Exercise amount detection device of power bicycle

Abstract

The utility model discloses an exercise amount detection device of a power bicycle, which comprises a master control terminal, and a middle axle acquisition terminal and a crank acquisition terminal which are in communication connection with the master control terminal, and the middle axle acquisition terminal is used for acquiring exercise amount data at a middle axle of the power bicycle; the crank acquisition terminal is used for acquiring exercise amount data at a crank of the power bicycle, the main control terminal is used for obtaining actual exercise amount data according to the exercise amount data at a middle shaft and the exercise amount data at the crank, and the main control terminal is further in data interaction with the server through the Internet. The physical energy consumption monitoring system has the remarkable effects that the subjects can know indexes such as actual treading speed and exercise amount consumption in real time during exercise, and the comparison between exercise amount data and a time axis is realized, so that the energy consumption conditions of the bodies of the subjects can be known in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of sports scientific research, in particular to an exercise quantity detection device for a power bicycle. Background Art

[0002] With the continuous advancement of modern sports science research, ergometers have become an indispensable tool, widely used for measuring key tests such as maximum oxygen uptake and anaerobic capacity. Currently, internationally recognized, commonly used ergometers can only output basic metrics such as power, heart rate, and speed. However, current sports research demands more precise quantification of exercise volume and real-time data during exercise. Current data such as heart rate and speed measured by ergometers no longer fully meet these requirements. Subjects also cannot obtain real-time information about their actual pedaling speed and energy expenditure during exercise. Furthermore, the development of the internet has enabled cloud-based data storage and analysis. However, existing technologies do not fully utilize this advantage, preventing users from effectively storing their energy data on server platforms. This makes it impossible to compare and analyze energy data against a timeline, preventing users from accurately understanding their physical condition and exercise progress in real time.

[0003] In view of this, the existing exercise volume detection device of the power bicycle has obvious limitations, and there is an urgent need for a new device that can provide more comprehensive exercise volume monitoring, data storage and analysis functions to meet the needs of modern sports research and personal fitness. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an exercise volume detection device for a power bicycle, which can collect and display exercise volume data in real time and share it to a server platform in real time.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows:

[0006] A motion quantity detection device for a power bicycle comprises: a main control terminal, and a central axis acquisition terminal and a crank acquisition terminal communicatively connected to the main control terminal; the central axis acquisition terminal is used to acquire motion quantity data at the central axis of the power bicycle; the crank acquisition terminal is used to acquire motion quantity data at the crank of the power bicycle; the main control terminal is used to obtain actual motion quantity data based on the motion quantity data at the central axis and the motion quantity data at the crank; the main control terminal also exchanges data with a server via the Internet;

[0007] The central axis acquisition terminal includes a first controller, a first strain gauge group, a torque sensor, and a first AD conversion module. The output end of the first strain gauge group is connected to an input end of the first AD conversion module via a first signal amplification circuit, the output end of the torque sensor is connected to the other input end of the first AD conversion module via a second signal amplification circuit, the output end of the first AD conversion module is connected to the output end of the first controller, and the first controller is communicatively connected to the main control terminal via a first communication module.

[0008] The crank acquisition terminal includes a second controller, a second strain gauge group, an acceleration sensor, and a second AD conversion module. The output end of the second strain gauge group is connected to an input end of the second AD conversion module via a third signal amplification circuit, the output end of the acceleration sensor is connected to the other input end of the second AD conversion module via a fourth signal amplification circuit, the output end of the second AD conversion module is connected to the output end of the second controller, and the second controller is communicatively connected to the main control terminal via a second communication module.

[0009] Furthermore, the central axis acquisition terminal further includes a first temperature acquisition module, and the output end of the first temperature acquisition module is connected to the input end of the first controller via the first AD conversion module.

[0010] Furthermore, the first strain gauge group adopts a strain gauge Wheatstone full bridge composed of four strain gauges, and the four strain gauges are arranged on the deformation bridge on the middle axis of the power bicycle.

[0011] Furthermore, the crank acquisition terminal further includes a second temperature acquisition module, and the output end of the second temperature acquisition module is connected to the input end of the second controller via the second AD conversion module.

[0012] Furthermore, the crank acquisition terminal also includes a status indication module, which is used for power-on indication, communication connection indication, and low battery indication.

