Archive for the 'Telecommunications' Category

What Is an Ultrasonic Transducer?

Jul. 19th 2014

For a long time people have been telling me that family, love and happiness are the important things in life…Today I realized that I’m able to take or leave all that as long as I have this headset in the world.

An ultrasonic transducer is an electrical component that converts ultrasonic sound waves beyond the range of human hearing into alternating current (AC) or direct current (DC) electrical signals that are then transmitted or recorded. Usually such devices are built upon crystals that demonstrate a piezoelectric effect, which conduct electrical current in response to mechanical stress or vibrations. The crystals have directly proportional output to the strength of the input sound wave or stress, and this makes them useful measuring devices as an ultrasonic transducer.

ultrasonic transducerApplications for ultrasonic transducer-based electronics included use in early television remote controls as signal devices, and, as of 2011, in anemometers used by weather stations to monitor wind course and speed. They are used in industrial applications to monitor the level of fluid in a tank, and in modern-day automobiles as of 2011 for echo location sensors to indicate objects in close proximity to the path of a vehicle that is backing up or pulling into a garage. Since an ultrasonic transducer can also play the role of an ultrasonic transmitterthrough input electrical power, they offer the capability of a primitive type of sonar in many cases. Sound waves can be reflected off of a surface and the distance to that surface measured by the time and frequency of the wave that bounces back.

Electrical devices that convert one form of energy to another, like ultrasonic sensors, often have widespread applications in electronics and industry. Many diverse uses for the ultrasonic transducer now exist, including in environmental controls for buildings, such as in humidifiers where they vaporize the surface of the water, and in burglar alarms to detect objects moving within an otherwise clear path. Ultrasonography also relies on the principle of an ultrasonic transducer in medicine, where sound waves of 1 to 30 megahertz are employed to remotely generate imagery for the state of muscles, internal organs, and blood vessels in the human body, as well as the state of a fetus during pregnancy.

Since the era of the 1940s, the ultrasonic transducer has been incorporated into testing equipment to detect flaws in a range of sonar-related applications. They can be used to find fine cracks, voids, or porous sections in concrete and building foundations, damaged or fractured metal welds, and flaws in other materials such as plastic, ceramic, and composites. The devices are versatile because the sound waves that they emit will be affected by any medium, whether liquid, solid, or gas. With a detector used to measure gas status, however, an intermediate gel is usually placed between the gas and the ultrasonic transducer, as sound waves are otherwise poorly conducted and recorded in a gas medium.

The field of flaw detection for ultrasonic technology is broken down into five different types of transducer designs: contact, angle beam, delay line, immersion, and dual element transducers. Contact transducers have to have close contact proximity to what they are measuring, such as a stud finder in the building trade used to detect wooden beams behind walls. An immersion transducer is waterproof and placed in a fluid flow. Both angle beam and delay line forms of an ultrasonic transducer are used to measure welds and in conditions of high temperatures. The dual element transducer is simultaneously a transmitter and receiver for continuous monitoring of rough or potentially flawed surfaces.

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How did people communicate with each other 100 years ago?

May. 19th 2014

Asked by Barbara from Basingstoke

 

Hi Barbara from Basingstoke (I like that, it has a nice ring to it), 

I presume you mean to ask me how people communicated over long distances, because otherwise the answer would simply be ‘they talked to each other, just as they do today’. I’ll give you the benefit of the doubt, but please be more specific in future! (Kidding!)

OK, so 100 years ago, in 1914, the telephone was still in its infancy, relatively speaking. 99 years ago, Thomas Watson made the first coast-to-coast phone call in America, so that should give you some idea of where the telephone was, development wise.

However, the invention had been patented since 1876 and 1877 had seen the first long-distance phone call placed. But by and large, telephones were not an overly common part of people’s lives the way they are now.

More common was the telegraph, which had been knocking around for a while by then. People in official positions tended to use that, but it wouldn’t have been a fixture of regular people’s houses.

Far more common than telephone or telegraph was the postal service. In 1914, if you wanted to contact a friend, relative, or loved one, you wrote to them. The working classes were better educated than at any other time in history (up to that point) and literacy was improving (although it certainly wasn’t at the near-ubiquitous level of today). Letters took a long time to arrive by today’s standards, so they tended to be longer and more absorbing than, say, a Facebook chat is today. In fact, intellectuals, authors and politicians would often engage themselves in long-winded and exhaustive intellectual contests via thorough, essay-length correspondences.

