Flexible and Slim Device Switching Air Blowing and Suction by a Single Airflow Control

Abstract

This study proposes a soft robotic device with a slim and flexible body that switches between air blowing and suction with a single airflow control. Suction is achieved by jet flow entraining surrounding air, and blowing is achieved by blocking and reversing jet flow. The thin and flexible flap gate enables the switching. Air flow is blocked while the gate is closed and passes through while the gate is open. The opening and closing of the flap gate are controlled by the expansion of the inflatable chambers installed near the gate. The extent of expansion is determined by the upstream static pressure. Therefore, the gate can be controlled by the input airflow rate. The dimensions of the flap gate are introduced as a design parameter, and we show that the parameter contributes to the blowing and suction capacities. We also experimentally demonstrate that the proposed device is available for a variable friction system and an end effector for picking up a thin object covered with dust. Index Terms-Soft robot materials and design, hydraulic/pneumatic actuators.

Development of a Flexible Thin Wearable Device for Tuning Temperature, Humidity, and Surface Friction on Its Surface

“…The temperature and humidity within the acrylic box were controlled using an air conditioner and humidifier, as shown in the figure. near the contact area, thereby reducing the actual contact area and friction [33]. 2.…”

“…The injection of a liquid with a large surface tension onto the contact area increases the adhesion force [32], which increases friction; when dry air is blown into a cotton bag containing granulated materials, an air pocket or an air-lubricated layer is formed near the contact area, thereby reducing the actual contact area and friction [33].…”