Board Design Research Articles

Attenuate Influence of Parasitic Elements in 13.56-MHz Inverter for Wireless Power Transfer Systems

At 13.56 MHz, the circuit parasitic elements strongly affect the stability, performance, and efficiency of the inverter. In this paper, the effect of parasitic elements in the 13.56-MHz half-bridge inverter is analyzed in detail based on the point of view of the high-frequency ringing in the circuit. A proposed inverter design that aims to attenuate the influence of the parasitic elements is presented, including optimized printed circuit board (PCB) design and ringing damping design. The simulation and experiment results show that the proposed PCB design not only reduces the parasitic inductance in the ringing loop but also improves the stability of the inverter by avoiding the subresonant at low frequency and reducing the radiation electromagnetic interference noise. This paper also points out that the ringing current exists in the circuit even with the proposed optimized PCB design lead to the instability of the inverter at high voltage operating condition. The proposed damping circuit significantly suppresses the ringing in the circuit and improves the stability as well as the efficiency of the inverter. The experiment results confirm that by using the proposed design, the half-bridge inverter module using Silicon mosfet is stable at 13.56-MHz switching frequency and its efficiency obtains ${\text{93.1}}\%$ at 1.2-kW output power.

Highly scalable intelligent sensory application and time domain matrix for safety-critical system design

The designs of highly scalable intelligent sensory application—Ethernet-based communication architectures—are moving toward the integration of a fault recovery and fault-detection algorithm on the automotive industry. In particular, each port on the same network interface card design is required to provide highly scalable and low-latency communication. In this article, we present a study of intelligent sensory application for the Ethernet-based communication architecture and performance of multi-port configuration which is mainly used in safety-enhanced application such as automotive, military, finance, and aerospace, in other words, safety-critical applications. Our contributions and observations on the highly scalable intelligent behavior: (1) proposed network interface card board design scheme and architecture with multi-port configuration are a stable network configuration; (2) timing matrix is defined for fault detection and recovery time; (3) experimental and related verification methods by cyclic redundancy check between client–server and testing platform provide comparable results to each port configurations; and (4) application program interface–level algorithm is defined to make network interface card ready for fault detection.

범죄예방환경을 위한 CCTV 안내판 디자인개발 사례 연구

범죄예방환경을 위한 CCTV 안내판 디자인개발 사례 연구

User Experience Design of Stroke Patient Communications Using Mobile Finger (MOFI) Communication Board With User Center Design Approach

<p class="0abstract">Stroke has become a phenomenon in Indonesia. From 2014 to mid-2015, the disease is the first cause of death in Indonesia. This is of particular concern to the Ministry of Health so that the prevention, treatment, and prevention of stroke is further enhanced. The condition of stroke patients whose movements are limited is exacerbated by the psychic condition of patients who are unable to communicate pressure will cause obstacles to the healing process of the patient. This research proposes a stroke patient communication media by applying the technology of Mobile Finger Communication Board and user center design approach (UCD). This communication board is operated using the patient's fingers so that it is comfortable for everyday activities. Mobile Finger Communication Board Design based on five planes of user experience. The result of Mobile Finger Communication Board implementation shows that application usability level seen from perception and ergonomic point of view shows satisfaction index of the user at the satisfactory level so that it can be said that the system works with the satisfactory result of the users. It is expected that with a convenient Mobile Finger Communication Board can support the healing process of stroke so that the healing rate of stroke is increasing.</p><p class="0keywords"> <em></em></p>

Design and Usability Evaluation of Communication Board for Deaf People with User-Centered Design Approach

People interact their environment by communicating, but some limitation may exist such as hearing disability that occurs to deaf people. Usually, they communicate by using sign language. Unfortunately, there is various sign language in the world. This research is evaluating the usability of smartphone for communication board that can be used by deaf people to communicate to others, especially the people who don’t understand the sign language. Usability testing is to measure the user performance for mobile applications. The five criteria for the usability, according to Nielsen are learnability, efficiency, memorability, errors, and satisfaction. The study obtained the result of 88.36% of usability testing.

