Fish finder debugging system based on acoustic signal reflection from fish schools

Abstract

This invention discloses a fish finder debugging system based on the acoustic signal reflection of fish schools. The fish finder debugging system includes: a cross reflector, a float, a compass, an anchor, a test vessel, and a shipborne communication module, a display module, a compensation value solving module, a shipborne positioning module, a fish finder under test, and a transducer. The fish finder debugging system based on acoustic signal reflection can achieve accurate simulation of the acoustic signal reflection of fish schools at sea at low cost, providing conditions for the debugging of fish finders at sea.

Description

Technical Field

[0001] This invention relates to the field of acoustic signal simulation, and specifically to a fish finder debugging system based on the acoustic signal reflection of fish schools. Background Technology

[0002] Fish finders, as one of the most widely used and typical fishing aids in marine fisheries, are the primary tools for detecting the quantity and spatial location of marine fish schools using underwater acoustic methods. Fish finders can be divided into horizontal and vertical fish finders according to their detection direction. Horizontal fish finders detect targets horizontally relative to the fishing vessel, enabling wider-area sea sweeping and improving the efficiency of marine fishing. During the development of horizontal fish finders, the testing and experimentation phases present significant challenges. Because actual fish schools are difficult to detect immediately, and even if they are detected, information such as the size and condition of the fish cannot be known in advance, performance testing of the fish finder is extremely difficult.

[0003] In existing technologies, solid steel spheres or acoustic transponders can be used to simulate the acoustic signal reflection characteristics of fish schools. Using a solid steel sphere to simulate the underwater acoustic echo of a fish school requires a sphere diameter related to the target intensity of the fish school; typically, achieving a zero-decibel target reflector requires a 2-meter radius solid steel sphere. Such a large and heavy simulated reflector is difficult to handle during sea trials, making it almost impossible to use. When using an acoustic transponder, the transponder detects the fish-finding signal and transmits the received signal upon detection. This process involves a certain delay, and the simulation accuracy depends on the compatibility of the transponder receiver, transmitter, and transponder signal processing capabilities. Therefore, using transponders for accurate simulation is demanding, complex, and expensive. Thus, providing a low-cost and accurate simulation device for simulating the acoustic signal reflection of fish schools at sea, and thus calibrating fish finders, is a problem that needs to be solved. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to achieve accurate simulation of the acoustic signal reflection of schools of fish at sea under low cost conditions, and to debug the fish finder based on the above acoustic signal reflection.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A fish finder debugging system based on the acoustic signal reflection of fish schools, the fish finder debugging system comprising:

[0007] The cross-shaped reflector is constructed by fixing and connecting rigid plates.

[0008] A float is located above the cross reflector and is connected to the upper part of the cross reflector via a first cable;

[0009] The compass, located above the cross reflector, is connected to the communication module in the float via a communication data line;

[0010] An anchor, located below the cross reflector, is connected to the lower part of the cross reflector via a second cable;

[0011] The test vessel includes a shipborne communication module, a display module, a compensation value solving module, a shipborne positioning module, a fish finder under test, and a transducer. The output of the shipborne communication module is connected to the display module and the compensation solving module. The output of the positioning module is connected to the compensation solving module. The transducer is used for converting electrical signals to acoustic signals and for transmitting detection signals and receiving water wave echo signals.

[0012] Preferably, the cross reflector is formed by a first rigid plate and a second rigid plate fixedly connected together in a cross shape. The cross reflector forms a first test orientation, a second test orientation, a third test orientation and a fourth test orientation in a counterclockwise direction. All test orientations can be used to reflect detection signals.

[0013] Preferably, the compass is used to measure the azimuth angle of the cross reflector.

[0014] Preferably, the float also includes a positioning module, which is electrically connected to the communication module and is used to wirelessly transmit the position of the cross reflector.

[0015] Furthermore, the communication module is used to wirelessly transmit the azimuth angle of the cross reflector.

[0016] Preferably, the shipborne communication module can wirelessly communicate with the communication module in the floating body.

[0017] Preferably, the compensation value calculation module calculates the compensation value based on the information from the shipborne communication module and the shipborne positioning module.

