Vastaanottoprosessin nopeuttaminen ja virheiden eliminointi RFID-tekniikan avulla

Työn tavoitteena oli tutkia ja kehittää saapuvan tavaran vastaanottoprosessia poistaen siitä Lean-oppien mukaisesti hukkaa. Kehitys tehtiin lisäämällä vastaanoton tiedonsiirtoautomatiikkaa, ja toteutus tehtiin RFID-tekniikan avulla. Tutkielman teoreettisena taustana ovat Lean-opit, joiden avulla tavoitteena oli eliminoida hukka, suunnitella vastaanottoprosessi uudelleen ja kehittää sitä edelleen. Keskeisenä tehtävänä oli löytää ne tekniikan valintaan vaikuttavat tekijät, joilla case-yrityksessä saatiin käyttövarma RDIF-tekniikka käyttöön. Tutkielmassa kerrotaan myös, miten tekniikan käyttöönotto toteutettiin. Lopuksi esitetään tuloksia ja päätelmiä uudistetusta prosessista ja kerrotaan niistä jatkotoimenpiteistä, joiden avulla teknologian käyttöä voidaan edelleen laajentaa. The aim of this study was analyze and develop the inbound receiving process of removing waste according of Lean-thinking. Development was done by raising inbound transmission automation implementation done by RFID- technology. The theoretical background was Lean –thinking; how to re-design process further development to eliminate waste. The main task was to find a reliable RFID- technology and the choice of technology factors were taken into account in the case company and how the technology was implemented. Finally, the presented results and conclusions of re-design process and possibilities to expand the technology to the case company processes.

Characterization of capacitive sensors for measurements of the moisture in irrigated soils

The irrigation is a technique developed to supply the hydric needs of the plants. The use of the water should be optimized so that the culture just has enough for its growth, avoiding waste. The objective of this work was to characterize the behavior of capacitive sensors of humidity to monitor the moisture in the soils. In first instance, it was appraised sensors with dielectric built of synthetic pomes stone (Rd = 0,4 and Rd = 0,8) and of soil samples (Rd = 0,8 and Rd = 1,0), being the Rd parameter a geometric factor that relates the distance between the capacitor plates with radius of the plates. For the calibration, the sensors were installed in PVC recipient of cylindrical shape, filled with soil. The set (sensor and soil) was humidified by capillary effect and submitted by a natural drying very slowly. The parameter readings were taken daily, which allowed obtain the curves relating the humidity percentage, expressed in terms of dry weight, with the output voltage fort the sensor. The experiments were performed in sand soil and in dark red latossolo. The obtained results allowed to infer that the behavior of the sensor has a specific feature for each type of soil, being, therefore, necessary to develop a own calibration curve for the sensor, when used in soil with specific characteristic.

RFID-teknologia ja kulunvalvontajärjestelmät

RFID on radioaaltoja hyväksikäyttävä langaton kommunikointitekniikka, jota käytetään tunnistamaan tunnisteella merkittyjä esineitä tai ihmisiä yksilöinä. RFID on jo pitkään ollut tunnettu tekniikka, mutta vasta viime vuosikymmeninä sitä on alettu hyödyntämään kaupallisesti eri sovellusaloilla. Kandidaatintyön tarkoituksena on tehdä yleiskatsaus RFID:n historiaan, järjestelmien osiin ja niiden toimintaan sekä kartoittaa RFID-markkinoiden nykytilaa ja lähitulevaisuutta sekä globaalilta kannalta että Suomessa. Lopuksi työssä tarkastellaan RFID-perusteisten kulunvalvontajärjestelmien perusominaisuuksia ja niiden toimintaa.

RFID-tekniikan mahdollisuudet hitsaavassa tuotannossa

Tämän työn tarkoituksena on tutustuttaa lukija RFID-tekniikan perusteisiin ja pohtia kuinka RFID-tekniikkaa voidaan hyödyntää hitsaavassa tuotannossa. Työssä selvitetään lyhyesti RFID-tekniikan historia, mistä RFID-laitteisto koostuu, mikä RFID-tekniikalle on olennaista ja mitä käyttömahdollisuuksia RFID-tekniikalla on osana hitsaavaa tuotantoa.

