面向食品质量检测的低功耗射频pH传感器设计

发布时间：2018-04-04 20:45

本文选题：食品质量　切入点：射频　出处：《传感技术学报》2017年06期

【摘要】：设计了一个检测食品质量的由两片纽扣电池供电、可持续工作30天左右的低功耗射频pH传感器。此传感器由一个由氧化铱(IrOx)电极和氯化银(AgCl)参比电极组成的pH电极、电压转换频率电路和无线通信电路三部分组成。电压转换频率电路将pH电极产生的灵敏度为-49.6 mV/pH的电压转换成灵敏度为-4.073 kHz/pH的频率信号,然后无线通信电路将频率信号调制后传送到阅读器。本文中用此传感器对储藏在5℃下的猪肉持续监测200 h,对储藏在30℃下的牛奶持续监测26 h,实验结果证明射频pH传感器可以用于食品pH随食品质量变化而变化的食品质量检测。射频pH传感器和阅读器系统可以实现准确、方便、长期的无线食品质量检测。
[Abstract]:The design of a detection of food quality by two pieces of button battery, continuous working 30 days low power pH RF sensor. This sensor is made up of an iridium oxide (IrOx) electrode and silver chloride (AgCl) pH electrode reference electrode, voltage frequency conversion circuit and wireless communication circuit three. The voltage conversion circuit will produce frequency sensitivity of pH electrode for converting voltage -49.6 mV/pH into frequency signal sensitivity is -4.073 kHz/pH, then the wireless communication circuit the frequency signal modulation and sent to the reader. This sensor is used in this paper for storage at 5 DEG C of pork continuous monitoring of 200 h of storage at 30 DEG C continuous monitoring of milk 26 h, experimental results show that the RF pH sensor can be used in the detection of food quality food pH varies with the change of food quality. PH sensor and RF reader system can achieve accurate, square That is, long-term wireless food quality testing.

【作者单位】：太原理工大学物理与光电工程学院;
【分类号】：TP212

【参考文献】