【摘要】 为获得连续可调谐高频微波信号,设计了一种基于单片机控制的高精度热电制冷器(TEC)温度控制系统。该系统的控制芯片采用MSP430F149单片机,通过温度传感器TMP112进行温度信息的采集,驱动电路产生的脉宽调制(PWM)波信号驱动TEC芯片进行温度控制,稳态误差约为0.06℃。利用该温度控制器控制光纤的温度,通过调节温度获得了10.872~10.905 GHz的高频微波信号,信号频移大小的斜率为1.1 MHz/℃。增加控制系统的温度调谐范围可获得更宽调谐范围的微波信号。更多还原

【Abstract】 In order to obtain continuous tunable high-frequency microwave signals,a high precision thermoelectric cooler(TEC) temperature control system is designed based on microcontroller.MSP430F149 is used as the control chip of the system.TMP112,a digital temperature sensor,is used to collect temperature information,and the temperature can be controlled by TEC chip driven by the pulse width modulation(PWM)signal from driven circuit.The steady error is about 0.06℃.The optical fiber temperature is controlled by the temperature controller,and the high-frequency microwave signal from 10.872 GHz to 10.905 GHz is obtained by adjusting the temperature.The signal frequency shift magnitude slope is about 1.1 MHz/℃.A wider range of microwave signals can be obtained by increasing temperature tunig range of the control system.更多还原