ArticleSensors (Basel, Switzerland)2023
A New Design to Rayleigh Wave EMAT Based on Spatial Pulse Compression.
Article in Sensors (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Improvement of EMAT Butterfly Coil for Defect Detection in Aluminum Alloy Plate.Materials (Basel, Switzerland) · 2025Article
- Non-Contact Laser Ultrasound Detection of Internal Gas Defects in Lithium-Ion Batteries.Sensors (Basel, Switzerland) · 2025Article
- A Review of Recent Advances in Unidirectional Ultrasonic Guided Wave Techniques for Nondestructive Testing and Evaluation.Sensors (Basel, Switzerland) · 2025Review
- A review of ultrasound monitoring applications in agriculture.Frontiers in plant science · 2025Review
- A Multi-Strategy Hybrid Sparse Reconstruction Method Based on Spatial-Temporal Sparse Wave Number Analysis for Enhancing Pipe Ultrasonic-Guided Wave Anomaly Imaging.Sensors (Basel, Switzerland) · 2024Article
- A Phase-Sensitive Optical Time Domain Reflectometry with Non-Uniform Frequency Multiplexed NLFM Pulse.Sensors (Basel, Switzerland) · 2023Article
- Development of DMPS-EMAT for Long-Distance Monitoring of Broken Rail.Sensors (Basel, Switzerland) · 2023Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The main disadvantage of the electromagnetic acoustic transducer (EMAT) is low energy-conversion efficiency and low signal-to-noise ratio (SNR). This problem can be improved by pulse compression technology in the time domain. In this paper, a new coil structure with unequal spacing was proposed for a Rayleigh wave EMAT (RW-EMAT) to replace the conventional meander line coil with equal spacing, which allows the signal to be compressed in the spatial domain. Linear and nonlinear wavelength modulations were analyzed to design the unequal spacing coil. Based on this, the performance of the new coil structure was analyzed by the autocorrelation function. Finite element simulation and experiments proved the feasibility of the spatial pulse compression coil. The experimental results show that the received signal amplitude is increased by 2.3~2.6 times, the signal with a width of 20 μs could be compressed into a δ-like pulse of less than 0.25 μs and the SNR is increased by 7.1-10.1 dB. These indicate that the proposed new RW-EMAT can effectively enhance the strength, time resolution and SNR of the received signal.
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Registered trials
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