WO2017004887A1 - Method and apparatus for measuring time-difference-type ultrasonic flow - Google Patents

Method and apparatus for measuring time-difference-type ultrasonic flow Download PDF

Info

Publication number
WO2017004887A1
WO2017004887A1 PCT/CN2015/089218 CN2015089218W WO2017004887A1 WO 2017004887 A1 WO2017004887 A1 WO 2017004887A1 CN 2015089218 W CN2015089218 W CN 2015089218W WO 2017004887 A1 WO2017004887 A1 WO 2017004887A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
time difference
ultrasonic
flow rate
ultrasonic sensor
Prior art date
Application number
PCT/CN2015/089218
Other languages
French (fr)
Chinese (zh)
Inventor
郭楚文
王信用
王凤超
Original Assignee
中国矿业大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to ZA2016/04937A priority Critical patent/ZA201604937B/en
Publication of WO2017004887A1 publication Critical patent/WO2017004887A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters

Definitions

  • the invention relates to a flow measuring method and device, in particular to a time difference ultrasonic flow measuring method and device.
  • the time difference method ultrasonic flowmeter determines the flow velocity of the measured fluid by measuring the difference of the propagation time of the ultrasonic wave with the countercurrent and the downstream flow.
  • the information of the fluid flow velocity is loaded, and the time difference of the ultrasonic wave received can be The flow rate of the fluid is detected and converted to flow.
  • the time difference method ultrasonic flowmeter assumes that the fluid flow velocity of the ultrasonic beam in the propagation path is uniform, and in fact the velocity distribution of the fluid is related to the flow state, and the velocity distribution on the cross section of the circular tube in the laminar flow is a paraboloid of rotation.
  • the turbulent flow the velocity distribution on the cross section of the circular tube is a boss type, which inevitably causes a large measurement error.
  • the object of the present invention is to provide a time difference type ultrasonic flow measuring method and device with simple device, convenient implementation and high measuring precision, and solve the problem that the current time difference ultrasonic flow meter does not consider the error caused by non-uniform velocity distribution.
  • the object of the invention is achieved in that the flow measurement method is as follows:
  • the propagation time difference of the ultrasonic beam along the forward and reverse flow is:
  • R is the radius of the pipe to be tested;
  • u m is the maximum flow velocity of the pipe axis;
  • ⁇ is the angle between the ultrasonic beam and the direction of fluid flow;
  • c is the propagation velocity of the ultrasonic wave in the fluid to be measured;
  • the flow rate during laminar flow is:
  • the coefficient K is taken as 1, 2, 4 respectively;
  • the ultrasonic propagation time difference is calculated according to the average velocity, and the measured flow rate is:
  • n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number
  • the flow measuring device comprises: a measuring pipe segment, a main single chip microcomputer, a transmitting circuit, a downstream ultrasonic sensor, an upstream ultrasonic sensor, a first receiving processing circuit, a second receiving processing circuit, a time difference measuring, a clock, a memory, a keyboard and an LCD display; and a downstream ultrasonic sensor
  • the upstream ultrasonic sensors are respectively connected to the measured pipe section, and the output end of the downstream ultrasonic sensor is connected to the input end of the time difference measurement through the first receiving processing circuit, and the output end of the upstream ultrasonic sensor passes through the input end of the second receiving processing circuit and the time difference measuring.
  • the output of the time difference measurement is bidirectionally connected with the main MCU; the clock, the memory, the keyboard and the LCD display are all connected with the main MCU, the output end of the main MCU is connected with the input end of the transmitting circuit, and the output end of the transmitting circuit is respectively connected with the downstream ultrasonic wave.
  • the sensor is connected to the output of the upstream ultrasonic sensor.
  • the transmitting circuit After the main MCU issues the measurement command, the transmitting circuit generates a certain waveform, first clears the counter, then synchronously starts the transmitting circuit to trigger the ultrasonic transducer to transmit the ultrasonic pulse, and uses the downstream ultrasonic sensor, the upstream ultrasonic sensor, the first receiving processing circuit, and the first
  • the second receiving processing circuit and the time difference measurement can obtain the downstream propagation time and the reverse current propagation time of the ultrasonic wave; the main single chip microcomputer uses the digital filtering count to filter the time signals, and calculates the corresponding flow rate and flow rate according to the actual situation, and saves to the memory. Medium and sent to the LCD display for display.
  • the main microcontroller uses an integration algorithm to calculate the flow rate and flow rate.
  • the flow rate obtained by the method according to the present invention is much more accurate when assuming that the flow velocity on the ultrasonic propagation path is uniform will result in a large measurement error.
  • the correction coefficient for different flow states is obtained by theoretical derivation calculation. And design a set of devices to achieve time difference method ultrasonic flow measurement. The problem that the current time difference type ultrasonic flowmeter does not consider the unevenness of the speed distribution is solved.
  • the method is reliable in theory, simple in device, reliable in method, convenient in implementation, high in measurement accuracy, and can improve the measurement result by 5% to 33% compared with the existing time difference ultrasonic flow measurement result, suitable for all measurement based on propagation time difference Ultrasonic flow meter for flow.
  • Fig. 1 is a view showing the arrangement of an ultrasonic sensor according to the Z-shape of the present invention.
  • FIG. 2 is a view showing a structure of an ultrasonic sensor according to the present invention in a V-shaped arrangement.
  • Fig. 3 is a view showing the arrangement of the ultrasonic sensor according to the W type of the present invention.
  • Embodiment 1 The flow measurement method is as follows:
  • the propagation time difference of the ultrasonic beam along the forward and reverse flow is:
  • R is the radius of the pipe to be tested;
  • u m is the maximum flow velocity of the pipe axis;
  • ⁇ is the angle between the ultrasonic beam and the direction of fluid flow;
  • c is the propagation velocity of the ultrasonic wave in the fluid to be measured;
  • the flow rate during laminar flow is:
  • the coefficient K is taken as 1, 2, 4 respectively;
  • the ultrasonic propagation time difference is calculated according to the average speed, and the measured flow rate is:
  • the laminar flow rate measured by the existing time difference type ultrasonic flowmeter is 1.33 times the flow rate measured by the method of the present invention, and the error is obvious.
  • n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number
  • the empirical index n of the turbulent velocity distribution is generally 4 to 10, and the turbulent flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 1.05 times the flow rate measured by the method of the present invention, and the error is obvious.
  • the flow measuring device comprises: a measured pipe segment 1, a main single chip 2, a transmitting circuit 3, a downstream ultrasonic sensor 4, an upstream ultrasonic sensor 5, a first receiving processing circuit 6, a second receiving processing circuit 7, a time difference measuring 8, a clock 9, a memory 10.
