The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In recent years, intelligent traffic system (ITS) and telematics system have become a popular issue for traffic safety, convenience and efficiency. The real-time and historical traffic and other roadside information is very helpful information and can be analyzed to give good telematics services and traffic controlling, such as navigation, traffic flow, weather, traffic prediction and so on. This...
In this paper, we present a framework based on 3D range data to solve the problem of simultaneous localization and mapping (SLAM) with detection and tracking of moving objects (DATMO) in dynamic environments. The basic idea is to use an octree based Occupancy Grid representation to model dynamic environment surrounding the vehicle and to detect moving objects based on inconsistencies between scans...
In the present paper, a comparison among different types of urban mass transport systems, which can be implemented for medium-sized cities, is reported. For each mobility system, advantages and disadvantages, in terms of transport capacity and environmental impact, are highlighted. Then the focus is pointed on the trolley-bus solution. A real case study of deployment of this type of mobility system,...
The performance of environment perception sensors plays an important roll for the effectiveness of advanced driver assistance systems (ADAS). This paper analyzes different methods for sensor model generation for effectiveness simulations and derives a new sensor model unifying the main advantages of common deterministic and stochastic approaches. As an example, the paper utilizes the new sensor model...
Emerging intelligent transportation systems (ITS) are based on several technologies. A new concept of integrating visible light communications (VLC) in ITS is introduced in this paper. VLC in ITS is a cost effective method of implementation. This paper presents a VLC broadcast system considering LED-based traffic lights. It discusses the integration of traffic light road side unit (RSUs) within the...
Intelligent vehicles provide several speech-based advanced features, which success rely on the robustness of the speech acquired by the vehicle microphone system. This speech can be enhanced with a microphone array by means of spatial filtering, which design needs a reliable noise model to guarantee good filtering performance. Traditionally, it has been assumed that this noise is diffuse, but different...
This paper proposes an electronic system to combat drifting and traffic noises in the urban area of Saudi Arabia. The proposed solution can be integrated into a smart city platform. The system comprises a sound processing hardware, a CCTV camera, and a GPRS module for wireless IP access. An algorithm to address drifting for noise and accidents is derived and tested over a range of audible traffic...
This article proposes an improved watershed algorithm based on morphological, using morphological open and close reconstruction to reduce the noise of image. Besides, with the Weber Perception Principle, it divides the morphological gradient image in the form of gray scale and non-linear and marked the gradient image with Watershed Algorithm. So it solved the over-segmentation problem of traditional...
The thermal effect on through-silicon via (TSV) noise coupling and S21 of TSV channel were measured in both frequency and time domain from corresponding TSV based passive chips. These measurement results are analyzed using the temperature-dependent TSV lumped model to TSV channel and shows good correlation with measurement. Under the hundreds-of-MHz frequency range, increasing temperature decreases...
In this paper we present a state estimation method based on an inertial measurement unit (IMU) and a planar laser range finder suitable for use in real-time on a fixed-wing micro air vehicle (MAV). The algorithm is capable of maintaing accurate state estimates during aggressive flight in unstructured 3D environments without the use of an external positioning system. Our localization algorithm is based...
In this study, a simulation environment has been developed to simulate signal characteristics of both underwater ambient noise and naval vehicles. This simulation environment will be used to develop algorithms for detection and classification of different naval vehicles. In the simulations, the ambient noise is modeled as Gaussian and non-stationary random process. Target radiated noise signals of...
This paper presents an improved positioning approach for cellular-network based mobile tracking in severe non-line-of-sight (NLOS) propagation environments. The proposed approach consists of two stages: the smoothing stage to suppress the NLOS errors in the distance measurements; and the position tracking stage. An improved distance smoothing method is proposed to significantly reduce the NLOS errors...
Due to the complementary nature of inertial navigation system (INS) and Wi-Fi positioning principles, an INS/Wi-Fi integrated system is expected to form a low-cost and continuous indoor navigation solution with better performance than using the standalone systems. In this paper, we explore the integration of Wi-Fi measurements with data from microelectromechanical systems (MEMS) based inertial measurement...
Doppler Velocity Logs (DVLs) are devices that have considerable and widespread use in maritime applications. They can be used to provide velocity information, with respect to the sea floor, about the vehicle on which they are mounted. The principle which they use to provide this information is, as their name suggests, the Doppler shifting of acoustic signals. This paper seeks to describe the potential...
The emergence of In-Wheel technology and the fact that an electric machine is embedded in each corner of an Electric Vehicle (EV) has profound effect on vehicle design. An electric motor is now available at each wheel and we show that the output of those motors can be used to eliminate the wheel speed sensor of a conventional ABS design. The paper analyses the transient behavior of the back EMF signal...
This paper deals with the development of image occupancy grid map based on image matching by cross correlation method from laser range finder (LRF) data and goes on to develop an algorithm for robust pose estimation of a mobile robot in the static environment. Scan represents, here, a set of range measurements of the features transformed into a binary image in the environment provided by a laser range...
External airbag installed in vehicle can protect pedestrians and reduce injuries in the event of a crash. In this paper, a collision prediction system for external airbag using an interacting multiple model is proposed to detect a collision and inflates quickly enough to cushion the impact. The system includes two different models, constant velocity and constant acceleration, in order to estimate...
We propose a power line communication (PLC) system for transmitting control signals in vehicle through internal power lines, such that the internal wires can be reduced and the vehicles can be lighter. The signals from different devices are multiplexed and modulated to the power lines by the transmitter. In the receiver, first the noise within power lines are filtered. Afterwards the multiplexed signals...
Electric vehicles and hybrid vehicles have been popularized in recent years. In such a vehicle, a PCU (Power Control Unit) which controls the power of electric motors is mounted. An inverter circuit which converts a direct current stored in the battery into an alternating current is included in the PCU. Due to the noise from the inverter, communication quality utilized on the vehicles is deteriorated.
In this paper we propose a decentralized coordination strategy that allows a dynamic multi-agent system to estimate a common reference point and achieve arbitrary spatial formations with respect to the estimated point. The method is robust against measurement noise of odometry or inertial navigation. We assume that the agents are mobile pointmass vehicles that do not have access to absolute positions...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.