Laser straight ruler and method for measuring distance and projecting line using the straight ruler
US7411660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jun 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser straight ruler having a main body and a beam scanner installed on the main body. A laser beam is scanned to form a beam spot on an object. A position sensing device receives a laser beam reflected by the object and senses a position of the beam spot. A signal processing unit drives the beam scanner and processes a signal of the position sensing device. A display displays a change in a distance between the main body and the object and data including a measured distance value from the signal processing unit. An input portion inputs data including adjustment of a scanning width of the beam spot and sets start and end positions of the measured distance. A straight distance of the object is measured or the beam spot having a scanning width corresponding to a measured distance or a predetermined distance is projected to the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.