Open channel online flow calibration system based on ultrasonic electromagnetic technology

Abstract

The utility model relates to an open channel on-line flow calibration system based on an ultrasonic electromagnetic technology, a flow measurement module comprises an ultrasonic liquid level sensor and a flow sensor, the ultrasonic liquid level sensor is arranged on a contraction section of a Parshall groove, and the flow sensor is arranged on a connecting pipeline; the control module is in communication connection with the flow measurement module and used for calculating the measurement difference value between the flow data measured by the ultrasonic liquid level sensor and the flow data measured by the flow sensor, and if the measurement difference value exceeds a preset flow threshold value, online calibration is conducted, and an alarm is given out. According to the technical scheme, the flow sensor is arranged to be matched with the ultrasonic liquid level sensor, when the measurement difference value between the flow sensor and the ultrasonic liquid level sensor exceeds the preset flow threshold value, online calibration is carried out, an alarm is triggered, and therefore real-time calibration can be carried out, and the requirement for online continuous measurement is met. And when the measured difference value exceeds the preset flow threshold value, an alarm is given.

Description

Technical Field

[0001] This utility model relates to the field of open channel early warning technology, and in particular to an online flow calibration system for open channels based on ultrasonic electromagnetic technology. Background Technology

[0002] A Parshall flume is a device used for measuring flow in open channels. Its working principle is based on the energy conservation principle and the characteristics of critical flow in a steady, gradually varying flow within an open channel. However, in practical applications, traditional calibration methods are mostly offline, which cannot meet the needs of online continuous measurement, and are prone to false alarms and missed alarms in terms of error alarms. Utility Model Content

[0003] In view of the above problems, this application provides an online flow calibration system for open channels based on ultrasonic electromagnetic technology, which solves the technical problems that traditional calibration methods are mostly offline calibration, which cannot meet the needs of online continuous measurement, and are prone to false alarms and missed alarms in terms of error alarm.

[0004] To achieve the above objectives, the inventors provide an online flow calibration system for open channels based on ultrasonic electromagnetic technology, comprising:

[0005] An open channel, which includes a Parshall flume and connecting pipes, with the outlet of the Parshall flume connected to the inlet of the connecting pipes;

[0006] The flow measurement module includes an ultrasonic level sensor and a flow sensor. The ultrasonic level sensor is installed in the contraction section of the Parshall tank, and the flow sensor is installed on the connecting pipe. The ultrasonic level sensor is used to measure the real-time flow in the contraction section of the Parshall tank, and the flow sensor is used to measure the real-time flow in the connecting pipe.

[0007] The control module is connected to the flow measurement module. The control module is used to calculate the measurement difference between the flow data measured by the ultrasonic level sensor and the flow data measured by the flow sensor. If the measurement difference exceeds the preset flow threshold, online calibration is performed and an alarm is issued.

[0008] As one embodiment of this utility model, the open channel online flow calibration system based on ultrasonic electromagnetic technology also includes an image acquisition module. The image acquisition module includes a camera, which is installed in the contraction section of the Parshall flume. The acquisition end of the camera is aligned with the contraction section of the Parshall flume, and the camera is used to acquire images of the contraction section of the Parshall flume in real time.

[0009] The control module is connected to the image acquisition module. The control module is also used to determine the volume of the interfering object based on the image data acquired by the camera. If the volume of the interfering object exceeds the preset volume threshold, an alarm will be issued.

[0010] As one embodiment of this utility model, the image acquisition module includes two cameras, which are respectively installed on both sides of the contraction section of the Parshall flume.

[0011] As one embodiment of this utility model, the preset volume threshold is 1 / 10 of the width of the ultrasonic beam emitted by the ultrasonic level sensor or 10% of the area of ​​the contraction section of the Parshall flume.

[0012] In one embodiment of this utility model, the ultrasonic level sensor is installed at one-third of the contraction section of the Parshall tank, and the camera is located at the front end of the ultrasonic level sensor.

[0013] As one embodiment of this utility model, the preset flow rate threshold is ±2%.

[0014] In one embodiment of this utility model, the diameter of the connecting pipe is D, and the distance between the ultrasonic level sensor and the flow sensor is 10D.

