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Effect of sensor quantity on measurement accuracy of log inner defects by using stress wave 被引量:10

Effect of sensor quantity on measurement accuracy of log inner defects by using stress wave
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摘要 Wood nondestructive testing (NDT) is one of the high efficient methods in utilizing wood. This paper explained the principle of log defect testing by using stress wave, and analyzed the effects of sensor quantity on defect testing results by using stress wave in terms of image fitting degree and error rate. The results showed that for logs with diameter ranging from 20 to 40 cm, at least 12 sensors were needed to meet the requirement which ensure a high testing accuracy of roughly 90% of fitness with 0.1 of error rate. And 10 sensors were recommended to judge the possible locations of defects and 6 sensors were sufficient to decide whether there were defects or not. Wood nondestructive testing (NDT) is one of the high efficient methods in utilizing wood. This paper explained the principle of log defect testing by using stress wave, and analyzed the effects of sensor quantity on defect testing results by using stress wave in terms of image fitting degree and error rate. The results showed that for logs with diameter ranging from 20 to 40 cm, at least 12 sensors were needed to meet the requirement which ensure a high testing accuracy of roughly 90% of fitness with 0.1 of error rate. And 10 sensors were recommended to judge the possible locations of defects and 6 sensors were sufficient to decide whether there were defects or not.
出处 《Journal of Forestry Research》 SCIE CAS CSCD 2007年第3期221-225,共5页 林业研究(英文版)
基金 This paper was supported by the project "Devel-opment of Portable NDT Instrument (2002(39-1))" sponsored by Na-tional Forestry Administrative Bureau of China
关键词 Sensor quantity Log defect testing Stress wave Image fitting degree Sensor quantity Log defect testing Stress wave Image fitting degree
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