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真空绝热容器
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  vacuum insulation vessel
     STRUCTURE DESIGN OF A GETTER PACKET FOR THE ANNULAR SPACE OF A VACUUM INSULATION VESSEL
     真空绝热容器夹层吸附剂盒的结构设计
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  相似匹配句对
     Vacuum Chamber Design
     真空容器设计
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     STRUCTURE DESIGN OF A GETTER PACKET FOR THE ANNULAR SPACE OF A VACUUM INSULATION VESSEL
     真空绝热容器夹层吸附剂盒的结构设计
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     Discussion on leak detection of vacuum powder insulation vessels
     真空粉末绝热容器检漏方法之探讨
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     Calculating Way on Time of Filling Gas into the Vacuum Container
     真空容器充气时间计算
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     A small-size Dewar available to high-temperature insulation
     高温绝热真空杜瓦
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In this paper,a method for measuring acoustic power of plane piston transducer based on calorimetry is presented.When the transducer radiates ultrasound into castor oil,the temper-ature of castor oil will rise.Using 10-channel parallel thermocouples to measure the average temper-ature rise,energy absorbed by castor oil can be obtained.Acoustic power radiated from the tran-sducer can then be calculated.In this paper,the measurement results from the radiation force method are used as a reference.When the peak-to-peak...

In this paper,a method for measuring acoustic power of plane piston transducer based on calorimetry is presented.When the transducer radiates ultrasound into castor oil,the temper-ature of castor oil will rise.Using 10-channel parallel thermocouples to measure the average temper-ature rise,energy absorbed by castor oil can be obtained.Acoustic power radiated from the tran-sducer can then be calculated.In this paper,the measurement results from the radiation force method are used as a reference.When the peak-to-peak drive voltage of the transducer is 120 V,average of the results obtained using the proposed method and the radiation force method are 5.09 W and 6.06 W,respectively,with a difference of 16%.The overall uncertainty of the method is 9.3%.The method is simple,economical,practical and accurate.Therefore it is a usefule approach to measure acoustic power of plane piston transducer.

介绍了一种基于量热法的平面换能器声功率测量的方法。先将超声辐射入真空绝热容器内的蓖麻油中,使其温度升高。用热电偶并联测量蓖麻油的平均温升值,计算出蓖麻油所吸收的热能,进而求得换能器的声功率。测量结果表明,在换能器两端电压峰峰值为120V时,用本方法重复10次测得声功率的平均值为5.09W,相应的用辐射力法测得声功率的平均值为6.06W,两者相差16%。该方法的其综合不确定度为±9.3%。此方法使用设备简单且准确性较好,是超声功率测量的一种简单有效的途径。

 
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