[0015] In one embodiment of this utility model, the control module includes a control panel and a display screen, with the display screen installed on the control panel.

[0016] As one embodiment of this utility model, the open channel online flow calibration system based on ultrasonic electromagnetic technology also includes a host computer, which is communicatively connected to the control module.

[0017] Unlike existing technologies, the technical solution of this application uses a flow sensor and an ultrasonic level sensor in conjunction. When the measurement difference between the two exceeds a preset flow threshold, online calibration is performed and an alarm is triggered. This allows for real-time calibration, meeting the needs of continuous online measurement. Furthermore, since the alarm is only triggered when the measurement difference exceeds the preset flow threshold, false alarms and missed alarms are less likely to occur.

[0018] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0019] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0020] In the accompanying drawings of the instruction manual:

[0021] Figure 1This is a schematic diagram of the structure of an open channel online flow calibration system based on ultrasonic electromagnetic technology, according to one embodiment of this application. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of an open channel online flow calibration system based on ultrasonic electromagnetic technology, according to one embodiment of this application. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of an open channel online flow calibration system based on ultrasonic electromagnetic technology, according to one embodiment of this application. Figure 3 ;

[0024] Figure 4 This is a schematic diagram of the structure of a control module according to an embodiment of this application;

[0025] Figure 5 This is a system block diagram of an open channel online flow calibration system based on ultrasonic electromagnetic technology according to an embodiment of this application;

[0026] Figure 6 This is a flowchart of an online flow calibration system for open channels based on ultrasonic electromagnetic technology, according to one embodiment of this application.

[0027] The reference numerals used in the above figures are explained as follows:

[0028] 100-Open channel online flow calibration system based on ultrasonic electromagnetic technology; 1-Open channel; 11-Parshall flume; 12-Connecting pipe; 2-Flow measurement module; 21-Ultrasonic level sensor; 22-Flow sensor; 3-Image acquisition module; 31-Camera; 4-Control module; 41-Control panel; 42-Display screen; 43-Button; D-Diameter of connecting pipe. Detailed Implementation

[0029] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0030] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0031] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0032] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0033] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0034] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0035] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0036] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] According to some embodiments of this application, please refer to Figures 1 to 6 This embodiment relates to an online flow calibration system 100 for open channels based on ultrasonic electromagnetic technology, including an open channel 1, a flow measurement module 2, and a control module 4. The open channel 1 includes a Parshall flume 11 and a connecting pipe 12, with the outlet of the Parshall flume 11 connected to the inlet of the connecting pipe 12. The flow measurement module 2 includes an ultrasonic level sensor 21 and a flow sensor 22. The ultrasonic level sensor 21 is installed in the contraction section of the Parshall flume 11, and the flow sensor 22 is installed on the connecting pipe 12. The ultrasonic level sensor 21 is used to measure the real-time flow of the contraction section of the Parshall flume 11, and the flow sensor 22 is used to measure the real-time flow of the connecting pipe 12. The control module 4 is communicatively connected to the flow measurement module 2. The control module 4 is used to calculate the measurement difference between the flow data measured by the ultrasonic level sensor 21 and the flow data measured by the flow sensor 22. If the measurement difference exceeds a preset flow threshold, online calibration is performed and an alarm is issued.

[0039] The Parshall flume 11 includes a contraction section, a throat section, and a diffuser section. The water flows sequentially from the contraction section to the throat section, then to the diffuser section, and finally flows from the diffuser section into the connecting pipe 12.

[0040] The flow sensor 22 is an electromagnetic flow sensor, used to measure the instantaneous and volumetric flow rates of conductive liquids and slurries. Meanwhile, the ultrasonic level sensor 21 measures the real-time flow rate in the contraction section of the Parshall flume 11, while the electromagnetic flow sensor 22 measures the real-time flow rate in the connecting pipe 12, ensuring that the flow measurement module 2 can accurately acquire flow information within the open channel 1.

[0041] Control module 4 can be installed externally, such as in some embodiments. Figure 1 As shown, the control module 4 is installed on the side of the open channel 1. Preferably, the control module 4 is installed on the side of the diffuser section of the Parshall flume 11.

