A proportional pattern recognition control scheme for wearable a-mode ultrasound sensing

Xingchen Yang, Jipeng Yan, Zhenfeng Chen, Han Ding, Honghai Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

390 Downloads (Pure)


It is evident that the prevailing solution, myoelectric pattern recognition for prosthetic manipulation, constrains gesture-based interaction because of the lack of proportional control information such as exerted force. This paper reports an attempt, named simultaneous gesture recognition and muscle contraction force estimation, to realize proportional pattern recognition (PPR) control taking advantage of arm muscle deformation via wearable ultrasound sensing. We experiment with eight types of predefined hand motions, with a range of 0-60% maximum voluntary contraction (MVC) using a wearable multichannel A-mode ultrasound system. The experiment result demonstrates that above 93.7% of gestures are correctly recognized during dynamic muscle contraction forces (0-60% MVC), albeit only training at a slight force level (<6% MVC). Besides, the adopted nonparametric Gaussian process regression estimates the muscle contraction forces accurately and synchronously, with average coefficient of determination, bf Rbf2, and normalized root-mean-square error (nRMSE) of 0.927 and 0.102, respectively. These research outcomes demonstrate the feasibility of ultrasound-based PPR control, paving the way for musculature-driven applications such as finer prosthetic control, remote manipulation, and rehabilitation treatment.

Original languageEnglish
Article number8654210
Pages (from-to)800-808
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number1
Early online date27 Feb 2019
Publication statusPublished - 1 Jan 2020


  • Force estimation
  • gesture recognition
  • graded force control
  • wearable ultrasound sensing


Dive into the research topics of 'A proportional pattern recognition control scheme for wearable a-mode ultrasound sensing'. Together they form a unique fingerprint.

Cite this