CONTENTS Introduction Description Hardware design Design of end device and router Sensors hardware connection Angle sensor Liquid level sensor Design of the coordinator Software design Flowchart of terminal node Conclusion
INTRODUCTION The combined and separated research advancement in the fields of sensing, communication and computing has driven the research efforts in wireless sensor networks. A wireless sensor network is composed of large number of sensor nodes that communicate with each other through multi hop wireless links. Land slide monitoring mainly relies on two sensors 1. Liquid level sensor 2. Angle sensors Landslide warning system is based on wireless sensor networks using zigbee protocol.
DESCRIPTION The landslide warning system is based on Zigbee wireless communicationProtocol, adopts the CC2430 chip for wireless data transmission. System structure diagram
HARDWARE DESIGN The hardware uses CC2430 as the processing core component. It is a system on chip specifically suited for IEEE 802.15.4 and zigbee applications. In a single chip it integrated zigbee RF, memory and 8051 microcontroller. When the system is in spare mode, CC2430 automatically goes into sleeping mode and can switch between sleeping mode and active made in ultra short time.
DESIGN OF END DEVICE ANDROUTER Schematic diagram of end device
SENSORS HARDWARE CONNECTION ANGLE SENSOR: The landslide warning system uses SCA60C as angle sensor. It is used to detect the mountain angle. Angle sensor hardware connection
LIQUID LEVEL SENSOR: Liquid level sensors adopts PTP601, it integrates apressure level sensor and a signal amplifier. Liquid level sensor connection
DESIGN OF THE COORDINATOR The coordinator node has a GSM module and a serial communication module. It chooses SP3223 as the serial communication module. Schematic circuit of serial module
SOFTWARE DESIGNThis design adopts z-stack2006 which is free and half open source zigbee protocol stack. It is made up of MAC layer, physical layer, network layer and application layer.A zigbee network allows one zigbee coordinator.