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利用射频溅射法用烧结多晶碳化硅靶制取了SiC薄膜热敏电阻器;研究并分析了SiC薄膜从非晶态到晶态的转变过程及有关现象;制取了SiC薄膜温度传感器;对非晶态及晶态SiC薄膜温度传感器的电学性能、热稳定性及热敏特性进行了对比和研究。 相似文献
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文章主要阐述了重离子加速器相幅稳定系统的恒温子系统的硬件设计。首先介绍恒温子系统的组成与工作原理;其次介绍硬件电路设计及相关器件选型,包括热电制冷片的选择、温度传感器的选择、核心控制芯片的选择、风扇检测与控制电路的设计及相关器件选择、电流和电压的检测电路的设计及相关器件选择和功率放大电路的设计;最后论述了恒温子系统的试验测试结果及其分析等。 相似文献
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温度传感器动态性能改进的软测量方法 总被引:1,自引:0,他引:1
在分析温度传感器工作机理的基础上,采用软测量的思想对改善温度传感器动态特性进行了研究。该方法利用热力学基本理论建立温度传感器软测量模型和理论分析测量模型,说明软测量方法提高温度传感器动态特性的原理及可行性,最后用分析解法对模型进行数值求解,给出数值模拟结果。结果表明:软测量方法能够实现由温度传感器测得的温度推算出被测温度,即提高温度传感器动态响应特性,从而扩大常规温度传感器的使用范围,节约成本。 相似文献
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杨双义 《电子制作.电脑维护与应用》2014,(18)
本设计采用8051单片机及外围电路实现药品仓库温度检测功能。系统采用AD590温度传感器来检测药品仓库的实时温度,将安装在药品仓库的温度传感器的温度信号读入8051内,进而由单片机对温度信号进行处理,并控制数码管显示温度,由单片机对采集的温度信号进行判断,对高于或低于警戒线的温度给出报警信号,最后蜂鸣报警电路给出报警声。该论文设计了一套以8051为核心控制器,温度传感器及其外围器件为主要器件的温度监测系统。该系统能够对药品仓库温度进行实时监测,对高于或低于药品仓库温度警戒线的情况进行蜂鸣报警,方便仓库工作人员进行仓库管理。整个设计达到了课题要求,并为以后为进一步开发更为复杂的温度监测系统奠定了基础。 相似文献
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<正> 本文介绍了一种新型的SnO_2半导体陶瓷烧结型乙醇敏感气敏元件,并就提高气敏器件分辨率进行了研究。 研制出的新型酒精敏感器件—MQY1。该器件对乙醇气体有很高的灵敏度,具有选择性好、性能稳定等优点。 该器件采用旁热式烧结工艺结构,以SnO_2 相似文献
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介绍了基于PT100型铂热电阻的测温装置的软硬件设计,并进行了实验验证。该装置采用惠斯通电桥电路采集PT100型铂热电阻的阻值,并将其转换为电压差值;PIC单片机采用分段线性方式将电压差值转换为温度值。实验结果表明,该测温装置测量精度高,误差小,可以快速、准确地测量预埋入PT100型铂热电阻的大型动力设备的内部温度。 相似文献
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防爆柴油机车自动保护装置测温方法研究 总被引:1,自引:1,他引:0
分析了常用的温度监测方法,指出铂热电阻测温方法比较适用于柴油机车自动保护装置的温度监测,并介绍了铂热电阻测温方法的具体实现。该方法根据ADC采样值计算铂热电阻的阻值,并根据铂热电阻与测点温度的关系计算温度值。工业现场应用结果表明,该测温方法反应速度快,在测温范围内特性稳定,长期运行温度无漂移。 相似文献
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由于NTC热敏电阻存在严重的热电非线性问题,使得对应的温度测量电路的设计相对复杂。为此本文根据
NTC热敏电阻的性能参数特点,设计了相应的温度测量电路,并对此温度测量电路在multisim环境中进行了仿真分析,仿真结
果达到电路设计要求。 相似文献
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Prediction of rectal temperature from ear canal temperature. 总被引:2,自引:0,他引:2
Personal heat strain monitoring provides the best means for maximizing worker safety and productivity in hot jobs. The present study compared methods for reducing the environmental effect on aural canal temperature in an attempt to reduce the predictive error of a personal heat stress monitor (QST) and a simple ear thermistor (EAR). Subjects underwent three exposures in impermeable protective clothing (PC) in an environment of 30.1 degrees C wet bulb globe temperature (WBGT) wearing either ear plugs (PLG), ear moulds (MLD) or ear moulds and earmuffs (MFS). Mean work time across all trials was 63.1 +/- 7.9 min, with a mean rectal temperature at 60 min of 38.5 +/- 0.1 degrees C and a sweat production rate of 29.7 +/- 8.6 g/min. Rectal temperature was used as the criterion measure of core temperature. Although group mean predictions were satisfactory, large SD of mean differences (+/- 0.36) meant that predictive ability of QST for individuals was greatly impaired. A simple well-insulated ear thermistor showed slightly better accuracy (+/- 0.28) as a predictor of rectal temperature across time, particularly at peak temperatures. Incorporating the predictive error of aural temperature still extended the duration of safe work times relative to ACGIH guidelines. Further investigation is still necessary to ensure that predictions based on aural temperature are accurate and safe for the worker population across varying conditions. 相似文献
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基于NTC热敏电阻的三种高精度测温系统研究 总被引:3,自引:1,他引:2
针对高精度测温的要求,提出了三种基于NTC热敏电阻的高精度测温系统。分别为恒压式测温系统,恒流式测温系统和双积分式测温系统。从系统构成、测温原理等方面对这三种测温系统进行了分析比较,指出各自特点。 相似文献
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《Ergonomics》2012,55(11):962-972
Personal heat strain monitoring provides the best means for maximizing worker safety and productivity in hot jobs. The present study compared methods for reducing the environmental effect on aural canal temperature in an attempt to reduce the predictive error of a personal heat stress monitor (QST) and a simple ear thermistor (EAR). Subjects underwent three exposures in impermeable protective clothing (PC) in an environment of 30.1°C wet bulb globe temperature (WBGT) wearing either ear plugs (PLG), ear moulds (MLD) or ear moulds and earmuffs (MFS). Mean work time across all trials was 63.1 ± 7.9 min, with a mean rectal temperature at 60 min of 38.5 ± 0.1°C and a sweat production rate of 29.7 ± 8.6 g/min. Rectal temperature was used as the criterion measure of core temperature. Although group mean predictions were satisfactory, large SD of mean differences (±0.36) meant that predictive ability of QST for individuals was greatly impaired. A simple well-insulated ear thermistor showed slightly better accuracy (±0.28) as a predictor of rectal temperature across time, particularly at peak temperatures. Incorporating the predictive error of aural temperature still extended the duration of safe work times relative to ACGIH guidelines. Further investigation is still necessary to ensure that predictions based on aural temperature are accurate and safe for the worker population across varying conditions. 相似文献