[0013] Furthermore, the second strain gauge group adopts a strain gauge Wheatstone full bridge composed of four strain gauges, and the four strain gauges are rectangularly arranged in a plane of the crank and symmetrically distributed about the rectangular axis.

[0014] Furthermore, the main control terminal includes a data processing module, to which a third communication module, a storage module and a display module are connected. The third communication module is used to communicate with the central axis acquisition terminal and the crank acquisition terminal. The storage module is used to store the motion data at the central axis, the motion data at the crank, and the actual motion data. The display module is used to display the actual motion data.

[0015] Furthermore, the first signal amplifying circuit and the second signal amplifying circuit have the same circuit structure, and the third signal amplifying circuit and the fourth signal amplifying circuit have the same circuit structure.

[0016] The remarkable effects of the utility model are:

[0017] 1. This device uses a central axis acquisition terminal to collect the motion data at the central axis of the power bicycle, and uses a crank acquisition terminal to collect the motion data at the crank of the power bicycle. The main control terminal calculates the actual motion data based on the motion data at the central axis and the motion data at the crank, displays the calculated actual motion data, and uploads it to the server platform via the Internet in real time. This not only allows users to grasp the changes in motion during exercise, but also realizes the comparison of motion data with the time axis, so as to understand their own body energy consumption status in real time.

[0018] 2. This device adopts the method of synchronous detection of the middle axis and crank positions of the power bicycle, avoiding the deviation of the detection data caused by different detection positions, thereby obtaining more reliable exercise detection results.

[0019] 3. Both the central axis acquisition terminal and the crank acquisition terminal of this device have temperature compensation, which can make the movement data detected by the two more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a structural diagram of the central axis acquisition terminal;

[0022] Figure 3 It is a schematic diagram of the structure of the crank collection terminal;

[0023] Figure 4 is a circuit schematic diagram of a first signal amplifying circuit;

[0024] Figure 5 It is a structural diagram of the master control terminal;

[0025] Figure 6 This is the circuit schematic diagram of the third power supply module. DETAILED DESCRIPTION

[0026] The specific implementation manner and working principle of the present invention are further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1As shown, a motion detection device for a power bicycle includes a main control terminal and a central axis acquisition terminal and a crank acquisition terminal communicatively connected to the main control terminal. The central axis acquisition terminal is used to collect motion data at the central axis of the power bicycle, and the crank acquisition terminal is used to collect motion data at the crank of the power bicycle. The main control terminal is used to calculate the actual motion data based on the motion data at the central axis and the motion data at the crank using a preset calculation program, and the main control terminal also exchanges data with the server through the Internet; it should be noted that the central axis acquisition terminal in this example is arranged at the central axis of the power bicycle, and its installation method can adopt the installation structure disclosed in CN206919905U in the prior art; the crank acquisition terminal is arranged at the crank of the power bicycle, and its installation method adopts the existing mounting method. The main control terminal is installed at the front of the power bicycle for the user to view. This application does not improve the installation method, so it will not be described in detail.

[0028] like Figure 2 As shown, the central axis acquisition terminal includes a first controller, a first strain gauge group, a torque sensor, a first AD conversion module and a first power supply module for powering each of the above modules. The output end of the first strain gauge group is connected to an input end of the first AD conversion module via a first signal amplification circuit, the output end of the torque sensor is connected to the other input end of the first AD conversion module via a second signal amplification circuit, the output end of the first AD conversion module is connected to the output end of the first controller, and the first controller is connected to the main control terminal through a first communication module.

[0029] The torque sensor detects the torque value to obtain the force magnitude, and the first strain gauge group detects the speed value, allowing the power to be calculated based on the speed and force. Under the action of force, the strain gauge outputs a millivolt voltage, which is amplified by the first signal amplification circuit. After the signal is amplified, the analog signal is converted into a digital signal by the AD conversion module and transmitted to the first controller. The first controller then sends the received signal via the first communication module via a wired method. The main control terminal analyzes and processes this data, allowing the subject to understand the actual pedaling speed and power consumption in real time, thereby obtaining actual exercise consumption data.

[0030] In this embodiment, the central axis acquisition terminal also includes a first temperature acquisition module. The output end of the first temperature acquisition module is connected to the input end of the first controller via the first AD conversion module. By collecting the temperature value at the central axis, the detected data is temperature compensated, thereby improving the reliability of the detection result and making the motion data detected by the central axis acquisition terminal more accurate.

