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| Type of Industrial Touchscreen Monitor |
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Dr. Samuel C. Hurst invented touch screen monitors in 1971 and since then they have become increasingly popular, particularly in commercial computing such as ATMs and ticket machines and also in mobile phone and PDA technologies.
Touch screen monitors combine both an input and output device, minimizing the need for separate peripherals like keyboard, mouse and monitor. Instead a user merely has to touch the monitor with either a finger or sometimes a stylus at manipulate the graphical user interface.
Touch screen monitors use one of a number of technological systems to recognize a person's touch the most common being resistive, capacitive, infrared and acoustic wave.
Resistive touch screens are the most versatile, they consist of a normal glass plate that is covered with both a conductive and a resistive metallic layers. The two layers are spaced apart and an electrical current runs through them while the monitor is running. When a user touches the screen, the layers make contact in that exact spot causing interference in the electrical field, the computer then calculates the coordinates.
The only downsides to this system are that the multiple layers restrict about a quarter of the light transmitted by the monitor and they can also be easily scratched which reduces their efficiency.
The capacitive system differs by having a layer that stores an electrical charge placed on the glass panel of the monitor. When someone touches the panel, some of the charge is transferred to the user, so the overall charge on the layer decreases, this can be measured by circuits and calculated by the computer as to where the touch took place. The capacitive system also allows a lot more light to be transmitted from the monitor than the resistive system.
Capacitive touch screens are a lot more durable and resistant to contaminant than the resistive system. They are a more popular for industrial and outdoor applications because of their durability and their imperviousness to moisture, dirt and grease.
Surface acoustic wave technology uses ultrasonic waves that pass over the touch screen panel. When the panel is touched, a portion of the wave is absorbed, like the current in a capacitive system and this can be measured identifying the location of the touch.
Surface wave panels can be easily damaged and contaminants on the surface will hinder its functionality but it offers higher clarity and optical accuracy than the other systems.
Infrared touch screens employ two different methods. One measures warmth of a person's touch to the surface layer. This method requires warm hands and users cannot wear gloves or use a stylus. Another method is to use a light beam near the surface of the screen the infrared is used to measure when that light beam is broken by touching the monitor. IR touch screens are the most durable but can be slow to respond.
Other systems include strain gauge, where the screen is spring mounted on the four corners and the movement is measured when the screen is touched. This technology is heavily durable and resistant to vandalism.
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| 10月29日（月）13:01 | トラックバック(0) | コメント(0) | Economy | 管理
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| Switching Power Supply Efficiency |
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If you need to use a power supply in your home, you will need to know more about switching power supply efficiency. The switching is not hard, but it does depend on the model of the unit you have. You will also not just go out to buy any type of power supply, there are a few things that you will want to take into consideration. This is why you need to do your research on switching power supply efficiency.
You will find that there are quite a few different brands of power supplies out there. You will also find that there are a few different types of units that do different things. Most people do not know this, but a generator can also be known as a power supply, because it is a device that supplies power to other devices that needs it.
A power supply is not just a device that provides power at a lower output than your normal home output. Yes, we all know that, traditionally, this unit is plugged into a normal wall socket, take in the power and outputs that power at a lower amperage or voltage. However, if you were to look at it you would find that it is still providing power, which means that anything that provides power can be called a power supply, especially if that device is providing that power when you do not have any other source of power, and when you need to be switching power supply efficiency.
If you are looking for this unit you need to know that it is best if you started your search online. The internet holds a ton of sites that offers information that will lead you in the right direction. you need to know what you need to get out of your unit.
This means that, if you are trying to power up your home, you will need to know the exact amount of power you will need your unit to output. This means that you will need to find out the usage for each of the devices you need to power up. If you are going to power up your TV, refrigerator, deep freezer, computer, stove, if you have an electric stove, and a few of the lights in your home, you need to know that you will need an output of X from your supply unit or generator in order to keep your home running for a certain amount of time.
You will also need to know that a computer will need one of these units of it own. This is because you will need a constant flow of power to a device this sensitive. There are a number of computer UPS's out there.
Switching power supply efficiency will let you change the output of the power you get out of your device, so make sure that you get one that offers this tool, because it will always come in handy if you are powering up different things all the time.
Article Source: http://EzineArticles.com/5842249
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| 10月22日（月）18:19 | トラックバック(0) | コメント(0) | Economy | 管理
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| Fall refrigerator maintenance Raiders |
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 Fall, home refrigerator needs cleaning cleanup If you ignore these issues, daily life, we put the food in the refrigerator, will inevitably breed a large number of bacteria, for a long time can also cause some damage to the refrigerator. Here to tell us to talk about the fall of refrigerator maintenance precautions.
