CN210625738U - Strain sensing type water metering device based on micro-cantilever beam - Google Patents
Strain sensing type water metering device based on micro-cantilever beam Download PDFInfo
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- CN210625738U CN210625738U CN201921973169.XU CN201921973169U CN210625738U CN 210625738 U CN210625738 U CN 210625738U CN 201921973169 U CN201921973169 U CN 201921973169U CN 210625738 U CN210625738 U CN 210625738U
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Abstract
The utility model discloses a sensing formula water metering device meets an emergency based on little cantilever beam, including being located the inside vertical uniform cross section elasticity straight-bar of placing of pipeline and being located the pipeline outside and having the strain measurement, velocity of flow calculation and result display function's calculation display module, the pipeline is internal to be located the bottom and still is provided with pressure sensor, and one section hollow rectangular tube that is in the upper end of elasticity straight-bar, and at least one resistance strain gauge has been posted on the inside pipe wall of rectangular tube and the perpendicular corresponding face of rivers direction, the utility model discloses an arrange the elasticity straight-bar in the resistance strain gauge, avoided the direct contact of resistance strain gauge and liquid to eliminate the influence that the fluid caused to the resistance strain gauge, improved measurement accuracy, can be used for among the pipeline rivers data measurement.
Description
Technical Field
The utility model relates to a metering device, in particular to water metering device.
Background
The water metering device is mainly used for measuring the water flow in a pipeline or an open channel. In practical application, different types of flowmeters are adopted for flow monitoring and statistics according to the conditions of use places. In general, the metering method of the fluid flow rate includes a velocity method, a volume method, and a mass method. The velocity method comprises the steps of measuring the average flow velocity of fluid and multiplying the average flow velocity by the water flow cross section to obtain the volume flow of the fluid, wherein the volume flow of the fluid comprises a differential pressure type flowmeter, a rotor flowmeter, an electromagnetic flowmeter, an ultrasonic flowmeter and the like; the volumetric method is to measure the flowing medium continuously in standard fixed volume in unit time, and calculate the flow rate by the fixed volume number of the discharged fluid, and comprises an elliptic gear flowmeter, a piston flowmeter, a scraper flowmeter and the like; the detection of mass flow is divided into a direct method and an indirect method: the direct method measures mass flow directly, such as angular momentum type, calorimetric type and Coriolis type, and the indirect method measures volume flow and fluid density simultaneously to automatically calculate mass flow.
The flow measurement method has the characteristics of complex structure and high price, and some methods also provide certain requirements for water quality. Therefore, the method is not suitable for being popularized in the fields which need a large amount of water metering facilities and have complex water quality, such as agricultural irrigation water metering and the like. Under the premise, an electric water conversion method is adopted in many places for rough estimation. The method for calculating the water consumption according to the power consumption of the water pump has large errors, and is not beneficial to popularization of agricultural water price reformation. Therefore, it is necessary to provide a water metering method with low cost and accurate calculation.
The prior art has applied for a cantilever beam strain sensing type flow velocity and flow measurement device and an application method, and the application number is as follows: 2019108063637, filing date: 2019/8/29, the disadvantage is that the resistive strain gages are located on the outer wall, which can cause the core resistive strain gages to be affected by moisture or corrosion during the measurement process, thereby increasing the complexity of the design of the package.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sensing formula of meeting an emergency water metering device based on little cantilever beam eliminates the influence that the fluid caused resistance strain gauge, improves measurement accuracy.
The purpose of the utility model is realized like this: the utility model provides a strain sensing formula water metering device based on little cantilever beam, is including lieing in the inside vertical constant cross section elasticity straight-bar of placing of pipeline and lieing in the outside calculation display module who has strain measurement, velocity of flow/flow calculation and result display function of pipeline, it still is provided with pressure sensor still to lie in the bottom in the pipeline, one section upper end of elasticity straight-bar is hollow rectangular pipe, it has at least one resistance foil gage to paste on the inside pipe wall of rectangular pipe and the perpendicular corresponding face of rivers direction.
Compared with the prior art, the beneficial effects of the utility model reside in that, the utility model discloses a pressure sensor measures the rivers degree of depth for the degree of depth measurement is convenient more reliable, through arranging the elasticity straight-bar in with the resistance strain piece, the direct contact of resistance strain piece with liquid has been avoided, thereby eliminate the influence that the fluid caused to the resistance strain piece, measurement accuracy has been improved, simultaneously owing to left out encapsulation protection, its major structure is very simple, do benefit to the installation, only need set up the aperture at the pipeline top that awaits measuring, insert the pipeline with the elastic rod, and carry out the top fixed and can begin work. The invention can be used for measuring the water flow data of the pipeline.
