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 20 of 24 for “"flow sensor"”.
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Self-calibrating mass flow sensor
… accuracy and self-calibration for a mass flow sensing system on a combine. This was undertaken as part of the John Deere Technology Innovation Center (JDTIC)-sponsored research program “Self-calibrating mass-flow sensor”, in turn part of a John Deere Moline Technology Innovation Center …
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High temperature ultrasonic gas flow sensor based on lead free piezoelectric material
… for measurement of gas velocity in stack flow applications is undertaken and it is shown that the ultrasonic time-of-flight method is the most suitable and offers a number of advantages over alternatives. Weakness of current piezoelectric based transducers are identified as the inability …
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Fluid flow measurement using electrical and optical fibre strain gauges.
The design, development and calibration of three flow sensors to measure the speed and direction of fluid flow is presented in this thesis. The force exerted by the fluid flow on the sensors are measured using strain gauges. Multidirectional fluid flow measurement has been made possible by …
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Control of a Quadcopter Aerial Robot Using Optic Flow Sensing
… custom-built quadcopter aerial robot using optic flow sensing. Optic flow sensing is a vision-based approach that can provide a robot the ability to fly in global positioning system (GPS) denied environments, such as indoor environments. In this work, optic flow sensors are used to stabilize the …
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RoboFly: Towards Autonomous Flight of a Multimodal Insect-Scale Robot
… the need for motion feedback from offboard sensors such as a motion capture arena, is addressed. The robot requires at least three sensors onboard to make it hover about a point in space without drifting away. The proposed sensors are as follows-- 1) a MEMS gyroscope for attitude control, 2) …
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The Role of Pkd1 in Mouse Inner Ear Hair Cells
… or PC-1) that is reported to function as a fluid flow-sensor in the kidney. As a member of the transient receptor potential (TRP) family, PC-1 has also been hypothesized to play a role in the elusive mechanoelectrical transduction (MET) channel in inner ear hair cells based on PC-1 role of fluid …
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Design, Development and Implementation of Intelligent Algorithms to Increase Autonomy of Quadrotor Unmanned Missions
… under GPS denied environments. An optical flow sensor and a laser range finder are used within an Extended Kalman Filter for position estimation and its estimation performance is analyzed by comparing against measurements from a GPS module. Flight testing results are presented where the …
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An analysis of quadrotor flight in the urban canopy layer
… focuses on the development of an onboard wind sensor for quadrotors. Although it is not yet clear how to integrate these measurements into a global wind field estimate or use them in a planner, it is intuitive that on-board measurements could inform the local wind field estimate or validate the …
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Artificial Lateral Line Canal System for Underwater Disturbance Sensing
… to create an artificial lateral line canal, flow sensors are needed to detect the flow inside the canal. A microfabricated artificial haircell flow sensor has been developed for this purpose. The sensor utilizes a piezoresistive transduction mechanism. It consists of a silicon cantilever with …
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Non-invasive electromagnetic wave sensor for flow measurement and biphase application
Multiphase flow measurement is important in chemical processing, water treatment and oil & gas industry. The multiphase flow sensor proposed in this research utilizes the resonant frequencies that occur inside a cavity and the differences in the permittivity of the measures phases. By measuring …
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Vision-Assisted Control of a Hovering Air Vehicle in an Indoor Setting
… control. A unique means of using an optic flow sensor for velocity and position estimation in an indoor setting is presented with flight results. Reliable hover flight and hallway following capabilities are exhibited in GPS-denied indoor flight using only onboard sensors. Attitude angles …
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Manufacturing of lab-on-a-chip devices : characterizing seals for on-board reagent delivery
… a fluidic seal. Fluidic seals, controlling the flow of reagents, are characterized to reduce anomalies in the desired flow pattern. The nature of the current seal was investigated. Four seal patterns - line hemisphere, line flat, chevron hemisphere and chevron flat were created and tested for …
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Novel Bio-inspired Aquatic Flow Sensors
… develop and characterize two new sets of novel flow sensors. One set of sensors developed and studied in this work are flow sensors fabricated using carbon nanomaterials. These sensors are made by embedding carbon nanotubes (CNT) and carbon nanohorns (CNH) into a polymeric substrate and then …
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Evaluation of an Aerodynamic Particle Sizer With Certified Polydisperse Test Dusts
… Control Systems Inc. Mark 3 impactor, 3) Flow Sensor 6-stage multicyclone, and 4) modified EPA Method 5 dust loading. Tests were conducted with four different dusts including BCR67 and BCR70 dusts with certified known particle size distributions, and two fly ashes produced from pulverized …
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Vascular Effects of PHYSALIA PHYSALIS Venom
… femoral artery. The skeletal muscle venous blood flow of the hind leg was functionally isolated. Femoral vein blood flow and pressure were monitored from ports in the extracorporeal flow sensor. Four of the twelve dogs were also subjected to lumbar sympathetic chain stimulation. Lingual, renal, …
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High-Resolution Thermal Measurements in Fluids
Based on the thermal measuring methods for mass-flow sensors a thin-film sensor is presented allowing flow-rate measurements of down to 1 milligramm per hour, as required for application in medical dosing systems. <br>Due to the fast response of the sensor to thermal actuation and its low power …
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Design and development of a device to diagnose and treat obstructive sleep apnoea
… of standard breathing effort and pulse oximetry sensors as well as a flow sensor to provide the necessary information to conduct a home sleep test for the diagnosis of sleep apnoea, as required by the American Academy of Sleep Medicine (AASM). The diagnostic algorithm proposed by the AASM is also …
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Smart Platform for Low-Cost MEMS Sensors – Pressure, Flow and Thermal Conductivity
… the development of low-cost, small and accurate sensors and thus has resulted in significant research into sensors, with the aim of advancing the price/performance ratio in commercial solutions. Micro Electro Mechanical Systems (MEMS) have recently offered an attractive solution to miniaturise …
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Electrostatic micro actuators for mirror and other applications
… the approach to design an innovative true mass flow sensor using an electrostatic resonant beam as the sensing element.
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Development of innovative transducers based on Magnetic Fluids
… is easily detectable by using magnetic sensors. In this Thesis an innovative approach to the development of com-plex devices made by multiple sensing parts together with actuators, and an integrated micro-fluidic system are considered. The basic concept here is the use of new materials, …
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