Dual-axis piezoresistive microelectromechanical systems (MEMS) force sensors were used to investigate the effects of orientation angle on the adhesion of gecko hairs, called setae. These hairs are part of a fantastic, robust dry adhesive. Their adhesion is highly angle-dependent, with both the qpitchq and qrollq orientation angles playing a role. This anisotropy in adhesion properties is critical for locomotion, as it enables detachment of the gecko's foot with limited pull-off force. Many synthetic mimics of the gecko adhesive are isotropic. This work on the anisotropy of natural setae will inform future work on synthetic dry adhesives.The actual position of the stage was monitored using capac- itive position sensors (E-509. ... conditioning circuit The signal conditioning circuit for each sensor contained a Wheatstone bridge, as shown in the circuit diagram in Figure 3.2.
|Title||:||Dual-axis MEMS Force Sensors for Gecko Adhesion Studies|
|Publisher||:||ProQuest - 2009|