ZebraNet

Hardware Design Experiences in ZebraNet - 2004

Presented by Zuhal Tepecik

Hardware Design

GPSu-blox

GPS-MS1E

MicroontrollerTI MSp430F149

16bit-RISC2kb AM

60kb Flash

Radio9XStream

902-928MHz

Power Supplies

Charging circuits

Solar Modules

Flash4Mbit

3.3 V 3.1 V 5.0 V

SPI0.67MHz

USART38.4kbps

USART38.4kbps

ZebraNet is a mobile sensor system which consists of sensor nodes built into collars on zebras to take positional readings using GPS

Hardware Design Versions

Constraints

Memory constraint Energy constraint Device access constraint Radio packet size constraint GPS sensing time constraint Flash storage constraint

Energy issues

System Level Energy Management• dual clock scheme• on-the-fly processing• timely use of components

Power Supplies• linear regulators• switch converters

Batteries and Solar Recharge• Solar Cells• Batteries

Operation Schedule

CPU wake up/Radio - Flash power on Radio transmitting / receiving start Network communication time Radio - Flash power off GPS power on GPS sensing time GPS power off / Flash power on CPU sleep / Flash power off

Deployment

In Kenya, the system deployed on Zebras at the 100 sq km.

The radio range is measured between 100 m to 1.2 km; some conditions; such as grazing of Zebras, cause radio range decrease

Zebra location data is given to biologists to learn about Zebra movement difference from day to night

Conclusion

Developed fully-functional highly mobile energy efficient

sensing system

Thank you