| Sylvatest-Duo装置的探针触式与计示压强对木材超声波测量精度的影响 |
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| 引用本文： | 高珊,王立海,杨冬辉,徐文豪.Sylvatest-Duo装置的探针触式与计示压强对木材超声波测量精度的影响[J].浙江农林大学学报,2016,33(5):875-880. |
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| 作者姓名： | 高珊 王立海 杨冬辉 徐文豪 |
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| 作者单位： | 东北林业大学 工程技术学院, 黑龙江 哈尔滨 150040 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目2572015CA02黑龙江省自然科学基金面上项目C201403 |
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| 摘 要： | 为了提高应用Sylvatest-Duo超声波测量装置进行木材质量和缺陷检测的精度，研究了该装置的探针与木材接触方式（探针触式）及其计示压强对木材中超声波传播速度和信号能量衰减幅度的影响，确定了测量过程中宜采用的最佳探针触式和最佳计示压强。以美国红松Pinus resinosa的小规格试样材（25.4 mm × 25.4 mm × 407.0 mm）为研究对象，采用单因素重复试验，经SPSS统计分析中多元检验的研究结果表明:不同的探针触式对超声波测量结果影响显著（P值为0.000），探针-木材的“持续性接触”比“非持续性接触”测量偏差小，检测效果稳定；在探针“持续性接触”方式下，超声波的传播速度和信号能量衰减幅度随着计示压强增大而增加，在计示压强为275.8 kPa（40 psi）时，两者趋于稳定。因此，建议在应用Slyvatest-Duo进行木材超声波测量过程中，宜保持探针与木材持续性接触，同时采用275.8 kPa的计示压强，可达到最优检测精度。
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| 关 键 词： | 木材科学与技术 Sylvatest-Duo 超声波速度 能量衰减 探针触式 计示压强 美国红松 |
| 收稿时间： | 2015-11-02 |
Probe-wood contact and gauge pressure with Sylvatest-Duo for precision ultrasonic measurements of wood |
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| GAO Shan,WANG Lihai,YANG Donghui,XU Wenhao.Probe-wood contact and gauge pressure with Sylvatest-Duo for precision ultrasonic measurements of wood[J].Journal of Zhejiang A&F University,2016,33(5):875-880. |
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| Authors: | GAO Shan WANG Lihai YANG Donghui XU Wenhao |
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| Affiliation: | College of Engineering & Technology, Northeast Forestry University, Harbin 150040, Heilongjiang, China |
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| Abstract: | To improve precision testing for wood quality and defects when applying the Sylvatest-Duo ultrasound device, the effects of probe-wood contacts and gauge pressure on ultrasonic wave velocity and energy loss with wood were tested. The most optimal mode for probe-wood contact and gauge pressure was determined for wood ultrasonic measurements. A small clean wood sample (25.4 mm × 25.4 mm × 407.0 mm) of American red pine, Pinus resinosa was used as the research object. The effects of different probe-wood contacts and gauge pressures on wood testing performance were examined by employing single factor repeated tests. Multivariate Tests results from SPSS statistical analysis showed that the effect of differences in probe-wood contacts on ultrasonic measurements is significant(P=0.000). The experimental results using sustainable probe-wood contact was more stable-than the continuous probe-wood mode. With sustainable probe-wood contact, ultrasonic wave velocity and energy loss increased as gauge pressure increased, but stabilized at a gauge pressure of 40 psi (275.8 kPa) meaning it was the optimal gauge pressure. Therefore, 40 psi (275.8 kPa) gauge pressure for sustainable probe-wood contact should be used for optimal measurement precision when applying the Sylvatest-Duo device to conduct ultrasonic measurements on wood. |
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