Development of Portable Ion Sensors using Optical Plastic Fiber Sensors

近年来，环境激素、二恶英污染、酸碱度等环境污染问题引起了人们的高度重视。因此，环境测量技术在人类赖以生存的环境中起着重要的作用。传统的pH测量系统完全依靠化学试剂和电极。这些仪器不适合多点或分布式传感。鉴于所有光纤传感器系统都具有易于建立观测网络和可重复使用的特点，为实现无化学反应的多点测量，研制了塑料光纤离子传感器。在这里，我们提出了一种新的光纤化学传感器（FOCS）设计，它具有铅笔形状的远端探针，它由两个塑料光纤（POF）端组成，它们在一个共同的尖端处聚集在一起。荧光染料沿着光纤尖端的芯面固定。这种尖端探针比传统的扁平探针具有更高的荧光检测效率。结果，测定了pH和乙醇浓度。接下来，为了加强传感器的机械强度，防止其被化学反应降解，我们通过光聚合制作了一种芯型。它能抵抗化学反应的侵蚀。得出的结论是，几乎所有最初的预期目标都得到了满足。

Recently much importance has been attached to the problem of environmental pollution such as environment hormone and dioxin pollution, the pH of acid ram. Therefore, environmental measurement techniques play an important role in which human life depends on The conventional pH measurement system depends entirely on chemical reagent and an electrode. These instruments are unsuitable for multipoint or distributed sensing. As all Optical fiber sensor systems are easy to set up observation networks and can be used repeatedly, the plastic optical fiber ion sensors were developed in order to measure multipoints without a chemical reaction.Here, we present a new fiber-optic chemical sensors (FOCS) design with a pencil-shaped distal tip probe, which consists of two plastic optical fiber (POF) ends that come together at a common pointed tip. The fluorescent dyes were immobilized along the core surface of an optical fiber at the tips. This pointed tip probe leads to higher fluorescence detection efficiency than conventional flat tip probes. As the result, pH and ethanol concentration were measured.Next, in order to strengthen the mechanical strength of the sensor and prevent it from degradation by the chemical reaction, we fabricated one core type due to photopolymerization. It was resistant to the erosion by the chemical reaction.It is concluded that almost all of the intended objectives at the beginning were satisfied.