Signal processing method for borborygmus signal monitoring system

A signal processing and monitoring system technology, applied in the fields of electrical digital data processing, special data processing applications, medical equipment, etc., can solve the problem of long calculation time, no objective identification, comparison and marking of bowel sounds quantitative methods, difficult clinical practice. And other issues

Active Publication Date: 2016-10-12
TSINGHUA UNIV
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Problems solved by technology

[0007] Bayesian algorithm, STFT (short-time Fourier transform) or Wigner-Ville distribution are often used in signal processing and analysis, but the calculation time is long, the space complexity consumption is very large, and it is not suitable for the fast processing and calculation of wearable small hardware. Difficult to a...

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  • Signal processing method for borborygmus signal monitoring system
  • Signal processing method for borborygmus signal monitoring system
  • Signal processing method for borborygmus signal monitoring system

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Embodiment Construction

[0061] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0062] see figure 1 , figure 2 , the signal processing method oriented to the bowel sound signal monitoring system provided by the present invention is characterized in that it includes the following operations:

[0063] 1) The adaptive filter module receives the bowel sound signal x collected by the acoustic-electric sensor n , human body reference noise n b and ambient noise n e , the bowel sound signal x and human body reference noise n are processed by one-stage adaptive filtering b Ambient noise in n e After stripping, the reference noise n of the human body in the bowel sound signal x is processed by two-stage adaptive filtering b Stripping, get the denoised signal y n ;

[0064] 2) The noise reduction signal y in a certain frequency band is measured by the frequency band suppr...

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Abstract

The invention discloses a signal processing method for a borborygmus signal monitoring system. According to the method, after borborygmus data are quantized into digital signals with sampling rate of Fs by a microphone, the digital signals are treated based on the self-adaptive filtering algorithm and sectioned according to window length, the signal frequency spectrum of each signal section is solved by means of the fast Fourier transform algorithm, the signal frequency spectra are firstly applied to intensity detection, then subjected to correlation-based detection and analysis with a median frequency spectrum model within the frequency band to be tested, and finally sent to a comparator to be compared with a reference value, only the signals with correlation coefficients high enough can be shown in a data window as borborygmus signals and presented by the output result 1, and 0 is output otherwise. On this basis, RIM, IMF and AMT are also provided to be used for evaluating the intestinal tract activity condition of a testee. The method is used for the wearable human body borborygmus signal monitoring system and can be implanted in equipment hardware or a monitoring server in hospital, and the position of a borborygmus of the testee can be marked according to borborygmus signals input into the system, so that technical support is provided for a doctor to offer reasonable postoperative rehabilitation nursing to abdominal surgery patients.

Description

technical field [0001] The invention belongs to the technical field of signal processing of medical monitoring equipment, and relates to a signal processing method for a bowel sound signal monitoring system. Background technique [0002] Bowel sounds reflect the state of human digestive tract activity and provide important clinical reference data for doctors. Whether and when bowel motility returns in patients who have undergone abdominal surgery determines the postoperative care and feeding regimen. However, at this stage, the recovery of the intestinal motility of the patient is detected by judging whether the patient has bowel sounds, and whether to provide the patient with nutrient solution, liquid food or solid food still relies on the subjective experience of the doctor, which is often conservative. estimate. This is not conducive to the chief doctor's immediate teaching guidance for doctors in clinical practice, and it is not conducive to reducing the hospital's ope...

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Application Information

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IPC IPC(8): G06F19/00G06F17/14
CPCG06F17/14G16H40/63
Inventor 尹说姜汉钧杨闻笛张春王志华
Owner TSINGHUA UNIV
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