用于大容积塞贝克量热计的卷积去噪技术

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
Wu-Shou Zhang
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引用次数: 0

摘要

环境温度波动会影响大容积塞贝克量热计的热噪声和灵敏度。本文提出,仪器中比样品池小很多的参比池可以有效中和这种噪声。研究发现,参考池和样品池的热信号呈现卷积关系。通过对冷却液温度突然变化产生的两个不同的热脉冲(一个来自参考池,另一个来自样品池)进行解卷积,可以得出相应的响应函数。利用这个函数,在等温量热过程中,从样品池的信号中减去参考池的卷积信号,就可以消除噪声。实验证明,在两个热量计(一个容量为 17.6 升,另一个容量为 27 升)上使用这种技术,可分别将噪声从初始值至少降低 5% 和 6%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Convolutional denoising for large-volume Seebeck calorimeter

Convolutional denoising for large-volume Seebeck calorimeter

Ambient temperature fluctuations can affect the thermal noise and sensitivity of a large-volume Seebeck calorimeter. This paper proposes that a reference cell considerably smaller than the sample cell in the apparatus can effectively neutralize this noise. It is found that the thermal signals from both the reference and sample cells exhibit a convolution relationship. By deconvolving two distinct thermal pulses generated by abrupt changes in cooling fluid temperature, one from the reference cell and one from the sample cell, a corresponding response function is derived. And using this function, the noise is canceled out by subtracting the convoluted signal of the reference cell from that of the sample cell during isothermal calorimetry. Experimentally, utilizing this technique with two calorimeters, one with a 17.6-liter capacity and the other with a 27-liter capacity, has been shown to reduce noise by at least 5 % and 6 % from their initial values, respectively.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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