Spinning magnetic control variable resistance system and control method thereof

Abstract

The invention discloses a spinning magnetic control variable resistance system and a control method thereof.The spinning magnetic control variable resistance system comprises an execution module, a sensing module, a control module, an external power supply module, a display module and a communication module, the execution module comprises an annular permanent magnet, an electromagnetic coil set and a U-shaped integrated support, and the annular permanent magnet is evenly fixed to the outer wall of a transmission wheel through sixteen permanent magnets with magnetic poles in the same direction; the electromagnetic coil group comprises eight coils which are connected in series in four groups, two coils in each group are symmetrically embedded in the inner side of the U-shaped bracket and are uniformly distributed, the sensing module comprises a seat inner pressure sensor and a Hall sensor which are respectively used for identifying a riding posture and collecting a pulse signal to convert a rotating speed, and the control module comprises a main control unit, a relay and four driving chips. The main control unit is connected with all the modules through wire harnesses, independent on-off and current adjustment of the coil assembly are achieved through the relay and the driving chip, the external power supply module supplies power to all the modules, the communication module is connected with the mobile terminal, and the display module and the mobile terminal synchronously display riding data such as resistance values, postures, rotating speeds and mileages.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spinning, in particular to a spinning magnetic control resistance system and a control method thereof. BACKGROUND

[0002] As a mainstream fitness equipment, the resistance adjustment performance of spinning directly affects the training effect and user experience. The existing magnetic control resistance technology of spinning has the following defects: 1. The resistance adjustment mode is single, and is mostly dependent on manual knob or fixed gear adjustment, which cannot dynamically adapt to the user's riding state (posture, speed), and the training is not targeted; 2. The electromagnetic coil is mostly designed in a whole body, which is easy to overheat during long-term high-power operation, resulting in accelerated coil aging, resistance output drift, and affecting system stability. SUMMARY

[0003] The purpose of the present application is to provide a spinning magnetic control resistance system and a control method thereof to solve the problems in the background art.

[0004] In order to solve the above technical problems, the present application provides the following technical scheme: a spinning magnetic control resistance system, comprising: an execution module, a sensing module, a control module, an external power supply module, a display module and a communication module; The execution module comprises a ring-shaped permanent magnet, an electromagnetic coil group, a U-shaped integrated support, the ring-shaped permanent magnet is composed of 16 permanent magnets uniformly fixed on the outer wall of the transmission wheel, the magnetic pole directions of the 16 permanent magnets are the same, the electromagnetic coil group has 8 coils, which are divided into 4 groups, each group has 2 coils in series, the 4 groups of coils are evenly distributed on the inner side of the U-shaped integrated support with the center of the transmission wheel as the center, and the two coils in each group are symmetrically arranged in the U-shaped integrated support; The sensing module comprises a pressure sensor and a Hall sensor installed in the seat, the pressure sensor is used to detect the seat pressure and identify the riding posture, and the Hall sensor is used to collect the permanent magnet rotation pulse signal to convert the ring-shaped permanent magnet speed; The control module comprises a main control unit, a relay and four drive chips, the main control unit is built-in with a signal amplifier and a filter, the main control unit is signal connected with the communication unit, the relay, the pressure sensor, the Hall sensor, the display module and the communication module through a wire harness, the relay is signal connected with the four drive chips through a wire harness, and the four drive chips are signal connected with the four groups of coils through a wire harness, to realize independent on-off and current adjustment of the coil group; The external power supply module is an external power supply, and the external power supply module is electrically connected with the electromagnetic coil group, the sensing module, the control module, the display module and the communication module through a wire harness; The communication module is used for connecting an external mobile terminal, and the display module and the external mobile terminal are used for displaying cycling data, the cycling data including a resistance value, a cycling posture, a ring-shaped permanent magnet rotating speed and a cycling mileage.

[0005] Further, the U-shaped integrated support is integrally formed of an insulating material, and eight clamping grooves matched with the coils are arranged on the inner side, and two coils in each series are closely embedded in the corresponding clamping grooves, and the distance between the center of the coil and the surface of the ring-shaped permanent magnet is at least 2 mm.

[0006] Further, the communication module is a Bluetooth module or a WiFi module, which supports wireless communication with the external mobile terminal, realizes cycling data transmission and reception of external control instructions.

[0007] Further, the display module is a touch display screen of the spinning bike, and the touch display screen is integrated with a bike control panel, and supports real-time display of the resistance value, the cycling posture, the rotating speed, the cycling mileage and the working state, and supports reception of touch screen control instructions.