In order to ensure that the data transmission is more reliable, the resistance strain gauge and the pressure sensor are connected with an external calculation display module through leads, and the strain change and the water pressure are respectively input into the calculation display module.
In order to make the data calculation more reliable, the calculation display module comprises a strain test circuit, a pressure test circuit and a flow speed and flow display circuit.
In order to further improve the measurement precision, the strain gauge sensitive grid is pasted along the axial direction of the rectangular pipe.
Drawings
Fig. 1 is a schematic view of the installation structure of the present invention.
Fig. 2 is the installation schematic diagram of the total resistance strain gauge of the present invention.
Wherein, 1 is the elastic rod, 2 is pressure sensor, 3 is the flow display appearance, 4 is the foil gage, 5 is the test circuit of meeting an emergency, 6 is the pressure test circuit, 7 is velocity of flow, flow display circuit.
Detailed Description
As shown in fig. 1-2, the strain sensing type water metering device based on the micro cantilever beam comprises an elastic straight rod 1 with uniform cross section vertically arranged in the pipeline and a calculation and display module with strain measurement, flow velocity/flow calculation and result display functions arranged outside the pipeline, wherein a pressure sensor 2 is also arranged at the bottom in the pipeline, one section of the upper end of the elastic straight rod 1 is a hollow rectangular pipe, two resistance strain gauges 4 are attached to the corresponding surfaces of the inner pipe wall of the rectangular pipe, which are vertical to the water flow direction, the sensitive grids of the resistance strain gauges 4 are attached along the axial direction of the rectangular pipe, the resistance strain gauges 4 and the pressure sensor 2 are connected with the external calculation and display module through a lead, and the strain change and the water pressure are respectively input into a calculation display module, and the calculation display module comprises a strain test circuit 5, a pressure test circuit 6 and a flow speed and flow display circuit 7.
The utility model discloses application method as follows:
(1) the water flow of the pipeline impacts the elastic rod 1 with the rectangular section to deform the elastic rod;
(2) the deformation is converted into a strain value through the strain gauge 4 and is transmitted to an external machine through a line;
(3) the water depth is transmitted to an external instrument through the pressure sensor 2;
(4) the system calculates the flow velocity of water flow in the pipeline according to the strain value and the water depth of the elastic rod 1 in the pipeline, and calculates the flow Q of the water flow;
(5) four three values can be displayed on the external instrument: the strain value of the metal sheet, the numerical flow rate of the water depth, the real-time flow value and the accumulated flow value.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (4)
1. The utility model provides a strain sensing formula water metering device based on little cantilever beam, is including lieing in the inside vertical constant cross section elasticity straight-bar of placing of pipeline and lieing in the outside calculation display module that has strain measurement, velocity of flow/flow calculation and result display function of pipeline, its characterized in that, it still is provided with pressure sensor to lie in the bottom in the pipeline, one section upper end of elasticity straight-bar is hollow rectangular pipe, at least one resistance strain gauge has been pasted on the inside pipe wall of rectangular pipe and the perpendicular corresponding face of rivers direction.
2. The micro-cantilever based strain sensing water metering device of claim 1, wherein the resistance strain gauge and the pressure sensor are connected to an external computing and displaying module through wires, and respectively input strain variation and water pressure to the computing and displaying module.
3. The micro-cantilever based strain sensing water meter according to claim 2, wherein the computing and display module comprises a strain test circuit, a pressure test circuit, and a flow rate and flow rate display circuit.
4. The micro-cantilever based strain sensing water metering device according to any one of claims 1-3, wherein the resistive strain gage sensing grid is affixed axially along the rectangular tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921973169.XU CN210625738U (en) | 2019-11-15 | 2019-11-15 | Strain sensing type water metering device based on micro-cantilever beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921973169.XU CN210625738U (en) | 2019-11-15 | 2019-11-15 | Strain sensing type water metering device based on micro-cantilever beam |
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| CN210625738U true CN210625738U (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114373282A (en) * | 2022-01-21 | 2022-04-19 | 四川大学 | Debris flow early warning device and early warning method thereof |
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2019
- 2019-11-15 CN CN201921973169.XU patent/CN210625738U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114373282A (en) * | 2022-01-21 | 2022-04-19 | 四川大学 | Debris flow early warning device and early warning method thereof |
| CN114373282B (en) * | 2022-01-21 | 2023-02-28 | 四川大学 | Debris flow early warning device and early warning method thereof |
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