Steel characteristics measurement system using Barkhausen jump sum rate and magnetic field intensity and method of using same

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:870897

Kohn, Gabriel ^[1]; Hicho, George ^[2]; Swartzendruber, Lydon ^[3]

---

1. Omer, IL
2. Derwood, MD
3. New Carrollton, MD

A steel hardness measurement system and method of using same are provided for measuring at least one mechanical or magnetic characteristic of a ferromagnetic sample as a function of at least one magnetic characteristic of the sample. A magnetic field generator subjects the sample to a variable external magnetic field. The magnetic field intensity of the magnetic field generated by the magnetic field generating means is measured and a signal sensor is provided for measuring Barkhausen signals from the sample when the sample is subjected to the external magnetic field. A signal processing unit calculates a jump sum rate first moment as a function of the Barkhausen signals measured by the signal sensor and the magnetic field intensity, and for determining the at least one mechanical or magnetic characteristic as a function of the jump sum rate first moment.

• Research Organization: American Iron and Steel Institute, Washington, DC (United States)
• DOE Contract Number: FC07-93ID13205
• Assignee: American Iron and Steel Institute (Washington, DC)
• Patent Number(s): US 5619135
• OSTI ID: 870897
• Country of Publication: United States
• Language: English

Related Subjects

steel
characteristics
measurement
barkhausen
jump
rate
magnetic
field
intensity
method
hardness
provided
measuring
mechanical
characteristic
ferromagnetic
sample
function
generator
subjects
variable
external
generated
generating
means
measured
signal
sensor
signals
subjected
processing
unit
calculates
moment
determining
processing unit
field generating
generating means
signal processing
magnetic field
field intensity
field generated
external magnetic
signal process
field generator
magnetic characteristic
/324/73/702/