Ultrasonic wind velocity measurement with time-difference method and wind velocity measurement system based on ARM micro-controller were introduced.
介绍了超声波时差法风速测量的基本原理，以及基于ARM微控制器的风速测量系统的实现方法。
By researching on plenty of data, we put forward a DSP-core ultrasonic flowmeter's measurement and control module with Time-difference method.
通过研究大量的资料，提出了以DSP为核心的时差法超声波流量计测控模块。
This paper explained the commonly used principle of ultrasonic flow meter: time-difference method and Doppler method and introduced the classification of the ultrasonic flow meter.
本文阐述了超声波流量计常用的时差法、多普勒法的测流原理，以及超声波流量计的分类。
This paper introduced the flow measuring principle of time-difference method of ultrasonic flow meter and the flow calculating method in flow measurement with velocity instrument.
论述了流速仪法测流及水轮发电机组现场效率试验的原理和计算方法。
This paper introduced the flow measuring principle of time-difference method of ultrasonic flow meter and the flow calculating method in flow measurement with velocity instrument.
论述了流速仪法测流及水轮发电机组现场效率试验的原理和计算方法。
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