Objective To explore the key factors affecting the stable power output of a semiconductor laser therapy instrument based on a polarization-maintaining fiber temperature sensor and to investigate practical reliability analysis methods for optoelectronic devices in laser therapy system.Methods Based on the reliability block diagram method,reliability(RSL),failure rate(λSL)and average life(LSL)analysis models were established for the optoelectronic devices and their peripheral circuits of the system.The impact of operating environment,operating time(t)and working temperature(T)on the reliability of the system were analyzed.Based on the accelerated life model,the relationships between LSL and T,I,and the interaction between T and I were tested under conditions of room temperature high current(T=25℃,I=2.5 A),high temperature operating current(T=50℃,I=1.5 A),and high temperature high current(T=50℃,I=2.5 A).Results The simulation results showed that λSL increased with the increase of T,LSL decreased with the increase of T,RSL decreased with the increase of T and t.Under the condition of I=1.5 A and T=50℃,the estimated values of λSL,LSL and RSL were 5.229×10-5 1/h,17824.500 h and 0.11418 respectively.The experimental results show that the LSL were 22873,17693 and 4780 h respectively,and the experimental test results were basically consistent with the simulation results.Conclusion Based on the method proposed in this study,by combining system architecture,design methods,and usage environment,it is possible to analyze and calculate whether the λSL of the equipment meets the usage standards,which can further predict the RSL and LSL of the equipment,providing data support for design,manufacturing,and clinical use.
关键词
半导体激光治疗仪/光纤温度传感器/可靠性框图/加速寿命实验/可靠性
Key words
semiconductor laser therapy instrument/fiber optic temperature sensor/reliability block diagram/accelerated life experiments/reliability
维普
万方数据