作者：许月珍

作者单位：广东省计量科学研究院, 广东广州 510405

关键词：量值传递; 换能器; 压电材料; 匹配电路; 准确度

摘要：

针对超声基准装置量传范围较窄且现存超声功率基准装置电测系统中高频电压表不易于溯源等问题,利用压电材料能够将电能转变为机械能的效应原理,根据铌酸锂材料的结构特性,对超声基准装置的关键部件超声换能器及匹配电路进行了改造。改造后的基准装置准确度得到了提高,量传范围得到扩展,新换能器一定程度上解决了装置的高频高压溯源问题,确保了基准装置能在国际超声功率溯源体系中处于领先位置。

Appling lithium niobate transducer to primary ultrasonic standard devices

XU Yue-zhen

Guangdong Institute of Metrology, Guangzhou 510405, China

Abstract: In order to extend the transferring interval of the primary ultrasonic power devices and to solve the difficult traceability problem of high-frequency voltages for the electricity measuring system of those devices, the key component of the primary device, ultrasonic transducer, and its matching circuits have been remolded on the bases of the principle that piezoelectric materials can transform power into mechanical energy and the structural characteristics of lithium niobate materials. Then, the power accuracy of the remolded device has been improved, and the power interval has been extended. To some extend, the new transducer solved the traceability porblem of high frequency and high voltage and occupied the lead position in the international ultrasonic power traceability system.

Keywords: Value transfer; Ultrasonic transducer; Piezoelectric material; Matching circuit; Accuracy

2009, 35(3): 17-19  收稿日期: 2008-11-5;收到修改稿日期: 2009-1-17

基金项目: 

作者简介: 许月珍(1955-),女,工程师,主要从事毫瓦级、瓦级超声功率国家基准维护工作。

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