On Skin EMG Sensing

On-Skin EMG Sensing for Smart Robotic Control and Immersive Haptics

Synopsis

This innovation is a closed-loop wearable human–machine interface combining flexible EMG sensing, tactile feedback, and brain–computer interface integration. It enables intuitive robotic control with real-time sensory feedback, offering applications in prosthetics, rehabilitation robotics, exoskeletons, and advanced HMIs.


Opportunity

This technology introduces a closed-loop wearable human–machine interface (HMI) that enables natural robotic control with real-time sensory feedback.

At its core are ultra-sensitive, flexible on-skin electromyography (EMG) sensing arrays that capture comprehensive muscle activity with high fidelity and stability. Unlike conventional EMG systems that rely on a few electrodes and often miss weak signals or suffer from noise, this platform delivers exceptional responsiveness for intuitive and precise robotic hand movement.

The robotic hand is further equipped with high-density tactile sensors, providing force and texture feedback to the user. This bidirectional interface not only enables seamless control of robotic limbs but also creates a more immersive connection with the physical environment. In parallel, an EEG module with preparation-free gel materials is under development to integrate brain–computer interface (BCI) functions, further extending the system’s capabilities.

Designed for next-generation prosthetics, rehabilitation robotics, assistive exoskeletons, and advanced HMIs, this technology offers a comprehensive platform for restoring and enhancing motor function. The team is actively seeking collaboration with medical device manufacturers (prosthetics, rehabilitation robotics, wearable sensors), rehabilitation centres and hospitals (for clinical test-bedding), deep-tech companies specialising in AI, data analytics, or biosignal processing, as well as robotics firms to co-develop and deploy this innovation in real-world applications.

 

Technology

This system combines materials science, electrophysiology, and robotics innovations to create a robust, skin-integrated platform:

Ultra-sensitive EMG Sensing

  • Conductive gel with ultra-low skin–electrode impedance

  • Detects EMG signals as low as 1.5% Maximum Voluntary Contraction (MVC)

  • 32–64 channel high-density sensor arrays

  • Stretchable, conformable design with excellent motion artefact resistance

Robotic Tactile Sensor Arrays

  • 1,000 distributed sensors across the robotic hand

  • Sensitivity: 0.01 N, with shear force detection

  • Proven durability: >100,000 cycles

EEG Module (in development)

  • Preparation-free electrode system

  • Thermally responsive phase-change materials

  • Delivers high-quality, stable EEG signals for brain–computer interface integration

Together, these features deliver a closed-loop system that supports multi-channel EMG-driven control with robotic tactile feedback, enabling real-time, natural, and immersive human–robot interaction

 

Applications & Advantages

This technology can be applied across prosthetics, rehabilitation robotics, assistive exoskeletons, and advanced human–machine interfaces (HMIs). It enables the commercialisation of:

  • EMG-Controlled Prosthetic Limbs
    Delivering intuitive, high-resolution muscle signal decoding for natural prosthetic control.

  • Robotic Rehabilitation Devices
    Adapting therapy in real time through continuous monitoring of muscle activity.

  • Assistive Exoskeletons
    Supporting mobility with muscle-driven, responsive control for users with motor impairments.

  • Robotic Hands with Tactile Feedback
    Providing force and texture sensing to enhance dexterity and object interaction.

  • Mulltimodal HMIs
    Combining EMG and EEG inputs for gesture-based and brain–computer interface applications.

  • Wearable Biosignal Platforms
    Extending use to clinical diagnostics, tele-rehabilitation, and immersive VR/AR systems

Inventor

Prof CHEN Xiaodong