A Low-Power, Single-Chip Electronic Skin Interface for Prosthetic Applications
| Autor: | Samuel J. Murray, Samuel P. Hansen, Sina Balkir, Joseph A. Schmitz, Michael W. Hoffman, Jonathan M. Sherman |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computer science
Piezoelectric sensor Interface (computing) Biomedical Engineering Electronic skin 02 engineering and technology 01 natural sciences Wearable Electronic Devices Electric Power Supplies 0202 electrical engineering electronic engineering information engineering Humans System on a chip Electrical and Electronic Engineering business.industry 020208 electrical & electronic engineering 010401 analytical chemistry Electrical engineering Signal Processing Computer-Assisted Equipment Design Prostheses and Implants Chip 021001 nanoscience & nanotechnology 0104 chemical sciences Microcontroller CMOS Interfacing 0210 nano-technology business Wireless Technology Energy (signal processing) Computer hardware |
| Zdroj: | ISCAS |
| ISSN: | 1940-9990 |
| Popis: | A low-power, single-chip electronic skin interface is presented. The system on chip (SoC) implementation significantly reduces the physical footprint and power requirements compared to commercial interfaces, which enables the creation nimble prosthetic limbs. Its small size and reduced battery requirements are ideal for advanced prosthetics that utilize electronic skin to provide their user tactile feedback. The architecture consists of multiple charge-sensitive analog front ends (AFEs) interfaced to a central, 16-bit microcontroller core which is capable of processing the sensory information in real time. Event-driven operation allows the chip to monitor all input channels while consuming minimal energy. A test chip has been fabricated in a 0.13 $\mu$ m CMOS technology and its functionality demonstrated by interfacing the chip to a prototype electronic skin based on polyvinylidene fluoride (PVDF) piezoelectric sensors. Tactile signals from the sensors are measured and processed on-chip to calculate the corresponding charge. This is accomplished by programming the microcontroller with a custom software algorithm, granting the system the flexibility to interface to different types of sensors. The single-chip electronic skin system consumes 7.0 ${\mu {\rm W}}$ per channel and 93.5 ${\mu {\rm W}}$ in the example application when stimulated at 1 Hz, making it suitable for use with battery-powered prosthetics. |
| Databáze: | OpenAIRE |
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