Device For Measuring Electrical Parameters Based On The Arm

With the development of power electricity industry, the nonlinear loads on the electricity network are getting more and more. This will make the voltage and current under nonsinusoidal conditions which then will cause the pollution of electricity network's harmonic. The harmonic wave will be harm to power security. When the electric instrument was produced, we should make some measurement to identify whether it will cause the pollution of electricity or not. So it is necessary to find a real-time equipment to measure the harmonic wave. According to the requirement of this thesis, a electricity calculating device is presented. This device use LPC2132 of Philips as the processor and makeμC/OS-II as the embedded operating system.The paper has described the design of hardware and software. With regards to the hardware design, LPC2132 is adopted to the processor, and combined with other circuit, a hardware platform of sampling, communication and human interface has been put forward. With regards to the software, the algorithm of electric parameters has first been analyzed .The transplant ofμC/OS-II has also been finished. Then based onμC/OS-II, each function part of the software system is designed as independent tasks, such as sampling, testing power parameter calculating, communication and human interface.