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Posted by : Francis on Thursday, July 03, 2008 - 04:29 AM EST |
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ControlDraw is software for designing process control systems and producing all the life cycle documentation for such systems, including DCS and PLC/SCADA
It is used in the chemical, pharmaceutical and food industries in particular..
I am the author and owner of the software and the company, and I shall be visiting Australia again in Jan 2009.
I am keen to meet Australian Engineers to show you ControlDraw.
Please contact me in you are interested.
Regards
Francis
www.controldraw.co.uk
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Posted by : instruite on Wednesday, April 16, 2008 - 05:58 AM EST |
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Hello all,
Recently I have moved our site to a new web server and upgraded few things. The new server will improve speed and performance of the website.
The upgrade seems to be working fine with my initial testing, but since this site is almost 2 years old now and there are many things on this site so its not feasible for me to check each and every link. So I will request the help from members to keep the site working without any bugs.
In case you note any problem any link not showing up post the problem in reply to this post or in the Feedback/Suggestions/Comments Forum.
Thanks in advance for you help.
Instruite
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Posted by : nita on Friday, January 11, 2008 - 10:43 AM EST |
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Siemens is banning pollutant materials from its electronic components and computers. As reported in the research magazine Pictures of the Future, the company is replacing pollutants such as lead and bromine in its circuit boards with materials that are more environmentally acceptable. In addition to other applications, the environmentally friendly components are being used in a special industrial PC that also consumes a minimum amount of energy and is 90-percent recyclable.
Circuit boards hold processors, which are central components of electronic devices. Processors can be found in coffee machines, computer tomographs, and even power plant control centers. The boards contain pollutants, including lead — a substance Siemens has been voluntarily removing from its products for several years now. In 2006 a directive was issued by the European Union that bans lead in many electronic devices, which is why researchers at Siemens Corporate Technology in Berlin continue to work on optimizing production of lead-free soldered circuit boards.
Over the long-term, Siemens is also seeking to go beyond legal requirements by replacing flame retardants containing bromide, because such materials can release cancer-causing substances in the event of a fire. The company is replacing the pollutants as much as possible with phosphorous organic compounds that pose less risk in terms of health, but nevertheless also prevent smoldering fires from occurring in the event of a short circuit.
Fujitsu Siemens Computers has already installed such low-pollutant elements in a special PC it manufactures, and all components in the “green PC” produced by Siemens or commissioned by the company are guaranteed to be free of lead and bromine. The computer, which is produced for major customers, also consumes very little energy — in some cases less than that required by a conventional 60-watt light bulb. It’s also nearly completely recyclable. The eco-PCs have been a big success in Scandinavia especially, not least due to the fact that the Nordic Swan environmental certificate now used there has very strict requirements, and the green PC is currently the only computer in the world that can meet them
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Posted by : IIT-Kanpur on Tuesday, December 04, 2007 - 08:15 PM EST |
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Hello Friends,
IIT Kanpur is organizing its Annual International Science and Technology Festival
TECHKRITI’08 from 14th-17th Feb 2008.Its amongst the largest technical festivals in asia.
for details and registration DO visit:
"www.techkriti.org"
Watch Techkriti promo. Video -
"http://www.youtube.com/watch?v=MJBppLt5spI"
Lecture Series at techkriti'08,
Dr. Peter Grunberg - Nobel Prize in Physics, 2007
Kevin Warwick - The First Human Cyborg
Harsh Manglik - Chairman and MD, Accenture, India
and many more to come..
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Posted by : nita on Sunday, October 14, 2007 - 11:47 AM EST |
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30.09.07 | The United Kingdom’s broadcasters are getting equipped for the digital age. Siemens is installing integrated digital production systems at the broadcasters ITV and BBC. In the future, the editors will edit their reports on the PC, and will be able to access the archives, research, cut and provide the finished report to production all from the same place. The result will be more current reports and more flexible program production.
Experts believe that Germany will have digitized the broadcasting of radio and television by 2010. Many broadcasters already use transmission technologies such as Digital Video Broadcasting (DVB) or the high-resolution High Definition TV (HDTV) and label them future international transmission standards. Nonetheless, production in many broadcasting institutions is still mainly carried out using time-intensive analog technologies — with tapes, cassettes, cutting rooms and archives piled high with material. In order to optimize the production processes, the largest private British television station ITV has recently commissioned Siemens IT Solutions and Services to carry out the installation of a digital production system. The contract includes a central database and a video server linked to the ITV studios. This will enable the various production locations to exchange material in a matter of seconds, and make their production operations both faster and more economical.
