Flotherm软件在光纤测井高温电路热设计中的应用

摘要

根据基于PCB设计的实现高温电路的传统法,利用热仿真分析软件对光纤测井电路系统的耐高温性能进行了热设计.首先利用红外热像仪对光纤测井电路系统进行了红外扫描,确定电路系统的主要热源并得到温度场分布,然后根据红外测试所确定的热源,利用热仿真分析软件对光纤测井电路系统进行建模并解算,可得到一定温度下电路系统的热仿真温度场分布,通过对所得到的温度场分布进行分析,进而对电路系统的结构和低功耗设计进行改进,最终提高了整个电路系统的耐温性能.%The thermal design of electronic circiut systerm for fiber logging is performed with the thermal simulation software, according to the traditional method of realizing high-temperature circuits based on the PCB.The electronic circiut system of fiber logging is scanned by an infrared thermal scanner to make sure the main heat sources and to obtain the temperature distribution.The simulation model for the circuit system is established with the thermal simulation software and the main thermal sources obtained by the infrared thermal scanner to gain the temperature distribution of the circuit system at a certain temperature.The structure and power dissipation design of the circuit system were modified on the basis of analysis of the temperature distribution.The high-temperature performance of the system was improved.