Low-power dendrometer based on MSP430F149

QI Xiang-bin1，2 ， ZHANG Mao-zhen1，2，3， CHEN Jin-xing1，2， ZHAO Ping-an1，2
（1. School of Environment and Resource， Zhejiang A ＆ F University，  Lin'an 311300， China；
2. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration，
Zhejiang A ＆ F University， Lin'an 311300， China；
3. The Nurturing Station for the State Key Laboratory of Subtropical Silviculture， Lin'an 311300， China）

Abstract： In order to solve the problems that the diameter measuration in China is still based on measuring tape and can not be automatically done and the data can't be automatically recorded， a kind of low-power dendrometer based on MSP430F149 chips was designed. The hardware and software of the system were expounded in detail，and the system power dissipation was estimated and tested. The dendrometer powered by two 1.5 V batteries can record the diameter growth of the trees continuously. It also provides a convenient interface for data transferring from the system to a SD card as long as the SD card is inserted. The results indicate that the dendrometer has stronger practicability with advantages of simple structure，convenient operation，data automatic recording and automatic storage，low power consumption，low cost etc..
Key words：dendrometer；low-power；growth；MSP430F149；SD card