Transducers - The Remarkable Changers
Complex control systems all make use of signals that can be easily measured and altered remotely. Automatically operated machines or actuators need to be powered either by electrical motors, pneumatic or hydraulic cylinders. The most common signals sent out from a transducer are electrical current or voltage and pneumatic pressure. These signals are easily translated by controllers. Visual measuring devices like liquid bulb thermometers are not able to be used in automatic control systems because there are no electrical or pneumatic signals. However, when some other component is added to it to enable it to give a corresponding signal, then the measuring unit becomes a transducer. A transducer is a device to convert a signal (representing a physical quantity) of one form into a corresponding signal of another form, retaining the amplitude variations of energy being converted. Just as an example, a microphone is a sound transducer (acoustic to electrical) and a loudspeaker is an electrical transducer (electrical to acoustic). A transducer may be an integral part of the measuring unit, for example pressure to displacement in a Bourdon pressure gauge. It may also be a separate unit converter especially suitable to change the signal to a better form for remote transmission, e.g. displacement to electrical in a differential transformer. How do these transducers work? To convert physical movement to electrical signals, some devices make use of variable resistors. Any movement will cause a slider contact to change position against a resistance wire causing a change in electrical current or voltage. Other devices may make use of the movement to alter the position of an induction coil relative to the magnetic core, causing a change in the induced current in the circuit. Others may make use of the movement to change the air gap between two capacitance plates, causing a change in the current in the circuit. In the case of the loudspeaker, the opposite effect takes place. Electrical signals are converted to movement. Some pneumatic transducers make use of changing air signals to cause a corresponding mechanical movement in the flapper and linkages. This movement is then converted to electrical signals by the methods above. So it takes 3 steps of conversion before we can get the electrical signal. Once the electrical signal is obtained, it can be used to compare to the set value in the controller, and a whole control system can be designed from it. Well folks, get your signals and be in control! "What You Should Know About Travelling Make Ease"The Smart Traveller prepares for Journeys into Unknown Territory. Foreign Travel requires More. Many years of working experience in Marine, Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezine More information at Marine Engineer and M & E Engineer
MORE RESOURCES:
Women with Bay Area roots take yoga to BeijingSan Francisco Chronicle, USA - 16 hours agoThis is the refuge San Francisco native Robyn Wexler and Stanford graduate Mimi Kuo-Deemer envisioned when they opened Yoga Yard, believed to be China's ... |
City Sports: Yoga at Mission YMCASan Francisco Chronicle, USA - Aug 20, 2008Swing by the Mission YMCA every Friday for a free yoga class offered by Iyengar Yoga Institute of San Francisco. Yoga mats provided, but you can bring your ... |
amNewYork |
After hours yoga classesamNewYork, New York - 3 hours agoBy K. Emily Bond | Special to amNewYork The Laughing Lotus, located on 19th st in Manhattan, hosts "Midnight Yoga" sessions Friday nights. ... |
Boycotting BikramChicago Tribune, United States - 55 minutes agoThis is in response to the Bikram Yoga founder (Bikram Choudhury) interview by Julie Deardorff ("Yoga's top dog oversees a hot commodity," Tempo, Aug. 20). ... |
Local yoga experts put Wii Fit to the testThe Desert Sun, CA - 15 hours agoThe exercise game consists of four parts — aerobics, strength, balance and yoga. Nearly all of the exercises are performed on a balance board that tracks ... |
Yoga master to visit hospital for seminarAsbury Park Press, NJ - 15 hours agoTOMS RIVER: Yoga Master Sri Swami Adhyatmanandaji of India will visit Community Medical Center, 99 Route 37 W., on Sept. 6 and 7 to present yoga sessions. ... |
Aerial yoga takes flightSan Jose Mercury News, USA - Aug 19, 2008By Chris Bynum Newhouse News Service NEW ORLEANS — I am a yoga dilettante, content to sample a buffet of yoga entrees, which is how I ended up agreeing to ... |
Yoga is your Guided RelaxationCorsavoo.com, France - 22 hours agoYoga is not an exercise it is a way to teach you how to relax and become a healthier you. Yoga will help teach you to relax and relieve some of that stress ... |
Yoga - Google News
|
 |
|
|
RELATED ARTICLES
Submarine Propulsion and Internet web sources
Let us discuss the patent for the Submarine, which is now in the public domain, not that any foreign governments ever cared since they have been building them for years. Since my Grandfather built the first Ring Gyro at Stanford Research years back, I think it wise to discuss these things in a modern context.
Should We Allow The Genetic Modification of Insects?
Some scientists argue over creation, intelligent design and evolution. Others argue did man create god or did god create man.
Super Volcano: Can The Disaster Be Prevented?
