Abstract: An array of optical fibers can be applied to smart skinsensing applications, which include stress monitoring,fatigue detection, temperature sensing, etc. Although asingle light source can be used in a fiber arraysensor, the input light power is divided by a sensingfiber array and each fiber may require a detector. Thusas the channel number of a fiber array increases, thenumber of detectors also increases and the signalintensity of each fiber channel decreases, whichdecreases the signal-to-noise ratio and increases thecomplexity and the cost of the system. In this paper,we analyze the Hadamard transform to enhance the signalprocessing of the fiber array sensor. The apparentadvantages are: only one detector is needed and thesignal-to-noise ratio of the fiber array sensor can beimproved by a factor of $ROOT@N/2, where N is thenumber of sensing fibers. Analysis for an array of 127sensing fibers is illustrated, in which we have shownthat the calculated results are in agreement with theanalytical model. !4
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机译：摘要：光纤阵列可应用于智能皮肤传感应用，包括应力监测，疲劳检测，温度传感等。尽管单个光源可用于光纤阵列传感器，但输入光功率除以传感光纤阵列每根光纤可能需要一个检测器。因此，随着光纤阵列的通道数增加，检测器的数量也增加，并且每个光纤通道的信号强度减小，这降低了信噪比并增加了系统的复杂性和成本。在本文中，我们分析了Hadamard变换以增强光纤阵列传感器的信号处理能力。明显的优点是：仅需要一个检测器，并且光纤阵列传感器的信噪比可以提高$ ROOT @ N / 2倍，其中N是传感光纤的数量。举例说明了对127条传感光纤的分析，结果表明计算结果与分析模型相符。 ！4
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