基于巨磁阻传感器的无线车位探测器  

Wireless vehicle detector based on giant magneto-resistive sensor

作　　者：张星波[1] 钱正洪[1] 白茹[1] 吕海洋[1] 孙玲玲[1] 

机构地区：[1]杭州电子科技大学磁电子中心,浙江杭州310018

出　　处：《机电工程》2012年第12期1477-1479,1484,共4页Journal of Mechanical & Electrical Engineering

基　　金：浙江省重大科技专项资助项目(2011C11047);浙江省"磁电子材料和器件"高校创新团队资助项目(2009[171]);浙江省科技厅创新团队资助项目(2010R50010);浙江省大学生新苗人才计划资助项目(2011R407041)

摘　　要：为解决现有车位探测器无法在露天场所和恶劣天气中使用的问题,根据车辆经过会引起地磁场扰动这一现象,将高灵敏度巨磁阻传感器和ZigBee技术应用到车位探测器中。开展了巨磁阻传感器在车底路面不同位置的响应分析,建立了巨磁阻传感器输出与车底探测位置之间的关系,采用了国产磁传感器SAS03-1作为敏感元件,搭配信号处理电路对磁场信号进行了处理,由CC2530芯片自带的A/D转换器采集信号,通过Z-Stack协议实现了组网传递;在LabVIEW编写的上位机界面上对车辆探测器进行了性能评价。研究结果表明,该探测器能实时采集车辆引起的地磁场变化,从而判断车辆的有无,不仅功耗低,而且安装方便,具有一定的实用性。In order to solve the problem of useless in the recent vehicle detector in the outdoors and bad weathers, a wireless vehicle detector was designed by using Giant magnetoresistive sensor and ZigBee technology. After the analysis of giant magneto-resistance （GMR） sensor outputs of the different location under vehicle, the relationship of GMR sensor output and location under the vehicle was established. A SAS03-1 sensor was used as the sensing element and the signal was collected by A/D concerter in CC2530 and transmit by Z-stack protocol. The detector was evaluated on the host computer program. The function of the detector was tested. The results indicate that the detector can sense real-time magnetic field changes caused by vehicles. The wireless vehicle detector has low power consumption and can be easily installed.

关 键 词：巨磁阻传感器 无线车位探测器 ZIGBEE 

分 类 号：TM93[电气工程—电力电子与电力传动] TN98[电子电信—信息与通信工程]