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1)  air flow measurement
空气流量测量
2)  mass airflow rate measurement
空气质量流量测量
1.
Based on the theory of heat transfer and mass airflow rate measurement for internal combustion engine,first,a hot film mass airflow microsensor on self-diagnosis is designed.
该方法根据内燃机中的热量传递和空气质量流量测量的基本原理,设计了基于自诊断的热膜式空气质量流量微型传感器,该传感器由基于Heraeus微硅片的加热传感单元与温度传感单元、信号处理与转换器、加热器、加热控制器和微型计算机组成。
3)  air gauging
空气测量
4)  air flow
空气流量
1.
In order to solve these problems,this paper analyzed the application of the multi-sensors information fusion technology in air flow test system and proposed a way to design multi-sensors air flue test system based on LabVIEW.
在传统的空气流量测试系统中,存在着测试精度低、工作量大等问题。
2.
In order to keep the stability of idle speed with better control for the air flow in idle speed mode,a driver circuit of stepper motor is designed in this paper,according to the working theory of idle control device using stepper motor,and the idle device is controlled by a board based Digital Signal Processor(DSP) which integrates the driver circuit.
为了更好地控制怠速空气流量,以保持发动机的怠速稳定性,根据步进电机式怠速控制阀的工作原理设计了步进电机的驱动电路,并使用基于数字信号处理器(DSP)的已集成该驱动电路的控制电路板对怠速阀进行控制。
3.
The flow field of the core engine inlet was numerically calculated to solve the problem that the air flow measured in the air simulated test facility was inconsistent with ground test.
针对某型核心机地面台和高空台试验中空气流量测量不一致的问题,开展了核心机进口流场的数值计算分析和试验研究。
5)  air flowrate
空气流量
1.
Analysis and evaluation of measurement uncertainty of air flowrate with nozzle
喷嘴式空气流量测量不确定度分析与评定
2.
In this paper,the developing situations of domestic and foreign air flowrate measuring technology are discussed,different inspection patterns are com pared and analyzed,and some personal views are put forward.
汽油机进气量的准确计量是其电控喷油系统实现空燃比精密控制的基础,文中系统综述了空气流量测量技术的国内外发展状况,对各种不同流量检测方式进行了对比分析,并提出了见解。
3.
Introduced is the experiment by a differentialthermo-balance for characteristics of coal used for blast furnace injection at programmed rate of temperature elevation and various air flowrate;influence on ignition weight loss and characteristic temperature at different rate of temperature elevation and air supply analyzed.
介绍了利用差热分析天平,采用程序升温法对高炉喷吹煤在不同升温速率和空气流量下的燃烧性能进行的实验,分析了升温速率和空气流量对失重率和燃烧特征温度的影响。
6)  air flow rate
空气流量
1.
For it is difficult to measurement the air flow rate on the medium and large duty marine diesel engines,the emission testing experiments were carried out on small duty marine diesel engines.
鉴于用空气流量法测量大中型船用柴油机废气排放较困难,考虑以小型船用柴油机为对象进行排放测试研究。
2.
Through experiments of changing the inlet air flow rate,we can adjust the hot air outlet temperature as high as possible,which helps to reduce the heat loss and improve the collector efficiency.
通过改变集热管进口空气流量来获得尽可能高出口温度的热空气,从而降低热损系数,提高集热效率。
补充资料:流量测量方法和流量仪表选型
1. 流量测量方法   
流量测量方法大致可以归纳为以下几类: 
(1)利用伯努利方程原理,通过测量流体差压信号来反映流量的差压式流量测量法; 
(2)通过直接测量流体流速来得出流量的速度式流量测量法; 
(3)利用标准小容积来连续测量流量的容积式测量; 
(4)以测量流体质量流量为目的的质量流量测量法。 
  
2. 流量仪表的分类 
   

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按此在新窗口浏览图片

 
3.  流量仪表的主要技术参数 
  
(1)流量范围 
   流量范围指流量计可测的最大流量与最小流量的范围。   
(2)量程和量程比 
   流量范围内最大流量与最小流量值之差称为流量计的量程。最大流量与最小流量的比值称为量程比,亦称流量计的范围度。   
(3)允许误差和精度等级 
   流量仪表在规定的正常工作条件下允许的最大误差,称为该流量仪表的允许误差,一般用最大相对误差和引用误差来表示。  
   流量仪表的精度等级是根据允许误差的大小来划分的,其精度等级有:0.02、0.05、0.1、0.2、0.5、1.0、1.5、2.5等。   
(4)压力损失  
   压力损失的大小是流量仪表选型的一个重要技术指标。压力损失小,流体能消耗小,输运流体的动力要求小,测量成本低。反之则能耗大,经济效益相应降低。故希望流量计的压力损失愈小愈好。 
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