A new method for increasing accuracy of distance measurement based on single visual camera
Sign Up to like & getrecommendations! Published in 2019 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-019-1786-z
Abstract: Camera has been widely used in computer vision and mobile robotics applications because the sensor provides complementary information. However, the chief drawback of camera is that it only can provide 2D image information without depth… read more here.
Keywords: distance measurement; single visual; distance; method ... See more keywords
Verification of the Relative Distance Measurement Method for Pico-satellites in Constellation
Sign Up to like & getrecommendations! Published in 2018 at "IFAC-PapersOnLine"
DOI: 10.1016/j.ifacol.2018.07.095
Abstract: Abstract This paper considers the optical relative navigation method for the small satellites, describes the algorithms of the image processing and calculating the relative distance and orientation. Different methods and approaches exist but need to… read more here.
Keywords: measurement method; relative distance; method; distance measurement ... See more keywords
Long distance measurement up to 1.2 km by electro-optic dual-comb interferometry
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.4999537
Abstract: We perform a long distance measurement up to 1.2 km on the outdoor baseline by electro-optic dual-comb interferometry. A frequency comb pair is developed by phase modulating a continuous laser with a narrow linewidth, and the… read more here.
Keywords: long distance; interferometry; electro optic; distance measurement ... See more keywords
Improved accuracy of optical distance sensor based on artificial neural network applied to real-time systems
Sign Up to like & getrecommendations! Published in 2022 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/ac527e
Abstract: Optical time-of-flight sensors have potential in the revolution of distance measurement. These sensors can continuously monitor the distance and track the movement of objects. However, the existing sensing methods for such distance optical sensors mainly… read more here.
Keywords: time; optical distance; distance; sensor ... See more keywords
Precise underwater distance measurement using laser frequency comb
Sign Up to like & getrecommendations! Published in 2020 at "Metrologia"
DOI: 10.1088/1681-7575/abd017
Abstract: Underwater distance measurement has been playing an important role in the fields of underwater navigation, search and rescue, and bathymetric survey. However, limited by the measurement sources (e.g. acoustic pulses or incoherent optical pulses), the… read more here.
Keywords: underwater distance; distance; measurement; distance measurement ... See more keywords
Fringe Disappearance in Self-Mixing Interferometry Laser Sensors: Model and Application to the Absolute Distance Measurement Scheme
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2019.2901125
Abstract: The fringes disappearance phenomenon in the self-mixing interferometry occurs whenever the external round-trip phase at free-running state is modulated by either external modulation such as external cavity length changes or internal modulation when the laser… read more here.
Keywords: distance measurement; disappearance; self mixing; absolute distance ... See more keywords
Periodic-Error-Free All-Fiber Distance Measurement Method With Photonic Microwave Modulation Toward On-Chip-Based Devices
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2022.3146896
Abstract: High-accuracy distance measurements with compact configurations and robust operations are necessary in areas ranging from precision engineering to scientific missions. Here, we report a precise and accurate amplitude-modulation-based all-fiber distance measurement method without periodic errors.… read more here.
Keywords: measurement method; fiber distance; distance; modulation ... See more keywords
Radar Distance Measurement With Viterbi Algorithm to Resolve Phase Ambiguity
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Microwave Theory and Techniques"
DOI: 10.1109/tmtt.2020.2985357
Abstract: In this article, a precise phase-based radar distance measurement system using a Viterbi decoder to resolve phase ambiguity is presented. Relying on the frequency-modulated continuous-wave radar principle, the introduced method evaluates both the frequency and… read more here.
Keywords: distance measurement; distance; ambiguity; resolve phase ... See more keywords
Sub-100-nm precision distance measurement by means of all-fiber photonic microwave mixing.
Sign Up to like & getrecommendations! Published in 2021 at "Optics express"
DOI: 10.1364/oe.421719
Abstract: The importance of dimensional metrology has gradually emerged from fundamental research to high-technology industries. In the era of the fourth industrial revolution, absolute distance measurements are required to cope with various applications, such as unmanned… read more here.
Keywords: distance measurement; distance; precision distance; 100 precision ... See more keywords
FMCW LiDAR with an FM nonlinear kernel function for dynamic-distance measurement.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.458235
Abstract: Frequency-modulated continuous-wave (FMCW) LiDAR is an absolute-distance measurement technology with the advantages of high-precision, non-cooperative target measurement capabilities and the ability to measure distance and speed simultaneously. However, the existing range extraction method for FMCW… read more here.
Keywords: distance measurement; measurement; fmcw lidar; nonlinear kernel ... See more keywords
Arbitrary distance measurement without dead zone by chirped pulse spectrally interferometry using a femtosecond optical frequency comb.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.469774
Abstract: We demonstrate an arbitrary distance measurement method by chirped pulse spectrally interferometry (CPSI) using femtosecond optical frequency comb (OFC). In this paper, the chirped fiber Bragg grating (CFBG) is used to investigate the mapping relationship… read more here.
Keywords: frequency; distance; chirped pulse; distance measurement ... See more keywords