1) heterodyne frequency shift
外差移频
1.
By means of the heterodyne frequency shift technique and the computer storage technique the sensitivity of beat frequency achieved 1×10 -4 Hz.
用外差移频技术实现周期的细分，再辅以微机存贮技术使频率差分辨率达到１×１０－４Ｈｚ。
2) heterodyne multiple frequency
外差式多频相移
1.
Study on 3D optical points dense cloud measuring system based on heterodyne multiple frequency phase shift technology;
外差式多频相移技术的三维光学点云测量研究
2.
On the basis of computer two-eye vision technology and heterodyne multiple frequency technology,3D dense point cloud optical measurement software named by XJTUOM software had been developed,3D data of the object surface mought be acquired precisely by means of this way,According to the whole marked points come from XJTUDP,every pieces of point cloud mought be assembled automatically.
开发的XJTUOM三维光学密集点云测量系统软件,基于外差式多频相移技术和计算机双目立体视觉技术,可以精确采集物体表面的三维数据,利用XJTUDP产生的全局标志点,可以实现每幅点云的自动拼接。
3) differential frequency drift
差频漂移
4) heterodyne mixing
外差混频
5) heterodyne frequency
外差频率
6) heterodyne beat
外差拍频
补充资料：差移
1.犹差错。
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