本文選題：壓電泵　切入點(diǎn)：微流體系統(tǒng)　出處：《蘇州大學(xué)》2015年碩士論文

【摘要】：壓電驅(qū)動(dòng)微流體系統(tǒng)具有結(jié)構(gòu)簡(jiǎn)單、效率高和響應(yīng)速度快等特點(diǎn),隨著科學(xué)技術(shù)的不斷發(fā)展,其在各個(gè)領(lǐng)域的應(yīng)用日漸廣泛。然而,壓電驅(qū)動(dòng)微流體系統(tǒng)在實(shí)際使用中存在脈動(dòng)問題,這限制了其在高精度和高穩(wěn)定系統(tǒng)中的使用。為了提升壓電驅(qū)動(dòng)微流體系統(tǒng)的精確性和穩(wěn)定性,本文針對(duì)壓電驅(qū)動(dòng)微流體系統(tǒng)脈動(dòng)產(chǎn)生的原因,重點(diǎn)從驅(qū)動(dòng)電壓波形和流體濾波器兩方面展開了脈動(dòng)抑制方法的研究,實(shí)現(xiàn)了系統(tǒng)脈動(dòng)的有效抑制。首先,對(duì)壓電驅(qū)動(dòng)微流體系統(tǒng)脈動(dòng)產(chǎn)生機(jī)理進(jìn)行探索,分析了系統(tǒng)脈動(dòng)的影響因素,在此基礎(chǔ)上,分別研究了視覺檢測(cè)、電子天平檢測(cè)和流量傳感器檢測(cè)三種方法,通過實(shí)驗(yàn)確定流量傳感器檢測(cè)方法,流量傳感器檢測(cè)法是一種客觀可行的系統(tǒng)脈動(dòng)檢測(cè)方法,其既能滿足實(shí)時(shí)性要求,又能夠直觀表征系統(tǒng)脈動(dòng)的大小。在系統(tǒng)脈動(dòng)影響因素分析的基礎(chǔ)上,對(duì)比研究分析了不同的驅(qū)動(dòng)電壓波形的脈動(dòng)抑制效果,提出了基于驅(qū)動(dòng)電壓波形修正的脈動(dòng)抑制方法,利用“橢圓修圓法”原理,研究了不同波形修圓參數(shù)的系統(tǒng)脈動(dòng)抑制效果,以流速穩(wěn)定性為標(biāo)準(zhǔn),獲得了效果最佳的修圓參數(shù)組合。為了獲得滿意的脈動(dòng)抑制效果,設(shè)計(jì)了一種用于抑制系統(tǒng)脈動(dòng)的流體濾波器,根據(jù)濾波器的工作原理,研究了管道形狀、通道尺寸和薄膜半徑等因素對(duì)脈動(dòng)抑制效果的影響規(guī)律。同時(shí),利用Comsol軟件對(duì)流體濾波器的性能進(jìn)行仿真分析,依據(jù)脈動(dòng)抑制效果,選擇了最優(yōu)的尺寸和結(jié)構(gòu)。最后,以給定目標(biāo)流速下的系統(tǒng)脈動(dòng)抑制效果為目標(biāo),采用驅(qū)動(dòng)電壓波形修正與流體濾波器結(jié)合的脈動(dòng)抑制方法,通過實(shí)驗(yàn)驗(yàn)證了抑制方法的有效性和可靠性。
[Abstract]:With the development of science and technology, piezoelectric driven micro-fluid systems have been widely used in various fields, because of their simple structure, high efficiency and fast response.However, there is a pulsation problem in the practical use of piezoelectric driven micro-fluid systems, which limits their use in high-precision and high-stability systems.In order to improve the accuracy and stability of piezoelectric driven microfluid system, this paper focuses on the research of pulsation suppression methods from two aspects of driving voltage waveform and fluid filter, aiming at the causes of pulsation in piezoelectric driven microfluid system.The effective suppression of system pulsation is realized.Firstly, the mechanism of pulsation in piezoelectric driven microfluid system is explored, and the factors influencing the pulsation of the system are analyzed. On the basis of this, three methods of vision detection, electronic balance detection and flow sensor detection are studied, respectively.The detection method of flow sensor is an objective and feasible method, which can not only meet the real-time requirements, but also can directly characterize the magnitude of the system pulsation.On the basis of the analysis of the factors affecting the pulsation of the system, the pulsation suppression effect of different driving voltage waveforms is compared and analyzed, and the pulsation suppression method based on the correction of the driving voltage waveform is put forward, and the principle of "elliptical correction circle method" is used.The pulsation suppression effect of different waveform correction parameters was studied. The optimal correction parameters were obtained according to the stability of velocity of flow.In order to obtain satisfactory pulsation suppression effect, a fluid filter is designed to suppress the pulsation of the system. According to the working principle of the filter, the shape of the pipe is studied.The influence of channel size and film radius on pulsation suppression effect.At the same time, the performance of fluid filter is simulated and analyzed by Comsol software. According to the effect of pulsation suppression, the optimal size and structure are selected.Finally, aiming at the system pulsation suppression effect under given target velocity, the pulsation suppression method combining driving voltage waveform correction with fluid filter is adopted, and the validity and reliability of the suppression method are verified by experiments.
【學(xué)位授予單位】：蘇州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

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本文編號(hào)：1724145