Wheel speed sensor having multiple sensing units and wheel bearing comprising same

A wheel speed sensor mounted on a wheel bearing to detect a rotational speed of a wheel, comprising:

• a housing;
• a first sensing module configured to detect a rotational speed of the wheel and to output a first detection signal to an outside;
• and
• a second sensing module configured to detect the rotational speed of the wheel independently of the first sensing module and to output a second detection signal to the outside,
• wherein the first sensing module comprises a first sensing part configured to detect a rotational speed of the wheel, and the second sensing module comprises a second sensing part configured to detect the rotational speed of the wheel,
• wherein the housing includes a housing body portion formed in a cylindrical cap shape with one side opened and a connector part positioned on one side of the housing body portion;
• the first sensing part and the second sensing part include a sensor disposed adjacent to a sensor target mounted on a rotary element of the wheel bearing and configured to sense a change in magnetic field and a plurality of lead terminals extending from the sensor;
• the first sensing module further includes a first terminal portion electrically connected to the first sensing part, and the second sensing module further includes a second terminal portion electrically connected to the second sensing part;
• and
• the first sensing module and the second sensing module are provided in the housing, and the first sensing module and the second sensing module are separated from each other in a circumferential direction of the housing, and
• wherein the first sensing part of the first sensing module is accommodated in a first insert body;
• the second sensing part of the second sensing module is accommodated in a second insert body;
• the first insert body and the second insert body are formed separately from each other;
• and
• the first sensing module and the second sensing module are configured such that end portions thereof are exposed to the outside through one connector part formed in the housing.