No one enjoys going to the dentist.
To help future dentists and dental assistants anticipate the reactions of young children during treatments the robotics company Tmsuk developed a humanoid robot with Festo piezo valve technology that realistically simulates human behaviour, mimicking everything dental professionals might encounter, including fidgeting, squirming, flinching, even clenching of teeth.
Preparing student practitioners on a simulation robot helps them manage such situations compassionately.
“We would not have been able to realize this humanoid robot without Festo’s piezo technology,” says Yusuke Ishii, director of Tmsuk.
Tmsuk specializes in service robots, such as transport robots and personal care assistants for elderly people, and are equipped with electric axes.
However, the dental simulation robot, named Pedia Roid, is pneumatically actuated, since the students and trainees sometimes have to hold the robotic dummy’s limbs during treatment simulations. This could damage the gear unit and spindles of electric drives. Pneumatics are more robust and flexible.
The Pedia_Roid is 110 cm tall and weighs 23 kg, a typical representation of a five-year-old. Its smooth, lifelike movements are produced using Festo proportional pressure regulators with piezo technology.
Such realistic movement is only possible with piezo technology, and specifically the proportional pressure regulators VEAA and VEAB used in this project.
The Pedia Roid’s smooth, lifelike movements are produced using Festo proportional pressure regulators. Such realistic movement is only possible with piezo technology, and specifically the proportional pressure regulators VEAA and VEAB used in this project.
They control most of the robot’s 24 pneumatic cylinders that move arms, legs and fingers as well as the mouth, eyelids and irises. The proportional pressure regulators do not make any clicking sounds when they switch, since the bender actuator moves freely and without any impact noises.
The proportional pressure regulators VEAA/VEAB are 3/3-way valves, each of which combines a pressure sensor and electronic controls. Proportional valves with piezo technology require virtually no energy to maintain an active state thanks to their capacitive capability. Each valve operates like a capacitor: it needs energy only to charge the piezo ceramics; no further energy is needed to maintain that state.
As a result, the valves do not heat up and consume up to 95 per cent less energy than solenoid valves, which require an uninterrupted electrical current to function.
The design of Festo’s VEAA/VEAB valves makes them resistant to wear for a high cycle lifespan. They are ideal for pressure regulation in cylinders for low to very low air consumption applications, and as well as applications requiring a high dynamic response, such as the Pedia_Roid robot. The compact design of these proportional valves combines space-saving installation with a low intrinsic weight.
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