CN109489742A - Piping flow measuring device and method based on pressure signal - Google Patents

Piping flow measuring device and method based on pressure signal Download PDF

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Publication number
CN109489742A
CN109489742A CN201811424806.8A CN201811424806A CN109489742A CN 109489742 A CN109489742 A CN 109489742A CN 201811424806 A CN201811424806 A CN 201811424806A CN 109489742 A CN109489742 A CN 109489742A
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CN
China
Prior art keywords
pressure
resolving
controller
flow
pressure sensor
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Pending
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CN201811424806.8A
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Chinese (zh)
Inventor
徐远志
唐哲文
赵肖熙
焦宗夏
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Beihang University
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Beihang University
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Priority to CN201811424806.8A priority Critical patent/CN109489742A/en
Publication of CN109489742A publication Critical patent/CN109489742A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects
    • G01F1/34Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
    • G01F1/36Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction

Abstract

The disclosure provides a kind of piping flow measuring device based on pressure signal, comprising: test pipeline provides the access that measured fluid flows through;Pressure sensor configures on testing tube road, detects the pressure for being measured fluid;And controller is resolved, it is connect with pressure sensor, is resolved according to the pressure of measured fluid and obtain the flow for being measured fluid;The disclosure provides a kind of piping flow measurement method based on pressure signal simultaneously, using above-mentioned measuring device, comprising the following steps: determines the installation site of pressure sensor, and resolves period resolving time of controller;Initialize the pressure and flow for being measured fluid;And installation site and period resolving time based on the pressure sensor, the output signal for resolving controller and acquiring the pressure sensor, the output signal is converted to the pressure values at current time, according to the pressure values at the current time, the flow for resolving controller and exporting the current time of the measured fluid.

