Sensors 2018, 18(1), 231; https://doi.org/10.3390/s18010231
Electrical Design and Evaluation of Asynchronous Serial Bus Communication Network of 48 Sensor Platform LSIs with Single-Ended I/O for Integrated MEMS-LSI Sensors
Chenzhong Shao 1,*
, Shuji Tanaka 1,2, Takahiro Nakayama 3, Yoshiyuki Hata 4 and Masanori Muroyama 2
1
Department of Robotics, Tohoku University, Miyagi 980-8579, Japan
2
Microsystem Integration Center, Tohoku University, Miyagi 980-8579, Japan
3
Partner Robot Div., Toyota Motor Corporation, Toyota, Aichi 470-0309, Japan
4
System & Electronics Engineering Dept. III, Toyota Central R&D Labs., Inc., Nagakute, Aichi 480-1192, Japan
*
Author to whom correspondence should be addressed.
Received: 28 September 2017 / Revised: 26 December 2017 / Accepted: 11 January 2018 / Published: 15 January 2018
(This article belongs to the Special Issue Internet of Things and Ubiquitous Sensing)
Abstract
For installing many sensors in a limited space with a limited computing resource, the digitization of the sensor output at the site of sensation has advantages such as a small amount of wiring, low signal interference and high scalability. For this purpose, we have developed a dedicated Complementary Metal-Oxide-Semiconductor (CMOS) Large-Scale Integration (LSI) (referred to as “sensor platform LSI”) for bus-networked Micro-Electro-Mechanical-Systems (MEMS)-LSI integrated sensors. In this LSI, collision avoidance, adaptation and event-driven functions are simply implemented to relieve data collision and congestion in asynchronous serial bus communication. In this study, we developed a network system with 48 sensor platform LSIs based on Printed Circuit Board (PCB) in a backbone bus topology with the bus length being 2.4 m. We evaluated the serial communication performance when 48 LSIs operated simultaneously with the adaptation function. The number of data packets received from each LSI was almost identical, and the average sampling frequency of 384 capacitance channels (eight for each LSI) was 73.66 Hz. View Full-TextKeywords:
robot tactile sense; dedicated CMOS-LSI; LSI network system; data collision avoidance; backbone bus topology; single-ended signaling
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Shao, C.; Tanaka, S.; Nakayama, T.; Hata, Y.; Muroyama, M. Electrical Design and Evaluation of Asynchronous Serial Bus Communication Network of 48 Sensor Platform LSIs with Single-Ended I/O for Integrated MEMS-LSI Sensors. Sensors 2018, 18, 231.
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