车位状态探测方法研究

发布时间：2018-02-02 20:51

本文关键词： 泊车车位状态主动磁场计费流程　出处：《中北大学》2015年硕士论文　论文类型：学位论文

【摘要】：为用户提供一个实时显示车位状态信息的智能手机APP，对于解决当前城市泊车难问题有一定作用，手机APP应用的关键在于车位状态的真实探测。鉴于超声波、红外等探测方法能耗高以及被动地磁探测结果可靠性低等问题，本文研究了两种车位状态探测方法：主动磁场探测方法和计费流程探测方法。 1主动磁场探测方法。使用永磁体和导磁材料建立主动磁场和磁路，通过磁传感器探测车位状态的变化。设计了主动磁场探测器，研究了其原理，分析了车位上方有无车辆两种情形下，磁路中磁力线的闭合路径；从材料选取和结构设计方面进行了磁路设计；针对不同车身离地间隙，采用磁路计算和实验仿真方法，对探测器模型进行了分析，两种结果对比表明：主动磁场探测方法可行。同时，针对车位空间位置的分布特点，设计了车位状态信息逐车位传输的中继式无线传感器网络。 2计费流程探测方法。客户端进行泊车登记和缴费操作时，服务端在计费流程中获取车位状态信息。分析了泊车登记和驶离缴费时车位状态的获取方式；设计了两套泊车计费管理方案：一是无需现场管理员，需硬件投入的联网咪表方案；二是需少量现场管理员，不需硬件投入的人工贴条方案；设计了泊车管理系统来论证该方法。在系统设计阶段，提出了基于openfire的消息服务推送框架，设计了系统中的功能角色、数据库、时序图、流程图和客户端界面等。主动磁场探测方法，相对于地磁探测方法，结果更为准确可靠，采用不消耗能量的永磁体，装置功耗低；计费流程探测方法，用户与管理方的相互制约保证了探测结果准确，系统运行中获取车位状态信息，，方法实现成本低。
[Abstract]:To provide users with a real-time display of parking space status information smart phone app, to solve the current problem of parking difficulties in the city has a certain role. The key of mobile phone APP application lies in the real detection of parking space status. In view of the high energy consumption of ultrasonic and infrared detection methods and the low reliability of passive geomagnetic detection results. In this paper, two detection methods of parking space status are studied: active magnetic field detection method and billing flow detection method. (1) active magnetic field detection method. Permanent magnet and magnetic conductive material are used to establish active magnetic field and magnetic circuit, and magnetic sensors are used to detect the change of parking position. The active magnetic field detector is designed, its principle is studied, and the closed path of the magnetic force line in the magnetic circuit is analyzed. The magnetic circuit is designed from the aspects of material selection and structure design. The detector model is analyzed by magnetic circuit calculation and experimental simulation. The comparison of the two results shows that the active magnetic field detection method is feasible. According to the distribution characteristics of parking space position, a relay wireless sensor network is designed, which transmits the parking space status information one by one. 2 the detecting method of charging flow. When the client carries on parking registration and payment, the server obtains the status information of parking space in the charging process. The methods of obtaining parking space status when parking registration and departure payment are analyzed. Two sets of parking billing management schemes are designed: one is a networked parking meter scheme that requires no on-site administrator and requires hardware input; Second, need a small number of on-site administrators, no hardware input of the manual sticker program; A parking management system is designed to demonstrate this method. In the system design phase, a message service push framework based on openfire is proposed, and the function role, database, timing diagram of the system are designed. Flow chart and client interface etc. Compared with the geomagnetic detection method, the active magnetic field detection method is more accurate and reliable. The detection method of charging process, the mutual restriction between user and management, ensures the accuracy of the detection result, acquires the status information of parking space in the system operation, and the cost of the method is low.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U495;TP274

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