Double-frequency double-sided rotary scanning fish finder equipment

Abstract

The invention provides double-frequency double-sided rotary scanning fish finder equipment. The double-frequency double-sided rotary scanning fish finder equipment comprises a high-frequency double-sided transmitting and receiving acoustic array and a low-frequency double-sided transmitting and receiving acoustic array, the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are distributed up and down in a crossed manner, and an included angle is formed between a radiating surface normal of the high-frequency double-sided transmitting and receiving acoustic array and a radiating surface normal of the low-frequency double-sided receiving acoustic array. According to the underwater acoustic transducer, the information acquisition rate can be increased, data acquisition errors caused by the sampling rate problem are reduced and avoided, information acquisition content is enriched, and it is ensured that excellent emission sound response and receiving sensitivity are obtained.

Description

Technical Field

[0001] The present invention belongs to the field of hydroacoustic engineering, and specifically relates to a dual-frequency dual-sided rotating scanning fish finder device, and more particularly to a high-precision dual-frequency dual-sided rotating scanning fish finder device used in fish farming to monitor the growth status of fish. Background Art

[0002] At present, hydroacoustic methods have been widely used in fishery resource surveys and assessments. As an important equipment for detecting aquatic organisms, fishery acoustic equipment plays an extremely important role in the accurate exploration, rapid positioning and efficient fishing of fishery resources. Among them, fish finder equipment is a key device in fishery acoustic detection equipment.

[0003] Fishery acoustic equipment can be divided into single-beam system, dual-beam system, split-beam system and multi-beam system based on beam characteristics. Among them, the fish finder hydroacoustic transducer used in single-beam system, dual-beam system and split-beam system is a single-sided design, that is, it can only transmit or receive sound waves in one direction. If you want to obtain fish information within 360° horizontally, you need to perform mechanical rotation for image reconstruction. The speed and accuracy of its mechanical rotation become important factors that restrict the efficiency and accuracy of obtaining aquatic biological information. A single unidirectional transducer can obtain limited information. If the number of transducers is increased, the breeding cost and energy consumption will be greatly increased.

[0004] The fish finder hydroacoustic transducer generally used in the multi-beam system is of cylindrical design, which can achieve 360° detection through beam scanning control. However, this type of transducer is usually a large device installed on large ocean-going vessels. It is large in size and weight, and the manufacturing process is complex and requires high costs. It is not suitable for small-scale and low-cost aquaculture such as pond or box farming.

[0005] In addition, most commonly used fish finders operate at a single frequency, which has great limitations in judging the information contained in the fish school echo. Although the dual-beam fish finder uses dual-frequency technology, it is limited by the structure of the transducer and only uses amplitude or intensity information, without phase information, so the detection information is not comprehensive.

[0006] How to obtain 360° information efficiently and accurately at low cost and small size, improve the speed and efficiency of obtaining fish information, and increase the richness of information acquisition is particularly important for improving aquaculture efficiency, increasing the application of aquaculture information technology, and realizing smart aquaculture monitoring.

[0007] In order to solve the above problems, it is necessary to design a high-precision dual-frequency double-sided rotating scanning fish finder equipment.

[0008] The patent document "Cross-type high-frequency transducer array" with patent number ZL202010796767.5 designs a single-frequency cross-array. The key point is that without designing the transducer into an arc, the cross-array can achieve the superposition of the transmission beams of the two transducer array elements to achieve wide-angle transmission. This allows the transducer to achieve the performance characteristics of wide-angle transmission and planar reception.

[0009] The patent document "A method for realizing a medium-high frequency broadband multi-directional transmitting array" with patent number ZL202110146617.4 designs a multi-directional transmitting transducer array, which can only realize the transmitting function and has low sensitivity and cannot be used as a receiving transducer. In addition, the horizontal beam opening angle of its single transducer array is 22.5°, the beam opening angle is large, and the resolution is poor. If this method is used to improve the resolution, the number of transducer layers needs to be increased, which increases the technical difficulty and production cost.

