CN102274009A - Respiratory and heartbeat signal processing circuit based on piezoelectric sensor - Google Patents
Respiratory and heartbeat signal processing circuit based on piezoelectric sensor Download PDFInfo
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- CN102274009A CN102274009A CN2010102027072A CN201010202707A CN102274009A CN 102274009 A CN102274009 A CN 102274009A CN 2010102027072 A CN2010102027072 A CN 2010102027072A CN 201010202707 A CN201010202707 A CN 201010202707A CN 102274009 A CN102274009 A CN 102274009A
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Abstract
The invention discloses a respiratory and heartbeat signal processing circuit based on a piezoelectric sensor. The circuit comprises a charge amplifying unit, a voltage amplifying unit, a power frequency wave trapping unit, an A/D (analog-to-digital) conversion unit, a processing unit, a storage unit, a display unit and the like. The processing circuit preprocesses a signal output by the piezoelectric sensor through an analog circuit unit and then completes the subsequent treatment on the signal in a digital way, thereby precisely extracting, separating and further storing respiratory and heartbeat signals to achieve the aims of counting respiratory and heartbeat times, observing respiratory and heartbeat wave forms, preliminarily carrying out respiratory and heart disease diagnosis and monitoring the physiological health for a long term.
Description
The strong class of Shen Jing roc ancestor flood celebrating Yang Xin Wang Jin pool far away Wang Xinan
[technical field]
The present invention relates to medical monitoring diagnostic instruments and circuit design field, be specifically related to a kind ofly, can obtain the breathing and the heart beating physiological parameter of human body, and tentatively carry out medical diagnosis on disease based on the breathing of piezoelectric transducer and the treatment circuit of heartbeat signal.
[background technology]
Cardiovascular and cerebrovascular disease is a kind of serious threat mankind, and particularly the commonly encountered diseases of middle-aged and elderly people health more than 50 years old even use most advanced, perfect at present treatment means, still can have the cerebrovascular accident survivor life more than 50% not take care of oneself fully! Every year is died from the number of cardiovascular and cerebrovascular disease up to 1,500 ten thousand people in the whole world, occupies various causes of the death first place.Cardiovascular and cerebrovascular disease has become the highest No.1 killer of the human dead cause of disease!
Simultaneously, the sleep disordered breathing that is caused by obstructive type, maincenter type or mixed type asphyxia is also seriously disturbing normal work of people and life always, causes sleep quality decline, extremely drowsiness and tired in the daytime.Long sleep disordered breathing even can cause a series of cardio-cerebrovascular and other related system disease.Sleep apnea is one group of proemial sleep disordered breathing disease, easy concurrent arrhythmia, hypertension even respiratory failure or sudden death, and the someone estimates that the whole world has 3000 people to die from primary disease every day.
The important means that reduces the mortality rate of cardiovascular and cerebrovascular disease and sleep apnea is prevention early, discovery morning, early treatment, so the at-once monitor technology of heart beating and breathing just seems more and more important.
Traditional breathing and heartbeat inspecting means mainly are sleep analysis monitor instrument (PSG) and electrocardiograph.This test mode is detailed and concrete, and the accuracy height.But sleep analysis monitor instrument and electrocardiograph need be fixed many electrodes, check inconveniently, and they are extremely expensive and heavy simultaneously, can not be with portable and domestic formula.
The polyvinylidene fluoride material piezoelectric constant is big, highly sensitive, frequency response range is wide and low price, and the treatment circuit of employing patent of the present invention can be suitable as the sensing material of portable domestic sleep monitor system very much.
Except that polyvinylidene fluoride material, also there are some to make the breathing heartbeat inspecting product and the patent of pick off with other material on the market.But these systems all exist some shortcomings more or less at the aspects such as disposal ability, detection and mounting means of sensor accuracy, signal processing circuit.
With regard to the signal processing circuit aspect, the sleep monitor system that has can only extract breath signal, can not detect and handle heartbeat signal.Simultaneously, most sleep monitor systemic-functions are too simple, can only finish the function that heart beating and breath signal are counted, and can not reach purpose such as diagnose the illness.A kind of " heartbeat and respiration measurement device ", the application number that as application number is 200310120732.6 patent disclosure be 200410088749.2 patent disclosure " a kind of contactless aroused in interest and monitoring of respiration technology " and etc., all can only finish to calculate and breathe and simple functions such as heart beating number of times.
