A new model of pneumatic muscle and an active type of assistive equipment incorporating this pneumatic muscle has been developed at Hiroshima University and Daiya Industry Co. Ltd., Japan. This wearable equipment, called the Unplugged Powered Suit (UPS), supports human movement without requiring any electronic devices and tanks because it employs a newly developed pneumatic muscle named Pneumatic Gel Muscle (PGM) as an actuator. The UPS improves the quality of life of not only elderly individuals but also healthy people who enjoy sports activities. The UPS will be displayed at the International Robot Exhibition 2015 in December.
To prevent injury and accidents by aging and muscle fatigue, it is important to provide with safe and easy-to-use assist devices. In traditional assistive equipment, compressors and tanks are necessary to exert sufficient power for supporting human motion. It is also expensive to maintain an assist device.
The UPS consists of three parts: PGM (drive part), pump (air pressure for flexing artificial muscle), and pipework (transmission). PGM is characterized as light and flexible, and can exert supportive power by low air pressure. The pump is equipped in the sole, and thus the driving force can be transmitted to PGM by using the human body weight. Overall, the UPS has a very simple structure, is easy to maintain, and is inexpensive.
“For example, PGM covers the articulatio coxae and the pump is equipped on the contralateral sole. This arrangement makes it possible to support human hip movement in the swing phase,” said Associate Professor Yuichi Kurita at Hiroshima University.
There are two examples of UPS application. One is to decrease muscle activity during jogging, and the other is to increase the pitch speed. To decrease muscle activation during jogging, PGM in the UPS is equipped along the musculus soleus and the pump is equipped on the ipsilateral toe. To increase the pitch speed, PGM in the UPS is equipped along the greater pectoral muscle and the pump is equipped on the contralateral toe.
“The UPS is designed to support human motion where and when needed. It also does not contain any heavy devices. This means that we can customize the UPS to the user’s particular needs such as muscle strength for athletes and rehabilitation. In the future, we can develop smarter assistive suits including wearable actuators and sensors by using our technique,” said Dr. Kurita.
The Latest on: Assistive equipment
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The Latest on: Assistive equipment
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