Ultrasonic Ultra
Ultrasonic Ultra
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Ultrasonic Humidifier Reasons Why It Is Essential
Ultrasonic humidifier is considered necessary to maintain a certain level of moisture in the air. Moisture level is essential to prevent dry skin and other health problems such as sinusitis and headaches.
There are many varieties of humidifiers available today. However, the most effective and cost efficient among them is the ultrasonic humidifier. Today it is widely used in homes and commercial centers as it has a number of advantageous features.
Why to Choose Ultrasonic Humidifier?
Though there are different varieties of humidifiers available in the markets today, the most popular and widely used among them includes the ultrasonic humidifier. Some of the most important benefits of using this humidifier shall be discussed in the following paragraphs.
Healthy air: This particular humidifier produces mist in the air, thereby creating humidity required for a healthy atmosphere. It also helps to keep a balanced room temperature.
Silent functioning: One of the greatest advantages of this humidifier is its noiseless functioning capability. Compared to the ordinary humidifiers, it is one of the most efficient humidifiers that can be used in bedrooms and office rooms.
Prevents breathing problems: Most of the children and often adults experience acute breathing problems due to lack of moisture in the air in winters. An ultrasonic humidifier helps to solve this problem and restores moisture in the air.
Easy to maintain: People prefer to use these humidifiers as it is quite easy to maintain. It requires less repairs and replacements.
Cost efficient: Compared to the other humidifiers, the ultrasonic humidifier is less expensive as it consumes less energy.
Automatic sensors: Today most of the humidifiers are in-built with automatic sensors which sense the moisture content in the air and operate accordingly. It therefore balances the moisture content in the rooms.
Some of the Latest Technological Features
Water purifier: Until recently, the ultrasonic humidifier is now available with in-built purifiers that purify the water and free it from impurities and minerals. Therefore the possibility of contaminating the atmosphere is negated.
Ultraviolet lights: It is also in-built with ultra-violet lights that prevent insects and different types of bacteria present in the air.
Demineralization cartridges: Modern humidifier includes demineralization cartridges that prevent minerals from being diffused into the air. Earlier, it was necessary to use distilled water or demineralized water in the humidifiers to avoid contamination of the atmospheric air. The use of mineral water also leads to accumulation of bacteria and fungus.
Ultrasonic Humidifier- Different Types
Humidifiers are available in different sizes and types. There are both cool and warm mist humidifiers. The warm mist humidifiers can be used during winters whereas cool mist can be used during summer seasons.
Various sizes: Humidifiers can also be categorized according to their sizes. According to sizes, humidifiers are of two types, mainly- the whole house humidifier and the single room humidifier. The single room humidifier can be used in individual rooms and are portable whereas the whole house humidifier can be used to humidify the entire home.
Apart from domestic uses, these humidifiers are also used in many industrial areas to store products at a required temperature. A huge variety of humidifiers can be bought from online stores at affordable price rates.
About the Author
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Is (ultra)sonic electromagnetic induction possible?
In order for electromagnetic induction to take place, a conductor must "cut" the lines of force of a magnet.
If some sort of surface (in my imagination, a silicon chip, but an sized surface would probably work)... were to have hundreds (or thousands, or millions) of thin, ultra-sensative, conductive "hairs" or "wires" wired to the surface; and if a permanent magnet and ultrasonic sound waves were introduced to the chip (or whatever), would the wire generate an electric current because of the millions (or hundreds, or thousands) of "hairs" vibrating slightly?
I would imagine that if it were possible (I should probably just expiriment with it myself), even thousands of the tiny conductive "hairs" would produce only a small current.
It's an outrageous idea, but I just have to know if anyone knows whether or not it's possible.
Please only hard, scientific answers... External links would be nice... I'll provide extra information if necessary.
Electromagnetic induction of ultrasonic waves is restricted to conducting materials - like eddy current testing - because it involves inducing eddy currents in the surface of the part by a near-by coil of wire. A magnetic field supplied by a near-by magnet interacts with this eddy current to produce a mechanical force on the surface to excite ultrasonic vibrations. The same configuration of coil and magnet also detects mechanical motion of the surface because the motion of a conductor in a magnetic field produces currents that are detected and measured by the near-by coil.
This transduction by induction has the following advantages for NDT: The "near-by" feature implies an air gap next to the part surface and, thus, no coupling liquid or grease layer is present to restrict the range of temperatures or inspection speeds available for testing. The fact that the transduction process takes place within a thin layer at the surface of the part allows the time-of-flight (or phase) of the ultrasonic wave to be measured with great accuracy so that dimensions and physical properties of materials can be used for quality assurance purposes. The shape of the coil and the direction of the magnetic field allow the type (shear or longitudinal) and direction of propagation of the wave to be controlled by the transducer design. Special wave types (e.g., shear horizontal, Lamb, Rayleigh) are readily available to satisfy unusual inspection problems. Coils that are large or contoured to fit odd shapes are inexpensive and extend the range of part geometries available for inspection.
The primary disadvantage of EMATs is their inefficiency. However, this drawback has been overcome with modern electronic design and digital signal processing techniques.
Introduction: The transducers usually used for ultrasonic testing are hand-held probes that must be coupled to the object being tested by a water bath or a thin layer of grease. This latter requirement is often messy and adds considerable mechanical complexity to the test as well as challenging the skill of the operator to get reproducible results. Eliminating this coupling chore and introducing transducers that can operate across an air gap has always been a "holy grail" quest. About 40 years ago, the quest began to be fulfilled with the introduction of high power lasers and air coupling techniques that are being described in the accompanying papers. This paper describes an electromagnetic technique that operates across a small air gap similar to the gap under eddy current sensors. Thus, it is only technically a non-contact sensor. However, it is able to takes full advantage of the absence of a liquid coupling layer. It generates and detects ultrasonic vibrations in a thin surface layer of metallic objects and, therefore, is immune to small surface undulations or layers such as dirt, paint, rust, grease, etc. that prevent piezoelectric transducers from giving reliable resultsin hostile environments. The physical principles are based on the same electromagnetic induction processes that govern electric motors and generators. That is, a wire carrying an alternating current and held close to a conductor will induce eddy-currents in the conductor. If a large magnetic field also floods the area of the eddy-current, forces are generated in the conducting surface by electric motor action and these launch acoustic waves into the conductor at the same frequency as the current that drives the wire. When used as a receiver, acoustic vibrations inside the conductor move the surface under the wire. In the presence of a magnetic field, this motion produces an eddy current in the conductor surface that produces a magnetic field that extends across the air gap to induce a current in the near-by wire connected to a preamplifier.
Ultrasonic live in Hanger 13