Development of an LSI for tactile sensor systems on the whole-body of robots

Masanori Muroyama, Mitsutoshi Makihata, Yoshihiro Nakano, Sakae Matsuzaki, Hitoshi Yamada, Ui Yamaguchi, Takahiro Nakayama, Yutaka Nonomura, Motohiro Fujiyoshi, Shuji Tanaka, Masayoshi Esashi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We have developed a network type tactile sensor system, which realizes high-density tactile sensors on the whole-body of nursing and communication robots. The system consists of three kinds of nodes: host, relay and sensor nodes. Roles of the sensor node are to sense forces and, to encode the sensing data and to transmit the encoded data on serial channels by interruption handling. Relay nodes and host deal with a number of the encoded sensing data from the sensor nodes. A sensor node consists of a capacitive MEMS force sensor and a signal processing/transmission LSI. In this paper, details of an LSI for the sensor node are described. We designed experimental sensor node LSI chips by a commercial 0.18μm standard CMOS process. The 0.18μm LSIs were supplied in wafer level for MEMS post-process. The LSI chip area is 2.4mm × 2.4mm, which includes logic, CF converter and memory circuits. The maximum clock frequency of the chip with a large capacitive load is 10MHz. Measured power consumption at 10MHz clock is 2.23mW. Experimental results indicate that size, response time, sensor sensitivity and power consumption are all enough for practical tactile sensor systems.

Original languageEnglish
Pages (from-to)302-309
Number of pages8
JournalIEEJ Transactions on Sensors and Micromachines
Volume131
Issue number8
DOIs
Publication statusPublished - 2011 Nov 1

Keywords

  • Integrated MEMS
  • Interrupt network
  • Sensor network
  • Serial communication
  • Tactile sensor

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering

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