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題名 | 低造價溶氧感測儀之試作研究=Research of Self-operated Low-cost Dissolved Oxygen Sensor |
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作者 | 侯文祥; 鄭雅元; 陳以容; Hou, Wen-shang; Cheng, Ya-yuan; Chen, I-zon; |
期刊 | 農業工程學報 |
出版日期 | 20080900 |
卷期 | 54:3 2008.09[民97.09] |
頁次 | 頁14-26 |
分類號 | 439.6 |
語文 | chi |
關鍵詞 | 感測器; 溶氧; 電氣化學; 養殖; Sensor; Dissolved oxygen; Electrochemistry; Aquaculture; |
中文摘要 | 在水産生物生産過程,常因多種因素影響,造成池水發生缺氧現象,導致魚類死亡。鑑於因內使用之溶氧感測儀均爲國外進口,僅感測頭的單價即約0.5-2萬元,因此建立一個生産空間之監測系統,如能在購買溶氧感測儀費用減低支出,相對可節約經營成本。本研究自製低造價的溶氧感測信仰。以伽瓦尼電池(Galvanic cell)感測原理之電氣化學反應作爲感測裝置設計基礎,根據氧化環原反應所産生之電壓大小與氧氣濃度成正比,計量空氣或水中的氧氣量。自製溶氧感測器使用銀、鋅金屬材料爲電極組合,透氣莫採用PE保鮮膜,電解液使用KCl□,感測器外穀爲市售塑膠穀,以一般電線作爲電流導線等組合而成。探討電流導線長度、電解液濃度、電解液容量等設計變因與保存等,對溶氣感測儀的靈敏度與老化的速度影響。得知電流導線長度在15m內不影響反應結果:電解液填充17cc的IM KCl□,電壓訊號至少在四個月內可呈穩定反應。製作一個感測器含顯示系統的成本約爲2000元以內。 |
英文摘要 | The process of aquaculture is frequently affected by many factors, that cause oxygen deficit phenomena in the water and lead to death of fish. Since the dissolved oxygen sensor remain high in price, it would cost substantial expenditure to establish a monitoring system for cultivation. Therefore, this research utilizes low cost sensor design and assembly to develop simple and self-operated oxygen dissolving detecting system. The foundation of developing the economical sensor is adoping Galvanic cell. The voltage magnitude and the dissolved oxygen is correlated according to oxidation-reduction reaction. The dissolved oxygen sensor is composed of Ag+Zn electrode, P.E. membrane, KCl solution, plastic shell, and wires. The sensitivity and aging speed of the detecting device may be influence by several factors, including wire length, electrolyte concentration, the capacity of electrolyte, keep method, and so on. It is concluded that the wire length below 15 meters has no influence reaction results; the electrolyte of 1M KCl□ in the sensor with the volume of 17c.c. reached its full efficiency, and the voltage signal would provide stable response over four months. The total cost to fabricate a dissolved oxygen sensor is kept under NT$2000. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。