Quantitatively monitoring the thickness reduction of a pipe by using magnetic flux density method remains a major challenge due to the small and gradual change in magnetic flux density over a long distance along a pipe. This signal change is hindered in the background signal of a detector that has a high temperature dependence and unstable background signal.

In this paper, we verify the effectiveness of magnetic flux density method in quantitatively monitoring thickness reduction through simulation and experimental verification. Experimental results show that the proportion of magnetic signal change is 1.4 mT per 10% wall loss.

To support this quantitative approach, we optimise an original ultra-high-sensitivity planar Hall sensor with high thermal stability and stable background signal versus time for measurement of the magnetic field over a wide range from 0 to 50 mT. The quantitative measurements were validated on test pipes with varying thickness steps of 0.5 mm.

由于沿管道的长距离磁通密度的变化很小且逐渐变化，因此使用磁通密度方法定量监测管道的厚度减少仍然是一个主要挑战。这种信号变化在具有高温度依赖性和不稳定背景信号的检测器的背景信号中受到阻碍。

在本文中，我们通过仿真和实验验证来验证磁通密度方法在定量监测厚度减少量方面的有效性。实验结果表明，每 10% 的壁损，磁信号变化的比例为 1.4 mT。

为了支持这种定量方法，我们优化了具有高热稳定性和稳定的背景信号随时间变化的原始超高灵敏度平面霍尔传感器，用于在 0 到 50 mT 的宽范围内测量磁场。定量测量在具有 0.5 毫米不同厚度步长的试管上进行了验证。