CN102920475A - Gastrointestinal sound monitor system - Google Patents
Gastrointestinal sound monitor system Download PDFInfo
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- CN102920475A CN102920475A CN2012104300171A CN201210430017A CN102920475A CN 102920475 A CN102920475 A CN 102920475A CN 2012104300171 A CN2012104300171 A CN 2012104300171A CN 201210430017 A CN201210430017 A CN 201210430017A CN 102920475 A CN102920475 A CN 102920475A
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Abstract
The invention discloses a gastrointestinal sound monitor system. The system comprises a collection device which is used for collecting sounds of a plurality of gastrointestinal monitored positions and transmitting the sounds to a transfer device, the transfer device which is used for transferring the sounds of the plurality of monitored positions collected by the collection device into corresponding digital signals respectively, a storage and display device which is used for storing and displaying a plurality of acquired digital signals at real time, an identification and analyzing device which is used for respectively identifying the plurality of digital signals according to a threshold file, extracting corresponding gastrointestinal sound signals, analyzing, and analyzing corresponding indexes, so that the problem that the gastrointestinal sound signals cannot be automatically identified and analyzed, and the gastrointestinal sounds in multiple positions cannot be monitored, identified and analyzed synchronously in the prior art can be solved.
Description
Technical field
The embodiment of the invention relates to the medical machinery field, particularly a kind of gastrointestinal sound monitoring system.
Background technology
Gastrointestinal sound (gastrointestinal sounds) is the important indicator of abdominal part assessment, and the diagnosis of celiac disease and the assessment of gastrointestinal motility are all had larger help.All at Right Lower Abdomen or umbilicus because of auscultation position commonly used, be referred to as traditionally borborygmus (bowel sounds).
At present, the monitoring of domestic and international clinical gastrointestinal sound generally all adopts common stethoscope to be undertaken by the method for artificial auscultation.It is larger that the method is affected by auscultation personnel's subjectivity, and auscultation result's measurability has reduced the reliability of gastrointestinal sound monitoring with repeatable relatively poor.And, in the monitoring process of critical patient, needing just to carry out at set intervals an auscultation, the operation of this repetition auscultation has increased the workload that gastrointestinal sound is monitored.
Existing published a kind of gastrointestinal sound monitoring technology---Multi-channel bowel sound collecting system comprises a plurality of microphones, is used for acoustical signal is converted to the signal of telecommunication; Front-end processing circuit is used for signal of telecommunication filtering, amplification and level lifting; The A/D conversion equipment, being used for the electrical signal conversion after amplification, filtering and the level lifting is digital signal; And data transmission module, be used for sending digital signal.
Obviously this Multi-channel bowel sound collecting system is by carrying out multichannel collecting to gastrointestinal sound, and acquired signal is converted to digital signal stores, yet the data that this system stores are digital signal, this digital signal of identification and judgement monitoring result by human eye have difficulties, be easy to cause monitoring result and clinical appraisal to disconnect, affect clinical practice.
And another kind of published prior art, digitized borborygmus monitoring system, then adopt personal computer sound card and self-control auscultation head that the gastrointestinal sound at single position is monitored, and by the method for artificial cognition the gastrointestinal sound signal is marked, and carried out statistics and analysis by the signal to the leading indicator of the gastrointestinal sound that collects by manually-operated, yet only can will collect to such an extent that the gastrointestinal sound signal shows by waveshape signal in this system, follow-uply need to by artificial cognition and selected gastrointestinal sound signal, then calculate in batches the manual analysis gastrointestinal sound by computer.
Generally speaking, present published prior art has all only realized collection and the writing function of gastrointestinal sound, can not automatically process, evaluation and monitoring result, therefore, the result who collects still needs artificial cognition to judge or again auscultation identification, can not intuitively, effectively obtain the gastrointestinal sound monitoring result and be applied to clinical diagnosis.
Summary of the invention
The embodiment of the invention provides a kind of gastrointestinal sound monitoring system, in order to solving automatic identification and the analysis that can't realize the gastrointestinal sound signal that exists in the prior art, and the problem that can't carry out synchronous gastrointestinal sound monitoring, identification and analyze multiple location.
