Fishing reel electromagnetic braking device, fishing line and speed measurement mechanism

A fishing reel electromagnetic braking device, applied to a fishing reel having an outlet guide ring and a winding reel, comprising a braking coil and a magnetic braking member rotating integrally with the winding reel, wherein the braking coil is fixedly disposed on a fishing reel body, and the braking coil brakes the winding reel through electromagnetic induction when a line is released, wherein the fishing reel electromagnetic braking device further comprises:

• a guide ring speed measurement mechanism, which is a linear speed sensor disposed at a line outlet of the fishing reel and is configured to detect speed information of a fishing line passing through the outlet guide ring, wherein the fishing line is provided with signal marker sequences arranged at intervals, and the signal marker sequences match geometric parameters of the winding reel, such that interval lengths of the signal marker sequences increase or decrease in proportion to an increase or a decrease of a winding diameter of the fishing line on the winding reel, and a ratio of the interval lengths of the signal marker sequences to the corresponding winding diameter meets a preset value;
• a rotation detection mechanism, which is disposed on the fishing reel body and comprises a rotation speed sensor configured to detect rotation speed information of the winding reel;
• a controller, which is disposed on the fishing reel body and comprises a processor, a memory, and a current control unit, wherein the controller is electrically connected with the guide ring speed measurement mechanism and the rotation detection mechanism, the current control unit is electrically connected with the braking coil, and the memory stores the preset value;
• when the line is released, the controller performs a closed-loop control by the following manner:
• the controller calculates a count of signal markers of the fishing line passing through a line outlet and a rotation angle of the winding reel within the same time period, then calculates a fishing line speed through the outlet guide ring and a tangential speed according to the count of signal markers, the rotation angle of the winding reel, and the preset value to calculate a correction signal for correcting a rotation speed of the winding reel, and controls an electromagnetic induction current in the braking coil through the current control unit according to the correction signal.

A fishing reel electromagnetic braking device, wherein a fishing reel equipped with the fishing reel electromagnetic braking device comprises an outlet guide ring and a winding reel for reeling and releasing a fishing line in a rotation manner, the fishing reel electromagnetic braking device comprises a braking mechanism, and the braking mechanism comprises a braking coil and a magnetic braking member disposed opposite to each other, wherein one of the magnetic braking member and the braking coil rotates integrally with the winding reel to form a rotor, and the other of the magnetic braking member and the braking coil is disposed on a fishing reel body to form a stator, when a line is released, the magnetic braking member and the braking coil rotate relative to each other, and interact with each other to generate electromagnetic induction to brake the winding reel, wherein the fishing reel electromagnetic braking device further comprises:

• a guide ring speed measurement mechanism, which is a linear speed sensor disposed on an inner wall of the outlet guide ring and is configured to detect speed information of the fishing line passing through the outlet guide ring;
• a rotation detection mechanism, which is disposed on the fishing reel body and comprises a main rotation speed sensor and a rotation direction detection device, wherein the rotation detection mechanism is configured to detect the rotation information of the winding reel, and the rotation information comprises information about a rotation pulse and a rotation direction;
• and
• a controller, which is disposed on the fishing reel body and comprises a processor, a memory, a current control unit, and an I/O interface, wherein the controller is electrically connected with the guide ring speed measurement mechanism and the rotation detection mechanism through the I/O interface, the current control unit is electrically connected with the braking coil, and the memory records and stores a conversion relationship parameter between a count of winding turns, a rotation speed, and a tangential speed of the winding reel;
• when the line is released, the controller controls a braking force of the winding reel to realize a closed-loop control in the following manner:
• calculating a fishing line speed through the outlet guide ring according to the speed information;
• calculating the rotation direction, the rotation speed, and the count of winding turns of the winding reel according to the rotation information, wherein the count of winding turns is stored in the memory;
• when the rotation direction of the winding reel is to release the line, calculating the tangential speed according to the count of winding turns, the rotation speed, and the conversion relationship parameter of the winding reel, calculating a correction signal for correcting the rotation speed of the winding reel according to the fishing line speed through the outlet guide ring simultaneous with the tangential speed, and controlling an electromagnetic induction current in the braking coil through the current control unit according to the correction signal.

A speed measurement mechanism, wherein the speed measurement mechanism is a linear speed sensor disposed on an inner wall of an outlet guide ring and is configured to detect speed information of a fishing line passing through the outlet guide ring, wherein the speed measurement mechanism is further provided with a light escape notch disposed on the inner wall of the outlet guide ring, and a detection direction of the linear speed sensor exactly faces the light escape notch, which is implemented in any of the following manners:

• the speed measurement mechanism further comprises a projection light source and a photoelectric sensor, and the fishing line used is spaced by color segments of different reflectivities with a first fixed marker length, wherein the projection light source illuminates the fishing line, the photoelectric sensor converts a detected reflected light signal into an electric pulse signal, and a fishing line speed through the outlet guide ring is measured based on the electric pulse signal and the first fixed marker length;
• or, the speed measurement mechanism further comprises a projection light source and an image sensor, wherein the projection light source illuminates the fishing line, and the image sensor picks up information about local images of the moving fishing line at a fixed time interval, wherein a front-to-back comparison analysis is performed on the local images, and a fishing line speed through the outlet guide ring is calculated based on a distance moved by the local images at the fixed time interval.