| 冻土纵,横波复合宽带超声换能器系列研制 |
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| 引用本文： | 彭万巍,袁易全.冻土纵,横波复合宽带超声换能器系列研制[J].实验力学,2000,15(1):36-42. |
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| 作者姓名： | 彭万巍 袁易全 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,冻土工程国家重点实验室,兰州,730000
2. 东南大学,无线电系,南京,21009 |
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| 基金项目： | 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室资助项目，课题批准号9724 |
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| 摘 要： | 根据冻土弹性波测试的要求，本文研制成功一种冻土测试用２５０ｋＨｚ、５００ｋＨｚ和１ＭＨｚ系列的纵波、横波复合宽带超声换能器。这种换能器具有灵敏度高、频带宽、声阻抗低的特点，适于冻土力学特性测试。作者介绍了它的结构及相应系统特性，并以１０ｐｓ的延时间精度，在零度以下气温条件下，实测了不同含水量（７％、１０％、１６％、２２％和２５％）及负温（－２℃、－４０℃、－６℃、－８℃、－１０℃、－１２℃、－１４
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| 关 键 词： | 冻土 复合宽带换能器 纵波声速 横波声速 |
| 文章编号： | 1001-4888(2000)01-0036-07 |
| 修稿时间： | 1999-04-01 |
Development of Broadband Ultrasonic Transducers for Frozen Soil Tests |
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| PENG Wan-wei,YUAN Yi-quan.Development of Broadband Ultrasonic Transducers for Frozen Soil Tests[J].Journal of Experimental Mechanics,2000,15(1):36-42. |
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| Authors: | PENG Wan-wei YUAN Yi-quan |
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| Institution: | PENG Wan-wei
;(Sram Key Laboratory of Frozen Soil Engineering, LIGG,CAS.Lanzhou 730000);YUAN Yi-quan
;(Tne University of the Dong Nan, Nanjing 210096) |
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| Abstract: | A series of broadband ultrasonic transducers are developed, which has the advantage of high sensitivity,wide frequency band and lower sonic impedance, and suitable for use in frozen soil test to measure the longitudinal and transverse waves in frozen soil. The structure and system characteristics of the transducers are described. An experiment for measuring the longitudinal and transverse wave velocities in Lanzhou loess with different moisure contents and under different minus temperatures is reported. The measuring precision in the experiment is up to 10ps. |
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| Keywords: | frozen soil broadband transducers longitudinal wave velocity transverse wave velocity |
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