[summary of the invention]
The objective of the invention is by the Digital Signal Processing mode finish to breathe and the collection of heartbeat signal, separate, storage and processing, realize that the while also can be realized the tentative diagnosis of some diseases to breathing and the counting and the waveform demonstration of heart beating.
For achieving the above object, the charge signal that the present invention exports piezoelectric transducer by AFE (analog front end) (charge amplifier, voltage amplifier and power frequency notch filter) earlier is converted into voltage and preliminary filtering civil power interfering signal (domestic mains frequency is 50Hz), and each module of giving processing unit with signal by A/D converter is handled again.
In processing unit, earlier signal is carried out further Filtering Processing by digital filter in the filtration module and corresponding filtering algorithm, filtering comprises the various interfering signals of the noise signals such as pyroelectric effect noise that city's electrical noise, components and parts noise, electromagnetic interference noise and variations in temperature cause, improves the signal to noise ratio of signal.Isolate in the mode of digital filtering by separation module and breathe and heartbeat signal: consider the normal adult respiratory frequency 16～20 times/minute, therefore heart rate 60～100 times/minute can think that 0～0.7Hz is a breath signal, and 0.7Hz is above to be heartbeat signal.
Isolated breathing and heartbeat signal obtain signal frequency and cycle by counting module respectively.Breathing and heartbeat signal frequency and waveform are re-used as the input of diagnostic module and carry out medical diagnosis on disease and self diagnosis.Wherein, medical diagnosis on disease is that the breathing that will measure or each disease signal in heartbeat signal waveform and signal frequency and the disease database and eupnea or heartbeat signal compare.If similar, judge that then this tester may suffer from this disease to the wave character of certain disease.Self diagnosis is that the breathing that will measure or some data among heartbeat signal and the historical measuring-signal data base are compared, if the discovery waveform has obvious difference then to judge in conjunction with disease database whether this tester suffers from disease and is chronic disease or acute disease.
Show to breathe by display unit at last and the frequency of heartbeat signal, cycle, waveform and whether normal, may suffer from which disease etc. as if undesired.
The invention has the beneficial effects as follows:
Precision height, cost are low, powerful, can clean cut separation heart beating and breath signal, obtain breathing frequency, cycle and waveform with heart beating, energy long-term observation and storage human body heart beating and physiology of respiration parameter, and can tentatively finish the medical diagnosis on disease that some breathe class and heart class, realize long term human physiological health monitoring function.
[specific embodiment and description of drawings]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by the specific embodiment.
Fig. 1 is the schematic flow sheet of whole signal processing circuit.At first the signal of piezoelectric transducer measurement is converted into voltage signal by an electric charge amplifying unit, and the electric charge amplifying unit is also finished and converted the pick off high impedance to low-impedance effect simultaneously.Adopt a power frequency trap wave unit with 50Hz civil power interference filtering by the voltage amplification unit after suitably amplifying.Convert the digital signal post-processing unit to by the A/D converting unit afterwards and finish signal is done further filtering, breathe and the separating of heartbeat signal, counting and storage and certain medical diagnosis on disease function.
Fig. 2 is an example schematic judging the sleep apnea type by respiratory waveform.Medically, sleep apnea mainly is divided into three kinds: obstructive sleep apnea, centric sleep apnea and mixed type sleep apnea.The pathogeny of three kinds of sleep apnea diseases and clinical manifestation are all variant.Aspect breast abdomen phugoid mode of motion mode: the breast abdomen simultaneously and do simultaneous movements during eupnea; Obstructive type apnea patient asphyxia shows as the breast abdomen and still has fluctuating, and just thoracic respiration and ventral breathing are anti-phase motion; Maincenter type apnea patient asphyxia shows as the undulatory motion of breast abdomen and stops; Its asphyxia symptom of mixed type apnea patient has obstructive type and maincenter type concurrently and suspends symptom for two kinds, during the motion of breast abdomen and when stopping and making anti-phase motion.Therefore, be the monitoring sleep breath state, can pass through the undulatory motion situation of piezoelectric transducer monitoring human chest and abdominal part respectively, thereby judge whether to have the sleep-apnea shape and which kind of belongs to and suspend type.Among Fig. 2, figure a is the respiratory waveform of eupnea; Figure b is the respiratory waveform that obstructive type suspends; The respiratory waveform that figure c suspends for the maincenter type; Figure d is the respiratory waveform that mixed type is suspended.From figure, can clearly observe all kinds and suspend the difference of disease respiratory waveform.Therefore, can diagnose out the type of sleep apnea at an easy rate by the diagnostic module of processing unit.
