Radar Speed Measurement Using 3D Position Correction
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Solution Overview
Problem
Existing radar systems for speed measurement are limited to two-dimensional data recording and fail to accurately measure speed in three-dimensional spaces due to the presence of pitch angles, leading to significant errors in speed determination.
Innovation Solution
A radar speed measuring method and device that acquires measurement parameters, determines position information, and calculates absolute moving speed by combining relative moving speed and position information, effectively handling three-dimensional scenarios by using vector averaging to correct errors and provide accurate speed measurements at any altitude and pitch angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radar uses fixed altitude and fixed pitch angle working mode, then device complexity is reduced, but measurement precision deteriorates due to inability to measure speed in three-dimensional spaces
Solution Approach 1:
The patent transforms the radar system from a static two-dimensional measurement mode to a dynamic three-dimensional measurement mode. By introducing pitch angle as a variable parameter and establishing a three-dimensional coordinate system, the radar can now adapt to targets at different altitudes and angles, resolving the contradiction between device complexity and measurement precision.
Solution Approach 2:
The patent adds the pitch angle dimension to the traditional two-dimensional radar measurement system. By incorporating the pitch angle parameter and establishing a three-dimensional coordinate system with horizontal angle, altitude, and pitch angle, the system achieves accurate speed measurement in three-dimensional space while maintaining manageable complexity through systematic mathematical modeling.
2Measurement precision
If radar operates in three-dimensional space with pitch angle, then measurement precision improves, but device complexity increases due to rotation of data acquisition plane
Solution Approach 1:
The patent applies preliminary action by pre-establishing a three-dimensional coordinate system and deriving the transformation formula before actual measurement. The conversion formula between the rotating coordinate system and the fixed coordinate system is prepared in advance, allowing the radar to directly apply the formula during measurement without real-time complex calculations, thus reducing processing complexity while maintaining three-dimensional measurement capability.
Solution Approach 2:
The patent introduces a coordinate system transformation as an intermediary between the radar's rotating measurement plane and the fixed ground reference frame. By using the three-dimensional coordinate system as a mediator and applying the derived transformation formula, the system simplifies the complex relationship between rotating and fixed coordinates, making data processing more manageable.
3Adaptability or versatility
If existing data recording models are used in three-dimensional space, then adaptability improves, but measurement precision deteriorates due to model failure with pitch angle
Solution Approach 1:
The patent fundamentally changes the parameters of the data recording model by transitioning from a two-dimensional parameter set (horizontal angle, range) to a three-dimensional parameter set (horizontal angle, altitude, pitch angle). This parameter expansion enables the model to adapt to three-dimensional space while maintaining precision through the established coordinate system transformation.
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 speed measurement of targets in three-dimensional spaces, reducing errors and enhancing the capability of law enforcement agencies to track and penalize traffic violations effectively.
Implementation Method 1
measuring, by the radar, a relative moving speed of the target to be measured along a beam line-of-sight direction of the radar
Data Source
AI summary
Embodiments of the disclosure discloses a radar speed measuring method, a radar, a radar speed measuring device, a server and a storage medium. The method includes: acquiring a measurement parameter set between a radar and a target to be measured; determining position information of the target to be measured relative to the radar according to the measurement parameter set; measuring, by the radar, a relative moving speed of the target to be measured along a beam line-of-sight direction of the radar; and determining an absolute moving speed of the target to be measured along a moving direction thereof according to the relative moving speed and the position information.