QNET Myoelectric Board

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Introduce Students to Biomedical Engineering

The QNET Myoelectric Trainer is ideally suited to teach and demonstrate the fundamentals of processing electromyographic signals. Developed exclusively for NI ELVIS platform and LabVIEW™ software, the system is an exciting way to introduce students to biomedical engineering. Students can use a variety of filtering and control methods to control a servo from the contraction of muscles, applying the principles of electromyography. Students learn how to:

  • analyze the electromyogram signal
  • condition the signal
  • develop task-based servo control from processed electromyogram

How It Works

The QNET Myoelectric Trainer includes a two-electrode electromyograph with a grounding strap and a servo. The on-board processed EMG signal can be measured and the servo can be driven by the PWM.

Through EMG signal processing and control, the clamp on the servo can be opened and closed through muscle contraction, similarly to myoelectric prosthesis. An optical isolation amplifier is used to amplify the electromyogram signal measured by the EMG electrode, remove noise, and isolate the power source from the user.

Comprehensive Resources and ABET-aligned Courseware Included

The QNET Myoelectric Trainer comes with comprehensive digital resources developed by Quanser to enhance teaching controls, saving professors’ time while helping students quickly grasp the capabilities of the trainer, relate the studied control concepts to applications in real world and understand the exercises performed in lab. The resources include:

  • a collection of instructional videos covering experiment setup, curriculum structure, real-life applications and basic operations in LabVIEW
  • ABET-aligned courseware with detailed assessment guidelines
  • setup materials, including Quick Start Guides, User Manual and VIs for the trainer ensure faster, easier setup of the experiment
  • pre-designed VIs help students understand how the theoretical block diagrams relates to the actual implementation
  • additional lecture materials, including Powerpoint slides professors can use to introduce the labs in their lectures
  • additional materials such as Practical Control Guide can help students grasp the fundamental control concepts taught

  • Electromyograph powered by two AA batteries, with opto-isolated electrode and a grounding strap
  • Pulse-width controlled metal gear servo
  • On-board signal conditioning circuit and PWM
  • Can monitor electromyogram signal at different stages in circuit
  • Plug-and-play design for quick and easy lab setup
  • Compact
  • Protective cover to shield the circuitry
  • Comprehensive digital resources and ABET-aligned courseware included
  • Fully compatible with LabVIEW™
  • Fully documented system models and parameters provided for LabVIEW™
Servo motor operating range   4.8 – 6 V
Servo motor stall torque 3 kg.cm
Isolation amplifier recommended input voltage ± 0.2 V
Isolation amplifier output voltage range 1.29 – 3.8 V
EMG sensor analog output  ± 5 V
EMG sensor gain 300 Hz
EMG upper cut-off frequency  500 Hz
EMG lower cut-off frequency  25 Hz

Toppics covered in the Quanser-developed courseware

  • Analyzing the electromyogram signal
  • Signal conditioning – FFT, filtering
  • Development of task-based servo control from processed electromyogram
  • Calibration
  • Zero-order hold
  • Integral control
The QNET Myoelectric Trainer can be also used to teach other topics that are not included in the Quanser-developed courseware.

To set up your QNET Myoelectric Trainer, you need NI ELVIS Modular Engineering Education Laboratory Platform.

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