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e-book Physical Principles of Ultrasonic Technology

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It calculates the time taken between sending sound waves and receiving echo. The distance of obstacle or discontinuities in metals is related to velocity of sound waves in a medium through which waves are passed and the time taken for echo reception.

Nondestructive testing for earlier assessment of damage to structures

Hence the ultrasonic detection can be used for finding the distances between particles, for detecting the discontinuities in metals and for indicating the liquid level. Ultrasonic sensors are used for distance measuring applications. These gadgets regularly transmit a short burst of ultrasonic sound to a target, which reflects the sound back to the sensor. The system then measures the time for the echo to return to the sensor and computes the distance to the target using the speed of sound within the medium.

Ultrasonic Technology - How it Works

Different sorts of transducers are utilized within industrially accessible ultrasonic cleaning devices. An ultrasonic transducer is affixed to a stainless steel pan which is filled with a solvent and a square wave is applied to it, conferring vibration energy on the liquid.

Application of Ultrasound in Medicine

The ultrasonic distance sensors measures distance using sonar; an ultrasonic well above human hearing beat is transmitted from the unit and distance-to-target is determined by measuring the time required for the echo return. Output from the ultrasonic sensor is a variable-width beat that compares to the distance to the target. Ultrasonic sensor module comprises of one transmitter and one receiver.

The transmitter can deliver 40 KHz ultrasonic sound while the maximum receiver is designed to accept only 40 KHz sound waves. The receiver ultrasonic sensor that is kept next to the transmitter shall thus be able to receive reflected 40 KHz, once the module faces any obstacle in front. Upon receiving the signal MC program while executed displays the data i. In the above circuit diagram shows contactless liquid level controller in this diagram ultrasonic sensor module is interfaced with the microcontroller.


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Whenever level distance measured in cm falls down below a set point the pump starts by sensing the signal coming out and receiving level coming to the ultrasonic transducer which is fed to the microcontroller. Ultrasonic sensors are used to detect the presence of targets and to measure the distance to targets in many robotized processing plants and process plants.


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Sensors with an ON or OFF digital output are available for detecting the presence of objects and sensors with an analog output which changes relatively to the sensor to target separation distance are commercially available. Ultrasonic obstacle sensor consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. The sensor detects objects by emitting a short ultrasonic burst and then listening for the eco.

Under control of a host microcontroller, the sensor emits a short 40 KHz explosion. This explosion ventures or travels through the air, hits an article and after that bounces once again to the sensor. The sensor provides an output pulse to the host that will terminate when the echo is detected; hence the width of one pulse to the next is taken into calculation by a program to provide result in distance of the object.

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Now you have understand the applications and basic concept of ultrasonic detection if any queries on this topic or on the electrical and electronic projects leave the comments section below. Please get back to us at info edgefxkits. Leave this field empty. What is the principle of Ultrasonic Detection? Defining sound wave. Ultrasonic energy represents a means to obtain dehydration without affecting the food.

This paper deals with an experimental study about the use of high-intensity ultrasound for vegetable dehydration by using a new power ultrasound generator and a procedure in which ultrasonic vibrations are applied in direct contact with the product and under a certain static pressure. View via Publisher. Open Access. Save to Library.

Ultrasonic transit time measurement - SONOTEC

Create Alert. Share This Paper. Figures from this paper. Citations Publications citing this paper. Enhancement of convective drying by application of airborne ultrasound - a response surface approach. Svenja M. Convective drying of lemon peel assisted by power ultrasound: influence of ultrasonic power applied Antonio Mulet , Juan A. Enhanced sludge dewatering based on the application of high-power ultrasonic vibration. Ultrasound assisted low temperature drying of food materials Henry Sabarez , S.

Keuhbauch , Kai Knoerzer.