MACRO-MICRO COMPOSITE GRATING RULER MEASURING SYSTEM BASED ON CONVERSION AND AMPLIFICATION IN VERTICAL AND HORIZONTAL DIRECTIONS

摘要

The present disclosure relates to a macro-micro composite grating ruler measuring system based on conversion and amplification in vertical and horizontal directions. The macro-micro composite grating ruler includes a grating ruler, a macro-micro reading system moving with respect to the grating ruler, and a counting and image processing module. The macro-micro reading system faces grating strip datum and is parallel to the grating ruler. The system further includes a measuring reference line. The measuring reference line obtained by the image sensor together with grating strips forms an image overlap in the counting and image processing module. The measuring reference line and the grating strip jointly include an angle θ. With the foregoing configuration, the present invention is compatible with the existing incremental grating rulers and absolute grating rulers, so is highly applicable.

主权项

1. A macro-micro composite grating ruler measuring system based on conversion and amplification in vertical and horizontal directions, the macro-micro composite grating ruler measuring system comprising a grating ruler, a macro-micro reading system moving with respect to the grating ruler, and a counting and an image processing module, wherein:
the macro-micro reading system comprises a macro-scale reading module and a micro-scale reading module, the macro-scale reading module and the micro-scale reading module being fixedly positioned with respect to each other, the grating ruler having a surface provide with a grating strip band composed of grating strips, the macro-micro reading system facing a datum of the grating strips and being parallel to the grating ruler, and the macro-micro reading system and the grating ruler being separated by a certain distance; the macro-scale reading module and the micro-scale reading module are connected to the counting and image processing module through communication cables; the micro-scale reading module including an image sensor and a lens, and the lens being placed in front of the image sensor; and the system further comprises a measuring reference line, the measuring reference line being a straight line or a set of straight lines that are parallel to each other, the measuring reference line together with the grating strips captured by the image sensor forming an image overlap in the counting and image processing module, and the measuring reference line and the grating strips including a certain angle θ in the image overlap.