| How to realize the unmanned and intelligent management of parking area has become a research hot topic of smart parking.Parking detection technology based on magnetic detection is becoming more and more popular.At the same time,NB-IoT technology has quickly been widely used in the field of Internet of Things.The thesis studies the parking space detection technology based on 3-axis magnetic induction and NB-IoT communication technology.Based on this,a parking space management system is designed and developed.The main work of the thesis is as follows:1.The variation of the magnetic field of the parking space under different conditions is studied.Based on this,a method for detecting parking spaces by using magnetic field changes is designed,and an anti-interference algorithm for adjacent parking spaces based on the change of magnetic field angle is proposed,the parking space sensor can accurately analyze the occupancy of the parking space.2.Based on the technical characteristics of NB-IoT,a monopole antenna suitable for the working frequency band of NB-IoT module is designed by HFSS simulation software,and verify the performance of the designed antenna.The antenna conforms to the working frequency band of the NB-IoT module and has the ability to radiate in all directions.3.Based on the analysis of the demand of smart parking business,the parking space management scheme based on NB-IoT technology and 3-axis magnetic detection technology is proposed.Designed a parking sensor node based on STM32L151C8T6 ultra-low power microcontroller,including hardware circuit design and embedded software design.The sensor node has the advantages of small size,low power consumption and low cost.4.Using Node.js technology and Express framework,a parking space management system based on B/S architecture is designed and the web server is set up in the Alibaba Cloud.Users can use the computer,mobile phone,tablet and other devices to access the parking space management platform anytime and anywhere to monitor the status of each parking space in real time.The test results show that the parking space sensor node can accurately detect the occupancy of the parking space and send the parking space information in time through the NB-IoT network.The parking space management system is accessible through the outer net and the interactive interface is very friendly.Therefore,the management of the parking lot is more efficient,the operating cost is lower,and it has certain promotion and application value. |
PDF Full Text Request