The embodiment of the invention provides a kind of gastrointestinal sound monitoring system, comprising:
Harvester is used for gathering the sound at a plurality of gastrointestinal monitorings position, and is sent in the reforming unit;
Reforming unit is used for the sound at a plurality of monitorings position of harvester collection is separately converted to corresponding digital signal;
Storage and display device are used for storage and show in real time a plurality of digital signals that obtain;
The identification and analysis device is used for according to threshold file a plurality of digital signals being identified respectively, extracts corresponding gastrointestinal sound signal, and analyzes, and parses corresponding indices.
The embodiment of the invention provides a kind of gastrointestinal sound monitoring system, has adopted the harvester of the sound that can gather simultaneously a plurality of gastrointestinals monitoring position, and has realized the automatic analysis of the indices of the automatic identification of a plurality of gastrointestinal sound signals and a plurality of gastrointestinal sound signals.
Description of drawings
Fig. 1 is the gastrointestinal sound detection system sketch map in the embodiment of the invention;
Fig. 2 is the structural representation of the harvester in the embodiment of the invention;
Fig. 3 is the reforming unit sketch map in the embodiment of the invention;
Fig. 4 is the filter sketch map in the embodiment of the invention;
Fig. 5 is the identification and analysis device sketch map in the embodiment of the invention;
Fig. 6 is the analysis module sketch map in the embodiment of the invention.
The specific embodiment
The embodiment of the invention provides a kind of gastrointestinal sound monitoring system, can gather simultaneously the sound at a plurality of gastrointestinals monitoring position, and has realized the automatic analysis of the indices of the automatic identification of a plurality of gastrointestinal sound signals and a plurality of gastrointestinal sound signals.
Illustrate the embodiment of the invention below in conjunction with accompanying drawing:
As shown in Figure 1, the embodiment of the invention has designed a kind of gastrointestinal sound monitoring system, comprising:
Harvester 101 is used for gathering the sound at a plurality of gastrointestinal monitorings position, and is sent in the reforming unit 102;
Storage and display device 103 are used for storage and show in real time a plurality of digital signals that obtain;
Identification and analysis device 104 is used for according to threshold file a plurality of digital signals that obtain being identified respectively, extracts corresponding gastrointestinal sound signal and analyzes, and parses corresponding indices.
Structure in the harvester of embodiment of the invention design comprises a plurality of acquisition modules 201 as shown in Figure 2, each acquisition module 201 corresponding gastrointestinal monitoring position.
Each acquisition module in the harvester comprises:
Connection tube 203 is used for connecting auscultation head 202 and mini-loud hailer 204;
Auscultation head 202 is used for gathering the sound that corresponding gastrointestinal is monitored the position, and transfers to mini-loud hailer 204 by connection tube 203;
Mini-loud hailer 204 is used for sound with the gastrointestinal monitoring position of correspondence and carries out transferring to conversion module after physics amplifies, and wherein, these mini-loud hailer 204 totally enclosed types are inserted in the connection tube 203.
In actual applications, it is the 3M Littmann specialty auscultation head of 214L that the embodiment of the invention can adopt for the model of auscultative signal characteristics design, interference tones enters in the time of can reducing data acquisition better, and the professional auscultation head of the type has improved the gastrointestinal sound signal amplification factor by its inner physical arrangement, with the contraction in length of connection tube to 10cm, produce the interference tones that friction causes in order to reduce connection tube in the auscultation process with object on every side, and by mini-loud hailer is inserted in the connection tube totally-enclosedly, reduce the external environment noise to the interference of image data.
The structural representation of the reforming unit of embodiment of the invention design comprises signal processing module 301 as shown in Figure 3, and signal conversion module 302.
In actual applications, reforming unit can adopt polylith to comprise the easy5509 development board of TLV320AIC23 and TMS320C5590A DSP, wherein, signal processing chip in the signal processing module can adopt TLV320AIC23, and the DSP in the signal conversion module can adopt TMS320C5509ADSP.Can audio signal be amplified 24 decibels by TLV320AIC23 in the embodiment of the invention.TMS320C5509A DSP can be sent to storage and display device with the digital signal of correspondence by the USB passage.And storage and display device can be converted into this digital signal oscillogram, show in display screen.
