Triangulation Sensor Curved Scanning Line
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Solution Overview
Problem
Existing monitoring sensors using the principle of laser triangulation struggle to reliably detect objects outside the main direction of monitoring, particularly those moving transversely to the vehicle's direction of locomotion, leading to potential collisions.
Innovation Solution
A monitoring sensor with a light transmitter and receiver arranged to generate a concavely curved scanning light line on a scanning plane inclined at a predefined angle, allowing for improved detection of objects in lateral regions by maintaining a consistent monitored zone extent and ensuring sufficient light remission across the sector-shaped monitored area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the transmitted light is widened in fan shape to extend the monitored zone laterally, then the coverage area is improved, but the light intensity and remission reliability deteriorate in lateral regions
Solution Approach 1:
The patent applies curvature by forming the scanning light line as a concavely curved line rather than a straight line. This curved geometry allows the light to maintain consistent intensity across the monitored zone while expanding lateral coverage. The curvature compensates for the natural light intensity drop-off that would occur in straight-line fan-shaped spreading, ensuring reliable detection across the entire monitored area including lateral regions.
2Area of stationary object
If the scanning light line extends as a straight line transversely to the main monitoring direction, then the lateral coverage is improved, but the detection reliability of objects outside the main direction deteriorates
Solution Approach 1:
The patent replaces the straight-line scanning light line with a concavely curved scanning light line. This curved configuration maintains optimal light intensity distribution across the monitored zone, ensuring that objects in lateral regions receive sufficient light for reliable detection. The curvature geometry ensures that the light path length and intensity remain consistent across different angular positions, improving measurement precision for objects outside the main monitoring direction.
3Length of stationary object
If the transmitted light is emitted obliquely at a predefined angle of inclination, then the monitored zone spacing is optimized, but the detection capability for transversely moving objects deteriorates
Solution Approach 1:
The concavely curved scanning light line extends the monitored zone in a sector form that better covers transverse directions. The curvature allows the light to sweep across a wider angular range while maintaining optimal spacing characteristics, enabling the system to detect transversely moving objects that would otherwise fall outside the effective monitoring zone of a straight-line configuration.
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
Enhances the detection of objects in lateral regions, enabling early detection of transversely moving vehicles or obstacles, thus preventing collisions by maintaining a consistent monitored zone extent and ensuring reliable light remission across the sector-shaped monitored area.
Implementation Method 1
The light generated by the light source of the light transmitter is focused with the aid of the transmission optics to form a transmitted light beam that is incident in the monitored zone on an object to be detected
Implementation Method 2
The transmitted light can be remitted, i.e. diffusely or specularly reflected, by such an object
Implementation Method 3
The transmitted light can be remitted, i.e. diffusely or specularly reflected, by such an object
Implementation Method 4
The transmitted light can be remitted, i.e. diffusely or specularly reflected, by such an object. It passes through a reception optics and can be detected by a light receiver
Implementation Method 5
The position of a light spot generated by the remitted light on the light receiver in the so-called direction of triangulation changes in dependence on the distance between the monitoring sensor and the remitting object. There is a clear geometrical relationship between the point of incidence on the light receiver and the distance of the detected object
Data Source
AI summary
The present invention relates to a monitoring sensor for the spatially resolved detection of objects in a monitored zone in accordance with the principle of triangulation, comprisinga light transmitter for transmitting transmitted light into the monitored zone, wherein the light transmitter comprises a light source and a transmission optics that has an optical axis;a light receiver that has a plurality of receiver elements for receiving light from the monitored zone that is remitted by an object to be detected; anda reception optics arranged upstream of the light receiver.The invention further relates to a floor-bound vehicle having a monitoring sensor.