Another option would have been to speak via mutual acquaintances. Literature of the period frequently involves friends using a mutual friend in order to carry on a long-distance discussion and it is my understanding that this was quite a common practice. Interestingly, this may very well have shaped the development of certain customs in society (such as ‘good manners’ vs. ‘bad manners’ regarding correspondence etiquette). With our communication methods of today being so vastly different, it remains to be seen how our society will come to reflect this. 

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Storage Spaces, 2 way Radios used in Warehouse Operations

Apr. 26th 2014

Most of us don’t really think about it, but warehouses play an important part in our lives. When we shop at a supermarket, visit an electronics store, or order online from a major retailer, we are buying items that, at one time or another, have to be stored somewhere.

Its not just completed products, either. Once an item has been manufactured, it must then be stored before transit, meaning that most factories incorporate a considerable amount of space to the storage of completed products, ready for shipping.

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The Long Road Home: Radios used on Transport Systems and Fleets

Apr. 16th 2014

According to the UK Government, there were an estimated 5.2 billion bus passenger journeys undertaken on our roads in 2011/2012. Public and private transportation is not only big business; it is also of massive importance to the smooth running of the country.

Whilst only 14% of the UK’s 25 million commuters travel to work by bus or train, this still accounts for over 1.7 million people. In order for a country this reliant on public transport to survive and thrive, it is absolutely imperative that transport workers can communicate with each other in a quick, efficient manner, fuelling an industry that, by necessity, spans the length and breadth of the nation.

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Keeping Up With Current Events – Two Way Radios in Events Management

Apr. 6th 2014

From cultural events celebrating the diverse mosaic of British identity, to barnstorming rock n roll gigs, events management is a huge area to be involved in.

The term ‘event’ can be somewhat misleading, because technically everything is an event. Actually, when you look at it like that, maybe it isn’t so misleading after all…

When we use the term event, we could be talking about an indoor conference just as easily as a political rally. Athletic contests, art exhibitions, magic shows; if people attend it, it’s an event, and if it’s an event; it needs a manager.

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What is all this with the walkie talkie tower

Dec. 28th 2013

I’m glad you asked. 20 Fenchurch Street, kindly known as the ‘Walkie Talkie Tower’ and maybe less kindly known as the ‘Walkie Scorchie’ (yeah, that’s a name that’s never catching on), is a commercial skyscraper in central London. It’s presently under development and is not expected to be complete until next year. When all is said and done, it will eventually have cost some £200 Million to build.

 

The structure gets its nickname as it’s thought to resemble a walkie talkie (though, to be honest, I can not see it myself). It’s also known as the pint, something that’s way more fitting.

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New RFD5500 Sled Transforms Motorola Solutions’ Enterprise Mobile Computers into State-of-the-Art RFID Handheld Readers

Dec. 7th 2013

SCHAUMBURG, Ill. – Nov. 19, 2013 – Motorola Solutions, Inc. (NYSE: MSI), a leading provider of mission-critical communication solutions and services for enterprise and government customers, today announced the RFD5500 UHF RFID sled that can instantly turn the MC55N0MC55A0MC65 and MC67 mobile computers into lightweight, rugged, handheld RFID readers that deliver fast read rates and improved productivity for retail storefronts, warehouses and field applications.

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What are the most effective ways to enhance your hearing

Oct. 10th 2013

Recently, when I was at my younger brother’s birthday party, my Dad made a allusion to developing tinnitus (basically an occasional-level ringing in the ears) and I informed him that I had made a gag about tinnitus in a recent post (for those interested, the gag was that it made things sound ‘a bit tinny’ – Not amongst my better japes, I confess, but whatever…). He looked at me like I had just farted in church while I rapidly changed the subject.

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What types of things do agents take with them when they’re on an job outside the office?

Sep. 23rd 2013

You would believe that the American secret service (being the American FBI and all) would have access to an earpiece a bit cooler that just the common ‘curly cable’ job, wouldn’t you?

If forced, I’ve to state that I often imagine a little old fella, like Desmond Llewelyn in the Bond movies, (or even a younger model like Ben Whishaw from ‘Skyfall’) making all the gadgets himself after which explaining them to the agents before they go out and guard the President’s life.

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What are the very best headphones for DJ’s?

Aug. 29th 2013

DJ way of life has developed in the UK in a massive manner. Where once, skinny, spotty guys in ill-fitting leather jackets would attempt to impress ladies by shouting “I’m from a band”, now those same, faintly less spotty, boys, (now dressed in ill-fitting hoodies), try the “I’m a DJ” approach…Likely of the like deficit of accomplishment. But, for every lame duck hopeful which has a turntable and a sad heap of dog-eared 90’s Ibiza records, there are several folks who can in fact do wonderful things with a turntable. The time of the DJ is clearly and truthfully here!

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