Results 41 to 50 of about 10,408,415 (315)

Hybrid Visible Light and Ultrasound-Based Sensor for Distance Estimation

open access: yesSensors, 2017
Distance estimation plays an important role in location-based services, which has become very popular in recent years. In this paper, a new short range cricket sensor-based approach is proposed for indoor location applications.
Jose Rabadan   +5 more
doaj   +1 more source

Rapid Profiling of Marine Notches Using a Handheld Laser Distance Meter [PDF]

open access: yes, 2012
A rapid, single-user profiling method for rocky shores is described. The Leica Disto D8 handheld laser distance meter measures distance up to 100 m and inclination in 360 degrees.
Andrade F.   +7 more
core   +1 more source

Fringe Disappearance in Self-Mixing Interferometry Laser Sensors: Model and Application to the Absolute Distance Measurement Scheme

open access: yesIEEE Sensors Journal, 2019
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 ...
Mengkoung Veng, J. Perchoux, F. Bony
semanticscholar   +1 more source

A Review on Applications of Capacitive Displacement Sensing for Capacitive Proximity Sensor

open access: yesIEEE Access, 2020
Capacitive proximity sensors (CPSs) are ubiquitous because of their simple design, low cost and low consumption. Capacitive displacement sensing, as one of the three sensing modalities, works for long distance and can be unitized to measure more physical
Yong Ye   +5 more
doaj   +1 more source

Forward Vehicle Collision Warning Based on Quick Camera Calibration

open access: yes, 2019
Forward Vehicle Collision Warning (FCW) is one of the most important functions for autonomous vehicles. In this procedure, vehicle detection and distance measurement are core components, requiring accurate localization and estimation.
Lu, Yuwei, Wang, Qi, Yuan, Yuan
core   +1 more source

Movement patterns and athletic performance of leopards in the Okavango Delta [PDF]

open access: yes, 2018
Although leopards are the most widespread of all the big cats and are known for their adaptability, they are elusive and little is known in detail about their movement and hunting energetics.
Bertram B   +12 more
core   +2 more sources

Distance Measurement with Harmonic Modulation of Self-Mixing Laser Wavelength at External Optical Feedback [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Физика, 2020
Background and Objectives: Self-mixing interferometry of absolute distances is currently well represented by the method of frequency modulation of the laser diode supply current (FMCW). In recent years a harmonic modulation of the power current of a self-
Skripal, Anatoly Vladimirovich   +4 more
doaj   +1 more source

Proof of the Standard Quantum Limit for Monitoring Free-Mass Position

open access: yes, 2010
The measurement result of the moved distance for a free mass m during the time t between two position measurements cannot be predicted with uncertainty smaller than sqrt{hbar t/2m}.
J. von Neumann   +3 more
core   +1 more source

Measurement-Induced Long-Distance Entanglement of Superconducting Qubits using Optomechanical Transducers [PDF]

open access: yes, 2016
Although superconducting systems provide a promising platform for quantum computing, their networking poses a challenge as they cannot be interfaced to light---the medium used to send quantum signals through channels at room temperature.
Hammerer, Klemens, Černotík, Ondřej
core   +3 more sources

Synthetic-wavelength-based dual-comb interferometry for fast and precise absolute distance measurement.

open access: yesOptics Express, 2018
We present an absolute distance measurement system using a phase-stable dual-comb system with 56.09 MHz repetition rate and 2 kHz repetition rate difference.
Zebin Zhu   +4 more
semanticscholar   +1 more source

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