Although China issued and implement the national criterion of GB/ T18604-2001 on the application of nature gas ultrasonic flowmeters, there are further international researches on factors which have impacts on measurement performance of ultrasonic meter as its wide applications.

1、

Gas ultrasonic flow-meter mainly by the ultrasonic transducer group, signal processing circuit and integrating the system of three parts.

气体超声波流量计主要由超声波换能器组、信号处理电路和积算系统三个部分组成。

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2、

Development of Gas Ultrasonic Flowmeter

气体超声波流量计的研制

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3、

stable running practice in mass flowmeter system of lanzhou-chengdu-chongqing oil product pipeline

兰成渝管道质量流量计系统稳定运行实践

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4、

ultrasonic gas mass flowmeter with temperature and pressure compensation

温压补偿型超声气体质量流量计

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5、

the mass flowmeter is also suitable for applications in other gases.

该流量计可用于其它气体质量流量的测量。

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6、

application of model 3500 or 3700 transmitter for micro motion mass flowmeter

Micro Motion质量流量计3500或3700型流量变送器的应用

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7、

combinative design of batch controller and mass flowmeter and application in process control

批量控制器与质量流量计的组合设计及其应用

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8、

a study on measurement and control techniques for mass flowmeter based on acoustic damping

声阻尼式质量流量计的测控技术研究

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9、

analysis on engineering application of the mass flowmeter

质量流量计的工程应用分析

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10、

signal detection and processing techniques in a new airborne mass flowmeter

新型机载质量流量计的信号检测与处理技术

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11、

analysis for the reason caused over measurement error made by mass flowmeter

质量流量计计量超差原因分析

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12、

design of new fashioned mass flowmeter

新型质量流量计的设计

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13、

A pulse output model digital vortex flowmeter is developed successfully.

成功实现了一台脉冲输出型数字涡街流量计。

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14、

Design of vortex flowmeter with temperature and pressure compensation based on HART protocol

基于HART协议的温压补偿型涡街流量计的设计

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15、

Wavelet transformation is adopted in this paper, and the basic principles of discrete wavelet transformation and power spectrum estimation based on continuous wavelet transformation are given. The simulation steps and results are presented, and the characteristics of the two methods discussed.

将小波变换用于涡街流量计，介绍了基于离散小波变换和连续小波变换功率谱估计的信号处理方法，给出了仿真步骤与结果，并讨论其特点，从而设计了基于DSP的信号处理系统。

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16、

According to the drawbacks of be liable to interfere and poor in precision in the vortex shedding flowmeter, a new method based on DFT was used to estimate the frequency of input signal.

针对目前涡街流量计易受干扰，精度不高的问题，信号采集处理单元采用基于DFT的频率估计方法，实现对传感器信号频率的估计。

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17、

The design and development of the conversion circuit to an intelligent vortex flowmeter were introduced. The converter used MSP430 microcontroller as the main component, which collected, processed the pulse signal from the pre-amplified circuit and sent out 4~ 40 mA standard signal.

介绍了以MSP430型单片机为核心的智能涡街流量计转换电路的设计与开发，涡街传感器前置放大板送出的脉冲信号进行采集处理并送D/A转换模块进行标准4～40mA输出。

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18、

Impact analysis of vortex flowmeter measured with duct-wall differential pressure method

管壁差压式涡街流量计测量影响因素分析

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19、

Signal Processing of Vortex Flowmeters and Nonlinear Dynamic Modeling of Sensors

涡街流量计数字信号处理和传感器动态非线性建模

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20、

An Application Research on Intelligent Vortex Street Flowmeter Based on Micro-processor

基于微处理器的智能涡街流量计应用研究

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