Resonance enhanced magnetoelastic method with high sensitivity for steel stress measurement. (December 2021)

• Record Type: Journal Article
• Authors: Zhang, Senhua; Zhang, Hong; Liu, Huiling; Zhou, Jianting; Yin, Changhua; Liao, Leng
• Is Part Of: Measurement. Volume 186(2021)
• Publication Date: 2021-12
• Subjects: Steel -- Stress -- Magnetoelastic -- Resonance -- High sensitivity; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2021.110139
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Enhanced by the resonance, the sensitivity increased by 47.2%. The average error of the REME method was 9.5%. The method can measure monotonically varying stress and alternating stress. The REME sensor has a good dynamic response and needs a low power supply. The resonance enhancement can be applied to other coil-based sensors. Abstract: To increase the test sensitivity, the resonance theory was introduced to the magnetoelastic method. After analyzing the correlation between the stress and the induced voltage, the resonance enhanced magnetoelastic (REME) method was proposed. A REME sensor with a low resonant frequency was made to carry out the experiment. The results showed that the resonant frequency, the resonant voltage, and the induced voltage could be used to measure stress, the test errors were 12.5%, 11.9%, and 9.5%, respectively. To measure stress, the excitation frequency should be close and lower than the resonant frequency. Enhanced by the resonance theory, the sensitivity of the REME method was 132.47% and 286.50% higher than that corresponding to the resonant voltage and the resonant frequency. The REME method has the advantages of low power supply and good dynamic response. Besides, using the resonance theory to enhance the measurement is applied to other coil-based sensors and methods.