Tutorial 6: Keyboard Emulation

By | Uncategorized | No Comments
The project “Pschyo-physiological training approach to amputee rehabilitation” main aim was to create a human-machine interface using EMG signals for rehab process. We used the processed EMG to act as key stroke for a game application.   EMG detection:- First we will discuss the methods we used to detect EMG...
Read More

Tutorial 5: Sample Based Processing-2

By | Uncategorized | No Comments
In the previous post we discussed about Band-passing EMG signal using SigmaStudio. In the project “Pschyo-physiological training approach to amputee rehabilitation” we used the RMS value of the filtered signal for detect EMG activation. Here we will discuss the algorithm used for EMG detection. RMS calculation The RMS value of...
Read More

Tutorial 3: Sample Based Processing

By | Uncategorized | No Comments
In sample-based processing, blocks process signals one sample at a time. Each element of the input signal represents one sample in a distinct channel. For example in figure 1 from a sample-based processing perspective, the following 3-by-2 matrix contains the first sample in each of six independent channels. Fig 1...
Read More

Blog 2: Rectification Vs. Dc Shifting.

By | Uncategorized | No Comments
All our experiments were performed with reference electrode shorted to ground (0V) of the instrumentation amplifier, hence the acquired raw EMG signal has both negative and positive peaks. Please refer here for more details about raw EMG acquisition. The band passed signal is used as an input to a microcontroller...
Read More

Tutorial 1: Raw EMG Signal Acquisition.

By | Uncategorized | 3 Comments
Raw Electromyography Signals EMG signals generally lie in the range of 20-150 Hz depending on the muscle unit selected and the electrodes – but they are extremely noisy. To reduce this noise, we have used three surface electrodes, namely E1, E2 and E3. E1 and E2 are used to record muscle activity from...
Read More

Blog 1: Mechanical Designs.

By | Uncategorized | No Comments
We have used two mechanical designs for the arm. 1. ChArm's Mechanical design:- For our prototype, string actuated fingers made up of three sections (See figure 1) were used. These sections were composed of Styrofoam affixed to cardboard sheets. Strings guided by thin plastic cylinder sections (attached to the underside...
Read More

Intro- ChArm, An Affordable prosthetic Arm

By | Uncategorized | No Comments
Motivation: Chandan Dhal, an amputee himself, realized that assistive devices are over-priced. He feels that the assistive devices provide amputees with the hope to face the world, and over-pricing them to make profit is unethical and appalling. He believes that as an engineer with the potential know-how and an amputee with an intimate...
Read More