孔隙度传感器采用石英晶体和两个激励信号

The 3rd IEEE International Workshop on System-on-Chip for Real-Time Applications, 2003. Proceedings. Pub Date : 2003-07-22 DOI:10.1109/IWSOC.2003.1213042

V. Matko

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引用次数: 0

摘要

为了满足对小体积固体样品(质量约为1g)的孔隙度测量方法的需求，开发了一种使用敏感电容依赖晶体的孔隙度测量传感器。本文介绍了新型传感器和探头的灵敏度、频率对体积的依赖性。此外，还提出了用随机测试信号激励整个传感器的新思路，并给出了孔隙度的测量方法。后者包括测试信号对加权函数不确定性的影响。介绍了火山岩孔隙度测定的实验结果。在10 ~ 30℃的温度范围内，孔隙度测量的不确定度小于0.1%。

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Porosity sensor by using quartz crystals and two excitation signals

In response to a need for a more accurate porosity measuring method for small solid samples (approximately 1 g in mass) the porosity measurement sensor using a sensitive capacitive-dependent crystal was developed. This paper presents the new sensor and the probe sensitivity, frequency dependence on the volume. In addition, the new idea of excitation of the entire sensor with stochastic test signals is described, and the porosity measuring method is provided. The latter includes the influence of test signals on the weighting function uncertainty. The experimental results of the porosity determination in volcanic rock samples are presented. The uncertainty of the porosity measurement is less than 0.1 % in the temperature range 10-30 /spl deg/C.

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The 3rd IEEE International Workshop on System-on-Chip for Real-Time Applications, 2003. Proceedings.

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