Self-adaptive speed regulation circuit of treadmill

Abstract

The utility model provides a treadmill self-adaptive speed regulation circuit, and relates to the field of treadmills, and the treadmill self-adaptive speed regulation circuit comprises a processor, a heart rate detection circuit, a current sampling circuit, a PWM (Pulse Width Modulation) regulation circuit and a Hall position sensor. The current of the motor is sampled through the current sampling circuit, the position of the motor is detected through the Hall position sensor, all detected signals are sent to the processor, then the rotating speed of the motor can be adjusted through the PWM adjusting circuit according to the heart rate and the current through the processor, and when the heart rate is too large, the motor is driven to rotate. The speed of the motor can be reduced, and the safety of a user is guaranteed.

Description

Technical Field

[0001] This application relates to the field of treadmills, and more particularly, to a treadmill adaptive speed regulation circuit. Background Art

[0002] Currently, the speed of a treadmill is generally adjusted manually and cannot be changed according to the user's heart rate. Therefore, the current drive circuit needs to be improved. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a treadmill adaptive speed regulation circuit, which can solve the above technical problems.

[0004] The embodiments of this application provide a treadmill adaptive speed regulation circuit, including a processor, a heart rate detection circuit, a current sampling circuit, a PWM regulation circuit, and a Hall position sensor. The Hall position sensor is installed inside the motor and is electrically connected to the processor. The heart rate detection circuit is used to detect the user's heart rate and send the detected heart rate to the processor. The current sampling circuit is used to detect the drive current of the motor and send the detected current signal to the processor. The PWM regulation circuit is used to adjust the speed of the motor.

[0005] Preferably, two Hall position sensors are provided.

[0006] Preferably, the current sampling circuit includes an amplifier U1, a digital converter U2, resistors R1, R2, R3, R4, and a capacitor C1. One end of the resistor R1 is connected to the eighth interface of the amplifier U1, and the other end of the resistor R1 is connected to the first interface of the amplifier U1. The second and fourth interfaces of the amplifier U1 are both grounded. The third and seventh interfaces of the amplifier U1 are externally connected to a +2.5V power supply terminal. The fifth interface of the amplifier U1 is connected to the second interface of the digital converter U2 through the resistor R2. The sixth interface of the amplifier U1, the first interface of the digital converter U2, and the eighth interface of the digital converter U2 are all externally connected to a 5V power supply terminal. One end of the capacitor C1 is connected to the second interface of the digital converter U2, and the other end of the capacitor C1 is connected to the third interface of the digital converter U2. The third interface of the digital converter U2 is grounded through the resistor R3. The fourth interface of the digital converter U2 is grounded. The fifth and sixth interfaces of the digital converter U2 are both electrically connected to the processor. The seventh interface of the digital converter U2 is electrically connected to the processor through the resistor R4.

[0007] Preferably, the heart rate detection circuit includes a heart rate detection sensor and a processing chip U3, and the heart rate detection sensor is electrically connected to the processor through the processing chip U3.

[0008] Preferably, the model of the processing chip U3 is LM393MODE.

[0009] Preferably, the PWM adjustment circuit includes a processing chip U4, and the model of the processing chip U4 is TL494.

[0010] Preferably, the model of the processor is STM32.

[0011] Advantages of the present utility model:

[0012] An adaptive speed regulation circuit for a treadmill provided by the present utility model includes a processor, a heart rate detection circuit, a current sampling circuit, a PWM adjustment circuit, and a Hall position sensor. The Hall position sensor is installed in the motor and is electrically connected to the processor. The heart rate detection circuit is used to detect the heart rate of the user and send the detected heart rate to the processor. The current sampling circuit is used to detect the driving current of the motor and send the detected current signal to the processor. The PWM adjustment circuit is used to adjust the speed of the motor. The present utility model can detect the heart rate of the user through the heart rate detection circuit, sample the current of the motor through the current sampling circuit, detect the position of the motor through the Hall position sensor, and send the detected signals to the processor. Then, the processor can adjust the rotation speed of the motor through the PWM adjustment circuit according to the magnitude of the heart rate and the magnitude of the current. When the heart rate is too high, the speed of the motor can be reduced to ensure the safety of the user. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is the processor circuit diagram of the present utility model;

[0015] Figure 2 It is the current sampling circuit diagram of the present utility model;

[0016] Figure 3 It is the heart rate detection circuit diagram of the present utility model;

[0017] Figure 4This is the PWM adjustment circuit diagram of the present utility model. Specific embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application that are usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0020] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0024] As Figures 1-4 shown, a treadmill adaptive speed regulation circuit includes a processor, a heart rate detection circuit, a current sampling circuit, a PWM regulation circuit, and a Hall position sensor. The Hall position sensor is installed in the motor, and the Hall position sensor is electrically connected to the processor. The heart rate detection circuit is used to detect the heart rate of the user and send the detected heart rate to the processor. The current sampling circuit is used to detect the drive current of the motor and send the detected current signal to the processor. The PWM regulation circuit is used to regulate the speed of the motor. The present utility model can detect the heart rate of the user through the heart rate detection circuit, sample the current of the motor through the current sampling circuit, detect the position of the motor through the Hall position sensor, and send all the detected signals to the processor. Then, the processor can regulate the rotation speed of the motor through the PWM regulation circuit according to the magnitude of the heart rate and the magnitude of the current. When the heart rate is too high, the speed of the motor can be reduced to ensure the safety of the user.

