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Showing result 1 - 5 of 6 essays matching the above criteria.

  1. 1. PCBA verification and fault detection using a low-frequency GMR-based near-field probe with magnetic closed-loop feedback compensation : A non-contact alternative to physical probing

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Joacim Sundh; [2022]
    Keywords : GMR; sensor; magnetic field; near-field; probe; linearity; PCB; coil; PCBA; analogue integrated circuits; analog; operational amplifiers; electrical fault detection; feedback circuits; in-circuit tests; GMR; sensor; magnetfält; närfält; sond; linjäritet; mönsterkort; spole; kretskort; analoga integrerade kretsar; operationsförstärkare; elektrisk feldetektering; återkopplingskretsar; kretskortstest;

    Abstract : As electronics are getting both smaller and more advanced, the need to verify and validate remains and the means are getting more complex the more functions and components are added. Traditionally, in-circuit tests (ICTs) are performed by probing dedicated test points on the Printed Circuit Board Assembly (PCBA) in a test sequence that is unique to each product. READ MORE

  3. 2. Temperature sensing on a linear wear test rig for plastic components

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Anton Grahn; Sebastian Granlund; [2022]
    Keywords : Accelerated Life Testing; Wear; ALT; Thermocouple; Thin Film RTD; 3D-Printing; PA12; Heat Flow; Accelererad livslängdstestning; ALT; Förslitning; Termoelement; Film RTD; 3DUtskrivning; PA12; Värmeflöde;

    Abstract : För att verifiera att komponenter håller under en förväntad livslängd kan en Accelererad Livstids Testning (ALT) användas. En av huvudaspekterna som kan förstöra ett ALT-test av plastkomponenter är om kontakttemperaturen överstiger glasövergångstemperaturen. Detta eftersom det förändrar testkomponentens materialegenskaper. READ MORE

  4. 3. Non-contact measurement of heart rate using a camera

    University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

    Author : Jenny Berggren; Albin Berggren; [2019]
    Keywords : Technology and Engineering;

    Abstract : Measurements of heart rate without contact can be of much importance when the possibilities of skin contact for different reasons are limited, or for monitoring at distance over time. This is an emerging area in our time, and the idea to construct a working system to demonstrate the technique was therefore born. READ MORE

  5. 4. Measuring material properties of thin films with DIC and tearing test of laminate

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Peter Nilsson; [2017]
    Keywords : DIC; Thin polymer films; Laminated tearing;

    Abstract : Thin polymer materials are today widely used in industry and production. An ordinary food package can have around six different layers of materials laminated together to obtain the desired protection. To obtain an efficient usage of these materials simulations are often required. READ MORE

  6. 5. The possibility of utilizing the normal incidence reflection coefficient of acoustic waves to characterize and study porous granular layers

    University essay from KTH/Väg- och banteknik

    Author : Hailegiorgis Dinagdae Yared; [2011]
    Keywords : non-destructive testing; reflection coefficient; acoustic wave; porous granular;

    Abstract : currently operational non-destructive testing methods for pavements have many drawbacks that need improvement. This thesis investigates the possibility of utilizing the normal incidence reflection coefficient of acoustic waves in characterizing and studying of porous granular materials. READ MORE