本文關(guān)鍵詞： 超聲駐波懸浮傳輸 對(duì)置式換能器陣 幾何位置參數(shù) 聲場(chǎng)性能 勢(shì)阱位置　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：超聲駐波懸浮傳輸技術(shù)作為一種非接觸式傳輸技術(shù),廣泛應(yīng)用于生物、化學(xué)、材料及機(jī)械等科學(xué)領(lǐng)域,但關(guān)于利用對(duì)置式換能器陣裝置實(shí)現(xiàn)一定應(yīng)用的研究較少,因此本課題所研究的對(duì)置式換能器陣聲場(chǎng)性能仿真與實(shí)驗(yàn),將對(duì)置式換能器陣分為同軸陣元與非同軸陣元,通過(guò)仿真與實(shí)驗(yàn)分析這兩種模式下對(duì)應(yīng)聲場(chǎng)性能,從而實(shí)現(xiàn)一定的應(yīng)用。具體研究?jī)?nèi)容如下:首先,進(jìn)行對(duì)置式換能器陣形成聲場(chǎng)的分布規(guī)律的理論分析,推出波動(dòng)方程,在兩陣元同軸的情況下,推導(dǎo)聲場(chǎng)中聲壓、質(zhì)點(diǎn)速度、時(shí)間平均勢(shì)、聲輻射力等參數(shù)的分布規(guī)律,分析相位差對(duì)聲場(chǎng)強(qiáng)度的影響,得出駐波聲場(chǎng)形成的條件;對(duì)非同軸陣元形成的聲場(chǎng)進(jìn)行二維空間理論分析;比較不同換能器陣形成聲場(chǎng)的特點(diǎn),當(dāng)兩陣元一端振動(dòng)一端不振、兩端同向振動(dòng)、兩端相向振動(dòng)時(shí),形成駐波聲場(chǎng)的條件不同。其次,針對(duì)兩同軸陣元形成聲場(chǎng)進(jìn)行駐波形成與軸向懸浮傳輸?shù)难芯�。通過(guò)仿真與實(shí)驗(yàn)分析諧振頻率、工作頻率、陣元振幅、測(cè)量位置、測(cè)量角度等參數(shù)對(duì)單陣元聲場(chǎng)聲壓的影響;通過(guò)仿真與實(shí)驗(yàn)分析諧振腔高度與陣元間相位差對(duì)駐波聲場(chǎng)的影響,得出不同駐波諧振模式下小球的懸浮位置與各參數(shù)之間的關(guān)系;可通過(guò)調(diào)節(jié)諧振腔高度與相位差實(shí)現(xiàn)懸浮小球沿軸線方向上的非接觸傳輸,實(shí)現(xiàn)多個(gè)物體同時(shí)懸浮并傳輸。最后,通過(guò)仿真與實(shí)驗(yàn)對(duì)非同軸陣元聲場(chǎng)中駐波的形成與勢(shì)阱位置進(jìn)行研究。將陣元聲波傳輸路徑進(jìn)行規(guī)劃,通過(guò)仿真研究輻射面位置、輻/反射面距離、陣元傾角等幾何位置參數(shù)與耦合聲場(chǎng)之間的關(guān)系,通過(guò)實(shí)驗(yàn)分析幾何位置參數(shù)與勢(shì)阱位置的關(guān)系,總結(jié)出各參數(shù)對(duì)聲場(chǎng)性能的影響,如:當(dāng)兩陣元相位差為π,兩輻射面與反射面距離之和為半波長(zhǎng)偶數(shù)倍時(shí),諧振腔中形成駐波聲場(chǎng),可實(shí)現(xiàn)小球懸浮于該聲場(chǎng)中的勢(shì)阱位置。
[Abstract]:As a non-contact transmission technology, ultrasonic standing wave suspension transmission technology is widely used in biological, chemical, material and mechanical fields. Therefore, the contrast transducer array is divided into coaxial array element and non-coaxial array element, and the corresponding sound field performance is analyzed by simulation and experiment. The specific research contents are as follows: firstly, the theoretical analysis of the distribution law of the sound field formed by the counter transducer array is carried out, and the wave equation is deduced. In the case of coaxial of the two array elements, the sound pressure and particle velocity in the sound field are deduced. The distribution law of time average potential, sound radiation force and other parameters are analyzed, the influence of phase difference on sound field intensity is analyzed, the condition of standing wave sound field formation is obtained, the sound field formed by non-coaxial array element is analyzed in two-dimensional space theory, and the influence of phase difference on sound field intensity is analyzed. Comparing the characteristics of different transducer arrays to form sound field, when one end vibration of two arrays is not vibrating, both ends are in the same direction, and two ends are in opposite direction, the conditions for the formation of standing wave sound field are different. Secondly, The influence of resonant frequency, working frequency, array amplitude, measuring position and measuring angle on sound pressure of single array element is analyzed by simulation and experiment. The influence of the height of the resonator and the phase difference between the array elements on the standing wave sound field is analyzed by simulation and experiment, and the relationship between the suspended position of the small ball and the parameters under different standing wave resonance modes is obtained. By adjusting the height of the cavity and the phase difference, the non-contact transmission of the suspended sphere along the axis can be realized, and several objects can be suspended and transmitted simultaneously. Finally, The formation of standing wave and the position of potential well in the sound field of non-coaxial array element are studied by simulation and experiment. The transmission path of acoustic wave is planned, and the position of radiation surface and the distance between radiation and reflection surface are studied by simulation. The relationship between geometric position parameters such as dip angle of array elements and coupled sound field is analyzed experimentally, and the influence of each parameter on sound field performance is summarized by analyzing the relationship between geometric position parameters and potential well position. For example, when the phase difference of the two array elements is 蟺 and the sum of the distance between the two radiation surfaces and the reflection surface is half wavelength even, the standing wave sound field is formed in the resonator, which can realize the potential well position of the small sphere suspended in the sound field.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB552

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