|
Most of the traditional power meter are made by electromagnetic induction generally . In addition to finite functions , it can’t measure reactive energy and requirement . Electric Power INC also need to appoint copyist to make a copy of power meter record . Opposite to the traditional power meter can transfer measured data to the internet , the Electric Power INC can monitor the power meter immediately faraway . The Electric Power INC can save personnel expenses , and they use immediate data to choose different charge in separate time , which make the charge to rationalize . The TMS320C31 DSP Starter Kit is a floating point CPU , which it is very suit to calculate exact decimal figure . This digital power meter project it is very useful . Texas Instrument supplies complete compiler and debugger interface , so we can accomplish the software and hardware debugger effectively . DSK don’t have General Purpose I/O , so I add external 8255 IO interface . I can connect A/D converter and LCD modular directly ,which are the slow device against DSP . In addition to show these calculated value on the LCD modular , I also add the RS-232 interface to DSK . The digital power meter can communicate with PC by using this interface . Then the PC transfer these calculated data to the internet database , it can accomplish to make a copy of power meter record automatically . This digital power meter are designed to calculate Vi (immediate voltage)、Ai (immediate current)、Vrms (root mean square voltage)、Arms (root mean square current)、Pav (average power)、Wt (total works)、PF (power fact=Cosθ) .
|