CN111089627A - Multi-resolution open channel automatic flow measuring device based on area flow velocity method - Google Patents
Multi-resolution open channel automatic flow measuring device based on area flow velocity method Download PDFInfo
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- CN111089627A CN111089627A CN201911333331.6A CN201911333331A CN111089627A CN 111089627 A CN111089627 A CN 111089627A CN 201911333331 A CN201911333331 A CN 201911333331A CN 111089627 A CN111089627 A CN 111089627A
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- open channel
- flow measurement
- automatic flow
- fixing piece
- stepping motor
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- 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
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
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- 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
- G01F1/05—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 using mechanical effects
- G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
- G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/37—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes
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- 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
- G01F1/05—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 using mechanical effects
- G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
- G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
- G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter
- G01P5/165—Arrangements or constructions of Pitot tubes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
An automatic flow measuring device of multi-resolution open channel based on area flow velocity method, the automatic flow measuring device is that one end of the automatic flow measuring aluminum alloy frame is provided with a stepping motor and a synchronizing wheel thereof, the other end is provided with a synchronizing wheel corresponding to the stepping motor, a synchronous belt is fixed between the two synchronizing wheels, two ends of a fixing piece are respectively fixed with two polished rods which are in the same parallel horizontal, and the fixing piece moves along the horizontal direction under the driving of the synchronous belt along the two parallel horizontal polished rods; the same two vertical polished rods are fixed above the fixing piece, the lifting plate is fixed together with the two vertical polished rods and the screw rod, the stepping motor, the screw rod and the pitot tube are fixed below the fixing piece, the lifting plate drives the pitot tube to move up and down along the screw rod and the two vertical polished rods under the action of the stepping motor, different grids are divided in the water flow going deep into the open channel to realize multi-resolution flow measurement, the time is saved, the flow measurement precision is improved, and the automatic flow measurement device is particularly suitable for automatic flow measurement of different types of open channel channels such as rectangles, U-shaped channels and trapezoidal channels.
Description
Technical Field
The invention relates to an automatic open channel flow measuring device, in particular to a multi-resolution automatic open channel flow measuring device based on an area flow velocity method.
Background
The existing flow measuring device consists of a sensor, a pressure sheet vertical to the water surface, a pressure sheet parallel to the water surface and a ball screw motor; the flow measuring method comprises the following steps: 1) measuring the flow velocity: the flow velocity of a measuring point is calculated by the pressure difference of the hydrodynamic pressure and the hydrostatic pressure measured by the two pressure sensors through the Bernoulli equation, and the flow velocity of each measuring point can be obtained according to the method; 2) measuring the linear flow velocity: respectively calculating the flow velocity of the submerged measuring points according to the number of the measuring points of the submerged sensor, and weighting and averaging the flow velocity of each measuring point to obtain the flow velocity of the measuring line; 3) surface flow velocity measurement: the flow velocity of the second and third … Nth measuring lines is obtained by the transverse automatic movement of the mechanical transmission mechanism, the flow velocity of the measuring surface is obtained by the weighted average of the flow velocities of the N measuring lines, the flow of the rectangular section is obtained by the formula Q = AV, wherein v is the average flow velocity of the rectangular section, A is the area of the rectangular section, although the device realizes the automatic flow measurement, the flow velocity measured by the method can not well reflect the average flow velocity of the whole section because the pressure sheet of the device is fixed at the corresponding characteristic point of each measuring line with different flow rates, and the measuring plate of the pressure sheet of the device is wider and has larger resistance to water flow, and the measuring plate is required to move underwater according to the flow measuring steps during measurement, so the influence on water flow is large, and the flow measuring precision is difficult to guarantee.
Disclosure of Invention
The invention aims to solve the specific technical problems that the resistance to water flow is large during measurement, so that the flow measurement precision is influenced; secondly, because the flow is different and the average velocity of flow is difficult to obtain accurate flow measurement, its purpose is to provide a multiresolution open channel automatic flow measurement device based on the area velocity of flow method.
In order to achieve the above object, the present invention adopts the following technical solutions.
A multi-resolution open channel automatic flow measuring device based on an area flow velocity method comprises an open channel automatic flow measuring aluminum alloy frame, a polished rod, a synchronous belt, a fixing piece, a synchronous wheel, a stepping motor, a pitot tube, a differential pressure sensor and a lifting plate; the method is characterized in that:
one end of the automatic flow measurement aluminum alloy frame of the open channel with a support and a level gauge is provided with a stepping motor II and a synchronizing wheel II thereof; the other end of the synchronous pulley is provided with a synchronous pulley I corresponding to the synchronous pulley I, and a synchronous belt is fixed between the synchronous pulley I and the synchronous pulley II through the fixing piece; two polished rods which are the same in parallel and horizontal are respectively arranged at two ends of the fixing piece and fixed by the polished rod fixing piece, and the polished rods move along the horizontal direction under the driving of the synchronous belt;
two vertical polish rods are fixed above the fixing piece, and the lifting plate is fixed with the two vertical polish rods and a screw rod thereof; a stepping motor I is fixed below the fixing piece and connected with the screw rod, a pitot tube is fixed on the lifting plate, and the pitot tube moves up and down along the screw rod and the two vertical polish rods under the action of the stepping motor I;
the pitot tube is driven by a stepping motor to penetrate into the water flow of the open channel to perform different grids divided by transverse and longitudinal displacement so as to realize multi-resolution flow measurement.