[0031] See attached Figure 3 The crank acquisition terminal includes a second controller, a second strain gauge group, an acceleration sensor, a second AD conversion module, and a second power supply module for powering each of the above modules. The output end of the second strain gauge group is connected to an input end of the second AD conversion module via a third signal amplification circuit, the output end of the acceleration sensor is connected to the other input end of the second AD conversion module via a fourth signal amplification circuit, the output end of the second AD conversion module is connected to the output end of the second controller, and the second controller is communicatively connected to the main control terminal via a second communication module.

[0032] The acceleration sensor detects torque to determine force, while the second strain gauge group detects velocity, allowing power to be calculated based on speed and force. Under force, the strain gauge outputs a millivolt-level voltage, which is amplified by the first signal amplification circuit. After amplification, the analog signal is converted to a digital signal via the AD conversion module and transmitted to the second controller. The second controller then transmits the received signal wirelessly via Bluetooth or ANT+ via the second communication module. The main control terminal analyzes and processes this data, allowing the subject to understand the actual pedaling speed and power consumption in real time, thereby obtaining actual exercise consumption data.

[0033] Furthermore, the crank acquisition terminal also includes a second temperature acquisition module, the output end of the second temperature acquisition module is connected to the input end of the second controller via the second AD conversion module, and the temperature value at the crank is collected to perform temperature compensation on the detected data, thereby improving the reliability of the detection result and making the exercise data detected by the crank acquisition terminal more accurate.

[0034] Furthermore, the crank acquisition terminal also includes a status indication module, which is used for power-on indication, communication connection indication, and low power indication, so as to quickly know the working status of the crank acquisition terminal.

[0035] In this embodiment, both the first strain gauge group and the second strain gauge group adopt a strain gauge Wheatstone full bridge consisting of four strain gauges, wherein the four strain gauges in the first strain gauge group are set on the deformation bridge on the middle axis of the power bicycle, and the four strain gauges in the second strain gauge group are rectangularly arranged in a plane of the crank and are symmetrically distributed about the rectangular axis.

[0036] In the implementation of this embodiment, in order to simplify the circuit structure, the circuit structures of the first signal amplifying circuit, the second signal amplifying circuit, the third signal amplifying circuit, and the fourth signal amplifying circuit are consistent. Taking the first signal amplifying circuit as an example, please refer to the attached Figure 4The specific circuit includes an operational amplifier U1, the positive input terminal of the operational amplifier U1 is connected to a DC power supply via a resistor R2, the negative input terminal thereof is connected to the output terminal of the first strain gauge group via a resistor R1 and a capacitor C1, the output terminal of the operational amplifier U1 is connected to the first AD conversion module via a resistor R5, the output terminal of the operational amplifier U1 is further connected to its inverting input terminal via a parallel resistor R3 and a capacitor C2, and the output terminal of the operational amplifier U1 is further grounded via a resistor R4.

[0037] In addition, in this example, the first power module and the second power module both use batteries, so as to reduce the volume of the middle shaft acquisition terminal and the crank acquisition terminal, thereby adapting to installation at the middle shaft and crank of a power bicycle.

[0038] See attached Figure 5 The main control terminal includes a data processing module, to which a third communication module, a storage module, a display module and a third power supply module for supplying power to the above modules are connected. The third communication module is used to communicate with the central axis acquisition terminal and the crank acquisition terminal. The storage module is used to store the motion data at the central axis, the motion data at the crank, and the actual motion data. The data processing module is used to calculate the actual motion data based on the motion data at the central axis and the motion data at the crank using a preset calculation program. The display module is used to display the actual motion data.

[0039] In this embodiment, the third power supply module includes a transformer T1, a rectifier bridge D1, a voltage regulator chip U2, a voltage regulator chip U3, and a step-down chip U4. The primary coil of the transformer T1 is connected to 220V AC power, the two ends of the secondary coil of the transformer T1 are connected to the two input ends of the rectifier bridge D1, the positive output end of the rectifier bridge D1 is connected to the input end of the voltage regulator chip U2, the output end of the voltage regulator chip U2 outputs a positive voltage +VCC, and the negative output end of the rectifier bridge D1 is connected to the input end of the voltage regulator chip U3. The output end of the voltage stabilizing chip U3 outputs a negative voltage -VCC. The output end of the voltage stabilizing chip U2 is also connected to the input end of the step-down chip U4. The output end of the step-down chip U4 is grounded via capacitor C17. The input end of the voltage stabilizing chip U2 is also grounded via capacitors C11 and C13 connected in parallel. The output end of the voltage stabilizing chip U2 is also grounded via capacitor C15. The input end of the voltage stabilizing chip U3 is also grounded via capacitors C12 and C14 connected in parallel. The output end of the voltage stabilizing chip U3 is also grounded via capacitor C16.