  • the keyboard 11 and the LCD display 12; the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5 are respectively connected to the measured pipe section 1, and the output end of the downstream ultrasonic sensor 4 is connected to the input end of the time difference measurement 8 through the first receiving processing circuit 6.
  • the output end of the upstream ultrasonic sensor 5 is connected to the input end of the time difference measurement 8 through the second receiving processing circuit 7; the output end of the time difference measuring 8 is bidirectionally connected to the main MCU 2; the clock 9, the memory 10, the keyboard 11 and the LCD display 12 are both Connected to the main microcontroller 2, the output of the main microcontroller 2 is connected to the input of the transmitting circuit 3, and the output of the transmitting circuit 3 is connected to the output of the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5, respectively.
  • the transmitting circuit 3 After the main MCU 2 issues a measurement command, the transmitting circuit 3 generates a certain waveform, first clears the counter, and then synchronously activates the transmitting circuit 3 to trigger the ultrasonic transducer to transmit an ultrasonic pulse, and uses the downstream ultrasonic sensor 4, the upstream ultrasonic sensor 5, and the first
  • the receiving processing circuit 6, the second receiving processing circuit 7 and the time difference measuring 8 can obtain the downstream propagation time and the reverse current propagation time of the ultrasonic wave; the main single chip microcomputer 2 filters the time signals by digital filtering, and calculates according to the actual situation.
  • the corresponding flow rate and flow rate are saved to memory 10 and sent to LCD display 12 for display.
  • the main microcontroller 2 uses an integration algorithm to calculate the flow rate and flow rate.
  • a Z-shaped arrangement will be described as an example.
  • the ultrasonic sensor is arranged in a Z-shape such that the downstream ultrasonic sensor 4 is located on the lower side, and the upstream ultrasonic sensor 5 is located on the upper side of the front end of the downstream ultrasonic sensor 4.
  • the flow measuring device includes: a measured pipe segment 1, a main single chip 2, a transmitting circuit 3, a downstream ultrasonic sensor 4, an upstream ultrasonic sensor 5, a first receiving processing circuit 6, a second receiving processing circuit 7, and a time difference measurement.
  • the clock 9, the memory 10, the keyboard 11 and the LCD display 12; the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5 are respectively connected to the measured pipe section 1, and the output end of the downstream ultrasonic sensor 4 passes the first receiving processing circuit 6 and the time difference measurement.
  • the input end of the upstream ultrasonic sensor 5 is connected to the input end of the time difference measurement 8 through the second receiving processing circuit 7; the output end of the time difference measuring 8 is bidirectionally connected with the main single chip 2; the clock 9, the memory 10, the keyboard 11 and the LCD display 12 are both connected to the main single chip 2, the output end of the main single chip 2 is connected to the input end of the transmitting circuit 3, and the output end of the transmitting circuit 3 is connected to the output ends of the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5, respectively.
  • the transmitting circuit 3 After the main MCU 2 issues a measurement command, the transmitting circuit 3 generates a certain waveform, first clears the counter, then synchronously starts the transmitting circuit 3 to trigger the ultrasonic transducer to transmit an ultrasonic pulse, and uses the downstream ultrasonic sensor 4, the upstream ultrasonic sensor 5, and the receiving process.
  • the circuit I 6, the reception processing circuit II 7 and the time difference measurement 8 can obtain the downstream propagation time and the counter current propagation time of the ultrasonic wave.
  • the main MCU 2 filters the time signals by digital filtering, and calculates the corresponding flow rate and flow rate according to the actual situation, saves them in the memory 10, and sends them to the LCD display 12 for display.
  • the main microcontroller 2 uses an integration algorithm to calculate the flow rate and flow rate.
  • the ultrasonic wave propagates in a forward or countercurrent flow, its propagation speed is equal to the hydrostatic sound velocity plus or minus the fluid flow velocity. Therefore, when an ultrasonic wave is emitted from a sensor, it will traverse a flow layer of different flow rates, that is, the speed of the ultrasonic wave during propagation varies. In order to accurately measure the downstream propagation time of the ultrasonic wave and the countercurrent propagation time difference, an integral method must be used. The propagation time difference of the ultrasonic beam along the forward and reverse flows is obtained by the following integration:
  • R is the radius of the pipe to be tested;
  • u is the flow velocity distribution inside the pipe;
  • ⁇ is the angle between the ultrasonic beam and the direction of fluid flow;
  • c is the propagation velocity of the ultrasonic wave in the fluid to be measured.
  • the velocity profile across the cross section of the tube is:
  • u m is the maximum flow rate of the pipe axis.
  • the flow rate of the Z-type installation mode during laminar flow is:
  • the ultrasonic propagation time difference is calculated according to the average speed, and the measured flow rate is:
  • the laminar flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 0.39 times the flow rate measured by the method of the present invention, and the error is obvious.
  • n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number.
  • the empirical index n of the turbulent velocity distribution is generally 4 to 10, and the turbulent flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 1.05 times the flow rate measured by the method of the present invention, and the error is obvious.
  • Embodiment 2 In Fig. 2, the ultrasonic sensor is arranged in a V-shape, the downstream ultrasonic sensor 4 is on the same side as the upstream ultrasonic sensor 5, and the downstream ultrasonic sensor 4 is located on the lower side of the upstream ultrasonic sensor 5; the other is the same as in the first embodiment.
  • FIG. 3 is a structural diagram of a W-shaped arrangement of an ultrasonic sensor according to the present invention.
  • the downstream ultrasonic sensor 4 is on the same side as the upstream ultrasonic sensor 5, and the downstream ultrasonic sensor 4 is located on the lower two V-shaped distances of the upstream ultrasonic sensor 5; the other is the same as in the first embodiment.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A method for measuring a time-difference-type ultrasonic flow, comprising: acquiring a propagation time difference of an ultrasonic beam along a fair current and a counter current; when a measured flow is a laminar flow, substituting laminar flow speed distribution into a formula for integration to obtain a time difference and to obtain a flow of the laminar flow; calculating an ultrasonic propagation time difference according to an average speed without considering the non-uniformity of the speed distribution, so as to obtain the measured flow; when the measured flow is a turbulent flow, substituting turbulent flow speed distribution into the formula for integration to obtain a time difference; obtaining a flow of the turbulent flow; and obtaining a flow without considering the non-uniformity of the speed distribution. Further provided is an apparatus for measuring a time-difference-type ultrasonic flow.

