Multifunctional bionic fish structure based on double-joint rigid-flexible mixing and tail fin pushing

By using bionic fish structures with double-joint hard-flexible hybrid, tail fin push and lead screw motor-driven in underwater robots, combined with underwater ultrasonic obstacle avoidance sensors, high propulsion, flexibility and low-cost underwater movement are achieved, solving the lack of flexibility and speed of traditional underwater robots.

CN119749812AActive Publication Date: 2025-04-04ZHEJIANG UNIV OF TECH
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Patent Information

Application Number
CN202510018957.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-04-04
Estimated Expiration
2045-01-07

AI Technical Summary

Technical Problem

Traditional underwater robots rely on complex mechanical propulsion systems, resulting in huge volume, high manufacturing cost, large energy consumption, and insufficient flexibility and mobility in narrow spaces, limiting their practical application.

Method used

A multifunctional bionic fish structure based on double-joint hard-flexible hybrid and caudal fin push is adopted. The tail fin and servo of the laminated plate are driven by magnetically driven by the lead screw motor to change the center of gravity, and an underwater ultrasonic obstacle avoidance sensor is used to achieve independent swimming.

Benefits of technology

It has achieved high propulsion, flexibility, low cost and high swimming speed, solving the problems of poor flexibility, slow swimming speed, difficult preparation and high cost of traditional underwater bionic robots.

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Abstract

The invention discloses a multifunctional bionic fish structure based on double-joint rigid-flexible mixing and tail fin pushing, which comprises a bionic fish main body structure, two underwater obstacle avoidance sensors are symmetrically arranged at the head of the bionic fish main body structure, and a left side clamping device and a right side clamping device are arranged at the rear part of the bionic fish main body structure; the left clamping device is connected with the bionic fish main body structure through a steering engine, the steering engine is fixed to a steering engine fixing frame on the rear portion of the bionic fish main body structure, the two clamping devices are each provided with a tail fin structure, a left permanent magnet and a right permanent magnet are installed on the two sides of each tail fin structure, and a lead screw motor is arranged in the bionic fish main body structure. According to the bionic fish, a double-joint tail fin structure of the bionic fish is achieved by adopting the magnetic drive laminated plate tail fin and the steering engine, the permanent magnets on the two sides of the carbon fiber plate are driven through the solenoids, and then the tail fin structure is driven to swing; the steering engine drives the tail fin clamp to be matched with the solenoid drive laminated plate tail fin to achieve double-joint movement.
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