RFID-teknologia kulunvalvonnassa

Tämä kandidaatintutkielma on kirjallisuuskatsaus, joka käsittelee RFID-teknologian hyöndyntämistä kulunvalvonnassa. Työssä perehdytään pintapuolisesti itse teknologiaan, ja luodaan katsaus kulunvalvontaan. Työn pääaihe on kuitenkin kulunvalvonnan ja RFID:n yhdistyminen: miten RFID:tä hyödynnetään kulunvalvonnan toteutuksissa ympäri maailmaa. Työssä tarkastellaan RFID:n vahvuuksia, sekä heikkouksia kulunvalvonnan suhteen. Tämän lisäksi pyritään luomaan kuva nykyisistä ja tulevista implementaatioista. Viimeinen tärkeä työn osa-alue on turvallisuus. RFID:tä käytetään korkeankin turvatason kulunvalvontaratkaisuissa ja tällöin turvallisuuden maksimoiminen on ensiarvoisen tärkeää.

RFID-teknologian hyödyntäminen valmistavan teollisuuden toimitusketjuissa

Tässä työssä tutkitaan RFID-etätunnistusteknologian avulla saavutettavia merkittävimpiä hyötyjä valmistavan teollisuuden toimitusketjuille. Tavoitteena on kartoittaa saavutettavat hyödyt jo käytössä olevilla RFID-teknologian sovellutuksilla. Työssä esitellään RFID-teknologian perusteet ja käytössä olevat sovellutukset sekä toimitusketjujen yleisimmät riskit ja kustannustekijät. Käytössä olevilla sovellutuksilla saavutettavia hyötyjä verrataan toimitusketjujen yleisimpiin riski- ja kustannustekijöihin. Tutkimuksessa todettiin RFID-teknologialla olevan merkittäviä positiivisia vaikutusmahdollisuuksia toimitusketjujen tehokkaampaan ja taloudellisempaan toimintaan.

Food packaging indicators and sensors

Various categories of food packaging indicators namely; VTT, Ageless Eye, Mocon, Åbo Akademi and Impak were selected and incorporated into food trays manufactured at LUT packaging laboratory. Each of these food packaging indicators was used to investigate (visually and qualitatively) the transmission of oxygen through the seal, and tray material, as well as to detect microbial activity within the content of the package. Applications of different methods of gas flushing, content variation and introduction of two distinct levels of oxygen scavengers were employed as treatments to evaluate the packaging performance of the food packaging indicators. Ease of handling of each food packaging indicator was also taken into considerations. Findings showed that for packages, which contained chicken product, the amount of oxygen in the package, measured immediately after the sealing operation on the first day gradually decreased to zero percent by the third day of the storage period. The oxygen level remained at this point throughout the duration of storage for the chicken packages. Besides, level of oxygen in the packages without product continued to increase with the storage time, at moderate rate of 0.1% for 100%N2 and 0.3% for 30%CO2/70%N2 empty packages. More carbon dioxide gas was recorded for packages flushed with 30%CO2/70%N2. Results also revealed that visual analysis of one of the color indicators for example Ageless Eye, conformed to the data derived from the luminescence food-packaging indicator. This shows that packaging operation of the packaging line was considerably stable, and efficient with negligible exception. However, it was found that most of the food packaging indicators investigated in this research study exhibited considerable packaging challenges, such as, reaction with the content of the package (Impak); over sensitivity (Åbo Akademi and Impak); ease of handling problem (Åbo Akademi); and ease of activation problem (VTT indicators). In this study, the strengths and limitations of different indicators were analyzed. This study demonstrates the applicability of various indicators in MAP using chicken package application.

Map matching by using inertial sensors: literature review

This literature review aims to clarify what is known about map matching by using inertial sensors and what are the requirements for map matching, inertial sensors, placement and possible complementary position technology. The target is to develop a wearable location system that can position itself within a complex construction environment automatically with the aid of an accurate building model. The wearable location system should work on a tablet computer which is running an augmented reality (AR) solution and is capable of track and visualize 3D-CAD models in real environment. The wearable location system is needed to support the system in initialization of the accurate camera pose calculation and automatically finding the right location in the 3D-CAD model. One type of sensor which does seem applicable to people tracking is inertial measurement unit (IMU). The IMU sensors in aerospace applications, based on laser based gyroscopes, are big but provide a very accurate position estimation with a limited drift. Small and light units such as those based on Micro-Electro-Mechanical (MEMS) sensors are becoming very popular, but they have a significant bias and therefore suffer from large drifts and require method for calibration like map matching. The system requires very little fixed infrastructure, the monetary cost is proportional to the number of users, rather than to the coverage area as is the case for traditional absolute indoor location systems.

