Browsing Tag

Process engineering


Environmental Monitoring system in Bangladesh

December 20, 2018

In monitoring the environment system, many sensors and early warning systems are deployed in remote areas all around the world. satellite cameras satellite data transceivers provide the reliable satellite data M2M communications monitoring (machine to machine) needed to collect monitoring information from your remote sites.
Changes in the environment can be caused by either natural catastrophes like floods, typhoons, and volcanic eruptions or the human factor like industrial pollution and urban development. Whatever the cause, such changes may result not only in the loss of life and property in the short term but also environmental degradation in the long term.
To conserve the environment, it is essential that environmental changes such as variations in the conditions, patterns, and dynamics of air, water, and land resources, are effectively monitored. Recent advancement in Geographic Information Systems (GIS) technology has enabled environmental scientists to incorporate spatial data collected via diverse sources for monitoring purposes. In the GIS can be found digitized maps, demographic figures, and multitemporal information about the temperature, humidity, size, boundary, etc. of specific locations. Closely linked with GIS is remote sensing technology under which special data are acquired in the form of images depicting the spatial variation of terrestrial objects in terms of spectral reluctance. Remotely-sensed images range from the conventional aerial photographs taken from airplanes to the more sophisticated multispectral and multi-resolution digital data acquired by satellite sensors.
At present, both GIS data and remotely-sensed images can be stored, managed, processed, and retrieved in an integrated geographic information system (IRIS). But if scientists want to obtain high-level analysis and sophisticated interpretation of these two sets of data together, the IRIS has first to be upgraded and made more `intelligent’.
Conventional remote sensing image processing systems are developed on the basis of statistical pattern recognition and image analysis methodologies. Techniques have been developed to enable the systems to detect changes and classify images, but such techniques are very basic and their results are crude when compared with those of a skilled photo interpreter.

                                             Monitoring system in Bangladesh
A good photo interpreter can efficiently utilize the image characteristics of tone, cooler, shape, size, texture, pattern, shadow, and site, and synthesize them with his/her knowledge of a specific region or discipline to produce detailed and accurate interpretations of environmental changes.
Researchers at CUHK have set out to formalize and automate the manner in which a photo interpreter performs his or her work, and to produce an intelligent image processing system that could provide high-level analyses and interpretation of remotely-sensed data. Environmental monitoring aims to assess the quality of natural resources and determine the effects of human activity on the environment. Common factors to measure our air, water, and soil quality. Air quality is most often measured by assessing relative amounts of chemicals such as CO2 and methane while water and soil can be monitored for harmful chemicals, biodiversity, or presence of harmful microorganisms.
Key to proper environmental monitoring is a well-planned experimental setup that takes into account what particular factors need to be measured, the sample size necessary to obtain meaningful results, what types of results might be expected, an assertion that the experimental actions themselves will not cause more harm than good. All these factors must be considered when purchasing equipment for environmental monitoring purposes.

Remote unattended air pollution systems. Weather stations (rainfall, wind, temperature, atmospheric pressure, humidity).Wildfire prescribed burning. Avalanche warning systems (snowpack monitoring systems).Coastal surge and tsunami early warning systems.Ice flows, icebergs, and glaciers.Lightning detection stations.Earthquake monitoring stations.


Invert-er panel setup in industrial area

December 20, 2018

Inverter Panel is an electronic device or circuitry that changes direct current (DC) to alternating current
The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry. The inverter does not produce any power; the power is provided by the DC source.
A power inverter can be entirely electronic or may be a combination of mechanical effects (such as a rotary apparatus) and electronic circuitry. Static inverters do not use moving parts in the conversion process.
Circuitry that performs the opposite function, converting AC to DC, is called a rectifier. An inverter can produce a square wave, modified sine wave, pulsed sine wave, pulse width modulated wave (PWM) or sine wave depending on circuit design. The two dominant commercialized waveform types of inverters as a modified sine wave and square wave.
There are two basic designs for producing a household plug-in voltage from a lower-voltage DC source, the first of which uses a switching boost converter to produce a higher-voltage DC and then converts to AC. The second method converts DC to AC at battery level and uses a line-frequency transformer to create the output voltage. This is one of the simplest waveforms an inverter design can produce and is best suited to low-sensitivity applications such as lighting and heating. Square wave output can produce “humming” when connected to audio equipment and is generally unsuitable for sensitive electronics. A power inverter device which produces a multiple step sinusoidal AC waveform is referred to as a sine wave inverter. To more clearly distinguish the inverters with outputs of much less distortion than the modified sine wave (three steps) inverter designs, the manufacturers often use the phrase pure sine wave inverter. Almost all consumer grade inverters that are sold as a “pure sine wave inverter” do not produce a smooth sine wave output at all, just a less choppy output than the square wave (two-step) and modified sine wave (three steps) inverters. However, this is not critical for most electronics as they deal with the output quite well. The inverter may be built as standalone equipment for applications such as solar power, or to work a power supply from batteries which are charged separately.