[0008] According to the control method of the magnetic control variable resistance system of the spinning bike, the following steps are included: S1: data acquisition and preprocessing: the pressure sensor and the Hall sensor respectively detect the cycling posture and the ring-shaped permanent magnet rotating speed in real time, and feed back the posture and rotating speed information to the main control unit, and the main control unit amplifies and filters the signals through the built-in signal amplifier and filter, and removes the interference noise; The calculation method of the ring-shaped permanent magnet rotating speed is: rotating speed = pulse number × 60 ÷ 16; When each permanent magnet passes through the Hall sensor, it is recorded as a pulse number; S2: double signal fusion decision: the main control unit binds the posture signal and the rotating speed signal at the same time based on the built-in time stamp alignment mechanism, queries the preset posture threshold, rotating speed threshold and resistance mapping table to determine the target resistance, and calculates the target power based on the target resistance; When the pressure sensor detects that the pressure is greater than or equal to the posture threshold, it is determined as a sitting posture, and when the pressure sensor detects that the pressure is less than the posture threshold, it is determined as a standing posture, the rotating speed threshold is divided into three intervals of low speed, medium speed and high speed, and the rotating speed threshold and the posture threshold form a multi-dimensional resistance matching logic, and the resistance mapping table is a correspondence table of the preset posture, rotating speed and target resistance; S3: coil grouping and control: the main control unit dynamically determines the coil grouping number according to the target power, sets the maximum power threshold of a single coil group, then selects the coil group to be started according to the dynamic expansion principle, and sends the on-off instruction to the corresponding driving chip through the relay; The coil grouping number ranges from 1 to 4 groups, and the dynamic expansion follows the order from 1 group to 4 groups without cross-stage switching. S4: Current regulation and resistance execution: the master control unit calculates the target current of each coil group according to the target resistance and the current number of coil groups, adjusts the coil current through the output signal of the drive chip, and controls the start of the corresponding coil group to realize accurate matching of resistance; S5: Data display and instruction response: the master control unit transmits riding data such as resistance value, riding posture, rotating speed, and riding mileage to the display module and external mobile terminal in real time, the communication module receives the control instruction sent by the external mobile terminal, and the master control unit responds to the instruction and adjusts the coil group number or current parameter.

[0009] The beneficial effects achieved by the present application are: 1. Through the cooperative matching of the pressure sensor and the Hall sensor in the sensing module, the user's riding sitting / standing posture and the rotating speed data of the annular permanent magnet can be accurately collected in real time, after signal processing by the master control unit, based on the double signal fusion decision mechanism, combined with the preset posture, rotating speed threshold and resistance mapping table, the target resistance and power are automatically matched, the resistance output can be dynamically adjusted according to the real-time riding state of the user, covering different physical fitness levels and training scene requirements, significantly enhancing the training targeting, while supporting the bidirectional interaction of the external mobile terminal and the touch display screen, taking into account the needs of intelligent automatic adjustment and manual intervention, optimizing the user experience.

[0010] 2. The modular structure of 8 coils arranged in 4 groups independently, rather than the traditional integral coil, cooperates with the positioning of the clamping groove of the U-shaped insulation integrated support, can realize the independent on-off, symmetrical deployment and efficient heat dissipation of the coil group, further, the master control unit classifies the number of coil groups by dynamic expansion principle, avoids long-term high-power operation of single coil group, effectively reduces heat accumulation, reduces the aging speed of the coil and the risk of resistance output drift, at the same time, adjusts the pulse width modulation duty cycle through the drive chip, realizes accurate current control, further guarantees the resistance output precision and system operation stability, prolongs the overall service life of the equipment.

[0011] 3. The signal amplifier and filter built-in the master control unit can effectively remove the interference noise of the sensor acquisition signal, combined with the rotating speed conversion formula and the pulse width modulation duty cycle calculation logic, realizes accurate calculation and rapid adjustment of the resistance value, the resistance error is controllable and the response is timely, at the same time, the system realizes the synchronous display of the riding data to the mobile terminal and the touch display screen through the communication module, supports real-time monitoring and remote instruction issuing of data, convenient operation and high data visualization degree, meets the user's tracking and management needs of training data. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a layout schematic diagram of the dynamic bicycle magnetic control variable resistance system in embodiment one; Figure 2This is a schematic diagram of the signal connection of the magnetically controlled variable resistor system of the exercise bike in Example 1; Figure 3 This is a flowchart of the control method for the magnetically controlled variable resistance system of the exercise bike in Example 2. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings. Example

