Non-destructive testing, new development.

[27.01.2015]

Proximity sensors designed elastic oscillations (vibrations) in conductive materials. Underlying the decision of the sensors provides a number of advantages compared to "traditional" eddy current probes: · solve the problem of heating coil inductor; · eliminate the effect of the inductor on the receiving part of the control system; · get the level of the magnetic field strength of 2-3 orders of magnitude larger than the values in the "traditional" system with a proportional increase in sensitivity. Appointment of sensors: the transformation of elastic waves in conductive materials and media into an electrical signal for use in systems of acoustic diagnostics responsible products and mechanisms. Scope: · acoustic diagnostics responsible products by free oscillations; · vibrodiagnostics responsible products and machinery; · acoustic diagnostics responsible products and mechanisms resonance method. Way to get information: According to GOST 18353-79 by the process of obtaining information sensors are electromagnetic acoustic transducer, registering an electromagnetic field eddy currents in the conductive medium of controlled products as a result of the interaction of the medium in oscillation mode with the constant field of the inductor. Especially the principle of work: By way of interacting with the environment controlled inverter products, sensors can be attributed principally to the type of eddy current, but the excitation of eddy currents in the test object is performed on a different principle, which significantly expands the capabilities of the proposed equipment. In contrast to "traditional" systems proposed in the eddy currents excitation devices manufactured using high-powered rare earth permanent magnet that is part of the sensor. Benefits: This solution provides a number of advantages compared to "traditional" eddy current probes: · solve the problem of heating coil inductor (coil inductor function performs heavy duty rare earth magnet); · eliminate the effect of the inductor on the receiving part of the control system; · get the level of the magnetic field strength of 2-3 orders of magnitude larger than the values in the "traditional" system with a proportional increase in sensitivity; · Get the operating frequency range (registration elastic oscillations and vibrations) from fractions of Hz to hundreds of kHz; · Sensors allow the registration of elastic vibrations and vibration environment of controlled goods through the heat insulating layer and a metal protective cover; · Does not require the preparation and cleaning of the surface; · Sensors allow the registration of elastic vibrations and vibration environment of high temperature objects.

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