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Industry Information
The measurement point of the ultrasonic flowmeter needs to be on a certain length of straight pipe
2012-4-10 8:48:52

基于微处理技术,大多采用集成电路及低电压宽脉冲发射技术而设计的。 Ultrasonic flowmeters are based on micro-processing technology and are mostly designed using integrated circuits and low-voltage wide-pulse emission technology. In terms of measurement technology, in order to achieve higher resolution and larger measurement range, 0.1ns ultra-high-resolution time measurement lines are often used. It is specially used for the measurement of liquid media, especially for water. Its significant features are: accuracy level is ± 1.0%, can be installed under pressure without stopping production, the host can be installed in the value control room and can also output current, pulse and other standard signals and can use RS232 or RS485 interface communication for remote measurement data Send. The flowmeter has the advantages of high reliability, low power consumption, anti-interference, and convenient installation and maintenance.

的基本构造与主要安装方式:1、超声波流量计的构造,超声波流量计一般可分现场传感器(即探头),传输电缆,显示主机三大部分。 The basic structure and main installation methods of the ultrasonic flowmeter: 1. The structure of the ultrasonic flowmeter. Generally, the ultrasonic flowmeter can be divided into three parts: the field sensor (ie, the probe), the transmission cable, and the display host. Its sensors are clip-on, plug-in, and French-blue (ie, tube-type). The display host is fixed and portable. The portable host can be equipped with a clip-on sensor to compare ultrasonic flow meters that are fixed online (on-site calibration) ) And the installation is very simple. 2. Determination of measurement points for ultrasonic flowmeters. An ultrasonic flowmeter must first select a suitable measurement point, then enter the water pipe parameters of the measurement points into the flowmeter, and finally install the sensor (ie the probe) on the water pipe. 一般 General requirements for measurement points, and measurement points for ultrasonic flowmeters must be on a straight pipe section of a certain length, that is, a pipe section with uniform water flow distribution is selected to reduce measurement errors. ⑴Selection principle of measuring points⑴Should choose a uniform straight pipe section 10 times the pipe diameter length from the upstream (water flow direction) and 5 times the pipe diameter length from the downstream (water flow direction) , Or the inflection point of the pipe is outside this length). 材质 The material of the straight pipe section should be uniform and free of scars and cracks to facilitate ultrasonic transmission. (3) The inner wall of the straight pipe section should be free of scale (if slightly scale is available, it can be blown with steam or high pressure water). 直 The straight pipe section should be filled with water (whether vertical or horizontal pipe section). 3. The classification and main installation methods of ultrasonic flowmeter sensors. The installation quality of ultrasonic flowmeter sensors is directly related to the accuracy, credibility and operational reliability of water flow measurement.

是当今世界上具竞争力的流量测量手段,其测量线精度高于1.0%。 Ultrasonic flowmeter is a competitive flow measurement method in the world today, and its measurement line accuracy is higher than 1.0%. Due to the diversity of the industrial site, especially the environment around the pipeline, how to install and debug the ultrasonic flowmeter according to the specific environment has become an important topic in the field of ultrasonic flow measurement. It further fully reflects the advantages of accuracy, reliability and stability of the ultrasonic flowmeter, greatly reducing future maintenance work and even maintenance-free. Ultrasonic flowmeter installation steps: (1) Observe whether the pipeline at the installation site meets the first 10d and 5d after the straight pipe section and the distance from the pump 30d (d is the inner diameter of the pipeline). (2) Confirm the fluid medium in the pipeline and whether it is full. (3) Confirm the pipe material and wall thickness. (4) After the first three steps are completed, you can confirm which sensor is used for installation. (5) After selecting the sensor, start to input parameters to the meter body to determine the installation distance. (6) Measure the installation distance accurately.