Can finish by similar mode for heart class disease and other diagnosis of breathing the class disease.For example, whether aspects such as the frequency by detecting heartbeat signal, amplitude variations, Wave crest and wave trough distortion can the tentative diagnosis tester suffer from cardiovascular and cerebrovascular diseases such as arrhythmia, ventricular fibrillation.Simultaneously, contrast by breathing that test is obtained and heartbeat signal and the signal measured in the past, simultaneously can judge tentatively that in conjunction with disease database the tester suffers from various chronic diseases or acute disease: if the breathing of every day or every month and heartbeat waveform and frequency then may suffer from certain chronic disease all in slow variation; If breathing was compared with former measurement result with heartbeat waveform sudden change has been taken place, one of possible cause is to suffer from certain acute disease, needs the retest checking or directly goes to hospital to do further detailed inspection.
Above content be in conjunction with a kind of embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. a breathing and a heartbeat signal treatment circuit based on piezoelectric transducer mainly partly are made up of electric charge amplifying unit, voltage amplification unit, power frequency trap wave unit, A/D converting unit, processing unit, memory element, display unit etc.
2. signal processing circuit according to claim 1 is characterized in that: based on piezoelectric transducer, sensor material is a Kynoar.
3. processing unit according to claim 1 is characterized in that: comprise a filtration module, a separation module, a counting module, a diagnostic module and a control module at least.
4. processing unit according to claim 1 is characterized in that: the function that can realize its each module by software or hardware mode.
5. separation module according to claim 3 is characterized in that: isolate by the mode of digital filtering and breathe and heartbeat signal.
6. diagnostic module according to claim 3 is characterized in that: comprise two kinds of diagnostic modes of medical diagnosis on disease and self diagnosis at least.
7. medical diagnosis on disease pattern according to claim 6 is characterized in that: carry out the similarity contrast by various diseases data in the breathing that will measure or heartbeat signal data and the corresponding disease database, whether tentative diagnosis may suffer from disease.
8. self diagnostic mode according to claim 6 is characterized in that: compare with the data that measured in the past by the breathing or the heartbeat signal data that will measure, whether tentative diagnosis suffers from chronic disease or other acute disease.
9. memory element according to claim 1 is characterized in that: comprise a disease signal data base and a historical measuring-signal data base at least.
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| CN2010102027072A CN102274009A (en) | 2010-06-13 | 2010-06-13 | Respiratory and heartbeat signal processing circuit based on piezoelectric sensor |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860151A (en) * | 2014-03-12 | 2014-06-18 | 郑州雅晨生物科技有限公司 | Portable SAHS (Sleep Apnea Hypopnea Syndrome) screening device with automatic analysis function |
| CN105139582A (en) * | 2015-07-28 | 2015-12-09 | 成都乐享智家科技有限责任公司 | Infant healthy sleep protection system and realization method thereof |
| CN105832288A (en) * | 2015-01-30 | 2016-08-10 | Toto株式会社 | Body information detection system |
| CN107960992A (en) * | 2017-03-16 | 2018-04-27 | 纳智源科技（唐山）有限责任公司 | Signal processing apparatus and method based on human body respiration heartbeat characteristic wave |
| WO2018149057A1 (en) * | 2017-02-20 | 2018-08-23 | 深圳市迈迪加科技发展有限公司 | Monitoring system |
| CN108925524A (en) * | 2018-07-03 | 2018-12-04 | 华南农业大学 | A kind of pest robot scaler based on piezoelectric transducer |
| CN109383215A (en) * | 2017-08-07 | 2019-02-26 | 上海海拉电子有限公司 | A kind of air-conditioner control system and air conditioning control method for vehicle |
