Intelligent Bluetooth power roller control circuit

Abstract

The utility model discloses an intelligent Bluetooth power roller control circuit which comprises a motion detection module, a data processing module, a display module and a power module. The motion detection module is a high-precision Hall sensor and is used for detecting the motion trail, the rotation frequency and the displacement distance of the power roller in real time; the data processing module adopts a low-power-consumption MCU processor and is based on an ArmCortex-M0 kernel, the dominant frequency is not lower than 48 MHz, and at least 28 GP IO interfaces are configured; the display module is a low-power-consumption LCD (Liquid Crystal Display) screen and is connected with the MCU processor through a driving chip; the MCU processor integrates a Bluetooth communication module, wirelessly transmits motion data to an external terminal device, collects signals through a Cortex-M0 core MCU with a 48 MHz dominant frequency and a 12-bit ADC at a 200 Hz high sampling rate, calculates the motion data in real time and eliminates mechanical vibration interference in combination with a sliding window algorithm and a three-point positioning method, guarantees data real-time performance and accuracy, meanwhile, GPIO interface distribution is clear, and the motion data can be transmitted to the external terminal device in a wireless mode. The circuit structure is clear, and hardware debugging and function expansion are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ab wheel control technology, and in particular to an intelligent Bluetooth ab wheel control circuit. Background Technology

[0002] Traditional ab wheel products generally lack exercise data collection and intelligent interaction functions, making it impossible for users to accurately grasp the training intensity and effect. In addition, most existing ab wheels with counting functions use mechanical counters, which are prone to wear, have low accuracy, and cannot record the movement trajectory.

[0003] Currently, some ab wheels attempt to use photoelectric sensors to detect rotation, but they are greatly affected by ambient light and have a high false trigger rate in complex usage scenarios, making it difficult to meet the intelligent needs of modern fitness equipment. Therefore, an intelligent Bluetooth ab wheel control circuit is proposed here. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art and to achieve the above objectives, the present invention proposes the following technical solution:

[0005] A smart Bluetooth ab wheel control circuit includes:

[0006] Motion detection module, data processing module, display module, and power supply module;

[0007] The motion detection module is a high-precision Hall sensor that detects the motion trajectory, number of rotations, and displacement distance of the ab wheel in real time.

[0008] The data processing module uses a low-power MCU processor based on the Arm Cortex-M0 core, with a main frequency of no less than 48MHz and at least 28 GPIO interfaces.

[0009] The display module is a low-power LCD screen, which is connected to the MCU processor through a driver chip;

[0010] The MCU processor integrates a Bluetooth communication module to wirelessly transmit motion data to external terminal devices.

[0011] Preferably, the high-precision Hall sensor is a linear Hall element that generates a pulse signal through the relative displacement between the magnet and the sensor;

[0012] The MCU processor calculates the motion speed and displacement based on the pulse frequency.

[0013] Preferably, the MCU processor draws less than 5μA in standby mode, dynamically adjusts the main frequency to optimize power consumption during operation, and responds to the signal input of the Hall sensor through a GPIO interrupt wake-up mechanism.

[0014] Preferably, the LCD screen adopts a segment code customized design, and the driver chip communicates with the MCU processor through the SPI interface.

[0015] Preferably, the power module includes a charging management circuit and a lithium battery. The charging management circuit includes a TP4056 chip, which supports 1A constant current charging and overcharge protection.

[0016] Preferably, the GPIO interfaces of the MCU processor are allocated as follows:

[0017] Four interfaces connect to Hall sensor signal input and interrupt trigger;

[0018] Six interfaces drive LCD screen data and control signals;

[0019] Two interfaces connect to the Bluetooth module for UART communication;

[0020] Two interfaces are configured as ADC inputs for monitoring lithium battery voltage.

[0021] This utility model has the following beneficial effects:

[0022] Employing a linear Hall sensor, it generates pulse signals through the relative displacement between the magnet and the sensor, achieving a detection accuracy of ±0.5 revolutions and a displacement error of ≤2%. It can accurately record motion trajectories, rotation counts, and speeds. Compared to traditional mechanical counters or photoelectric sensors, it has strong anti-interference capabilities (such as resistance to strong light and humid environments) and avoids false triggering.

[0023] The MCU uses a 48MHz Cortex-M0 core and a 12-bit ADC to acquire signals at a high sampling rate of 200Hz. Combined with the sliding window algorithm and the three-point positioning method, it calculates motion data in real time and eliminates mechanical vibration interference, ensuring data real-time performance and accuracy. At the same time, the GPIO interface is clearly assigned (4 Hall effect sensors + 6 LCD sensors + 2 Bluetooth sensors + 2 ADC sensors), and the circuit structure is clear, which facilitates hardware debugging and functional expansion. Attached Figure Description

[0024] Figure 1 The first circuit diagram is for a smart Bluetooth ab wheel control circuit proposed in this utility model.

[0025] Figure 2 This is the second circuit diagram of a smart Bluetooth ab wheel control circuit proposed in this utility model.

