一种测量软组织压力的装置:用于人椎间盘和牛肌腱

Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI:10.1109/NEBC.1991.154682

C. C. Johnson, M. Krag, D. Pflaster, L. Haugh, M. Pope

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引用次数: 0

摘要

已开发出一种针式应变式压力传感器，该传感器已被证明既准确又可靠。它是一种电阻应变计，安装在压力膜片上，通过硅胶窗暴露在压力下。换能器用于惠斯通电桥配置，并包含一个假电阻进行温度补偿。传感器电缆还包含一个励磁限压电路，用于保护传感器。作者使用了measurement Group的2100型放大器，以提供3 V直流的激励电压和300的增益。虽然传感器与线性的最大偏差超过5%，但其曲线可以通过二次拟合在0.4%以内。它用于椎间盘内压力测量似乎是非常令人满意的。肌腱和韧带的拉力测量也很好。

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A device for measuring soft tissue pressure: application to human intervertebral disc and bovine tendon

A needle mounted strain gauge pressure sensor has been developed that has proven to be both accurate and reliable. It is a resistive strain gauge mounted on a pressure diaphragm which is exposed to pressure through a silicone window. The transducer is used in a Wheatstone bridge configuration and incorporates a dummy resister for temperature compensation. The transducer cable also contains an excitation voltage limiting circuit for protection of the sensor. The authors used a Measurements Group model 2100 amplifier to provide an excitation voltage of 3 V DC and a gain of 300. Although the sensor's maximum deviation from linearity is over 5%, its curve can be fitted by a quadratic to within 0.4% error. Its use for intradiscal pressure measurements appears to be very satisfactory. Measurement of tendon and ligament tensile force was also good.<>

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Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference

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