CN203259328U - Periodic non-contact turbulence structure measurement and control system for open-channel non-constant flow - Google Patents

Periodic non-contact turbulence structure measurement and control system for open-channel non-constant flow Download PDF

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Publication number
CN203259328U
CN203259328U CN 201320304029 CN201320304029U CN203259328U CN 203259328 U CN203259328 U CN 203259328U CN 201320304029 CN201320304029 CN 201320304029 CN 201320304029 U CN201320304029 U CN 201320304029U CN 203259328 U CN203259328 U CN 203259328U
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flow
water
module
water level
level measuring
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CN 201320304029
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Chinese (zh)
Inventor
兰艳萍
杨胜发
胡江
付旭辉
李文杰
陈阳
张鹏
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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Abstract

The utility model discloses a periodic non-contact turbulence structure measurement and control system for an open-channel non-constant flow is composed of a water-level measurement and control computer module, a water-depth non-contact measuring module, a flow measuring module, a vertical-surface-flow-filed non-contact measuring module. The measurement and control system can obtain a stable periodic non-constant flow process in any shape, has advantages of fast response speed and infinitely variable speed, and can receive stable and accurate signals, preventing interference of the traditional measuring method on water flows. Moreover, the measurement and control system, with high precision, breaks the limit of spatial single-point flow velocity measurement to instantaneously measure flow information in one plane, and is characterized by being high in spatial resolution and large in quantity of acquired information, and able to continuously perform measurement without interference, so that the continuous and periodic control on the open-channel non-constant flow and the high-frequency non-contact synchronous measurement of flow, water depth and instantaneous flow field are achieved, and strong technical support for experimental research into the open-channel non-constant flow is provided.

Description

The contactless turbulent fluctuation structure of periodicity unsteady flow in open TT﹠C system
Technical field
The utility model belongs to fluid observation and control technology field, relates 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 usually, and are 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 the upstream produces larger impact to the meetings such as differentiation in flood control, navigation condition and the river course of downstream 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 problemss such as harbour, shipping and urban flood defence, all have important theory and engineering significance.But unsteady flow in open problem itself is very complicated, and aspect control method, prior art adopts the system of electromagnetic flowmeter and electric control valve formation more and can regulate weir and carry out the 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 the system that electromagnetic flowmeter and electric control valve consist of and can regulate weir and can carry out the unsteady flow test, measuring accuracy and reaction rate are all undesirable; Secondly, not only reaction rate is slow to adopt traditional water-level gauge and probe aspect level measuring, 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 can't be satisfied the demand of unsteady flow.Simultaneously, although control and analytical measurement that existing some novel controls that occur and measuring equipment can well be realized unsteady flow, due to can't accomplish in measuring process water level, flow and flow velocity synchronously, bring sizable difficulty to data processing etc.
The utility model content
The purpose of this utility model is to provide the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT﹠C system, is intended to solve the prior art precision low, and reaction rate is undesirable, has disturbance, can only spot measurement, and the problem of poor synchronization.
The utility model is achieved in that the contactless turbulent fluctuation structure of a kind of periodicity unsteady flow in open TT﹠C system, by the 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.
The water level measuring and controlling computer module, the connection traffic measurement module, depth of water non-contact measurement module, vertical plane flow field non-contact measurement module is used for the measurement data of sending measuring control information and receiving and show each module;
Depth of water non-contact measurement module connects the water level measuring and controlling computer module and controlled by it, is used for gathering water signal, obtains corresponding waterlevel data and uploads the water level measuring and controlling computer module;
The flow measurement module connects the water level measuring and controlling computer module and controlled by it, and the flow information that records is uploaded the water level measuring and controlling computer module;
Vertical plane flow field non-contact measurement module connects the water level measuring and controlling computer module and controlled by it, is used for obtaining the 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 the water level measuring and controlling computer module gathers ultrasonic probe voltage by the AD plate.
Further, the frequency converter of flow measurement module take controlled frequency as purpose is as the speed control device of pump motor, frequency converter connecting position Measurement ﹠control computer module is also controlled by it, and water pump connects frequency converter, changes frequency by frequency converter and obtains different rotating speeds to control water pump.
Further, be connected by the AD plate between frequency converter and water level measuring and controlling computer module in flow measurement module and communicate.
Further, settle electromagnetic flowmeter on water supply line between flow measurement module water pump and tank, be connected by the AD plate between electromagnetic flowmeter and water level measuring and controlling computer module and communicate, the real-time voltage value that the AD plate collects electromagnetic flowmeter transfers to the 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, the CCD camera, the camera card, the PIV computing machine consists of, and is used for obtaining the synchronous plane information of flow.Wherein:
Isochronous controller connects the 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 move, pulsed laser light source was by spherical mirror and cylindrical mirror formation pulse sheet laser, and illuminating needs the flow region measured in the flow field;
The CCD camera connects isochronous controller, when isochronous controller move, and trace particle visual and uploading in the CCD cameras record current downflow zone of taking with the sheet laser vertical direction;
Camera links and connects the PIV computing machine, the mutual photo of camera card storage after image is sent into PIV computing machine and digitizing, carries out computing cross-correlation to digitized picture matrix in critical region, obtain the displacement of trace particle in known interval, can obtain thus the velocity information of each point in the flow field.
The flow measurement module is by adopting the frequency converter take controlled frequency as purpose to obtain periodicity unsteady flow process stable, arbitrary shape as the speed control device of pump motor, compares motorized valve and has that reaction velocity is fast, advantage that can electrodeless variable-speed; The water level measuring and controlling computer module communicates by the connection of AD plate, makes picked up signal more stable accurately; Settle the electromagnetic flowmeter survey actual flow to check on water supply line between flow measurement module water pump and tank, prevented the error that the 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 on a plane of instantaneous measurement, have that spatial resolution is high, the obtaining information amount is large and the characteristics of noiseless continuous coverage.
Description of drawings
Fig. 1 is the contactless turbulent fluctuation structure of the periodicity unsteady flow in open TT﹠C system work structuring schematic diagram that the utility model provides.
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 utility model 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 is used for the measurement data of sending measuring control information and receiving and show each module;
Depth of water non-contact measurement module 2 connects water level measuring and controlling computer module 1 and controlled by it, is used for gathering water signal, obtains corresponding waterlevel data and uploads water level measuring and controlling computer module 1;
Flow measurement module 3 connects water level measuring and controlling computer module 1 and controlled by it, and the flow information that records is uploaded 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, is used for obtaining the 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 the AD plate.
Further, the frequency converter 3-2 of flow measurement module 3 take controlled frequency as purpose is as the speed control device of water pump 3-1 motor, frequency converter 3-2 connecting position Measurement ﹠control computer module 1 is also controlled by it, water pump 3-1 connects frequency converter 3-2, changes frequency by frequency converter 3-2 and obtains different rotating speeds to control water pump 3-1.
Further, be connected by the AD plate between frequency converter 3-2 and water level measuring and controlling computer module 1 in flow measurement module 3 and communicate.
Further, settle electromagnetic flowmeter on water supply line between flow measurement module 3 water pump 3-1 and tank, be connected by the AD plate between electromagnetic flowmeter and water level measuring and controlling computer module 1 and communicate, the real-time voltage value that the 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 consists of, and is used for obtaining the 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 move, pulsed laser light source was by spherical mirror and cylindrical mirror formation pulse sheet laser, and illuminating needs the flow region measured in the flow field;
CCD camera 4-3 connects isochronous controller 4-1, when isochronous controller 4-1 move, and trace particle visual and uploading in the CCD cameras record current downflow zone of taking with the sheet laser vertical direction;
Camera card 4-4 connects PIV computing machine 4-5, camera card 4-4 stores mutual photo, after image is sent into PIV computing machine 4-5 and digitizing, digitized picture matrix in critical region is carried out computing cross-correlation, obtain the displacement of trace particle in known interval, can obtain thus the velocity information of each point in the flow field.
When needs carried out fluid-velocity survey, the water level measuring and controlling computer module 1 in this pilot system was by built-in water level and flow control programmed control depth of water non-contact measurement module 2, flow measurement module 3, vertical plane flow field non-contact measurement module 4 work.Depth of water non-contact measurement module 2 carry out level measuring and, flow measurement module 3 is carried out flow collection, simultaneously water level measuring and controlling computer module 1 sends the Transistor-Transistor Logic level signal to the isochronous controller 4-1 in vertical plane flow field non-contact measurement module 4, 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 each time is corresponding clear and definite water level sampling and the time all.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (6)