It maybe possible to apply a rogue wave theory and some mathematical formulas of fluid dynamics to the problem of superplumes (theory) of volcanic activity to get them to erupt outside areas of high populations. This would be done by triggering events into the liquid magma underneath the surface.
Para Trooper Gliders With Angle of Attack Motor or Crank
Para Trooper Gliders were very popular in WW II, they were used by both the Axis and Allied Forces. Some of these gliders were huge in size and the Germans had one which had took three bombers to get it off the ground along with two-four rockets used in take off.
Atlantis through Science
ICE AGES: - The impact of the ice ages and inter-glacial effects on the rise and fall of ocean levels and the earth readjustments to the departure of the ice cap cannot be over-looked in the human historical picture. Research in the area is far greater than in the recent past and we can learn what might have happened to earlier civilizations on earth.
Rodent Populations are Half within 3 miles of a Railroad Track
About a month ago, I was helping a friend collect meteorites. We picked out a grid pattern and started walking six to 9 feet apart with metal detectors looking for the iron-nickel meteorites which are quite common here on the Earth's surface The grid is large and takes many days to even make a dent in it and each time we are able to collect some meteorites.
Human Motion, Walking, Running and Gait for Identification
Identifying a human gait, walking patterns, running exists. Can such records be of value? Many think so.
A Tuned Bio-Field and a New Definition of Consciousness: Part 2
Love, pure Love, is the feeling one has when they are appreciating the deep beauty of something in their life i.e.
Acoustic Transducers and Material Memory in Pipelines to Create Flow Up Hill
For the better part of human history mechanical pumps and suction techniques have been used to bring water uphill. By using dynamic pressure, downhill kinetic energy, pumps, suction and heating up the fluid mankind has been busy getting those fluids to market or desired areas.
How I Became Interested In Looking At The Moon
Like a lot of kids, my folks gave me a 60mm telescope for Christmas one year. The scope was a typical department-store brand - not very good - but to a 12-year old kid it opened up the universe.
How Did DNA Testing Children Begin?
The landmark immigration case Sarbah vs. Home Office (1985) was the first to use DNA testing to prove a mother-son relationship between Christiana Sarbah and her son Andrew.
Enemy UAV Defense is under consideration
Unmanned Aerial Vehicles should be shot down from the air rather than the ground because if they are flown tele-robotically the operator who is looking down and forward will not know where the anti-aircraft device is. If the enemy uses Unmanned Aerial Vehicles to draw fire, which is a smart move for them, then once fired upon the Unmanned Aerial Vehicle whether it is shot down or not has now located our weaponry and troops.
Movin On: Taking Transhumanism in Stride
Back in the seventies, we watched "The Six Million Dollar Man", a popular television show about a trained agent who was critically injured and given the gift of technology--bionic legs and super vision.Lee Majors portrayed a man capable of leaping tall buildings and scanning the landscape at night.
The Future Enhancements of Tele-Robotics
Today we have already available UAVs, which will soon have the capacity of operating together in swarms, controlled from another nearby aircraft. We have UAVs, which can be flown by a pilot sitting at a desk more than 1000 miles away.
Static Charge Pulse on Wind Generator Material Memory Blades
Wind Power is considered a clean industry and is amongst the favorites of environmentalists and clean energy supporters. Unfortunately the wind generators rely on the wind and the wind is somewhat inconsistent in that sometimes it blows and some times it does not.
What is Dowsing?
Dowsing is definitely an intuitive art and one of the oldest forms of divination in the world. Perhaps the oldest and most familiar image we have a dowser is what is called a field or map dowser.
UAV Acoustic Apparatus for Insect Swarming Stimulus, part one
Can we coax warms of Locusts to attack our enemies? It appears we can do this by way of directional sound stimulus. Disrupting the enemy by guiding mass Locust Swarms towards communication posts, radar facilities, SAM Sites, Command and Control Stations, logistical sites, Major Infrastructures using Unmanned Aerial Vehicles equipped with sound devices which are typically used in agriculture in replacement of pesticides.
Why Dont Moths Fly to the Moon?
Surely, in the days before man invented artificial light, moths would have been attracted to the only light source at night - the moon. Wouldn't they have just kept on flying until they dropped from exhaustion? In fact does this not happen today in sparsely populated areas, where the moon is still the only night-light available?NavigationSorry to disappoint you, but there is no concrete answer - only theories.
UAV Mini - Torpedo Bombers for Eliminating Hydro Cushioned Water Craft
UAVs can carry cargo, some of the very tiny UAV units can hold up to 11 lbs. Which is not much, however.
Living In Arizona Boulders--Where Did They Come From?
When most people think of building a secluded home, they think of tall trees and large bushes. But what about boulders?Granite Park, located in Prescott, Arizona, which is in the north central part of the state, is one such place filled with 1.
|
