黑龙江科技学院学报Issue(2)：187-191,206,6.
相位差测量系统的硬件电路
Hardware circuit desing of phase difference measurement system
车翼飞1
作者信息
- 1. 黑龙江农业工程职业学院信息学院,哈尔滨150088
- 折叠
摘要
Abstract
For accurate measurement of the phase difference of the two same-frequency signals, a kind of phase difference measurement system based on DSP is designed. As the main control chip in the system, DSP2812 integrates capture unit and A/D module; Channel exchange technology and frequency reduction technology are used to eliminate additional phase shift by channel, and convert high frequency signals to low frequency signal before being measured. The test results show that the two input signals are the same, if the input signal frequency is too large or too small, the accuracy of measuring frequency and phase will be significantly reduced, little change in amplitude accuracy; two peak input signal, the same frequency, the phase can be changed, the increase in signal frequency or signal amplitude is too small, the system ac- curacy will decline. Experimental results show that the phase difference measurement system can well measure amplitude frequency and phase difference of two input signals with the same frequency. The system can also be further extended to realize to phase difference measurement of multi-channel signals.关键词
相位差测量/降频电路/信道交换/DSPKey words
phase difference measurement/frequency reduction circuit/channel exchange/digitalsignal processing分类
信息技术与安全科学引用本文复制引用
车翼飞..相位差测量系统的硬件电路[J].黑龙江科技学院学报,2012,(2):187-191,206,6.
