High-density active flexible electrode array and signal conditioning circuit thereof

Abstract

The invention discloses a high-density active flexible electrode array and a signal conditioning circuit thereof. The signal conditioning circuit comprises the high-density active flexible electrode array and an amplification filter circuit thereof. The electrode array collects skin position surface potentials corresponding to electrodes, and an operational amplifier or an instrumental amplifier arranged on a flexible plate performs impedance transformation or first-stage amplification. The operational amplifier performs impedance transformation on each electrode, and the rear-stage instrumental amplifier performs amplification and filtering on difference values between every two adjacent signals. The instrumental amplifier performs first-stage amplification directly, and performs amplification on difference values between every two adjacent electrode pairs directly. The signal conditioning circuit performs amplification and filtering processing on multichannel surface electromyogram signals output by the electrode array, and outputs multichannel surface electromyogram signals with certain bandwidth and convenient for A / D (analog to digital) conversion. The high-density active flexible electrode array can acquire the skin surface potentials of human bodies, and can acquire the multichannel surface electromyogram signals with high quality and low noise even if in uneven areas.

Description

technical field [0001] The invention relates to a medical diagnosis and scientific development device, in particular to a high-density flexible electrode plate for decomposing surface electromyographic signals and its related amplification and filtering parts. Background technique [0002] Electromyography (Electromyogram, EMG) is the application of electronic instruments to record the electrical activity of muscles at rest or contraction, and the application of electrical stimulation to examine the nerve, muscle excitation and conduction function. The electrical potentials produced by the muscles are measured and recorded with an EMG device, resulting in an EMG that depicts the electrical activity of the muscles. [0003] Compared with the traditional needle electrode EMG, surface electromyography (Surface Electromyogram, sEMG) has the advantages of no pain, no damage, and no infection. Traditional sEMG uses a pair of electrode pairs at the skin position corresponding to e...

AI Technical Summary

Problems solved by technology

In the prior art, flexible electrode arrays made of flexible materials can be made into any desired shape and size, because of their flexibility, flexible electrodes can be used on uneven skin parts, and can be in contact with the skin after special treatment Good contact, for the high-density flexible electrode array connected to the amplifying circuit through the cable, the high-impedance surface electromyography signal transmitted by the cable in practical application is easily interfered by the space electromagnetic field and the power frequency alternating current, thus affecting the final acquired surface electromyography signal quality

However, the active electrode array based on the hard board has an electrode spacing of more than 10 mm, which cannot completely pick up the surface electromyographic signals generated by the superficial muscles, which is not only not conducive to electromyographic decomposition, but also causes problems when measuring in uneven areas. Bringing electrode-skin contact problems, thus affecting the final signal quality and signal measurement accuracy

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