Low cost robotic endoscope design considerations

2016 ◽  
Author(s):  
Riaan Stopforth ◽  
Shaniel Davrajh ◽  
Kaspar Althoefer
Keyword(s):  
Low Cost ◽  
Design Considerations ◽  
Robotic Endoscope

scholarly journals Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 917
Author(s):  
Ickjin Son ◽  
Grace Firsta Lukman ◽  
Mazahir Hussain Shah ◽  
Kwang-Il Jeong ◽  
Jin-Woo Ahn
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
Magnetic Characteristics ◽  
Switched Reluctance Motors ◽  
Switched Reluctance ◽  
Design Considerations ◽  
Cooling Fan ◽  
Cooling Fans ◽  
Power Switches ◽  
Selection Of

Switched reluctance motors (SRMs) are simple in structure, easy to manufacture, magnet-less, brushless, and highly robust compared to other AC motors which makes them a good option for applications that operate in harsh environment. However, the motor has non-linear magnetic characteristics, and it comes with various pole-phase combinations and circuit topologies that causes many difficulties in deciding on which type to choose. In this paper, the viability of SRM as a low-cost, rugged machine for vehicle radiator cooling fan is considered. First, necessary design considerations are presented, then three commonly use types of SRM are analyzed: A 3-phase 6/4, 3-phase 12/8, and a 4-phase 8/6 to find their static and dynamic characteristics so the most suitable type can be selected. Simulation results show that the 8/6 SRM produces the highest efficiency with less phase current which reduces the converter burden. However, with asymmetric half bridge converter, eight power switches are required for 8/6 SRM and thus put a burden on the overall drive cost. As a solution, the Miller converter with only six switches for four phase SRM. To verify the proposed idea, the 8/6 SRM was manufactured and tested. The results show that Miller converter can be used for the proposed SRM with slightly reduced efficiency at 80.4%.

scholarly journals A PROGRAMMABLE IRREGULAR WAVE GENERATOR

1974 ◽  
Vol 1 (14) ◽  
pp. 18 ◽  
Author(s):  
Norman B. Webber ◽  
Colin D. Christian
Keyword(s):  
Low Cost ◽  
Irregular Wave ◽  
Design Considerations ◽  
Wave Generator

An account is given of the various design considerations in the development of a low-cost programmable wave generator for a laboratory channel. The ability of this equipment to reproduce prototype spectra is critically discussed.

Intelligent product manuals

2000 ◽  
Vol 214 (5) ◽  
pp. 411-419 ◽  
Author(s):  
D T Pham ◽  
S S Dimov ◽  
B J Peat
Keyword(s):  
Selection Criteria ◽  
Low Cost ◽  
General Design ◽  
Design Considerations ◽  
Knowledge Based ◽  
Operation And Maintenance ◽  
Support Costs ◽  
Intelligent Product ◽  
The Creation ◽  
Active Assistance

Intelligent product manuals are designed to allow product users to utilize a product as easily, effectively and with as little additional care as possible while minimizing support costs for manufacturers and suppliers. It is first shown how intelligent product manuals address these objectives by utilizing electronic, multimedia and knowledge-based technologies to provide active assistance to the user of the product during tasks such as installation, operation and maintenance. An architecture for the creation and deployment of an intelligent product manual is then proposed and general design considerations are outlined. Finally, four implementation approaches, based on XML, SGML, HTML and PDF technologies, are compared against a set of selection criteria. It is concluded that simple, low-cost solutions are available, which can provide significant benefits for appropriate businesses, including smaller companies.

Design considerations for the hot embossing of microstrip antennas on plastic foils

2009 ◽  
Vol 1 (4) ◽  
pp. 249-254
Author(s):  
Andreas Kilian ◽  
Michael Fuchs ◽  
Lorenz-Peter Schmidt
Keyword(s):  
Millimeter Wave ◽  
Low Cost ◽  
Three Dimensional ◽  
Hot Embossing ◽  
Microstrip Antennas ◽  
Design Guidelines ◽  
Printed Antennas ◽  
Design Considerations ◽  
Radar Applications ◽  
Plastic Parts

