Study on the Main Factors of Frequency Variation of LC Resonant Prestress Detection Method

Table 1

Table of experimental parameters.

Parameter	Permeability	Length (m)	Stress (MPa)
Numerical value	7-Ф9 mm steel/aluminum strands	16.5, 16, …, 6	100, 200, …, 900
Note appended	ur ≈ 1500, ur ≈ 1, see Figure 10	See Figure 11	See Figure 12