Macro-micro composite grating ruler measuring system and measuring method using same comprising a macro-scale reading module, a micro-scale reading module and a measuring reference line
US9945698B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Oct 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34746
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.