Design of Wearable Knee Therapy Instrument System Based on STM32

Red LED irradiation has a good therapeutic effect on knee osteoarthritis, but traditional LED light therapy equipment is bulky and expensive. In order to solve this problem, this paper designs a wearable knee phototherapy instrument system based on STM32, uses Solidworks software to design the three-dimensional structure diagram of the phototherapy instrument, designs the LED array according to Sparrow's law, builds the LED driver circuit with the STM32 single-chip microcomputer as the control core, and finally realizes the different light intensity adjustment control of the flexible LED array board through PWM technology. The results show that the system can realize the linear adjustment of light irradiance, and the heat generation of the light source meets the safety requirements.