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本文针对大型停车场中准确检测车位且检测节点方便安装的要求提出了一种基于地磁传感器的停车位无线检测节点。该节点利用磁场传感器检测铁质车身对地球磁场强度的影响来判定车位的停车状况,并利用Zigbee无线网络将信号传输到停车场管理终端。节点具有尺寸小、安装组网方便、对非铁磁性物体无反应、可靠性高等优点[1],较好的满足了停车场车位检测的功能要求。
In this paper, a parking sensor based on geomagnetic sensor is proposed to meet the requirements of accurate detection of parking spaces and detection nodes in large parking lots. The node uses the magnetic field sensor to detect the influence of the iron body on the magnetic field strength of the earth to determine the parking condition of the parking space and transmit the signal to the parking garage management terminal by using the Zigbee wireless network. The node has the advantages of small size, convenient installation and networking, no reaction to non-ferromagnetic objects and high reliability [1], which better meets the functional requirements of the parking lot parking detection.