CN103674476A - Periodic open channel unsteady flow non-contact turbulent structure measurement and control system - Google Patents
Periodic open channel unsteady flow non-contact turbulent structure measurement and control system Download PDFInfo
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- CN103674476A CN103674476A CN201310204252.1A CN201310204252A CN103674476A CN 103674476 A CN103674476 A CN 103674476A CN 201310204252 A CN201310204252 A CN 201310204252A CN 103674476 A CN103674476 A CN 103674476A
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Abstract
The invention discloses a periodic open channel unsteady flow non-contact turbulent structure measurement and control system which is formed by a water level measurement and control computer module, a water depth non-contact measurement module, a flow measurement module, and a vertical surface flow field non-contact measurement module. According to the measurement and control system, a stable periodic unsteady flow process with any shape can be obtained, the reaction speed is fast, the stepless variable speed can be achieved, an obtained signal is more accurate, the interference of water flow by a traditional measurement method is avoided, the precision is good, the limit of space single point velocity measurement is broken, the flow information of a plane can be measured in a moment, the system has the characteristics of high spatial resolution, large quantity of obtained information and continuous measurement without interference, the control of a periodic open channel unsteady flow and the high frequency non-contact synchronization measurement of flow, water depth and instantaneous flow field are realized, and a strong technical support is provided for the experimental study of the open channel unsteady flow.
Description
Technical field
The invention belongs to fluid observation and control technology field, relate in particular to the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT&C system.
Background technology
Current in natural river course are all unsteady flow conventionally, current, and with the quickening of water development pace of construction, river course unsteady flow problem becomes increasingly conspicuous.The unsteady flow of letting out under upstream produces larger impact to meetings such as the differentiation in the flood control of downstream river course, navigation condition and river course.Therefore, develop more advanced measurement means, seek propagation law and kinetic characteristic that new thinking is studied unsteady flow in open, for the development of water conservancy subject and the solution of the practical problems such as harbour, shipping and urban flood defence, all there is important theory and engineering significance.But unsteady flow in open problem itself is very complicated, aspect control method, system and adjustable weir that prior art adopts electromagnetic flowmeter and electric control valve to form more carry out unsteady flow test; Aspect level measuring, mostly adopt traditional water-level gauge and probe; And aspect fluid-velocity survey, mostly adopt propeller current meter, ultrasonic current meter, can well realize control and the analytical measurement of unsteady flow.
The be put to the test restriction of equipment of prior art.In control method, although system and adjustable weir that electromagnetic flowmeter and electric control valve form can carry out unsteady flow test, measuring accuracy and reaction rate are all undesirable; Secondly, not only reaction rate is slow aspect level measuring, to adopt traditional water-level gauge and probe, and may cause the disturbance of current; And aspect fluid-velocity survey, not only disturbance is large for propeller current meter, ultrasonic current meter, and its spot measurement cannot meet the demand of unsteady flow.Meanwhile, although some novel controls of existing appearance and measuring equipment can well be realized control and the analytical measurement of unsteady flow, owing to cannot accomplishing the synchronous of water level, flow and flow velocity in measuring process, to data processing etc., bring sizable difficulty.
Summary of the invention
The object of the present invention is to provide the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT&C system, be intended to solve prior art precision low, reaction rate is undesirable, has disturbance, can only spot measurement, and the problem of poor synchronization.
The present invention is achieved in that the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT&C system, by water level measuring and controlling computer module, and depth of water non-contact measurement module, flow measurement module, vertical plane flow field non-contact measurement module.
Water level measuring and controlling computer module, connection traffic measurement module, depth of water non-contact measurement module, vertical plane flow field non-contact measurement module, for sending measuring control information and receiving and show the measurement data of each module;
Depth of water non-contact measurement module, connects water level measuring and controlling computer module and controlled by it, for gathering water signal, obtains corresponding waterlevel data and uploads water level measuring and controlling computer module;
Flow measurement module, connects water level measuring and controlling computer module and controlled by it, and the flow information recording is uploaded to water level measuring and controlling computer module;
Vertical plane flow field non-contact measurement module, connects water level measuring and controlling computer module and controlled by it, for obtaining synchronous plane information of flow.