Description

一种时差式超声波流量测量方法及装置Time difference type ultrasonic flow measuring method and device 技术领域Technical field
本发明涉及一种流量测量方法及装置，特别是一种时差式超声波流量测量方法及装置。The invention relates to a flow measuring method and device, in particular to a time difference ultrasonic flow measuring method and device.
背景技术Background technique
时差法超声流量计是通过测量超声波随逆流与顺流的传播时间差来确定被测流体的流速，超声波在流动的流体中传播时就载上了流体流速的信息，通过接收到的超声波时间差就可以检测出流体的流速，并换算成流量。目前，时差法超声波流量计都假设超声波束在传播路径上的流体流动速度是均匀的，而实际上流体的速度分布与流态有关，层流时圆管横截面上的速度分布为旋转抛物型，紊流时圆管横截面上的速度分布为凸台型，因此必然造成较大的测量误差。The time difference method ultrasonic flowmeter determines the flow velocity of the measured fluid by measuring the difference of the propagation time of the ultrasonic wave with the countercurrent and the downstream flow. When the ultrasonic wave propagates in the flowing fluid, the information of the fluid flow velocity is loaded, and the time difference of the ultrasonic wave received can be The flow rate of the fluid is detected and converted to flow. At present, the time difference method ultrasonic flowmeter assumes that the fluid flow velocity of the ultrasonic beam in the propagation path is uniform, and in fact the velocity distribution of the fluid is related to the flow state, and the velocity distribution on the cross section of the circular tube in the laminar flow is a paraboloid of rotation. When the turbulent flow, the velocity distribution on the cross section of the circular tube is a boss type, which inevitably causes a large measurement error.
发明内容Summary of the invention
本发明的目的是要提供一种装置简单，实现方便，测量精度高的时差式超声波流量测量方法及装置，解决目前时差式超声波流量计不考虑速度分布非均匀造成的误差问题。The object of the present invention is to provide a time difference type ultrasonic flow measuring method and device with simple device, convenient implementation and high measuring precision, and solve the problem that the current time difference ultrasonic flow meter does not consider the error caused by non-uniform velocity distribution.
本发明的目的是这样实现的：该流量测量方法如下：The object of the invention is achieved in that the flow measurement method is as follows:
超声波束沿顺流和逆流的传播时间差为：The propagation time difference of the ultrasonic beam along the forward and reverse flow is:
Figure PCTCN2015089218-appb-000001
Figure PCTCN2015089218-appb-000001
当被测流动为层流时，将层流速度分布代入(1)式，积分得时间差为：When the measured flow is laminar, the laminar velocity distribution is substituted into equation (1), and the time difference is:
Figure PCTCN2015089218-appb-000002
Figure PCTCN2015089218-appb-000002
其中，R为被测管道的半径；um为管道轴线最大流速；θ为超声波束与流体流动方向的夹角；c为超声波在被测流体中的传播速度；Where R is the radius of the pipe to be tested; u m is the maximum flow velocity of the pipe axis; θ is the angle between the ultrasonic beam and the direction of fluid flow; c is the propagation velocity of the ultrasonic wave in the fluid to be measured;
则层流时的流量为：The flow rate during laminar flow is:
Figure PCTCN2015089218-appb-000003
Figure PCTCN2015089218-appb-000003
其中，对Z型、V型、W型三种不同的安装方式，系数K分别取1、2、4；Among them, for the three different installation modes of Z-type, V-type and W-type, the coefficient K is taken as 1, 2, 4 respectively;
不考虑速度分布的非均匀性，按照平均速度计算超声波传播时间差，则所测量的流量为：Regardless of the non-uniformity of the velocity distribution, the ultrasonic propagation time difference is calculated according to the average velocity, and the measured flow rate is:
Figure PCTCN2015089218-appb-000004
Figure PCTCN2015089218-appb-000004
显然有： Obviously there are:
Figure PCTCN2015089218-appb-000005
Figure PCTCN2015089218-appb-000005
当被测流动为紊流时，将紊流速度分布代入(1)式，积分得时间差为：When the measured flow is turbulent, the turbulent velocity distribution is substituted into equation (1), and the time difference is:
Figure PCTCN2015089218-appb-000006
Figure PCTCN2015089218-appb-000006
其中，n为紊流速度分布的经验指数，一般随雷诺数的增大而增大；Where n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number;
则紊流时的流量为Then the flow rate during turbulence is
Figure PCTCN2015089218-appb-000007
Figure PCTCN2015089218-appb-000007
而不考虑速度分布的不均匀性得到的流量为：The flow obtained without considering the unevenness of the velocity distribution is:
Figure PCTCN2015089218-appb-000008
Figure PCTCN2015089218-appb-000008
则有Then there is
Figure PCTCN2015089218-appb-000009
Figure PCTCN2015089218-appb-000009
流量测量装置包括：被测量管段、主单片机、发射电路、下游超声波传感器、上游超声波传感器、第一接收处理电路、第二接收处理电路、时差测量、时钟、存储器、键盘和LCD显示；下游超声波传感器、上游超声波传感器分别连接在被测量管段上、下游超声波传感器的输出端通过第一接收处理电路与时差测量的输入端连接，上游超声波传感器的输出端通过第二接收处理电路与时差测量的输入端连接；时差测量的输出端与主单片机双向通讯连接；时钟、存储器、键盘和LCD显示均与主单片机连接，主单片机的输出端与发射电路的输入端连接，发射电路的输出端分别与下游超声波传感器和上游超声波传感器的输出端连接。The flow measuring device comprises: a measuring pipe segment, a main single chip microcomputer, a transmitting circuit, a downstream ultrasonic sensor, an upstream ultrasonic sensor, a first receiving processing circuit, a second receiving processing circuit, a time difference measuring, a clock, a memory, a keyboard and an LCD display; and a downstream ultrasonic sensor The upstream ultrasonic sensors are respectively connected to the measured pipe section, and the output end of the downstream ultrasonic sensor is connected to the input end of the time difference measurement through the first receiving processing circuit, and the output end of the upstream ultrasonic sensor passes through the input end of the second receiving processing circuit and the time difference measuring. Connection; the output of the time difference measurement is bidirectionally connected with the main MCU; the clock, the memory, the keyboard and the LCD display are all connected with the main MCU, the output end of the main MCU is connected with the input end of the transmitting circuit, and the output end of the transmitting circuit is respectively connected with the downstream ultrasonic wave. The sensor is connected to the output of the upstream ultrasonic sensor.
主单片机发出测量命令后，发射电路产生一定的波形，先对计数器清零，接着同步启动发射电路触发超声波换能器发射超声波脉冲，利用下游超声波传感器、上游超声波传感器、第一接收处理电路、第二接收处理电路和时差测量，可以得到超声波的顺流传播时间和逆流传播时间；主单片机采用数字滤波计数对这些时间信号进行滤波处理，并根据实际情况计算出相应的流速和流量，保存到存储器中，并送到LCD显示上显示出来。After the main MCU issues the measurement command, the transmitting circuit generates a certain waveform, first clears the counter, then synchronously starts the transmitting circuit to trigger the ultrasonic transducer to transmit the ultrasonic pulse, and uses the downstream ultrasonic sensor, the upstream ultrasonic sensor, the first receiving processing circuit, and the first The second receiving processing circuit and the time difference measurement can obtain the downstream propagation time and the reverse current propagation time of the ultrasonic wave; the main single chip microcomputer uses the digital filtering count to filter the time signals, and calculates the corresponding flow rate and flow rate according to the actual situation, and saves to the memory. Medium and sent to the LCD display for display.
针对被测管道内的流动状态和横截面上的速度分布类型，主单片机采用积分算法计算出流速和流量。For the flow state in the pipeline to be tested and the type of velocity distribution on the cross section, the main microcontroller uses an integration algorithm to calculate the flow rate and flow rate.
