Limited company of development of agriculture of charm of peaceful wave day is a collect farming , labour , trade , grind at an organic whole , what major is engaged in design of engineering of afforest of produce of zoology agriculture , green , gardens , construction , environmental protection applying material development to be an organic whole is integrated model enterprise 宁波天韵农业开发有限公司是一家集农、工、贸、研于一体,专业从事生态农业、绿色农产品、园林绿化工程设计、施工、环保应用材料开发为一体的综合型企业。
The design testing piezoelectric material surface acoustic during the experiment process in the paper has several merits : convenience , efficiency , no loss , fastness . and they can be realized . the design applies material piezoelectric response and anti - piezoelectric response to stimulus and receive saw , and apply the method of testing resonator frequency to calculate saw tested speed , simultaneously contrast the actual test result about different material to typical value in the paper 在本论文的研究实验过程中,给出了一种方便、有效、无损、快捷的检测压电材料表面声速的设计与实现,该设计中运用材料的压电效应和逆压电效应激励和接收saw ,并运用检测谐振频率的方法计算测量saw速度,同时给出了对不同材料的实际测试结果以及与资料典型值的对比。