A compact perspiration meter system with capacitive humidity sensor for wearable health-care applications

This paper presents a compact wearable perspiration meter system using a 180-nm CMOS technology. With custom chip and board design, the proposed perspiration meter, which can measure a qualitative sweating rate, is integrated into 15 × 20 mm2. From the experimental results, the capacitances of the humidity sensors with analog-to-digital converter and band-gap reference circuits can operate accurately without hysteresis. In addition, a demonstration with simulated human skin is carried out to investigate the sensor’s performance under real environments. The proposed perspiration meter can output values equivalent to a conventional meter. As a result, it is verified that the proposed system can be used as a human sweat sensor for wearable application.

Design and Development of Multi-Transceiver Lorafi Board consisting LoRa and ESP8266-Wifi Communication Module

The advancement of Micro-Electro-Mechanical-Systems (MEMS), microcontroller technologies and the idea of Internet of Things (IoT) motivates the development of wireless modules (e.g. WiFi, Bluetooth, Zigbee, and LoRa) that are small and affordable. This paper aims to provide detailed information on the development of the LoRaFi board. The LoRaFi 1.0 is a multi-protocol communication board developed by Centre of Excellence for Advanced Sensor Technology (CEASTech). The board was developed for but not limited to monitor the indoor air quality. The board comprises two different wireless communication modules namely, Long-range technology (LoRa) and WiFi (using ESP8266). The board can be configured to communicate either using LoRa or WiFi or both. The board has been tested and the wireless communication operates successfully. Apart from LoRa, WiFi enables data to be forwarded to the cloud/server where the data can be stored for further data analysis. This helps provide users with real-time information on their smartphones or other applications. In the future, researchers will conduct tests to investigate the communication link quality. Newer version with reduced board size and additional wireless communication module will be developed in the future as to increase board flexibility and widen the range of applications that can use the board.

A STUDENT-DESIGNED LABORATORY COMPANION BOARD FOR A COURSE ON MICROPROCESSOR INTERFACING AND EMBEDDED SYSTEMS

Abstract – This paper describes the production and usage of a student-designed laboratory companion board for a core course on microprocessor interfacing and em-bedded systems in the Department of Electrical and Com-puter Engineering at Queen’s University. The companion board connects to existing digital-only hardware in order to provide analog-digital conversion and other features. The design and prototype implementation of the compan-ion board was pursued as a capstone design project by three students during the 2014-2015 academic session. The student designers had agreed from the outset to allow their intellectual property to be used for educational pur-poses. In mid-2015, a production run of 30 boards was completed. A total of more than 300 students then used the companion board in laboratory activity during the Fall 2015 and Fall 2016 terms. The introduction of this student-designed equipment into the laboratory has been a positive development that provides an example to stu-dents of how material learned in multiple courses can be integrated together to produce a valuable outcome.

Implementing Daily Safety Huddles in a Radiotherapy Department

Safety huddles (SHs) are an effective communication tool in healthcare, allowing front line staff the opportunity to raise awareness with issues relating to quality and safety. The purpose of this evaluation was to determine the feasibility of implementing SHs in a large radiotherapy (RT) centre. There was a 3-phase implementation process. Firstly, a working group comprised of leadership and front-line radiation therapists proposed a preliminary design for the SH process, designed a huddle board to facilitate SH discussion, and brainstormed potential challenges. Secondly, 10-minute SHs were piloted in selected clinical areas that represented diverse RT expertise, equipment and tasks (e.g. CT/MR simulation, treatment planning/delivery and specialized work areas such as brachytherapy). SHs were held daily for one week. Frontline staff were mentored and supported by “huddle champions.” Thirdly, post-implementation interviews were used to evaluate the huddle process and generate lessons learned prior to widespread departmental implementation. Benefits included: improved team communication through a protected pause in the day; a standard method for identifying, documenting and escalating issues relating to clinical quality, safety, delivery and efficiency; and an organizational commitment to promoting safety culture. Challenges included: logistics of gathering team members from various practice areas; difficulties working with the analog huddle board; staff reluctance to “stop and pause”; reduced frontline capacity; and the need to adjust huddle timing to accommodate patient and team needs. Design of the visual huddle board was validated, logistics of huddle timing and coordination were determined, and staff buy-in for the huddle process was established. This evaluation confirmed that huddles could be implemented across a large RT centre with different practice environments. Future considerations for refinement of the process included development of a method to track, communicate, and resolve issues identified by huddles, with staff favoring a digital solution.

