Digital high-resolution torque sensor and signal processing

Chi Ting Yeh, Nan Chyuan Tsai, Hsin Lin Chiu, Chung Yang Sue

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A contactless thin-layered torque sensor with fully digital signal processing circuit is proposed in this paper. The mechanical structure of the torque sensor is an orange-slice-alike flexible body. Two links with black/white stripes are aligned beforehand as no any torque applied to the shaft. The two links play the role of optical grating by resolution. As long as the orange-slice-alike flexible body, sandwiched by the aforesaid links, is subject to an external torque applied, a twisted angle is induced between the two thin photograting discs. Two sets of photodetector cooperate with the two discs with optical gratings to generate two pulse sequences. Therefore, a time delay between these two pulse sequences can be acquired as long as the shaft is twisted by a torque. A counter IC is employed to quantify this time delay in terms of the torque applied, and the time period in terms of rotational speed of shaft. One of the merits of the proposed torque sensor is that real-time measurement on torque applied becomes feasible even if the shaft, subject to external torque, is rotating at high speed. Other advantages of the fully digital signal processing circuit include: 1) no need to conduct analog/digital conversion and 2) free of noise, crosstalk and electromagnetic interference.

Original languageEnglish
Article number6942179
Pages (from-to)2093-2100
Number of pages8
JournalIEEE Sensors Journal
Volume15
Issue number4
DOIs
Publication statusPublished - 2015 Apr 1

Fingerprint

torque
signal processing
Signal processing
Torque
high resolution
sensors
Sensors
flexible bodies
Diffraction gratings
Digital signal processing
Time delay
time lag
gratings
interference
electromagnetic interference
Networks (circuits)
Analog to digital conversion
Signal interference
Crosstalk
Photodetectors

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Yeh, Chi Ting ; Tsai, Nan Chyuan ; Chiu, Hsin Lin ; Sue, Chung Yang. / Digital high-resolution torque sensor and signal processing. In: IEEE Sensors Journal. 2015 ; Vol. 15, No. 4. pp. 2093-2100.
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Digital high-resolution torque sensor and signal processing. / Yeh, Chi Ting; Tsai, Nan Chyuan; Chiu, Hsin Lin; Sue, Chung Yang.

In: IEEE Sensors Journal, Vol. 15, No. 4, 6942179, 01.04.2015, p. 2093-2100.

Research output: Contribution to journalArticle

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