Further additional features are as follows.
The utility model provides an automatic flow measurement device of multiresolution open channel based on area velocity of flow method which characterized in that: the support is a supporting seat which is arranged at four corners of the automatic flow measurement aluminum alloy frame of the open channel and is adjusted by matching with a level meter.
The utility model provides an automatic flow measurement device of multiresolution open channel based on area velocity of flow method which characterized in that: the gradienters are arranged on the automatic flow measurement aluminum alloy frame of the open channel and adjust the whole device to be horizontal in two directions.
The utility model provides an automatic flow measurement device of multiresolution open channel based on area velocity of flow method which characterized in that: the open channel automatic flow measurement method of the multi-resolution open channel automatic flow measurement device based on the area flow velocity method comprises the steps of placing the open channel automatic flow measurement device on an open channel, adjusting a horizontal flow measurement device through a support, then switching on a power supply, using the grid division function of an upper computer, dividing grids by using the interval of measurement points and the number of the grids, inputting parameters in a corresponding frame at the rear edge, clicking on an interface of the upper computer to start flow measurement, automatically moving a pitot tube horizontally and vertically along the whole water flow section under the driving of a stepping motor to start measurement, automatically collecting all grid flow velocities, and simultaneously transmitting the grid flow velocities to the upper computer through a differential pressure sensor.
Compared with the prior art, the automatic flow measuring device for the multi-resolution open channel based on the area flow velocity method has the advantages that the pitot tube in the whole automatic flow measuring device is the only flow measuring component entering the water body, so that the problem that the flow measuring precision is reduced due to the interference of the existing device on water flow is solved; the device of the invention divides different grids for flow measurement according to the actual flow measurement requirement to realize multi-resolution flow measurement, thus ensuring the required flow measurement precision under the condition of saving time; the device can measure channels of different types such as rectangular channels, U-shaped channels and trapezoidal channels through the design of different programs without paying attention to whether the types of the fluids meet the condition of uniform flow.
Drawings
Fig. 1 is a schematic structural view of the multi-point automatic flow measuring device for the open channel.
FIG. 2 is a schematic diagram of a U50 rectangular channel structure according to the present invention.
FIG. 3 is a flow chart of the flow measurement system of the present invention.
Fig. 4 is a rectangular open channel automatic detection system based on a pressure sensor.
In the figure: 1: a support; 2: a nut; 3: an open channel automatic flow measurement aluminum alloy frame; 4: a level gauge; 5: a parallel horizontal polish rod I; 6: a synchronous belt; 7: a polished rod fixing part; 8: a synchronous wheel I; 9. a stepping motor I; 10: a pitot tube; 11: a step motor II; 12: a synchronous wheel II; 13: a differential pressure sensor; 14: a fixing member; 15: lifting the plate; 16: a screw rod; 17: and a vertical polish rod II.
Detailed Description
The following provides a further detailed description of specific embodiments of the present invention.
Implementing a multi-resolution open channel automatic flow measuring device based on an area flow velocity method, which comprises a support 1, a nut 2, an open channel automatic flow measuring aluminum alloy frame 3, a level meter 4, a parallel horizontal polish rod I5, a synchronous belt 6, a polish rod fixing piece 7, a synchronous wheel I8, a stepping motor I9, a pitot tube 10, a stepping motor II 11, a synchronous wheel II 12, a differential pressure sensor 13, a fixing piece 14, a lifting plate 15, a lead screw 16 and a vertical polish rod II 17; wherein, four corners of the open channel automatic flow measurement aluminum alloy frame 3 are provided with supports 1, a level meter 4 is arranged on the supports, and one end of the open channel automatic flow measurement aluminum alloy frame is provided with a stepping motor II 11 and a synchronizing wheel II 12 thereof; the other end is provided with a synchronous wheel I8 corresponding to the synchronous wheel I, and a synchronous belt 6 is fixed between the synchronous wheel I8 and the synchronous wheel II 12 through a fixing piece 14; two polish rods 5 which are arranged at two ends of the fixing piece 14 and are in the same parallel and horizontal are fixed through a polish rod fixing piece 7 and move along the two polish rods 5 which are in the parallel and horizontal direction under the drive of the synchronous belt 6.
