Scientists refer to the number of vibrations per second as the
frequency of the sound, and its unit is Hertz (Hz). The frequency
of sound waves that our human ear can hear is 20Hz-20000Hz.
Therefore, we call sound waves with a frequency higher than 20,000
Hz as "ultrasonic waves." Ultrasound frequencies commonly used for
medical diagnosis are 1 MHz to 30 MHz.
Theoretical studies show that under the same amplitude conditions,
the vibration energy of an object is proportional to the vibration
frequency. When ultrasonic waves propagate in the medium, the
frequency of the medium particle vibration is very high, and
therefore the energy is very large. In the dry winter in northern
China, if The ultrasonic waves into the water tank, the violent
vibration will make the water in the tank broken into many small
droplets, and then use a small fan to blow the fog into the room,
you can increase the indoor air humidity, which is the principle of
ultrasonic humidifier. Such as pharyngitis, bronchitis and other
diseases, it is difficult to use the blood flow to the drug to
reach the site of the disease, the use of the principle of
humidifier, the liquid atomized, let the patient inhale, can
improve the efficacy. Utilizing the enormous energy of ultrasonic
waves can also cause the stones in the body to be broken by violent
vibration, thereby slowing the pain and achieving the goal of
healing. Ultrasound is widely used in medicine and can sterilize
items.
APPLICATION ANSWER
1.The frequency limit of apiezoceramic sheet and some properties?
Usually the frequency limits of applications are ascertained
through the resonances involved with the transducer design and its
size and shape. For a piezoceramic sheet, there is no limit for
inherent frequency. A sheet of PSI-5A material which is 2.85″
square, .0075″ thick has planar dilatation mode of about 14 KHz and
of 13 MHz of thickness mode vibration in the neighborhood. Limiting
factors can arise such as the resistive heating of electrodes when
considerable current is gathered at large surface area parts during
ultrasonic frequencies.
2.Is there any truth to piezo transducers being used as static and
dynamic force sensors?
Due to charge leakage the Piezo transducers cannot be used for
static force measurements. For transient force measurements they
can be applied successfully for only0.1 second.
3.The expected life of piezoelectric material?
There are no tests yet that can determine the “fatigue life”. Our
facility has had an operational piezo fan since 1982. Such
calculations must involve voltages and mounting.
4.How does temperature effectpiezoceramic transducers?
The pyroelectric properties of piezoceramic are responsible for the
appearance of voltage through the any piezo transducer electrodes
due to temperature changes. Almost each and every property of
piezoceramics is affected by temperature. There exists no general
manner regarding it. In accordance to your experiment and
calculations, the dependence must be looked upon in that context.
Company introduction:
Established in 1999, Beijing Cheng-cheng Weiye Science and
Technology Co., Ltd is a professional manufacturer in ultrasonic
transducers, ultrasonic equipment and piezoelectric ceramics.
Notably in 2004, we researched and developed our ultrasonic tubular
transducer equipment into a new product that turns the extreme
inconvenience brought about by pipeline and vacuum cleaning into an
easy task. This product has been widely used in distillation, mix
and mill for various chemical procedures and has received much
praise from our customers.
Payment:
We accept paypal or T/T, western union etc.
Shipping:
Normally if your quantity is not too much, we ship out by Fedex
express economy. Or as your requested by sea or other express,
according to your quantity.
Certification: ø
CE, ISO9001, ROSH