[0014] like Figures 1-2 As shown, this invention patent discloses a magnetically controlled variable resistance system for a dynamic bicycle, including: an execution module, a sensing module, a control module, an external power supply module, a display module, and a communication module; The execution module includes a ring-shaped permanent magnet, an electromagnetic coil group, and a U-shaped integrated bracket. The ring-shaped permanent magnet consists of 16 permanent magnets uniformly fixed to the outer wall of the transmission wheel. The magnetic poles of the 16 permanent magnets are in the same direction. The electromagnetic coil group has a total of 8 coils, which are divided into 4 groups. Each group has 2 coils connected in series. The 4 groups of coils are evenly distributed inside the U-shaped integrated bracket with the center of the transmission wheel as the center. The two coils in each group are symmetrically arranged inside the U-shaped integrated bracket. The sensing module includes a pressure sensor and a Hall sensor installed in the seat. The pressure sensor is used to detect seat pressure and identify riding posture, and the Hall sensor is used to collect permanent magnet rotation pulse signals to calculate the rotation speed of the ring permanent magnet. The control module includes a main control unit, a relay, and four driver chips. The main control unit has a built-in signal amplifier and filter. The main control unit is connected to the communication unit, relay, pressure sensor, Hall sensor, display module, and communication module via wiring harnesses. The relay has a built-in four-way switch and is connected to the four driver chips via wiring harnesses. The four driver chips are connected to four groups of coils via wiring harnesses, enabling independent switching and current regulation of the coil groups. The external power supply module is an external power source, and it is electrically connected to the electromagnetic coil group, sensing module, control module, display module and communication module respectively through wiring harnesses. The communication module is used to connect to an external mobile terminal. Both the display module and the external mobile terminal are used to display cycling data, which includes resistance value, cycling posture, rotational speed of the ring permanent magnet, and cycling distance.

[0015] Furthermore, the U-shaped integrated bracket is integrally molded from insulating material, and has 8 slots on the inner side that are adapted to the coils. The two coils in each series are tightly embedded in the corresponding slots, and the distance between the center of the coil and the surface of the annular permanent magnet is at least 2mm.

[0016] Further, the communication module is a Bluetooth module or a WiFi module, which supports wireless communication with an external mobile terminal, and realizes transmission of the riding data and reception of external control instructions.

[0017] Further, the display module is a touch display screen of the spin bike, which is integrated with a spin bike control panel, and supports real-time display of the resistance value, the riding posture, the rotating speed, the riding mileage and the working state, and supports reception of touch screen control instructions. Embodiment

[0018] Please refer to Figure 3 According to the control method of the magnetic control variable resistance system of the spin bike, the following steps are included: S1: data acquisition and preprocessing: the pressure sensor and the Hall sensor respectively detect the riding posture and the rotating speed of the annular permanent magnet in real time, and feed the posture and rotating speed information to the main control unit, and the main control unit amplifies and filters the signals through the built-in signal amplifier and filter to remove interference noise; The calculation method of the rotating speed of the annular permanent magnet is: rotating speed / min = pulse number x 60 ÷ 16; Each of the permanent magnets is counted as one pulse number when passing through the Hall sensor; Specific example: 32 pulses per second, rotating speed = 32 x 60 ÷ 16 = 120 rotating speed / min; Preferably, if the pulse number is 0 within 1 second and lasts for 3 seconds, the main control unit determines that it is stopped rotating, and triggers the resistance zero logic.