Description

Piping flow measuring device and method based on pressure signal
Technical field
This disclosure relates to a kind of piping flow measuring device and method based on pressure signal.
Background technique
At this stage, the device measured to flow is generally by differential, turbine type, eddy currents, ultrasonic wave, laser Etc. measurement methods, but these methods have the defects that it is certain.The flow-measuring methods such as differential, turbine type, eddy currents need Throttle orifice is arranged in the duct or places turbine or vortex generator, throttle orifice to bring throttling to the fluid flowed in pipeline Loss, turbine or vortex generator can then affect the nowed forming of fluid.In addition, being surveyed using turbine or vortex generator The precision of amount fluid flow is limited by the precision of the turbine number of teeth and sensing element, can not be carried out to the dynamic flow of fluid accurate Measurement.The methods of ultrasonic wave and laser then have biggish requirement to the vibration in environment, deposit in the case of vibrations in environment Biggish error will be introduced.
Summary of the invention
In order to solve at least one above-mentioned technical problem, the disclosure provides a kind of piping flow measurement based on pressure signal Device and a kind of method that flow is measured using the measuring device.
According to one aspect of the disclosure, the piping flow measuring device based on pressure signal includes:
Pipeline is tested, the access that measured fluid flows through is provided;
Pressure sensor configures on testing tube road, detects the pressure for being measured fluid;And
Controller is resolved, is connect with pressure sensor, is resolved according to the pressure of measured fluid and obtains measured fluid Flow.
According at least one embodiment of the disclosure, the quantity of pressure sensor is at least 2, adjacent pressure sensing Device is configured in test pipeline outer wall with fixed range.
According at least one embodiment of the disclosure, when pressure sensor detects the pressure for being measured fluid, invaded to be non- Enter formula detection.
According at least one embodiment of the disclosure, the output signal that controller passes through acquisition pressure sensor is resolved, The pressure values that output signal is converted to current time resolve controller output and are measured stream according to the pressure values at current time The flow at the current time of body.
According at least one embodiment of the disclosure, the built-in pipeline fluid kinetic model of controller is resolved, based on pipe Road hydrodinamical model resolves controller and resolves the flow for obtaining measured fluid according to the pressure for being measured fluid.
According to another aspect of the present disclosure, the piping flow measurement method based on pressure signal is filled using above-mentioned measurement Set, the measurement method the following steps are included:
It determines the installation site of the pressure sensor of measuring device, and resolves period resolving time of controller;
Initialize the pressure and flow for being measured fluid;And
Installation site and period resolving time based on pressure sensor resolve the output of controller acquisition pressure sensor Output signal is converted to the pressure values at current time by signal, and according to the pressure values at current time, it is tested to resolve controller output Measure the flow at the current time of fluid.
According at least one embodiment of the disclosure, the quantity of pressure sensor is at least 2, adjacent pressure sensing On the outer wall for the test pipeline that device configured with fixed range in measuring device.
According at least one embodiment of the disclosure, the installation site of pressure sensor is determined, and resolve controller Period resolving time the step of include:
Adjacent pressure sensor is configured on the outer wall for testing pipeline according to fixed range, test pipeline is carried out empty Between divide, determine test pipeline space lattice size;
Controller will be resolved to connect with pressure sensor;And
The velocity of wave for being measured fluid is detected, period resolving time for resolving controller is determined according to velocity of wave.
According at least one embodiment of the disclosure, the step of initializing the pressure and flow that are measured fluid, includes:
Based on the space lattice size of test pipeline, resolves controller and start to acquire the output signal of pressure sensor, solution Calculate the pressure distribution situation for being measured fluid, the pressure of each space networks lattice point of initialization test pipeline;And
The flow for testing each space networks lattice point of pipeline is initialized as arbitrary value.
According at least one embodiment of the disclosure, it is based on space lattice size and period resolving time, resolves control Device acquires the output signal of pressure sensor again and is converted to pressure values, using the pressure values at collected current time as side Boundary's condition substitutes into pipeline fluid kinetics equation and utilizes spy according to the pressure values and flow value of the last moment of measured fluid It levies line method and solves pipeline fluid kinetics equation, obtain the flow value for being measured fluid current time.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure, Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this Part of specification.
Fig. 1 is the original according to the piping flow measuring device based on pressure signal of at least one embodiment of the disclosure Reason figure.
Specific embodiment
The disclosure is described in further detail with embodiment with reference to the accompanying drawing.It is understood that this place The specific embodiment of description is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that being Convenient for description, part relevant to the disclosure is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can To be combined with each other.The disclosure is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Disclosed technique scheme is mainly using the pressure sensor for the fixed position being mounted in pipeline outer wall, respectively The real-time fluid pressure at installation point position is measured, is then solved collected pressure signal by real-time operation controller It calculates, is solved using water hammer of the pressure-flow computation to pipeline, accurately calculate the real-time streams of fluid in pipeline Amount, the data on flows that can finally will acquire, which is exported to human-computer interaction device, to be checked and analyzes.
In an optional embodiment of the disclosure, as shown in Figure 1, the piping flow measuring device based on pressure signal Mainly it is made of test pipeline, pressure sensor and resolving controller (pressure-flow resolving controller).
Preferably, test pipeline is the pipeline of one section of regular length, provides the access that measured fluid flows through, while being pressure The installation of force snesor provides fixed installation point.
Preferably, the quantity of pressure sensor is at least 2, such as the present embodiment uses 2 pressure sensors.Adjacent Pressure sensor is configured in test pipeline outer wall with fixed range, i.e., pressure sensor is installed on the fixed bit for testing pipeline It sets, precise measurement in real time is carried out to the fluid pressure of installed position respectively.Adjacent pressure sensor is outside test pipeline Fixed range, that is, relative distance on wall can be needed according to actual measurement by operator's flexible setting.
Pressure measurement of the pressure sensor configuration of the disclosure in test pipeline outer wall, i.e., to the fluid in test pipeline It is non-intrusion type, does not influence fluid flow state, helps to measure accurate dynamic flow.
Preferably, it resolves controller to connect with pressure sensor, resolving controller can be according to the pressure of measured fluid Resolve the flow for obtaining and being measured fluid.The key process unit that controller is the measuring device is resolved, working principle is mainly Using pressure-flow computation, core is built-in pipeline fluid kinetic model.Based on the kinetic model, resolve Controller is by the pressure sensor output signal of fixed position on real-time read test pipeline, and further by pressure signal Pressure values are converted to, the real-time fluid stream of pipeline fixed position then can be calculated according to the pressure values for being measured fluid Amount, computing speed are very fast.
In an optional embodiment of the disclosure, carried out using the piping flow measuring device based on pressure signal real When flow measurement method the following steps are included:
1) it determines the installation site of pressure sensor, and resolves period resolving time of controller: according to measuring device And actual measurement needs to carry out measurement solution process the division of space lattice and time grid.First by adjacent pressure sensing Device configures on the outer wall for testing pipeline according to pre-set fixed range, carries out space to test pipeline in calculation procedure Segmentation determines the size of the space lattice of test pipeline;Then, controller will be resolved to connect with each pressure sensor;Then, The velocity of wave for being measured fluid is detected, period resolving time for resolving controller is determined according to velocity of wave.
2) initialize the pressure and flow for being measured fluid: the space lattice size based on test pipeline resolves controller The output signal for starting to acquire pressure sensor turns the pressure signal of output this time to acquire pressure sensor signal for the first time Pressure values are changed to, the pressure distribution situation for being measured fluid, the pressure of each space networks lattice point of initialization test pipeline are resolved;So The flow for testing each space networks lattice point of pipeline is initialized as arbitrary value afterwards.
It should be noted that preferred, measure start when, carry out the pressure of fluid and flow in test pipeline first Initialization.But resolve pressure-flow computation used by controller and do not depend on flow initial value, the result finally solved It is not influenced by flow initial value, that is, is subjected to arbitrary fluid flow initial value, therefore, it is auxiliary not need additional flowmeter yet It helps.
3) flow of current time measured fluid is obtained: installation site and week resolving time based on pressure sensor Phase resolves the output signal of controller acquisition pressure sensor, output signal is converted to the pressure values at current time, according to working as The pressure values at preceding moment resolve controller and export the flow for being measured the current time of fluid.
Specifically, being based on space lattice size and period resolving time, resolves controller and acquire each pressure sensing again The output signal of device is simultaneously converted to pressure values, substitutes into pipeline fluid for the pressure values at collected current time as boundary condition Kinetics equation solves pipeline stream using characteristic line method according to the pressure values and flow value of the last moment of measured fluid Body dynamics equation obtains the flow value for being measured fluid current time.
4) step 3) is repeated, obtains in test pipeline and is measured the real-time flow data of fluid, until exiting measurement.
In conclusion the piping flow measuring device based on pressure signal of the disclosure, is only made of 3 main components, It is compact-sized, easy for installation, integrated level is high, light-weight and have and be quick on the draw, measuring accuracy is high, the high spy of dynamic effect Point.When actual measurement, using non-invasive method, measured fluid is resolved by the pressure signal on collecting test pipeline Real-time flow data, fast response time, and can effectively exclude the noise jamming of vibration etc. in environment, strong antijamming capability. The core component of the disclosure resolves controller, solves pipeline water hammer by the characteristic line method (MOC) with boundary condition, Initial value of the solving result independent of fluid flow in pipeline does not need to configure additional flowmeter auxiliary.Disclosed technique Scheme can be widely used in field of fluid measurement.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.

