US 11,859,999 B2
Device for calibrating laser level
Xin Shi, Shanghai (CN); and David Xing, Dover, NJ (US)
Assigned to NORTHWEST INSTRUMENT INC., Dover, NJ (US)
Filed by NORTHWEST INSTRUMENT INC., Dover, NJ (US)
Filed on Dec. 30, 2022, as Appl. No. 18/149,042.
Application 18/149,042 is a continuation of application No. PCT/CN2021/104657, filed on Jul. 6, 2021.
Claims priority of application No. 202011629145.X (CN), filed on Dec. 31, 2020.
Prior Publication US 2023/0221143 A1, Jul. 13, 2023
Int. Cl. G01C 25/00 (2006.01); G01C 15/00 (2006.01)
CPC G01C 25/00 (2013.01) [G01C 15/006 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A laser level calibrating device, comprising:
a base platform configured to support a laser level that is to be mounted on the base platform at a first position;
a target arranged at a second position of the base platform and configured to receive a laser; and
an image recognition device configured to:
obtain images of lasers projected on the target before and after the laser level rotates a first angle;
determine, based on an image recognition result of the images, positions of the lasers emitted by the laser level to determine a deviation distance;
determine whether the laser level needs to be calibrated based on the deviation distance, the deviation distance being determined by position data of the first position and the second position, and the first angle.