Depth sensors in augmented reality solutions. Literature review

The emergence of depth sensors has made it possible to track – not only monocular cues – but also the actual depth values of the environment. This is especially useful in augmented reality solutions, where the position and orientation (pose) of the observer need to be accurately determined. This allows virtual objects to be installed to the view of the user through, for example, a screen of a tablet or augmented reality glasses (e.g. Google glass, etc.). Although the early 3D sensors have been physically quite large, the size of these sensors is decreasing, and possibly – eventually – a 3D sensor could be embedded – for example – to augmented reality glasses. The wider subject area considered in this review is 3D SLAM methods, which take advantage of the 3D information available by modern RGB-D sensors, such as Microsoft Kinect. Thus the review for SLAM (Simultaneous Localization and Mapping) and 3D tracking in augmented reality is a timely subject. We also try to find out the limitations and possibilities of different tracking methods, and how they should be improved, in order to allow efficient integration of the methods to the augmented reality solutions of the future.

Optical and photoelectric properties of dry bacteriorhodopsin sensors

In this thesis, bacteriorhodopsin (BR) photosensor’s optical and electrical properties were studied. The BR sensor consisted of a dry film with BR in polyvinyl alcohol and covered with transparent conductors. In the experiments the BR photocycle was started with two lasers. The characteristics of the BR sensor were measured in two ways. The first approach was theoretical and it required knowing the laser parameters. The second way required assembling a measurement setup for the optical response measurements. However, no measurable results were obtained due to low laser power. The photoelectric response was measured in the experiments with two laser systems and the amplifier was tested. In the experiment with a Cavitar laser, the photoelectric response was obtained. In the experiment with FemtoFiber Pro laser, the photoelectric response was not measured. The expected amplitude of the response was obtained. The experimental data was analyzed and possible solutions for reducing the interference were given.

Perspectiva de la tecnología de comunicaciones RFID

Gestión del conocimiento

Modelo de canal y fuente de información para un sistema de control vehicular que utilizará tecnología RFID.

Tesis (Maestría en Ciencias de la Ingeniería Eléctrica con orientación en Control Automático) UANL, 2014.

Fabrication Of Potentiometric Sensors For The Determination Of Certain Metal Ions

In this study Fabrication of Potentiometric sensors for the determination of certain metal ions, presents the synthesis and characterization of seven ionophores, their use in the fabrication of potentiometric sensors and the results and discussion of fourteen sensors developed for the determination of five transition metal ions. As part of the present investigations a total of fourteen potentiometric sensors have been developed and fabricated. A three fold approach has been taken in developing he sensors, PVC plasticized membrane sensor, carbon paste electrode and chemically modified carbon paste electrode. All the sensors are highly useful in the determination of metal ions such as manganese, nickel, copper, mercury and lead. A through analytical study has been carried out with respect to each other developed. Based on these studies, optimum conditions have been developed for the quantitative determinations of the selected metal ions using the sensors. Systematic application studies have also been carried out for all the developed sensors and the results revealed that the presently developed sensors are far superior than most of the sensors reported.

Evanescent Wave Fibre Optic Sensors for Trace Analysis of Fe3+ in Water

In this communication, we discuss the details of fabricating an off-line fibre optic sensor (FOS) based on evanescent wave absorption for detecting trace amounts of Fe3+ in water. Two types of FOS are developed; one type uses the unclad portion of a multimode silica fibre as the sensing region whereas the other employs the microbent portion of a multimode plastic fibre as the sensing region. Sensing is performed by measuring the absorption of the evanescent wave in a reagent medium surrounding the sensing region. To evaluate the relative merits of the two types of FOS in Fe3+ sensing, a comparative study of the sensors is made, which reveals the superiority of the latter in many respects, such as smaller sensing length, use of a double detection scheme (for detecting both core and cladding modes) and higher sensitivity of cladding mode detection at an intermediate range of concentration along with the added advantage that plastic fibres are inexpensive. A detection limit of 1 ppb is observed in both types of fibre and the range of detection can be as large as 1 ppb–50 ppm. All the measurements are carried out using a LabVIEW set-up.