Research on Digital Phase Difference Measuring Instrument

Wei Hua Wu

doi:10.4028/www.scientific.net/AMM.329.368

Paper Titles

An Intelligent Malfunction Detection System for Ammunition Loading and Feeding Systems of Ammunition Carrier
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Research of Characteristics Extraction Based on Dynamic Pressure Signal
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Research on Fault Diagnosis Model of Tank Equipment
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Design of High-Precision Frequency Meter
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Research on Digital Phase Difference Measuring Instrument
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Study on Accuracy Measure of Trigonometric Leveling
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Design of Multi-Channel Temperature and Humidity Sensor Acquiring System
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An Improved Hardware System of Excitations Pulse on X-Waves with Direct Digital Synthesizer
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Charge-Sensitivity-Oriented Analysis of Quantum Point Contact Sensor Based on the Landauer's Formula
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 329Research on Digital Phase Difference Measuring...

Research on Digital Phase Difference Measuring Instrument

Abstract:

The paper presents the digital phase measuring instrument based on MSP430 single-chip microcomputer. The instrument adopted the technology of DDS to generate sinusoidal signal, and FPGA to achieve phase difference measurement and polarity judgment. The system is composed of a filtering circuit, a phase shifting network, a shaping circuit, matrix keyboard, LCD display module and the frequency is in the range from 200Hz to 10kHz, the phase difference is in the range of-180°~+180 °, the resolution ratio is 0.1°, the absolute error is less than ±2 °, and the relative error is less than ± 3%.