JP2516022Y2 - Fish finder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fish finder.

[Conventional technology]

Taking a conventional fish finder that uses sound waves as an example, in this type of finder, sound waves are transmitted from the transmitter, and the reflected wave from the fish school is received by the receiver based on the timing of this transmission. By measuring the time until it is detected by
Generally, the depth at which a school of fish is located is displayed on a CRT or the like, and conventional detectors always have a transmitter and a receiver in this way.

[Problems to be solved by the device]

Here, considering the case of fishing boats, recent fishing boats are equipped with a fish finder with the same structure as that described above, so the angler will see the fish fleet based on the display of this fish finder. The depth of the can be easily grasped. However, if the depth of the fence changes during fishing, it is difficult to understand this change from the berth, and there is room for improvement.

It may be possible for each angler to carry a small fish finder to eliminate this inconvenience, but it is difficult to grasp the fence at a deep depth with high accuracy due to the small output of sound waves with a small fish finder. Not only that, but sound waves may interfere with each other when a plurality of detectors operate at the same time, and there is room for improvement in this respect as well.

An object of the present invention is to eliminate the above-mentioned inconvenience and reasonably configure a device that enables an angler to accurately grasp the change in the depth of the fence.

[Means for solving the problem]

The feature of the present invention is that the time required until the reflected wave is detected by this receiver is measured on the basis of the timing at which the transmitted wave is detected by the receiver, and the position of the object causing the reflected wave is displayed on the display means. It is provided with a control means for outputting, and its operation and effect are as follows.

[Action]

When the above features are configured as shown in FIGS. 1 to 4, for example, when the fish finder is used at the berth, the receiver (6) is arranged in water to prepare for the fishing boat (S). This receiver (6) detects the transmission wave from the transmitter (7) of the fish finder and uses it as a reference for time measurement.
When this receiver (6) detects a reflected wave, the position of the object that generated the reflected wave is displayed on the display means (D) based on the measurement time required until this detection.

That is, in the present invention, since the transmitter is not provided and only the receiver is provided, the transmitter and the output system for the transmission are not required, and the device can be downsized, and the portable fish finder is small. It is also possible to grasp the position of an object in the water by using the high-output transmitted wave that cannot be obtained.

[Effect of device]

Therefore, even if the depth of the fence changes during fishing, the angler can accurately determine the depth of the fence, and the device is simply configured for downsizing.

In particular, since this device does not include a transmitter, there is an effect that interference does not occur even if each of a plurality of anglers on the fishing boat uses this device.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a liquid crystal display (D) as a display means, a frequency setting switch (1), a range setting switch (2), and a correction switch (3) each of a seesaw type are provided in the main body case. In preparation for (4),
A fish finder is configured with a receiver (6) connected to the main body case (4) through a waterproof cord (5).

In this detector, as shown in FIG. 3, when fishing is carried out in an environment having a fish finder having a transmitter (7) nearby, such as when fishing with a fishing boat (S), the transmitter (7 ) And a reflected wave from an underwater object (8) such as a school of fish.

That is, the outline of the control system of the fish finder of the present invention is
As shown in the figure, a control device (9) (control) having an output system for the liquid crystal display (D), a range setting switch (2), a correction switch (3) and an input system from a receiver (6). And a band pass filter (10) for changing the filtrate band by the frequency setting switch (1) is installed in the receiving system, and further the frequency setting switch (1) is operated. The selected value is displayed on the first display section (11) of the display (D), and the numerical value (12) indicating the depth of the display (D) is changed by operating the range setting switch (2). By operating the correction switch (3), the value to be corrected is displayed on the second display section (13) of the display (D) (these display operations are not described in detail).

Incidentally, the value set by the correction switch (3) is the distance (A) between the transmitter (7) and the receiver (6) provided on the fishing boat as shown in FIG. The value set by the setting switch (1) is the value of the frequency transmitted from the transmitter (7) provided in the fishing boat (S).

Further, the image display section (14) of the display (D) is set such that the vertical direction is set to the depth axis and the horizontal direction is set to the time axis, and the control operation (only one scan) at the time of scanning in the depth axis direction is performed. This is performed as shown in the flowchart of FIG.

That is, when the control is started, after setting the correction value and the range value, the timer is operated at the timing of detecting the transmission wave from the receiver (7) (steps # 1 to # 4).

Next, each time a reflected wave is detected, the operation of storing the timer value at the detected timing in the memory is performed until the timer value reaches the limit of the range value (# 5 to # 8 steps), and after this operation, the timer is turned on. Image display by clearing, converting store data into distance data, correcting the distance data after such conversion based on the correction value, compressing based on the range value, and outputting to the display (D) Division (14)
An image for one scan is displayed in the vertical direction (steps # 9 to # 12).

[Another embodiment]

In addition to the above embodiment, the present invention is, for example, as shown in FIG. 5, a control case (1
5) The fish finder is built into the reel control case (15), and the fence display (16) is also used as the detector display device, or as shown in FIG. The display means (D) can be specially provided, and as shown in FIG. 6, the fishing rod (17) can be attached to the berth (18).
The main body case (4) of the fish finder can be detachably attached to the holder portion (19A) of the rod receiver (19) for supporting it.

Further, in the present invention, a small CRT may be used as the display means, and all the control means may be configured by hardware,
Further, the display means alone can be detached from the main body of the apparatus so that only the display means can be attached to the fishing reel for use.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a fish finder according to the present invention. FIG. 1 is a front view of the finder, FIG. 2 is a block circuit diagram showing the configuration of the finder, and FIG. 3 is the use of the finder. FIG. 4 is a flow chart showing the operation of the detector, FIG. 5 is a plan view of another embodiment in which the detector is provided on the reel, and FIG. 6 is a rod receiver. It is a side view of another example of the form which the detector was constituted so that attachment or detachment was possible. (6) ... Receiver, (9) ... control means, (D) ... display means.

Claims (1)

(57) [Scope of utility model registration request] 1. A time required until a reflected wave is detected by the receiver (6) is measured with reference to a timing at which the transmitted wave is detected by the receiver (6), and an object of which the reflected wave is generated is measured. A fish finder comprising control means (9) for outputting position to display means (D).