BE1028342B1 - FISH FINDER DEBUG SYSTEM BASED ON A REFLECTION OF AN ACOUSTIC SIGNAL FROM A SCHOOL OF FISH - Google Patents

Abstract

A fish finder debugging system based on a reflection of an acoustic signal from a school of fish. Fish finder debugging system includes cross reflector, float, compass, anchor, test vessel, and onboard communication module, display module, compensation value solution module , an onboard positioning module, a fish finder to be tested, and a transducer that are mounted on the test vessel. The fish finder debugging system can accurately simulate an accurate reflection of an acoustic signal from a school of sea fish at low cost, providing a condition for debugging a sea fish finder.

Description

FISH FINDER DEBUG SYSTEM BASED ON A REFLECTION OF AN ACOUSTIC SIGNAL FROM A SCHOOL OF FISH

TECHNICAL FIELD This disclosure relates to the field of acoustic signal simulation, and specifically to a fish finder debugging system based on a reflection of an acoustic signal from a school of fish. TECHNOLOGICAL BACKGROUND The fish finder is one of the most commonly used auxiliary fishing instruments in sea fishing. It detects a quantity and spatial positions of a school of sea fish via an underwater acoustic process. According to a detection direction, fish finders can be divided into a horizontal fish finder and a vertical fish finder. The horizontal fish finder detects a target in a horizontal direction of a fishing vessel, and can scan the sea at a greater azimuth, and improve the fishing efficiency of sea fishing. When it is necessary to test a horizontal fish finder during the development process, it is difficult to find an actual fish school target immediately. Even if a school of fish is detected, information such as size and status of the school of fish cannot be known in advance. This causes a significant difficulty for a performance test of the fish finder. In the prior art, a solid steel ball or an acoustic transponder can be used to simulate a reflection of an acoustic signal from a school of fish. The solid steel ball is used to simulate a reflection of an underwater acoustic echo from a school of fish. A diameter of the steel ball is relative to a target intensity of a school of fish to be simulated. In a typical case, a solid steel ball with a radius of 2 meters is needed to obtain a target reflector with zero decibels. It is difficult to operate a simulated reflector with such volume and weight in an experiment at sea. When a fish detection signal is detected using the acoustic transponder, the signal just received is transmitted. There is a delay in this process, and the simulation accuracy depends on the mapping between a receiver, a transmitter of the transponder and a signal processing capability of the transponder. That is, accurate simulation using the transponder requires strict conditions and involves complicated operation and high costs. Therefore, how to provide an apparatus for accurately simulating a reflection of an acoustic signal from a school of sea fish at low cost in order to debug the fish finder is still a problem currently to be solved.

SUMMARY A technical problem to be solved by the present disclosure is how to accurately simulate a reflection of an acoustic signal from a school of sea fish at low cost, and to debug a fish finder based on a reflection of the acoustic signal. The present disclosure adopts the following technical solution to solve the above technical problem: A fish finder debugging system based on reflection of an acoustic signal from a school of fish is provided, in which the fish finder debugging system fish finder includes: a cross reflector, formed by connecting rigid panels in a fixed manner; a float, located above the cross reflector, and connected to an upper part of the cross reflector by a first cable; a compass, located on the upper part of the cross reflector and connected to a communication module in the float by a communication data line; an anchor, located below the cross reflector, and connected to a lower part of the cross reflector by a second cable; and a test vessel, and an onboard communication module, a display module, a compensation value solution module, an onboard positioning module, a fish finder to be tested, and a transducer which are mounted on the test vessel, where an output end of the shipboard communication module is connected to the display module and the compensation value solution module, an output end of the positioning module is connected to the value solution module compensation, and the transducer is configured to convert between an electrical signal and an acoustic signal, and is further configured to transmit a detection signal and receive an underwater acoustic echo signal.

Preferably, the cross reflector is formed by connecting a first rigid panel and a second rigid panel in a fixed manner and is made in the shape of a cross, the cross reflector separately forms a first test azimuth, a second test azimuth , a third test azimuth and a fourth test azimuth in a counterclockwise direction, and the test azimuths can each be used to reflect a detection signal.

Preferably, the compass is configured to measure an azimuth angle of the crosshair reflector.

Preferably, the float further comprises a positioning module, which is electrically connected to the communication module, and is configured to wirelessly transmit a position of the cross-shaped reflector.

Further, the communication module is configured to wirelessly transmit the azimuth angle of the crosshair reflector.

Preferably, the onboard communication module can communicate wirelessly with the communication module in the float.

Preferably, the compensation value solution module calculates a compensation value based on information from the on-board communication module and the on-board positioning module.

Also, the fish finder to be tested is debugged according to the compensation value.

Preferably, the rigid panel may be a structural steel panel, and the communication data line may be a waterproof twisted pair line.

