一、进口超声波流量计概述

进口超声波流量计只需粘贴在管道表面即可完成各种液体的流量测量，与传统流量计相比，它无需断管断流，安装方便快捷，正真实现了无损安装。

工作原理当超声波束在液体中传播时，液体的流动将使传播时间产生微小变化，其传播时间的变化正比于液体的流速。零流量时，两个传感器发射和接收声波所需的时间完全相同（可实际测量零流量的技术），液体流动时，逆流方向的声波传输时间大于顺流方向的声波传输时间。

其关系符合下面表达式：

其中：θ 为声束与液体流动方向的夹角   

M为声束在液体的直线传播次数

D 为管道内径

Tup 为声束在正方向上的传播时间

Tdown 为声束在逆方向上的传播时间  ΔT=Tup –Tdown

二、进口超声波流量计产品特点

（1）高精度测量，线性度优于0.5%，重复性精度优于0.2%，测量精度优于±1%

（2）探头功耗低，安装简便，易定位，广泛应用于与河流，供水，工厂、城市排污管道等相关领域。

（3）测量范围大，选用不同型号的传感器，可以实现口径DN15-DN6000mm管道流量的测量。

（4）支持中文或英文菜单。不同版本的流量计，可支持中文或英文菜单，方便快捷。

（5）可靠性强，采用低电压，多脉冲发射电路测量精度，使用寿命以及可靠性大幅提高。

（6）抗干扰能力强，采用双平衡信号差分发射，接受电路，有效抵御变频器，电视塔，高压线等强干扰源。

（7）强大的记忆能力，自动记忆前64日，前64月，前5年的累计流量，自动记忆前64次来电和断电时间和流量，自动记忆前64日流量计的工作状态是否正常。

（8）内置远程通信模块，可制各种通信协议。（METER-BUS协议，MODBUS协议，富士拓展协议，简易水表协议）

（9）RS232/RS485输出，4-20MA脉冲输出。

(1) High precision measurement, linearity better than 0.5%, repeatability accuracy better than 0.2%, measurement accuracy better than ± 1%

(2) The probe has low power consumption, easy installation, and easy positioning, and is widely used in related fields such as rivers, water supply, factories, and urban sewage pipelines.

(3) The measurement range is large, and different types of sensors can be used to measure the flow rate of pipelines with diameters ranging from DN15 to DN6000mm.

(4) Supports Chinese or English menus. Different versions of flow meters can support Chinese or English menus for convenience and speed.

(5) Strong reliability, using low voltage and multi pulse transmission circuits to significantly improve measurement accuracy, service life, and reliability.

(6) Strong anti-interference ability, using dual balanced signal differential transmission and receiving circuit, effectively resisting strong interference sources such as frequency converters, TV towers, and high-voltage lines.

(7) Powerful memory ability, automatically remembers the cumulative flow of the first 64 days, the first 64 months, and the first 5 years, automatically remembers the time and flow of the first 64 incoming and power outages, and automatically remembers whether the flowmeter's working status is normal for the first 64 days.

(8) Built in remote communication module, capable of producing various communication protocols. (METER-BUS protocol, MODBUS protocol, Fuji extension protocol, simplified water meter protocol)

(9) RS232/RS485 output, 4-20mA pulse output.

三、进口超声波流量计性能参数