CN219301749U - Machine vision channel flow measurement equipment calibration device - Google Patents
Machine vision channel flow measurement equipment calibration device Download PDFInfo
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- CN219301749U CN219301749U CN202223005975.2U CN202223005975U CN219301749U CN 219301749 U CN219301749 U CN 219301749U CN 202223005975 U CN202223005975 U CN 202223005975U CN 219301749 U CN219301749 U CN 219301749U
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- 238000005259 measurement Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 abstract description 20
- 108091006146 Channels Proteins 0.000 abstract 6
- 102000010637 Aquaporins Human genes 0.000 abstract 1
- 108010063290 Aquaporins Proteins 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model relates to the technical field of water conservancy informatization, in particular to a calibration device of a machine vision channel flow measurement device, which comprises: the flow calibration device comprises an electronic balance, a tray arranged on the electronic balance and the electronic balance arranged on the tray; channel water flow circulating device, channel water flow circulating device includes the platform support to and outlet pipe, channel, water tank, inlet tube and the water pump of setting on the platform support. In the utility model, the flow of the water flow in the channel can be measured when the water flow flows relatively stably in the channel, and the flow calibration can be performed by using a standard mass method after the water flow flows out of the water inlet pipe, so that the measuring device has the advantages of accurate flow measurement, higher measuring result precision, small volume, convenience for quick flow calibration on site, capability of changing the flow measurement of the channels with different sections, and capability of meeting the different flow measurement requirements of the water conservancy industry.
Description
Technical Field
The utility model relates to the technical field of water conservancy informatization, in particular to a calibration device for machine vision channel flow measurement equipment.
Background
With the rapid development of information technology and image processing technology, the image, optical and radar-based flow measurement method is increasingly widely applied, and in particular, the image-based non-contact flow measurement method is gradually the optimal product for flow measurement due to simplicity, high efficiency and rapidness. The channel flow velocity estimation method based on the image method mostly detects the moving distance of the detection buoy and the tracer particles through a target tracking algorithm to calculate the flow velocity of the water flow surface, and then obtains the cross-sectional area according to the water level to finally calculate the flow. Because these equipment can't carry out accurate demarcation, so research and development demarcation equipment is imperative.
The main method for calibrating the channel flow under the laboratory condition mainly comprises the following steps: 1. standard volumetric method; 2. standard mass method; 3. standard flow meter method; wherein the standard mass method is to measure the mass of the water flowing into the container by weighing the mass with an electronic balance for a certain period of time. The high-precision electronic balance can acquire the water mass, and the measurement time of the standard mass method can be accurately acquired by reading the water frame by frame based on video. Therefore, the metering calibration of the channel water flow equipment can be realized by using a standard mass method.
The device is designed aiming at the problems, and channels with different sections can be replaced according to the needs so as to meet the water flow measurement needs of the channels with different sections; the calibration device for the channel flow measurement equipment based on machine vision is capable of achieving calibration of channel flow measurement coefficients based on machine vision, solving the problem that channel flow measurement of different sections is difficult to accurately calibrate by a machine vision technology.
Disclosure of Invention
The utility model aims to provide a calibration device for machine vision channel flow measurement equipment, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a machine vision channel flow measurement device calibration apparatus, comprising:
the flow calibration device comprises an electronic balance, a tray arranged on the electronic balance and the electronic balance arranged on the tray;
the flow calibration device is characterized in that when water flows out from a water outlet pipe, the weighing container is used for obtaining the water quality in a period of time, the electronic balance with the tray is placed on the electronic balance for clearing and peeling before the weighing container is used, no water drops overflow in the process of obtaining the water quality by the weighing container, the operation is carried out under the video recording of the camera, the time when the weighing container obtains the water quality can be accurately obtained through time measurement software, the electronic balance can accurately obtain the water weight, and therefore the flow of the flow calibration device can be obtained;
the channel water flow circulating device comprises a platform bracket, a water outlet pipe, a channel, a water tank, a water inlet pipe and a water pump, wherein the water outlet pipe, the channel, the water tank, the water inlet pipe and the water pump are arranged on the platform bracket;
the channel flow circulating device pumps water from the water outlet pipe into the water inlet pipe under the operation of the water pump, and water in the water inlet pipe overflows from the weir crest after flowing into the water tank, and overflowed water enters the replaceable channel;
the replaceable channels in the channel flow circulating device are operated based on the platform support, the platform support is designed according to channels with different sections which can be installed, and channels with different sections such as rectangular, trapezoidal, U-shaped and the like can be replaced according to requirements, so that the flow measurement requirements of the water conservancy industry are met;
the machine vision flow measuring device comprises a water gauge and a corresponding machine vision flow velocity measuring system;
the machine vision flow speed measuring system is used for measuring the water level at the moment by utilizing machine vision or a water gauge after water flow enters the replaceable channel, obtaining the surface flow velocity under the machine vision speed measuring system, obtaining the cross-sectional area of the rectangular channel at the moment under the condition that the water level is known, and obtaining the flow at the moment by utilizing a water level-flow velocity area method.
Compared with the prior art, the utility model has the beneficial effects that:
in the measuring process, channel water flow is pumped out by a water pump from a pipeline outlet and pumped to a water inlet pipe orifice, and overflows into a replaceable channel through a weir crest after entering a water tank, so that a circulating system is formed;
in the process, the flow of the water can be measured when the water flows in the channel relatively stably, and the flow can be calibrated by using a standard mass method after the water flows out of the water inlet pipe.