有益效果，由于采用了上述方案，当将超声波传播路径上的流动速度假设为均匀的将产生较大的测量误差，按照本发明的方法得出的流量则精确得多。为了消除由于速度分布不均匀造成的测量误差，通过理论推导计算，得出针对不同流动状态的修正系数， 并设计一套装置，实现时差法超声流量测量。解决了目前时差式超声波流量计不考虑速度分布非均匀造成的误差问题。[Advantageous Effects] Since the above scheme is employed, the flow rate obtained by the method according to the present invention is much more accurate when assuming that the flow velocity on the ultrasonic propagation path is uniform will result in a large measurement error. In order to eliminate the measurement error caused by the uneven velocity distribution, the correction coefficient for different flow states is obtained by theoretical derivation calculation. And design a set of devices to achieve time difference method ultrasonic flow measurement. The problem that the current time difference type ultrasonic flowmeter does not consider the unevenness of the speed distribution is solved.
优点：该方法理论可靠，装置简单，方法可靠，实现方便，测量精度高，与现有的时差式超声波流量测量结果相比，可使测量结果提高5％～33％，适合一切基于传播时间差测量流量的超声波流量计。Advantages: The method is reliable in theory, simple in device, reliable in method, convenient in implementation, high in measurement accuracy, and can improve the measurement result by 5% to 33% compared with the existing time difference ultrasonic flow measurement result, suitable for all measurement based on propagation time difference Ultrasonic flow meter for flow.
附图说明：BRIEF DESCRIPTION OF THE DRAWINGS:
图1为本发明超声波传感器按Z型布置结构图。Fig. 1 is a view showing the arrangement of an ultrasonic sensor according to the Z-shape of the present invention.
图2为本发明超声波传感器按V型布置结构图。2 is a view showing a structure of an ultrasonic sensor according to the present invention in a V-shaped arrangement.
图3为本发明超声波传感器按W型布置结构图。Fig. 3 is a view showing the arrangement of the ultrasonic sensor according to the W type of the present invention.
具体实施方式detailed description
下面结合附图和具体实施对本发明作进一步说明。The present invention will be further described below in conjunction with the drawings and specific embodiments.
实施例1：该流量测量方法如下：Embodiment 1: The flow measurement method is as follows:
超声波束沿顺流和逆流的传播时间差为：The propagation time difference of the ultrasonic beam along the forward and reverse flow is:
Figure PCTCN2015089218-appb-000010
Figure PCTCN2015089218-appb-000010
当被测流动为层流时，将层流速度分布代入(1)式，积分得时间差为：When the measured flow is laminar, the laminar velocity distribution is substituted into equation (1), and the time difference is:
Figure PCTCN2015089218-appb-000011
Figure PCTCN2015089218-appb-000011
其中，R为被测管道的半径；um为管道轴线最大流速；θ为超声波束与流体流动方向的夹角；c为超声波在被测流体中的传播速度；Where R is the radius of the pipe to be tested; u m is the maximum flow velocity of the pipe axis; θ is the angle between the ultrasonic beam and the direction of fluid flow; c is the propagation velocity of the ultrasonic wave in the fluid to be measured;
则层流时的流量为：The flow rate during laminar flow is:
Figure PCTCN2015089218-appb-000012
Figure PCTCN2015089218-appb-000012
其中，对Z型、V型、W型三种不同的安装方式，系数K分别取1、2、4；Among them, for the three different installation modes of Z-type, V-type and W-type, the coefficient K is taken as 1, 2, 4 respectively;
不考虑速度分布的不均匀性，按照平均速度计算超声波传播时间差，则所测量的流量为：Regardless of the unevenness of the velocity distribution, the ultrasonic propagation time difference is calculated according to the average speed, and the measured flow rate is:
Figure PCTCN2015089218-appb-000013
Figure PCTCN2015089218-appb-000013
显然有：Obviously there are:
Figure PCTCN2015089218-appb-000014
Figure PCTCN2015089218-appb-000014
现有时差式超声波流量计所测得的层流流量为按本发明方法测量流量的1.33倍，其误差显而易见。 The laminar flow rate measured by the existing time difference type ultrasonic flowmeter is 1.33 times the flow rate measured by the method of the present invention, and the error is obvious.
当被测流动为紊流时，将紊流速度分布代入(1)式，积分得时间差为：When the measured flow is turbulent, the turbulent velocity distribution is substituted into equation (1), and the time difference is:
Figure PCTCN2015089218-appb-000015
Figure PCTCN2015089218-appb-000015
其中，n为紊流速度分布的经验指数，一般随雷诺数的增大而增大；Where n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number;
则紊流时的流量为Then the flow rate during turbulence is
Figure PCTCN2015089218-appb-000016
Figure PCTCN2015089218-appb-000016
而不考虑速度分布的不均匀性得到的流量为：The flow obtained without considering the unevenness of the velocity distribution is:
Figure PCTCN2015089218-appb-000017
Figure PCTCN2015089218-appb-000017
则有Then there is
Figure PCTCN2015089218-appb-000018
Figure PCTCN2015089218-appb-000018
紊流速度分布的经验指数n一般为4～10，则现有时差式超声波流量计所测得的紊流流量为按本发明方法测量流量的1.16～1.05倍，其误差显而易见。The empirical index n of the turbulent velocity distribution is generally 4 to 10, and the turbulent flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 1.05 times the flow rate measured by the method of the present invention, and the error is obvious.
流量测量装置包括：被测量管段1、主单片机2、发射电路3、下游超声波传感器4、上游超声波传感器5、第一接收处理电路6、第二接收处理电路7、时差测量8、时钟9、存储器10、键盘11和LCD显示12；下游超声波传感器4、上游超声波传感器5分别连接在被测量管段1上、下游超声波传感器4的输出端通过第一接收处理电路6与时差测量8的输入端连接，上游超声波传感器5的输出端通过第二接收处理电路7与时差测量8的输入端连接；时差测量8的输出端与主单片机2双向通讯连接；时钟9、存储器10、键盘11和LCD显示12均与主单片机2连接，主单片机2的输出端与发射电路3的输入端连接，发射电路3的输出端分别与下游超声波传感器4和上游超声波传感器5的输出端连接。The flow measuring device comprises: a measured pipe segment 1, a main single chip 2, a transmitting circuit 3, a downstream ultrasonic sensor 4, an upstream ultrasonic sensor 5, a first receiving processing circuit 6, a second receiving processing circuit 7, a time difference measuring 8, a clock 9, a memory 10. The keyboard 11 and the LCD display 12; the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5 are respectively connected to the measured pipe section 1, and the output end of the downstream ultrasonic sensor 4 is connected to the input end of the time difference measurement 8 through the first receiving processing circuit 6. The output end of the upstream ultrasonic sensor 5 is connected to the input end of the time difference measurement 8 through the second receiving processing circuit 7; the output end of the time difference measuring 8 is bidirectionally connected to the main MCU 2; the clock 9, the memory 10, the keyboard 11 and the LCD display 12 are both Connected to the main microcontroller 2, the output of the main microcontroller 2 is connected to the input of the transmitting circuit 3, and the output of the transmitting circuit 3 is connected to the output of the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5, respectively.
主单片机2发出测量命令后，发射电路3产生一定的波形，先对计数器清零，接着同步启动发射电路3触发超声波换能器发射超声波脉冲，利用下游超声波传感器4、上游超声波传感器5、第一接收处理电路6、第二接收处理电路7和时差测量8，可以得到超声波的顺流传播时间和逆流传播时间；主单片机2采用数字滤波计数对这些时间信号进行滤波处理，并根据实际情况计算出相应的流速和流量，保存到存储器10中，并送到LCD显示12上显示出来。After the main MCU 2 issues a measurement command, the transmitting circuit 3 generates a certain waveform, first clears the counter, and then synchronously activates the transmitting circuit 3 to trigger the ultrasonic transducer to transmit an ultrasonic pulse, and uses the downstream ultrasonic sensor 4, the upstream ultrasonic sensor 5, and the first The receiving processing circuit 6, the second receiving processing circuit 7 and the time difference measuring 8 can obtain the downstream propagation time and the reverse current propagation time of the ultrasonic wave; the main single chip microcomputer 2 filters the time signals by digital filtering, and calculates according to the actual situation. The corresponding flow rate and flow rate are saved to memory 10 and sent to LCD display 12 for display.
针对被测管道内的流动状态和横截面上的速度分布类型，主单片机2采用积分算法计算出流速和流量。For the flow state in the pipeline to be tested and the type of velocity distribution on the cross section, the main microcontroller 2 uses an integration algorithm to calculate the flow rate and flow rate.
具体的： specific:
图1中、以Z型布置为例进行说明。所述的超声波传感器按Z型布置结构为：下游超声波传感器4位于下侧，上游超声波传感器5位于下游超声波传感器4前端的上侧。In Fig. 1, a Z-shaped arrangement will be described as an example. The ultrasonic sensor is arranged in a Z-shape such that the downstream ultrasonic sensor 4 is located on the lower side, and the upstream ultrasonic sensor 5 is located on the upper side of the front end of the downstream ultrasonic sensor 4.
