, 12 ... calculation unit, 13 ...
Storage section, 14...Amplification circuit, 15...Frequency conversion circuit, 16...Computer, 17...D/A converter, 18...DC amplifier circuit, 19...Command storage section, 20...Data storage section, 21... Coordinate recording signal output unit, 22... Recording pen.

Claims (1)

[Scope of utility model registration request] A sensor transmitter attached to the bottom of the net that detects net depth and water temperature and transmits ultrasonic signals corresponding to each detected value, a receiver that receives signals from the sensor transmitter, and calculates the received signals. A net depth meter with a water temperature gauge that includes a signal processing unit that processes the net depth and water temperature values, and a recorder that records the net depth and water temperature values determined by the signal processing unit over time. In the recording device, the signal processing section includes a memory element for writing and storing data of net depth and water temperature values obtained through arithmetic processing, and a memory element for writing and storing data of the net depth and water temperature values obtained through arithmetic processing, and a memory element for writing and storing data of the net depth and water temperature values with respect to the passage of time. A net depth meter with a water temperature gauge, characterized in that it has a coordinate recording signal output section that reads written data and outputs the read data to a recorder as a recording signal that is displayed on orthogonal coordinates consisting of a net depth axis and a water temperature axis. recording device.