Design and implement of a synchronous phase measurement system for dual-channel signals

DU Zhiguang; YAN Shuhua; LIN Cunbao; WANG Guochao; WEI Chunhua

doi:10.7510/jgjs.issn.1001-3806.2016.03.003

In order to realize precise synchronization detection of signal phase for 2-D heterodyne interference displacement measurement, based on the combination of the whole cycle counting and the pulse stuffing methods, a dual-channel synchronous heterodyne signal phase measurement system based on field programmable gate array was designed and implemented by utilizing the same clock reference to detect synchronously and process the dual-channel signals parallelly. The results demonstrate that the resolution of 0.18 is realized with carrier frequency of 100kHz, and the phase synchronization measurement error of 0.18 is achieved for dual-channel signal detection. Accurate measurement of integral and fractional phases was realized by the system. Meanwhile, the real-time synchronous measurement of dual-channel signal phase was then guaranteed. It indicates that the developed system can fulfill the requirement of various 2-D heterodyne interference displacement measurement applications.

Design and implement of a synchronous phase measurement system for dual-channel signals

Corresponding author: YAN Shuhua, yanshuhua996@163.com;

1. Department of Instrument Science and Technology, College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China

Received Date: 2015-04-23

Accepted Date: 2015-05-13

Available Online: 2016-05-25

Abstract: In order to realize precise synchronization detection of signal phase for 2-D heterodyne interference displacement measurement, based on the combination of the whole cycle counting and the pulse stuffing methods, a dual-channel synchronous heterodyne signal phase measurement system based on field programmable gate array was designed and implemented by utilizing the same clock reference to detect synchronously and process the dual-channel signals parallelly. The results demonstrate that the resolution of 0.18 is realized with carrier frequency of 100kHz, and the phase synchronization measurement error of 0.18 is achieved for dual-channel signal detection. Accurate measurement of integral and fractional phases was realized by the system. Meanwhile, the real-time synchronous measurement of dual-channel signal phase was then guaranteed. It indicates that the developed system can fulfill the requirement of various 2-D heterodyne interference displacement measurement applications.

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Reference (15)

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Design and implement of a synchronous phase measurement system for dual-channel signals

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