[0018] Furthermore, the fish finder under test is adjusted using the compensation value.

[0019] Preferably, the rigid plate can be a steel structure plate, and the communication data line can be a watertight twisted pair cable.

[0020] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0021] The positive and progressive effects of this invention are that it can achieve accurate simulation of the acoustic signal reflection of schools of fish at sea at low cost, thus providing conditions for the debugging of fish finders at sea. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a device system in one embodiment of the fish finder debugging system based on the acoustic signal reflection of a school of fish according to the present invention.

[0023] Figure 2 This is a reflection signal diagram of a cross reflector in one embodiment of the fish finder debugging system based on the acoustic signal reflection of a school of fish according to the present invention.

[0024] Figure 3 This is a schematic diagram of the signal when the detection signal is aligned with the direction of the cross reflector in one embodiment of the fish finder debugging system based on the acoustic signal reflection of a school of fish according to the present invention.

[0025] Figure 4 This is a diagram showing the relative positions of the cross reflector and the test vessel in one embodiment of the fish finder debugging system based on the acoustic signal reflection of a school of fish according to the present invention. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the application. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In one example, such as Figure 1 The diagram shown is a structural diagram of a device system according to an embodiment of the present invention. The cross reflector 100 includes a first rigid plate 100a and a second rigid plate 100b, which are arranged in a cross shape. Figure 2The diagram shows the reflection signal of the cross reflector 100 in one embodiment of the present invention. The cross reflector 100 forms the first test orientation 100s1, the second test orientation 100s2, the third test orientation 100s3, and the fourth test orientation 100s4 in a counterclockwise direction. All of the test orientations can be used to reflect the detection signal to form an underwater acoustic echo signal.

[0030] In one example, the upper part of the cross reflector 100 is connected to the compass 200, which is used to measure the azimuth angle of the cross reflector 100 in the ocean. The compass 200 is connected to the communication module 500b in the buoy 500 via the communication data line 400 to transmit the real-time azimuth angle information of the cross reflector 100 to the communication module 500b.

[0031] In one example, the upper part of the cross reflector 100 is also connected to the first cable 300a, the other end of which is connected to the float 500, which is located above the cross reflector 100 and is used to mark the cross reflector 100 in the ocean.

[0032] In an optional example, the float 500 includes the positioning module 500a, which measures the position of the float 500 in real time. Typically, the distance between the test vessel 900 and the float 500 is much greater than the length of the cable connected to the float, so the position of the float 500 can be approximately equal to the position of the cross reflector 100.

[0033] In an optional example, the float 500 further includes the communication module 500b, which is electrically connected to the positioning module 500a. The output of the positioning module 500a is connected to the input of the communication module 500b, transmitting the position information of the cross reflector 100 to the communication module 500b. The communication module 500b is used to wirelessly communicate with the shipborne communication module 900a in the test vessel 900 to realize the real-time transmission of the direction angle and position data of the cross reflector 100.

[0034] In one example, the lower part of the cross reflector 100 is connected to the second cable 300b, the other end of which is connected to the anchor 600, which is located below the cross reflector 100 and is used to stabilize the cross reflector 100 in the ocean.

[0035] In one example, the output of the shipborne communication module in the test vessel 900 is connected to the display module 900b and the compensation value solving module 900c, respectively. The output of the shipborne positioning module 900d is connected to the compensation value solving module 900c. The compensation value solving module 900c calculates the positional relationship between the test vessel 900 and the cross reflector 100 based on the azimuth and real-time position information of the cross reflector 100 in the shipborne communication module 900a and the position information of the test vessel 900 in the shipborne positioning module 900d. This determines the real-time equivalent target intensity of the cross reflector 100 and provides a target compensation value relative to zero decibels, thereby enabling the debugging of the fish finder 900e under test in the test vessel 900.

[0036] In one example, the fish finder 900e under test in the test vessel 900 is connected to the transducer 900f. The transducer 900f converts electrical signals into acoustic signals. When transmitting a detection signal, the transducer 900f converts the electrical signal into a detection signal for transmission. When receiving a water wave echo signal, the transducer 900f converts the water wave echo signal into an electrical signal and transmits it to the fish finder 900e under test.

