Lidar Pulse Set Validation for Interference Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser radar systems face reduced measurement accuracy and reliability due to interference from sunlight, lamp light, and other laser radars in real-world environments, leading to inaccurate distance information, which is critical for applications like automatic driving and 3D video gaming.
Innovation Solution
A space measuring apparatus that emits a measurement pulse set with multiple pulse strings at different angles, records pulse characteristics, and combines received optical pulses to form valid pulse sets, allowing for accurate calculation of measurement distances and light intensity while filtering out interference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser radar is used to detect target scene in real-world environment, then distance information can be obtained, but measurement accuracy and reliability are reduced due to interference from sunlight, lamp light, and other laser radars
Solution Approach 1:
The patent segments the measurement process by dividing the pulse set into multiple pulse strings with different emitting angles and time intervals. Each pulse string is independently characterized and validated, allowing the system to identify and reject interference from specific directions or time periods while maintaining measurements from valid sources.
Solution Approach 2:
The patent performs preliminary characterization of the measurement pulse set by recording pulse set characteristics (emitting angles, time intervals, energy values) before actual measurement. This preliminary information is stored and used later to validate received pulses, enabling the system to quickly identify and reject interference without real-time complex analysis.
Solution Approach 3:
The patent implements feedback by comparing the characteristics of received optical pulses against the pre-recorded pulse set characteristics. The calculation component uses this feedback to determine validity of each pulse set, continuously adjusting which measurements are accepted or rejected based on matching characteristics, thereby filtering interference while maintaining accurate measurements.
2Reliability
If multiple pulse strings with different emitting angles are used to improve measurement reliability, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent makes the light emitting component multi-functional by enabling it to emit pulse strings with different emitting angles and characteristics using the same hardware. The calculation component also performs multiple functions: forming pulse sets, validating them against stored characteristics, and calculating measurements. This universal approach improves reliability without requiring separate dedicated systems for each function.
Solution Approach 2:
The patent changes operational parameters (emitting angles, time intervals, energy values) of the same light emitting component to create diverse pulse strings. By varying these parameters rather than adding more hardware, the system achieves improved measurement reliability through multiple measurement perspectives while keeping device complexity manageable.
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 apparatus effectively improves measurement accuracy and reliability by identifying and rejecting invalid optical pulses, ensuring precise distance calculations and enhancing the performance of laser radar systems in various applications.
Implementation Method 1
a light emitting component including at least one light emitting element, configured to emit a measurement pulse set... a light receiving component including at least one detection element, configured to receive optical pulses reflected or scattered by a target scene
Implementation Method 2
each pulse string of the at least two pulse strings includes at least one optical pulse... calculate, according to the pulse set characteristics of pulse sets which are determined as valid, at least one of measurement distance and light intensity
Data Source
AI summary
The present disclosure provides a space measuring apparatus. The apparatus includes: a light emitting component configured to: emit a measurement pulse set, in which the measurement pulse set includes at least two pulse strings corresponding to at least two different emitting angles, each pulse string of the at least two pulse strings includes at least one optical pulse with a same emitting angle; and record pulse set characteristics of the measurement pulse set; and a calculation component configured to form at least one to-be-determined pulse set by combining at least two optical pulses received in a second time interval; determine whether the at least one to-be-determined pulse set is valid according to the pulse set characteristics recorded by the light emitting component; and calculate, according to the pulse set characteristics of pulse sets which are determined as valid, at least one of measurement distance and light intensity.