LASER SCANNER FOR MONITORING A SURVEILLANCE AREA
Patent Information
- Application Number
- DE502018016093
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2017-06-16
- Filing Date
- 2018-06-15
- Publication Date
- 2025-10-02
- Estimated Expiration
- 2038-06-15
AI Technical Summary
Existing laser scanners for automatic doors and windows struggle to accurately detect small objects near the frame that delimits the monitoring area due to inaccuracies in time-of-flight measurements, particularly in the 'gray zone' where the object's reflectivity differs significantly from the frame's, leading to unreliable detection.
The laser scanner employs an intensity comparison with a predefined threshold to correct time-of-flight measurements by using an avalanche photodiode for intensity evaluation, averaging over multiple pulses, and storing reference intensities to adapt to environmental changes, ensuring accurate detection even in edge areas.
This approach enhances detection reliability for small objects by correcting time-of-flight inaccuracies, allowing for robust and precise identification of objects near the frame, even in challenging conditions.