Electrocardiosignal filter method and system
A technology of electrocardiographic signals and signals, which is applied in the field of biomedical engineering, can solve the problems of weakening and weakening the high-frequency part of useful signals, affecting the diagnosis of electrocardiographic signals, etc., and achieve the effect of removing electromyographic noise and filtering effect
Inactive Publication Date: 2015-06-17
SHENZHEN ECGMAC MEDICAL ELECTRONICS
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Problems solved by technology
At present, the finite impulse response (FIR) filtering method with fixed bandwidth is mostly used to filter out myoelectric noise. Although this method is relatively simple, it will weaken the high-frequency part of useful signals while filtering out myoelectric noise, especially This attenuation will be more pronounced for the QRS complex with a higher frequency in the ECG signal
This affects the medical diagnosis of the ECG signal, and if a computer is used for automatic diagnosis, the impact will be even greater
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0049] figure 1 It is a schematic diagram of the overall structure of the ECG signal filtering system according to an embodiment of the present invention. Such as figure 1 As shown, the ECG signal filtering system of the present invention includes: input device 1, A / D converter 2, noise removal module 3, output device 4; wherein noise removal module 3 includes delay module 31, filter module 32, slope detection Module 33 , broadband control module 34 .
[0050] Wherein, input device 1 is used for receiving the analog electrocardiogram signal that gathers; A / D converter 2 is connected with input d...
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The invention provides an electrocardiosignal filter method and system. High fidelity on an electrocardiosignal under myoelectricity filtering is achieved, and the defect that useful signals can be weakened by existing myoelectricity filtering is overcome. QRS complex wave locating is carried out on the electrocardiosignal, then the signal is filtered through a bandwidth-adjustable FIR filter, the high frequency bandwidth is adopted on a QRS complex wave, it is guaranteed that the QRS complex wave can pass through the filter with high fidelity, the small bandwidth is adopted on other low-frequency portions, and the good myoelectricity noise filtering out effect is achieved.
Description
technical field [0001] The invention relates to the technical field of biomedical engineering, in particular to a method and system for filtering electrocardiographic signals. Background technique [0002] The ECG signal contains a lot of noise after collection, including high-frequency noise that affects the signal quality, that is, myoelectric noise. At present, the finite impulse response (FIR) filtering method with fixed bandwidth is mostly used to filter out myoelectric noise. Although this method is relatively simple, it will weaken the high-frequency part of useful signals while filtering out myoelectric noise, especially This attenuation will be more pronounced for the QRS complex with a higher frequency in the ECG signal. This affects the medical diagnosis of electrocardiographic signals. If a computer is used for automatic diagnosis, the impact will be even greater. Contents of the invention [0003] The purpose of the present invention is to overcome the defic...
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Login to View More IPC IPC(8): A61B5/0402
CPCA61B5/7203A61B5/318
Inventor 马亚全
Owner SHENZHEN ECGMAC MEDICAL ELECTRONICS