The Design Of Minitype Grating Movement Sensor

Firstly, this passage makes a brief introduction for the development of the grating testing device in the domestic and abroad. It is also including the basic theories of the grating. Meanwhile , based on a project on grating instrument with small range that combining grating sensor and with the special demand of the measuring inside diameter of barrel, we analysis the important modulus of the Micro Motion Grating Sensor design, including the type of grating pair, the width of moire fringe and photo detectors and so on.Secondly, based on the analysis of the advantage and disadvantage of classical means about moire fringe subdivision, and come up with a kind of granting signal direction and subdivision, that is to say, take use CPLD and A/D to realize the direction and subdivision.Finally, the passage makes a precise analysis of the measuring circuit and the data processing system.