Abstract: An angle sensing device including a first cover body, a second cover body, a rotating mechanism, a first magnetic element, a second magnetic element, a first magnetic sensor, a second magnetic sensor, and a controller is provided. The first magnetic sensor is configured to sense a magnetic field generated by the first magnetic element. The second magnetic sensor is disposed on an end of the first cover body away from the rotating mechanism corresponding to a position of the second magnetic element, and is configured to generate an auxiliary signal when the second magnetic element approaches. The controller receives the magnetic field sensed by the first magnetic sensor to calculate an included angle between the second cover body and the first cover body. The controller judges whether the second cover body and the first cover body are in a closed state or an open state according to the auxiliary signal and the calculated included angle.

Abstract: An angle sensing device including a first cover body, a second cover body, a rotating mechanism, a first magnetic element, a second magnetic element, a first magnetic sensor, a second magnetic sensor, and a controller is provided. The first magnetic sensor is configured to sense a magnetic field generated by the first magnetic element. The second magnetic sensor is disposed on an end of the first cover body away from the rotating mechanism corresponding to a position of the second magnetic element, and is configured to generate an auxiliary signal when the second magnetic element approaches. The controller receives the magnetic field sensed by the first magnetic sensor to calculate an included angle between the second cover body and the first cover body. The controller judges whether the second cover body and the first cover body are in a closed state or an open state according to the auxiliary signal and the calculated included angle.

Abstract: Provided is a displacement sensing device adapted to sense a displacement of an object. The displacement sensing device includes a magnetic element array, a first magnetic sensor, a second magnetic sensor, a third magnetic sensor and a computing unit. The first magnetic sensor, the second magnetic sensor and the third magnetic sensor are adapted to move relative to the magnetic element array along a column direction, and are configured to sense components of a magnetic field generated by the magnetic element array in the column direction and a row direction. When the magnetic element array moves relative to the first magnetic sensor, the second magnetic sensor and the third magnetic sensor, the computing unit selects a signal sensed by one of the first magnetic sensor, the second magnetic sensor and the third magnetic sensor to compute the displacement of the object.

Abstract: Disclosed is a movement sensing device adapted to sense an amount of movement of an object. The movement sensing device includes a first magnetic sensor, a second magnetic sensor, a special-shaped magnetic element, and a controller. The special-shaped magnetic element has a magnetization direction, is connected with the object, and is adapted to be moved along a direction parallel to a connection line between the first magnetic sensor and the second magnetic sensor. The special-shaped magnetic element, the first magnetic sensor, and the second magnetic sensor are disposed on a plane. The magnetization direction is perpendicular to the plane. The controller is electrically connected to the first magnetic sensor and the second magnetic sensor. The controller calculates the amount of movement according to a difference between magnetic forces sensed by the first magnetic sensor and the second magnetic sensor from the special-shaped magnetic element.