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 in the direction running roughly along a line of magnetic force of the side of a material to be inspected of a magnet, and the direction in which a magnetic flux density decreases at the time when the carburized part has approached, respectively. CONSTITUTION:In case a carburized part 16 having an expanse in the inside of a tube 15, when a probe 10 approaches, a magnetic field of a magnet 12 is influenced by a high magnetic permeability of the carburized part 16 and attracted strongly, and an inclination is generated in a line of magnetic force passing through a Hall element 13. Therefore, an output waveform of the Hall element 13 goes to one which has raised an electromotive voltage in both end parts of the carburized part 16. On the other hand, when the line of magnetic force is attracted strongly by the carburized part 16, a magnetic flux density of the line of magnetic force passing through a Hall element 14 decreases, therefore, when the electromotive voltage of the Hall element 14 shows a value of a prescribed level or below, it is decided that the carburized part 16 having an expanse exists in its position, and also an area of its carburized part 16 can be decided.

Inventors

• 👤 Makoto Takahashi
• 👤 誠 高橋

Bibliographic Details