流体静高压原位磁测量的误差研究──（1）漏磁场的影响

 通过五种不同环境分别做原位磁测量和对比，详细研究了13层密绕直螺线管的漏磁通在同步箍紧式高静水压容器内引起的相对误差（Δc₀/c₀）。结果表明：（1）对于空心次级线圈，Δc₀/c₀为-1.90%～-1.27%（400 Hz）或-0.36%～-0.64%（1 000 Hz）。（2）对于钝铁纳米微粉的（Fe-5H）样品，其磁化曲线及起始磁化曲线均为直线，即具有恒磁导率μ。漏磁通过在高压容器内引起的相对误差，Δμ/μ＝3.9%～3.8%，比（2）约大一倍。

Research on Errors in Situ of Magnetic Measurement in High Hydrostatic Pressure Vessel－(1) The Influence of Leakage Flux

In order to research the influence of leakage flux in high hydrostatic pressure vessel, we have measured the magnetization curve under five different ambient conditions, then compared the B-H curve measured on table far from iron with B-H curve measured in situ in pressure vessel. Finally we calculated the relative errors, Δc₀/c₀, produced by leakage flux of electric solenoid with 13 layers in pressure vessel. The results show that (1) for empty secondary coil, Δc₀/c₀=-1.90%～-1.27% (400 Hz), -0.36%～-0.64% (1 000 Hz); (2) for Fe nanometer-scale powder, magnetization curve and initial B-H curve are all straight lines, i.e. both of them possess constant magnetic permeability, μ. Relative errors produced by leakage flux in high pressure vessel, Δμ/μ=3.9%～3.8%, about one time higher than that of (1).