JPS64622Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recording device suitable for use in a fish finder.

In the recording method of conventional fish finders, the recording needle moves on a moving electrical discharge destruction recording paper in a direction perpendicular to the recording paper, and the recording needle responds to the voltage by generating a voltage corresponding to the intensity of the received reflected wave. However, the movement of the recording needle inevitably causes wear, deterioration of performance, and failure of the mechanical parts.

In addition, in recent years, digital data processing has become widespread, and there is an increasing demand for multifunctional fish finders such as seawater temperature display and time display.However, conventional recording methods have low image resolution and analog voltage waveforms on the recording needle. It was difficult to print text information because of the need to add text.

In view of the above-mentioned difficulties in the conventional technology, the present invention relates to a device for recording information such as schools of fish and the seabed using an electronic solid-state scanning recording method. The purpose of the present invention is to provide a recording device for a fish finder that easily performs the following.

Embodiments of the present invention shown in the drawings will be explained in detail below.

In FIG. 1, reflected signals from schools of fish, the seabed, etc., which are applied via the signal line 1, are classified into print gradations _L0 to _L0 by the A/D converter 2, and stored in the storage device 4 in the order of processing time. Ru. This process is shown in more detail in FIG. 2 as follows. In FIG. 2, reference numeral 21 indicates the waveform of the reflected signal, and T ₀ to _{T n} indicate processing timings of A/D conversion. L ₀ to L _o correspond to the density level recorded during printing, for example, L ₀
The recording density increases in the order of L ₀ , L ₁ , L _{2 .} . . _{L o ,} with L o having the lightest density and L o having the highest density. Further, L ₀ to L _o also correspond to levels between thresholds during A/D conversion.
For example, since the level of the reflected signal at timing T ₀ corresponds to L ₀ , L ₀ is stored in the storage device 4 in correspondence with timing T ₀ , and thereafter for T _1.
L ₀ , T ₂ for L ₀ , T ₃ for L ₂ , ...T _n
L ₀ , . . . are stored sequentially. This situation is shown in the upper two rows of the table in FIG. 3 as a relationship between T and L.

The reflected signal is stored in the storage device 4 as described above. Here, as the solid-state scanning recording device 9,
Consider a solid-state scanning thermal recording head that includes a shift register the length of one scan line. In FIG. 1, the extraction circuit 6 supplies timing information T _k to the storage device 4 via the signal line 7, and extracts the corresponding density signal L _k via the signal line 5, which corresponds to the density gradation to be printed. Extract the timing signals T ₀ , T ₁ ...
The images are arranged in this order, transferred to the shift register of the solid-state scanning recording device 9, and the solid-state scanning recording device 9 is driven to obtain an image of the same density. In FIG. 3, the extraction circuit 6 first sequentially extracts L ₀ corresponding to the gradation 0, and sends it to the shift register inside the solid-state scanning recording device 9 via the signal line 8 in FIG.
The recording paper 10 corresponding to the gradation level 0 is created by storing the signals as shown in the step 1 and applying the energy corresponding to the density L ₀ to the solid-state scanning recording device 9 using methods such as voltage value control and voltage application time control. Print at the top position. Here, for example, as the voltage value control method, there is a method of adjusting the voltage applied to the heating element of the solid-state scanning type thermal recording head to obtain printing energy proportional to the square of the applied voltage value, and a method of controlling the voltage application time. As a method, the voltage applied to the heating element may be fixed and the time for applying the voltage may be adjusted to obtain printing energy proportional to the application time. Next, a signal corresponding to gradation 1 is extracted in the same manner, the signal as shown in the gradation 1 stage in the table is stored in the shift register, and gradation 1 is extracted using the same control method as above. An image is printed at a position on the recording paper 10 corresponding to . Thereafter, in the same way, signals corresponding to gradations up to n are sequentially extracted, stored in the shift register, and then printed at respective positions on the recording paper 10, so that the reflected signal 1 is printed on the thermal recording paper 10. Obtain the corresponding concentration record. The bottom row of FIG. 3 shows the arrangement of pixels for one scanning line obtained in this way.

Note that here, to simplify the explanation, storage and retrieval from the storage device 4 are performed in different periods, but real-time processing using time division and buffer processing using multiple storage devices are used. Speeding up the processing is within the scope of the present invention.

As described above, according to the present invention, it is possible to easily record not only analog information such as fish schools and the seabed, but also character information such as seawater temperature and time, making multifunctional recording possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a graph showing a reflected waveform for explaining the input signal 1 in the embodiment of FIG. 1, and FIG. 3 is a table showing signal states and recording results of each part in FIG. 1. 1, 3, 5, 7, 8...Signal line, 2...A/D
Converter, 4...Storage device, 6...Extraction circuit, 9...
...solid-state scanning recording device, 10...recording paper, 21...
reflected signal.

Claims (1)

[Scope of utility model registration request] In a recording device that displays reflected waves from a fish finder as shading on a recording paper once or multiple times per transmission cycle or multiple cycles, recording elements are arranged in a line and a plurality of pixels are simultaneously displayed in a predetermined manner. An electronic solid-state scanning recording device incorporating a shift register for one scanning line capable of printing within a certain density range, a storage device that stores time series data obtained by A/D converting the amplitude of the reflected wave, and the storage device a circuit for extracting identical value data arbitrarily designated from among the data, the extraction circuit sequentially extracts and arranges the identical value data in the storage device, and the recording element of the recording device prints the same value data at the corresponding density. A recording device for a fish finder, characterized in that a recording operation performed on a recording paper is sequentially repeated according to a predetermined number of density gradations, and the reflected wave is converted into a density corresponding to its amplitude and recorded.