Based on the general knowledge in this field, the preferred conditions mentioned above can be arbitrarily combined to obtain preferred examples of the present disclosure.

The present disclosure has the following positive effects: an accurate reflection of an acoustic signal from a school of sea fish is accurately simulated at low cost, providing a condition for debugging a sea fish detector.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural diagram of an apparatus system in one embodiment of a fish finder debugging system based on a reflection of an acoustic signal from a school of fish according to the this disclosure; Figure 2 is a diagram of a reflection signal from a cross reflector in one embodiment of a fish finder debugging system based on a reflection of an acoustic signal from a school of fish according to the this disclosure; Figure 3 is a schematic diagram of a signal when a direction of a detection signal consistent with a direction of an included angle of a cross reflector in one embodiment of a detector debugging system of fish based on a reflection of an acoustic signal from a school of fish according to the present disclosure; and Fig. 4 is a diagram of relative positions of a cross reflector and a test vessel in one embodiment of a fish finder debugging system based on a reflection of an acoustic signal from a shoal of fish according to this disclosure.

DETAILED DESCRIPTION To facilitate understanding of this application, this application is described more comprehensibly below with reference to the accompanying drawings. Preferred embodiments of this application are given in the accompanying drawings. However, this application can be implemented in many different forms, and is not limited to the embodiments described in this description. On the contrary, these embodiments are provided in such a way that the disclosure of this application is more complete and understandable.

It should be noted that where a component is considered to be "connected" to another component, the component may be directly connected to the other component and integrated with the other component, or there may be an intermediate component. The terms "mount", "one end", "another end", and similar expressions used in this description are used for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art of this application. The terms used herein are merely intended to describe specific embodiments, and are not intended to limit this application. The term "and/or" used 1c1 includes any and all combinations of one or more of the associated listed parts.

In one example, Fig. 1 is a structural diagram of an apparatus system according to one embodiment of the present disclosure. A cross reflector 100 includes a first rigid panel 100a and a second rigid panel 100b. The first rigid panel 100a and the second rigid panel 100b are made in the shape of a cross. Fig. 2 is a diagram of a reflection signal from a cross reflector 100 according to one embodiment of the present disclosure. The cross reflector 100 separately forms a first test azimuth 100s1, a second test azimuth 100s2, a third test azimuth 100s3 and a fourth test azimuth 100s4 in a counterclockwise direction, and each test azimuths can be used to reflect a detection signal, to form an underwater acoustic echo signal.

In one example, an upper portion of the cross reflector 100 is connected to a compass 200. The compass 200 is configured to measure an azimuth angle of the cross reflector 100 in the sea. The compass 200 is connected to a communication module 500b in a float 500 by a communication data line 400, in order to transmit real-time information of the azimuth angle of the cross reflector 100 to the communication module 500b.

In one example, the upper part of the cross reflector 100 is further connected to a first cable 300a. The other end of the first cable 300a is connected to the float

500. Float 500 is located above cross reflector 100, and is configured to mark cross reflector 100 in the sea.

In an optional example, float 500 includes positioning module 500a. The positioning module 500a measures a position of the float 500 in real time. Usually, a distance between test vessel 900 and float 500 is much greater than a length of cable connected to the float. Therefore, the position of the float 500 can be approximately a position of the cross reflector 100.

In an optional example, float 500 further includes communication module 500b. The communication module 500b is electrically connected to the positioning module 500a. An output end of the positioning module 500a is connected to an input end of the communication module 500b, in order to transmit position information from the cross reflector 100 to the communication module 500b. Communication module 500b is configured to communicate wirelessly with an on-board communication module 900a in test vessel 900, to send azimuth angle and position data from crosshairs 100 in real time.

In one example, a lower portion of cross reflector 100 is connected to a second cable 300b. The other end of the second cable 300b is connected to an anchor 600.

The anchor 600 is located below the cross reflector 100, so that the cross reflector 100 is stabilized in the sea.

In one example, an output end of the onboard communication module in the test vessel 900 is separately connected to a display module 900b and a compensation value solution module 900c. An output end of an edge positioning module 900d is connected to the compensation value solution module 900c. The compensation value solution module 900c resolves a positional relationship between the test vessel 900 and the crosshair reflector 100 based on the azimuth angle and real-time position information of the crosshair reflector 100 in the on-board communication module 900a and position information from the test vessel 900 in the on-board positioning module 900d, to determine a real-time equivalent target intensity of the cross reflector 100. Further, a target compensation value relative to zero decibel is provided, to debug a fish finder to be tested 900th in the 900 test vessel.

In one example, fish finder to be tested 900e in test vessel 900 is connected to a transducer 900f. The 900f transducer implements a conversion between an electrical signal and an acoustic signal. When transmitting a detection signal, transducer 900f converts the electrical signal into a detection signal for transmission. Upon receiving an underwater acoustic echo signal, the transducer 900f converts the underwater acoustic echo signal into an electrical signal, and transmits the electrical signal to the fish finder under test 900e.

