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基于ARM7LPC21XX微控制器的高精度标准温度发生器 被引量:2
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作者 董慧 杨景常 范钧 《西华大学学报(自然科学版)》 CAS 2009年第2期17-20,共4页
提出一种基于ARM7LPC21XX微控制器系列的高精度温度发生器的设计方法。它以仪器内的气体温度为被控对象,使之成为温度测试仪的温度参数校准标准;该设备以铂热电阻Pt100为温度传感器,用电阻炉丝作为加热源,并针对设备的非线形误差从... 提出一种基于ARM7LPC21XX微控制器系列的高精度温度发生器的设计方法。它以仪器内的气体温度为被控对象,使之成为温度测试仪的温度参数校准标准;该设备以铂热电阻Pt100为温度传感器,用电阻炉丝作为加热源,并针对设备的非线形误差从软件和硬件两方面进行修正和补偿。通过实验表明,该温度发生器产生的标准温度的测量精度在0-200℃范围内可达到±0.1℃,控制精度可达±0.4℃。 展开更多
关键词 温度发生器 铂电阻 非线形误差 高精度
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高精度温度标定仪
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作者 董慧 王红伟 王利华 《机械与电子》 2010年第S1期211-214,共4页
介绍了一种基于ARM7LPC21XX微控制器系列的高精度温度标定仪,它以仪器内的气体温度为被控对象,使之成为其它温度测试仪的温度参数校准标准;该设备以铂热电阻P_t100为温度传感器,用电阻炉丝作为加热源,并针对设备的非线形误差从硬件和软... 介绍了一种基于ARM7LPC21XX微控制器系列的高精度温度标定仪,它以仪器内的气体温度为被控对象,使之成为其它温度测试仪的温度参数校准标准;该设备以铂热电阻P_t100为温度传感器,用电阻炉丝作为加热源,并针对设备的非线形误差从硬件和软件两方面进行修正和补偿,使之产生的标准温度的测量精度在0℃~200℃内可达到±0.1℃,控制精度可达±0.5℃。 展开更多
关键词 温度标定仪 铂电阻 非线形误差 高精度
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Axisymmetrical Nonlinear Bending and Buckling of a Circular Plate Under Large Load 被引量:2
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作者 侯朝胜 岳燕玲 《Transactions of Tianjin University》 EI CAS 2005年第3期216-222,共7页
With the terms of the exact series solution taken as trial functions, the method of point collocation was used to calculate the large deflection of a circular plate. The axisymmetrical bending formulae were developed ... With the terms of the exact series solution taken as trial functions, the method of point collocation was used to calculate the large deflection of a circular plate. The axisymmetrical bending formulae were developed for the calculation of a circular plate subjected to polynomial distributed loads, a concentrated load at the center, uniform radial forces and moments along the edge or their combinations. The support may be elastic. The buckling load was calculated. Under action of uniformly distributed load, central load or their compound load, solutions were compared with those obtained by other methods. Buckling beyond critical thrust was compared with that calculated by the power series method. The method presented in this paper has advantages of wide convergent range, high precision and short computing time. Moreover, the computing time is nearly independent of the complexity of the loads. 展开更多
关键词 circular plate large deflection BUCKLING compound load method of point collocation
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