Defectoscope

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Defectoscope

 

a device for detecting flaws in articles made from various metallic and nonmetallic materials by methods of nondestructive testing. Defectoscopes of several types, such as magnetic, X-ray, ultrasonic, induction, and capillary varieties, are in use.

Defectoscopes may be designed as portable and laboratory instruments or as stationary installations. Portable defectoscopes usually incorporate a very simple flaw-detection indicator (an instrument with a pointer or an optical or acoustical signaling device). Laboratory defectoscopes are more sensitive and are often equipped with an oscilloscope or digital indicators. In stationary defectoscopes, which are the most versatile, provision is usually made for automatic recording of the readings and for an objective evaluation of the recorded data. Some defectoscopes make possible the inspection of articles moving at considerable speeds (for example, pipe in the process of rolling), or the defectoscope itself can move at a great speed in relation to the article (for example, defectoscopes mounted on cars or carriages and moving over rails). Defectoscopes designed for quality control of articles heated to a high temperature also exist.

D. S. SHRAIBER

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
During a defectoscope control the crack has been observed, when it has appeared on the surface.
Using ultrasonic defectoscope equipment close to the ideal, the largest distance [a.sub.u] from the ultrasonic transducer at which signals still occur and can be visualized is equal to half the distance that the ultrasound waves passes until new ordinary acoustic impulse are sent and the distance measuring system returns to primary state.
Lack of a quality housing cover, sound insulation, and absorption properties can cause phantom reflections that are displayed on a defectoscope screen and may look as if they are located in the field of research.
Other causes of multiple reflections are characteristic of the same material structural inequalities in the material (grain), who causes these false (in terms of the defectoscope) structural reflections.
Now remote contactless ways of preventive control of insulators with use of electron-optical defectoscopes [2-7] are used.