[0042] The technical solution of this application incorporates a flow sensor and an ultrasonic level sensor. When the measurement difference between the two exceeds a preset flow threshold, online calibration is performed and an alarm is triggered. This allows for real-time calibration, meeting the requirements for continuous online measurement. Furthermore, since the alarm is only triggered when the measurement difference exceeds the preset flow threshold, false alarms and missed alarms are less likely to occur.

[0043] According to some embodiments of this application, optionally, such as Figures 1 to 3 As shown, the open channel online flow calibration system 100 based on ultrasonic electromagnetic technology also includes an image acquisition module 3. The image acquisition module 3 includes a camera 31, which is installed in the contraction section of the Parshall flume 11. The acquisition end of the camera 31 is aligned with the contraction section of the Parshall flume 11. The camera 31 is used to acquire images of the contraction section of the Parshall flume 11 in real time. The control module 4 is communicatively connected to the image acquisition module 3. The control module 4 is also used to determine the volume of the interfering object based on the image data acquired by the camera 31. If the volume of the interfering object exceeds a preset volume threshold, an alarm is issued.

[0044] Camera 31 is a high-definition camera and can rotate 360°. Camera 31 can acquire visual information inside the water tank in real time, providing raw data for subsequent identification. The acquisition end of camera 31 needs to be aligned with the contraction section of Parshall tank 11. In particular, the position and angle of camera 31 need to ensure that it can cover the contraction section area inside Parshall tank 11 that may disturb the accurate measurement of ultrasonic level sensor 21.

[0045] The control module 4 can be connected to the ultrasonic level sensor 21, the flow sensor 22, and the camera 31 via wires.

[0046] By setting up an image acquisition module 3 specifically for acquiring images of the contraction section of the Parshall flume 11, interference within the contraction section of the Parshall flume 11 can be effectively monitored, preventing interference from the ultrasonic level sensor 21 and ensuring the measurement accuracy and stability of the ultrasonic level sensor 21, thereby ensuring the accuracy and reliability of flow measurement in the open channel 1.

[0047] According to some embodiments of this application, optionally, such as Figure 2 As shown, the image acquisition module 3 includes two cameras 31, which are respectively installed on both sides of the contraction section of the Parshall flume 11.

[0048] By using two cameras 31 in tandem, images of the contraction section of the Parshall flume 11 can be captured more comprehensively. Furthermore, if one camera 31 malfunctions, the other camera 31 can still capture images normally.

[0049] According to some embodiments of this application, optionally, the preset volume threshold is 1 / 10 of the width of the ultrasonic beam emitted by the ultrasonic level sensor or 10% of the area of ​​the contraction section of the Parshall flume 11.

[0050] When the diameter (or maximum linear dimension) of a single object exceeds 1 / 10 of the width of the ultrasonic beam emitted by the ultrasonic level gauge, the larger floating object will block or scatter the ultrasonic signal, changing the direction and intensity of the reflected wave. When the area occupied by the floating object exceeds 10% of the area of ​​the contraction section of the Parshall flume 11, the probability of the ultrasonic signal being interfered with during reflection will greatly increase, leading to increased level measurement error. Therefore, it is preferable to set a preset volume threshold of 1 / 10 of the width of the ultrasonic beam emitted by the ultrasonic level sensor or 10% of the area of ​​the contraction section of the Parshall flume 11.

[0051] According to some embodiments of this application, optionally, such as Figures 1 to 3 As shown, the ultrasonic level sensor 21 is installed at one-third of the contraction section of the Parshall tank 11, and the camera 31 is located at the front end of the ultrasonic level sensor 21.

[0052] By mounting the camera 31 at the front end of the ultrasonic level sensor 21, the acquisition end of the camera 31 can cover the contraction section area within the Parshall tank 11 that may disturb the accurate measurement of the ultrasonic level sensor 21.

[0053] According to some embodiments of this application, optionally, the preset flow threshold is ±2%. Preferably, the preset flow threshold is set to ±2%. In other embodiments, the preset flow threshold can be set according to the size of the open channel 1 and the installation position of the flow measurement module 2.

