Abstract: The present technology relates to a battery cell jig for fastening bolts with uniform pressure when fixing a battery cell between first and second plates by applying the same rotating force to a plurality of bolt fastening units. The battery cell jig includes first and second plates arranged to face each other, n bolt fastening units, where the n is an integer equal to or greater than 2, a rotating member which is installed on one surface of the first plate or the second plate and is installed on an opposite side of a surface where the first and second plates face each other, and a driving unit which transmits rotating force of the rotating member to each of the n bolt fastening units.

Abstract: The present invention is advantageous in that the shape of the catheter can be sensed by detecting the position of bending of the catheter body, the direction thereof, the angle thereof, and the curvature thereof through a triplet calculation of information regarding three wavelengths that have undergone a transition along respective FBGs provided on three optical cores.

Abstract: According to the present invention, it is possible to provide a catheter capable of measuring the magnitude and direction of an external force applied to the front end of the catheter with a precise sensitivity by using information regarding the amount of change in the amount of light received by the optical fiber inside the catheter body.

Abstract: The present invention is advantageous in that the shape of the catheter can be sensed by detecting the position of bending of the catheter body, the direction thereof, the angle thereof, and the curvature thereof through a triplet calculation of information regarding three wavelengths that have undergone a transition along respective FBGs provided on three optical cores.