超声光栅实验仪的改进  

Improvement of Ultrasonic Grating Instrument

作　　者：孔祥明[1] 刘斌[2] 段雪松[1] 安莉[1] 邢红玉[1] Kong Xiangming;Liu Bin;Duan Xuesong;An Li;Xing Hongyu(School of Sciences,Hebei University of Technology,Tianjin,300401,China;School of Artificial Intelligence,Hebei University of Technology,Tianjin,300401,China)

机构地区：[1]河北工业大学理学院,天津300401 [2]河北工业大学人工智能学院,天津300401

出　　处：《中国现代教育装备》2022年第3期19-21,共3页China Modern Educational Equipment

基　　金：河北省高等教育教学改革研究与实践项目“基于课题研究型学习的大学生创新与科研能力培养模式研究”(编号:2017GJJG018);河北工业大学本科教育教学改革研究项目“提升大学物理实验教学效果,打造实践类‘金课’”(编号:201904005);河北工业大学本科教育教学改革研究项目“以创新与科研训练为基础的本科生毕业论文过程研究与实践”(编号:201802003);河北工业大学本科教育教学改革研究项目“新工科背景下构建科教融合创新实践平台的探索与研究”(编号:201902032)。

摘　　要：超声光栅是测量液体中声波传播速度的一种有效方法,是大学物理实验的重要内容之一。原有超声腔由于其结构设计存在缺陷导致现象微弱、难找且不稳定,同时压电陶瓷片极易出现电极腐蚀现象。为此改进了超声腔,摒弃其悬架结构,利用腔体自身平行度保证了衍射效果及稳定性,采用外压盖结构安装压电陶瓷片避免了电极腐蚀。经大量实验验证,新型结构超声腔具有可靠性高、易用性强的特点。Ultrasonic grating is an effective method to measure the propagation velocity of sound waves in liquid,which is one of the important contents of college physics experiments.The traditional ultrasonic cavity is weak,difficult to find and unstable due to its structural design defects,and the piezoelectric ceramic plate is prone to electrode corrosion phenomenon.In order to solve these problems,a new type of ultrasonic cavity is proposed in this paper.The suspension structure is abandoned,and the parallelism of the cavity itself is used to ensure the obvious and stability of the phenomenon.The piezoelectric ceramic plate is installed in the external cover structure to avoid the electrode corrosion phenomenon.Through a lot of practical experiments,it has been proved that the new ultrasonic cavity has the characteristics of high reliability and strong usability.

关 键 词：超声光栅 超声腔 压电陶瓷片 声速 

分 类 号：G642.423[文化科学—高等教育学] O422.1-4[文化科学—教育学]