Drawings
FIG. 1 is a schematic diagram of a channel flow measurement system according to the present utility model;
FIG. 2 is a schematic diagram of a channel flow calibration system according to the present utility model;
in the figure: 1. weighing the container; 2. an electronic balance; 3. a tray; 4. a water outlet pipe; 5. a water gauge; 6. a machine vision speed measuring system; 7. replaceable channels; 8. a water tank; 9. a water inlet pipe; 10. a weir crest; 11. a water pump; 12. and a platform bracket.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 and 2, a calibration device for a machine vision channel flow measurement device is characterized by comprising:
the flow calibration device comprises an electronic balance 2, a tray 3 arranged on the electronic balance 2 and the electronic balance 2 arranged on the tray 3;
the flow calibration device is characterized in that when water flows out of a water outlet pipe 4, the weighing container 1 is utilized to obtain the mass of water within a period of time, an electronic balance 2 with a tray 3 is placed on the weighing container 1 for clearing and peeling before the weighing container 1 is used, no water drops overflow in the process of obtaining the mass of water by utilizing the weighing container 1, the operation is carried out under the video recording of a camera, the time when the weighing container 1 obtains the mass of water can be accurately obtained through time measurement software, and the electronic balance 2 can accurately obtain the weight of water, so that the flow of the flow calibration device can be obtained;
the channel water flow circulating device comprises a platform bracket 12, a water outlet pipe 4, a channel 7, a water tank 8, a water inlet pipe 9 and a water pump 11 which are arranged on the platform bracket 12;
the channel flow circulating device pumps water from the water outlet pipe 4 into the water inlet pipe 9 under the operation of the water pump 11, and water flow in the water inlet pipe 9 overflows from the weir crest 10 after flowing into the water tank 8, and overflowed water flow enters the replaceable channel;
the replaceable channels 7 in the channel flow circulating device are operated based on the platform support 12, the platform support 12 is designed according to channels with different sections which can be installed, and the channels with different sections such as rectangular, trapezoidal, U-shaped and the like can be replaced according to requirements, so that the flow measuring requirements of the water conservancy industry are met;
the machine vision flow measuring device comprises a water gauge 5 and a corresponding machine vision flow velocity measuring system 6;
the machine vision flow speed measuring system is used for measuring the water level at the moment by utilizing the machine vision or a water gauge 5 after water flow enters the replaceable channel 7, obtaining the surface flow velocity under the machine vision speed measuring system, obtaining the cross-sectional area of the rectangular channel at the moment under the condition that the water level is known, and obtaining the flow at the moment by utilizing a water level-flow velocity area method.
Measurement principle:
in the measuring process, the machine vision speed measuring system 6 obtains the flow velocity of the water flow surface by obtaining the characteristic information of a moving target on the water flow surface, utilizes a target detection algorithm to obtain the flow velocity of the water flow surface, utilizes the hydraulic characteristic of a channel to establish the relation between the flow velocity of the surface of the channel and the flow velocity of the section of the channel, so as to obtain the flow velocity of the section, obtains the water level information under the measurement of the water gauge 5, and finally obtains the flow of the section; the flow measurement of the corresponding flow calibration device is performed by using a standard mass method, namely, weighing the mass of the liquid flowing into the container by using an electronic balance in a certain time. In the measuring process, under the condition of constant output of the water pump, the average value and the standard deviation are calculated after repeated measurement. Therefore, the measuring device has the advantages of accurate time measurement, higher measurement result precision, small volume and convenience for quick on-site flow calibration; and the device can change the channel of different cross sections as required, satisfies the water conservancy trade and surveys the flow requirement.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A machine vision channel flow measurement device calibration apparatus, comprising:
the flow calibration device comprises an electronic balance (2), a tray (3) arranged on the electronic balance (2) and the electronic balance (2) arranged on the tray (3);
the channel water flow circulating device comprises a platform bracket (12), and a water outlet pipe (4), a channel (7), a water tank (8), a water inlet pipe (9) and a water pump (11) which are arranged on the platform bracket (12);
the machine vision flow measuring device comprises a water gauge (5) and a corresponding machine vision flow velocity measuring system (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223005975.2U CN219301749U (en) | 2022-11-11 | 2022-11-11 | Machine vision channel flow measurement equipment calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223005975.2U CN219301749U (en) | 2022-11-11 | 2022-11-11 | Machine vision channel flow measurement equipment calibration device |
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| Publication Number | Publication Date |
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| CN219301749U true CN219301749U (en) | 2023-07-04 |
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| CN202223005975.2U Expired - Fee Related CN219301749U (en) | 2022-11-11 | 2022-11-11 | Machine vision channel flow measurement equipment calibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117629315A (en) * | 2024-01-26 | 2024-03-01 | 四川省产业计量测试研究院 | Open channel flow auxiliary measuring device |
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2022
- 2022-11-11 CN CN202223005975.2U patent/CN219301749U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117629315A (en) * | 2024-01-26 | 2024-03-01 | 四川省产业计量测试研究院 | Open channel flow auxiliary measuring device |
| CN117629315B (en) * | 2024-01-26 | 2024-04-05 | 四川省产业计量测试研究院 | Open channel flow auxiliary measuring device |
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Granted publication date: 20230704 |