Ultrasonic imaging system for the observation of submerged objects

Purpose

Development of an acoustic imaging device for the observation of objects in opaque turbid water. The acoustic imaging device is intended for rescue, construction, and other works in water in conditions of poor optical visibility.

Components of the system and principle of its operation
Prototype of the acoustic imaging device
Prototype of the acoustic imaging device
 
Prototype of the portable acoustic imaging device for divers
Prototype of the portable acoustic imaging device for divers

The acoustic imaging device consists of an underwater hardware unit mounted in a water-tight casing and connected by a cable line with a computer serving for the data processing and display. The principle of operation of the device is as follows. A radiator insonifies an underwater object, and the sound signals reflected from the object are received by an array of piezoelectric elements (sound receivers); the array is connected with an UNIKON cathode ray tube. The electric potentials from the array elements are read out by the electron beam and transformed to a visible image on the monitor screen.

Degree of readiness

A prototype of the acoustic imaging device is developed, manufactured, and tested. The range of operation of the imaging device is no less than 50 m, the angle of aspect is 40 degrees with an angular resolution of 1-1.5 degrees. The depth of submergence of the underwater unit is up to 50 m.

A portable prototype of the acoustic imaging device that can be carried by skin-divers is designed. In this version of the device, a microcomputer is mounted in the underwater unit, and the electroluminescent screen is built into the diver's helmet. The range of operation of this version of the acoustic imaging device is about 5 m, and the angle of aspect is up to 30 degrees with an angular resolution of 0.5 degrees.

The Acoustics Institute accomplishes manufacturing of the device upon a request. Both versions are available: on-board acoustic imaging devices and portable acoustic imaging devices for divers.