Design of electrical parameter measuring system based on embedded Linux operating system

YANG Shao-la， CHEN Long-dao
（College of Electrical Engineering， Zhejiang University，Hangzhou 310027， China）

Abstract： In order to solve the problems of low Intelligent and narrow range of the traditional electrical parameter instrument，a system based on synchronization algorithms and linux OS was designed for measuring electrical parameters such as voltage，current，power，etc.. A new measurement circuit which was used to measure the little current and the high current respectively was proposed ；MAX1324 was used for sampling of voltage and three-way current. It was easy to control the relay to determine the sample circuit with judging the three-way current. The system used the synchronization algorithm to revise the original data，which effectively reduced the calculation error. The results show that the system has a high practical application value with its high intelligent，convenient operation and easy maintenance.
Key words： electrical parameter；current measurement； linux operating system； synchronization