tailieunhanh - Cost effective system using for bioimpedance measurement

This paper presents an economical system for measuring the bioimpedance of meat. The measurement is based on the electrical Fricke model and the inverting configuration of operational amplifiers (op-amp). The system can generate testing signals with frequency ranged from 10Hz to 1MHz and adjustable amplitude up to . | Journal of Science Technology 136 2019 033-038 Cost Effective System using for Bioimpedance Measurement Nguyen Phan Kien Tran Anh Vu Hanoi University of Science and Technology - No. 1 Dai Co Viet Str. Hai Ba Trung Ha Noi Viet Nam v Received January 22 2019 Accepted June 24 2019 Abstract This paper presents an economical system for measuring the bioimpedance of meat. The measurement is based on the electrical Fricke model and the inverting configuration of operational amplifiers op-amp . The system can generate testing signals with frequency ranged from 10Hz to 1MHz and adjustable amplitude up to . The sweeping input and output of the op-amp are captured by an oscilloscope that is connected to and controlled by a computer before being processed by MATLAB. The system allows performing automatic customizable sweep routines. Generally the measurement on a resistor and a RC meat-modeling circuit and a meat sample provided favorable results. In the future system will be used for measurement and assessment meat quality in order to create a new methods for assessment of food quality. Keywords bioimpedance Fricke model oscilloscope MATLAB 1. Introduction Food quality is now one of the concerning issues in the society. Being popular in many families daily meals meat provides a significant amount of nutrient for human body. Thus the examination of meat freshness is getting more attention of governments and consumers. To meet these challenged requirements the evaluation methods need to be exact and fast using noninvasive technics to estimate the quality. Along with the invasive analysis in the laboratory the fast checking meat quality methods have been implemented. In 1 2 3 4 they use mechanics analysis to evaluate the resistant of the meat 1 4 to differentiate between raw and well done meat 2 to determine the effects of the measure direction to the probes 3 . Some researches are based on ultrasound measurement such as ultrasound spectrum analysis 5 and reflection wave