Description

The sensor integrates the filtering and amplification circuit, amplifies the weak human surface muscle electrical signal within a range of

1.5mV, and effectively suppresses the noise (especially the frequency interference) by differential input and analog filter circuit. The output

signal is in the form of analog, with 1.5V as the reference voltage and 0 to 3.0V of the output. The size of the output signal depends on the

amount of activity of the selected muscle, the waveform of the output signal can significantly indicate the condition of the subcutaneous

muscle situator in the observed position, facilitate the analysis and research of myoelectrical signal, detect muscle activity, such as

muscle tightness, strength, fatigue, etc.

The dry electrode electromyography sensor is an active sensor that provides high-quality signal gathering and is easy to use. Whether

used in static or dynamic applications, it takes only some extremely simple preparation. The use of dry electrode guide, no conductive

gel can also get good signal quality, so with long life, simple and convenient to use and So on, more suitable for ordinary users, and

the use of gel probe medical electrode is usually disposable, more troublesome to use.

Brand new upgrade

1. Use dry electrodes without applying conductive gel, long life, simple and convenient to use.

2. Measurements are non-invasive, simple operation and other advantages.

3. Single power supply, low power consumption design.

Usage attention

1. The power supply voltage is between 3.3 and 5.5V, the power supply current is not less than 50mA, and the ripple and other noises should be small. It is recommended to use a regulated DC voltage.

2. The effective spectrum range of the EMG signal is 20Hz~ 500Hz. It is recommended to use an analog-to-digital converter (ADC) with a resolution of not less than 8bit and an effective sampling frequency of not less than 1KHz for sampling and digitization to retain as much original information as possible.

3. Use the matching metal dry electrode plate, and keep the electrode plate consistent with the muscle direction.

4. This product is not a professional medical instrument and cannot be used as an auxiliary accessory to participate in diagnosis and treatment.

About Arduino development kit

Upload the demo code to the arduino dashboard, then open the serial monitor of the arduino IDE and observe the waveform. When the muscles relax, it is a straight line with a value of 0 all the time, as shown in the figure below. It is normal to have a few spikes occasionally.

Parameter

1. About EMG signal processing board

Supply voltage：+3.3V~5.5V

Working voltage: +5.0V

Detection range: +/-1.5mV

Electrode interface: 3.5mm headphone jack

Module interface: Pin header 2.54mm-4P

Board size: 24 * 39 mm

Operating temperature: 0~ 50 ° C

Output range: 0~ 3.0V

2. About EMG detection dry electrode board

Electrode interface: 3.5mm headphone jack

Electrode line length: 50cm

Board size: 24 * 32 mm

Board weight: 42g