5 results about "Swim bladder" patented technology

Provided is a fish size calculation device and method, and a non-transitory computer-readable medium. The target size calculation device includes: a transceiver (22) that transmits a transmission wave to an underwater target and generates an echo signal based on reflection of the transmission wave on the underwater target; a fish tracking unit (25) that tracks a fish among underwater targets over time based on the echo signal due to the different transmission waves; an ultrasonic incidence angle calculation unit (26) that calculates an ultrasonic incidence angle of the transmission wave on the tracked fish for each position of the tracked fish based on the echo signal; a distance calculation unit (27) that calculates a distance between a swim bladder of the tracked fish and a second body part of the tracked fish for each position of the tracked fish based on the echo signal of the tracked fish; and a fish weight calculation unit (30, 901) that calculates a weight of the tracked fish based on the ultrasonic incidence angle and the calculated distance.

Main claim: Fishing lure (1), in particular artificial lure made of elastic material such as rubber, silicone or soft plastic or of plastic or hard material, characterized in that at least one hollow body (2), in particular in the form of a cylinder or a chamber, is arranged inside the lure body, and that the hollow body (2) is connected to the outside of the lure via at least one channel (3). Dependent claims

The invention relates to a device for tracking, position prediction and rescue of victims in an aquatic medium, comprising a physical dummy, which mimics a shipwreck victim and comprises at least one swim bladder for ensuring variable buoyancy at different depths; a digital twin, consisting of a configurable expert system, which controls and operates the cycle life of the dummy in real time, from entry into the water up to rescue, replicating the behaviour of a shipwrecked person; and a communications system, which, when the dummy is submerged, releases to the surface multiple capsules that transmit to the digital twin the GPS position of the dummy and the necessary data to identify the dummy.

This utility model discloses a golden croaker rearing device, relating to the technical field of fish rearing devices. It includes a first rearing pond filled with water for raising golden croakers; a net horizontally arranged within the first rearing pond, capable of moving up and down to drive the golden croakers to the bottom; and a pressurization pipe connected at one end to the first rearing pond and at the other end to a second rearing pond, capable of transporting the water from the first rearing pond to the second rearing pond at a set flow rate and pressure, and transporting the golden croakers from the first pond to the second rearing pond. The golden croaker rearing device provided by this utility model can promote the movement of the golden croaker swim bladder under stress conditions such as water depth, water flow, and water pressure, thereby improving the swim bladder quality and overall fish quality.