摘要
采用四电极结构传感器和LabVIEW软件,设计了淡水鱼阻抗测量系统,研究电流激励频率、电极测量方向、电极结构、测量部位与淡水鱼阻抗的关系,为建立基于阻抗特性的淡水鱼鲜度检测系统提供理论基础。试验结果表明:阻抗随激励频率的增大而减小,相位随激励频率的增大而增大;沿鱼体侧线平行测量的阻抗大于垂直侧线测量的阻抗,符合生物组织的各向异性;同一激励频率下不同测量部位的阻抗大小不同;同一部位不同时间阻抗的大小不同;采用混合电极测量鱼体鳃部的信号稳定,规律性强,适于淡水鱼鲜度检测。
A fresh water fish bio-impedance measurement system was constructed based on LabVIEW and bio-impedance theory, and the sensor was developed by the four electrodes structure. The relation between the excitation frequency and fish bio-impedance was researched by sweeping frequency driving method. The experiment also investigated the relation between measuring direction and bio-impedance, the relation between electrode structure and bio-impedance, and the relation between measuring position and bio-impedance, which surports the theroy foundation for constructing the measurement system of freshwater fish freshness. The results indicated that the fish bio-impedance amplitude decreases and phase angle increases as the frequency increases, and the bio-impedance measured along the lateral line was bigger than the bio-impedanee measured vertical to the lateral line, which conforms to biological tissue＇s anisotropism. Different measured position results in different bio-impedance, and at the same measuring position, different decay time gets different bio-impedance. The composite electrode measuring gill of fish is suitable for evaluation of fresh water fish freshness due to its stable and accurate test signal.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2007年第9期103-107,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
华中农业大学科研项目(项目编号:52204-02008)
关键词
淡水鱼
鲜度
阻抗特性
虚拟仪器
测试
Fresh water fish, Freshness, Bio-impedance characteristic, Virtual instrument,Measuring
