Novel Small-Aperture Transducers Based on Magnetostrictive Effect for Diagnostic Systems

Abstract

Small-aperture transducers based on the magnetostrictive effect for the emission and reception of signals in the ultrasonic range in solid materials have been developed. The article discusses their design features and specifications. Attention is paid to the features of the choice of materials, shapes, and geometrical dimensions of the excitation coil, damper, and magnet. Structural and electrical circuits of the developed transducers are given. Some design and technological solutions have been proposed that can increase the radiation power by 10 times, and resolution by 2-3 times, compared with existing analogs. The area of the radiating part of the sensor is from 0.07 to 0.2 mm2. Such transducers can be used in various diagnostic systems to detect defects in power equipment, aircraft products, industrial equipment, etc. References 22, figures 10, tables 4.

Enhanced phase method of signal detection for ultrasonic magnetostriction defectoscopy of power equipment

“…For conducting the physical experiment the MS was used, the design of which is presented in [15]− [16]. The experiments used a probing ultrasonic radio signal (1) with a carrier signal f = 0.5 MHz and a duration of In Fig.…”

“…Under such conditions, detection of signals from the signal-noise mixture becomes difficult. In part, this problem can be solved due to the use of constructive methods of increasing the power of the emitting and the sensitivity of the receiving sensors [15]− [16]. Another way to solve this problem is to improve methods of processing signals of magnetostrictive receivers.…”

Some Features of Modeling Ultrasound Propagation in Non-Destructive Control of Metal Structures Based on the Magnetostrictive Effect

“…Defect-Free Area Area with Crack 12. The time it takes for the signal to pass from the emitter to the receiver is 14 μs, t = 13.2•10 −6 s. Next, the converters were connected (Figure 13) and the oscillograms were taken (Figure 14) to determine the total signal delay time in the waveguides of the emitter and receiver [51]. The time it takes for the signal from the transmitter to reach the receiver is 7 microseconds.…”