LIDAR Code Carrier Using Apertures and Reflectivity Contrast
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Solution Overview
Problem
Existing monitoring systems for automatic machines face challenges in accurately defining monitoring zones using digital imaging, are prone to errors due to contamination, and require complex setup and maintenance, especially when using optically detectable codes for LIDAR sensors.
Innovation Solution
An information carrier with a sheet-formed code carrier featuring apertures and varying reflectivity patterns, arranged in a predetermined regular pattern, enhances detection reliability and minimizes errors, even in contaminated conditions, by using retroreflective materials and adaptable shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retroreflective marker devices with codes are used for LIDAR detection, then the monitoring zone can be defined and detected, but the probability of erroneous reading increases due to contamination affecting code reflectivity
Solution Approach 1:
The patent applies reflectivity changes instead of color changes - using areas with different reflectivity values (first reflectivity for code areas, second reflectivity for sheet areas) to create detectable patterns that are less susceptible to contamination. The LIDAR sensor detects these reflectivity differences to identify monitoring zones.
Solution Approach 2:
The patent changes the physical parameter of reflectivity to create the code pattern, rather than relying on optical codes that are prone to contamination. By using areas with fundamentally different reflectivity properties, the system maintains detection reliability even when contamination occurs.
2Adaptability or versatility
If digital imaging devices are used to monitor entire areas, then multiple parameters can be monitored, but it is difficult and expensive to define what parts should be monitored
Solution Approach 1:
The system uses the LIDAR sensor's own emission to detect the monitoring zone boundaries. The sensor emits light that reflects off the marker device, and the reflected light carries information about the monitoring zone definition, eliminating the need for separate configuration systems.
Solution Approach 2:
The marker device serves multiple functions: it defines the monitoring zone boundaries, provides detection targets for the LIDAR sensor, and enables the sensor to self-configure. This multi-functional approach simplifies the overall system configuration.
3Reliability
If physical barriers such as cages are arranged around automatic machines, then person safety is improved, but service and repairs become complicated
Solution Approach 1:
The patent replaces physical mechanical barriers (cages) with an optical detection system using LIDAR sensors and retroreflective marker devices. This substitution maintains safety by digitally monitoring the monitoring zone and can trigger machine shutdowns when unauthorized entry is detected, while eliminating the need for physical enclosures that hinder access.
4Reliability
If digital barriers such as photocell-barriers are used, then machine shutdown can be triggered when persons pass, but many separate barriers are needed around larger machines
Solution Approach 1:
The patent merges multiple separate digital barrier functions into a single integrated system. The LIDAR sensor continuously scans the entire monitoring zone defined by the marker device, replacing the need for multiple discrete photocell barriers with one comprehensive detection system that covers the entire area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides high information density and secure, reliable detection of monitoring zones, allowing easy configuration by non-skilled personnel and reducing the risk of failure, while maintaining effective operation in diverse environments.
Implementation Method 1
At least one of the sheet formed code carrier and the second code areas may have a surface of a retroreflective material
Implementation Method 2
information carrier for providing information to a LIDAR sensor
Data Source
AI summary
An information carrier for providing information to a LIDAR sensor and a method for configuring a monitoring system by using the information carrier. The information carrier comprises a sheet formed code carrier having a first reflectivity, and at least one code pattern on a part of one side of the sheet formed code carrier. The code pattern comprises first code areas in the form of apertures through the sheet formed code carrier, and second code areas having a second reflectivity, wherein the code areas are arranged according to a predetermined regular pattern, and wherein the code areas are at a distance from each other with the code carrier between the code areas.