The BBC, the world’s largest broadcasting institution, in contrast, intends to digitize all of the Corporation’s processes by 2010. The broadcaster commissioned Siemens with the successive digitization of the complete institution as early as 2004. This not only includes comprehensive solutions for end-to-end digital production and the technical equipment for a new transmission center in Scotland, but also the establishment of a high-performance network with a bandwidth that will be 400 times higher than at present. The BBC will be able to operate all of its IT services with even higher performance and cost-effectiveness. Siemens will initially support the solution at ITV for three year, while the BBC contract, with a total volume of around €2.7 billion runs for a total of ten and a half years. In order to be able to implement the digitization of the complex transmission infrastructure without problems, Siemens has taken over the BBC’s own IT subsidiary — BBC Technology — with its 1,400 employees.
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Posted by : nita on Sunday, October 14, 2007 - 11:37 AM EST |
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13.10.07 | Siemens will develop a compressor that will allow Statoil, Norway’s leading oil and natural gas company, to extract contaminated natural gas from below the ocean floor. Such a system would make it possible to exploit fields of previously non-extractable gas, which would in turn help to make this source of energy available for a longer period than currently forecasted. A test facility is scheduled to go into operation in late 2008. A key element in the extraction of natural gas, compressors compress gas to pressures as high as 1000 bar, making it possible for the gas to be injected or transported in pipelines over long distances. Today’s compressors consist primarily of a motor, compressor, transmission, and magnetic bearings that are sealed using dry gas seals. Gas will escape through these seals however. This is one reason it was previously impossible to extract natural gas made poisonous as a result of contamination with pollutants such as hydrogen sulfide. About one third of the world’s natural gas reserves contain such impurities. In 1999, Siemens Power Generation (PG) and Shell Global Solutions began to develop a compressor that makes it possible to create applications using toxic contaminated natural gas. To achieve this goal, the experts incorporated the individual components of the compressor into a self-contained vertical casing. The result was not just a compact, space-saving design, but also a system that prevents poisonous fumes from escaping before they are safely eliminated by a downstream treatment plant. The compressor, known as the ECO-II, has been in use with good success in a small Dutch town near Groningen since 2006.
Statoil has now commissioned Siemens to enhance the ECO-II system, with the aim of using this compressor technology directly on the ocean floor, where the majority of the contaminated natural gas fields are located. To enable the compressor to withstand the extreme conditions, Siemens is currently enhancing the system’s structural robustness while also improving it to ensure maximum availability and minimum maintenance.
The new compressor will also make it possible to extract more gas than previously. Whereas offshore production rigs still need to use the natural pressure of gas in order to bring it to the water’s surface, the new system will also be able to use low-pressure natural gas that it compresses directly on the ocean floor.
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Posted by : instruite on Sunday, September 09, 2007 - 06:51 PM EST |
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MILWAUKEE, Sept. 6, 2007 - To help OEMs, end users and electrical contractors select Allen-Bradley component products and design application solutions using those products, Rockwell Automation has created the Product Selection Toolbox, a comprehensive suite of product selection and system design software tools. These tools are available online or can be installed on customers' computers to quickly access information while in the office or on the go.
Available free of charge to Rockwell Automation partners and customers, the Product Selection Toolbox offers users easy access to the complete line of Allen-Bradley products, as well as configuration tools and CAD drawings. Although an Internet connection is not required, users who want to take advantage of the available update capabilities can employ the Internet for real-time access to the latest product information.
This single source for automation components allows for simplified product selection and ordering. Purchase requests can be submitted directly to a local Allen-Bradley distributor for quick and efficient product delivery.
In addition, the Product Selection Toolbox provides users with extensive configuration and time-saving capabilities. Customers can design and develop automation systems, motor control centers and motion control systems directly using system design tools included in the software.
The following programs can help customers to better visualize and select custom components for improved system design:
- ProposalWorks - contains a wealth of product information, creates custom proposals and requests for quotes more quickly and accurately
- Integrated Architecture™ Builder - develop an accurate bill of materials for custom-configured, Logix-based systems that include automation system components
- CenterONE - reduces design time to configure motor control centers
- MotionAnalyzer - receive assistance while developing motion control solutions in selecting the correct motor, drive and gearbox combinations
- eCADWorks - the ultimate source for CAD-like drawings of Allen-Bradley brand products for use in CAD or non-CAD applications
- MCS Star - designs MCS bus systems complete with mounting system assemblies for MCS starters
- RailBuilder - simplifies the design of custom terminal block rails and can automatically identify and place the appropriate jumpers, barriers and prints full reports
The Product Selection Toolbox currently is available through local Rockwell Automation sales offices or distributors worldwide and is available for download on the company's website.
