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Computer built-in signal amplifier and audio card multichannel bio-signal sampling system

A signal amplifier and biological signal technology, which is applied in the directions of sensors, medical science, diagnostic recording/measurement, etc., can solve the problems of low data acquisition accuracy, sound card failure, analog-to-digital conversion, etc., and achieve high data acquisition accuracy and reduce Electromagnetic interference, low cost effect

Inactive Publication Date: 2010-03-31
DONGGUAN MATHEMATICAL ENG ACAD OF CHINESE MEDICINE GUANGZHOU UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the biological signal is very weak, some of the signals are at the millivolt level, some are at the microvolt level, or even below the microvolt level. During the process of collecting and amplifying the biological signal, it is easily interfered by the external electromagnetic field, which directly leads to subsequent The sound card cannot perform effective analog-to-digital conversion; when the existing data acquisition system based on the sound card is used to collect biological signals, the error is large and the accuracy of data collection is low

Method used

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  • Computer built-in signal amplifier and audio card multichannel bio-signal sampling system
  • Computer built-in signal amplifier and audio card multichannel bio-signal sampling system
  • Computer built-in signal amplifier and audio card multichannel bio-signal sampling system

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Embodiment 1

[0015] The system for collecting multiple biological signals with a built-in computer signal amplifier and a sound card in this embodiment includes multiple sensors for collecting biological signals, multiple signal amplifiers for amplifying biological signals, and a device for processing the amplified signals of the signal amplifiers. A time division multiplexing unit, a first optocoupler for sending the multiplexed signal to a sound card, a sound card for analog-to-digital conversion of the multiplexed signal, a first optocoupler for sending a control signal to the time division multiplexing unit Two optocouplers, a third optocoupler for sending control signals to the signal amplifier, and a processor for controlling the operation of the acquisition system; the signal amplifier and the time-division multiplexing unit are placed in the shield, and the sensor is connected to the signal amplifier , the signal amplifier is connected to the time-division multiplexing unit, the tim...

Embodiment 2

[0021] This embodiment introduces a specific application example. refer to figure 1 . A sensor 11 , a signal amplifier 12 , a time division multiplexing unit 13 , a first photocoupler 14 , a second photocoupler 15 and a third photocoupler 16 are added to the existing computer host. In addition to the above components, the system also includes a sound card 17 , a memory 18 , a processor 19 , an input device 20 , and an output device 22 . Wherein the number of sensors 11 and signal amplifiers 12 are both 12. The data input port of sound card 17 is connected with the first optocoupler 14, and the second optocoupler 15 and the third optocoupler 16 can be connected with the mainboard by mainboard slots such as ISA or PCI or mainboard input / output (I / O) interfaces. connect.

[0022] refer to figure 2 . The signal amplifier 12 and the time division multiplexing unit 13 are placed in the shielding case 23 , and the shielding case 23 and three photocouplers are welded on a circu...

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PUM

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Abstract

The invention relates to the technical field of bio-signal sampling, in particular to a computer built-in signal amplifier and audio card multichannel bio-signal sampling system. The system comprisesa sensor used for sampling bio-signal, a signal amplifier used for amplifying bio-signal, a time division multichannel multiplex unit used for processing the amplifying signal of the signal amplifier,a first photocoupler used for sending the multiplex signal to a sound card, the sound card used for performing analog-to-digital conversion to the multiplex signal, a second photocoupler used for sending control signal to TDMA multiplex unit, a third photocoupler used for sending control signal to the signal amplifier and a processor used for controlling the operation of the sampling system, wherein the signal amplifier and TDMA multiplex unit are placed in a shielding cover. The system of the invention has low cost, small error and high data acquisition accuracy.

Description

technical field [0001] The invention relates to the technical field of biological signal collection, in particular to a system for collecting multiple biological signals with a built-in computer signal amplifier and a sound card. Background technique [0002] Biological organs or tissues can spontaneously produce in vivo or be stimulated by an external energy to produce a variety of biological signals of different energies, including brain electricity, electrocardiogram, heart sound, breath sound, blood vessel pressure, body heat, body odor and other sound and light , electrical, magnetic physical and chemical energy signals. Biological signals reflect the functional status of organisms, including physiological or pathological states. [0003] Existing data acquisition systems based on sound cards include input interface circuits, timing generation circuits, time-division multiplexing circuits, double-sideband production circuits, output interface circuits and self-calibrat...

Claims

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Application Information

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IPC IPC(8): A61B5/00
Inventor 梁志伟陆妍灵蔡立民阮永队张新云王永运赖小平
Owner DONGGUAN MATHEMATICAL ENG ACAD OF CHINESE MEDICINE GUANGZHOU UNIV OF CHINESE MEDICINE
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