Ultrasonic interferometer
Working principle An ultrasonic interferometer is a simple and direct device to determine the ultrasonic velocity in liquids with a high degree of accuracy.
An ultrasonic interferometer is used to determine the accurate ultrasonic velocity in liquids.
The principle used in the measurement of velocity is based on the accurate determination of the wavelength in the medium.
The principle of ultrasonic interferometer for the measurement of velocity is determination of the accurate wavelength in the medium.
Ultrasonic waves of known frequency are produced by quartz crystal fixed at the bottom of the cell.
The quartz crystal fixed at the bottom of cell produced ultrasonic waves of known frequency.
These waves are reflected …show more content…
From the knowledge of wavelength and velocity can be obtained by the relation.
Description
The ultrasonic interferometer consists of following parts a) the high-frequency generator b) measuring cell
The high-frequency generator is designed to excite the quartz crystal fixed at the bottom of the measuring cell, at its resonant frequency to generate ultrasonic waves in the experiment liquid filled in the measuring cell.
A micro meter to observe the changes in the current and two controls for the purpose of sensitivity regulation and initial adjustment of the micro meter are provided on the panel of the high-frequency generator.
b) The measuring cell is a specially designed double-walled cell for maintaining the temperature of the liquid constant during the experiment.
A fine micro meter screw has been provided at the top which can lower or raise the reflector plate in a liquid in the cell through a known distance.it has a quartz crystal fixed at its …show more content…
The ultrasonic waves move normally from the quartz crystal till they are reflected back from the movable plate and the standing waves are formed in the liquid in between the reflector plate and the quartz crystal.
The micrometer is slowly moved till the anode current on the meter on the high-frequency generator shows a maximum.
A number of maxima readings of anode current are noted and their number N counted.
The total distance thus moved by the micro meter gives the value of wavelength with the help of the following relation.
Once the wavelength is known, the velocity v in the liquid can be calculated with the help of the relation given by the equation.
A very small amount of experimental liquid (about 12cc) was required for the velocity measurement.
The temperature of this liquid within the cell could be controlled at any desired value in the range of the room temperature to the boiling point of water, by circulating water at a constant temperature, in the jacket surrounding the cell.
The water at a constant temperature was obtained from the separate assembly consisting of the thermostat and small electric
Working principle An ultrasonic interferometer is a simple and direct device to determine the ultrasonic velocity in liquids with a high degree of accuracy.
An ultrasonic interferometer is used to determine the accurate ultrasonic velocity in liquids.
The principle used in the measurement of velocity is based on the accurate determination of the wavelength in the medium.
The principle of ultrasonic interferometer for the measurement of velocity is determination of the accurate wavelength in the medium.
Ultrasonic waves of known frequency are produced by quartz crystal fixed at the bottom of the cell.
The quartz crystal fixed at the bottom of cell produced ultrasonic waves of known frequency.
These waves are reflected …show more content…
From the knowledge of wavelength and velocity can be obtained by the relation.
Description
The ultrasonic interferometer consists of following parts a) the high-frequency generator b) measuring cell
The high-frequency generator is designed to excite the quartz crystal fixed at the bottom of the measuring cell, at its resonant frequency to generate ultrasonic waves in the experiment liquid filled in the measuring cell.
A micro meter to observe the changes in the current and two controls for the purpose of sensitivity regulation and initial adjustment of the micro meter are provided on the panel of the high-frequency generator.
b) The measuring cell is a specially designed double-walled cell for maintaining the temperature of the liquid constant during the experiment.
A fine micro meter screw has been provided at the top which can lower or raise the reflector plate in a liquid in the cell through a known distance.it has a quartz crystal fixed at its …show more content…
The ultrasonic waves move normally from the quartz crystal till they are reflected back from the movable plate and the standing waves are formed in the liquid in between the reflector plate and the quartz crystal.
The micrometer is slowly moved till the anode current on the meter on the high-frequency generator shows a maximum.
A number of maxima readings of anode current are noted and their number N counted.
The total distance thus moved by the micro meter gives the value of wavelength with the help of the following relation.
Once the wavelength is known, the velocity v in the liquid can be calculated with the help of the relation given by the equation.
A very small amount of experimental liquid (about 12cc) was required for the velocity measurement.
The temperature of this liquid within the cell could be controlled at any desired value in the range of the room temperature to the boiling point of water, by circulating water at a constant temperature, in the jacket surrounding the cell.
The water at a constant temperature was obtained from the separate assembly consisting of the thermostat and small electric