如图1所示，流量测量装置包括：被测量管段1、主单片机2、发射电路3、下游超声波传感器4、上游超声波传感器5、第一接收处理电路6、第二接收处理电路7、时差测量8、时钟9、存储器10、键盘11和LCD显示12；下游超声波传感器4、上游超声波传感器5分别连接在被测量管段1上、下游超声波传感器4的输出端通过第一接收处理电路6与时差测量8的输入端连接，上游超声波传感器5的输出端通过第二接收处理电路7与时差测量8的输入端连接；时差测量8的输出端与主单片机2双向通讯连接；时钟9、存储器10、键盘11和LCD显示12均与主单片机2连接，主单片机2的输出端与发射电路3的输入端连接，发射电路3的输出端分别与下游超声波传感器4和上游超声波传感器5的输出端连接。As shown in FIG. 1, the flow measuring device includes: a measured pipe segment 1, a main single chip 2, a transmitting circuit 3, a downstream ultrasonic sensor 4, an upstream ultrasonic sensor 5, a first receiving processing circuit 6, a second receiving processing circuit 7, and a time difference measurement. 8. The clock 9, the memory 10, the keyboard 11 and the LCD display 12; the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5 are respectively connected to the measured pipe section 1, and the output end of the downstream ultrasonic sensor 4 passes the first receiving processing circuit 6 and the time difference measurement. The input end of the upstream ultrasonic sensor 5 is connected to the input end of the time difference measurement 8 through the second receiving processing circuit 7; the output end of the time difference measuring 8 is bidirectionally connected with the main single chip 2; the clock 9, the memory 10, the keyboard 11 and the LCD display 12 are both connected to the main single chip 2, the output end of the main single chip 2 is connected to the input end of the transmitting circuit 3, and the output end of the transmitting circuit 3 is connected to the output ends of the downstream ultrasonic sensor 4 and the upstream ultrasonic sensor 5, respectively.
主单片机2发出测量命令后，发射电路3产生一定的波形，先对计数器清零，接着同步启动发射电路3触发超声波换能器发射超声波脉冲，利用下游超声波传感器4、上游超声波传感器5、接收处理电路I 6、接收处理电路II 7和时差测量8，可以得到超声波的顺流传播时间和逆流传播时间。主单片机2采用数字滤波计数对这些时间信号进行滤波处理，并根据实际情况计算出相应的流速和流量，保存到存储器10中，并送到LCD显示12上显示出来。After the main MCU 2 issues a measurement command, the transmitting circuit 3 generates a certain waveform, first clears the counter, then synchronously starts the transmitting circuit 3 to trigger the ultrasonic transducer to transmit an ultrasonic pulse, and uses the downstream ultrasonic sensor 4, the upstream ultrasonic sensor 5, and the receiving process. The circuit I 6, the reception processing circuit II 7 and the time difference measurement 8 can obtain the downstream propagation time and the counter current propagation time of the ultrasonic wave. The main MCU 2 filters the time signals by digital filtering, and calculates the corresponding flow rate and flow rate according to the actual situation, saves them in the memory 10, and sends them to the LCD display 12 for display.
针对被测管道内的流动状态和横截面上的速度分布类型，主单片机2采用积分算法计算出流速和流量。For the flow state in the pipeline to be tested and the type of velocity distribution on the cross section, the main microcontroller 2 uses an integration algorithm to calculate the flow rate and flow rate.
由于超声波在顺流或逆流传播时，其传播速度等于静水声速加上或减去流体流动速度。因此，当超声波从一个传感器发射后，将穿越不同流速的流层，也即超声波在传播过程中的速度是变化的。为了精确测出超声波的顺流传播时间和逆流传播时间差，必须采用积分的方法。超声波束沿顺流和逆流的传播时间差由如下积分得出：Since the ultrasonic wave propagates in a forward or countercurrent flow, its propagation speed is equal to the hydrostatic sound velocity plus or minus the fluid flow velocity. Therefore, when an ultrasonic wave is emitted from a sensor, it will traverse a flow layer of different flow rates, that is, the speed of the ultrasonic wave during propagation varies. In order to accurately measure the downstream propagation time of the ultrasonic wave and the countercurrent propagation time difference, an integral method must be used. The propagation time difference of the ultrasonic beam along the forward and reverse flows is obtained by the following integration:
Figure PCTCN2015089218-appb-000019
Figure PCTCN2015089218-appb-000019
其中，R为被测管道的半径；u为管内流速分布；θ为超声波束与流体流动方向的夹角；c为超声波在被测流体中的传播速度。Where R is the radius of the pipe to be tested; u is the flow velocity distribution inside the pipe; θ is the angle between the ultrasonic beam and the direction of fluid flow; c is the propagation velocity of the ultrasonic wave in the fluid to be measured.
例如，对于层流，圆管横截面上的速度分布为：For example, for laminar flow, the velocity profile across the cross section of the tube is:
Figure PCTCN2015089218-appb-000020
Figure PCTCN2015089218-appb-000020
其中，um为管道轴线最大流速。Where u m is the maximum flow rate of the pipe axis.
将层流速度分布代入(1)式，积分得时间差为：Substituting the laminar velocity distribution into equation (1), the integral time difference is:
Figure PCTCN2015089218-appb-000021
Figure PCTCN2015089218-appb-000021
则层流时Z型安装方式的流量为：The flow rate of the Z-type installation mode during laminar flow is:
Figure PCTCN2015089218-appb-000022
Figure PCTCN2015089218-appb-000022
而如果不考虑速度分布的非均匀性，按照平均速度计算超声波传播时间差，则所测量的流量为：And if the non-uniformity of the velocity distribution is not considered, the ultrasonic propagation time difference is calculated according to the average speed, and the measured flow rate is:
Figure PCTCN2015089218-appb-000023
Figure PCTCN2015089218-appb-000023
显然有：Obviously there are:
Figure PCTCN2015089218-appb-000024
Figure PCTCN2015089218-appb-000024
现有时差式超声波流量计所测得的层流流量为按本发明方法测得流量的1.16～0.39倍，其误差显而易见。The laminar flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 0.39 times the flow rate measured by the method of the present invention, and the error is obvious.
当被测流动为紊流时，将紊流速度分布代入(1)式，积分得时间差为：When the measured flow is turbulent, the turbulent velocity distribution is substituted into equation (1), and the time difference is:
Figure PCTCN2015089218-appb-000025
Figure PCTCN2015089218-appb-000025
其中，n为紊流速度分布的经验指数，一般随雷诺数的增大而增大。Where n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number.
则紊流时的流量为Then the flow rate during turbulence is
Figure PCTCN2015089218-appb-000026
Figure PCTCN2015089218-appb-000026
而不考虑速度分布的不均匀性得到的流量为：The flow obtained without considering the unevenness of the velocity distribution is:
Figure PCTCN2015089218-appb-000027
Figure PCTCN2015089218-appb-000027
则有Then there is
Figure PCTCN2015089218-appb-000028
Figure PCTCN2015089218-appb-000028
紊流速度分布的经验指数n一般为4～10，则现有时差式超声波流量计所测得的紊流流量为按本发明方法测量流量的1.16～1.05倍，其误差显而易见。The empirical index n of the turbulent velocity distribution is generally 4 to 10, and the turbulent flow rate measured by the existing time difference type ultrasonic flowmeter is 1.16 to 1.05 times the flow rate measured by the method of the present invention, and the error is obvious.
实施例2：图2中，为超声波传感器按V型布置结构，下游超声波传感器4与上游超声波传感器5同一侧，下游超声波传感器4位于上游超声波传感器5的下侧；其它与实施例1同。Embodiment 2: In Fig. 2, the ultrasonic sensor is arranged in a V-shape, the downstream ultrasonic sensor 4 is on the same side as the upstream ultrasonic sensor 5, and the downstream ultrasonic sensor 4 is located on the lower side of the upstream ultrasonic sensor 5; the other is the same as in the first embodiment.
实施例3：图3为本发明超声波传感器按W型布置结构图。下游超声波传感器4与上游超声波传感器5同一侧，下游超声波传感器4位于上游超声波传感器5的下侧二个V形距离；其它与实施例1同。 Embodiment 3: FIG. 3 is a structural diagram of a W-shaped arrangement of an ultrasonic sensor according to the present invention. The downstream ultrasonic sensor 4 is on the same side as the upstream ultrasonic sensor 5, and the downstream ultrasonic sensor 4 is located on the lower two V-shaped distances of the upstream ultrasonic sensor 5; the other is the same as in the first embodiment.

