Dual-sensor fusion smart elastic band

Abstract

A dual-sensor fusion smart elastic band includes an elastic band body, a pair of handles, a tension sensing unit, an inertial sensing unit, a central processing unit, and a power source. The handles are fixed to both ends of the elastic band body, and one handle forms an accommodating space to house the tension sensing unit, the inertial sensing unit, the central processing unit, and the power source, all located at the end of the elastic band body. These spaces monitor the tension value and phase segmentation identification methods of the elastic band body during operation. The central processing unit calculates the tension value of the elastic band body during operation, as well as the centrifugal mass fraction and tension bearing time of the elastic band body, thereby reducing the error in tension estimation caused by material viscoelasticity and aging.

Claims

1. A dual-sensor fusion smart resistance band, which provides users with instructions for stretching exercises based on an exercise prescription, comprising: An elastic band body, made of an elastic material to form a strip structure with an appropriate tension value, and a fixing part is provided at each of the two ends of the elastic band body; a pair of handles, used to fix to the two ends of the elastic band body respectively, and forming an accommodating space inside one of the handles to cover the fixing part, so as to hold the handles to stretch the elastic band body; a tension sensing unit, located in the accommodating space and at the end of the elastic band body, and the tension sensing unit monitors the elongation of the elastic band body after being stretched, and calculates a tension value that changes with the operation time based on the elongation; an inertial sensing unit, located in the accommodating space, electrically connected to the tension sensing unit, used to identify whether the operation belongs to the centrifugal phase during stretching or the centripetal phase during contraction, as a means of phase segmentation; A central processing unit is disposed in the accommodating space and electrically connected to the tension sensing unit and the inertial sensing unit respectively. The central processing unit calculates a tension value of the elastic band body corresponding to the centripetal and centrifugal phases based on the change in elongation and tension value, and calculates a centrifugal mass fraction and a tension bearing time of the elastic band body; and a power source is disposed in the accommodating space and electrically connected to the tension sensing unit, the inertial sensing unit and the central processing unit respectively to provide the power required for the operation of the above units.

2. The dual-sensor fusion smart elastic band as described in claim 1, wherein, The tension sensing unit includes a tension sensor and an elongation sensor, which are respectively connected to the end of the elastic band body, and the elongation sensor detects the elongation of the elastic band body.

3. The dual-sensor fusion smart elastic band as described in claim 2, wherein, The range of the tension sensor is 0 to 300 N or 0 to 500 N, and its resolution is ≤ 1 N.

4. The dual-sensor fusion smart elastic band as described in claim 2 or 3, wherein, The sampling frequency of the tension sensor is set to 100–500 Hz.

5. The dual-sensor fusion smart elastic band as described in claim 2, wherein, The elongation sensor is selected from one of the following: an optical encoder, a magnetic encoder, or a flexible resistance ruler, and its resolution is ≤0.5 mm.

6. The dual-sensor fusion smart elastic band as described in claim 2 or 5, wherein, The sampling frequency of the elongation sensor is set to 100–500 Hz.

7. The dual-sensor fusion smart elastic band as described in claim 1 further includes a wireless communication unit disposed within the accommodating space and electrically connected to the central processing unit, for transmitting the tension value and the time value obtained by the central processing unit to a mobile device.

8. The dual-sensor fusion smart elastic band as described in claim 1, wherein, The centrifugal quality fraction includes the negative work area, speed stability, jitter caused by acceleration, and range of motion coverage, and is combined with the tension endurance time as a basis for advancing the exercise prescription.

9. The dual-sensor fusion smart elastic band as described in claim 4, wherein, The elastic band system is made of materials such as thermoplastic polyurethane (TPU), thermoplastic elastomer (TPE), or fabric composites, and each fixing part is a metal insert quick-release connector, which facilitates the replacement of the resistance pitch of the elastic band body.

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