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Posted by : nita on Monday, July 16, 2007 - 10:57 AM EST |
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Rail travel is about to become quieter and more environmentally friendly. That’s because Siemens has developed the first concept to combine drive, running gear, and brake technology. The innovation also dispenses with components that generate noise and are particularly subject to wear and tear, such as a gearbox. What’s more, the compact drive system is 20 percent more energy-efficient than its predecessor. As the research magazine Pictures of the Future reports, Siemens is currently testing the system in the Munich subway.
The motors that power today’s rail vehicles run continuously at high rpms, so a gearbox is needed to convert this power to the slower-running wheels, and the resulting friction losses increase energy consumption and wear. The open-circuit air-cooled asynchronous motors most commonly used today feature many roller bearings and rubber parts that require regular maintenance.
Now, Siemens Transportation Systems (TS) has introduced Syntegra, a rail drive system characterized by a degree of integration unrivaled worldwide. The experts have integrated not only the running gear and brake system into the bogies of the Munich subway trains, but also a gearbox-free direct drive. Aside from two roller bearings, which simultaneously serve as wheel set bearings, the motor contains no parts that are subject to wear, thereby saving costs and increasing service life. An enclosure protects the motor’s interior from dirt and moisture and reduces noise to a minimum — because a traction motor ventilator is no longer needed, for example. The motor technology, which relies on high-performance permanent magnets, has the advantage that it is fail-safe, and the motor can be used as a safe electric second service brake.
Syntegra also is 15 percent more compact and 30 percent lighter than its predecessor. That means energy efficiency can be increased by as much as 20 percent. Used in a four-car subway train in typical service, Syntegra can deliver annual savings of 340,000 kilowatt hours — the equivalent of the energy consumed in one year by about 100 households.
Even before the series production stage, the running gear has demonstrated its impressive performance: In June the TS experts were honored for their fully scaleable system with the “Intelligence for Transportation and Logistics” Innovation Award presented by the Center for Transportation & Logistics Neuer Adler e.V. in Nuremberg.
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Posted by : nita on Monday, July 16, 2007 - 10:34 AM EST |
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Siemens Automation and Drives (A&D) will present new integrated safety functions for the Sinumerik 840D solution line control system at this year's EMO trade show. They meet all the requirements to SIL2 (Safety Integrity Level / IEC 61508) as well as PL d (Performance Level/EN ISO 13849-1), and they have the relevant certification.
There are now sufficient safe cams available for detecting up to 30 traversing ranges. Safe communication via standard Profibus between several Sinumerik 840D sl systems significantly simplifies plant installation. The new DP/AS-I F-Link implements a safe transition from ASIsafe to Profisafe for the first time. The compact network transition (F-Link) collects safety-related signals via the AS-i bus and transfers them via Profibus to the higher-level F controller. This enables simple and low-cost connection between the two bus systems.
With the safe digital electronics module 4F-DI/3F-DO for Profisafe, the ET 200S I/O system now has a module available that is specially tailored to the requirements of machine tools. The electronics module offers four safe inputs and three safe outputs and fulfills the requirements both of SIL2 (IEC 61508) and PL d (EN ISO 13849). It can be used in the Sinumerik 840 D sl as well as in the Sinumerik 840D powerline.
You can find more information at www.siemens.de/sinumerik
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Posted by : fundu_instru on Sunday, May 27, 2007 - 06:54 PM EST |
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The control of fluid power has changed dramatically over the last 20–30 years. The pressures needed in this industry today—5000 or 6000 psi—are double what they were in the late 1990s. These high pressure requirements bring with them a higher risk of employee injury or downtime.
Market Forces
Hydraulic cylinders are used in many industries, but to avoid the damage and disrepair caused by their heavy loads we need to control their deceleration. Past methods have included shock absorbers, which take up a lot of space; proportional valves, which are expensive and wear down with environmental and vibration erosion effects; and a cushion designed into the cylinder, which brings the load to a gentler halt as the cylinder reaches its end of stroke. With advances in electronics and the ability to integrate electronics with hydraulics, use of hydraulic cylinders continues to grow. Manufacturers are embedding sensors in the hydraulic chassis and creating designs to interface directly with standard electronics controllers.
A key issue is the need for increasingly higher operating pressures. The mobile hydraulics segment accounts for about half of the fluid power industry (a $13.5 billion market in 1998). This segment is the most volatile, expanding and shrinking more than any other segment; it is expected to continue expanding as the global demand for capital equipment increases due to the rebuilding of infrastructures in Eastern Europe, Asia, and South America. The Department of Agriculture projected 5.5% growth through 2006 with 20% of this in cylinders.
