A Presentation on

Land slide warning system

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

INTRODUCTIONThe 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 sensorsLandslide warning system is based on wireless sensor networks

using zigbee protocol.

Sensors deployment

DESCRIPTION The landslide warning system is based on Zigbee wireless communication Protocol, adopts the CC2430 chip for wireless data transmission.

System structure diagram

HARDWARE DESIGNThe 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 AND ROUTER

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 a pressure level sensor and a signal amplifier.

Liquid level sensor connection

DESIGN OF THE COORDINATORThe coordinator node has a GSM module and a serial

communication module. It chooses SP3223 as the serial communication module.

Schematic circuit of serial module

Circuit of GSM 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.

FLOW CHART OF TERMINAL NODE

CONCLUSIONThe sensor nodes are the bases of wireless sensor networks. It

includes a sensor network node system for landslide based on CC2430 which can monitor the situation of mountain.