Ercument Turk

A service oriented passenger counting application for public transportation systems

Today, fare collection systems are quite widely used in public transport vehicles. The public transportation system managers need to follow numbers of people in the vehicle instantaneously. Information such as passenger movement in bus stops, the occupancy rate of routes, the number of stowaways can be achieved with passenger counting systems. The number of boarding on vehicles can be obtained with the number of cards that are used. However, the number of people in the vehicle varies due to many factors such as without card entries, passengers that getting off from vehicles. In this study, a system that instantaneously monitoring the number of people in public transport vehicles has been developed using service oriented architecture. Services are designed in RESTful web service structure. This developed system is an innovative method of using web services for embedded systems running at the field. This system, which is integrated in public transport, has been tested with high number of devices in the field and the system has been optimized.

An embedded multiple sound support application for fare collection systems

Today, fare collection systems are frequently used in public transport. In these systems, some operations such as payment and system management are performed by the driver computer devices. Passengers need to be alerted and informed during these operations. In this study, a multiple sound system needed in fee collection systems have been implemented by an embedded system that includes a microprocessor. All hardware and software developments have been done in the system and necessary applications have been developed.

A study on the use of device tree structures for embedded software development

Embedded systems with microprocessors require many hardware information such as clock speed, port name, and device address to be entered into the operating system cores. In the classic compilation process for operating system kernel, all features, that the embedded system supports, need to be included in the source code. The kernel of the operating system must be recompiled for each software development process which considers related information about these features. In systems that have hundreds of different features, this process is time consuming and causes high cost as expected. Use of Device Tree data structure for the specification of physical components in embedded systems may facilitate this software development process since the kernel of the operating system is compiled just once in case of applying a development process based on this data structure. In this study, a methodology for the development of embedded software with using the Device Tree structure is introduced. New methodology is compared with existing software development approach and a preliminary evaluation is performed with taking into account pros and cons of applying this new methodology.

Boot time optimization for Android-based embedded systems

Android is an open source operating system which is becoming increasingly popular in embedded systems that are used both in consumer electronics and industrial environments. In order to be able to respond to both user and manufacturer requests, Android have a very flexible and complex structure. This is especially the cause of the prolongation of the boot time. In general, an Android device takes about 40 seconds to boot. This work is seeking a solution to the need for optimization of the previously developed Android-based embedded system boot-up time. As a result, 48% efficiency was achieved with the applied method and the boot time decreased to 19 seconds.