Design and Fabrication of Optical Fiber Weight Sensors

[[abstract]]本論文所提出之光纖體重感測器，顧名思義為量測人體體重而設計，是以單模光纖（Single mode fiber SMF）利用彎曲損耗作為感測元件，並使用SC-877翻模矽膠作為感測的介質，經單模光纖所製成最適合曲率半徑之感測元件，加上最佳硬度之翻模矽膠主劑與硬化劑調配比例為100：1 33來做成感測器之彈性膠體。本論文在設計光纖體重感測器，除了改變製作光纖感測元件的結構，並比較光纖在有保護套及沒有保護套之情況下，探討是否對量測值有影響。實驗將砝碼施加重量於光纖體重感測器上，比較改變不同光纖結構與有保護套及沒有保護套，並量測光纖之損失光功率量，從結果顯示發現體重之量測範圍可達0 ~ 125 公斤。 本文之光纖體重感測器，藉由重量使彈性膠體形變，改變包覆在膠體光纖之彎曲半徑，測得造成損失之光功率量，並對應到公斤數與理論公式的結果一致，此感測器具有穩定性及重複性，且與市售之體重機比較，其製作結構簡單、成本低廉。[[abstract]]This thesis proposed the fiber optical body weight scale sensor As the name implies it is designed for the measurement of body weight The optical sensor utilizes the principle of bending loss using single-mode fiber (SMF) as a sensing assemble and the SC-877 silicone as the sensing medium After production of the sensor probe by single-mode fiber makes it the most appropriate radius of curvature Plus the hardness of the best material for elastic gel sensors is mixed with the main base and hardener with the ratio of 100:1 33 The purpose of this thesis is to design the optical fiber body weight sensors An additional aspect in this study was changing the production structure of the optical fiber sensor probe Comparisons between the fiber under the protection sleeve and the fiber with no protective sleeve were studied in order to determine the influence between the measured values The impact of weight on the optical fiber body weight sensors was also studied to compare the changing value of the fiber structure with the protective sleeve and no protective sleeve Also measures the amount of power loss in the optical fiber Results showed that the amount of the body weight measurement range is between 0 to 125 kg The fiber-optic body weight sensors in this article use elastic colloidal deformation by weight to change the bend radius in the colloid coated optical fiber Experimental results corresponds of the theoretical formula kilograms is consistent and compare to commercial body weight sensor the proposed sensor has simple and stable structure that can be made easily and with low cost