| CN109480783A (en) * | 2018-12-20 | 2019-03-19 | 深圳和而泰智能控制股份有限公司 | A kind of apnea detection method, apparatus and calculate equipment |
| CN109620176A (en) * | 2018-12-05 | 2019-04-16 | 广东工业大学 | A kind of intelligent sleep monitoring method and device |
| CN110101374A (en) * | 2019-04-17 | 2019-08-09 | 复旦大学附属儿科医院 | Newborn's body temperature heartbeat detection induction system |
| CN110200620A (en) * | 2019-06-06 | 2019-09-06 | 中山大学孙逸仙纪念医院 | Multi-modal cardiac data detection method, device, storage medium and terminal device |
| CN110279411A (en) * | 2019-06-06 | 2019-09-27 | 中山大学孙逸仙纪念医院 | A kind of cardiac data method for detecting abnormality, device, storage medium and terminal device |
| CN110612060A (en) * | 2017-05-22 | 2019-12-24 | 苹果公司 | Multielement Piezoelectric Sensors for Physiological Measurements |
| US11375957B2 (en) | 2016-08-12 | 2022-07-05 | Apple Inc. | Vital signs monitoring system |
| CN115990002A (en) * | 2023-03-21 | 2023-04-21 | 首都医科大学宣武医院 | Vital sign monitoring system and method |
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- 2010-06-13 CN CN2010102027072A patent/CN102274009A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103860151A (en) * | 2014-03-12 | 2014-06-18 | 郑州雅晨生物科技有限公司 | Portable SAHS (Sleep Apnea Hypopnea Syndrome) screening device with automatic analysis function |
| CN105832288B (en) * | 2015-01-30 | 2019-03-15 | Toto株式会社 | Biological information detection system |
| CN105832288A (en) * | 2015-01-30 | 2016-08-10 | Toto株式会社 | Body information detection system |
| CN105139582A (en) * | 2015-07-28 | 2015-12-09 | 成都乐享智家科技有限责任公司 | Infant healthy sleep protection system and realization method thereof |
| US11375957B2 (en) | 2016-08-12 | 2022-07-05 | Apple Inc. | Vital signs monitoring system |
| US11918381B2 (en) | 2016-08-12 | 2024-03-05 | Apple Inc. | Vital signs monitoring system |
| WO2018149057A1 (en) * | 2017-02-20 | 2018-08-23 | 深圳市迈迪加科技发展有限公司 | Monitoring system |
| CN107960992A (en) * | 2017-03-16 | 2018-04-27 | 纳智源科技（唐山）有限责任公司 | Signal processing apparatus and method based on human body respiration heartbeat characteristic wave |
| CN107960992B (en) * | 2017-03-16 | 2023-12-01 | 纳智源科技（唐山）有限责任公司 | Signal processing device and method based on human respiratory heartbeat characteristic wave |
| US12219877B2 (en) | 2017-05-22 | 2025-02-04 | Apple Inc. | Multi-element piezo sensors for physiological measurements |
| CN110612060B (en) * | 2017-05-22 | 2022-09-02 | 苹果公司 | Multi-element piezoelectric sensor for physiological measurements |
| CN110612060A (en) * | 2017-05-22 | 2019-12-24 | 苹果公司 | Multielement Piezoelectric Sensors for Physiological Measurements |
| US11349063B2 (en) | 2017-05-22 | 2022-05-31 | Apple Inc. | Multi-element piezo sensor for in-bed physiological measurements |
| CN109383215A (en) * | 2017-08-07 | 2019-02-26 | 上海海拉电子有限公司 | A kind of air-conditioner control system and air conditioning control method for vehicle |
| CN109383215B (en) * | 2017-08-07 | 2021-09-10 | 上海海拉电子有限公司 | Air conditioner control system and air conditioner control method for vehicle |
| CN108925524A (en) * | 2018-07-03 | 2018-12-04 | 华南农业大学 | A kind of pest robot scaler based on piezoelectric transducer |
| CN109620176A (en) * | 2018-12-05 | 2019-04-16 | 广东工业大学 | A kind of intelligent sleep monitoring method and device |
| CN109480783A (en) * | 2018-12-20 | 2019-03-19 | 深圳和而泰智能控制股份有限公司 | A kind of apnea detection method, apparatus and calculate equipment |
| CN110101374B (en) * | 2019-04-17 | 2022-08-16 | 复旦大学附属儿科医院 | Body temperature and heartbeat detection sensing system for newborn |
| CN110101374A (en) * | 2019-04-17 | 2019-08-09 | 复旦大学附属儿科医院 | Newborn's body temperature heartbeat detection induction system |
| CN110279411A (en) * | 2019-06-06 | 2019-09-27 | 中山大学孙逸仙纪念医院 | A kind of cardiac data method for detecting abnormality, device, storage medium and terminal device |
| CN110200620A (en) * | 2019-06-06 | 2019-09-06 | 中山大学孙逸仙纪念医院 | Multi-modal cardiac data detection method, device, storage medium and terminal device |
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| CN115990002B (en) * | 2023-03-21 | 2024-03-19 | 首都医科大学宣武医院 | Vital sign monitoring system and method |
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