Patent ID: 8486576

Claim:
An in-line height measurement system for planar fuel cell comprising: a main stand, a top platform provided above a furnace, a displacement detection unit on the top platform with a central axis connecting to an extension rod extending downward into the furnace and contacting the top surface of the planar fuel cell stack inside the furnace, a top and a bottom holding plates that are placed on and under the planar fuel cell, respectively, a stationary load placed on the top holding plate, wherein the displacement detection unit has a central axis connecting to the extension rod that passes downward through a bearing and opening into the furnace and pushes against the stationary load, and a data processing unit receiving the output signal from the displacement detection unit to analyze and store the signal; wherein the displacement detection unit uses an elastic unit to push on the extension rod for keeping a downward force to enable the extension rod firm contacting the top holding plate on the planar fuel cell and maintain downward elasticity during displacement measurement; and wherein two ends of the extension rod are semi-spherical to ease central alignment, reduce friction and transfer the downward force from the extension rod to the top holding plate on the planar fuel cell vertical during detection of height displacement of the planar fuel cell.