Surface electromyograph, surface electromyography module and measuring method
A measurement module and measurement method technology, applied in the field of medical equipment, to achieve the effect of convenient digital isolation, high precision, and small size
Active Publication Date: 2012-05-23
TSINGHUA UNIV
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Problems solved by technology
[0003]Traditional needle-type electromyography measurement instruments need to stick needles on the human body for measurement, which is inconvenient
In the field of electromyographic signal amplifiers, the existing biological signal amplifiers need to use analog power frequency notch filters and high-priced analog isolation amplifiers, which have the disadvantages of large size, high price, and high power consumption, and their portable applications are limited.
Existing electromyographic measuring instruments often use external power supply to only record electromyographic signals, and do not pay attention to the time when electromyographic signals occur
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[0037] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0038] figure 1 The schematic diagram of the surface electromyography measuring instrument shown includes a 2.4V / 3V power supply 301, and two 1.2V rechargeable batteries or two 1.5V dry batteries can be used to convert the 2.4V / 3V voltage to 3.3V, as the voltage required for the microcontroller to work; the other end output of the 3.3V voltage can be converted into a 3V standard voltage with an accuracy of 0.01% by the 3V reference voltage circuit 303, and used as the analog-to-digital converter 311 samples the reference voltage (the analog-to-digital converter can be integrated in the microcontroller); the preamplifier 305 adopts a digitally programmable op-amp AD8231 chip, and four groups of preamplifiers 305 are arranged in the present embodiment. 10Hz high-pass filter 306 and main amplifier 307, the four preamplifiers 305 ...
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The invention discloses a surface electromyograph, a measuring box, a surface electromyography module and a measuring method, mainly designed aiming at the defects that a traditional electromyography has low accuracy and high power consumption and can not record the generating time of a myoelectric signal. The surface electromyography comprises a power supply module, a reference voltage module, surface myoelectric electrodes, a surface electromyography module, a storage medium and a clock module, wherein the surface electromyography module is formed by sequentially connecting a preamplifier, high-pass filters, main amplifiers, an analog-to-digital converter and a microcontroller, the signal input end of the preamplifier is connected with the surface myoelectric electrodes, the microcontroller is provided with a storage control unit, one input end of the storage control unit is connected with the output end of the analog-to-digital converter, the other input end of the storage control unit is connected with the clock output end of the clock module, and one output end of the storage control unit is connected with the storage medium. The invention adopting the technical scheme has high accuracy, low noise and low power consumption and can simultaneously store the myoelectric signal and the corresponding time thereof.
Description
technical field [0001] The invention relates to the field of medical devices, in particular to a surface electromyography measuring instrument, a surface electromyography measuring module and a measuring method. Background technique [0002] Myoelectricity is the source of electrical signals that generate muscle force. It is the superposition of action potentials of multiple motor units in muscles in time and space, reflecting the functional status of nerves and muscles. In recent years, electromyography has been widely used in basic medical research, clinical diagnosis, rehabilitation engineering, sports medicine, ergonomics and sports biomechanics and other fields. [0003] The traditional needle-type electromyography measurement instrument needs to stick a needle on the human body for measurement, which is inconvenient. In the field of EMG signal amplifiers, the existing biological signal amplifiers need to use analog power frequency notch filters and high-priced analog...
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IPC IPC(8): A61B5/0488A61B19/00
Inventor李路明胡春华郝红伟马伯志王伟明
OwnerTSINGHUA UNIV