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| 表面应变法无损测量颈椎间盘压强 |
薛清华1,2,原芳2,3,廖振华2,顾洪生4,刘伟强2,3( ) |
2. 深圳清华大学研究院,深圳 518057
3. 清华大学 生物医学工程系,北京 100084
4. 深圳市第二人民医院,深圳518049 |
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| Surface strain gauge method for noninvasive measurements of the cervical disc pressure |
| Qinghua XUE1,2,Fang YUAN3,Zhenhua LIAO2,Hongsheng GU4,Weiqiang LIU1,3() |
1. State Key Laboratory of Tribology, Department of Precision Instrument and Mechanology, Tsinghua University, Beijing100084, China
2. Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
3. Department of Biomedical Engineering, Tsinghua University, Beijing100084, China
4. Shenzhen No. 2 People's Hospital, Shenzhen 518049, China |
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| 文章导读 |
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摘要为了解决现有颈椎间盘髓核压强测量方案在准确性或实施难度方面的局限性,该文提出表面应变无损测量法,即通过在椎间盘表面布置应变片,测量并求解椎间盘内部应变状态和微小运动,搭建椎间盘若干力学性质和具体参数的联系,进而推导出椎间盘内部压强变化情况。通过实验检验和精度标定,该方法的测量误差不超过15%,与有损直接测量方法的标定相关系数为0.79。精度和可重复性较传统测量方法有明显优势,为测量椎间压变化提供了无损伤的新手段。
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| 关键词 ：椎间压,应变,算法,误差分析 |
Abstract：Existing cervical disc pressure measurement methods have limited accuracy. This paper presents a method to measure the pressure without damaging the disc via indirect measurements. The interior strain condition and the tiny motion of the cervical disc are measured by placing a strain gauge on the front surface of the disc. The mechanical property of the disc can then be used to calculate the disc pressure. The tests showed that the measurement error was less than 15% and the correlation coefficient with invasive direct measurements was 0.79. The precision and repeatability of the surface strain method are better than the traditional method. So, this provides a noninvasive way to measure the disc pressure.
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| Key words：disc pressurestrainmeasurement methoderror analyses |
| 收稿日期: 2012-08-16 出版日期: 2015-09-03 |
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| 基金资助:“十二五”国家科技支撑计划资助项目(2012BAI18B05) |
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