Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Laser sensor"”.
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Label-Free Biosensor Based Upon Replica-Molded Vertically Emitting Distributed Feedback Laser
The DFB laser sensor represents a departure from conventional passive resonant sensors insofar as the device actively generates its own narrowband high-intensity output without stringent requirements on the coupling alignments resulting in a simple, robust illumination and detection configuration. …
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Analysis of soil compaction and furrow depth from planter row unit
… The second part employs LiDAR and a single-point laser sensor to measure field furrows under actual operating conditions. This technique assesses the depth and distribution of furrows. X-ray CT can identify and quantify soil beneath furrows compacted by the planter row unit's wheels and other …
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Development of a camber measurement system for skis and snowboards
… Line machine's frame with a gap between for a laser sensor. The guide rail and cart system from the past interns' machine was retrofitted with the motor and controls of the Line machine and a new drive belt to carry the sensor along the length of the ski. A Micro Epsilon optoNCDT 1401-200 laser …
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Experimental and numerical investigation of wire waveguides for therapeutic ultrasound angioplasty
… (NiTi) wire waveguides in this study. A laser sensor is used to measure the frequency and amplitude output of the distal tip of the wire waveguide, and this is compared to amplitude estimations obtained using an optical microscope. Power is observed to affect both amplitude and frequency. …
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Palladium coated edge-emitting lasers for hydrogen sensing applications
… gas in concentrations as low as 4%, reliable sensors capable of detecting small concentrations of hydrogen with quick response times are a necessity. A novel type of hydrogen sensor utilizing a thin film of palladium deposited on the ridge of an edge-emitting laser has been designed and …
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Generation of tunable q-switched erbium-doped fiber laser based on graphite flakes saturable absorber
Pulsed fiber laser has tremendous application in laser processing and laser sensor. The key element to produce a passively Q-switched fiber laser is by using a saturable absorber (SA). Passively Q-switched fiber laser is the most desirable pulse in laser technology due to its ability to generate …
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Investigation of desiccation cracks in drying soil
… evolution was characterised with a 2D/3D profile laser sensor coupled to a motion controller that allowed scanning of the overall surface of the drying soil. The system developed for this work was used to track the three most relevant variables associated with the behavior of soils during …
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Development of situation recognition, environment monitoring and patient condition monitoring service modules for hospital robots
… The system includes an RGB video camera and a 3D laser sensor, which monitor the environment in order to detect an intruder, or a patient lying on the floor. The system deals with various image-processing and sensor fusion techniques. The environment monitoring module monitors several parameters …
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Distributed feedback fibre laser strain and temperature sensors
… of polarimetric distributed feedback (DFB) fibre laser sensors for simultaneous strain and temperature measurements. These fibre Bragg grating (FBG) based sensors offer strain and temperature measurement accuracies of ±0.3 - ±15 µ.epsilon and ±0.04 - ±0.2°C which are suitable for many …
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Er:YAG Lasers for Methane and Wind Sensing
… a transitory fossil fuel is lost. We propose a laser resonator for use in an Integrated Path Differential Absorption LIDAR (IPDA) LIDAR system capable of detecting fugitive emissions over natural gas pipelines from a light aircraft. The goal for this system is a dual-pulsed Q-switched …
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Robust recovery of piled box-like objects in range images
… industrial robotic arm, on the hand of which a laser sensor is mounted for data acquisition. Besides, a vacuum gripper is mounted on the hand of the robot for object grasping. The object removal process is as follows: Firstly, the top side of the object configuration is scanned by linearly …