[0019] S2: dual signal fusion decision: the main control unit binds the posture signal and the rotating speed signal at the same time based on the built-in time stamp alignment mechanism, queries the preset posture threshold, rotating speed threshold and resistance mapping table to determine the target resistance, and calculates the target power based on the target resistance; The pressure sensor determines that it is a sitting posture when the detected pressure is greater than or equal to the posture threshold, and determines that it is a standing posture when the detected pressure is less than the posture threshold, the rotating speed threshold is divided into three intervals of low speed, medium speed and high speed, the rotating speed threshold and the posture threshold form a multi-dimensional resistance matching logic, and the resistance mapping table is a correspondence table of the preset posture, rotating speed and target resistance; Specific example: the posture threshold is set to 5 kg, the rotating speed threshold is divided into low speed 30-80 rotating speed / min, medium speed 80-150 rotating speed / min and high speed 150-200 rotating speed / min, the target power conversion coefficient k = 0.24, and the formula is power = k x resistance; That is: sitting posture + medium speed 100 rpm corresponds to a target resistance of 40 N, power = 0.24 × 40 = 9.6 watts; standing posture + high speed 180 rpm corresponds to a resistance of 85 N, power = 20.4 watts; sitting posture + low speed 60 rpm corresponds to a resistance of 20 N, power = 4.8 watts. The resistance mapping table pre-defines the correspondence between attitude, rotation speed and target resistance, covering the needs of different training scenarios; S3: Coil grouping control: The main control unit dynamically determines the number of coil groups to be engaged based on the target power, sets the maximum power threshold for a single coil group, and then selects the coil group to be started according to the dynamic expansion principle, and sends on / off commands to the corresponding driver chip through relays. The number of coil input groups ranges from 1 to 4 groups, and the dynamic capacity expansion follows the order from 1 to 4 groups without switching across levels. Specific example: Four groups of coils are designated G1, G2, G3, and G4. The resistance range of each group of coils is 2-25 N. The maximum power threshold of a single group of coils is set to 6 watts. When the target power is 9.6 watts, two groups (G1 and G2) are used. When the target power is 20.4 watts, all four groups of coils (G1, G2, G3, and G4) are used. S4: Current Regulation and Resistance Execution: The main control unit calculates the target current for each coil group based on the target resistance and the number of coil groups currently engaged. It then adjusts the coil current by outputting a signal through the driver chip, while simultaneously controlling the start-up of the corresponding coil group to achieve precise resistance matching. The duty cycle of pulse width modulation is calculated using the formula: Duty cycle = (Target resistance ÷ Maximum resistance of a single group) × 100%. Specific example: When two sets of coils are engaged, the target resistance is 40 N, the maximum resistance of a single set is 25 N, the duty cycle is (40 ÷ 50) × 100% = 80%, and the driver chip outputs a pulse width modulation signal with an 80% duty cycle. S5: Data Display and Command Response: The main control unit transmits cycling data such as resistance value, riding posture, speed, and riding distance to the display module and external mobile terminal in real time. The communication module receives control commands sent by the external mobile terminal, and the main control unit responds to the commands and adjusts the number of coil input groups or current parameters.

[0020] This invention utilizes the coordinated operation of pressure sensors and Hall effect sensors in the sensing module to accurately collect real-time data on the user's riding posture (sitting / standing) and the rotational speed of the ring permanent magnet. After signal processing by the main control unit, based on a dual-signal fusion decision-making mechanism and combined with preset posture, rotational speed thresholds, and a resistance mapping table, it automatically matches the target resistance and power. It can dynamically adjust the resistance output according to the user's real-time riding status, covering different fitness levels and training scenarios, significantly enhancing training relevance. It also supports two-way interaction between external mobile terminals and touchscreen displays, balancing intelligent automatic adjustment and manual intervention needs, optimizing the user experience. Furthermore, by employing a modular structure with eight coils arranged in four independent groups, instead of a traditional monolithic coil, and with the slot positioning of the U-shaped insulating integrated bracket, it can achieve independent on / off switching, symmetrical deployment, and efficient heat dissipation of the coil groups. Additionally, the main control unit... The system employs a dynamic capacity expansion principle to progressively increase the number of coil groups, avoiding prolonged high-power operation of a single coil group. This effectively reduces heat accumulation, slows coil aging, and mitigates the risk of resistance output drift. Simultaneously, the driver chip adjusts the pulse width modulation duty cycle to achieve precise current control, further ensuring resistance output accuracy and system stability, and extending the overall lifespan of the equipment. The main control unit incorporates a signal amplifier and filter to effectively remove interference noise from sensor-acquired signals. Combined with the speed conversion formula and pulse width modulation duty cycle calculation logic, it achieves accurate resistance calculation and rapid adjustment, ensuring controllable resistance error and timely response. Furthermore, the system uses a communication module to synchronously display cycling data to mobile terminals and touchscreens, supporting real-time data monitoring and remote command issuance. The system is easy to operate and offers high data visualization, meeting users' needs for tracking and managing training data. The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A magnetic controlled resistance system for a spin bike, characterized in that, The application relates to a dynamic bicycle control system. The execution module comprises a ring-shaped permanent magnet, an electromagnetic coil group and a U-shaped integrated support, the ring-shaped permanent magnet is composed of 16 permanent magnets which are uniformly fixed to the outer wall of a transmission wheel, the magnetic pole directions of the 16 permanent magnets are the same, the electromagnetic coil group comprises 8 coils which are divided into 4 groups, two coils in each group are connected in series, the 4 groups of coils are uniformly distributed on the inner side of the U-shaped integrated support with the center of the transmission wheel as the center, and the two coils in each group are symmetrically arranged in the U-shaped integrated support; The sensing module comprises a pressure sensor and a Hall sensor which are installed in a seat, the pressure sensor is used for detecting seat pressure and identifying a riding posture, and the Hall sensor is used for collecting permanent magnet rotating pulse signals to convert the rotating speed of the ring-shaped permanent magnet; The control module comprises a main control unit, a relay and four driving chips, the main control unit is internally provided with a signal amplifier and a filter, the main control unit is connected with a communication unit, the relay, a pressure sensor, a Hall sensor, a display module and a communication module through wires, the relay is connected with the four driving chips through wires, and the four driving chips are connected with the four groups of coils through wires, so that the independent on-off and current regulation of the coil groups are realized; The external power supply module is an external power supply, and the external power supply module is connected with the electromagnetic coil group, the sensing module, the control module, the display module and the communication module through wires; The communication module is used for connecting an external mobile terminal, the display module and the external mobile terminal are used for displaying riding data, and the riding data comprises a resistance value, a riding posture, the rotating speed of the ring-shaped permanent magnet and a riding distance. The U-shaped integrated support is integrally formed by insulating materials, eight clamping grooves matched with the coils are arranged on the inner side, the two coils connected in series in each group are tightly embedded into the corresponding clamping grooves, and the distance between the center of the coil and the surface of the ring-shaped permanent magnet is at least 2mm.