Printed Circuit Board design for Inverting Summing Amplifier using CADENCE

Printed Circuit Board design for Inverting Summing Amplifier using CADENCE

Design of Energy Saving Board Based on Wireless Technology

This system based on NRF905 transceiver chip technology, the design breaks down into three parts to design, consisting of a single-chip microcomputer system section, press section and display components. Divided into two parts, part of the system display, other lamp control ends. Street light control terminals and system monitor nrf905 multi-point wireless data transmission, controlled by host part, set the time, number lighting conditions have bright lights and other functions. NRF905 wireless transceiver chip for data sent and received. Finally, after experimental verification, this design can be combined effectively, strong anti-jamming ability, perfect function, can be used in street light control.

Improving the Design of the Grain Combine Harvester Cleaner

The work of the air-and-screen cleaner of a grain combine harvester is considered. Flows of grain–straw heap supplied for cleaning are evaluated. The methods of splitting the heap into grain and nongrain parts are described. To improve the work of the grain combine harvester cleaner, several design solutions are proposed that make possible an intensified fractionation of straw-grain heap. In the modified design of the lipped screen, the combs of the upper working sections of neighboring louver boards are offset by one half of the comb pitch. This makes it possible to improve, at an intensive heap supply, the transporting capacity of the straw particles en route to the cleaner exit. An S-type design of louver boards is proposed for a more efficient utilization of air flow in the cleaning system. These boards have a low air flow resistance and allow achieving an air flow with better aerodynamic characteristics (speed, uniformity, directionality), which makes it possible to run the combine harvester cleaning system with lower grain losses.

Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

For the upcoming upgrade of the forward muon stations of the ATLAS detector, 1280m2 of Micromegas chambers have to be constructed. The industrialization of anode board production is an essential precondition. Design and construction methods of these boards have been optimized towards mass production. In parallel quality control procedures have been developed and established. The first set of large size Micromegas anode boards has finally been produced in industries and demonstrates the feasibility of the project on full-scale.

Ultraino: An Open Phased-Array System for Narrowband Airborne Ultrasound Transmission.

Modern ultrasonic phased-array controllers are electronic systems capable of delaying the transmitted or received signals of multiple transducers. Configurable transmit-receive array systems, capable of electronic steering and shaping of the beam in near real-time, are available commercially, for example, for medical imaging. However, emerging applications, such as ultrasonic haptics, parametric audio, or ultrasonic levitation, require only a small subset of the capabilities provided by the existing controllers. To meet this need, we present Ultraino, a modular, inexpensive, and open platform that provides hardware, software, and example applications specifically aimed at controlling the transmission of narrowband airborne ultrasound. Our system is composed of software, driver boards, and arrays that enable users to quickly and efficiently perform research in various emerging applications. The software can be used to define array geometries, simulate the acoustic field in real time, and control the connected driver boards. The driver board design is based on an Arduino Mega and can control 64 channels with a square wave of up to 17 Vpp and /5 phase resolution. Multiple boards can be chained together to increase the number of channels. The 40-kHz arrays with flat and spherical geometries are demonstrated for parametric audio generation, acoustic levitation, and haptic feedback.

