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首页> 外文会议>International Conference on Advanced Materials Processing Technologies >A NEW SYSTEM FOR MEASURING OXYGEN PERMEATION IN HOLLOW FIBER EXTRA-CORPOREAL OXYGENATORS
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A NEW SYSTEM FOR MEASURING OXYGEN PERMEATION IN HOLLOW FIBER EXTRA-CORPOREAL OXYGENATORS

机译：中空纤维氧渗透的一种新系统，包括氧气氧气

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A new system for measuring oxygen permeation in hollow fiber extra-corporeal oxygenators was developed. The system is based on the use of a membrane electrode sensitive to oxygen and an electric circuit specifically designed to read the current generated by this electrode. The circuit was designed using a high performance operational amplifier and considering several noise sources that can distort the readings. Thermal noise on the resistors was reduced using a low-pass filter. Distortion on the high impedance inputs of the amplifier was prevented surrounding them by a guard pattern. Electromagnetic interference was reduced using coaxial cables in all connections of the circuit, and enclosing the circuit in a box of ferromagnetic material, which acted as a Faraday's cage. The capacitive effect between two parallel tracks of the printed circuit board where the components were mounted was reduced minimizing the length of the tracks and maximizing their distance. Preliminary results show that the circuit's sensibility is close to the required for the system.
机译：开发了一种测量中空纤维超料中氧气中的氧渗透的新系统。该系统基于使用对氧气敏感的膜电极和电路专门设计用于读取该电极产生的电流。该电路使用高性能运算放大器设计，并考虑了几个可以扭曲读数的噪声源。使用低通滤波器还降低了电阻器上的热噪声。防止放大器的高阻抗输入的失真通过保护模式围绕它们。在电路的所有连接中使用同轴电缆减少了电磁干扰，并将电路封闭在一盒铁磁材料中，这充当了法拉第笼。安装部件的两个平行轨道之间的电容效果降低了最小化轨道的长度并最大化它们的距离。初步结果表明，电路的敏感性接近系统所需的敏感性。

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