2. The magnetic controlled resistance system for a stationary bicycle of claim 1, wherein: The communication module is a Bluetooth module or a WiFi module, can support wireless communication with the external mobile terminal, realizes the transmission of the riding data and the receiving of external control instructions.

3. The magnetic controlled resistance system for a stationary bicycle of claim 1, wherein: The display module is a touch display screen of the dynamic bicycle, the touch display screen is internally provided with a bicycle control panel, can support real-time display of a resistance value, a riding posture, a rotating speed, a riding distance and a working state, and can support the receiving of touch screen control instructions.

4. The magnetic controlled resistance system for a stationary bicycle of claim 1, wherein: The application further discloses a dynamic bicycle control method.

5. The control method implemented by the magnetic controlled resistance system of the spinning cycle as claimed in claim 4, characterized in that: S1: data acquisition and pretreatment: a pressure sensor and a Hall sensor are used for real-time detection of a riding posture and the rotating speed of a ring-shaped permanent magnet respectively, and posture and rotating speed information are fed back to a main control unit; the main control unit amplifies and filters signals through an internally provided signal amplifier and a filter, and removes interference noise; S2: double-signal fusion decision: the main control unit binds posture signals and rotating speed signals at the same time based on an internally provided time stamp alignment mechanism, queries preset posture threshold values, rotating speed threshold values and a resistance mapping table to determine a target resistance, and converts a target power based on the target resistance. ​ S3: coil group input control: the master control unit dynamically determines the number of coil input groups according to the target power, sets the maximum power threshold of a single coil group, then selects the coil group to be started according to the dynamic expansion principle, and sends the on-off command to the corresponding drive chip through the relay; S4: current regulation and resistance execution: the master control unit calculates the target current of each coil group according to the target resistance and the current number of coil input groups, adjusts the coil current through the drive chip output signal, and controls the start of the corresponding coil group to realize accurate resistance matching; S5: data display and instruction response: the master control unit transmits the riding data such as resistance value, riding posture, rotating speed, and riding mileage to the display module and external mobile terminal in real time, the communication module receives the control instruction sent by the external mobile terminal, and the master control unit responds to the instruction and adjusts the number of coil input groups or current parameters.

6. The control method of the magnetic controlled resistance system of a spinning cycle according to claim 5, characterized in that: The calculation method of the ring permanent magnet rotating speed in step S1 is: rotating speed = pulse number × 60 ÷ 16; Each permanent magnet passes through a Hall sensor, which is recorded as a pulse number.

7. The magnetic controlled resistance system for a stationary bicycle of claim 5, wherein: In step S2, the pressure sensor detects that the pressure is greater than or equal to the posture threshold to determine the sitting posture, and the pressure sensor detects that the pressure is less than the posture threshold to determine the standing posture. The rotating speed threshold is divided into three intervals of low speed, medium speed, and high speed. The rotating speed threshold and the posture threshold form a multi-dimensional resistance matching logic. The resistance mapping table is a preset corresponding relationship table of posture, rotating speed, and target resistance.

8. The magnetic controlled resistance system for a stationary bicycle of claim 5, wherein: In step S3, the number of coil input groups ranges from 1 to 4 groups, and the dynamic expansion follows the order from 1 group to 4 groups without cross-level switching.

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