[0037] In one example, such as Figure 3 The diagram shows a signal diagram of the angle between the detection signal and the cross reflector 100 in one embodiment of the present invention. When the angle between the detection signal and the cross reflector 100 is consistent, almost all of the detection signal is reflected back, and the equivalent intensity of the cross reflector 100 is zero decibels. When the angle between the detection signal and the reflector is not parallel, some of the reflected sound waves will be lost. Different intensities of underwater acoustic echo signals are generated according to the different angles between the detection signal and the cross reflector 100, which are equivalent to fish targets of different intensities.

[0038] In one example, such as Figure 4The diagram shows the relative positions of the cross reflector 100 and the test vessel 900 in one embodiment of the present invention. The distance between the test vessel 900 and the float is much greater than the length of the connecting cable. Therefore, the position of the float can be approximately equal to the position of the cross reflector 100. The relative lateral angle 'a' is calculated based on the received float positioning data and the vessel position data provided by the shipborne positioning module. Then, the direction 'b' of the reflector plate of the cross reflector 100 is calculated based on the azimuth angle of the cross reflector 100 measured by the compass 200. The direction 'b' of the angle between the first rigid plate 100a and the second rigid plate 100b is calculated as b-45°, and thus the detection... The angle between the signal and the two rigid plates is a-(b-45°). The bearing of the test vessel 900 relative to the float, i.e., the cross reflector 100, is then determined. The relative position of the cross reflector 100 and the test vessel 900 is displayed on the display module on the test vessel 900. This information is used as a reference when adjusting the position of the test vessel 900 so that the test can be conducted in a direction with greater target intensity, thereby achieving better test results. The accurate target intensity of the equivalent fish swarm of the cross reflector 100 in real time is obtained through the compensation and settlement module for subsequent accurate analysis and correction of test data.

[0039] In one alternative example, the rigid plate can be the steel structure plate, and the communication data line 400 can be the watertight twisted pair cable.

[0040] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A fish finder debugging system based on the acoustic signal reflection of fish schools, characterized in that, The fish finder debugging system includes: The cross reflector is constructed by fixing and connecting rigid plates. The cross reflector is constructed by fixing and connecting a first rigid plate and a second rigid plate in a cross shape. The cross reflector forms a first test orientation, a second test orientation, a third test orientation and a fourth test orientation in a counterclockwise direction. All test orientations can be used to reflect detection signals. A float is located above the cross reflector and is connected to the upper part of the cross reflector via a first cable; The compass, located above the cross reflector, is connected to the communication module in the float via a communication data line; An anchor, located below the cross reflector, is connected to the lower part of the cross reflector via a second cable; The test vessel includes a shipborne communication module, a display module, a compensation value solving module, a shipborne positioning module, a fish finder under test, and a transducer. The output of the shipborne communication module is connected to the display module and the compensation solving module. The output of the positioning module is connected to the compensation solving module. The transducer is used for converting electrical signals to acoustic signals and for transmitting detection signals and receiving water wave echo signals.

2. The fish finder debugging system as described in claim 1, characterized in that, The compass is used to measure the azimuth angle of the cross reflector.

3. The fish finder debugging system as described in claim 1, characterized in that, The floating body also includes a positioning module, which is electrically connected to the communication module and is used to wirelessly transmit the position of the cross reflector.

4. The fish finder debugging system as described in claim 3, characterized in that, The communication module is used to wirelessly transmit the azimuth angle of the cross reflector.

5. The fish finder debugging system as described in claim 1, characterized in that, The shipborne communication module can communicate wirelessly with the communication module in the floating body.

6. The fish finder debugging system as described in claim 1, characterized in that, The compensation value calculation module calculates the compensation value based on the information from the shipborne communication module and the shipborne positioning module.

7. The fish finder debugging system as described in claim 6, characterized in that, The fish finder under test is adjusted using the compensation value.

8. The fish finder debugging system as described in any one of claims 1-7, characterized in that, The rigid plate can be a steel structure plate, and the communication data line can be a watertight twisted pair cable.

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