(1) should regularly clean the refrigerator (at least 2 times a year). First cut off the power when cleaning the refrigerator with a soft cloth dipped in water or eating utensils, detergent, scrub gently, then moistened with water and detergent to wipe away.
(2) Do not use detergent, scouring powder, talcum powder, alkaline detergent, the day that water, water, oils, brushes and other cleaning the refrigerator to prevent coating damage outside the box and inside the plastic parts.
(3) inside attachments dirty fouling should be removed with water or detergent. Electrical parts of the surface with a dry cloth.
(4) After cleaning, the power plug is firmly inserted, check the thermal controller
is set in the correct position.
(5) refrigerator when not in use for a long time, you should unplug the power cord, wipe clean the box until the box fully dry after the door closed.
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| 10月17日（水）15:09 | トラックバック(0) | コメント(0) | Cooking | 管理
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| Apple Fans' Favorite - Lovely Hand Mad |
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The various iPhone case that is a huge market industry of mobile phone accessories. Mobile phone accessories manufacturers are racking their brains to design various iPhone accessories, in addition to some functional accessories, some unique appearance accessories like us today introduced the design by the Korean Leese Design iPhone embroidered shell and 3.5mm the headphone jack embroidery plug is a great range of products. The top of this embroidery shell itself has a lot of holes, we can take advantage of these holes embroidered above a variety of patterns. The shell itself has a variety of colors, with thin lines of various colors and fine needle highlight the distinctive personality, you can make your iPhone.
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| 10月9日（火）16:25 | トラックバック(0) | コメント(0) | Hobby | 管理
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| Choosing the right DC Power Supply |
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The DC Power Supply is a rather fundamental electronic device, however there are hundreds of DC Power Supply products on the market from dozen of manufacturers. Narrowing down the best product for your application and budget can be a daunting task. This article addresses DC power supply differentiators, functions and the applications they are best suited for. The article's focus is DC Power Supplies used by engineers, manufacturers, quality professionals and electronic hobbyists for the purposes of R&D, manufacturing and testing.
Power Supplies can range in price from $50 to $20,000 and the cost is often directly proportional to the amount of power the device outputs. The primary function of a power supply is to regulate output voltage and current. It takes an input power and regulates the output power as to enforce a constant voltage and current. In the case of DC Power Supplies, the input power is converted from alternating current (AC) to direct current (DC). There are two basic types of regulated DC Power Supplies: Linear and Switching.
Linear power supplies can never output a higher voltage than the input source. In theory, a linear power supply that is driven by typical 110V wall outlet could only output 110V, assuming the device were 100% efficient. Realistically, no power supply is 100% efficient because power conversion always results in energy loss, usually in the form of heat dissipation. Therefore, linear power supplies usually output voltage that is significantly less than the input.
Switching power supplies can step-up, step-down or invert the input voltage. Switching power supplies are usually larger, noisier and more expensive than their linear counterparts, however, switching power supplies are typically more efficient.
Choosing the right DC power supply for your application requires definition of some basic design specifications: voltage range, current range, number of outputs, power cleanliness (known as "ripple") and programmability. In general, the higher the output voltage and the lower the ripple, the more expensive the DC Power Supply. Multiple outputs and programmability features will also add to the cost.
The least expensive DC Power Supplies are ideal for electronics hobbyists and basic electro-mechanical applications where only raw power is required. It is likely that the devices being powered in these applications already have power-conditioning features that eliminate the need for precision input power. Low power, single output, DC power supplies range in price from $50 to $200.
Mid-range power supplies are best suited for non-critical, laboratory projects involving more advanced electro-mechanical applications or basic board-level testing. Mid-range power supplies might have multiple outputs, higher power ratings, lower ripple and precision, digital metering (+/- .001V, +/- .01A). Mid-range DC power supplies can be linear or switching and could range in price from $200 to $1,000.
High-end applications requiring high output voltage, advanced programmability (GPIB PC Interfaces), numerous outputs and very low ripple should budget in excess of $1,000 for their
DC power supply. Many laboratory, R&D and testing applications could easily spend $5,000 to $10,000 per power supply.
This article has introduced some basic features and applications of DC Power Supplies. Before making your final purchase, be sure to consult the manufacturer and thoroughly understand all the specifications of a particular product. Choosing the best and most economical DC Power Supply for your application does not have to be a complex and time-consuming task. By identifying your design parameters, you will quickly narrow down product selection to a niche class of products from only a few power supply manufacturers.
Article Source: http://EzineArticles.com/176353
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| 10月9日（火）12:53 | トラックバック(0) | コメント(0) | Job | 管理
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