Wiegand wire

[′vē·gänt ‚wīr] (electricity) A work-hardened wire whose magnetic permeability is much greater near its surface than at its center.

Wiegand wire

An iron-alloy wire that has unique magnetic properties. Invented by John Wiegand in 1972 and used in sensor applications, the Wiegand wire's outer layer can be magnetized without affecting the inner core. When an external magnetic field is applied, the core switches polarity to that direction and emits a large pulse. As the field is intensified, a smaller pulse is emitted.

Magnetic Key Codes
Used in keycard door locks, the plastic keycards have two embedded rows of Wiegand wires in a specific polarity pattern that represents a 26-bit ID number. When run through a magnetic field strong enough to switch the polarities of the inner cores, pulses are generated. The pulses energize a coil that creates a signal detected by a sensor. Although Wiegand cards are not as predominant as they were in the past, the 26-bit ID format has been carried over to many access control systems. See access control.

单词	wiegand wire
释义	Wiegand wire Wiegand wire [′vē·gänt ‚wīr] (electricity) A work-hardened wire whose magnetic permeability is much greater near its surface than at its center. Wiegand wire An iron-alloy wire that has unique magnetic properties. Invented by John Wiegand in 1972 and used in sensor applications, the Wiegand wire's outer layer can be magnetized without affecting the inner core. When an external magnetic field is applied, the core switches polarity to that direction and emits a large pulse. As the field is intensified, a smaller pulse is emitted. Magnetic Key Codes Used in keycard door locks, the plastic keycards have two embedded rows of Wiegand wires in a specific polarity pattern that represents a 26-bit ID number. When run through a magnetic field strong enough to switch the polarities of the inner cores, pulses are generated. The pulses energize a coil that creates a signal detected by a sensor. Although Wiegand cards are not as predominant as they were in the past, the 26-bit ID format has been carried over to many access control systems. See access control.
随便看	odha odhag odhall right odhap odhb odhc odhd odhe odhg odhgabfe odhh odhhs odhhsp odhi odhin odhinn odhl odho odhp odhr odhrm odhs odi odi4 odia