Multi-parameter bioelectric physiological signal collecting device

A collection device and physiological signal technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve the problems of amplifier saturation, bulky, difficult to filter out, etc., to reduce baseline offset, small size, and reduce artificial effect of error

Inactive Publication Date: 2014-08-06
吴正平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the first solution is simple, the system itself will introduce much larger noise than the biological signal, and choose a high gain. The interference signal will saturate the amplifier and it is difficult to filter out
At present, most devices for collecting biological signals are bulky and not easy to carry because each channel contains analog filtering and amplification modules, and there are many channels and high AD conversion accuracy.

Method used

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  • Multi-parameter bioelectric physiological signal collecting device
  • Multi-parameter bioelectric physiological signal collecting device
  • Multi-parameter bioelectric physiological signal collecting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: see figure 1 , a multi-parameter bio-electrophysiological signal acquisition device, the acquisition device includes a front-end Spring active dry electrode, an AD converter, an ARM processor, a communication module, a battery-powered module, and an upper computer waveform display module, and the Spring active The dry electrode is connected to the AD converter, and the AD converter and the ARM processor perform data transmission and exchange, and the ARM processor sends the data to the upper computer waveform display module through the communication module, and the communication module is set to a USB communication module, a serial communication module, At least one of the three modules of the wireless communication module. Generally, the three methods are set at the same time. The three communication methods can be selected according to your own conditions. When measuring ECG signals, you can choose serial communication for data transmission and measure EE...

Embodiment 2

[0033] Example 2: see figure 2 , image 3 , as an improvement of the present invention, the Spring active electrode is set as a finger needle with a spring as a signal introduction device. When in contact with the scalp, the stretching of the spring will reduce the pressure felt by the scalp and ensure that the electrodes are in close contact with the scalp. figure 2 As shown, since there is no need to apply conductive paste, the impedance between the scalp and the electrode is very large, so the input impedance of the post-stage preamplifier must be large enough. The active electrode is to add an active circuit on the basis of the ordinary electrode to increase the current, which is mainly realized by a buffer amplifier with high input impedance and low output impedance. This technical solution chooses low-power precision amplifier TLV2262, the working circuit is as follows image 3 As shown, in order to prevent the interference signal from saturating the amplifier, th...

Embodiment 3

[0034] Example 3: see figure 1 , Figure 4 , as an improvement of the present invention, the ARM processor configures the working mode of the AD converter, receives the data transmitted by the AD converter, and sends the data to the host computer for display through the USB module, serial port module or wireless module, the said The ARM processor is an STM32 processor, a 32-bit processor with a working frequency of 72MHz. Each ADS1298 has 8-channel differential input, which is used to input the bioelectrical signal collected by the front-end electrode. The specific working mode of the chip can be configured by reading and writing registers through the SPI bus, such as: enabling or disabling the acquisition channel, each functional module, such as the right leg drive, Wilson center terminal, internal reference source and crystal oscillator, etc., to configure the acquisition channel Parameters, such as PGA multiplier, sampling frequency, etc., and configure the working mod...

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Abstract

The invention relates to a multi-parameter bioelectric physiological signal collecting device. The multi-parameter bioelectric physiological signal collecting device comprises a front-end Spring active dry electrode, an AD converter, an ARM processor, a communication module, a battery power supply module and an upper computer waveform display module, wherein the Spring active dry electrode is connected with the AD converter, data transmission and exchange are carried out between the AD converter and the ARM processor, and the ARM processor sends data to the upper computer waveform display module through the communication module. According to the technical scheme, the Spring active dry electrode designed independently is adopted, a signal collecting system is composed of the ARM processor and an ADS1298 AD converter, the number of channels is 16, and data transmission adopts three communication modes, namely a USB communication mode, a serial port communication mode and a wireless communication mode. The multi-parameter bioelectric physiological signal collecting device is small in size, high in accuracy and convenient to carry.

Description

technical field [0001] The invention relates to a signal acquisition device, in particular to a multi-parameter biological electrophysiological signal acquisition device, which belongs to the technical field of auxiliary medical equipment. Background technique [0002] Bioelectrical signal acquisition and processing devices are the most widely used in the field of biomedical electronics, and one of the most obvious interdisciplinary and penetration technology hotspots. The theory and methods of engineering technology related to electronics are comprehensively applied to study the structure of the human body from the perspective of engineering science. and function, and the relationship between function and structure. As an interdisciplinary subject, on the one hand, the use of electronics in the fields of biology and medicine has enriched the methods of bioelectrical signal extraction and acquisition, and made the research methods in these fields more precise and scientific;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0476A61B5/0478
Inventor 吴正平马梅方贡旭彬李卫东
Owner 吴正平
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