Further, except water-level gauge, depth of water non-contact measurement module adopts ultrasonic probe to carry out bathymetric survey, and water level measuring and controlling computer module gathers ultrasonic probe voltage by AD plate.
Further, flow measurement module is usingd frequency converter that controlled frequency the is object speed control device as pump motor, frequency converter connection bit Measurement &control computer module is also controlled by it, and water pump connects frequency converter, changes frequency obtain different rotating speeds to control water pump by frequency converter.
Further, in flow measurement module, between frequency converter and water level measuring and controlling computer module, by AD plate, be connected and communicate.
Further, on water supply line between flow measurement module water pump and tank, settle electromagnetic flowmeter, between electromagnetic flowmeter and water level measuring and controlling computer module, by AD plate, be connected and communicated, the real-time voltage value that AD plate collects electromagnetic flowmeter transfers to water level measuring and controlling computer module.
Further, non-contact measurement module in vertical plane flow field adopts PIV commercial measurement Flow Field Distribution.By isochronous controller, laser instrument, CCD camera, camera card, PIV computing machine forms, for obtaining synchronous plane information of flow.Wherein:
Isochronous controller connects water level measuring and controlling computer module, receives the Transistor-Transistor Logic level signal controlling non-contact measurement module action of water level measuring and controlling computer module;
Laser instrument connects isochronous controller, and when isochronous controller moves, pulsed laser light source forms pulse sheet laser by spherical mirror and cylindrical mirror, illuminates the flow region that needs measurement in flow field;
CCD camera connects isochronous controller, when isochronous controller move, and trace particle visual uploading in the CCD cameras record current downflow region of taking with sheet laser vertical direction;
Camera links and connects PIV computing machine, camera card is stored mutual photo, and image is sent into after PIV computing machine digitizing, and digitized picture matrix in critical region is carried out to computing cross-correlation, obtain the displacement of trace particle in known interval, can obtain thus the velocity information of each point in flow field.
Flow measurement module is usingd frequency converter that controlled frequency is object and obtains periodicity unsteady flow process stable, arbitrary shape as the speed control device of pump motor by adopting, and compares motorized valve and has that reaction velocity is fast, advantage that can electrodeless variable-speed; Water level measuring and controlling computer module is connected and is communicated by AD plate, makes picked up signal more stable accurately; On water supply line between flow measurement module water pump and tank, settle electromagnetic flowmeter survey actual flow to check, prevented the error that Frequency Converter Control pump rotary speed is exerted oneself and caused; Depth of water non-contact measurement module adopts ultrasonic probe to carry out bathymetric survey, has avoided the interference of traditional measurement method to current, and precision is better.Vertical plane flow field non-contact measurement module is by adopting PIV commercial measurement Flow Field Distribution, PIV technological breakthrough the limitation of space single-point fluid-velocity survey, can be at the flowing information of a plane of instantaneous measurement, have that spatial resolution is high, obtaining information amount is large and the feature of noiseless continuous coverage.
Accompanying drawing explanation
Fig. 1 is the contactless turbulent fluctuation structure of periodicity unsteady flow in open provided by the invention TT&C system work structuring schematic diagram.
In figure: 1, water level measuring and controlling computer module; 2, depth of water non-contact measurement module; 3, flow measurement module; 3-1, water pump; 3-2, frequency converter; 4, vertical plane flow field non-contact measurement module; 4-1, isochronous controller; 4-2, laser instrument; 4-3, CCD camera; 4-4, camera card; 4-5, PIV computing machine.
Embodiment
The present invention is achieved in that the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT&C system, by water level measuring and controlling computer module 1, depth of water non-contact measurement module 2, flow measurement module 3, vertical plane flow field non-contact measurement module 4, as shown in Figure 1.