In this contribution, fundamental design considerations for a novel metallization technique to realize millimeter-wave microstrip structures are presented. This hot embossing technology is a fast and economic process originating from the production of three-dimensional molded interconnect devices. Conductive structures are coated onto plastic parts or plastic foils using a heated stamp. This approach shows high potential and therefore will be investigated for the fabrication of low-cost printed antennas at millimeter-wave frequencies. The focus of this contribution is on design guidelines considering process parameters and interactions with substrate and copper foil characteristics derived from the fabrication and measurement of single microstrip patch antenna prototypes for radar applications in the industrial, scientific and medical (ISM) band at 24 GHz. Far-reaching potential lies in the utilization of the three-dimensional manufacturing technology for the construction of conformal integrated antenna systems based on the thermoforming capabilities of polymer substrates.

scholarly journals Design Considerations of Lightweight Block Ciphers for Low-Cost Embedded Devices

2019 ◽  
Vol 8 (2) ◽  
pp. 171-176
Keyword(s):  
Internal Structure ◽  
Low Cost ◽  
Resource Constraint ◽  
Fast Diffusion ◽  
Code Size ◽  
Embedded Devices ◽  
Design Considerations ◽  
Resource Requirements ◽  
Lightweight Cipher ◽  
Smart Computing

In the 21st century, Internet of Things (IoT) has become pivotal technology and has attracted worldwide attention in the smart computing environment. In order to enjoy the benefits of this new environment, security is considered as the main aspect in constrained end nodes. Ordinary cryptographic solutions are not sufficient for resource constraint devices. To fulfill this gap, a relatively new field of cryptography called lightweight cryptography came into existence. Furthermore, designing lightweight ciphers especially software oriented poses some significant limits and inherent conditions. Some design considerations of a lightweight encryption algorithm and tradeoffs for minimizing resource requirements are presented in this paper. Also, for a cipher, it is necessary to provide strong resistance against attacks. In this paper different countermeasures to prevent from attacks is also presented. By considering the performance-enhancing ideas presented in this paper, a new GFN based lightweight block cipher is proposed. A cipher design has two main parts; internal structure and key schedule. The internal structure of the proposed design has three layers in which operations are so arranged that it utilizes small code size and has fast diffusion. Besides, design of newly proposed cipher is such that it thwarts the effect of most of the attacks. In the nutshell, this paper serves as a base for designing good lightweight cipher for resource constraint smart IOT environment.

Design considerations, analysis, and application of a low-cost, fully portable, wearable polymer optical fiber curvature sensor

2018 ◽  
Vol 57 (24) ◽  
pp. 6927 ◽  
Author(s):  
Arnaldo G. Leal-Junior ◽  
Anselmo Frizera ◽  
Leticia M. Avellar ◽  
Maria José Pontes
Keyword(s):  
Optical Fiber ◽  
Low Cost ◽  
Polymer Optical Fiber ◽  
Design Considerations ◽  
Curvature Sensor

Practical Design Considerations of a Low Cost Variable Speed Drive

2006 ◽  
Author(s):  
N. D. Amarasinghe ◽  
R. L. Peiris ◽  
E. L. De Silva ◽  
G. K. A. Kumara ◽  
S. Kumarawadu ◽  
...  
Keyword(s):  
Low Cost ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Design Considerations ◽  
Practical Design

Design of a Recirculating Water Tunnel for the Study of High-Reynolds Number Turbulent Boundary Layers

2015 ◽  
Author(s):  
Libin Daniel ◽  
Shahrouz Mohagheghian ◽  
Dalton Dunlap ◽  
Eric Ruhlmann ◽  
Brian R. Elbing
Keyword(s):  
Reynolds Number ◽  
Boundary Layers ◽  
High Reynolds Number ◽  
Low Cost ◽  
Turbulent Boundary Layers ◽  
Regulation System ◽  
Water Tunnel ◽  
Overall Design ◽  
Design Considerations ◽  
High Reynolds

This paper reports on the design and fabrication of a high-Reynolds number recirculating water tunnel, which will be used primarily for the study of turbulent boundary layers with an emphasis on drag reduction applications. The primary design specifications were (i) achieve a momentum thickness based Reynolds number above 10,000, (ii) maximize optical access, and (iii) minimize flow non-uniformity. This paper discusses the design considerations and procedures to meet each of these design criteria as well as the manufacturing of the components, installation, and design of auxiliary systems such as the pressure regulation system. There are several recirculating water tunnels at universities that can achieve comparable Reynolds numbers, but they were either built with at least double the budget of the current project or are refurbished tunnels from other laboratories (i.e. key design considerations were already fixed). Thus, the current work offers a guide for the overall design of a low-cost, high-Reynolds number water tunnel. A brief review of other recirculating high-Reynolds number water tunnels is included. Currently, installation has begun with the fabrication complete.

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