Application of Digital Galvanometer Scanner System for CO2 Fractional Laser Safety Improvement
10.12455/j.issn.1671-7104.230568
- VernacularTitle:应用数字振镜系统提高二氧化碳点阵激光治疗仪安全性
- Author:
Ming LI
1
;
Wei FENG
;
Songhua LIU
Author Information
1. 北京市医疗器械检验研究院(北京市医用生物防护装备检验研究中心),北京市,101111
- Keywords:
fractional laser;
galvanometer;
scanning safeguard;
handpiece;
scanning
- From:
Chinese Journal of Medical Instrumentation
2024;48(3):323-329
- CountryChina
- Language:Chinese
-
Abstract:
An analog PID controller-based galvanometer scanner is widely used by fractional laser medical equipment(FLME)to scan lasers across tissue surfaces,achieving the desired therapeutic effect.This type of driver,primarily composed of passive components and operational amplifiers,can only accept commands from the central controller of the FLME,with a simple hardware circuit-based fault diagnosis;thus,the safety of the FLME is compromised.To address these issues,the failure mechanisms of galvanometers and their impact on the safety of FLME are thoroughly analyzed first.Then,an adaptive limit protection method,a coil open circuit fault diagnosis,a communication timeout protection based on two handshakes,and a galvanometer control timeout protection are proposed,respectively,based on a digital driver platform,to supplement the deficiencies in the original fault diagnosis and protection system.This ensures the safety of the FLME.Finally,the effectiveness of the proposed strategies is validated through experiments.