Claims (3)

  1. 一种时差式超声波流量测量方法，其特征是：该流量测量方法如下：A time difference type ultrasonic flow measuring method, characterized in that: the flow measuring method is as follows:
    超声波束沿顺流和逆流的传播时间差为：The propagation time difference of the ultrasonic beam along the forward and reverse flow is:
    Figure PCTCN2015089218-appb-100001
    Figure PCTCN2015089218-appb-100001
    当被测流动为层流时，将层流速度分布代入(1)式，积分得时间差为：When the measured flow is laminar, the laminar velocity distribution is substituted into equation (1), and the time difference is:
    Figure PCTCN2015089218-appb-100002
    Figure PCTCN2015089218-appb-100002
    其中，R为被测管道的半径；um为管道轴线最大流速；θ为超声波束与流体流动方向的夹角；c为超声波在被测流体中的传播速度；Where R is the radius of the pipe to be tested; u m is the maximum flow velocity of the pipe axis; θ is the angle between the ultrasonic beam and the direction of fluid flow; c is the propagation velocity of the ultrasonic wave in the fluid to be measured;
    则层流时的流量为：The flow rate during laminar flow is:
    Figure PCTCN2015089218-appb-100003
    Figure PCTCN2015089218-appb-100003
    其中，对Z型、V型、W型三种不同的安装方式，系数K分别取1、2、4；Among them, for the three different installation modes of Z-type, V-type and W-type, the coefficient K is taken as 1, 2, 4 respectively;
    不考虑速度分布的非均匀性，按照平均速度计算超声波传播时间差，则所测量的流量为：Regardless of the non-uniformity of the velocity distribution, the ultrasonic propagation time difference is calculated according to the average velocity, and the measured flow rate is:
    Figure PCTCN2015089218-appb-100004
    Figure PCTCN2015089218-appb-100004
    显然有：Obviously there are:
    Figure PCTCN2015089218-appb-100005
    Figure PCTCN2015089218-appb-100005
    当被测流动为紊流时，将紊流速度分布代入(1)式，积分得时间差为：When the measured flow is turbulent, the turbulent velocity distribution is substituted into equation (1), and the time difference is:
    Figure PCTCN2015089218-appb-100006
    Figure PCTCN2015089218-appb-100006
    其中，n为紊流速度分布的经验指数，一般随雷诺数的增大而增大；Where n is the empirical index of the turbulent velocity distribution, which generally increases with the increase of the Reynolds number;
    则紊流时的流量为Then the flow rate during turbulence is
    Figure PCTCN2015089218-appb-100007
    Figure PCTCN2015089218-appb-100007
    而不考虑速度分布的不均匀性得到的流量为：The flow obtained without considering the unevenness of the velocity distribution is:
    Figure PCTCN2015089218-appb-100008
    Figure PCTCN2015089218-appb-100008
    则有Then there is
    Figure PCTCN2015089218-appb-100009
    Figure PCTCN2015089218-appb-100009
  2. 权利要求1所述的一种时差式超声波流量测量方法的装置，其特征是：流量测量装置包括：被测量管段、主单片机、发射电路、下游超声波传感器、上游超声波传感器、第一接收处理电路、第二接收处理电路、时差测量、时钟、存储器、键盘和LCD显示； 下游超声波传感器、上游超声波传感器分别连接在被测量管段上、下游超声波传感器的输出端通过第一接收处理电路与时差测量的输入端连接，上游超声波传感器的输出端通过第二接收处理电路与时差测量的输入端连接；时差测量的输出端与主单片机双向通讯连接；时钟、存储器、键盘和LCD显示均与主单片机连接，主单片机的输出端与发射电路的输入端连接，发射电路的输出端分别与下游超声波传感器和上游超声波传感器的输出端连接。The apparatus for measuring a time difference type ultrasonic flow rate according to claim 1, wherein the flow rate measuring device comprises: a measured pipe segment, a main single chip microcomputer, a transmitting circuit, a downstream ultrasonic sensor, an upstream ultrasonic sensor, a first receiving processing circuit, Second receive processing circuit, time difference measurement, clock, memory, keyboard, and LCD display; The downstream ultrasonic sensor and the upstream ultrasonic sensor are respectively connected to the measured pipe segment, and the output end of the downstream ultrasonic sensor is connected to the input end of the time difference measurement through the first receiving processing circuit, and the output end of the upstream ultrasonic sensor passes the second receiving processing circuit and the time difference measurement. The input terminal is connected; the output of the time difference measurement is bidirectionally connected with the main MCU; the clock, the memory, the keyboard and the LCD display are all connected with the main MCU, the output end of the main MCU is connected with the input end of the transmitting circuit, and the output end of the transmitting circuit is respectively Connected to the downstream ultrasonic sensor and the output of the upstream ultrasonic sensor.
  3. 根据权利要求2所述的一种时差式超声波流量测量装置，其特征是：主单片机发出测量命令后，发射电路产生一定的波形，先对计数器清零，接着同步启动发射电路触发超声波换能器发射超声波脉冲，利用下游超声波传感器、上游超声波传感器、第一接收处理电路、第二接收处理电路和时差测量，可以得到超声波的顺流传播时间和逆流传播时间；主单片机采用数字滤波计数对这些时间信号进行滤波处理，并根据实际情况计算出相应的流速和流量，保存到存储器中，并送到LCD显示上显示出来；A time difference type ultrasonic flow measuring device according to claim 2, wherein after the main MCU issues a measurement command, the transmitting circuit generates a certain waveform, first clears the counter, and then synchronously activates the transmitting circuit to trigger the ultrasonic transducer. The ultrasonic pulse is transmitted, and the downstream ultrasonic wave sensor, the upstream ultrasonic wave sensor, the first receiving processing circuit, the second receiving processing circuit, and the time difference measurement are used to obtain the downstream propagation time and the reverse current propagation time of the ultrasonic wave; the main single chip microcomputer uses digital filtering to count these times. The signal is filtered, and the corresponding flow rate and flow rate are calculated according to actual conditions, saved in the memory, and sent to the LCD display for display;
    针对被测管道内的流动状态和横截面上的速度分布类型，主单片机采用积分算法计算出流速和流量。 For the flow state in the pipeline to be tested and the type of velocity distribution on the cross section, the main microcontroller uses an integration algorithm to calculate the flow rate and flow rate.
PCT/CN2015/089218 2015-07-03 2015-09-09 Method and apparatus for measuring time-difference-type ultrasonic flow WO2017004887A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2016/04937A ZA201604937B (en) 2015-07-03 2016-07-15 Time-difference ultrasonic flow measurement method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510387517.5A CN105157771B (en) 2015-07-03 2015-07-03 A kind of transit-time ultrasonic flow measuring method and device
CN201510387517.5 2015-07-03