Innovative design of ironing board based on Kansei Engineering and usability test

Laundry business is popular service business in Indonesia that mostly involve muscle activity for lifting and ironing activity. It causes the worker get muscular fatigue and injury especially for ironing activity that is included in the static and monotonous activity. moreover, existed ironing board design in the market is not easy to be adjusted to standing or sitting position of workers. Hence, this paper aimed to design the innovative and adjustable ironing board to minimize the musculoskeletal complaint. The preliminary study is conducted by NBM questionnaires found that fatigue experienced mostly in the back, right upper arm, and calves. The product designed by Kansei engineering to satisfy consumer's feeling and assessed by USE questionnaire to fulfil consumer's usability. Orthogonal array and conjoint analysis were conducted to incorporate all attribute potentials in developing a new single concept design. Statistical analysis was also done to test the hypothesis. 80 respondents have participated in this study. The result of this study is an innovative design of ironing board which is valid to meet consumers' needs such as comfort, secure, attractive, sturdy, durable and multifunction and practical at 5% of the significant level.

Augmented reality of traditional food for nutrition education

This study aims to develop an augmented reality medium of traditional Sundanese food for nutrition education for teenagers. The media designed also consists of values of local wisdom education. The application is named AR Ma'Ugiz. The making of the application starts with story board design, 3D objects of traditional Sundanese food design using blender software and making videos about the making of the food. To make the videos, this paper uses Wondershare Filmora software. In an attempt of making AR Ma'Ugiz compatible to many platform, a Unity 3D is employed. The results of the research show that Augmented Reality designed to introduce traditional Sundanese food to teenagers is interesting and fun for them. In addition, the teenager students have more opportunities to explore the food in terms of the making procedure and nutrition information. Thus, the media used in nutrition education appear to have strengths in introducing values of local wisdom. In the meantime, local wisdom plays an important role in character education which, in this context, enables students to love their culture, including their traditional food.

PZT 구동 오차 저감을 위한 제어보드 설계

PZT 구동 오차 저감을 위한 제어보드 설계

Crash-test dummy and pendulum impact tests of ice hockey boards: greater displacement does not reduce impact

BackgroundOne injury mechanism in ice hockey is impact with the boards. We investigated whether more flexible hockey boards would provide less biomechanical loading on impact than did existing (reference) boards.MethodsWe...

Latest generation interconnect technologies in APEnet+ networking infrastructure

In this paper we present the status of the 3rd generation design of the APEnet board (V5) built upon the 28nm Altera Stratix V FPGA; it features a PCIe Gen3 x8 interface and enhanced embedded transceivers with a maximum capability of 12.5Gbps each. The network architecture is designed in accordance to the Remote DMA paradigm. The APEnet+ V5 prototype is built upon the Stratix V DevKit with the addition of a proprietary, third party IP core implementing multi-DMA engines. Support for zero-copy communication is assured by the possibility of DMA-accessing either host and GPU memory, offloading the CPU from the chore of data copying. The current implementation plateaus to a bandwidth for memory read of 4.8GB/s. Here we describe the hardware optimization to the memory write process which relies on the use of two independent DMA engines and an improved TLB.

High power printed circuit board design for automotive fuse block usage

El cálculo del tamaño mínimo de un conductor eléctrico es siempre el primer punto de interés al momento de diseñar una tablilla eléctrica de alta potencia; en este artículo se presentan los factores considerados para calcular el tamaño del conductor, las fórmulas matemáticas utilizadas, la revisión del estado del arte y las reglas de conservación definidas para proteger los circuitos de una sobrecarga eléctrica; asimismo se presentan dos métodos para definir el tamaño del conductor, uno basado en estándares internacionales (método actual) y otro basado en supuestos de diseño que reducen las reglas de conservación para calcular el tamaño del conductor (método propuesto), además se presentan los resultados de las pruebas de validación y los análisis estadísticos que respaldan la implementación del método propuesto en el diseño de las tablillas eléctricas de alta potencia utilizadas en centrales eléctricas destinadas a la industria automotriz y que ofrece una reducción del 33% del contenido de cobre de las tablillas eléctricas de alta potencia en comparación con el método de diseño actual.