Barbenel J C, Sockalingham S
Bioengineering Unit, University of Strathclyde, Wolfson Centre, Glasgow, UK.
J Biomed Eng. 1990 Nov;12(6):519-22. doi: 10.1016/0141-5425(90)90062-r.
This paper describes the construction and performance of a simple pressure sensing device with a continuous electrical output. It was constructed utilizing a commercially available transducer, an electropneumatic sensor capsule and a 1 m long tube. The transducer used was a piezo-resistive pressure-sensitive device producing an output voltage proportional to the applied pressure. This low cost, high accuracy device is temperature compensated and shows good linearity and negligible hysteresis. The sensor cell has a good thickness-to-diameter ratio and is sufficiently flexible to conform to most contours of the body. The tubing that conveys the pressure transmitting fluid also serves as a means of keeping the transducer distant from the measuring site. The device showed a highly satisfactory performance under laboratory conditions and has proven to be robust and reliable when used for clinical studies.
本文描述了一种具有连续电输出的简单压力传感装置的构造与性能。它是利用一个商用换能器、一个电动气动传感器胶囊和一根1米长的管子构建而成。所使用的换能器是一种压阻式压力敏感装置，产生与施加压力成比例的输出电压。这种低成本、高精度的装置经过了温度补偿，具有良好的线性度且滞后现象可忽略不计。传感器单元具有良好的厚度与直径比，并且足够灵活，能够贴合身体的大多数轮廓。输送压力传递流体的管子还起到使换能器远离测量部位的作用。该装置在实验室条件下表现出非常令人满意的性能，并且在用于临床研究时已证明是坚固可靠的。
