基于ADS1248的铂电阻高精度测温装置
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摘要
为了满足医疗低温控制器中对各部位温度测试的需要,设计了一种基于ADS1248的铂电阻高精度测温装置,ADS1248采用外部参考电压测量法,使系统的精度仅依赖于一个高精度参考电阻的阻值,该装置以STM32微控制器为主控芯片,选用的24位ADS1248芯片内部包含增益PGA,恒流源,滤波等降低了该装置的复杂性。通过分段线性插值数据处理,该装置的测量精度能达到±0.01℃,能够满足医疗低温控制器中柜温的测量精度要求。
In order to meet the need of each part temperature of medical cryogenic controller,a high precision temperature measuring device based on ADS1248 was designed.ADS1248 adopted the external reference voltage method to make the precision of the system relies on a high precision reference. The device adopted STM32 as main control chip. The chosen 24 bit ADS1248 chips contain internal gain PGA,constant current source,filter,reducing the complexity of the device. Through testing the linear interpolation,the measuring accuracy of the device can achieve ±0.01 ℃,can satisfy the medical cryogenic temperature controller in the ark of the accuracy of measurement.
In order to meet the need of each part temperature of medical cryogenic controller,a high precision temperature measuring device based on ADS1248 was designed.ADS1248 adopted the external reference voltage method to make the precision of the system relies on a high precision reference. The device adopted STM32 as main control chip. The chosen 24 bit ADS1248 chips contain internal gain PGA,constant current source,filter,reducing the complexity of the device. Through testing the linear interpolation,the measuring accuracy of the device can achieve ±0.01 ℃,can satisfy the medical cryogenic temperature controller in the ark of the accuracy of measurement.
引文
[1]文小玲,易先军,曾涛.高精度温度测控系统[J].仪表技术与传感器,2007(8):46-47,50.
[2]刘培基,王安敏.机械工程测试技术[M].北京:机械工程出版社,2007.
[3]王小丹.基于ADS1148的多路高精度测温装置[J].自动化与仪表,2014,66(3):66-68.
[4]张树青.基于ADS1248高精度测温装置设计[J].河北工业科技,2013,30(4):249-252.
[5]张俊.匠人手记[M].2版.北京:北京航空航天大学出版社,2014.
[6]周立功.ARM嵌入式系统基础教程[M].北京:北京航空航天大学出版社,2005.
[7]朱杰,郭涛.一种Pt100温度传感器的动态热响应模型[J].传感技术学报,2013,26(1):73-77.
[8]张修太,胡雪惠,翟亚芳,等.基于Pt100的高精度温度采集系统设计与实验研究[J].传感技术学报,2010,23(6):812-815.
[9]程建华,罗立成,王鑫哲.高精度温度测量系统的测温补偿算法研究[J].传感器与微系统,2010,29(11):36-39.
[10]徐海松,叶关荣.快速光谱光度计的研制.仪表技术与传感器,1996(10):20-21.
[2]刘培基,王安敏.机械工程测试技术[M].北京:机械工程出版社,2007.
[3]王小丹.基于ADS1148的多路高精度测温装置[J].自动化与仪表,2014,66(3):66-68.
[4]张树青.基于ADS1248高精度测温装置设计[J].河北工业科技,2013,30(4):249-252.
[5]张俊.匠人手记[M].2版.北京:北京航空航天大学出版社,2014.
[6]周立功.ARM嵌入式系统基础教程[M].北京:北京航空航天大学出版社,2005.
[7]朱杰,郭涛.一种Pt100温度传感器的动态热响应模型[J].传感技术学报,2013,26(1):73-77.
[8]张修太,胡雪惠,翟亚芳,等.基于Pt100的高精度温度采集系统设计与实验研究[J].传感技术学报,2010,23(6):812-815.
[9]程建华,罗立成,王鑫哲.高精度温度测量系统的测温补偿算法研究[J].传感器与微系统,2010,29(11):36-39.
[10]徐海松,叶关荣.快速光谱光度计的研制.仪表技术与传感器,1996(10):20-21.