Publications (1)

Publication Number Publication Date
WO2017004887A1 true WO2017004887A1 (en) 2017-01-12

Family

ID=54798710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/089218 WO2017004887A1 (en) 2015-07-03 2015-09-09 Method and apparatus for measuring time-difference-type ultrasonic flow

Country Status (3)

Country Link
CN (1) CN105157771B (en)
WO (1) WO2017004887A1 (en)
ZA (1) ZA201604937B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109506727A (en) * 2018-12-24 2019-03-22 西安安森智能仪器股份有限公司 A kind of ultrasonic flow measuring method and low-consumption ultrasonic flow measurement meter
CN112484798A (en) * 2020-11-27 2021-03-12 江西中科智慧水产业研究股份有限公司 Time difference ultrasonic flow measuring method based on improved Kalman filter
CN112945518A (en) * 2021-02-04 2021-06-11 武汉大学 Open channel constant flow energy loss determination method
CN114019185A (en) * 2021-09-28 2022-02-08 江苏启泰物联网科技有限公司 Liquid flow rate monitoring method for railway
CN115628786A (en) * 2022-09-26 2023-01-20 浙江启尔机电技术有限公司 Ultrasonic flow measuring method and flow meter using same
CN118482785A (en) * 2024-07-16 2024-08-13 安徽汉威电子有限公司 Flow measurement method and device for large-caliber pipeline