System in the embodiment of the invention also comprises filter, is used for a plurality of digital signals that above-mentioned reforming unit transforms are carried out respectively inputting storage and display device after the filtering, comprises band filter 401 and wavelet filtering module 402, as shown in Figure 4.
Band filter 401 is used for a plurality of digital signals that reforming unit transforms are carried out respectively bandpass filtering, remove in the waveform exist significantly, the interfering signal of random fluctuation.
In actual applications, because the frequency of gastrointestinal sound mainly concentrates between 60 ~ 1500Hz, therefore, the embodiment of the invention can be by the FIR band filter based on the design of THE DESIGN OF WINDOW FUNCTION method, the signal of rejection frequency outside 60 ~ 1500Hz, and by the storage and the display device waveform that the filtering result is corresponding show.This FIR band filter can adopt the kaiser window design that digital signal is carried out filtering, its sample frequency can be fs=8000Hz, the passband lower-cut-off frequency can be fc1=60Hz, the upper cut-off frequency cut-off frequency can be fc2=1500Hz, transition band width can be 20Hz, and logical stopband fluctuation then can be 0.01.
Band filter 401 has removed that ubiquitous waveform has significantly in the digital signal before the filtering, the signal of accidental fluctuation, the original characteristics that kept preferably the gastrointestinal sound waveform, but still there is near more that zero point, fluctuate, tiny, a low-energy disturbing wave, therefore, need to carry out signal input wavelet filtering module behind the bandpass filtering.
Wavelet filtering module 402 is used for the signal behind the bandpass filtering is carried out secondary filtering, will wherein be lower than the target signal filter of threshold value.The wavelet filtering module is used and is suitable for wavelet algorithm faint, the non-stationary signal Filtering Processing, the signal that carries out behind the bandpass filtering is carried out secondary filtering, particularly, can select to adopt N=4, decomposition level is that 5 symlet wavelet algorithm carries out secondary filtering to signal, removes near fluctuate zero point, tiny, low-energy disturbing wave.
The identification and analysis device of embodiment of the invention design, be used for removing by self-defined threshold value the interfering signal of digital signal, and obtain the gastrointestinal sound signal according to threshold file, go out its structure of gastrointestinal sound signal as shown in Figure 5 in that the acceptance of the bid of the waveform of screen display is red, comprise that threshold value sets up module 501, identification module 502 and analysis module 503.
Threshold value is set up module 501 and is used for many groups gastrointestinal sound signal of before extraction is extracted and vectorial normalized by multidimensional characteristic vectors, extracts common trait, determines the gastrointestinal sound characteristic threshold value, and foundation is the preservation threshold file also.
In actual applications, the embodiment of the invention is first by the harvester in the gastrointestinal sound monitoring system, the primary signal that reforming unit and storage and display device are obtained, then threshold value is set up module and can be carried out sound and waveform contrast to the many groups of primary signals that reach the people of health standards of extracting before by the chip by having specific function, select the persistent period greater than the 10ms(millisecond), peak swing is greater than 2000 gastrointestinal sound waveform, extract and vectorial normalized by multidimensional characteristic vectors, extract the common trait of the normal gastrointestinal sound waveform of many groups, determine the gastrointestinal sound characteristic threshold value, set up threshold file, and it is kept in the memorizer.
The first submodule 601 is used for each gastrointestinal sound signal is analyzed, and parses the gastrointestinal sound wave number amount in default acquisition time;
The second submodule 602 is used for each gastrointestinal sound signal is analyzed, and parses maximum and the minima of the persistent period of gastrointestinal sound wave in default acquisition time, the peak frequency of gastrointestinal sound wave and minimum frequency;
The 3rd submodule 603 is used for each gastrointestinal sound signal is analyzed, and parses in default acquisition time the meansigma methods of the persistent period of all gastrointestinal sound waves;
The 4th submodule 604 is used for each gastrointestinal sound signal is analyzed, and parses in default acquisition time all gastrointestinal sound wave frequency meansigma methods and power average value.
