Research On The Blocking Characteristic Digital Testing Instrument Of The Power Line Trap

This thesis discusses and studies the blocking characteristic testing method of the power line trap based on correlative detecting principle and modern digital signal processing technology . Also it gives its hardware and software realization. Experiments approve the validity of the method . The main work of this paper is presented as follow:1. Introduce and discuss the research actuality of the power line trap testing methods. Introduce in detail various testing methods, discuss their advantages and shortcomings. Analyze the principle and capability of the current testing instruments.2. Present a new testing method based on the correlation principle . The method makes use of a pair of orthogonal signals to detect the amplitude and phase of the signal to be measured. Its accuracy in theory only depends on the sample quantity. Emphasize its anti-noise ability analysis, and giving its MATLAB simulation . Simulation result indicates that the accuracy of the method can achieve a level of 1%.3. Get DSP chip TMS320LF2407 and A/D conversion chip as its centre, GAL16V8 as the chip-select unit, SPLC501 display module as the output of the instrument, design the hardware system and give the PSPICE simulation of its analog part. Simulation result proves that the design of the analog section is feasible.4. Making use of the Texas Instruments provided C and assemble language developing software and Beijing Real-time Technology Company's simulator, design and debug the software of the system. Adjustment result demonstrates that the hardware and software design of this instrument accord with the academic anticipation, and can achieve the anticipant precision.5. Give the result of the experiment, present the possible improvements in the future...