传感器不均匀分布对电阻层析成像检测原木内缺陷的影响

Effects of Uneven Distribution on the Sensor within the ERT Defect Detection Logs

为研究传感器平面内的分布对电阻层析成像(ERT)检测原木内部缺陷准确度的影响,以大青杨和杉木原木作为试验材料,改变传感器的分布对原木内部缺陷进行检测,并结合平面几何学和统计学分析实验数据。结果表明:传感器分布的均匀度与图像拟合度呈正相关关系;当均匀度超过0.91时,变异系数小于0.15,图像的拟合度均值达到0.83,所以要提高检测精度需精确均匀布置传感器。

In order to study the distribution of the sensor plane of electrical resistance tomograph（ ERT） log internal defect detection accuracy,with poplar and Chinese fir logs as test material,we changed the distribution of the sensors to log internal defect detection combining with geometry and statistical analysis. Sensors distribution uniformity was related with the fit of the image. When evenness was greater than 0.91,the variation coefficient was less than 0.15,and the fit of the image of the mean value was 0.83. Therefore,laying sensors with uniform arrangement could improve the detection precision.