[0026] Figure 3 This is a block diagram of the control circuit structure for an intelligent Bluetooth ab wheel proposed in this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1:

[0029] like Figure 1-2 As shown, the present invention proposes a smart Bluetooth ab wheel control circuit, comprising:

[0030] The system comprises a motion detection module, a data processing module, a display module, and a power supply module. The motion detection module uses a high-precision Hall sensor to detect the ab wheel's trajectory, number of rotations, and displacement distance in real time. The data processing module employs a low-power MCU processor based on an Arm Cortex-M0 core with a clock speed of at least 48MHz and at least 28 GPIO interfaces. The display module is a low-power LCD screen connected to the MCU processor via a driver chip. The MCU processor integrates a Bluetooth communication module to wirelessly transmit motion data to external terminal devices. The high-precision Hall sensor is a linear Hall element that generates pulse signals based on the relative displacement between the magnet and the sensor. The MCU processor calculates motion speed and displacement based on the pulse frequency. In standby mode, the MCU processor draws less than 5μA of current. During operation, it dynamically adjusts the clock speed to optimize power consumption and responds to Hall sensor signal input via a GPIO interrupt wake-up mechanism. The LCD screen uses a segment code customized design. The driver chip communicates with the MCU processor via an SPI interface. The power supply module includes a charging management circuit and a lithium battery. The charging management circuit includes a TP4056 chip, supporting 1A constant current charging and overcharge protection.

[0031] The GPIO interfaces of the MCU processor are allocated as follows: 4 interfaces are connected to the Hall sensor signal input and interrupt trigger, 6 interfaces drive the LCD screen data and control signals, 2 interfaces are connected to the UART communication of the Bluetooth module, and 2 interfaces are configured as ADC inputs for monitoring the lithium battery voltage.

[0032] In this embodiment, the motion detection module uses SS49E linear Hall elements, with three sets installed at 120° intervals at the ab wheel's axis. The Hall sensors generate a 0.5-4.5V linear voltage signal through the relative displacement between the magnet and the sensor, used to detect the motion trajectory, number of rotations, and displacement distance. The data processing module uses an STM32L071CBT6 microcontroller (based on an Arm Cortex-M0 core, 48MHz clock speed, 28 GPIO interfaces), with four interfaces (PA0, PA1, PA2, PA3) allocated via GPIO to connect to the Hall sensors. It is configured in external interrupt trigger mode to respond to motion signals in real time, and is driven through six interfaces (such as PC5, PC6, PC7, PB4, PB5, PB6) and the SPI protocol. The LCD screen connects to the Bluetooth module's UART communication via two interfaces (such as USART_TX / RX) and monitors the lithium battery voltage via two interfaces (such as ADC1 / ADC2). The display module uses a 1.2-inch segment LCD screen with an HT1621B driver chip. It communicates with the MCU via SPI interfaces (CS, WR, DATA) to display training time, current lap count (accuracy ±0.5 laps), and estimated calories (error <5%). The power module has an 800mAh lithium battery, which uses a TP4056 chip to achieve 1A constant current charging and overcharge protection. A 3.3V LDO chip powers the MCU and peripheral circuits, and the MCU's standby current is <5μA. It responds to Hall sensor signals via a GPIO interrupt wake-up mechanism.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart Bluetooth ab wheel control circuit, characterized in that, include: Motion detection module, data processing module, display module, and power supply module; The motion detection module is a high-precision Hall sensor that detects the motion trajectory, number of rotations, and displacement distance of the ab wheel in real time. The data processing module uses a low-power MCU processor based on the Arm Cortex-M0 core, with a main frequency of no less than 48MHz and at least 28 GPIO interfaces. The display module is a low-power LCD screen, which is connected to the MCU processor through a driver chip; The MCU processor integrates a Bluetooth communication module to wirelessly transmit motion data to external terminal devices.

2. The intelligent Bluetooth ab wheel control circuit according to claim 1, characterized in that, The high-precision Hall sensor is a linear Hall element that generates pulse signals through the relative displacement between the magnet and the sensor. The MCU processor calculates the motion speed and displacement based on the pulse frequency.

3. The intelligent Bluetooth ab wheel control circuit according to claim 1, characterized in that, The MCU processor draws less than 5μA in standby mode, dynamically adjusts the main frequency to optimize power consumption during operation, and responds to the signal input of the Hall sensor through the GPIO interrupt wake-up mechanism.

4. The intelligent Bluetooth ab wheel control circuit according to claim 1, characterized in that, The LCD screen adopts a segment code customized design, and the driver chip communicates with the MCU processor through the SPI interface.

5. The intelligent Bluetooth ab wheel control circuit according to claim 1, characterized in that, The power module includes a charging management circuit and a lithium battery, and the charging management circuit includes a TP4056 chip.

6. The intelligent Bluetooth ab wheel control circuit according to claim 1, characterized in that, The GPIO interface allocation of the MCU processor is as follows: Four interfaces connect to Hall sensor signal input and interrupt trigger; Six interfaces drive LCD screen data and control signals; Two interfaces connect to the Bluetooth module for UART communication; Two interfaces are configured as ADC inputs for monitoring lithium battery voltage.

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