Laser Rangefinder Mover Control for Multi-Vehicle Interference
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Solution Overview
Problem
Unmanned carrier vehicles equipped with laser rangefinder sensors can incorrectly detect objects when their laser beams intersect, leading to erroneous distance measurements in shared operating areas.
Innovation Solution
The implementation of a mover system with a masking processing unit that masks disturbance waves not related to the scanning wave, and a transmission restricting unit that limits the scanning wave transmission range, to prevent incorrect object detection by distinguishing and filtering out irrelevant signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple unmanned carrier vehicles operate in the same traveling area using laser rangefinder sensors, then the productivity of the moving system is improved, but the measurement precision of object detection deteriorates due to interference between laser beams from different vehicles
Solution Approach 1:
The patent segments the traveling area into multiple transmission ranges, each assigned to a different unmanned carrier vehicle. The control unit determines and restricts the transmission range of each vehicle's laser beam, preventing overlap and interference between beams from different vehicles. This segmentation allows multiple vehicles to operate simultaneously in the same general area without compromising detection precision.
2Area of stationary object
If the laser rangefinder sensor transmits scanning waves in all directions, then the area of detection is improved, but the harmful factors affecting other vehicles increase due to laser beam interference
Solution Approach 1:
The patent applies local quality by restricting the laser beam transmission to specific directional sectors rather than omnidirectional transmission. The control unit determines the transmission range based on the vehicle's location and assigns specific angular sectors to each vehicle. This localized transmission approach allows each vehicle to maintain adequate detection coverage in its assigned sector while preventing harmful interference to other vehicles in adjacent sectors.
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
This approach significantly reduces the chances of erroneous object detection by accurately differentiating between relevant and irrelevant signals, enhancing the accuracy of object detection in multi-vehicle environments.
Implementation Method 1
The unmanned carrier vehicle includes a laser rangefinder sensor with the ability to measure the distance to an object located in an area surrounding the unmanned carrier vehicle. The laser rangefinder sensor emits a laser beam and detects a reflected beam
Implementation Method 2
The laser rangefinder sensor emits a laser beam and detects a reflected beam (as a reflected wave), thus measuring the distance to the object constituting an obstacle
Implementation Method 3
The masking processing unit performs masking processing of masking, in accordance with a timing at which, and/or a direction of incidence in which, a disturbance wave, not depending on the scanning wave, is incident on the receiver unit, a portion of the reception signal output from the receiver unit
Data Source
AI summary
Disclosed herein is a mover including an object detecting unit and either a masking processing unit or a transmission restricting unit as an additional processing unit. The object detecting unit detects an object based on a reception signal output from a receiver unit by having a transmitter unit transmit a scanning wave and by having the receiver unit receive a reflected wave, which is a component, reflected from the object, of the scanning wave. The masking processing unit performs masking processing of masking, in accordance with a timing at which, and/or a direction of incidence in which, a disturbance wave, not depending on the scanning wave, is incident on the receiver unit, a portion of the reception signal output from the receiver unit. The transmission restricting unit restricts a transmission range in which the transmitter unit transmits the scanning wave.