Traffic Scanning LIDAR Multi-Angle Reflection
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Solution Overview
Problem
Existing vehicle velocity monitoring systems using Doppler radar struggle with accurately measuring multiple vehicles due to wide beamwidth, while LIDAR systems face challenges with motion and precise aiming requirements, limiting their effectiveness in moving applications.
Innovation Solution
A traffic scanning LIDAR system that sweeps a beam across a field of view at varying heights, using a transceiving reflection device with multiple angled faces to detect and focus beams, allowing for simultaneous speed and position calculation of multiple objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Doppler radar uses a wide beamwidth to enable moving applications, then ease of operation is improved, but measurement precision deteriorates because the operator cannot identify which vehicle is being measured
Solution Approach 1:
The invention divides the wide radar beam into multiple discrete, narrow beam segments using a mechanical scanner. Each narrow beam can be independently directed at specific vehicles, allowing the system to maintain the wide field of view coverage while providing precise target identification and measurement for each segmented beam direction.
Solution Approach 2:
The invention introduces a mechanical scanning mechanism that dynamically redirects the narrow laser beams across different angles and positions. This dynamic scanning capability allows the system to cover a wide field of view while maintaining the precision of narrow beams, resolving the contradiction between beam width and measurement precision.
2Measurement precision
If LIDAR uses a narrow beam to improve measurement precision, then measurement precision is improved, but ease of operation deteriorates because the operator must carefully aim the LIDAR
Solution Approach 1:
The invention combines the precision of narrow LIDAR beams with the wide coverage capability of radar systems by integrating a mechanical scanning mechanism. This allows a single LIDAR system to perform both precise target measurement and wide-area surveillance, making it universally applicable for both stationary and moving law enforcement applications.
Solution Approach 2:
The mechanical scanner acts as an intermediary device that couples the narrow LIDAR beam with the wide field of view requirement. By using the scanner as a mediator, the system achieves wide coverage without requiring the operator to manually aim, thus improving ease of operation while preserving measurement precision.
3Measurement precision
If LIDAR requires precise aiming to maintain measurement precision, then measurement precision is improved, but device complexity increases due to the need for stable mounting and aiming mechanisms
Solution Approach 1:
The mechanical scanning mechanism automatically performs the aiming function through programmed scan patterns, eliminating the need for manual aiming adjustments. The system self-manages the beam direction control, reducing the complexity of mounting requirements while maintaining precise measurement capability through automated beam steering.
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
Enables accurate and simultaneous measurement of vehicle speeds and positions, overcoming the limitations of Doppler radar and LIDAR systems by providing a wide field of view and precise tracking without the need for constant aiming, thus improving operational efficiency in moving applications.
Implementation Method 1
The beam source may generate a beam. The transmit reflection device may reflect the beam at the objects
Implementation Method 2
determines the vehicle speed by performing distance time calculations based on the travel time of the reflected light pulse
Implementation Method 3
The transmit reflection device may include a plurality of transmit faces with at least a portion of the transmit faces oriented at a different angle and operable to reflect the beam at a different height
Data Source
AI summary
A system for determining the speed and position of objects comprises a beam source, a transmit reflection device, a beam receiver, a receive reflection device, and a controller. The beam source may generate a beam. The transmit reflection device may reflect the beam at the objects and may include a plurality of transmit faces with each transmit face oriented at a different angle and operable to reflect the beam at a different height. The beam receiver may detect the beam. The receive reflection device may include a plurality of receive faces with each receive face oriented at a different angle and operable to focus the beam reflected from objects at different heights onto the beam receiver. The controller may determine the position of the objects over time and calculate the speed of the objects based on a change in the position of the objects.