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首页> 外文会议>International Symposium on Nondestructive Testing of Wood; 20000913-20000915; Sopron; HU >Development of an electrical impedance spectrometer for the analysis of wood transverse moisture gradient
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Development of an electrical impedance spectrometer for the analysis of wood transverse moisture gradient

机译：开发用于分析木材横向水分梯度的电阻抗光谱仪

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A low-cost impedance spectrometer prototype was developed for the analysis of wood transverse moisture gradient. The measurement of electrical impedance spectrum is based on a sine wave analysis using frequencies below 5 MHz. The equipment consists of a portable PC with an accumulator and electronics connected to a hand-held probe with coaxial and power cables. The equipment can be easily transferred in a small case. Because of the accumulators, no external electricity is needed, and hence, field measurements can be performed. In the measurement, parallel flat electrodes are pressed against the wood specimen. The method is based on modelling the electrical impedance of wood at and below the surface and on using model parameters to estimate the moisture gradient. The equipment and the method have been tested with many types of uniform, desorption and absorption gradients. Lumber, pulpwood, and log speciraes from spruce, pine, and birch have been used in the tests.
机译：开发了一种低成本的阻抗谱仪原型，用于分析木材的横向水分梯度。电阻抗谱的测量基于正弦波分析，使用低于5 MHz的频率。该设备由一台带有累加器的便携式PC和通过同轴电缆和电源线连接到手持式探头的电子设备组成。该设备可以在很小的情况下轻松转移。由于有蓄电池，因此不需要外部电力，因此可以进行现场测量。在测量中，将平行的扁平电极压在木材样本上。该方法基于对木材在表面处和表面以下的电阻抗建模，并使用模型参数来估计水分梯度。该设备和方法已通过多种类型的均匀，解吸和吸收梯度进行了测试。测试中使用了来自云杉，松树和桦树的木材，纸浆材和原木规格。

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