Digital completely isolated myoelectric signal amplifying and noise reducing method and device

A technology of digital signals and EMG signals, applied in the fields of electrical digital data processing, medical science, instruments, etc., can solve the problem that EMG signal diagnostic instruments cannot enter the homes of ordinary people, and reduce the area of ​​printed circuit boards and power consumption. Low, lower cost and power consumption effect

Inactive Publication Date: 2010-05-12
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is an important reason why electromyographic signal diagnostic equipment cannot enter the homes of ordinary people.

Method used

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  • Digital completely isolated myoelectric signal amplifying and noise reducing method and device
  • Digital completely isolated myoelectric signal amplifying and noise reducing method and device
  • Digital completely isolated myoelectric signal amplifying and noise reducing method and device

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Embodiment 1

[0034] Such as Figure 8 , 9 As shown, a digital fully isolated myoelectric signal amplification and noise reduction method comprises the following steps:

[0035] The first step: signal collection and amplification: After the weak myoelectric signal is collected, it is amplified by the amplifier to obtain the amplified myoelectric signal;

[0036] The second step: digital processing: including analog-to-digital conversion and digital filtering processing; digitally process the amplified noise-containing myoelectric signal, first perform analog-to-digital conversion, and then obtain digital data after low-pass filtering and adaptive notch processing The obtained digital signal is sent out for isolation; the digital processing is realized by a digital signal processor, and the digital processing includes analog-to-digital conversion, digital filter processing and digital processing result transmission, including the following steps (see Figure 9 ):

[0037] a) After the dig...

Embodiment 2

[0044] A device for realizing a digital fully isolated electromyographic signal amplification and noise reduction method, comprising: a bioelectrical signal pickup 1, a digital signal processor 2, a digital isolation optocoupler 3, and a digital output interface circuit 4, and the electromyographic signal is captured The bioelectrical signal pick-up 1 is collected and amplified by the bioelectrical signal pick-up 1 and output to the AD conversion input terminal of the digital signal processor 2, see Figure 4 , bioelectrical signal pickup 1 consists of a new low-power instrumentation amplifier AD623 to form a differential signal pickup circuit, which is responsible for picking up differential bioelectrical signals; a precision amplifier with low power consumption, low offset voltage, and low bias current AD8610 is used to form the main circuit. Amplification level;

[0045] The digital signal processor 2 includes an analog-to-digital conversion module and a digital signal filt...

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Abstract

The present invention discloses digital completely isolated myoelectric signal amplifying and noise reducing method and device. The acquired myoelectric signal is processed through amplifying, A / D conversion, low-pass filtering, adaptive wave trapping treatment and isolating to obtain the amplified and noise reduced digital signal. The device for myoelectric signal amplifying and noise reducing includes a bioelectric signal pick-up, a digital signal processor, a digital isolating photocoupler, and a digital output interface circuit. The present invention has the advantages of high safety, highS / N ratio, low power consumption, low cost, easy taking, etc.

Description

technical field [0001] The invention relates to a digital fully isolated myoelectric signal amplification and noise reduction method and its device using a new type of digital signal processor (DSP) to reduce the noise of the myoelectric signal and improve the signal-to-noise ratio under the portable condition of low power consumption and small volume , belonging to the field of medical instrument manufacturing. Background technique [0002] In recent years, people pay more and more attention to their own health, and the demand for various medical diagnosis and treatment instruments is increasing day by day. There are a wide variety and an astonishing number of various instruments and equipment on the market. In the field of electromyographic signal amplifiers, most manufacturers use existing public bioelectric signal amplifiers. Such an amplifier requires the use of an analog power frequency notch filter and an expensive analog isolation amplifier. The high-performance e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0488G06F13/00
CPCY02B60/1228Y02D10/00
Inventor 宋爱国何乐生徐宝国王爱民
Owner SOUTHEAST UNIV
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