S & T Daewoo Co. Ltd.

Jae-Woo Park

Dong-Rak Lee

Min-Ho Chin

Bong-Geun Cho

Hyoung-Jun Moon

Chang-do Huh

The present invention relates to a cylinder which has hollow portion therein; a piston rod which is inserted through an upper side of the cylinder and has a groove pattern having plurality of convex portions and concave portions which are alternately formed; a piston valve which is connected with a lower end of the piston rod so as to be reciprocated in the cylinder and has a fluid passing hole which is formed in an up and down direction; a rod guide which closes up an upper end of the cylinder tightly and guides an up-down movement of the piston rod and which has a through-hole at a side portion thereof; and a sensor module which is installed to the rod guide so as to detect a movement of the piston rod by using a variation in magnetic field generated when the piston rod is moved.

Damper equipped with relative displacement detecting sensor

The present invention relates to a sensor module for detecting a relative displacement of an object having a groove pattern with alternately formed projection and depression, which comprises a magnet for generating a magnetic field; a giant magneto resistance (GMR) sensor installed between the magnet and the object to detect a variation in the magnetic field and output an electric signal; a signal processing part for processing the output signal from the GMR sensor to output a square wave; and a housing for supporting the magnet, the GMR sensor and the signal processing part, and a method of detecting a moving direction using the same.

Growing community of inventors

Gyeongsangnam-do, South Korea

Jae-Woo Park