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Structured light 3D camera systems are composed of a commercial video projector and a machine vision camera. High scan speed structured light 3D camera systems, suffers synchronization problems due to a mismatch in the projector screen refresh rate, and camera capturing speed. Commercial video projectors project with fixed refresh rate, frame rate of machine vision camera's increase or decrease with...
Phase-locked loops (PLLs) are very important in power and energy areas. Many PLLs have been proposed in recent literatures, and all these methods are to design a robust filter and let them be as a preprocessing tool before the synchronous reference frame PLL (SRF-PLL) input. Among these PLLs, a interesting PLL is Least-Error Squares (LES) Filter-Based PLL (LES-PLL), which is composed of a LES filter...
This paper presents a novel video stitching system for stitching multiple images with 4K and displaying them simultaneously. The key insight of the proposed system can be divided into two stages First, a image of super resolution, such as 16K/32K, and it can be divided evenly into 2×2 or 3×3…etc. Due to the parallelized GPU, we could decode these image simultaneously based on the DXT and JPEG compression...
As power level grows, the power converter of wind turbines tends to use parallel-connected smaller converters. The main reason for parallel is that modular design of those smaller converters is relatively mature and cost-effective. However, the parallel of GSCs (Grid-Side Converters) is notorious for its difficulty in control. Bulky and costly filtering capacitor bank is common and LCL resonance problem...
Future tactical communications involves high data rate best effort traffic working alongside real-time traffic for time-critical applications with hard deadlines. Unavailable bandwidth and/or untimely responses may lead to undesired or even catastrophic outcomes. Ethernet-based communication systems are one of the major tactical network standards due to the higher bandwidth, better utilization, and...
Time-Sensitive Networking (TSN) is becoming more important in automotive and industrial sectors. There is no clear strategy how to use TSN to improve and migrate the established real-time protocols without excluding legacy devices. This paper presents a realistic concept to integrate TSN into automation networks. We choose Sercos as a deterministic Industrial-Ethernet protocol to be extended with...
In the process of China's automated production, the upgrading and networking of old infrastructures becomes one of the key issues. With large quantity, numerous varieties and wide distribution, these infrastructures brings complex design work and high cost to network them into fieldbus, which greatly hamper the building of intelligent factories. This paper proposed an industrial-control solution to...
A novel ultrasound (US) platform with high channels density is a pre-requisite to open new frontiers in diagnostic and/or therapy by experimental implementation of new enabled advanced techniques. To date, few systems in the world permit to have a full and simultaneous control both in transmit and receive of all single elements of arrays with more than 1000 transducers. This paper presents a powerful...
This paper considers modifications of a real-time discrete wavelet transform and problems related to local signal parameters measurement. Furthermore this work proposes a good alternative for a wavelet decomposition architecture which could help to increase restore accuracy of local signals. It is shown that developed cascade algorithm with synchronization has minimal computational costs and provides...
Nowadays, one of the most challenging design issues of battery-driven real-time embedded systems is how to reduce energy consumption such that the battery life can be prolonged. Based on dynamic voltage scaling technology, many energy-efficient real-time task scheduling algorithms have been proposed, however, relatively little work is done in the presence of task synchronization. In this paper, energy-efficient...
With its ability to detect, identify and, if applicable, recover from occurred faults, online-diagnosis can help achieving fault-tolerant systems. A sound decision on an occurred fault is the foundation for fault-specific recovery actions. For this, typically a large amount of data has to be analyzed and evaluated. A diagnostic process implemented on a distributed system needs to communicate all those...
An electric network frequency (ENF) signal can be found in multimedia recordings due to propagation from the power grid. There a variety of applications based on ENF signal use, such as video and audio stream synchronization, and origin determination of multimedia recordings. In this paper, we propose the use of ENF to synchronize real-time audio streams from different, non-synchronized sound devices,...
This paper combines the design philosophies of synchronous and asynchronous, online and offline interactive teaching and learning environments to create a long-distance real-time educational support system based on intelligent perception (i-percieve), intelligent manageability (i-manage), intelligent interactive feedback (i-feedback), smart displays (i-view) and other core technologies. In addition...
A real-time data acquisition system for precision agricultural is presented. Using the system, the spatiotemporal data for the specific local area can be collected at small expense. A hardware frame is designed to take synchronized multi-view images of the target plants as well as environmental data. To monitor the growth of plants or crops, set of images are taken periodically and a multi-view stereo...
Real-Time VQA (Video Quality Assessment) is very important for the tracking antenna system on an analog television in the decision making related to the direction of the antenna. This paper proposes VQA system based on FIS (Fuzzy Inference System) that works in real-time to process information from analog signals on AV-Out television. The VQA system can be said to work well if the output results show...
Vehicle Management System (VMS) is onboard real-time network, which ensures the flight safety and economy by scheduling and managing the onboard resources. With the help of computers, local area network (LAN), simulation software and real-time operation system, we build a distributed computer simulation platform to simulate this onboard network. In this paper, we present a Simulink/RTX/Reflective...
More than two decades, circuit switched systems have been replaced by packet switched systems in telecommunication infrastructure. However, there are considerable amount of circuit switched equipment in telecommunication networks. Therefore, interconnection of existing circuit switched networks with packet switched networks is needed. For this reason, new methods are still being developed to transport...
A real-time learning analytics system is proposed for in-classroom use. We used an e-learning system and an e-book system to collect real-time learning activities during lectures. The collected logs were analyzed and presented visually on a web-based system for the teacher. The teacher can monitor how many students are viewing the same page as the teacher, whether they are following the explanation,...
This paper presents voltage sags detection methods based on PMU (Phasor Measurement Unit) measurements. Voltage magnitude, phase angle jump, frequency deviation and RO-COF (Rate of Change of Frequency) are continuously monitored during the sag phenomena in order to analyse the capability of PMUs for the sag disturbance detection. Real time simulations using RTDS (Real Time Digital Simulator) are used...
This paper presents a single-chip trinocular disparity estimation processor, capable of computing in real-time up to 2048×1080 resolution depth maps at 32fps with up to 256-pixel disparity range using two/three CMOS camera sensors. The most important feature of the presented design is that the chip is based on a trinocular adaptive window matching process that requires very limited on-chip memory,...
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