Carburization measuring probe

Abstract

Abstract PURPOSE:To measure not only depth of a carburized part but also the carburized part having an expanse by providing a Hall element on the center part between a pair of magnetic poles of the first magnet, and providing a magnetic sensor between the second magnet and a material to be inspected. CONSTITUTION:In case a carburized part 18 does not exist in a tube 16, an electromotive voltage of a Hall element 14 shows zero or a low level, and an electromotive voltage of a Hall element 15 is large. In case when the carburized part 18 having an expanse in the inside of the tube 16, when a prover approaches, a magnetic field of the first magnet 12 is influenced by a high magnetic permeability of the carburized part 18 and attracted strongly, and an output waveform of the Hall element 14 becomes that which has raised the electromotive voltage in both end parts of the carburized part 18. On the other hand, when a line of magnetic force is attracted strongly by the carburized part 18, a magnetic flux density of the line of magnetic force passing through the Hall element 15 is further increased, therefore, when its electromotive voltage shows a value of a prescribed level or below, it is decided that the carburized part 18 having an expanse exists in its position.

Inventors

• 👤 Makoto Takahashi
• 👤 誠 高橋

Bibliographic Details