Multi-channel borborygmus wireless monitoring device capable of adaptively eliminating background noise

Abstract

The utility model relates to the technical field of medical equipment, and discloses a multi-channel borborygmus wireless monitoring device capable of adaptively eliminating background noise, which comprises a multi-channel borborygmus and background noise collection module, an adaptive background noise elimination module, a Bluetooth wireless transmission module and a borborygmus automatic evaluation module, the output end of the multi-channel borborygmus and background noise collection module is in signal connection with the input end of the self-adaptive background noise elimination module, and the output end of the self-adaptive background noise elimination module is in signal connection with the input end of the Bluetooth wireless transmission module. And the output end of the Bluetooth wireless transmission module is in signal connection with the input end of the automatic borborygmus evaluation module. According to the method and the device, multi-channel borborygmus output after noise elimination can be realized, so that the performance of subsequent borborygmus analysis or index calculation is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of medical equipment, and in particular relates to a multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise. Background Art

[0002] Bowel sounds are the sound of gas and liquid flowing through the intestinal cavity during intestinal peristalsis, which can reflect the movement state of the intestine and are an important indicator for intestinal function monitoring. Compared with intestinal function monitoring through gastroscopy and colonoscopy, bowel sound auscultation has the characteristics of being non-sensitive, real-time monitoring, and more suitable for monitoring small intestinal function. Normal bowel sounds are 4-5 times / minute, 6-10 times / minute when intestinal peristalsis is enhanced, and bowel sounds can only be heard once every few minutes or disappear completely when intestinal peristalsis is weakened. Therefore, in order to fully obtain bowel sound information, bowel sound auscultation generally lasts longer. Especially for the evaluation of intestinal function recovery of patients in the intensive care unit, long-term and high-quality monitoring of bowel sounds is crucial.

[0003] Traditional stethoscopes or existing electronic stethoscopes require medical staff to operate at a fixed position, which is not suitable for long-term bowel sound monitoring applications. Although there have been some patent applications for bowel sound monitoring in recent years, they have at least one of the following disadvantages:

[0004] (1) It is unable to efficiently and adaptively eliminate the ubiquitous background noise interference in the external environment, which limits subsequent applications;

[0005] (2) Auscultatory signals are often transmitted via wires, which causes many inconveniences in practical use;

[0006] (3) Although there are some multi-channel bowel sound auscultation methods for bowel sound localization, advanced array signal processing technology has not been used to improve the accuracy of bowel sound localization and enhance bowel sounds. Utility Model Content

[0007] The utility model aims to solve the above problems and proposes a multi-channel bowel sound wireless monitoring device which can adaptively eliminate background noise.

[0008] In order to achieve the above purpose, this application adopts the following technical solutions:

[0009] A multi-channel bowel sound wireless monitoring device with adaptive background noise elimination comprises a multi-channel bowel sound and background noise collection module, an adaptive background noise elimination module, a Bluetooth wireless transmission module and a bowel sound automatic evaluation module, wherein the output end of the multi-channel bowel sound and background noise collection module is signal-connected to the input end of the adaptive background noise elimination module, the output end of the adaptive background noise elimination module is signal-connected to the input end of the Bluetooth wireless transmission module, and the output end of the Bluetooth wireless transmission module is signal-connected to the input end of the bowel sound automatic evaluation module.

[0010] Preferably, the multi-channel bowel sound and background noise collection module includes a multi-channel bowel sound collection restraint device, a background noise collection branch and a multi-channel audio synchronous analog-to-digital conversion device.

[0011] Preferably, the multi-channel bowel sound collection restraint belt device is specifically a rubber and lycra cotton blended restraint belt with a certain elasticity, one end of which is a hook and the other end is a leather loop.

[0012] Preferably, the multi-channel bowel sound collection restraint device is inlaid with 7 patch-type MEMS microphones on the front side, wherein 6 microphones are evenly distributed around 1 microphone at the center point.

[0013] Preferably, the background noise collection branch is independent of the multi-channel bowel sound collection restraint device, and collects the background noise through a separate patch-type MEMS microphone.

[0014] Preferably, the automatic bowel sound assessment module includes a bowel sound signal detection submodule, a bowel sound automatic positioning and signal enhancement submodule, and a bowel sound assessment parameter calculation submodule.

[0015] Compared with the prior art, the present application provides a multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise, which has the following beneficial effects:

[0016] 1. The multi-channel bowel sound wireless monitoring device with adaptive background noise elimination can realize the output of multi-channel bowel sound after noise elimination by synchronously collecting multi-channel noisy bowel sounds and background noise signals and using an adaptive noise elimination algorithm, thereby improving the performance of subsequent bowel sound analysis or indicator calculation.

[0017] 2. This multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise transmits the noise-canceled multi-channel bowel sounds via Bluetooth. Not only does wireless transmission provide convenience, but the noise-canceled multi-channel bowel sounds can also be used for more accurate bowel sound positioning and signal enhancement.