Two vertical polish rods 17 are fixed above the fixing piece 14, and the lifting plate 15 is fixed with the two vertical polish rods 17 and the lead screws 16 thereof; a stepping motor I9 is fixed below the fixing piece 14 and connected with a screw rod 16, a pitot tube 10 is fixed on the lifting plate 15, and the pitot tube moves up and down along the screw rod 16 and two vertical polished rods 17 under the action of the stepping motor I9.
The pitot tube 10 is driven by a stepping motor to penetrate into the water flow of the open channel to perform different grids divided by transverse and longitudinal displacement so as to realize multi-resolution flow measurement.
In the above embodiment, the support 1 is a support seat arranged at four corners of the automatic flow measurement aluminum alloy frame 3 for the open channel and adjusted by matching with the level meter 4.
In the above embodiment, the gradienter 4 is a two-direction gradienter arranged on the automatic flow measurement aluminum alloy frame 3 of the open channel to adjust the whole device to be horizontal.
In the above embodiment, the open channel automatic flow measurement method of the multi-resolution open channel automatic flow measurement device based on the area flow velocity method is to place the open channel automatic flow measurement device on an open channel, adjust the horizontal flow measurement device through the support 1, then switch on the power supply, use the mesh division function of the upper computer, divide the meshes by using the measurement point intervals and the mesh number, input parameters in the corresponding frame at the back edge, click to start flow measurement on the interface of the upper computer, the pitot tube 10 automatically moves horizontally and vertically along the whole water cross section under the drive of the stepping motors 9 and 11, starts to measure, automatically collects all the mesh flow velocities, and simultaneously transmits the mesh flow velocities to the upper computer through the differential pressure sensor.
Example 1
As shown in attached drawings 1, 2, 3 and 4, the technical scheme of implementing the multi-resolution open channel automatic flow measuring device based on the area flow velocity method provided by the invention comprises the following steps that four supports 1 support four materials which are the same as aluminum alloy 3, two long aluminum alloy rods, two short aluminum alloy rods form the whole device supporting part, wherein two long aluminum alloy frames are placed in the direction vertical to the water flow direction, two short aluminum alloy frames are placed in the direction parallel to the water flow direction, two gradienters 4 are respectively placed on one long aluminum alloy frame and one short aluminum alloy frame, the gradienters 4 in two directions are matched with the supports 1 to be adjusted to be in the horizontal position with nuts 2, two polished rods which are the same as the polished rods 5 are fixed on the two short aluminum alloy frames by four fixing pieces which are the same as the fixing pieces 7, a stepping motor 11 is arranged between the two fixing pieces at one end, the synchronous wheel 12 is arranged on the motor, the other end of the synchronous wheel 8 is fixed with the corresponding synchronous wheel, the two synchronous wheels are connected through the synchronous belt, the synchronous belt 6 and the fixing piece 14 are fixed together, two ends of the fixing piece 14 are respectively arranged on the polish rods identical to the polish rods 5, the fixing piece 14 can horizontally move along the polish rods 5 under the action of the synchronous belt, two polish rods identical to the polish rods 17 and a lead screw 16 are fixed above the fixing piece 14, the lifting plate 15 and the three rods are fixed together, the stepping motor is fixed below the fixing piece 14 and connected with the lead screw 16, the pitot tube 10 is fixed on the lifting plate 15, and the pitot tube 10 is driven by the lifting plate 15 to move up and down along the lead screw 16 and the polish rods 17 under the action of the stepping motor 9.
When the flow measurement is carried out by the specific implementation device, the whole device is placed on a channel at first, whether bubbles in two gradienters are centered or not is observed, if the bubbles are centered, the measuring device is in a horizontal state, the next step of operation is carried out, if the bubbles are not centered, the heights of the four supports are adjusted to enable the bubbles to be centered, then a power supply is switched on to start measurement, and measurement data are transmitted to a computer or other equipment through a sensor in real time.
This device divides into a plurality of grids with the water cross section of channel through the meshing in the host computer software interface, then clicks and begins to measure, and the pitot tube moves to the center of grid 1 under the stepper motor removes the drive as shown in figure 2, and the pitot tube is here surveyed two values: liquid level height h of side small hole of pitot tube1And the liquid level of the front end small hole is high2Wherein h is1Represents the hydrostatic pressure at 1
To pass the horizontal plane at 1 through the reference plane, the total energy at 1 point
(ii) a So according to the formula
Then grid 1' s
The flow is calculated and displayed on the interface of the equipment, and similarly, the Pitot tube is sequentially moved to 2, 3 and 4 … … 20, and the flow Q is calculated2、Q3……Q20Finally, the flow of the positive section is measured
(i =1, 2, 3 … … 20), the flow rate of the entire segment is automatically calculated.
