Dual-Imaging Distance Measurement Timing for LiDAR Interference
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Solution Overview
Problem
Existing distance measuring devices using Light Detection and Ranging (LiDAR) experience mutual interference when measuring the same target simultaneously, leading to inaccurate distance measurements due to overlapping laser light reflections.
Innovation Solution
A distance measuring apparatus with multiple imaging and distance measuring units, along with processors and memory, controls distance measurements by adjusting settings based on data from both units to minimize interference, using encryption and comparison of image recognition data to synchronize laser operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electronic apparatuses perform distance measurement simultaneously to the same target, then productivity is improved through parallel measurement, but measurement precision deteriorates due to mutual interference of laser light
Solution Approach 1:
The patent implements periodic action by assigning different time slots for laser irradiation and reflected light reception to multiple electronic apparatuses. Each apparatus performs distance measurement in alternating time intervals, ensuring that when one apparatus irradiates laser light, others are in reception mode, and vice versa. This periodic time-division multiplexing eliminates mutual interference while maintaining parallel measurement capability across multiple devices.
Solution Approach 2:
The patent applies preliminary action by having electronic apparatuses exchange measurement timing information before performing distance measurements. Each apparatus预先 (in advance) determines its irradiation and reception time slots based on communicated timing data from other apparatuses, ensuring that interference-free measurement windows are established before actual measurement begins. This preliminary coordination enables subsequent accurate measurements without real-time interference.
2Measurement precision
If laser irradiation and reflected light reception are separated in time for one apparatus, then measurement precision is improved by avoiding self-interference, but time loss increases due to sequential operation
Solution Approach 1:
The patent merges the measurement operations of multiple electronic apparatuses into a coordinated system where irradiation and reception phases are combined across different devices rather than sequentially executed within a single device. While one apparatus irradiates, another receives reflected light, and vice versa in alternating time slots. This merging approach maintains the precision benefits of separated irradiation and reception while reducing overall measurement time through parallel operation across multiple apparatuses.
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
Effectively reduces mutual interference by synchronizing laser operations, ensuring accurate and reliable distance measurements even when multiple devices measure the same target.
Implementation Method 1
a light receiving unit that receives the reflected light
Implementation Method 2
a laser light irradiation unit that irradiates the target with laser light
Data Source
AI summary
A distance measuring apparatus includes first and second imaging units that capture an image within first and second angles of view, respectively, first and second distance measuring units that perform distance measurement for a target included within the first and second angles of view, respectively, and one or more processors that operate to perform control regarding distance measurement to detect distance measurements for a common target by the first and second distance measuring units using first data generated with the first imaging unit and second data generated with the second imaging unit when the second distance measuring unit different from the first distance measuring unit also performs distance measurement for the target included within the second angle of view to be captured by the second imaging unit.