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| | An ultrasonic sensor structure used for the measurement of microsample humor density is described in this paper. The theoretical analysis and initial experiment of the sensor are presented. The result shows that is different from the traditional humor density sensors in high precision, microsample and fast response etc. | | 提出了一种用于微量体液密度测量的超声波传感器结构,并对其进行了理论分析和初步实验,结果表明:这种传感器结构与传统的体液密度传感器相比,具有测量精度高、所需试样少、响应快等特点,具有广泛的应用价值。 | | 文摘来源 | | We describe an ultrasonic sensor structure used for the measurement of microsample humor density. The theoretical analysis and initial experiment of the sensor are presented. The result shows that it is different from the traditional humor denisty sensor in high-precision, microsample and fast-response etc. | | 本文提出了一种用于微量体液密度测量的超声波传感器结构,并对 其进行了理论分析和初步实验,结果表明:这种传感器结构与传统的体液密度传感 器相比,具有测量精度高、所需试样少、响应快等特点,具有广泛的应用价值。 | | 文摘来源 | | This paper presents and discusses the liquid density sensing potential of a delay line Lamb-wave sensor configuration, where Lamb wave is excited only by interdigital transducer (IDT), without membrane when fabricated. An optimized cut orientation and the normalized thickness of substrate by using genetic algorithm is presented to improve the sensitivity of the sensor and to get low noise.Experimental measurements performed on Lamb-wave device fabricated from Y-Z LiNbO3 in a delay line configuration are fou... | | 血液、体液密度是生物医学工程领域中的一个重要物理参数。介绍了一种利用叉指换能器直接激发兰姆波的新型延迟线型微量液体密度传感器的方案。这种基于Lamb波的传感器结构在制作时不需要其它导层。为提高传感器的灵敏度,在提高机电耦合系数的同时,采用遗传算法,优化了传感器切向和归一化厚度。利用YZ-LiNbO3压电基片制成相应结构的传感器验证了本传感方案。 | | 文摘来源 | |   |
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