为了实现黑体辐射源实时控制温度的目的,采用纯硬件闭环设计的方法,利用PT100铂电阻温度属性优势,将其转化为电压信号,运用DAC技术将其逆向转换为数据信号,实时反馈黑体辐射源温度,再与温度设置数据信号进行比较,控制黑体辐射源升温或降温,实现黑体辐射源温度的控制.通过对黑体辐射源设置温度、上升时间、调节时间、最终稳定温度等参数进行试验,结果表明,该黑体辐射源在100～600 ℃范围内实时控制精度达到0.5 ℃,升温时间小于150 s.
Design of Real-time Temperature Control Circuit for Blackbody Radiation Source
In this paper,a design scheme circuit is presented to control real-time temperature of blackbody radiation source by taking advantages of the PT100 platinum resistance temperature properties.DAC technology is used to convert them into data signals,and realize real-time closed-loop feedback of temperature.Then the temperature is compared with the setting tempera-ture,and error is used to control the blackbody radiation source to heat up or cool down,realize the temperature control.The parameters such as setting temp erature/rise time/adjust time/final stable temperature of the blackbody radiation source are tested.The experimental results show that the real-time control accuracy of the blackbody radiation source is 0.5 ℃ and the heating time is less than 150 s in the temperature range from 100 ℃ to 600 ℃.
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维普