[0018] 3. This multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise uses advanced array signal processing technology for the first time for the multi-channel bowel sound signals after noise elimination - a multiple signal classification algorithm to improve the accuracy of bowel sound positioning and uses a spatial domain filter to enhance the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall framework diagram of a multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise proposed in this application;

[0020] Figure 2 This is a structural schematic diagram of a multi-channel bowel sound and background noise collection module of a multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise proposed in this application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0022] Reference Figure 1-2 A multi-channel bowel sound wireless monitoring device with adaptive background noise elimination includes a multi-channel bowel sound and background noise collection module, an adaptive background noise elimination module, a Bluetooth wireless transmission module and a bowel sound automatic evaluation module, wherein the output end of the multi-channel bowel sound and background noise collection module is signal-connected to the input end of the adaptive background noise elimination module, the output end of the adaptive background noise elimination module is signal-connected to the input end of the Bluetooth wireless transmission module, and the output end of the Bluetooth wireless transmission module is signal-connected to the input end of the bowel sound automatic evaluation module.

[0023] The multi-channel bowel sound and background noise collection module includes a multi-channel bowel sound collection restraint device, a background noise collection branch and a multi-channel audio synchronous analog-to-digital conversion device.

[0024] The multi-channel bowel sound collection restraint device is specifically a rubber and lycra cotton blended restraint with a certain elasticity, one end of which is a hook and the other end is a leather loop, and the two are buckled together to achieve fixed wearing around the waist.

[0025] The front side of the multi-channel bowel sound collection restraint device is inlaid with 7 patch-type MEMS microphones, 6 of which are evenly distributed around a microphone at the center point. When in use, the microphone at the center point is aimed at the navel.

[0026] The background noise collection branch is independent of the multi-channel bowel sound collection strap device and collects the background noise through a separate patch-type MEMS microphone.

[0027] The automatic bowel sound assessment module includes a bowel sound signal detection submodule, a bowel sound automatic positioning and signal enhancement submodule, and a bowel sound assessment parameter calculation submodule.

[0028] The operating principle of the utility model is now described as follows:

[0029] When the present application is used, the multi-channel bowel sound collection belt device is fixedly worn around the waist, the microphone at the center point of the multi-channel bowel sound collection belt device is aimed at the navel, the multi-channel audio synchronous analog-to-digital conversion device synchronously receives 7-channel noisy bowel sound analog signals and background noise analog signals, and digitizes them, wherein the sampling rate is between 1kHz and 8kHz, the adaptive background noise elimination module implements an adaptive noise elimination algorithm for the synchronously input 7-channel noisy bowel sound digital signals and background noise digital signals, and outputs 7-channel noise-cancelled bowel sound digital signals, the Bluetooth wireless transmission module transmits the 7-channel noise-cancelled bowel sound digital signals to the paired mobile device application via Bluetooth, and the bowel sounds are automatically The dynamic evaluation module is integrated into the mobile device APP to process the received 7-channel denoised bowel sound digital signals; the module includes a bowel sound signal detection submodule, a bowel sound automatic positioning and signal enhancement submodule, and a bowel sound evaluation parameter calculation submodule; the bowel sound signal detection submodule realizes online detection of bowel sounds through a trained void convolutional neural network; the bowel sound automatic positioning and signal enhancement submodule implements a multiple signal classification algorithm to give the body part where the bowel sounds occur, and then gives the bowel sound enhancement signal on that body part through a Chebyshev spatial domain filter; the bowel sound evaluation parameter calculation submodule calculates the incidence, duration, intensity, power spectrum and other information of the located bowel sounds, and publishes it visually.

[0030] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A multi-channel bowel sound wireless monitoring device that adaptively eliminates background noise, characterized in that: It includes a multi-channel bowel sound and background noise collection module, an adaptive background noise elimination module, a Bluetooth wireless transmission module and a bowel sound automatic evaluation module, wherein the output end of the multi-channel bowel sound and background noise collection module is signal-connected to the input end of the adaptive background noise elimination module, the output end of the adaptive background noise elimination module is signal-connected to the input end of the Bluetooth wireless transmission module, and the output end of the Bluetooth wireless transmission module is signal-connected to the input end of the bowel sound automatic evaluation module; The multi-channel bowel sound and background noise collection module includes a multi-channel bowel sound collection restraint device, a background noise collection branch and a multi-channel audio synchronous analog-to-digital conversion device; The multi-channel bowel sound collection restraint device is specifically a rubber and Lycra cotton blended restraint with a certain elasticity, one end of which is a hook and the other end is a leather ring; The front side of the multi-channel bowel sound collection restraint device is inlaid with 7 patch-type MEMS microphones, of which 6 microphones are evenly distributed around a microphone at the center point; The background noise collection branch is independent of the multi-channel bowel sound collection strap device and collects background noise through a separate patch-type MEMS microphone; The automatic bowel sound assessment module includes a bowel sound signal detection submodule, a bowel sound automatic positioning and signal enhancement submodule, and a bowel sound assessment parameter calculation submodule.

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