基于磁弹性传感器的金黄色葡萄球菌检测机理研究  

Research on the detection mechanism of dairy products based on the magnetoelastic wireless sensor

作　　者：王华 陈德文[4] 周德强[1,2,3] 曹丕宇 WANG Hua;CHEN De-wen;ZHOU De-qiang;CAO Pi-yu(The Key Laboratory for Advanced Food Manufacturing Equipment Technology of Jiangsu Province,Wuxi, Jiangsu 214122,China;School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China;Key Laboratory of Nondestructive Testing ,Nanchang,Jiangsci 330063,China;National Center of Quality Supervision and Inspection for Commodity,Yiwu,Zhejiang 322000,China)

机构地区：[1]江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [2]江南大学机械工程学院,江苏无锡214122 [3]无损检测技术教育部重点实验室[南昌航空大学],江西南昌330063 [4]国家日用小商品质量监督检验中心,浙江义乌322000

出　　处：《食品与机械》2018年第11期60-63,81,共5页Food and Machinery

基　　金：江苏省食品先进制造装备技术重点实验室开放课题(编号:FM-201806);浙江省科技计划项目(编号:2015C32108);无损检测技术教育部重点实验室开放基金(编号:ZD201629001);国家自然科学基金(编号:51107053).

摘　　要：针对乳制品中可能含有金黄色葡萄球菌的问题,研制了用于检测金黄色葡萄球菌的无线磁弹性传感器,研究该磁弹性传感器检测机理,对比分析磁弹性无线传感器在有菌和无菌的乳制品中共振频移以及荧光。结果表明,磁弹性传感器的共振频率能够较好地反映传感器自身的重量和传感器所处液体的黏度,由于金黄色葡萄球菌的增殖会引起牛奶黏度的变化,且金黄色葡萄球菌会与修饰在膜片的适配体结合引起质量变化,从而影响传感器的共振频率。通过试验验证液体黏度对磁弹性传感器振动频率的抑制也较为明显,当黏度变化只有0.15mPa·s时,其共振频移能够达到0.5kHz。In view of the possible inclusion of Staphylococcus aureus in dairy products,a magnetoelastic S.aureus wireless sensor was developed to study the detection the mechanism of its magnetoelastic sensor in dairy products.By comparing the magnetic resonance wireless sensor’s resonance frequency shift and fluorescent experiment in bacteria and aseptic dairy liquids,the analysis results showed that the resonant frequency of the magnetoelastic sensor could better reflect the weight of the sensor.When the mass of the sensor decreases or the liquid increased,the resonance frequency of the sensor decreased.It was also confirmed that the viscosity of the liquid was significantly suppressed by the viscosity of the magnetoelastic sensor.Even though the viscosity changed only 0.15 mPa·s,the resonance frequency shift could reach 0.5 kHz.

关 键 词：磁弹性传感器 金黄色葡萄球菌 牛奶 共振 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程]