本文選題：夜間動態(tài)血壓測量 + 改進示波法��； 參考：《江西理工大學》2017年碩士論文

【摘要】：心血管疾病是世界上非常普遍的疾病之一,而隨著人們越來越關注自身的身體健康狀況,人們也越來越迫切需要一款能夠準確反映人體血壓狀況的儀器設備。研究表明,夜間動態(tài)血壓是評估降壓治療24小時后效果的重要指標。然而目前市面上電子血壓儀常采用袖帶測量血壓,由于采用先升壓后再降壓的測量方法測量血壓,該方法測量時間長,對受測者影響較大,打擾受測者晚間睡眠,不能實現夜間動態(tài)血壓測量,所以設計一種測量時間少且對受測者影響較小,能夠實現夜間動態(tài)血壓測量的智能動態(tài)血壓測量儀迫在眉睫。在此背景下,從市場的迫切需求出發(fā),廣泛借鑒國內外己有經驗成果,深入研究血壓測量方法,設計了一款可夜間測量的智能動態(tài)血壓測量系統(tǒng)。針對傳統(tǒng)袖帶式示波法不能實現真正的動態(tài)測量過程以及不適合夜間測量這兩個缺陷,提出了改進示波法測量動態(tài)血壓。改進示波法測量動態(tài)血壓的兩個關鍵技術是心率變異性分析算法實現以及定量階梯式升壓過程實現。(1)為實現改進示波法的動態(tài)測量過程,必須在心率測量模式下檢測人體心率信號,然后通過心率變異性分析和定時器相結合的技術實現動態(tài)測量過程。其中心率變異性分析選用Welch算法實現,而為改善算法的分辨率采用組合窗實現加窗處理。心率變異性分析實驗結果表明:采用基于組合窗的Welch算法在MSP430平臺上得到的結果和標準的MATLAB心率變異性分析程序的結果誤差較小,基本實現了心率變異性分析算法,從而基本達到了智能動態(tài)血壓測量的要求。(2)為實現定量階梯式升壓過程,采用基于模糊PID控制算法來調整加壓過程的斜率來實現線性加壓過程。并可通過相應的上位機實現控制過程中壓力信號的追蹤與保存,以便于分析控制誤差。定量階梯式升壓實驗結果表明:采用模糊PID控制算法實現定量階梯式升壓測量方式取得了較小的控制誤差,同時也可以觀察到相應的脈搏波信號,說明該血壓測量方法是可行的,從而基本達到了夜間血壓測量的要求。
[Abstract]:Cardiovascular disease is one of the most common diseases in the world, and as people pay more and more attention to their own health, people are in urgent need of an instrument that can accurately reflect the human blood pressure. The study shows that ambulatory blood pressure at night is an important index to evaluate the effect of antihypertensive therapy 24 hours later. However, at present, the electronic blood pressure meter on the market often uses cuff to measure blood pressure. Because the blood pressure is measured by the method of first rising blood pressure and then lowering blood pressure, this method measures blood pressure for a long time, which has a great influence on the subjects and interrupts the subjects' sleep at night. It is not possible to measure ambulatory blood pressure at night, so it is urgent to design an intelligent ambulatory blood pressure measuring instrument which has less time and less influence on the subjects, and can realize the measurement of ambulatory blood pressure at night. Under this background, proceeding from the urgent demand of market, drawing lessons from the domestic and foreign experience, deeply studying the method of blood pressure measurement, a kind of intelligent ambulatory blood pressure measurement system which can measure blood pressure at night is designed. Aiming at the two defects that the traditional cuff band oscillographic method can not realize the real dynamic measurement process and is not suitable for nocturnal measurement, an improved oscillographic method is proposed to measure ambulatory blood pressure. The two key techniques of improved oscillographic method to measure ambulatory blood pressure are the realization of heart rate variability analysis algorithm and the realization of quantitative stepwise boost process. The human heart rate signal must be detected in the heart rate measurement mode, and then the dynamic measurement process must be realized by the combination of heart rate variability analysis and timer. Welch algorithm is used to analyze heart rate variability, and combination window is used to improve the resolution of the algorithm. The results of heart rate variability analysis show that the results obtained on MSP430 platform by Welch algorithm based on combinatorial window and the result error of standard MATLAB heart rate variability analysis program are small, and the algorithm of heart rate variability analysis is basically realized. Thus, the requirement of intelligent ambulatory blood pressure measurement is basically met. In order to realize the quantitative stepwise boost process, a fuzzy PID control algorithm is adopted to adjust the slope of the pressurization process to realize the linear pressurization process. The tracking and saving of the pressure signal can be realized by the corresponding upper computer, so that the control error can be analyzed easily. The experimental results of quantitative stepwise boost show that the fuzzy PID control algorithm is used to realize the quantitative stepwise boost measurement with small control error, and the corresponding pulse wave signals can be observed. It shows that the method is feasible and meets the requirement of nocturnal blood pressure measurement.
【學位授予單位】：江西理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH776;TP273

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本文編號：1837322