초록 ▼

A GMI sensor for determining spin rate of a rotating body within an external magnetic field is presented. The sensor comprises an oscillator generating an AC drive signal at an oscillator output terminal. A voltage divider circuit includes a first terminal AC coupled to the oscillator output termina

A GMI sensor for determining spin rate of a rotating body within an external magnetic field is presented. The sensor comprises an oscillator generating an AC drive signal at an oscillator output terminal. A voltage divider circuit includes a first terminal AC coupled to the oscillator output terminal through a coupling capacitor, and a second terminal electrically connected to a reference ground. The voltage divider circuit further includes a GMI fiber having a GMI junction terminal. The fiber is disposed in fixed relation to the rotating body such that impedance of the fiber is modulated by the external magnetic field to provide a modulated drive signal at the GMI junction terminal. A signal processing circuit is electrically connected to the GMI junction terminal to processes the modulated drive signal and provide an output signal indicative of the spin rate of the rotating body.

대표청구항 ▼

1. A GMI sensor for determining spin rate of a rotating body within an external magnetic field, the sensor comprising;an oscillator generating an AC drive signal at an oscillator output terminal; a first voltage divider circuit having, a first terminal AC coupled to the oscillator output terminal th

1. A GMI sensor for determining spin rate of a rotating body within an external magnetic field, the sensor comprising;an oscillator generating an AC drive signal at an oscillator output terminal; a first voltage divider circuit having, a first terminal AC coupled to the oscillator output terminal through a coupling capacitor, a second terminal electrically connected to a reference ground, and a GMI fiber connected between the first and second terminals and having a GMI junction terminal, the fiber disposed in fixed relation to the rotating body such that the fiber rotates with the body and an impedance generated within the fiber is modulated by an external magnetic field to provide a modulated drive signal at the GMI junction terminal; and a signal processing circuit electrically connected to the GMI junction terminal, the signal processing circuit processing the modulated drive signal to provide an output signal indicative of the spin rate of the rotating body.