[0025] In this embodiment, to ensure the accuracy of detection, two Hall position sensors are arranged.

[0026] In this embodiment, the current sampling circuit includes an amplifier U1, a digital converter U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a capacitor C1. One end of the resistor R1 is connected to the eighth interface of the amplifier U1, and the other end of the resistor R1 is connected to the first interface of the amplifier U1. The second interface and the fourth interface of the amplifier U1 are both grounded. The third interface and the seventh interface of the amplifier U1 are externally connected to a +2.5V power supply terminal. The fifth interface of the amplifier U1 is connected to the second interface of the digital converter U2 through the resistor R2. The sixth interface of the amplifier U1, the first interface of the digital converter U2, and the eighth interface of the digital converter U2 are all externally connected to a 5V power supply terminal. One end of the capacitor C1 is connected to the second interface of the digital converter U2, and the other end of the capacitor C1 is connected to the third interface of the digital converter U2. The third interface of the digital converter U2 is grounded through the resistor R3. The fourth interface of the digital converter U2 is grounded. The fifth interface and the sixth interface of the digital converter U2 are both electrically connected to the processor, and the seventh interface of the digital converter U2 is electrically connected to the processor through the resistor R4.

[0027] Specifically, the resistor R1 is a sampling resistor. Current is sampled through the resistor R1, then the signal is amplified by the amplifier U1, then the signal is converted by the digital converter U2, and finally sent to the processor.

[0028] In this embodiment, the heart rate detection circuit includes a heart rate detection sensor and a processing chip U3. The heart rate detection sensor is electrically connected to the processor through the processing chip U3. Specifically, the present utility model detects the heart rate of the user through the heart rate detection sensor, then sends it to the processing chip U3 for processing, and finally sends it to the processor.

[0029] Specifically, the model of the processing chip U3 is LM393MODE.

[0030] In this embodiment, the PWM adjustment circuit includes a processing chip U4. The model of the processing chip U4 is TL494, and the model of the processor is STM32.

[0031] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adaptive speed regulation circuit for a treadmill, characterized in that: It includes a processor, a heart rate detection circuit, a current sampling circuit, a PWM regulation circuit, and a Hall position sensor. The Hall position sensor is installed inside the motor and is electrically connected to the processor. The heart rate detection circuit is used to detect the heart rate of the user and send the detected heart rate to the processor. The current sampling circuit is used to detect the driving current of the motor and send the detected current signal to the processor. The PWM regulation circuit is used to regulate the speed of the motor.

2. The adaptive speed regulation circuit of a treadmill according to claim 1, wherein: There are two Hall position sensors.

3. The adaptive speed regulation circuit of a treadmill according to claim 1, wherein: The current sampling circuit includes an amplifier U1, a digital converter U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a capacitor C1. One end of the resistor R1 is connected to the eighth interface of the amplifier U1, and the other end of the resistor R1 is connected to the first interface of the amplifier U1. The second interface and the fourth interface of the amplifier U1 are both grounded. The third interface and the seventh interface of the amplifier U1 are externally connected to a +2.5V power supply terminal. The fifth interface of the amplifier U1 is connected to the second interface of the digital converter U2 through the resistor R2. The sixth interface of the amplifier U1, the first interface of the digital converter U2, and the eighth interface of the digital converter U2 are all externally connected to a 5V power supply terminal. One end of the capacitor C1 is connected to the second interface of the digital converter U2, and the other end of the capacitor C1 is connected to the third interface of the digital converter U2. The third interface of the digital converter U2 is grounded through the resistor R3. The fourth interface of the digital converter U2 is grounded. The fifth interface and the sixth interface of the digital converter U2 are both electrically connected to the processor. The seventh interface of the digital converter U2 is electrically connected to the processor through the resistor R4.

4. The adaptive speed regulation circuit of a treadmill according to claim 1, wherein: The heart rate detection circuit includes a heart rate detection sensor and a processing chip U3. The heart rate detection sensor is electrically connected to the processor through the processing chip U3.

5. The adaptive speed regulation circuit of a treadmill according to claim 4, characterized in that: The model of the processing chip U3 is LM393MODE.

6. The adaptive speed regulation circuit of a treadmill according to claim 1, characterized in that: The PWM regulation circuit includes a processing chip U4, and the model of the processing chip U4 is TL494.

7. An adaptive speed regulation circuit for a treadmill according to claim 1, characterized in that: The model of the processor is STM32.

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