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Register a new userControlling of irrigation depending on specific soil moisture using operational amplifier
التحكم بعملية الري اعتماداً على رطوبة نوع معين من التربة باستخدام المضخم العملياتي
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Tishreen University ورقة بحثية
Publication date
2014
fields
Physics
and research's language is
العربية
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Shamra Editor
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يرمي هذا البحث إلى تصميم وتنفيذ جهاز إلكتروني للتحكم بعملية الري بالاعتماد على رطوبة التربة. يقوم الجهاز بتنظيم عملية الريّ , بحيث إنه عندما يقل مستوى رطوبة التربة عن قيمة محددة يتم اختيارها مسبقاً اعتماداً على السعة الحقلية المائية للمحصول , فإن الأوامر تصدر لمضخة المياه بالعمل، وعندما يصل مستوى الرطوبة إلى تلك القيمة المحددة تتوقف المضخة عن العمل. يتألف هذا الجهاز من قسمين رئيسين: القسم الأول: دارة إلكترونية صمّمت باستخدام عدد من المضخمات العملياتية, وبعض العناصر الإلكترونية ومقياس فولت لقياس فرق الكمون بين طرفي مقاومة الحمولة الموضوعة على التسلسل, مع المقاومة بين مسبرين مغروسين في التربة. القسم الثاني: الجزء الكهربائي الذي يؤمن الاتصال الآمن بين الدارة الإلكترونية السابقة والمضخة المائية. لقد قمنا بإجراء هذه الدراسة على عيّنة من التربة السوداء. رسمنا العلاقة بين المقاومة الكهربائية للتربة وحجم المياه المستخدمة في الري من أجل ثلاث قيم للبعد بين المسبرين ولجهد التغذية, فوجدنا انخفاضاً حاداً في المنحنيات البيانية من أجل القيم الصغيرة لحجم المياه المستخدمة.
The purpose of this research is to design and realization of an electronic apparatus which is able to control the process of irrigation that depending on soil moisture .This apparatus organize the process of irrigation, when the level of soil moisture under a specific value that it was chosen depending on water field capacity of crop ,it operates the pump which connected with it, and when the moisture level reaches that value the pump stops working. The apparatus consists of two parts: The first part: An electronic circuit using a number of operational amplifiers ,some electronic elements ,and voltmeter to measure voltage between load resistance which is in serial with resistance between two probes that set in soil. The second part: An electrical part ,which provides a secure connection between the previous electronic circuit and water pump. This study was carried out on a simple of black soil .The relation between electrical resistance of soil and volume of water used in irrigation was drawing for three values of distance between probes and power supply. We found an intense declination curves for small values of used water volume.
References used
Sawyer، C.N. & P.L. McCarty,Chemistry for environmental engineers . McGraw Hill Publ, 1978
Elizabeth Martin and Robert Hine, A Dictionary of Biology 6 ed, Publisher Oxford University Press,2008
Shmulik P. Friedman,Soil properties influencing apparent electrical conductivity: a review computers and electronics in agriculture, Volume 46, Issues 1–3, March,2005
Ward Chesworth,Field Capacity, Publisher Springer Netherlands, 2008
Tony R. Kuphaldt , Lessons in electric circuits, Volume III { Semiconductors{ Fourth Edition, last update October 31, 2005
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