[0010] The patent document "Omnidirectional underwater acoustic transducer array" with patent application number 202310128544.5 designs an omnidirectional underwater acoustic transducer array to solve the technical problem that long-range and all-round target detection and high-precision imaging of close-range targets cannot be taken into account at the same time in the prior art, but its structure is complex and the cost is relatively high. Summary of the invention

[0011] In view of the defects in the prior art, the object of the present invention is to provide a fish finder equipment with dual-frequency and dual-sided rotation scanning.

[0012] A dual-frequency and dual-sided rotating scanning fish finder device according to the present invention comprises: a high-frequency dual-sided transmitting and receiving acoustic array and a low-frequency dual-sided transmitting and receiving acoustic array;

[0013] The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are distributed up and down and arranged crosswise.

[0014] An angle is formed between the normal line of the radiation surface of the high-frequency double-sided transmitting and receiving acoustic array and the normal line of the radiation surface of the low-frequency double-sided receiving acoustic array.

[0015] Preferably, the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are both double-sided acoustic arrays, and the angle between the normals of the two sides is 180°.

[0016] Preferably, a group of planar high-frequency transmitting transducers 102 and planar high-frequency receiving transducers 103 are respectively provided on the two sides of the high-frequency double-sided transmitting and receiving acoustic array;

[0017] A group of planar low-frequency transmitting transducers 202 and a group of planar low-frequency receiving transducers 203 are respectively provided on the two sides of the low-frequency double-sided transmitting and receiving acoustic array.

[0018] Preferably, a group of high-frequency transmitting transducers 102 and high-frequency receiving transducers 103 on the same side of the high-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam 101, distributed up and down, and integrally potted by polyurethane 002;

[0019] A group of low-frequency transmitting transducers 202 and low-frequency receiving transducers 203 on the same side of the low-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam 201, distributed up and down, and integrally potted with polyurethane 002;

[0020] The hard foam 101 is bonded to the integrally formed transducer tooling structure 001 .

[0021] Preferably, the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are integrally formed, and the functional material is a piezoelectric composite material.

[0022] Preferably, the center frequency of the high-frequency double-sided transmitting and receiving acoustic array is 750kHz, and the center frequency of the low-frequency double-sided transmitting and receiving acoustic array is 1MHz.

[0023] Preferably, the horizontal beam opening angles of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are 0.1° to 5°.

[0024] Preferably, it also includes: a cable connector 3, a transducer fixing structure 4 and a rotating transmission device 5;

[0025] The signal wires led out of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are welded on the cable connector 3, and data signals are transmitted with the rotating transmission device 5 through the cable connector 3;

[0026] The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are rigidly connected to the rotating transmission device 5 via the transducer fixing structure 4 .

[0027] Preferably, the rotation transmission device 5 includes a base 501, an angle sensor 502, a transmission shaft structure 503 and a driving motor 504;

[0028] The transducer fixing structure 4 is connected to the base 501;

[0029] The transmission shaft structure 503 is installed on the base 501;

[0030] The angle sensor 502 is mounted on the transmission shaft structure 503, and the axis of the angle sensor 502 is parallel to the axis of the transmission shaft structure 503;

[0031] The driving motor 504 drives the transmission shaft structure 503 .

[0032] Preferably, the normal angle formed between the radiation surface of the high-frequency double-sided transmitting and receiving acoustic array and the radiation surface of the low-frequency double-sided receiving acoustic array is half of the observation range.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The transducer array in the present invention adopts a double-sided design, which can double the data sampling speed without increasing the mechanical rotation speed, while reducing and avoiding data acquisition errors caused by sampling rate problems.

[0035] 2. The transducer array in the present invention adopts a dual-frequency design. The low-frequency double-sided transducer array can obtain the distance information of the fish school, and the high-frequency double-sided transducer can obtain the information of the fish growth status (such as fish activity, feeding, growth rate, etc.), enriching the content of the information obtained by the fish finder.

[0036] 3. The transmitting transducer and receiving transducer in the present invention are designed independently, which can not only achieve the effect of working simultaneously, but also ensure excellent transmitting acoustic response and receiving sensitivity.

