Abstract
This paper demonstrates a ballpoint pen like pressure sensor for endoscopic palpation, which can conduct continuous pressure measurement at different locations while a metal ball on the tip rotates. This device is a capacitive-typed pressure sensor which obtains applying force or pressure data from capacitance changes. PDMS polymer is used for the sensor base and liquid metal is used for electrodes to form them on the cylindrical sides. This device has double cylinder and 4 electrodes on its sides surrounding the ball. These are arranged alternately to form 4 capacitors, which can detect the sizes and directions of the applying force vertically to the axis of the ballpoint pen. The device was fabricated and tested by using Micro Autograph and LCR meter, in which loads were applied to three different directions while the capacitance of the equipped capacitors were measured. As a result, it was observed that the only capacitance ratios of capacitor which was applied force increased and this device was verified to be able to detect the sizes and directions of applied force in all directions.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
