海域水文资料的不断丰富和声速仪的广泛使用，推动了水深声速改正精度的提高。
The accuracy of depth reduction has been improving with the continuous accumulation of hydrographic data and widely application of sound velocity profiler.
本文第一章介绍我们的超声波声速仪的原理和误差分析，并给出它和回呜法的比较。
In the first part of this paper, the principle and the error analysis of our ultrasonic velocimeter are presented, and a comparison with the "Sing Around velocimeter" is given.
采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。
PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.
简要阐述了直接测量式声速剖面仪的测量原理及水下机探头的体系结构；
This paper describes the performance principle and system structure of a direct-survey sound velocity profiler.
对于声速测定仪中电子数显尺的常见故障原因进行了分析，并总结出维修方法。
Also it analysed the cause of the faults of the electronic displaying ruler in sound speed measuring unit.
相控阵多普勒计程仪具有基阵体积小，且无需迸行声速补偿等优点。
The phased-array Doppler log has several advantages, such as small size of array and no need of compensation for sound velocity.
在影响多普勒计程仪测速精度的多种因素中，以声速的影响为最大。
Among the factors which affect the accuracy of Doppler log, the speed of sound is the most important one.
用该仪器进行现场检测并通过金相试验对比，试验证明，用球化率测定仪比用测厚仪和探伤仪测得的声速值要精确，而且操作简单，可实现全过程自动控制。
It was approved by metallographic test that the sound velocity measured by the instrument was more accurate. The instrument was easy for operation and could be used to realize automatic control.
用该仪器进行现场检测并通过金相试验对比，试验证明，用球化率测定仪比用测厚仪和探伤仪测得的声速值要精确，而且操作简单，可实现全过程自动控制。
It was approved by metallographic test that the sound velocity measured by the instrument was more accurate. The instrument was easy for operation and could be used to realize automatic control.
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