[0037] 4. The high-frequency double-sided transducer array and the low-frequency double-sided transducer array in the present invention are arranged on different planes, that is, a cross array design is performed, which can ensure that no signal interference occurs when the high-frequency double-sided transducer array and the low-frequency double-sided transducer array work at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0039] Figure 1 This is a schematic diagram of the front view structure of a high-precision dual-frequency double-sided rotating scanning fish finder equipment.

[0040] Figure 2 A schematic diagram of the side view structure of a high-precision dual-frequency, dual-sided rotating scanning fish finder.

[0041] Figure 3 This is a schematic diagram of the cross-sectional structure of a low-frequency double-sided transmitting and receiving acoustic array. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] like Figure 1 As shown, a high-precision dual-frequency dual-sided rotating scanning fish finder equipment provided according to the present invention includes a high-frequency dual-sided transmitting and receiving acoustic array, a low-frequency dual-sided transmitting and receiving acoustic array, a cable connector 3, a transducer fixing structure 4 and a rotating transmission device 5.

[0044] like Figure 2 As shown, the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are distributed up and down and cross-arranged, and the normal angle between the radiation surface of the high-frequency double-sided transmitting and receiving acoustic array and the radiation surface of the low-frequency double-sided receiving acoustic array is half of the observation range, and they can work simultaneously. Optionally, the upper and lower relative positions of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array can be exchanged, for example, the low-frequency double-sided receiving acoustic array is located above the high-frequency double-sided transmitting and receiving acoustic array.

[0045] like Figure 3 As shown, the high-frequency double-sided transmitting and receiving acoustic array is a double-sided acoustic array, the vertical angle between the two sides is 180°, and a group of planar high-frequency transmitting transducers 102 and planar high-frequency receiving transducers 103 are respectively provided on the two sides.

[0046] The low-frequency double-sided transmitting and receiving acoustic array is a double-sided acoustic array, the vertical angle between the two sides is 180°, and a group of planar low-frequency transmitting transducers 202 and planar low-frequency receiving transducers 203 are respectively provided on the two sides.

[0047] The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are integrally formed, and the functional material is a piezoelectric composite material.

[0048] Optionally, the center frequency of the high-frequency double-sided transmitting and receiving acoustic array is 750kHz, and the center frequency of the low-frequency double-sided transmitting and receiving acoustic array is 1MHz.

[0049] Optionally, the piezoelectric material of the high-frequency transmitting transducer 102 and the low-frequency transmitting transducer 202 is PZT4.

[0050] Optionally, the piezoelectric material of the high-frequency receiving transducer 103 and the low-frequency receiving transducer 203 is PZT5.

[0051] A group of high-frequency transmitting transducers 102 and high-frequency receiving transducers 103 on the same side of the high-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam 101, distributed up and down, and integrally potted by polyurethane 002. Optionally, the upper and lower relative positions of the high-frequency transmitting transducer 102 and the high-frequency receiving transducer 103 can be exchanged. The hard foam is cut with a groove with the same width as the piezoelectric composite material to fix the piezoelectric composite material; the hard foam is bonded to the integrally formed transducer tooling structure 001.

[0052] A group of low-frequency transmitting transducers 202 and low-frequency receiving transducers 203 on the same side of the low-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam 201, distributed up and down, and integrally potted by polyurethane 002. Optionally, the upper and lower relative positions of the low-frequency transmitting transducer 202 and the low-frequency receiving transducer 203 can be exchanged. Two parallel grooves are cut into the hard foam, and their widths are the same as the widths of the piezoelectric composite materials of the transmitting transducer and the piezoelectric composite materials of the receiving transducer, respectively, to fix the piezoelectric composite materials; the hard foam is bonded to the integrally formed transducer tooling structure 001.

[0053] The width of the piezoelectric composite material is determined according to the required vertical opening angle.

[0054] The horizontal beam opening angles of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array can be optionally 0.1° to 5°, which can be adjusted according to target characteristics such as the type and size of the target to be monitored.

[0055] The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are rigidly fixedly connected to the rotating transmission device 5 through the transducer fixing structure 4 .

[0056] The signal wires led out from the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are welded on the cable connector 3 , and data signals are transmitted with the rotating transmission device 5 through the cable connector 3 .

