無線射頻技術於森林樣區調查之效能評估

Estimating the RFID Technology Potency in a Forest Survey Sampling

近年來無線射頻技術發展日趨成熟，各領域紛紛將其導入以支援經營管理工作。台灣森林區域範圍廣大且地處偏遠，進行調查常需花費大量人力與物力，且易產生人為誤差，若能利用RFID技術輔助，預估能有效提高森林資源調查之效率。本研究以恆春事業區第36林班之120株毛柿母樹為試驗調查對象，利用2組不同規格的電子標籤（Tag 501w, ABS Stick Tag）與2組不同規格的PDA（HP iPAQh 2790C, CPT 9400CE）搭配成4組RFID設備進行試驗，除記錄資料讀寫距離及時間外，並以統計分析探討其效能差異；另每次調查時同時記錄DA在實際操作上電量耗損之情況，並觀察電子標籤損壞狀況。研究結果顯示，資料讀取以790C型PDA配BS子標籤效能最好，其讀取距離為2.86cm，讀取時間為0.76s；PDA電量耗損方面，9400CE型之電力消耗狀況高於2790C型；此外，電子標籤設置於林下一個月後，已有兩個無法正常讀取，並有少部份外表有木屑及土壤覆蓋，顯見無線射頻技術應用於森林資源調查作業，尚可能受到許多不確定因子影響，因此仍需長時間進行重複性觀測，以提高其評估精度。 With the development of RFID (Radio Frequency Identification) technology, many application domains have applied the technology to support the routine operations. The ranges of forest in Taiwan are wide and inconvenient; it needs a great amount of labors and materials to proceed to the forest resource survey. In addition, manual records would easily produce mistakes. FRID was predicted that they can effectively promote forest resource survey with to assisting investigator. This study used 120 trees of Diospyros philippensis (Desr.) Gurke as a survey target that was located in the 36th compartment of Hengchun working circle. Used two different types of Tag equipments (Tag 501w, ABS Stick Tag) with two different types of PDA (HP iPAQh 2790C, CPT 9400CE) to make up The four different types of RFID equipments would be evaluated by the effective power of distance and time, and statistical analysis would be used in this research. PDA at the same time each survey recorded in the actual operation of power loss, and to observe the damage status of electronic tags. The results showed that reading effectiveness of 2790C PDA and ABS electronic labels information is the best. It could reach about 2.86 cm and the reading off time was 0.76s. The power loss of PDA, 9400CE was higher than the 2790C. In addition, the electronic tags to set in the forest a month later, two pieces had been unable to properly reading and a small portion of the soil surface and covered with sawdust. Obviously radio frequency technology for forest resource survey work, yet may be affected by many uncertain factors, so still a long time to repeated observations to improve the accuracy.

With the development of RFID (Radio Frequency Identification) technology, many application domains have applied the technology to support the routine operations. The ranges of forest in Taiwan are wide and inconvenient; it needs a great amount of labors and materials to proceed to the forest resource survey. In addition, manual records would easily produce mistakes. FRID was predicted that they can effectively promote forest resource survey with to assisting investigator. This study used 120 trees of Diospyros philippensis (Desr.) Gurke as a survey target that was located in the 36th compartment of Hengchun working circle. Used two different types of Tag equipments (Tag 501w, ABS Stick Tag) with two different types of PDA (HP iPAQh 2790C, CPT 9400CE) to make up The four different types of RFID equipments would be evaluated by the effective power of distance and time, and statistical analysis would be used in this research. PDA at the same time each survey recorded in the actual operation of power loss, and to observe the damage status of electronic tags. The results showed that reading effectiveness of 2790C PDA and ABS electronic labels information is the best. It could reach about 2.86 cm and the reading off time was 0.76s. The power loss of PDA, 9400CE was higher than the 2790C. In addition, the electronic tags to set in the forest a month later, two pieces had been unable to properly reading and a small portion of the soil surface and covered with sawdust. Obviously radio frequency technology for forest resource survey work, yet may be affected by many uncertain factors, so still a long time to repeated observations to improve the accuracy.