[0054] According to some embodiments of this application, optionally, such as Figure 3 As shown, the diameter of the connecting pipe is D, and the distance between the ultrasonic level sensor 21 and the flow sensor 22 is 10D.

[0055] By setting the distance between the ultrasonic level sensor 21 and the flow sensor 22 to 10D, the impact of upstream flow field disturbance on the downstream electromagnetic flow sensor 22 is reduced.

[0056] According to some embodiments of this application, optionally, such as Figure 4 As shown, the control module 4 includes a control panel 41 and a display screen 42, with the display screen 42 installed on the control panel 41.

[0057] The display screen 42 can display the measurement data from the flow measurement module 2 and the image data acquired by the image acquisition module 3 in real time. The control module 4 also includes a data processing center, which can process the data measured by the flow measurement module 2 and the image data acquired by the image acquisition module 3. In some embodiments, the control module 4 also includes a button 43, which can be used to adjust a preset flow threshold, a preset volume threshold, or switch between different interfaces. In other embodiments, the control module 4 also includes an alarm, which is used to issue an alarm.

[0058] According to some embodiments of this application, optionally, the open channel online flow calibration system 100 based on ultrasonic electromagnetic technology also includes a host computer, which is communicatively connected to the control module 4.

[0059] The host computer can be a computer or a remote monitoring center. Alarms issued by control module 4 can be sent to staff via the host computer, allowing staff to take appropriate measures. Optionally, the alarm issued when the measurement difference exceeds a preset flow threshold can be different from the alarm issued when the volume of the interfering object exceeds a preset volume threshold; this could be due to different lighting or different broadcast content.

[0060] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An online flow calibration system for open channels based on ultrasonic electromagnetic technology, characterized in that, include: An open channel, comprising a Parshall flume and connecting pipes, wherein the outlet of the Parshall flume is connected to the inlet of the connecting pipes; The flow measurement module includes an ultrasonic level sensor and a flow sensor. The ultrasonic level sensor is installed in the contraction section of the Parshall tank, and the flow sensor is installed on the connecting pipe. The ultrasonic level sensor is used to measure the real-time flow of the contraction section of the Parshall tank, and the flow sensor is used to measure the real-time flow of the connecting pipe. The control module is communicatively connected to the flow measurement module. The control module is used to calculate the measurement difference between the flow data measured by the ultrasonic level sensor and the flow data measured by the flow sensor. If the measurement difference exceeds a preset flow threshold, online calibration is performed and an alarm is issued.

2. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 1, characterized in that, The open channel online flow calibration system based on ultrasonic electromagnetic technology also includes an image acquisition module, which includes a camera. The camera is installed in the contraction section of the Parshall flume, and the acquisition end of the camera is aligned with the contraction section of the Parshall flume. The camera is used to acquire images of the contraction section of the Parshall flume in real time. The control module is communicatively connected to the image acquisition module. The control module is also used to determine the volume of the interfering object based on the image data acquired by the camera. If the volume of the interfering object exceeds a preset volume threshold, an alarm is issued.

3. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 2, characterized in that, The image acquisition module includes two cameras, which are respectively installed on both sides of the contraction section of the Parshall flume.

4. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 2 or 3, characterized in that, The preset volume threshold is 1 / 10 of the width of the ultrasonic beam emitted by the ultrasonic level sensor or 10% of the area of ​​the contraction section of the Parshall flume.

5. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 2 or 3, characterized in that, The ultrasonic level sensor is installed at one-third of the contraction section of the Parshall tank, and the camera is located at the front end of the ultrasonic level sensor.

6. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 1, characterized in that, The preset flow rate threshold is ±2%.

7. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 1, characterized in that, The diameter of the connecting pipe is D, and the distance between the ultrasonic level sensor and the flow sensor is 10D.

8. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 1, characterized in that, The control module includes a control panel and a display screen, with the display screen installed on the control panel.

9. The open channel online flow calibration system based on ultrasonic electromagnetic technology according to claim 1, characterized in that, The open channel online flow calibration system based on ultrasonic electromagnetic technology also includes a host computer, which is communicatively connected to the control module.

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