Transduser Piezoelektrik: Tasiri da Tsohon Yadda Ake Samu
Me kadan Maimakon Piezoelectric Transducer
Maimakon piezoelectric transducer (ko da yake maimakon piezoelectric sensor) shine tushen da take amfani da zafiya ta piezoelectric don bincike wahala masu gajarta, kyau, hakkin zafiya, na farin tsaye ko lafiya tare da kan kawo wannan zafiya zuwa mu'ammarin juna.
Maimakon transducer yana iya zama cewa abu da ke kawo zafiyan daga wani abu zuwa wani. Maimakon piezoelectric material shine wani na cikin maimakon transducers. Idan muke so in yi nasara da wannan maimakon piezoelectric ko kawo kyau ko kyautar, maimakon ya kawo wannan zafiya zuwa mu'ammarin juna. Wannan mu'ammarin juna shine alamar kyau ko kyautar da aka yi hankali aiki.
Mu'ammarin juna da maimakon piezoelectric transducer ya kawo za a iya kawo shi da alamun mu'ammarin juna measuring instruments. Saboda haka, za a iya fahimtar kyau ko kyautar da aka yi hankali aiki daga bayanan mu'ammarin juna. Don haka, za a iya bincike abubuwan da suka haɗa da hakkin zafiya ko lafiya tare da kan maimakon piezoelectric transducer.
Piezoelectric Actuator
Maimakon piezoelectric actuator ya yi aiki a cikin hanyar da ba ce a maimakon piezoelectric sensor. Yana iya zama cewa a nan mu'ammarin juna zai yi nasara da maimakon da ke kawo hankalin zuwa karamin ruwa ko karamin ruwa.
Yana nufin cewa a maimakon piezoelectric sensor, idan kyau ko kyautar ya kasance don karamin ruwa ko karamin ruwa, electric potential ya faru, kuma a nan piezoelectric actuator, idan an faru electric potential, maimakon ya karamin ruwa ko karamin ruwa.
Maimakon piezoelectric transducer yana da maimakon quartz crystal da ake gina ne da silicon da oxygen da suka sauti a cikin crystalline structure (SiO2). Amma, unit cell (basic repeating unit) da duka crystal suna da symmetrical amma a maimakon piezoelectric quartz crystal, ba ce. Maimakon piezoelectric crystals ba su da electrically neutral.
Atomin da suke cikin su ba su da symmetrical arrangement amma suke da electrical charges da suke balanced means positive charges cancel out negative charge. Maimakon quartz crystal yana da property mai zurfi da take faru electrical polarity idan an yi mechanical stress aiki a cikin wani plane. Ba gaskiya, akwai wata biyu na stress. Wanda shi shine compressive stress kuma wanda shi shine tensile stress.
Idan an yi stress a maimakon quartz, ba suka faru charges. A cikin compressive stress, positive charges sun faru a wata sabon kuma negative charges sun faru a wata maza. Maimakon quartz ya kawo thin and longer saboda compressive stress. A cikin tensile stress, charges sun faru a cikin hanyar da ba ce a compressive stress kuma maimakon quartz ya kawo shorter and fatter.
Maimakon piezoelectric transducer yana yi aiki a cikin principle da take faru piezoelectric effect. Kalmar piezoelectric ita ce ne da Greek word piezen, wanda yana nufin to squeeze or press. Piezoelectric effect yana nufin cewa idan an yi mechanical stress or forces a maimakon quartz crystal, za a faru electrical charges a surface of the quartz crystal. Piezoelectric effect ita ce ne da Pierre and Jacques Curie suka samu. Rate of charge produced will be proportional to the rate of change of mechanical stress applied to it. Higher will be stress higher will be voltage.
Wanda shi shine unique characteristics of the piezoelectric effect shine cewa yana iya zama reversible means when voltage is applied to them, they tend to change dimension along with certain plane i.e quartz crystal structure is placed into an electric field, it will deform quartz crystal by an amount proportional to the strength of the electric field. If the same structure is placed into an electric field with the direction of field reversed, the deformation will be the opposite.
Quartz crystal becomes longer due to the electric field applied
Quartz crystal becomes shorter due to the electric field applied in a reversed direction.
It is a self-generating transducer. It does not require an electric voltage source for operation. The electric voltage produced by the piezoelectric transducer is linearly varied to applied stress or force.
The piezoelectric transducer has high sensitivity. So, it acts as a sensor and used in accelerometer due to its excellent frequency of response. The piezoelectric effect is used in many applications that involve the production and detection of sound, electronic frequency generation. It acts as an ignition source for cigarette lighter and used in sonar, microphone, force, pressure, and displacement measurement
Amfani da Maimakon Piezoelectric Materials
Amfani da maimakon piezoelectric materials, maimakon piezoelectric transducers zai iya amfani a wani abubuwan amfani, ciki:
A cikin microphones, sound pressure yana kawo zuwa electric signal kuma wannan signal yana kawo zuwa louder sound.
Automobile seat belts lock in response to a rapid deceleration is also done using a piezoelectric material.
It is also used in medical diagnostics.
It is used in electric lighter used in kitchens. The pressure made on piezoelectric sensor creates an electric signal which ultimately causes the flash to fire up.
They are used for studying high-speed shock waves and blast waves.
Used infertility treatment.
Used in Inkjet printers
It is also used in restaurants or airports where when a person steps near the door and the door opens automatically. In this, the concept used is when a person is near the door pressure is exerted person weight on the sensors due to which the electric effect is produced and the door opens automatically.
Misalai na Maimakon Piezoelectric Material
Abubuwan da suke:
Barium Titanate.
Lead zirconate titanate (PZT).
Rochelle salt.
The Piezoelectric Ultrasonic Transducer
It produces frequencies that are far above that which can be heard by the human ear. It expands and contracts rapidly when subjected to any voltage. It is typically used in a vacuum cleaner.
Piezo Buzzer
Buzzer shine cewa abu da ke faru sadarwa. Suke yi aiki a cikin oscillating electronic circuit. Maimakon piezoelectric element may be driven by an oscillating electronic circuit or another audio signal source, driven with a piezoelectric audio amplifier. A blick, a ring, or a beep are commonly sued sound to indicate that a button has been pressed.
Maimakon piezoelectric buzzer (or piezoelectric beeper) depends on acoustic cavity resonance (or Helmholtz resonance) to produce an audible beep.
Piezoelectric Transducer Advantages
The advantages of piezoelectric transducers are:
