Design and experimental validation of strobe stimulation experimental system based on LED dimming
10.19745/j.1003-8868.2023203
- VernacularTitle:基于LED调光的频闪光刺激实验系统设计与实验验证
- Author:
Meng-Hui WANG
1
;
Xiao-Fei WANG
;
Jie REN
;
Yi ZHAO
;
Jian SONG
Author Information
1. 清华大学临床医学院,北京 100084
- Keywords:
LED dimming;
strobe stimulation;
photobiological effect;
electrodermal data;
electrocardiogram data
- From:
Chinese Medical Equipment Journal
2023;44(10):33-37
- CountryChina
- Language:Chinese
-
Abstract:
Objective To design and experimentally validate a strobe stimulation experimental system based on LED dimming.Methods The experimental system consisted of a LED dimming system and a physiological data acquisition system.The LED dimming system was composed of a microprocessor system,a LED driver and a LED,which used pulse-width modulation(PWM)technology to modulate the duty cycle and frequency of the drive current to flexibly control the LED light intensity and flicker frequency;Biopac's 16-channel physiological signal recording and analysis system was used as the physiological data acquisition system.Strobe stimulation experiment was carried out to verify the performance of the system developed.Results The strobe stimulation experiment results showed the system developed could control the LED flicker frequency precisely and acquire the electrodermal data and ECG data of the subjects in real time,and the strobe stimulation resulted in changes of the electrodermal data and ECG data.Conclusion The system developed gains advantages in easy operation and can be used for exploring the photobiological effect of the strobe stimulation.[Chinese Medical Equipment Journal,2023,44(10):33-37]