Water level measuring and controlling computer module 1, connection traffic measurement module 2, depth of water non-contact measurement module 3, vertical plane flow field non-contact measurement module 4, for sending measuring control information and receiving and show the measurement data of each module;
Depth of water non-contact measurement module 2, connects water level measuring and controlling computer module 1 and controlled by it, for gathering water signal, obtains corresponding waterlevel data and uploads water level measuring and controlling computer module 1;
Vertical plane flow field non-contact measurement module 4, connects water level measuring and controlling computer module 1 and controlled by it, for obtaining synchronous plane information of flow.
Further, except water-level gauge, depth of water non-contact measurement module 2 adopts ultrasonic probe to carry out bathymetric survey, and water level measuring and controlling computer module 1 gathers ultrasonic probe voltage by AD plate.
Further, flow measurement module 3 is usingd frequency converter 3-2 that controlled frequency the is object speed control device as water pump 3-1 motor, frequency converter 3-2 connection bit Measurement &control computer module 1 is also controlled by it, water pump 3-1 connects frequency converter 3-2, changes frequency obtain different rotating speeds to control water pump 3-1 by frequency converter 3-2.
Further, in flow measurement module 3, between frequency converter 3-2 and water level measuring and controlling computer module 1, by AD plate, be connected and communicate.
Further, on water supply line between flow measurement module 3 water pump 3-1 and tank, settle electromagnetic flowmeter, between electromagnetic flowmeter and water level measuring and controlling computer module 1, by AD plate, be connected and communicated, the real-time voltage value that AD plate collects electromagnetic flowmeter transfers to water level measuring and controlling computer module 1.
Further, vertical plane flow field non-contact measurement module 4 adopts PIV commercial measurement Flow Field Distribution.By isochronous controller 4-1, laser instrument 4-2, CCD camera 4-3, camera card 4-4, PIV computing machine 4-5 forms, for obtaining synchronous plane information of flow.Wherein:
Isochronous controller 4-1 connects water level measuring and controlling computer module 1, receives Transistor-Transistor Logic level signal controlling non-contact measurement module 4 actions of water level measuring and controlling computer module 1;
Laser instrument 4-2 connects isochronous controller 4-1, and when isochronous controller 4-1 moves, pulsed laser light source forms pulse sheet laser by spherical mirror and cylindrical mirror, illuminates the flow region that needs measurement in flow field;
CCD camera 4-3 connects isochronous controller 4-1, when isochronous controller 4-1 move, and trace particle visual uploading in the CCD cameras record current downflow region of taking with sheet laser vertical direction;
Camera card 4-4 connects PIV computing machine 4-5, camera card 4-4 stores mutual photo, image is sent into after PIV computing machine 4-5 digitizing, digitized picture matrix in critical region is carried out to computing cross-correlation, obtain the displacement of trace particle in known interval, can obtain thus the velocity information of each point in flow field.
When needs carry out fluid-velocity survey, the water level measuring and controlling computer module 1 in this pilot system is by built-in water level and flow control programmed control depth of water non-contact measurement module 2, flow measurement module 3,4 work of vertical plane flow field non-contact measurement module.Depth of water non-contact measurement module 2 carry out level measuring and, flow measurement module 3 is carried out flow collection, water level measuring and controlling computer module 1 sends Transistor-Transistor Logic level signal to the isochronous controller 4-1 in vertical plane flow field non-contact measurement module 4 simultaneously, start isochronous controller 4-1 triggering laser instrument 4-2 and CCD camera 4-3 and carry out fluid-velocity survey, and record sampled data, accomplish the synchronism of water level and fluid-velocity survey, flow velocity sampling is each time corresponding clear and definite water level sampling and the time all.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the contactless turbulent fluctuation structure of a unsteady flow in open TT&C system periodically, it is characterized in that, the contactless turbulent fluctuation structure of described periodicity unsteady flow in open TT&C system is by water level measuring and controlling computer module, depth of water non-contact measurement module, flow measurement module, vertical plane flow field non-contact measurement module composition;
Water level measuring and controlling computer module, connection traffic measurement module, depth of water non-contact measurement module, vertical plane flow field non-contact measurement module, for sending measuring control information and receiving and show the measurement data of each module;
Depth of water non-contact measurement module, connects water level measuring and controlling computer module and controlled by it, for gathering water signal, obtains corresponding waterlevel data and uploads water level measuring and controlling computer module;
Flow measurement module, connects water level measuring and controlling computer module and controlled by it, and the flow information recording is uploaded to water level measuring and controlling computer module;
Vertical plane flow field non-contact measurement module, connects water level measuring and controlling computer module and controlled by it, for obtaining synchronous plane information of flow.