Electrical-Works                                                                                             Inverter setup
The other configuration is when it is a part of a bigger circuit such as a power supply unit, or a UPS. In this case, the inverter input DC is from the rectified mains AC in the PSU, while from either the rectified AC in the in the UPS when there is power, and from the batteries whenever there is a power failure. There are different types of inverters based on the shape of the switching waveform. These have varying circuit configurations, efficiencies, advantages and disadvantages
An inverter provides an ac voltage from dc power sources and is useful in power electronics and electrical equipment rated at the ac mains voltage. In addition, they are widely used in the switched mode power supplies inverting stages. The circuits are classified according to the switching technology and switch type, the waveform, the frequency and output waveform. The basic circuits include an oscillator, control circuit, drive circuit for the power devices, switching devices, and a transformer.
The conversion of dc to alternating voltage is achieved by converting energy stored in the dc source such as the battery, or from a rectifier output, into an alternating voltage. This is done using switching devices which are continuously turned on and off, and then stepping up using the transformer. Although there are some configurations which do not use a transformer, these are not widely used.
The DC input voltage is switched on and off by the power devices such as MOSFETs or power transistors and the pulses fed to the primary side of the transformer. The varying voltage in the primary induces an alternating voltage at secondary winding. The transformer also works as an amplifier where it increases the output voltage at a ratio determined by the turn’s ratio. In most cases, the output voltage is raised from the standard 12 volts supplied by the batteries to either 120 Volts or 240 volts AC. The three commonly used Inverter output stages are, a push-pull with centre tap transformer, push-pull half-bridge, or push-pull full bridge. The push-pull with centre tap is most popular due to its simplicity and, guaranteed results; however, it uses a heavier transformer and has a lower efficiency.
A simple push-pull DC to AC inverter with centre tap transformer circuit is a shown in the figure below. The inverters are classified according to their output waveforms with the three common types being the square wave, the pure sine wave and the modified sine wave.
The square wave is simple and cheaper, however, it has a low power quality compared to the other two. The modified square wave provides a better power quality (THD~ 45%) and is suitable for most electronic equipment. These have rectangular pulses that have dead spots between the positive half cycle and the negative half cycle


latest Industrial Automation Service Providers

December 20, 2018

The demand for the latest Industrial Automation technology is growing as companies across industries look for ways to streamline and speed production and manufacturing. This creates a significant opportunity for the makers and service providers of manufacturing control and execution systems, electric motors and drives, sensors, regulators, and robotics. We help these companies capture market opportunities and address the challenges associated with increasingly complex automation systems, fragmented value chains, diverse customer requirements, and the growing emphasis on software. From large conglomerates and multinationals to small product specialists and integrators, our Advanced Electronics Practice serves a range of companies. Our consultants have deep expertise in the manufacturing methods and requirements of discrete industries, such as automotive and assembly, as well as process industries, such as pulp and paper and bulk chemicals. We have a unique understanding of our clients’ customers, the industries in which they work, and the trends that shape those industries. In the age of digital disruption, companies need to rethink their business, products, and services. We help clients bring the digital transformation to life through Accenture’s Innovation Architecture, a unique suite of labs, studios, and innovation and delivery centers that enable clients to rapidly prototype and test new offerings and scale them at speed. Accenture Labs engineered a connected car, embedding sensors that could gather driver data and provide services to encourage safer driver behaviors. Using an innovative process that involved crowdsourcing and augmented reality, we collapsed the typical design and development timeline from more than a year to six weeks, potentially creating significant cost savings.
Our experts also bring the latest thinking on automation technology to each client project. We advise clients on growth strategy, organization and capability building, research and development and product architecture, design-to-value, supply chain, purchasing, and go-to-market strategies. Last, because the software is increasingly

anytime-automation                                                                                            Quick automation
important to our clients’ hardware, we serve clients on the topics of software amelioration and software capability building. We helped a multinational client develop a smart IT strategy that combined the best of the client’s IT capabilities and infrastructure. By drawing on the perspectives of McKinsey experts from a variety of industries, the team assisted the client in exploring multiple options. personalization doesn’t end with production–it charges ahead in the aftermarket. We take the customer insights gained through AI-enabled software and connectivity to help clients shift to as-a-service models with solutions focused on maintenance, repair, spare parts, warranty and product performance. The client has since launched a new business unit focused on providing smart IT solutions in a specific industry. Building upon individual customer requirements addressed in the design phase, manufacturing shifts from a “one-size-fits-all” to a demand-driven, hyper-personalized approach powered by industrial automation. We support the development of smart products and services using new technologies that drive down operating costs while increasing product quality and operations transparency. More with less are challenges facing all industries. Yet each industry is unique, and there are no simple answers. To reach your goals, you need a partner who speaks the language of your industry.

Telesys Bangladesh has developed a comprehensive portfolio of industry expertise, with a network of global industry centers and thousands of industry and application experts, many of whom have faced the same challenges you do today. The automotive industry is one the prime movers of the economy. As a manufacturer, you strive to produce quality components and vehicles in a fast-paced environment impacted by changing trends. telesys engineer helps improve your efficiency and flexibility to stay on time and on budget.