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Industry Information
Doppler ultrasonic flowmeter does not have problems such as media leakage pressure loss
2012-4-10 9:35:16


的测量原别是以物理学中的多普勒效应为基础的。 The measurement of Doppler ultrasonic flowmeter is based on the Doppler effect in physics. According to the acoustic Doppler effect, when there is relative motion between the sound source and the observer, the frequency of the sound perceived by the observer will be different from the frequency emitted by the sound source. This frequency change due to relative motion is directly proportional to the relative speed of the two objects. In the Doppler ultrasonic flow measurement method, the ultrasonic transmitter is a fixed sound source, and the solid particles moving with the fluid play the role of an "observer" that moves relative to the sound source. Of course, it merely enters the solid The ultrasonic waves on the particles are reflected back to the receiving data. The frequency difference between the transmitted sound wave and the received sound wave is the Doppler frequency shift of the sound wave due to the movement of solid particles in the fluid. Since this frequency difference is proportional to the fluid velocity, the velocity can be obtained by measuring the frequency difference. Then the flow rate of the fluid can be obtained. Therefore, a necessary condition for Doppler ultrasonic flow measurement is that the fluid medium to be measured should be a two-phase medium containing a certain number of solid particles or bubbles that can reflect sound waves. This working condition is actually one of its great advantages, that is, this flow measurement method is suitable for the measurement of two-phase flow, which is a difficult problem for other flow meters. Therefore, as a promising two-phase flow measurement method and flow meter, ultrasonic Doppler flow measurement method is being increasingly applied.


是一种耐用的、非接触式测量污水的超声波流量计,从管道外面测量管道内污水的流量,安装时不需要截管或停流,因此没有一般流量计所必须的法兰,也不存在介质泄漏、压力损失等问题。 Doppler ultrasonic flowmeter is a durable, non-contact ultrasonic flowmeter for measuring sewage. It measures the flow of sewage in the pipeline from the outside of the pipeline. There is no need to cut off or stop the flow during installation, so there is no need for general flowmeters. The flange does not have problems such as medium leakage and pressure loss. Doppler ultrasonic flowmeter is mainly used in urban sewage treatment plants, environmental protection testing of drainage pumping stations and urban drainage, industrial wastewater, domestic sewage, mud, pulp, oil and water in mining, oilfield, metallurgy, chemical, oil refining, papermaking, food and other industries Flow measurement of mixed liquids. It is suitable for hard pipes such as steel and hard plastic pipes. It can measure two-phase liquids containing suspended solid particles or bubbles in pipes with various pipe diameters and wall thicknesses. Measurable dirty liquid, solves the problem that time-lag ultrasonic flowmeter cannot measure. Simple operation, high intelligence, fast response. Advanced single-chip microcomputer technology and ultra-large-scale integrated circuit. Password lock protection function to prevent non-operator transfer. Simple operation. , Chinese / English bilingual switch

性能特点:主机显示:中/英文显示,可显示瞬时流量、累积流量、流速等信息 固定式多普勒超声波流量计信号输出:电流信号:4-20mA、带负载能力0~600Ω Doppler ultrasonic flowmeter performance characteristics: host display: Chinese / English display, can display instantaneous flow rate, cumulative flow rate, flow rate and other information Fixed Doppler ultrasonic flowmeter signal output: current signal: 4-20mA, with load capacity 0 ~ 600Ω
Data interface: standard RS-232C or RS-485
Data record: 65,072 data records can be stored (leading domestic technology)
Tube diameter range: Ф25 ~ Ф3048mm
Velocity range: 0.1m / s ~ 10.0m / s
Measurement accuracy: ± 0.5% ~ ± 2% FS
Suspended matter content: ≥100mg / L
Length of straight pipe section: 10D on the upstream side and 5D on the downstream side, 30D from the pump outlet (D: refers to the pipe diameter)
Installation: external binding or plug-in optional working temperature: host -20 ℃ ~ 50 ℃; sensor -40 ℃ ~ 82 ℃
Power supply voltage: AC85 ~ 265V can work, suitable for severe power supply voltage. Relay output: can set upper and lower limit alarms. Dimensions: 240 × 185 × 120mm
Weight: 1.88kg