A self-powered system for wearable physiological information monitoring is designed and fabricated.The piezoelectric-photoelec-tric composite energy harvesting device is used to collect the mechanical energy and indoor light energy of the sole of the human body dur-ing movement.Sports shoes are used as the carrier for the composite energy harvesting device,a variety of structural piezoelectric energy harvesters are designed to be fixed on the soles,photoelectric energy harvesters are bonded to the uppers,and the collected energy is stored in supercapacitors.The energy management control circuit with timed and on-demand power supply controls the physiological information monitoring system to be powered on every 20 minutes,and the power is turned off immediately after the measurement.After testing,the av-erage output power of the photovoltaic energy harvesting device in the room from 7:00 am to 7:00 pm reaches 590 μW,and the average output power of the piezoelectric energy harvesting device under the constant speed of walking at 1.2 m/s is over 540 μW.The output power can be stabilized above 1.124 mW,that is,1.349 J of electricity can be produced in 20 minutes.The data acquisition test and power consumption test of each unit of the system are carried out,and it is concluded that the system consumes 1.04 J of energy in one working cycle.From the perspective of energy balance,the physiological information acquisition system using the combined power supply of motion mechanical energy and light energy can achieve self-sustaining timing.It has certain application reference value.
关键词
可穿戴生理信息监测/自供电系统/复合能量收集/能量管理控制电路
Key words
wearable physiological information monitoring/self-powered system/composite energy harvesting/energy management control circuit
维普
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