SIGNAL ACQUISITION DEVICE, SIGNAL ACQUISITION METHOD AND WEARABLE APPARATUS
First Claim
1. A signal acquisition device comprising:
- a preamplifier circuit configured to amplify an obtained surface electromyography (sEMG) signal to produce an amplified sEMG signal;
a baseline drift suppression circuit comprising a low-frequency component extraction module and a subtraction module, wherein the low-frequency component extraction module is configured to extract a first low-frequency component from the amplified sEMG signal, and wherein the subtraction module is configured to perform subtraction processing between the amplified sEMG signal and the first low-frequency component to obtain a difference signal; and
a filter circuit configured to filter the difference signal to obtain a target acquisition signal.
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Abstract
The present disclosure relates to a signal acquisition device, a signal acquisition method and a wearable apparatus. A preamplifier circuit in the signal acquisition device amplifies an obtained sEMG signal to produce an amplified sEMG signal. A baseline drift suppression circuit in the signal acquisition device extracts a first low-frequency component from the amplified sEMG signal and performs subtraction processing between the amplified sEMG signal and the first low-frequency component to obtain a difference signal. A filter circuit in the signal acquisition device filters the difference signal to obtain a target acquisition signal. With introduction of baseline drift suppression in the signal acquisition circuit, the baseline drift caused by a low-frequency component in a sEMG signal is eliminated, and the stability of a target acquisition signal is enhanced.
6 Citations
20 Claims
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1. A signal acquisition device comprising:
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a preamplifier circuit configured to amplify an obtained surface electromyography (sEMG) signal to produce an amplified sEMG signal; a baseline drift suppression circuit comprising a low-frequency component extraction module and a subtraction module, wherein the low-frequency component extraction module is configured to extract a first low-frequency component from the amplified sEMG signal, and wherein the subtraction module is configured to perform subtraction processing between the amplified sEMG signal and the first low-frequency component to obtain a difference signal; and a filter circuit configured to filter the difference signal to obtain a target acquisition signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification