3D-printed airflow hair sensor inspired by the buthus occitanus scorpion’s flat trichobothria

The adult Buthus occitanus scorpion has an interesting hair-like mechanoreceptor (called trichobothrium), which is flat instead of circular and allows great sensitivity for airflow measurements. The aim of this work is to develop a bioinspired artificial hair-like sensor (AHS) with a similar flat hair shaft using 3D printing. The sensor was successfully manufactured using digital light processing (DLP), a technique that allows multiple sensors to be 3Dprinted sensor in one batch, or arrays of them in a singular structure. The sensor is then sputter-coated with platinum to add piezoresistive capabilities and allow the transduction of airflow velocities into voltage levels. The sensor has been characterized to show a sensing range between 6.8 and 22.3 m/s and an average measurement error