LIDAR Sensor Device With Beam Identification For Simultaneous Operation
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Solution Overview
Problem
Conventional LIDAR sensors experience mutual interference and increased latency due to simultaneous operation, leading to incorrect object recognition and prolonged measurement times, as they wait for reflected signals before rotating and transmitting laser pulses.
Innovation Solution
A LIDAR sensor device that transmits laser beams with identification information, allowing for immediate direction change and simultaneous operation without waiting for reflected beams, using a transmitter with a preamble and signal processor to measure distance, speed, and intensity, and including device identification to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional LIDAR waits for a reflected beam before rotating and transmitting the next laser pulse, then it can accurately measure distance, but the measurement time increases proportionally to the product of latency and angular resolution
Solution Approach 1:
The transmitter transmits laser beams in advance without waiting for reflected beams to be received. Each laser beam includes identification information indicating its transmission direction, allowing the receiver to process multiple reflected beams simultaneously and the signal processor to determine object positions without sequential waiting, thereby reducing measurement time while maintaining accuracy
Solution Approach 2:
The transmitter continuously transmits laser beams in different directions without interruption or waiting periods. By including identification information in each beam and using a receiver that can handle multiple beams simultaneously, the system maintains continuous useful action rather than pausing for latency periods, significantly reducing total measurement time
2Area of stationary object
If multiple conventional LIDARs and radars operate simultaneously, then coverage area increases, but mutual interference occurs causing incorrect object recognition
Solution Approach 1:
Laser beam identification information acts as an intermediary that allows multiple LIDARs to operate simultaneously without interference. Each transmitted laser beam includes identification information indicating its transmission direction and device identifier. The receiver uses this information to tag reflected beams, and the signal processor determines which reflected beam corresponds to which transmitted beam, enabling multiple devices to coexist and expand coverage while maintaining recognition accuracy
Solution Approach 2:
Each laser beam is given unique local quality through identification information that specifies its transmission direction and device identifier. This allows the receiver to distinguish between beams from different devices and different directions, preventing mutual interference while allowing multiple LIDARs to operate simultaneously for expanded coverage
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
Reduces latency and measurement time, improves accuracy by preventing mutual interference and allowing simultaneous operation of multiple LIDAR sensors, and enhances measurement precision.
Implementation Method 1
a receiver that receives a reflected beam returning after the laser beam is reflected by an object
Data Source
AI summary
A light detection and ranging (LIDAR) sensor device includes a transmitter that transmits a laser beam including laser beam identification information corresponding to each transmission direction while changing a transmission direction, a receiver that receives a reflected beam returning after the laser beam is reflected by an object, and a signal processor that identifies a transmission direction of a laser beam corresponding to the reflected beam based on laser beam identification information included in the received reflected beam.