Device and measuring method for measuring magnetoconstriction coefficient through multi-beam laser heterodyne secondary harmonic method
A technology of magnetostriction coefficient and laser heterodyne, applied in magnetostrictive performance measurement, magnetic performance measurement, etc., can solve the problems of slow signal processing operation speed, low measurement accuracy, and poor acquisition effect of laser difference frequency signals
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specific Embodiment approach 1
[0062] Specific implementation mode 1. Combination figure 1 Illustrate this specific embodiment, the device of multi-beam laser heterodyne second harmonic measurement magnetostriction coefficient, it comprises the first fixed rod 1-1, the second fixed rod 1-2, excitation coil 2, iron-nickel alloy to be measured Sample 3, DC stabilized power supply 4, plane mirror 5, thin glass plate regardless of thickness 6, polarizing beam splitter PBS7, H0 solid-state laser 8, quarter-wave plate 9, vibrating mirror 10, converging lens 11, photoelectric detection device 12 and signal processing system 13,
[0063] The DC stabilized power supply 4 is used to provide working power for the excitation coil 2, the iron-nickel alloy sample 3 to be tested is placed in the center of the excitation coil 2, and one end of the iron-nickel alloy sample 3 to be tested is fixedly connected to one end of the first fixed rod 1-1 , the other end of the first fixed rod 1-1 is fixedly arranged, the other end ...
specific Embodiment approach 2
[0067] Embodiment 2. The difference between this embodiment and the device for measuring magnetostriction coefficient by multi-beam laser heterodyne second harmonic described in Embodiment 1 is that the distance d is 20 mm, which can be set arbitrarily according to needs.
specific Embodiment approach 3
[0068] Embodiment 3. The difference between this embodiment and the device for measuring the magnetostriction coefficient by multi-beam laser heterodyne second harmonic described in Embodiment 1 or 2 is that the first fixed rod 1-1 and the second fixed rod 1-1 Both end faces of the rod 1-2 are glued with non-magnetic materials.
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