Essays about: "ultrasonic signal"

Showing result 11 - 15 of 35 essays containing the words ultrasonic signal.

  1. 11. Simulation and Analysis of Ultrasonic Wave Propagation in Pre-stressed Screws

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Erik Andrén; [2019]
    Keywords : ;

    Abstract : The use of ultrasound to measure preload in screws and bolts has been studied quite frequently the last decades. The technique is based on establishing a relationship between preload and change in time of flight (TOF) for an ultrasonic pulse propagating back and forth through a screw. READ MORE

  3. 12. Optical Fiber sensing of acoustic waves using overlapping FBGs

    University essay from Mittuniversitetet/Institutionen för elektronikkonstruktion

    Author : Erik Lillebø Hole; [2019]
    Keywords : Ultrasonic; Optical Fiber Sensing; Fiber Bragg Grating;

    Abstract : The objective of this thesis was to investigate if an optical fiber sensing method with the use of two overlapping fiber Bragg gratings to measure Lamb wave $S_0$ modes in a steel plate, and how it would compare to traditional PZT transducers. A solution was proposed where the use of an optical fiber sensing system was built and took advantage of the strain dependence of a fiber Bragg grating mounted to a steel plate. READ MORE

  4. 13. Realistic Modelling of Ultrasound Sensing for Autonomous Vehicles

    University essay from Linköpings universitet/Elektroniska Kretsar och System

    Author : Houbo Ni; [2019]
    Keywords : Ultrasonic sensor; analog signal; experimental setups; measurement methods; impedance; MATLAB;

    Abstract : Ultrasonic sensors are popular in parking functions in automotive. They are used to measure distances between a car and obstacles near the car. Car companies need to prove that sensors are reliable before using them on vehicles since these sensors are safety-critical. READ MORE

  5. 14. Quality assessment of mineral wool insulation plates : Using ultrasonic non-destructive testing

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Linus Ikonen; Daniel Nilsson; [2019]
    Keywords : Non-destructive testing; linear ultrasound; mineral wool; fibrous materials; acoustics; frequency response; signal attenuation; Oförstörande provning; linjärt ultraljud; stenull; fibrösa material; akustik; frekvenssvar; signalförsvagning;

    Abstract : In the manufacturing process of mineral wool insulation plates, defects arise, such as unmelted base minerals and uncured binder which gets embedded within the plates. To be able to sort out these defective plates from a manufacturing line, a reliable quality assessment is needed. READ MORE

  6. 15. Automatic control of a model elevator based on NI LabVIEW and myRIO

    University essay from Uppsala universitet/Signaler och System

    Author : Anton Storfors; [2018]
    Keywords : LabVIEW myRIO FPGA;

    Abstract : This project aims to use the myRIO embedded device with programming development software, LabVIEW, for the education of automatic control in association with the course Control Engineering (Reglerteknik) in Uppsala University.  The myRIO is a portable reconfigurable I/O (RIO) device developed by National Instruments for students to use for designing control, signal processing, robotics, and mechatronics systems. READ MORE