مدل‌سازی و طراحی حسگر اندازه‌گیری بار ذرات متحرک با الکترود سکه‌ای

نوع مقاله : مقاله برق

نویسنده

دانشکدة مهندسی برق، دانشگاه ولایت، ایرانشهر، ایران

چکیده

موضوع این مقاله‏‌ طراحی و مدل‌سازی یک حسگر الکترودینامیک با مدار و مشخصات بهبود یافته برای اندازه‌گیری بار ذرات متحرک است. این حسگر می‌تواند با رصد تغییرات میدان مغناطیسی، در طراحی و ساخت ادوات نوع غیرمستقیم در اندازه‌گیری پارامترهای سرعت‌، تراکم و توزیع ذرات متحرک در لوله‌ها و انتقال‌‌دهنده‌های صنعتی استفاده گردد. دو جزء اصلی حسگر شامل ترانسدیوسر و مدار شکل دهندۀ سیگنال است. بخش ترانسدیوسر از یک الکترود فلزی سکه‌ای و یک مبدل جریان به ولتاژ ساخته شده است که فرآیند طراحی آن شامل بدست آوردن مدل حساسیت الکترومغناطیسی الکترود و محاسبة جریان القاء شده به آن است. همچنین، اجزای مدار شکل‌دهندة‌ سیگنال، با قطعات الکترونیکی بروز، شامل تقویت‌کننده‌های متوالی ولتاژ و فیلتر‌های کاهش نویز است که بر مبنای نتایج مدل‌سازی ترانسدیوسر طراحی شده‌اند. نتایج حاصل از آزمایشها و شبیه‌سازی‌های طرح نهایی نشان داد که حسگر می‌تواند طیف وسیعی از دامنة میدان مغناطیسی ناشی از ذرات متحرک را با حساسیت بالا و پایداری مناسب مدار تشخیص دهد و می‌تواند گزینة مناسبی در استفاده در ابزار‌های اندازه‌گیری باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Modeling and Design of Moving Particle Charge Sensor with Coin Shaped Electrode

نویسنده [English]

  • Teimour Tajdari
Department of Electrical Engineering, Velayat University, Iranshahr, Iran
چکیده [English]

The subject of this article is the design and modeling of an electrodynamic sensor with improved circuit specifications to measure the charge of moving particles. This sensor can be used to observe magnetic field changes, non-intrusively, to measure velocity, density, and distribution parameters of moving particles in industrial pipelines and conveyors. The two main components of the sensor are the transducer and the signal conditioning circuit. The transducer is made of a coin-shaped metal electrode and a transimpedance amplifier. The electrode design process involves obtaining the magnetic sensitivity model of the electrode and calculating the induced current. In addition, the signal conditioning circuit components, with upgraded electronics, include sequential voltage amplifiers and a noise reduction filter that are based on transducer modeling results. The results of the experiments and simulations of the final design showed that the sensor can detect a wide range of magnetic field amplitudes produced by moving particles. Also, the sensor has high sensitivity and good circuit stability and can be a good choice for use in measuring instruments.

کلیدواژه‌ها [English]

  • Electrodynamic sensor
  • Finite element method
  • Transducer
  • Sensitivity model
  • Signal conditioning circuit
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