[0057] The rotation transmission device 5 has a rotation accuracy of 0.1° and includes a base 501 , an angle sensor 502 , a transmission shaft structure 503 and a driving motor 504 .

[0058] The transmission shaft structure 503 is installed on the base 501 .

[0059] The angle sensor 502 is mounted on the transmission shaft structure 503 , and the axis of the angle sensor 502 is parallel to the axis of the transmission shaft structure 503 .

[0060] The driving motor 504 is connected to the transmission shaft structure 503 .

[0061] The above-mentioned example invention involves a high-precision dual-frequency double-sided rotating scanning fish finder equipment, whose underwater acoustic transducer can improve the information acquisition rate, reduce and avoid data collection errors caused by sampling rate problems, enrich the information collection content, and ensure excellent transmission sound response and receiving sensitivity.

[0062] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A dual-frequency double-sided rotating scanning fish finder equipment, characterized in that: include: High frequency double-sided transmitting and receiving acoustic array, low frequency double-sided transmitting and receiving acoustic array; The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are distributed up and down and arranged crosswise. An angle is formed between the normal line of the radiation surface of the high-frequency double-sided transmitting and receiving acoustic array and the normal line of the radiation surface of the low-frequency double-sided receiving acoustic array.

2. The dual-frequency double-sided rotating scanning fish finder equipment according to claim 1, characterized in that: The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are both double-sided acoustic arrays, and the angle between the normal lines of the two sides is 180°.

3. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 2, characterized in that: A group of planar high-frequency transmitting transducers (102) and a group of planar high-frequency receiving transducers (103) are respectively provided on the two sides of the high-frequency double-sided transmitting and receiving acoustic array; A group of planar low-frequency transmitting transducers (202) and a group of planar low-frequency receiving transducers (203) are respectively provided on the two sides of the low-frequency double-sided transmitting and receiving acoustic array.

4. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 3, characterized in that: A group of high-frequency transmitting transducers (102) and high-frequency receiving transducers (103) on the same side of the high-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam (101), distributed up and down, and integrally potted with polyurethane (002); A group of low-frequency transmitting transducers (202) and low-frequency receiving transducers (203) on the same side of the low-frequency double-sided transmitting and receiving acoustic array are bonded to the same piece of hard foam (201), distributed up and down, and integrally potted with polyurethane (002); The hard foam (101) is bonded to the integrally formed transducer tooling structure (001).

5. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 4, characterized in that: The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are integrally formed, and the functional material is a piezoelectric composite material.

6. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 1, characterized in that: The center frequency of the high-frequency double-sided transmitting and receiving acoustic array is 750kHz, and the center frequency of the low-frequency double-sided transmitting and receiving acoustic array is 1MHz.

7. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 1, characterized in that: The horizontal beam opening angles of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided transmitting and receiving acoustic array are 0.1° to 5°.

8. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 1, characterized in that: Also includes: A cable connector (3), a transducer fixing structure (4) and a rotary transmission device (5); The signal wires led out of the high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are welded to the cable connector (3), and data signals are transmitted to the rotary transmission device (5) through the cable connector (3); The high-frequency double-sided transmitting and receiving acoustic array and the low-frequency double-sided receiving acoustic array are rigidly connected to the rotating transmission device (5) via the transducer fixing structure (4).

9. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 8, characterized in that: The rotary transmission device (5) comprises a base (501), an angle sensor (502), a transmission shaft structure (503) and a drive motor (504); The transducer fixing structure (4) is connected to the base (501); The transmission shaft structure (503) is installed on the base (501); The angle sensor (502) is mounted on the transmission shaft structure (503), and the axis of the angle sensor (502) is parallel to the axis of the transmission shaft structure (503); The driving motor (504) drives the transmission shaft structure (503).

10. The dual-frequency dual-sided rotating scanning fish finder equipment according to claim 1, characterized in that: The normal angle formed between the radiation surface of the high-frequency double-sided transmitting and receiving acoustic array and the radiation surface of the low-frequency double-sided receiving acoustic array is half of the observation range.

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