Multifunctional motion counting sensor based on friction nano-generator

Abstract

The invention relates to the technical field of motion counting sensors, in particular to a multifunctional motion counting sensor based on a friction nano-generator. When a human body moves, a friction nano-generator collects energy generated by movement and sends out an electric signal; the voltage is judged through a signal detection circuit; the human body motion posture is judged; detected signals 0 and 1 are input into a single-chip microcomputer 1, the single-chip microcomputer 1 transmits the signals to a Bluetooth master module, the Bluetooth master module and a Bluetooth slave moduleachieve wireless communication; the signals are transmitted to a single-chip microcomputer 2 through the Bluetooth slave module; and finally a display screen is controlled to display the walking stepnumber and the running step number respectively. Peripheral circuits of the single-chip microcomputer 1 and the single-chip microcomputer 2 are respectively composed of power supply circuits, crystaloscillators and reset circuits, and the whole system and the display screen are initialized through the reset circuit of the single-chip microcomputer 2. The multifunctional motion counting sensor issimple in structure, excellent in performance and stable in system, and self-energizing is achieved.

Description

technical field [0001] The invention relates to the technical field of motion counting sensors, in particular to a multifunctional motion counting sensor based on a friction nanogenerator. Background technique [0002] A wearable device refers to a portable device that is directly worn on the body or integrated into the user's clothes or accessories. At present, traditional wearable devices are powered by batteries, which requires frequent replacement of batteries, which greatly limits the application of wearable devices. To address this issue, self-powered wearable energy harvesters have received increasing attention. [0003] The counter mainly counts the number of pulses to realize the functions of measurement, counting and control, and also has the function of frequency division. Most of the existing motion counters trigger the pulse signal of the counter through the shaking of a moving part to generate data. Such records are not accurate enough. At the same time, when...

AI Technical Summary

Problems solved by technology

Most of the existing motion counters trigger the pulse signal of the counter through the shaking of a moving part to generate data. Such records are not accurate enough. At the same time, when exercising, the shaking of the counter will affect the movement of the human body and generate noise.

The invention patent with the application number CN201810457579.2 proposes a low-frequency flexible energy harvester and a self-powered motion counter, but its structure is complex and difficult to manufacture, and it only counts the number of motion steps and cannot count the number of walking and running Different motion postures are detected, and there are certain defects

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