Lidar Distance Measuring Device Target Correlation
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Solution Overview
Problem
Existing distance measuring devices using LIDAR technology face challenges in accurately measuring speed due to the risk of mistaking multiple time-series luminance signals from different targets as signals from the same target, leading to potential errors in speed measurement.
Innovation Solution
A distance measuring device that evaluates the correlation between time-series luminance signals from consecutive frames to determine if they originate from the same measurement target, thereby suppressing errors and improving speed measurement accuracy by calculating speed based on these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If speed measurement is attempted using multiple time-series luminance signals measured at different points in time, then speed measurement capability is provided, but measurement precision deteriorates due to risk of mistaking signals from different targets as signals from the same target
Solution Approach 1:
The patent applies feedback by using correlation evaluation between consecutive time-series luminance signals to verify target identity before speed calculation. The system measures distance to the same target at multiple time points, evaluates correlation between the signals to confirm they originate from the same target, and only then calculates speed. This feedback mechanism ensures that speed measurement is performed only when target identity is confirmed, preventing measurement errors from mistaking signals of different targets as signals from the same target.
2Adaptability or versatility
If multiple time-series luminance signals are used for speed calculation, then speed measurement is enabled, but reliability decreases due to potential mistaken identification of target signals
Solution Approach 1:
The patent applies preliminary action by performing correlation evaluation between time-series luminance signals before conducting speed measurement. The system first measures distance to a target at multiple time points to generate multiple luminance signals, then evaluates the correlation between these signals to confirm they originate from the same target. Only after this preliminary verification does the system proceed with speed calculation, ensuring that the data used for speed measurement is reliable and from the correct target.
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 effectively reduces the likelihood of mistaken speed measurements and enhances the accuracy of speed measurement by confirming that signals are from the same target, ensuring precise distance and speed calculations.
Implementation Method 1
a distance measuring device that performs processing on a time-series luminance signal generated on the basis of a sensor output corresponding to reflected light of laser light
Implementation Method 2
the distance to the measurement target object is measured on the basis of a time difference between a point in time of emission of the laser light and a point in time corresponding to a peak of a luminance signal value
Data Source
AI summary
A distance measuring device is a distance measuring device that performs processing on a time-series luminance signal generated on the basis of a sensor output corresponding to reflected light of laser light. The distance measuring device includes a storage circuit and a determination circuit. The storage circuit stores a first time-series luminance signal based on reflected light from a first measurement target of laser light and a second time-series luminance signal based on reflected light from a second measurement target of laser light. The determination circuit determines, on the basis of correlation between the first time-series luminance signal and the second time-series luminance signal, whether the first measurement target and the second measurement target are the same measurement target.