Design of 3D vertical plumb line coordinator based on CCD

In order to solve the problem that existing vertical plumb line coordinator can only measure displacement change in one direction, a 3D vertical plumb line coordinator based on CCD was designed. Composition and measurement method of the instrument were given, and circuits of parallel light source and CCD timing drive based on CPLD were introduced in details. The experiment result shows that the instrument is stable, fast and convenient for data processing, so as to realize accurate measurement of horizontal and vertical displacements caused by the deformation of mine shaft.