發(fā)布時(shí)間：2018-10-17 12:49

【摘要】：血壓是衡量人體健康狀況的重要指標(biāo),特別是連續(xù)血壓,它能夠間接反應(yīng)出心臟和血管的運(yùn)行狀況,是臨床上進(jìn)行疾病診斷、治療效果觀察以及疾病預(yù)防判斷的重要依據(jù)。但現(xiàn)在市面上的連續(xù)血壓測量設(shè)備,主要為可穿戴式電子血壓計(jì)都有著精確度差的缺點(diǎn),不能準(zhǔn)確的判斷人體是否出現(xiàn)危險(xiǎn)病態(tài),所以對血壓連續(xù)準(zhǔn)確的測量以及異常狀況的有效判斷在預(yù)防心血管并發(fā)癥以及對長期高血壓患者的降壓用藥起到良好的監(jiān)督作用和重要意義。因此,針對上述問題,本文對于血壓連續(xù)測量提出了一種新型方法-基于脈象分類的血壓自適應(yīng)連續(xù)測量。該方法采用新型傳感器一RF射頻雷達(dá)實(shí)現(xiàn)對人體橈動(dòng)脈脈搏波的雙路信號(hào)獲取,然后引入分層定勢聯(lián)想機(jī)制模型實(shí)現(xiàn)脈象的引導(dǎo)式自動(dòng)分類,最后通過分級自適應(yīng)血壓預(yù)測模型實(shí)現(xiàn)血壓的實(shí)時(shí)測量。論文的主要研究內(nèi)容包括:(1)深入了解RF-射頻雷達(dá)的工作原理以及其優(yōu)勢,設(shè)計(jì)一套人體橈動(dòng)脈脈搏波采集系統(tǒng),并利用Labview搭建出一套數(shù)據(jù)實(shí)時(shí)顯示與數(shù)據(jù)保存系統(tǒng)。通過與脈搏波采集系統(tǒng)金標(biāo)準(zhǔn)進(jìn)行對比驗(yàn)證了該系統(tǒng)的有效性。(2)脈象的準(zhǔn)確分類是后期血壓預(yù)測的基礎(chǔ),只有實(shí)現(xiàn)準(zhǔn)確的分類才能保證血壓預(yù)測的準(zhǔn)確性。基于人類定勢思維機(jī)制,我們提出了基于分層定勢聯(lián)想機(jī)制的脈象分類模型。首先進(jìn)行友邦因子分析實(shí)現(xiàn)脈象粗分類并確定引導(dǎo)方向,然后利用定勢聯(lián)想神經(jīng)網(wǎng)絡(luò)實(shí)現(xiàn)對脈象的有效分類。神經(jīng)元交互聯(lián)想網(wǎng)絡(luò)融合了引導(dǎo)式變異以及脈象演變規(guī)則具有較強(qiáng)的定勢聯(lián)想能力,可以有效地實(shí)現(xiàn)被測脈象與典型脈象的自聯(lián)想。(3)在血壓的預(yù)測階段,我們引入了分級自適應(yīng)血壓預(yù)測模型。首先,通過脈象建立其與血壓線性模型的內(nèi)部聯(lián)系,根據(jù)被測人的脈象以及相關(guān)信息實(shí)現(xiàn)一級血壓模型的動(dòng)態(tài)調(diào)整。然后,利用訓(xùn)練好的帶參數(shù)庫的PSO-BP神經(jīng)網(wǎng)絡(luò)實(shí)現(xiàn)二級血壓最終結(jié)果的調(diào)整。實(shí)驗(yàn)結(jié)果表明,基于分層定勢聯(lián)想機(jī)制的脈象分類模型可以對人體常見脈象實(shí)現(xiàn)較高的分類準(zhǔn)確度,其準(zhǔn)確率達(dá)到92.86%,相比其他方法具有更好的分類效果。同時(shí),血壓自適應(yīng)預(yù)測模型的預(yù)測準(zhǔn)確度總體達(dá)到了 94.65%,能夠?qū)Ξ惓Ｑ獕簲?shù)據(jù)做到準(zhǔn)確的判斷,并且對個(gè)人血壓的連續(xù)追蹤趨勢實(shí)現(xiàn)較好的跟隨性。
[Abstract]:Blood pressure is an important index to measure human health, especially continuous blood pressure. It can indirectly reflect the operation of heart and blood vessels. It is an important basis for clinical diagnosis, observation of therapeutic effect and judgment of disease prevention. However, the existing continuous blood pressure measurement devices on the market, mainly wearable electronic sphygmomanometers, have the disadvantage of poor accuracy and cannot accurately judge whether the human body is in danger or not. Therefore, continuous and accurate measurement of blood pressure and effective judgment of abnormal condition play a good role in the prevention of cardiovascular complications and antihypertensive medication in long-term hypertensive patients. Therefore, to solve the above problems, this paper proposes a new method for continuous blood pressure measurement, which is adaptive continuous blood pressure measurement based on pulse classification. In this method, a new type of sensor, RF radio frequency radar, is used to obtain the dual signals of human radial pulse wave, and then the hierarchical setting association mechanism model is introduced to realize the guided automatic classification of pulse images. Finally, a hierarchical adaptive blood pressure prediction model is used to realize the real-time blood pressure measurement. The main contents of this paper are as follows: (1) deeply understand the working principle and advantages of RF- RF radar, design a pulse wave acquisition system of human radial artery, and set up a real-time data display and data storage system using Labview. The validity of the system is verified by comparing it with the gold standard of pulse wave acquisition system. (2) the accurate classification of pulse image is the basis of blood pressure prediction in the later stage, and the accuracy of blood pressure prediction can only be guaranteed by accurate classification. Based on the human fixed thinking mechanism, we propose a pulse classification model based on hierarchical stereotype association mechanism. Firstly, the coarse classification of pulse images is realized by friendly factor analysis and the guiding direction is determined. Then, the effective classification of pulse images is realized by using the fixed associative neural network. The neural interactive association network combines the guided mutation and pulse evolution rules, and has a strong ability of setting association, which can effectively realize the autoassociation between the measured pulse and the typical pulse. (3) in the stage of blood pressure prediction, We introduce a hierarchical adaptive blood pressure prediction model. Firstly, the internal relation between pulse and blood pressure linear model is established, and the first order blood pressure model is dynamically adjusted according to the pulse and related information. Then, a trained PSO-BP neural network with parameter library is used to adjust the final results of secondary blood pressure. The experimental results show that the classification model based on hierarchical fixed pattern association mechanism can achieve higher classification accuracy for common human pulse images, and the accuracy is 92.86, which is better than other methods. At the same time, the prediction accuracy of the adaptive blood pressure prediction model is 94.65, which can accurately judge the abnormal blood pressure data, and achieve a better follow-up to the continuous tracking trend of individual blood pressure.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R443.5

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本文編號(hào)：2276713