粘性液体加载的压电板中声简正模的衰减

Attenuation of acoustic normal modes in piezoelectric plates loaded by viscous liquids.

作者信息

Anisimkin Ivan V, Anisimkin Vladimir I

机构信息

Institute of Radioengineering and Electronics, Russian Academy of Sciences, Moscow.

出版信息

IEEE Trans Ultrason Ferroelectr Freq Control. 2006 Aug;53(8):1487-92. doi: 10.1109/tuffc.2006.1665106.

DOI:10.1109/tuffc.2006.1665106

PMID:16921901

Abstract

Attenuation cac versus viscosity eta of adjacent liquid is measured for each normal mode n generated in 30 different plates of commercially available, piezoelectric crystals with thickness-to-wavelength ratio in the range h/lamda = 0.6 - 2.5. Two modes with an optimal combination of sensitivity (0.1 dB/mm x cP), insertion loss (<35 dB), and stop-band rejection (>15 dB) are found in liquid-loaded 128 degrees Y,X + 90 degrees - LiNbO3 with h/lamda = 1.67. Both modes are suited for viscosity measurements and other sensing tasks in viscous liquids. They have predominantly longitudinal displacement and large propagation velocity v(n), about 15,000 m/s.

摘要

针对在30块市售压电晶体板中产生的每个简正模式n，测量相邻液体的衰减cac与粘度eta的关系，这些晶体板的厚度与波长之比h/λ在0.6 - 2.5范围内。在h/λ = 1.67的液体加载128°Y,X + 90° - LiNbO3中发现了两种具有灵敏度（0.1 dB/mm x cP）、插入损耗（<35 dB）和阻带抑制（>15 dB）最佳组合的模式。这两种模式都适用于粘性液体中的粘度测量和其他传感任务。它们主要具有纵向位移和较大的传播速度v(n)，约为15,000 m/s。