In one example, FIG. 3 is a schematic diagram of a signal relating to a relationship between a direction of a detection signal and a direction of an included angle of a cross reflector 100 according to one embodiment of the this disclosure. When the direction of the detection signal is consistent with the direction of the included angle of the crosshair reflector 100, almost all of the detection signals are reflected back, and a tested equivalent intensity of the crosshair reflector 100 is zero decibels. When the direction of the detection signal is not parallel to the direction of the included angle of the reflector, some reflected acoustic waves are lost. According to different directions of the detection signal and directions of the included angle of the cross reflector 100, underwater acoustic echo signals having different intensity are generated, and are equivalent to fish targets having different intensity.

In one example, Figure 4 is a graph of relative positions of a crosshair reflector 100 and a test vessel 900 according to one embodiment of the present disclosure. The distance between the 900 test vessel and the float is much greater than the length of the connected cable. Therefore, the position of the float can be approximately the position of the cross reflector 100. A relative transverse angle α is set according to received float positioning data and ship position data provided by the onboard positioning module. Then, a direction b of a reflection panel of the cross reflector 100 is set according to the azimuth angle of the cross reflector 100 measured by the compass 200, and a direction of an included angle between the first rigid panel 100a and the second rigid panel 100b is b-45°. Further, an included angle between the direction of the detection signal and the direction of the included angle of the two rigid panels is a-(b-45°). Finally, a current azimuth of the test vessel 900 relative to the float, i.e. the crosshair reflector 100, is obtained. The in-vessel display module 900 displays a relative positional relationship between the crosshair reflector 100 and the test vessel 900, and the relative positional relationship is used as a reference when a position of the test vessel 900 is adjusted. to perform an experiment in an azimuth having a relatively high target intensity, and achieve a better experimental effect. In addition, an accurate target intensity of the cross reflector 100 equivalent to a school of fish in a real-time experiment is obtained by a compensation value sedimentation module, to perform accurate analysis and correction of consecutive experimental data. In an optional example, the rigid panel may be a structural steel panel, and the communication data line 400 may be a waterproof twisted pair line.

Although specific implementations of this disclosure have been described above, those skilled in the art should understand that these are examples only, and that the scope of protection of this disclosure is defined by the appended claims.

Those skilled in the art may make various changes or modifications to these implementations without departing from the principle and essence of this disclosure, but all such changes and modifications fall within the protective scope of this disclosure.

Claims (9)

1. A fish finder debugging system based on a reflection of an acoustic signal from a school of fish, wherein the fish finder debugging system comprises: a cross reflector, formed by connecting rigid panels of a fixed way; a float, located above the cross reflector, and connected to an upper part of the cross reflector by a first cable; a compass, located on the upper part of the cross reflector and connected to a communication module in the float by a communication data line; an anchor, located below the cross reflector, and connected to a lower part of the cross reflector by a second cable; and a test vessel, and an onboard communication module, a display module, a compensation value solution module, an onboard positioning module, a fish finder to be tested, and a transducer which are mounted on the test vessel, in which an output end of the shipboard communication module is connected to the display module and the compensation value solution module, an output end of the positioning module is connected to the compensation value, and the transducer is configured to convert between an electrical signal and an acoustic signal, and is further configured to transmit a detection signal and receive an underwater acoustic echo signal. 2. A fish finder debugging system according to claim 1, wherein the cross reflector is formed by connecting a first rigid panel and a second rigid panel in a fixed manner and is made in a cross shape, the cross reflector separately forms a first test azimuth, a second test azimuth, a third test azimuth and a fourth test azimuth in a counterclockwise direction, and the test azimuths can each be used to reflect a detection signal. 3. A fish finder debugging system according to claim 1, wherein the compass is configured to measure an azimuth angle of the crosshair reflector. 4. A fish finder debugging system according to claim 1, wherein the float further comprises a positioning module, which is electrically connected to the communication module, and is configured to wirelessly transmit a position of the cross reflector. 5. A fish finder debugging system according to claim 4, wherein the communication module is configured to wirelessly transmit the azimuth angle of the crosshair reflector. 6. A fish finder debugging system according to claim 1, wherein the onboard communication module can communicate wirelessly with the communication module in the float. 7. A fish finder debugging system according to claim 1, wherein the compensation value solution module calculates a compensation value according to information from the onboard communication module and the onboard positioning module. 8. A fish finder debugging system according to claim 7, wherein the fish finder to be tested is debugged according to the compensation value. 9. A fish finder debugging system according to any one of claims 1 to 8, wherein the rigid panel may be a structural steel panel, and the communication data line may be a waterproof twisted pair line at the water.