ulpa 中文意思是什麼

ulpa 解釋
超高效空氣過濾器
  1. Later it was taken that the optimized design for geometry parameters of longitudinal and transverse array ulpa wedges, and the principles for the optimized design of wedges " angles and the distance from piezocrystal center along wedge surface to test surface were deduced

    隨后進行了縱向和橫向兩種線陣楔塊的幾何優化設計，推導出楔塊角度以及晶片中心沿楔塊表而到探測而距離的優化設計原則。
  2. First, it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width, side lobe amplitude, elimination of grating lobes ), amplitude of ultrasonic pressure, element viberation pattern, mutual radiation among elements, efficient test regions, ability to keep accurate and near - field distance and so on. based on the direction of ultrasonic field in ulpa deduced by ourselves. in addition, on the base of integrating all kinds of factors, it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer, and its design programme and interface were compiled

    首先在推導超聲相控線陣換能器聲場的指向性的基礎上，就各個晶片幾何參數對指向性指標（主瓣寬度、旁瓣幅度、消除柵瓣） 、聲壓幅值、陣元振動模式、陣元間互輻射、有效檢測區域、精確控制能力、近場長度等方面的影響進行了論述，並在綜合各方面影響的基礎上，提出了晶片幾何參數優化設計的原則和方法，編寫了設計程序和界面。
  3. Finally according to the above mentioned results, two universal ulpa were made and their performance were tested. these results indicated that on the whole, the values of parameters, such as sensitivity of each element, center frequency, relative bandwidth and cross coupling among near elements and so on, and their consistency all meet the ask of technique. therefore, both of transducers performance are favorable

    最後根據上述研討結果，製作了兩個通用超產相控線陣換能器，並進行了性能測試，結果表明兩個換能器各陣元靈敏度、中心頻率、相對帶寬、相鄰陣元間串波等參數值及其一致性均基本滿足技術要求，換能器性能良好。
  4. Geometry parameters of piezocrystals and wedges in ultrasonic line phased arrays transducer ( ulpa ) have important effects on transducers performance. so far, there havent been issued papers about optimized design for geometry parameters of piezocrystals and wedges based on considering all kinds of factors

    超聲相控線陣換能器晶片和楔塊的幾何參數對換能器性能的影響很大，迄今為止，尚未見在綜合考慮各方面因素的基礎上提出晶片和楔塊幾何優化設計方法的報道。
  5. Hepa / ulpa filter installation leak test. this test is performed to verify that the filters have been properly installed and are free of leaks

    Ulpa過濾器現場泄漏試驗。該項測試用於檢驗濾器已正確地安裝，沒有泄漏現象。
  6. Therefore, a primary research and discuss on optimized design for geometry parameters of piezocrystals and wedges in ulpa were taken in this study

    因此本研究從晶片和楔塊兩方面對超聲相控線陣換能器的幾何優化設計進行了初步研究和探討。
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