In actual applications, for the analysis result that makes the gastrointestinal sound signal more consistent with widely artificial auscultation of at present clinical practice, can be with ending the point of articulation and playing the point of articulation adjacent two or more waveforms of blanking time in 400ms and be denoted as a bunchiness gastrointestinal sound wave in the gastrointestinal sound signal, and the device by the embodiment of the invention to obtain the indices of bunchiness gastrointestinal sound wave as follows:
Bunchiness borborygmus wave number amount (its unit is: individual/per minute, cpm): the number N of gastrointestinal sound wave in the unit interval;
(its unit is bunchiness borborygmus sound wave percentage of time: %): the holding time summation T of gastrointestinal sound wave in the unit interval
M, divided by T detection time
1Multiply by the result after 100%, i.e. T
M/ T
1* 100%;
The equal time of bunchiness borborygmus popin, (its unit was: ms): the holding time summation T of gastrointestinal sound wave in the unit interval
M/ gastrointestinal sound number N, i.e. T
M/ N;
(its unit is bunchiness borborygmus wave power: w): the quadratic sum of the amplitude of all borborygmus in the unit interval.
Accuracy for the collection, storage and the Real time dynamic display that guarantee the gastrointestinal sound signal, the gastrointestinal sound monitoring system of the embodiment of the invention adopts the multithreading processing mode, one route journey is called collecting thread, be responsible for collection and the storage of signal, sample frequency with 8KHz gathers audio signal, and stores data at rear, low byte in the coded system of front (LittleEndian) according to high byte; Another route journey is called the demonstration thread, is responsible for the real-time demonstration of signal data, and according to the demonstration yardstick that sets in advance, key point is extracted in sampling to image data, and connects the waveform that key point forms correspondence.There is message synchronization mechanism between the above-mentioned multithreading, collecting thread was notified before data buffering overflows and is shown the signal data that shows in the thread update displayed screen, show thread after demonstration is complete, can notify immediately collecting thread cleaning buffering, in order to deposit the signal data of new collection.The advantage of this processing mode is to gather exactly and the shows signal data, and can not seize because of resource, and causes the disappearance of signal data.
The embodiment of the invention provides a kind of gastrointestinal sound monitoring system, can gather simultaneously the sound at a plurality of gastrointestinals monitorings position after will harvester improving, and has realized the automatic analysis of the indices of the automatic identification of gastrointestinal sound signal and gastrointestinal tone signal.
Particularly, the gastrointestinal sound monitoring system of the automatization of embodiment of the invention design can enough be carried out in real time gastrointestinal sound, dynamically, continuous record, and can be according to the characteristics of general gastrointestinal sound waveform, automatically the identification persistent period is shorter, acoustic energy is less, people's ear is difficult for the accurately gastrointestinal sound signal of identification, simultaneously can be to the persistent period of single gastrointestinal sound waveform, the gastrointestinal sound such as sound frequency and power wave character parameter quantizes, accurate various dimensions calculate and compare, thereby provide more objective, accurately, comprehensively, but the result of playback, and because this system can realize at an easy rate the gastrointestinal sound monitoring that continues and analyze, in time find change of illness state, reduce medical personnel's operating procedure and time, improve medical personnel's work efficiency, gastrointestinal sound monitoring for critical patient has more feasible practicality, also is conducive to clinical gastrointestinal sound monitoring simultaneously and formulates unified, measurable standard.
The present invention is with reference to describing according to flow chart and/or the block diagram of embodiment of the invention device and system and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computer or other programmable data processing device produces the device of the function that is used for being implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the embodiment of the invention.Like this, if these of the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. a gastrointestinal sound monitoring system is characterized in that, comprising:
Harvester is used for gathering the sound at a plurality of gastrointestinal monitorings position, and is sent in the reforming unit;
Reforming unit is used for the sound at a plurality of monitorings position of harvester collection is separately converted to corresponding digital signal;
Storage and display device are used for storage and show in real time a plurality of digital signals that obtain;
The identification and analysis device is used for according to threshold file described a plurality of digital signals being identified respectively, extracts corresponding gastrointestinal sound signal, and analyzes, and parses corresponding indices.