[0040] In the above circuit, the 220V AC mains power is stepped down by transformer T1, and then converted into DC power by rectifier bridge D1. After that, the positive and negative voltages output by rectifier bridge D1 are stepped down by voltage regulator chip U2 and voltage regulator chip U3 respectively to power each module in the main control terminal.

[0041] In summary, the present device uses a central axis acquisition terminal to collect motion data at the central axis of a power bicycle, and uses a crank acquisition terminal to collect motion data at the cranks of the power bicycle. The main control terminal calculates the actual motion data (e.g., calculating an average value) based on the motion data at the central axis and the cranks, and displays the calculated actual motion data and uploads it to a server platform via the internet in real time. This not only allows users to grasp changes in motion during exercise, but also enables comparison of motion data with a timeline, thereby providing a more real-time understanding of their own physical energy consumption status. Furthermore, the present device employs a method of synchronously detecting both the central axis and the cranks of the power bicycle, avoiding deviations in the detection data caused by different detection positions, thereby achieving more reliable motion detection results.

[0042] The above is a detailed introduction to the technical solution provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core ideas of the present invention. It should be pointed out that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for detecting the amount of exercise of a power bicycle, characterized in that: The system comprises a main control terminal and a middle axis acquisition terminal and a crank acquisition terminal in communication with the main control terminal. The middle axis acquisition terminal is used to acquire motion data at the middle axis of the power bicycle. The crank acquisition terminal is used to acquire motion data at the crank of the power bicycle. The main control terminal is used to obtain actual motion data based on the motion data at the middle axis and the motion data at the crank. The main control terminal also exchanges data with a server via the Internet. The central axis acquisition terminal includes a first controller, a first strain gauge group, a torque sensor, and a first AD conversion module. The output end of the first strain gauge group is connected to an input end of the first AD conversion module via a first signal amplification circuit, the output end of the torque sensor is connected to the other input end of the first AD conversion module via a second signal amplification circuit, the output end of the first AD conversion module is connected to the output end of the first controller, and the first controller is communicatively connected to the main control terminal via a first communication module. The crank acquisition terminal includes a second controller, a second strain gauge group, an acceleration sensor, and a second AD conversion module. The output end of the second strain gauge group is connected to an input end of the second AD conversion module via a third signal amplification circuit, the output end of the acceleration sensor is connected to the other input end of the second AD conversion module via a fourth signal amplification circuit, the output end of the second AD conversion module is connected to the output end of the second controller, and the second controller is communicatively connected to the main control terminal via a second communication module.

2. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The central axis acquisition terminal further includes a first temperature acquisition module, and the output end of the first temperature acquisition module is connected to the input end of the first controller via the first AD conversion module.

3. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The first strain gauge group adopts a strain gauge Wheatstone full bridge composed of four strain gauges, and the four strain gauges are arranged on a deformation bridge on the middle axis of the power bicycle.

4. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The crank acquisition terminal further includes a second temperature acquisition module, and the output end of the second temperature acquisition module is connected to the input end of the second controller via the second AD conversion module.

5. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The crank acquisition terminal further includes a status indication module, which is used for power-on indication, communication connection indication, and low battery indication.

6. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The second strain gauge group adopts a strain gauge Wheatstone full bridge composed of four strain gauges, and the four strain gauges are arranged in a rectangular shape in a plane of the crank and are symmetrically distributed about the rectangular axis.

7. The exercise amount detection device for a power bicycle according to claim 1, characterized in that: The main control terminal includes a data processing module, to which a third communication module, a storage module and a display module are connected. The third communication module is used to communicate with the central axis acquisition terminal and the crank acquisition terminal. The storage module is used to store the motion data at the central axis, the motion data at the crank, and the actual motion data. The display module is used to display the actual motion data.

8. The exercise amount detection device for a power bicycle according to any one of claims 1 to 7, characterized in that: The first signal amplifying circuit and the second signal amplifying circuit have the same circuit structure, and the third signal amplifying circuit and the fourth signal amplifying circuit have the same circuit structure.

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