铁磁材料巴氏噪声应力检测仪

Development of Ferromagnetic Material Stress Instrument Using the Barkhausen Noise Technique

巴氏噪声是当铁磁材料受到交变磁场的作用时,由安放在其表面的控测线圈所接收到的一种噪声式的电脉冲信号。该信号与材料的许多性质都有密切关系。文中介绍利用该技术研制的一台巴氏噪声应力检测仪的电路组成及工作原理。

Barkhausen Noise is the electrical impulse signal received by the testing coil attached to the surface of the ferromagntic material that is being magnetized by an alternating magnetic field. Barkhausen Noise is closely related to many characters of ferromagnetic materials. In this paper, the circuit and the principle of a instrument for testing the stresses in ferromagnetic materials using Barkhausen Noise technique is introduced.