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The difference between ultrasonic flowmeters
2011-9-5 17:01:29

  由于 换能器供电方式 发的 不同,可以分为外贴式、插入式、管段式三种超声波流量计 First , due to the different power supply methods of the transducer , it can be divided into three types: external type, plug-in type and tube type.
(1) External type
应用最广泛的超声波流量计,安装换能器 管道断流,它充分体现了超声波流量计安装简单、使用方便的特点。 External-type ultrasonic flowmeter is the earliest production, the most familiar and most widely used ultrasonic flowmeter. The installation of the transducer does not require pipe interruption, which fully reflects the characteristics of simple installation and convenient use of the ultrasonic flowmeter.
(2) Pipe type
由于 材质疏 导声不良,或者锈蚀严重,衬里和管道内空间有间隙等原因, 容易 导致超声波信号衰减 现象 严重, 因此 用外贴式超声波流量计无法正常 测量,所以产生了管段式超声波流量计。 Due to sparse materials , poor sound guidance, or severe corrosion, there is a gap between the lining and the internal space of the pipeline, which can easily cause the attenuation of the ultrasonic signal . Therefore , the external ultrasonic flowmeter cannot measure normally , so a tube-type ultrasonic wave is generated. Flow meter.
超声波流量计要高,但 缺点是 要求切开管道安装换能器。 The tube-type ultrasonic flowmeter integrates the transducer and the measuring tube into one body. The measurement accuracy is higher than other ultrasonic flowmeters, but the disadvantage is that it requires cutting the pipeline to install the transducer.
(3) Plug-in
外贴式与管道式 二者中间。 The plug-in ultrasonic flowmeter is between the external type and the pipeline type . Use special tools to punch holes in the water pipeline, the installation can flow continuously, insert the transducer into the pipeline to complete the installation. 信号的发射、接受只经过被测介质,而不经过管壁和衬里,所以其测量不受管质和管衬材料限制。 Because the transducer is in the pipeline, its signal transmission and reception only pass through the measured medium, not through the pipe wall and lining, so its measurement is not limited by the quality of the pipe and lining material.

根据使用场合不同,超声波流量计可以分为固定式超声波流量计便携式超声波流量计 Second , according to different applications, ultrasonic flowmeters can be divided into fixed ultrasonic flowmeters and portable ultrasonic flowmeters .
(1) Different applications
安装在某一固定 位置,对某一特定管道内流体的流量进行长期不间断的计量; 便携式超声波流量计 具有很大的机动性, 可以 用于对不同管道的流体流量作临时性测量。 A fixed ultrasonic flowmeter is installed in a fixed position to measure the flow of fluid in a specific pipeline for a long time without interruption; while a portable ultrasonic flowmeter has great mobility and can be used for different pipelines. Fluid flow is temporarily measured.
(2) Different power supply methods
     固定式超声波流量计 要求长期连续运行,所以 需要 使用220V交流或 24V直流电源, 便携式超声波流量计 既可以使用现场的交流电源, 同时 可以使用 内置充电电池,可以连续工作5~10h,方便了 不同场合临时性流量测量的需要。 Because the fixed ultrasonic flowmeter requires continuous operation for a long time, it needs to use 220V AC or 24V DC power supply, while the portable ultrasonic flowmeter can use the on-site AC power supply and the built-in rechargeable battery, which can work continuously for 5-10 hours. It facilitates the need for temporary flow measurement in different occasions.
(3) Some functions are different
     定式超声波流量计,通常都有4-20mA信号输出等功能, 可以 供远传显示使用,但 是缺点是它的 内部只能存贮一条管道的参数;便携式超声波流量计 一般 是为了现场查看当时流量和短时间内的累计流量, 所以 一般 没有 输出信号功能,但为了方便测量不同管道流量,它具有丰富的贮存功能,可以同时存贮数十条不同管道的参数,供随时调出使用。 Fixed ultrasonic flowmeters usually have functions such as 4-20mA signal output, which can be used for remote display display, but the disadvantage is that it can only store the parameters of one pipe; portable ultrasonic flowmeters are generally used to view the scene at the time The flow rate and the accumulated flow rate in a short time, so there is generally no output signal function, but in order to facilitate the measurement of different pipeline flow rates, it has a rich storage function, which can simultaneously store the parameters of dozens of different pipelines for recall at any time.
超声波流量计 的选型 Selection of Ultrasonic Flowmeter
上述各种类型超声波流量计外,近年来数字化电路的数字式超声波流量 ,把换能器和转换器做在一起的一体式超声波流量计等等 的出现 In addition to the above-mentioned various types of ultrasonic flowmeters, in recent years, digital ultrasonic flowmeters with digital circuits, integrated ultrasonic flowmeters with transducers and converters, and the like have appeared . ,要根据实际情况和测量需要合理选型。 When users face many types of ultrasonic flowmeters , they must select a reasonable type according to the actual situation and measurement needs.