提出了一种基于DSP的数字化光源温控方案,以适应光纤陀螺油井测斜仪的井下高温工作.方案采用32位TMS320F2812芯片作为控制核心,以脉宽调制(PWM)方式驱动全桥电路.通过分析半导体制冷器TEC的温度动态特性,建立了与之对应的数学模型,设计了PID数字补偿控制算法,实现了数字化的光源温度控制系统.实验结果表明:该温控系统在90℃外界环境温度下,控温精度可以达到±0.03℃,解决了光纤陀螺油井测斜仪的井下高温适应性难题.%To adapt high temperature working condition of the fiber optic gyroscopes inclinometer for well logging,a digital light source temperature control schemes based on DSP was proposed.A 32-bit TMS320F2812 chip was used as control central processor,with pulse width modulation (PWM) to drive the H-bridge circuit.According to analyzing the dynamic temperature characteristics of the thermo-electric cooler(TEC),the mathematical model and the digital PID control algorithm was designed to realize the digital light source temperature control system.Experimental results show that the system can solve the adaptability problem under high temperature,successfully control the temperature of 90 ℃,and achieve the accuracy of ± 0.03℃.
展开▼
