Browsing by Author "Salman Ahmed"

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    Generic framework for IPs with WIFI
    (UMT, Lhr, 2018) Muhammad Ramzan; Hafiz Daniyal Tariq; Salman Ahmed; Sohaib Roomi
    Indoor positioning system IPS works like Global Positioning System [GPS] is used to locate and track object and places. But the difference here is that as per the name of the proposed system, IPS is used to locate objects and places inside the buildings. Since there is no standard indoor positioning system on the market; we are trying to develop one. Like Google Maps, we are working to provide Single application for all indoor map that will be It has become a major field of research worldwide to work on and develop an accurate indoor positioning system since the previous 4 to 5 years. As GPS is fully evolved tracking and navigation system this system is available in many forms now a day, but the most developed and publically available is Google Maps. It is available as web applications and mobile application. It is free to use; and is very accurate. Now if we talk about modern architectures, buildings they cover vast squares of land i.e. huge shopping malls and airports. These places have sometimes complex inside pathways or huge corridors similar to each other, that people often get confused or get lost; and for the newcomer that would be a nightmare no matter of the signboards, GPS does not provide navigation through these buildings. There are some there are some locally available Indoor positioning systems that provide indoor positioning using different technologies i.e. RFID tagging, Bluetooth low energy [BLE] (HULTGREN & PAPATHANOPOULOS, 2014) beacon technology and wireless technologies, but they are highly expensive and some of them are also not very accurate. Now IPS provides a smart, handy and relatively cheap solution to this problem. It uses wireless routers to triangulate/locate points. It also provides 2D maps of the places/buildings, so that a person could easily navigate through. Our system will be less costly because we will use already deployed WIFI routers in the buildings; we will use them for triangulation and as direction beacon. This system consists of a mobile application, WIFI routers online database systems, and Google firebase platform. The app [Locator] is developed by using IDE Android Studio for android application development that uses Java as the default language for development.
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    Three phase pure sine wave inverter
    (UMT.Lahore, 2014) Salman Ahmed; Jawar-ul- Hassan; Hamza Ashraf
    Over the past two decades technological advancement in power electronics and an increasing demand for high performance industrial machinery has contributed to rapid developments in motor control and other heavy loads. There are different PWM techniques to control motor speed and heavy loads by changing voltage and frequency. From all these techniques SPWM Technique is best choice. SPWM Technique modulation is usually based upon conventional Six Switches Three Phase Inverter. We have introduced new idea by implementing three phase pure sine wave inverter based upon Six Switches inverter by using SPWM technique.For simulation we used Proteus and generated signals are sent to the gate drive circuit with the help of Controller and parameters are measured with the help of LAB VIEW.
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    Three phase pure sine wave inverter
    (University of Management and Technology, 2014) Salman Ahmed; Jawar ul Hassan; Hamza Ashraf
    Over the past two decades technological advancement in power electronics and an increasing demand for high performance industrial machinery has contributed to rapid developments in motor control and other heavy loads. There are different PWM techniques to control motor speed and heavy loads by changing voltage and frequency. From all these techniques SPWM Technique is best choice. SPWM Technique modulation is usually based upon conventional Six Switches Three Phase Inverter. We have introduced new idea by implementing three phase pure sine wave inverter based upon Six Switches inverter by using SPWM technique. For simulation we used Proteus and generated signals are sent to the gate drive circuit with the help of Controller and parameters are measured with the help of LAB VIEW.