Design and Application Research of Bionic Mechanical Finger

We designed and manufactured a bionic mechanical finger made of aluminum as the skeleton. Its front end was equipped with a piezoelectric ceramic sheet as a pressure sensor, and then the whole finger was covered with silicone and made into a similar shape as a human finger. The elasticity of the silicone makes it smooth to avoid damage to objects or discomfort to the human body in applications. The stepping motor was used to control the finger to grasp the object. When the fingertip touches the object, the pressure sensor generates a feedback signal to the controller and calculates, integrates, and analyzes the measured value. When the value exceeds, the stepper motor stops rotating, and the bionic finger is positioned to clamp the object. In this study, ANSYS Workbench software was used to simulate the pressure test of various parts of the silicone-coated mechanical finger. Compared with the actual pressing experiment, the designed bionic finger in this study was successfully applied to fragile objects.