Abstract: A buckle, such as a vehicle seat belt buckle, operable between a buckled and unbuckled condition. A sensor integrated circuit in the buckle senses the buckled or unbuckled condition of the buckle and generates an electrical signal indicative of the buckled or unbuckled condition of the buckle. A RF integrated circuit in the buckle and in the form of a microcontroller integrated circuit with an RF signal transmitter receives the electrical signal generated by the sensor integrated circuit and transmits an RF signal indicative of the buckled or unbuckled condition of the buckle to a vehicle's control unit via an RF signal antenna in the buckle. A battery in the buckle provides power to the sensor and RF integrated circuits.

Abstract: A buckle, such as a vehicle seat belt buckle, operable between a buckled and unbuckled condition. A sensor integrated circuit in the buckle senses the buckled or unbuckled condition of the buckle and generates an electrical signal indicative of the buckled or unbuckled condition of the buckle. A RF integrated circuit in the buckle and in the form of a microcontroller integrated circuit with an RF signal transmitter receives the electrical signal generated by the sensor integrated circuit and transmits an RF signal indicative of the buckled or unbuckled condition of the buckle to a vehicle's control unit via an RF signal antenna in the buckle. A battery in the buckle provides power to the sensor and RF integrated circuits.

Abstract: A wireless rotational speed sensor system that includes a coil wound around a permanent magnet, the coil co-operating with a rotating ferrous target to induce a voltage for powering an active speed sensor element. The active speed sensor generates an output signal that is a function of the rotational speed of the target. The output signal is supplied to a wireless transmitter and antenna for transmission to other electronic components.

Abstract: A wheel speed sensor and bearing assembly for use in a wheel end assembly of a vehicle. The assembly includes an outer race, an inner race, a bearing unit, a spindle, a wheel speed sensor and a tone wheel. The outer race includes an opened inboard end, an opened outboard end, and at least one bearing seat. The inner race includes at least one bearing seat. The bearing unit is disposed between the bearing seats of the outer race and inner race. The spindle is adapted to be secured to a fixed component of the vehicle and includes an inboard end, an outboard end, and an opening formed therethrough. The wheel speed sensor is operatively connected to the spindle adjacent the outboard end thereof. The wheel speed sensor includes an outer magnet surface. The tone wheel is operatively secured to the outer race adjacent the opened outboard end thereof. The tone wheel includes an inner surface which is positioned in a spaced apart relationship relative to the outer magnet surface of the wheel speed sensor.

Abstract: A rotational sensor system for detecting rotational velocity and rotational direction of a rotating member, such as a vehicle axle, including a tone ring mounted to the rotating member. The system includes a pair of active sensors mounted adjacent to the tone ring and spaced from one another, which, when activated, produce an electric signal in response to movements in the tone wheel. A processor receives the electric signals from the sensors and generates a signal indicative of rotational velocity and rotational direction of the rotating member. Also, preferably, an output signal is created that uses square waves with different amplitude levels for the signal highs and lows depending upon the direction of rotation.

Abstract: A rotational sensor system for detecting rotational velocity and rotational direction of a rotating member, such as a vehicle axle, including a tone ring mounted to the rotating member. The system includes a pair of active sensors mounted adjacent to the tone ring and spaced from one another, which, when activated, produce an electric signal in response to movements in the tone wheel. A processor receives the electric signals from the sensors and generates a signal indicative of rotational velocity and rotational direction of the rotating member. Also, preferably, an output signal is created that uses square waves with different amplitude levels for the signal highs and lows depending upon the direction of rotation.

Abstract: An encoder for an active speed sensor includes a non-metallic body embedded with magnetized ferrous particles generating a magnetic field. The encoder is mounted radially between inner and outer races of a wheel bearing and axially between a spaced pair of rollers of the bearing. The body is attached to a press ring that is retained on the inner race by a press fit. A non back-biased sensor extends through the outer ring proximate the body.