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108168630B (en) * 2016-12-07 2019-11-01 辽宁思凯科技股份有限公司 A kind of ultrasonic water meter detection device and measuring method
CN106996811A (en) * 2017-03-30 2017-08-01 山东思达特测控设备有限公司 A kind of metering method of the intelligent liquid ultrasonic low of high accuracy
EP3388794B2 (en) * 2017-04-13 2022-03-09 SICK Engineering GmbH Measuring device for measuring a flow speed of a fluid
CN108120481B (en) * 2017-11-10 2023-10-31 天津新科成套仪表有限公司 Ultrasonic flow metering method and metering processing device
CN108414039B (en) * 2018-05-18 2024-09-27 广东万家乐燃气具有限公司 Water flow and water temperature detection method and water flow sensor
CN110375818A (en) * 2019-04-12 2019-10-25 宁夏隆基宁光仪表股份有限公司 Total temperature range ultrasonic flow rate measuring high-precision low-power consumption compensation method
CN110296912B (en) * 2019-06-19 2020-07-21 北京理工大学 System and method for detecting dust cloud cluster diffusion dynamic turbulent flow energy based on ultrasound
CN110455360B (en) * 2019-08-28 2021-08-06 杭州乾博科技有限公司 Ultrasonic water meter
CN111473827B (en) * 2020-05-28 2022-04-01 宁波大学 V-shaped sound channel zero drift elimination method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047790A1 (en) * 2005-10-05 2007-04-12 Endress + Hauser Flowtec Ag Device for determining or monitoring the volume or mass flow of a medium through a pipeline
US20070255514A1 (en) * 2006-04-28 2007-11-01 Tokyo Keiso Co., Ltd Ultrasonic flow meter
CN101118170A (en) * 2007-08-28 2008-02-06 南京申瑞电气系统控制有限公司 Multiple acoustic circuit time difference type supersonic flowmeter
CN101907473A (en) * 2010-07-05 2010-12-08 李俊国 Ultrasonic flowmeter
CN103090916A (en) * 2013-02-22 2013-05-08 呼和浩特市睿城科技有限责任公司 Ultrasonic flow measurement device and ultrasonic flow measurement method
US20150260556A1 (en) * 2014-03-17 2015-09-17 Siemens Aktiengesellschaft Ultrasonic transit-time flowmeter and method for detecting a failure in an ultrasonic transit-time flowmeter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6950768B2 (en) * 2003-09-08 2005-09-27 Daniel Industries, Inc. Self-tuning ultrasonic meter
CN100434875C (en) * 2005-08-03 2008-11-19 侯安亮 Ultrasonic flowmeter and its theory and technique
CN1804557A (en) * 2006-01-24 2006-07-19 天津大学 Signal processing method of propagation speed differential type ultrasonic flowmeter
CN102207398B (en) * 2011-04-07 2013-06-12 托肯恒山科技（广州）有限公司 Ultrasonic flow measurement device and method for fuel terminal settlement
CN102288235B (en) * 2011-04-26 2014-09-24 广州昉时工业自动控制系统有限公司 Double-track mixed type ultrasonic flowmeter and measuring method
CN103528717A (en) * 2013-10-21 2014-01-22 天津鸥翼科技发展有限公司 Low-resistance pipe section for pipe-section-type small-caliber ultrasonic heat meter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047790A1 (en) * 2005-10-05 2007-04-12 Endress + Hauser Flowtec Ag Device for determining or monitoring the volume or mass flow of a medium through a pipeline
US20070255514A1 (en) * 2006-04-28 2007-11-01 Tokyo Keiso Co., Ltd Ultrasonic flow meter
CN101118170A (en) * 2007-08-28 2008-02-06 南京申瑞电气系统控制有限公司 Multiple acoustic circuit time difference type supersonic flowmeter
CN101907473A (en) * 2010-07-05 2010-12-08 李俊国 Ultrasonic flowmeter
CN103090916A (en) * 2013-02-22 2013-05-08 呼和浩特市睿城科技有限责任公司 Ultrasonic flow measurement device and ultrasonic flow measurement method
US20150260556A1 (en) * 2014-03-17 2015-09-17 Siemens Aktiengesellschaft Ultrasonic transit-time flowmeter and method for detecting a failure in an ultrasonic transit-time flowmeter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109506727A (en) * 2018-12-24 2019-03-22 西安安森智能仪器股份有限公司 A kind of ultrasonic flow measuring method and low-consumption ultrasonic flow measurement meter
CN109506727B (en) * 2018-12-24 2023-12-26 西安安森智能仪器股份有限公司 Ultrasonic flow measurement method and low-power consumption ultrasonic flowmeter
CN112484798A (en) * 2020-11-27 2021-03-12 江西中科智慧水产业研究股份有限公司 Time difference ultrasonic flow measuring method based on improved Kalman filter
CN112484798B (en) * 2020-11-27 2024-03-19 中科水研(江西)科技股份有限公司 Time difference ultrasonic flow measurement method based on improved Kalman filter
CN112945518A (en) * 2021-02-04 2021-06-11 武汉大学 Open channel constant flow energy loss determination method
CN112945518B (en) * 2021-02-04 2023-05-05 武汉大学 Method for determining energy loss of constant flow of open channel
CN114019185A (en) * 2021-09-28 2022-02-08 江苏启泰物联网科技有限公司 Liquid flow rate monitoring method for railway
CN115628786A (en) * 2022-09-26 2023-01-20 浙江启尔机电技术有限公司 Ultrasonic flow measuring method and flow meter using same
CN118482785A (en) * 2024-07-16 2024-08-13 安徽汉威电子有限公司 Flow measurement method and device for large-caliber pipeline

Also Published As

Publication number Publication date
CN105157771A (en) 2015-12-16
CN105157771B (en) 2018-04-03
ZA201604937B (en) 2022-05-25

Similar Documents

Publication Publication Date Title
WO2017004887A1 (en) Method and apparatus for measuring time-difference-type ultrasonic flow
EP3268701B1 (en) Hybrid sensing ultrasonic flowmeter
CA2702666C (en) A method and system for detecting deposit buildup within an ultrasonic flow meter
CN103808381B (en) A kind of temperature influence eliminating method of transit-time ultrasonic flow meter
CN206930321U (en) Non-full pipe ultrasonic flowmeter
US9140594B2 (en) Ultrasonic, flow measuring device
CN103868555A (en) Circulatory time difference detection method for ultrasonic flow meter
CN106768103A (en) A kind of method of the automatic prover time deviation of ultrasonic flowmeter
CN101598580B (en) Method for improving precision of transit-time ultrasonic flow meter
CN104501889A (en) Detection method and device for ultrasonic flow based on cross-correlation time difference method
CN106643937A (en) Flow measuring method and device based on ultrasonic flowmeter
WO2018045754A1 (en) Fluid velocity measuring method, fluid metering method and flowmeter
CN105403265A (en) Automatic zero drift-correction ultrasound water meter and correction method
CN114088151B (en) External clamping type multichannel ultrasonic flow detection device and detection method
CN105181997A (en) Non-contact ultrasonic flow velocity meter and non-contact flow velocity detection method
CN104457871A (en) Flowmeter and fluid measurement method
JP2006078362A (en) Coaxial-type doppler ultrasonic current meter
JP2002340644A (en) Ultrasonic flow and flow velocity-measuring instrument and ultrasonic flow and flow velocity-measuring method
CN206291930U (en) A kind of ultrasonic wave mass flowmenter
JP5282955B2 (en) Ultrasonic flow meter correction method and ultrasonic flow meter
CN104964718A (en) Small flow ultrasonic flow system and measuring method
CN106092228A (en) Ultrasonic type heat accumulative meter
US20230243682A1 (en) Ultrasonic flow measurement
JP2015132488A (en) Ultrasonic flowmeter
CN114543950A (en) Orthogonal measurement method based on multi-channel ultrasonic water meter and multi-channel ultrasonic water meter

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15897543

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15897543

Country of ref document: EP

Kind code of ref document: A1