Sensor module comprising acceleration sensor and relative displacement sensor, damper and electronically controllable suspension system comprising the same, and method of controlling vehicle movement using the same

A sensor module which is coupled to a damper so as to detect a relative displacement of a piston rod having a groove pattern and an acceleration of an object in which the damper is installed, comprising:

• a magnet for generating magnetic field;
• a GMR sensor which is disposed between the magnet and the piston rod so as to detect a change of magnetic field generated by the groove pattern when the piston rod is moved and thus to output an electric signal;
• a signal processing part which processes an output signal from the GMR sensor and then outputs a square wave;
• an acceleration sensor for detecting an acceleration at least in a z-axial direction;
• a housing in which the magnet, the GMR sensor, the signal processing part and the acceleration sensor are received;
• and
• a cable which is extended to an outside of the housing so as to transfer an output signal of the signal process part and the output signal of the acceleration sensor to a control module of a vehicle.