可程式邏輯控制器於水簾式畜舍環控管理之研究

Application of Programmable Logic Controller for Environmental Control Management in Livestock Building with Evaporative Cooling Pad System

黃裕益(Yu-I Huang) ； 謝廣文(Kuang-Wen Hsieh) ； 鄭俊哲(Chun-Che Cheng)

《畜產研究》 33卷4期 (2000/12) Pp. 384-396

摘要

近來隨著畜牧自動化的發展，畜舍環境控制與管理上，已應用到可程式邏輯控制器（PLC），尤其在畜牧業者漸接受密閉式水簾畜舍的趨勢下，利用PLC進行密閉式水簾式畜舍的管理更顯得重要。本研究利用三菱FX2N PLC，以水簾式畜舍為對象進行環境控制策略的設計，透過選寫於PLC內的程式自動控制畜舍內水簾與風扇，以調節通風量進行室內溫度的管理。此外，透過物件導向程式語言Microsoft Visual Basic 6.0撰寫圖形監控程式，藉由個人電腦與PLC的結合，建立電腦圖形介面取代傳統的控制面板，提供畜舍內各元件的控制、溫度的監視及環境資料之收集，並透過資料庫之資料計算畜舍內熱量之主要來源，進行畜舍內通風量之自動調整。本研究建立之圖形監控程式以模型畜舍進行試驗，能準確的控制模型畜舍內各個元件的開啟與關閉，並依溫度需求自行控制風扇之啟動，或是利用資料庫計算啟動之風扇數目，調整通風量帶走畜舍內產生的熱量，經本研究之結果顯示，利用PLC搭配圖控程式應用於畜舍環境監控上為一可行之方法。

關鍵字

畜舍 ； 環控管理 ； 可程式邏輯控制器 ； 圖形監控

並列摘要

In the recent years, due to the development of livestock automation, there are several examples which applying Programmable Logic Controller (PLC) in managing livestock production. Now, because a lot of farmers have accepted the concepts of using close-type buildings, using the PLC to control and manage them appears much more important. This study used Mitsubishi FX2N PLC to design the control policy for livestock building with cooling pad. Operations of the water pad and fans can be controlled automatically by applying temperature variations of climate and writing the programs within PLC. Indoor temperature can also be regulated by changing the ventilation rate. Besides, the graphic monitoring program can be written through the objective direction program language of Microsoft Visual Basic 6.0. The graphic interface is constructed instead of traditional control panel by connecting the computer and PLC. It provides the control of components, the monitoring of temperatures, and the collection of environmental data. The major source of heat in the livestock building is calculated through the database which can regulate the ventilation rate automatically. A graphic monitoring program was constructed in this study. It was applied and evaluated by the operations of livestock building model. Experimental resulted show that it could control each component to open and close accurately. It also could control and start the fans needed according to temperature setting, or calculated the required number of fans and heat removal by ventilation according to database. Therefore, it is feasible to apply PLC with a graphic monitoring program for environmental monitor and control of livestock building.

並列關鍵字

Livestock building ； Environmental control management ； Programmable logic controller ； Graphic monitoring control