2. the contactless turbulent fluctuation structure of unsteady flow in open TT&C system periodically as claimed in claim 1, it is characterized in that, described depth of water non-contact measurement module adopts ultrasonic probe to carry out bathymetric survey except water-level gauge, and water level measuring and controlling computer module gathers ultrasonic probe voltage by AD plate.
3. the contactless turbulent fluctuation structure of unsteady flow in open TT&C system periodically as claimed in claim 1, it is characterized in that, described flow measurement module is usingd frequency converter that controlled frequency the is object speed control device as pump motor, frequency converter connection bit Measurement &control computer module is also controlled by it, water pump connects frequency converter, changes frequency obtain different rotating speeds to control water pump by frequency converter.
4. the contactless turbulent fluctuation structure of unsteady flow in open TT&C system periodically as claimed in claim 1, is characterized in that, in described flow measurement module, between frequency converter and water level measuring and controlling computer module, by AD plate, is connected and is communicated.
5. the contactless turbulent fluctuation structure of unsteady flow in open TT&C system periodically as claimed in claim 1, it is characterized in that, on water supply line between described flow measurement module water pump and tank, settle electromagnetic flowmeter, between electromagnetic flowmeter and water level measuring and controlling computer module, by AD plate, be connected and communicated, the real-time voltage value that AD plate collects electromagnetic flowmeter transfers to water level measuring and controlling computer module.
6. the contactless turbulent fluctuation structure of unsteady flow in open TT&C system periodically as claimed in claim 1, is characterized in that, described vertical plane flow field non-contact measurement module adopts PIV commercial measurement Flow Field Distribution.By isochronous controller, laser instrument, CCD camera, camera card, PIV computing machine forms, for obtaining synchronous plane information of flow.Wherein:
Isochronous controller connects water level measuring and controlling computer module, receives the Transistor-Transistor Logic level signal controlling non-contact measurement module action of water level measuring and controlling computer module;
Laser instrument connects isochronous controller, and when isochronous controller moves, pulsed laser light source forms pulse sheet laser by spherical mirror and cylindrical mirror, illuminates the flow region that needs measurement in flow field;
CCD camera connects isochronous controller, when isochronous controller move, and trace particle visual uploading in the CCD cameras record current downflow region of taking with sheet laser vertical direction;
Camera links and connects PIV computing machine, camera card is stored mutual photo, and image is sent into after PIV computing machine digitizing, and digitized picture matrix in critical region is carried out to computing cross-correlation, obtain the displacement of trace particle in known interval, can obtain thus the velocity information of each point in flow field.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108547250A (en) * | 2018-03-02 | 2018-09-18 | 中国水利水电科学研究院 | Simulation power station Stoplog gate stratified pumping, which is got rid of, increases load test system and method |
| CN112526171A (en) * | 2020-11-13 | 2021-03-19 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
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| JPH04191631A (en) * | 1990-11-27 | 1992-07-09 | Nippon Tetorapotsuto Kk | Reflected wave absorbing type wave making machine control apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547250A (en) * | 2018-03-02 | 2018-09-18 | 中国水利水电科学研究院 | Simulation power station Stoplog gate stratified pumping, which is got rid of, increases load test system and method |
| CN108547250B (en) * | 2018-03-02 | 2023-07-25 | 中国水利水电科学研究院 | Layered water taking, load throwing and increasing experiment system and method for simulating stoplog door of hydropower station |
| CN112526171A (en) * | 2020-11-13 | 2021-03-19 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
| CN112526171B (en) * | 2020-11-13 | 2022-10-21 | 长江水利委员会长江科学院 | Calibration system and method of one-dimensional pulsating flow velocity measuring device |
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Application publication date: 20140326 |