2. the system as claimed in claim 1 is characterized in that, described harvester further comprises a plurality of acquisition modules, the corresponding gastrointestinal monitoring of each acquisition module position, and wherein, each acquisition module comprises:
Connection tube is used for connecting auscultation head and mini-loud hailer;
Auscultation head is used for gathering the sound that corresponding gastrointestinal is monitored the position, and transfers to mini-loud hailer by connection tube;
Mini-loud hailer is used for sound with the gastrointestinal monitoring position of correspondence and carries out transferring to described conversion module after physics amplifies, and wherein, this mini-loud hailer totally enclosed type is inserted described connection tube.
3. system as claimed in claim 2 is characterized in that, the length of described connection tube is 10cm, and the model of described auscultation head is the 3M Littmann auscultation head of 214L.
4. the system as claimed in claim 1 is characterized in that, described reforming unit further comprises:
Signal processing module comprises a plurality of signal processing chips, and wherein, the corresponding gastrointestinal monitoring of each signal processing chip position for the audio signal that the sound at corresponding monitoring position is converted into a correspondence, is amplified step by step, and carried out filtering;
The signal conversion module, comprise a plurality of digital signal microprocessor DSP, the corresponding signal processing chip of DSP, each DSP is used for the filtered audio signal of the signal processing chip of correspondence is converted into corresponding digital signal, and sends to described storage and display device.
5. the system as claimed in claim 1 is characterized in that, described identification and analysis device further comprises:
Threshold value is set up module, and the many groups gastrointestinal sound signal that is used for extracting extracts and vectorial normalized by multidimensional characteristic vectors, extracts common trait, determines the gastrointestinal sound characteristic threshold value, sets up and preserve threshold file;
Identification module is used for extracting respectively corresponding gastrointestinal sound signal according to threshold file from a plurality of digital signals, and highlights by described storage and the display device waveform with the gastrointestinal sound signal that extracts;
Analysis module is used for each gastrointestinal sound signal is analyzed, and parses and preserve the indices of each gastrointestinal sound signal.
6. system as claimed in claim 5 is characterized in that, described analysis module further comprises:
The first submodule is used for each gastrointestinal sound signal is analyzed, and parses the gastrointestinal sound wave number amount in default acquisition time;
The second submodule is used for each gastrointestinal sound signal is analyzed, and parses maximum and the minima of the persistent period of gastrointestinal sound wave in default acquisition time, the peak frequency of gastrointestinal sound wave and minimum frequency;
The 3rd submodule is used for each gastrointestinal sound signal is analyzed, and parses the meansigma methods of the persistent period of all gastrointestinal sound waves in default acquisition time;
The 4th submodule is used for each gastrointestinal sound signal is analyzed, and parses all gastrointestinal sound wave frequency meansigma methods and power average value in default acquisition time.
7. such as each the described system in the claim 1 ~ 6, it is characterized in that, also comprise:
Filter is used for a plurality of digital signals that described reforming unit transforms are carried out respectively filtering, and filtered a plurality of digital signals are inputted described storage and display device.
8. system as claimed in claim 7 is characterized in that, described filter further comprises:
Band filter is used for a plurality of digital signals that described reforming unit transforms are carried out respectively bandpass filtering, remove in the waveform wherein exist significantly, the interfering signal of random fluctuation;
The wavelet filtering module is used for the signal behind the bandpass filtering is carried out secondary filtering, will wherein be lower than the target signal filter of threshold value, and inputs described storage and display device.
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| TWI579837B (en) * | 2016-03-18 | 2017-04-21 | Teng-Yu Lin | Wireless digital pitch monitoring system |
| CN110037733A (en) * | 2019-04-01 | 2019-07-23 | 四川大学华西医院 | A kind of Portable program control monitors system without wire body sound |
| CN112914502A (en) * | 2019-12-05 | 2021-06-08 | 南京理工大学 | Enterokinetic signal separation method based on EWT |
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Application publication date: 20130213 |