Research And Design Of Security Monitoring System Based On Sensor Network In Scenic Area

In recent years,China's tourism industry has entered a rapid growth stage.Ensuring tourist's safety is the basis of the healthy development of the tourism industry.The tourism safety risk of mountainous areas is higher than other general scenic spots especially,the landslide and visitors broke into dangerous areas without authorization occur from time to time.The current safety monitoring systems,which are offen used in the areas of banks,airport perimeters,industrial hazardous areas and large water conservancy projects are very different from the tourist's safety monitoring system.There is a big gap in the construction costs,equipment type,professional staff,etc.Between two different systems,it is difficult to apply these safety monitoring systems in scenic spots.In this dissertation,the mountain landslide and regional perimeter monitoring of mountainous scenic areas are studied deeply.Firstly,the main landslide and perimeter monitoring technology at home and abroad are analyzed.The working principle and main advantages of MEMS inclination measuring sensor and K-band FM continuous radar sensor are mainly studied.The integrated sensor based on inclination sensor and radar sensor is designed.By installing sensors in the field,the monitoring information collected by the sensors is collected through the bus interface to the controller,and then the data is sent to the remote monitoring center by the wireless network.The background server predicts the potential for accidents by dynamically analyzing the trends of the collected data.The system can work in all the conditions of all-weather all-day,remote,real-time monitoring and early warning.Secondly,with the MEMS tilt sensor chip as a key device,the hardware circuit of the inclination measuring instrument is designed,which includes signal acquisition,signal conditioning,microprocessor,communication interface,working power of different devices and reference power supply.The angle measuring instrument can collect the inclination angle signal of different positions and different depths of landslide hazard slope in real time and calculate the inclination angle.Thirdly,the 24 GHz frequency radar sensor module as a key device,based on the analysis of the principle of frequency measurement and continuous wave radar,the radar transmitter and receiver circuit are designed.This radar can identify and alarm the personnel intrusion in the perimeter and dangerous area of the scenic area,and has the advantages of strong environmental adaptability,high sensitivity,wide detection angle and low cost.Finally,according to the application requirements of the subject,the antijamming data smoothing algorithm,the programmable modulation signal waveform generation,the FFT frequency estimation algorithm analysis and the software design are completed.In the laboratory environment,the validity of the safety monitoring system design scheme is verified.It is an effective and easy to install method for the identification and early warning of mountainous landslides and dangerous areas.