Claims (10)

1. a kind of piping flow measuring device based on pressure signal characterized by comprising
Pipeline is tested, the access that measured fluid flows through is provided;
Pressure sensor configures on the testing tube road, detects the pressure of the measured fluid;And
Controller is resolved, is connect with the pressure sensor, is resolved according to the pressure of the measured fluid and obtains described be tested Measure the flow of fluid.
2. measuring device according to claim 1, which is characterized in that the quantity of the pressure sensor is at least 2, phase The adjacent pressure sensor is configured in the test pipeline outer wall with fixed range.
3. measuring device according to claim 1 or 2, which is characterized in that the pressure sensor detection is described to be measured It is Noninvasive testing when the pressure of fluid.
4. measuring device according to claim 1 or 2, which is characterized in that the resolving controller is by acquiring the pressure The output signal is converted to the pressure values at current time by the output signal of force snesor, according to the pressure at the current time Intensity values, the flow for resolving controller and exporting the current time of the measured fluid.
5. measuring device according to claim 4, which is characterized in that the built-in pipeline fluid dynamics of resolving controller Model, is based on the pipeline fluid kinetic model, and the resolving controller is obtained according to the resolving of the pressure of the measured fluid Obtain the flow of the measured fluid.
6. a kind of piping flow measurement method based on pressure signal, which is characterized in that using any in such as claim 1 to 5 Described in measuring device, the measurement method the following steps are included:
It determines the installation site of the pressure sensor of the measuring device, and resolves period resolving time of controller;
Initialize the pressure and flow for being measured fluid;And
Installation site and period resolving time based on the pressure sensor, the resolving controller acquire the pressure The output signal is converted to the pressure values at current time by the output signal of sensor, according to the pressure at the current time Value, the flow for resolving controller and exporting the current time of the measured fluid.
7. measurement method according to claim 6, which is characterized in that the quantity of the pressure sensor is at least 2, phase On the outer wall for the test pipeline that the adjacent pressure sensor configured with fixed range in the measuring device.
8. measurement method according to claim 6 or 7, which is characterized in that determine the installation site of pressure sensor, and Resolve controller period resolving time the step of include:
By the adjacent pressure sensor according to fixed range configure test pipeline outer wall on, to the test pipeline into The segmentation of row space determines the size of the space lattice of the test pipeline;
The resolving controller is connect with the pressure sensor;And
The velocity of wave for detecting the measured fluid determines period resolving time for resolving controller according to the velocity of wave.
9. measurement method according to claim 8, which is characterized in that initialize the step of the pressure and flow that are measured fluid Suddenly include:
Based on the space lattice size of the test pipeline, the resolving controller starts to acquire the output of the pressure sensor Signal resolves the pressure distribution situation of the measured fluid, initializes the pressure of the test each space networks lattice point of pipeline; And
The flow of each space networks lattice point of the test pipeline is initialized as arbitrary value.
10. measurement method according to any one of claims 6 to 9, which is characterized in that
Based on the space lattice size and period resolving time, the resolving controller acquires the pressure sensing again The output signal of device is simultaneously converted to pressure values, substitutes into pipeline fluid for the pressure values at collected current time as boundary condition Kinetics equation solves institute using characteristic line method according to the pressure values and flow value of the last moment of the measured fluid Pipeline fluid kinetics equation is stated, the flow value at the measured fluid current time is obtained.
CN201811424806.8A 2018-11-27 2018-11-27 Piping flow measuring device and method based on pressure signal Pending CN109489742A (en)

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