| 淡水鱼鲜度检测系统的阻抗特性测试 |
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| 引用本文： | 张军,李小昱,王为,肖武.淡水鱼鲜度检测系统的阻抗特性测试[J].农业机械学报,2007,38(9):103-107. |
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| 作者姓名： | 张军 李小昱 王为 肖武 |
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| 作者单位： | 华中农业大学工程技术学院 |
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| 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。
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| 关 键 词： | 淡水鱼 鲜度 阻抗特性 虚拟仪器 测试 |
| 修稿时间： | 2006-07-19 |
Measurment of Bio-impedance Characteristic of Freshwater Fish Based on Virtual Instrument |
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| Zhang Jun,Li Xiaoyu,Wang Wei,Xiao Wu.Measurment of Bio-impedance Characteristic of Freshwater Fish Based on Virtual Instrument[J].Transactions of the Chinese Society of Agricultural Machinery,2007,38(9):103-107. |
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| Authors: | Zhang Jun Li Xiaoyu Wang Wei Xiao Wu |
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| Institution: | Huazhong Agricultural University |
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| Abstract: | 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-impedance 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. |
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| Keywords: | Fresh water fish Freshness Bio-impedance characteristic Virtual instrument Measuring |
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