End-of-stroke is one of the most important signals to be monitored in a hydraulic system. Originally monitored by mechanical means, this signal allowed the hydraulic designer to determine when the cylinder had completed its motion in a given direction. The shortcomings associated with mechanical switches include their short life cycle, the need for constant readjustment, susceptibility to damage from external forces, lack of precision and low repeatability in switch points, and accidental actuations. Their strengths include low initial cost and the fact that they are outside the hydraulic system and therefore unaffected by pressure.
Pressure-Resistant Switches
Pressure-resistant inductive proximity switches are used in a multitude of applications, including hydraulic systems with pressures up to 7250 psi. Pressure resistance requires thick housing walls, particularly at the sensing face. The main problem then becomes how to provide an acceptable operating distance in spite of the thick walls.
Reinforced Housings. These proximity switches attain the required pressure resistance by using sufficiently strong walls. At the sensing face, a ceramic disk—with sufficient thickness to withstand pressure without needing further reinforcement—is used inside the housing. The electronics module, including the ferrite core and the coil, is placed in the pressure-free part of the housing. Because of the thickness of the ceramic disk (2.5 mm for
Figure 1. The housing and the ceramic disk before and after assembly
the Contrinex P20), using a proximity switch module with a normal operating distance (2 mm, in the case of the P20) would result in a usable operating distance of less than zero.
Sealing the Sensing Face. Pressure resistance, by necessity, demands a seal that prevents harmful quantities of liquids and gases from entering the housing, even at maximum operating pressures. Such a seal is particularly crucial between the ceramic sensing face and the metal housing.
In the case of new-generation proximity switches, the housing is heat shrunk onto the ceramic disk. Figure 1 shows the housing and the ceramic disk before and after assembly, and Figure 2 shows the parts in cross section. Assembly is made by inductively heating the housing in the joint area. While the housing is still hot, the ceramic disk is inserted, and the assembly is left to slowly cool down. Due to the metal's higher temperature coefficient, as compared to ceramic, the metal housing shrinks far more than the ceramic disk. With the appropriate choices of diameters d1 and d2, this results in a powerful force fit—up to 200 N/mm2 at the interface.
Figure 2. A cross-sectional view of the housing and ceramic disk
Still, the fit is not yet sufficiently impervious. It requires gas-tight sealing, where a thin layer of copper is inserted between the housing and the
Figure 3. Gas-tight sealing
ceramic disk (Figure 3). The entire housing is copper plated before the shrinking process, and stripped again afterwards; the copper remains at the joint. This, in conjunction with the shrinking process, results in an outstanding seal.
Operating Distance. A large part of the usable operating distance is lost due to the thickness of the ceramic disk. Therefore, to achieve a sufficient operating distance, we use an electronic module with an operating distance approximately 3 times the norm, instead of the standard module. For the P20, the resulting operating distance is 3 mm.
Dynamic Requirements. Conventional pressure-resistant proximity switches are rarely suited for dynamic pressure requirements because their support systems and Teflon seals wear out after a limited number of pressure cycles. In practice, this kind of strain occurs frequently, especially in hydraulic systems. New-generation proximity switches, due to their simple construction and in conjunction with the high pressure used to bond the housing onto the ceramic disk, are completely insensitive to dynamic strain and pressure peaks. Their advantages include:
A virtually unlimited number of pressure cycles permissible over the full range of pressure
Long operating distances
Gas-tight at the sensing face
Easy to mount
No setting required
Applications
The newer pressure-resistant proximity switches can replace devices currently available on the market. While their easy mounting and their longer operating distance are important, they are particularly suited to applications where dynamic pressure strain is to be expected, such as:
Piston end-of-stroke (end position) monitoring in hydraulic cylinders
Control and monitoring of hydraulic valve switching
RPM monitoring and measuring of hydraulic motors
Control and monitoring of valve switching in gas distribution systems (the devices are gas-tight)
Applications in high vacuum
Looking Forward
As the hydraulics industry continues to advance, higher pressures are being used in more applications. When end-of-stroke signals are required, a switch located in the end cap is the most reliable sensing choice. The sensor industry has evolved to produce reliable end-of-stroke sensors that can operate in today's high-pressure environments, with safety margins approaching 40%.
A variety of configurations are available today to meet a broad range of high-pressure applications (Figures 4 and 5).
Figure 4. Some of the main choices of high-pressure quick-connect switches available
Figure 5. High-pressure switches are also offered with integrated cables
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Number of pages: 8 Go to page 1 2 3 4 5 » Last |
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