Claims (4)
1. A multi-resolution open channel automatic flow measuring device based on an area flow velocity method comprises an open channel automatic flow measuring aluminum alloy frame, a polished rod, a synchronous belt, a fixing piece, a synchronous wheel, a stepping motor, a pitot tube, a differential pressure sensor and a lifting plate; the method is characterized in that:
one end of the open channel automatic flow measurement aluminum alloy frame (3) with a support (1) and a level gauge (4) is provided with a stepping motor II (11) and a synchronizing wheel II (12) thereof; the other end of the synchronous pulley is provided with a synchronous pulley I (8) corresponding to the synchronous pulley I, and a synchronous belt (6) is fixed between the synchronous pulley I (8) and the synchronous pulley II (12) through a fixing piece (14); two polished rods (5) which are the same in parallel and horizontal are respectively arranged at two ends of the fixing piece (14) and are fixed through a polished rod fixing piece (7), and the polished rods move along the two polished rods (5) which are parallel and horizontal under the drive of a synchronous belt (6) along the horizontal direction;
two vertical polish rods (17) are fixed above the fixing piece (14), and the lifting plate (15) is fixed with the two vertical polish rods (17) and a screw rod (16) thereof; a stepping motor I (9) is fixed below the fixing piece (14) and connected with a screw rod (16), a pitot tube (10) is fixed on the lifting plate (15), and the pitot tube moves up and down along the screw rod (16) and two vertical polish rods (17) under the action of the stepping motor I (9);
the pitot tube (10) is driven by a stepping motor to penetrate into the water flow of the open channel to perform different grids divided by transverse and longitudinal displacement so as to realize multi-resolution flow measurement.
2. The area flow rate method-based multi-resolution open channel automatic flow measurement device according to claim 1, wherein: the support (1) is a supporting seat which is arranged at four corners of the automatic flow measurement aluminum alloy frame (3) of the open channel and is adjusted by matching with the level meter (4).
3. The area flow rate method-based multi-resolution open channel automatic flow measurement device according to claim 1, wherein: the gradienters (4) are arranged on the automatic flow measurement aluminum alloy frame (3) of the open channel in two directions and adjust the whole device to be horizontal.
4. The area flow rate method-based multi-resolution open channel automatic flow measurement device according to claim 1, wherein: the open channel automatic flow measurement method of the multi-resolution open channel automatic flow measurement device based on the area flow velocity method comprises the steps of placing the open channel automatic flow measurement device on an open channel, adjusting a horizontal flow measurement device through a support (1), then switching on a power supply, using the grid division function of an upper computer, dividing grids by using the interval of measurement points and the number of the grids, inputting parameters in a corresponding frame at the rear edge, clicking on an interface of the upper computer to start flow measurement, automatically moving a pitot tube (10) horizontally and vertically along the whole water cross section under the driving of stepping motors (9 and 11) to start measurement, automatically collecting all grid flow velocities, and simultaneously transmitting the flow velocities to the upper computer through a differential pressure sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911333331.6A CN111089627A (en) | 2019-12-23 | 2019-12-23 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
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| CN201911333331.6A CN111089627A (en) | 2019-12-23 | 2019-12-23 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284462A (en) * | 2020-11-04 | 2021-01-29 | 水利部牧区水利科学研究所 | Portable final-stage canal system irregular section flow measuring device |
| CN113124951A (en) * | 2021-03-30 | 2021-07-16 | 太原理工大学 | Automatic flow measuring device for transverse swing rod type open channel |
| CN113639806A (en) * | 2021-10-19 | 2021-11-12 | 交通运输部天津水运工程科学研究所 | Automatic measuring device and measuring method for irrigation branch channel flow |
-
2019
- 2019-12-23 CN CN201911333331.6A patent/CN111089627A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284462A (en) * | 2020-11-04 | 2021-01-29 | 水利部牧区水利科学研究所 | Portable final-stage canal system irregular section flow measuring device |
| CN112284462B (en) * | 2020-11-04 | 2024-04-02 | 水利部牧区水利科学研究所 | Portable flow measuring device with irregular cross section for final-stage canal system |
| CN113124951A (en) * | 2021-03-30 | 2021-07-16 | 太原理工大学 | Automatic flow measuring device for transverse swing rod type open channel |
| CN113124951B (en) * | 2021-03-30 | 2023-02-14 | 太原理工大学 | Automatic flow measuring device for transverse swing rod type open channel |
| CN113639806A (en) * | 2021-10-19 | 2021-11-12 | 交通运输部天津水运工程科学研究所 | Automatic measuring device and measuring method for irrigation branch channel flow |
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