explain the workin of SONAR with simple diagram???? and expand SONAR??

SONAR

SONAR (acronym for Sound Navigation and Ranging) is an acoustic device that is installed in ships to measure depth, direction, and speed of underwater objects such as icebergs, sea rocks, shipwrecks, spy submarines, etc. It uses high frequency ultrasound for this purpose and works on the principle of echo. It consists of two main devices called transducer and detector.Transducer produces and transmits ultrasonic sound and detector receives the ultrasound that is reflected from the bottom of a sea or an underwater object. SONAR measures the echo of the ultrasound and calculates the depth or distance of underwater objects using the relation,

2d = v × t

Where d = Distance between the ship and the underwater object

v = Speed of ultrasound in water

t = Time taken by the echo to return from the object

This method of measuring distance is known as echo ranging.

  • 0

SONAR stands for sound navigation and ranging . SONAR is a device which is used by ships and submarines to locate position of other vessels in the ocean. These are of two types. One is passive, which only detects the incoming. Another one is active SONAR which transmits sound pulses and detects the reflected echoes to detect presence of other sea vessels.

Principle behind SONAR is reflection of sound.

The sound sent is reflected back from the sea bed which is known as echo.

Let the depth of the ocean be D

For perpendicular focusing of the sonar

V = 2D/t

=>D = Vt/2

Where V = speed of sound in water

t = time after the echo is detected.

Thus, depth of the ocean is evaluated.

 

Sonar is a very useful technique which can help determine what lies beneath the ship, boat or a submarine. It has been used to discover shipwrecks, lost treasures, sunken features etc.

It is also used in military for detecting the presence of enemy ships .

  • 2
What are you looking for?