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首页> 外文期刊>Journal of Biomechanics >IN-SITU CALIBRATION OF THE IMPLANTABLE FORCE TRANSDUCER
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IN-SITU CALIBRATION OF THE IMPLANTABLE FORCE TRANSDUCER

机译：植入式力传感器的现场校准

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摘要

Recently, an implantable force transducer (IFT) has been introduced [Xu et al. (1992, J. Biomech. Engng 114, 170-177)] which can be used in tight spaces where force recordings with established transducers, such as the buckle-type transducers, are not possible because of impingement artifacts. The IFT is easily implanted in chronic animal preparations; however, calibration of the IFT in terminal experiments has produced unreliable results. The problems of IFT calibration are that minute movements of the transducer within the tendon, slight misalignments of the tendon, or slight errors in the line of pull cause dramatic changes in the IFT voltage output for a given applied calibration load. Here, we propose a method that eliminates the above calibration problems primarily because the target tendon is left in situ, the calibration loads are applied by the muscles which insert into the target tendon, and the transducer is implanted into the target tendon about two weeks prior to calibration. The theoretical and experimental approaches are demonstrated for the cat patellar tendon, but in principle can be performed with any tendon. The results are repeatable, lie within expected values, and reproduce some of the basic properties which have been observed in prior IFT testing. Copyright (C) 1996 Elsevier Science Ltd. [References: 10]
机译：近来，已经引入了植入式力传感器（IFT）[Xu等人。 （1992，J.Biomech.Engng 114，170-177）]可用于狭窄空间，在狭窄空间中由于碰撞伪像而无法用已建立的换能器如带扣型换能器进行力记录。 IFT很容易植入慢性动物制剂中。但是，在终端实验中对IFT进行校准产生了不可靠的结果。 IFT校准的问题是，在给定的校准负载下，换能器在肌腱内的微小运动，肌腱的轻微错位或拉力线中的微小误差都会导致IFT电压输出的急剧变化。在这里，我们提出一种消除上述校准问题的方法，主要是因为目标肌腱留在原位，校准载荷由插入目标肌腱的肌肉施加，并且换能器大约在两周前植入了目标肌腱进行校准。对猫pa腱进行了理论和实验验证，但原则上可以使用任何腱进行。结果是可重复的，在预期值之内，并且再现了在以前的IFT测试中已经观察到的一些基本特性。版权所有（C）1996 Elsevier Science Ltd. [参考：10]

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