1. the contactless turbulent fluctuation structure of a periodicity unsteady flow in open TT﹠C system, is characterized in that, the contactless turbulent fluctuation structure of described periodicity unsteady flow in open TT﹠C system comprises:
The water level measuring and controlling computer module, the connection traffic measurement module, depth of water non-contact measurement module, vertical plane flow field non-contact measurement module is used for the measurement data of sending measuring control information and receiving and show each module;
Depth of water non-contact measurement module connects the water level measuring and controlling computer module and controlled by it, is used for gathering water signal, obtains corresponding waterlevel data and uploads the water level measuring and controlling computer module;
The flow measurement module connects the water level measuring and controlling computer module and controlled by it, and the flow information that records is uploaded the water level measuring and controlling computer module;
Vertical plane flow field non-contact measurement module connects the water level measuring and controlling computer module and controlled by it, is used for obtaining the 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 the water level measuring and controlling computer module gathers ultrasonic probe voltage by the 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, the frequency converter of described flow measurement module take controlled frequency as purpose is as the speed control device of pump motor, frequency converter connecting position Measurement ﹠control computer module is also controlled by it, and water pump connects 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, is connected by the AD plate between frequency converter and water level measuring and controlling computer module in described flow measurement module to communicate.
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, settle electromagnetic flowmeter on water supply line between described flow measurement module water pump and tank, be connected by the AD plate between electromagnetic flowmeter and water level measuring and controlling computer module and communicate, the real-time voltage value that the AD plate collects electromagnetic flowmeter transfers to the 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, the camera card, the PIV computing machine consists of.
CN 201320304029 2013-05-24 2013-05-24 Periodic non-contact turbulence structure measurement and control system for open-channel non-constant flow Expired - Fee Related CN203259328U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314040A (en) * 2014-10-28 2015-01-28 重庆交通大学 System and method for using river model to measure open channel turbulence long structure
CN110146123A (en) * 2018-06-13 2019-08-20 宁波大学 A kind of open channel water delivery monitoring system based on multi-information fusion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314040A (en) * 2014-10-28 2015-01-28 重庆交通大学 System and method for using river model to measure open channel turbulence long structure
CN104314040B (en) * 2014-10-28 2017-01-18 重庆交通大学 System and method for using river model to measure open channel turbulence long structure
CN110146123A (en) * 2018-06-13 2019-08-20 宁波大学 A kind of open channel water delivery monitoring system based on multi-information fusion
CN110146123B (en) * 2018-06-13 2021-04-06 宁波大学 Open channel water delivery monitoring method based on multi-information fusion

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Granted publication date: 20131030

Termination date: 20140524