Flow measuring device, method and equipment for drainage pipeline and medium

Abstract

The embodiment of the invention provides a flow measuring device, method and equipment for a drainage pipeline and a medium, and relates to the technical field of drainage pipelines. The device comprises a first fixing unit, a flow detection unit and a lifting unit, the first fixing unit is fixedly arranged in an inspection well of the drainage pipeline, the flow detection unit and the second fixing unit are both fixedly connected with the first fixing unit, and the bottoms of the flow detection unit and the first fixing unit are located on the same plane; the flow detection unit is used for determining the water flow velocity and the water flow of water in the drainage pipeline. The method comprises the following steps: determining a water body flow velocity and an offset parameter detected by a flow detection unit and a rotation parameter corresponding to a lifting unit; and performing offset compensation processing on the water body flow velocity based on the offset parameter to determine the water body flow of the water body in the drainage pipeline. The precision and stability of flow measurement of the drainage pipeline are improved.

Description

Technical Field

[0001] The present application relates to the technical field of drainage pipes, and in particular to a flow measurement device, method, equipment and medium for drainage pipes. Background Art

[0002] With the acceleration of urbanization, the operation status of drainage pipes, as part of urban infrastructure, is closely related to the urban environment and the quality of life of citizens.

[0003] In recent years, due to climate change and urban development, drainage pipes have been facing many challenges while taking on urban drainage tasks. Among them, flow monitoring in drainage pipes has become the key to solving these challenges. Ultrasonic Doppler flowmeters are widely used in flow measurement scenarios in drainage pipes. They are easy to install and can achieve real-time measurement.

[0004] However, in the existing measurement methods, the ultrasonic Doppler flowmeter has low measurement accuracy due to the influence of various factors such as installation position, installation direction, pipeline sludge, impurities in the pipeline, bubbles, turbulence, etc. Summary of the invention

[0005] The embodiments of the present application provide a flow measurement device, method, equipment and medium for a drainage pipe, so as to improve the accuracy and stability of the flow measurement of the drainage pipe.

[0006] In a first aspect, an embodiment of the present application provides a flow measurement device for a drainage pipe, comprising:

[0007] In a possible embodiment, a first fixed unit, a flow detection unit and a lifting unit, the lifting unit includes: a second fixed unit, a first lifting rod, a second lifting rod, a first power unit and a second power unit; the first fixed unit is fixedly arranged in the inspection well of the drainage pipe, the flow detection unit and the second fixed unit are fixedly connected to the first fixed unit, and the bottom of the flow detection unit and the first fixed unit are in the same plane; the first power unit and the second power unit are respectively arranged on both sides of the second fixed unit and connected to the second fixed unit; the first power unit is movably connected to the first lifting rod, and is used to drive the first lifting rod to move up and down along the set direction; the second power unit is movably connected to the second lifting rod, and is used to drive the second lifting rod to move up and down along the set direction; the flow detection unit is used to determine the water flow rate and water flow of the water body in the drainage pipe.

[0008] In a possible implementation, the flow detection unit includes: a detection body, a flow direction sheet, and a rotary encoder;

[0009] The flow direction plate is arranged at the front end of the detection body through the rotary encoder, and the installation direction of the flow direction plate is the same as the installation direction of the detection body; the rotary encoder is used to determine the corresponding offset parameter based on the orientation of the flow direction plate; the detection body is used to send ultrasonic waves and determine the water flow rate of the water in the drainage pipe based on the ultrasonic waves.

[0010] In a possible implementation, the lifting unit further includes: a resistance unit;

[0011] The resistance unit is arranged at the bottom of the first lifting rod, and is used to increase the resistance when the first lifting rod enters the sediment layer in the drainage pipe.

[0012] In a second aspect, an embodiment of the present application provides a flow measurement method for a drainage pipe, comprising:

[0013] Determine the water flow velocity detected by the flow detection unit, the offset parameter, and the corresponding rotation parameter of the lifting unit, wherein the offset parameter is used to indicate the angle between the installation direction of the flow measurement device and the water flow direction;

[0014] Performing an offset compensation process on the water flow velocity based on the offset parameter to obtain a target flow velocity of the water in the drainage pipe;

[0015] Based on the rotation parameter and the target flow rate, a water flow rate of the water body in the drainage pipe is determined.

[0016] In a possible implementation, determining the water flow rate of the water body in the drainage pipe based on the rotation parameter and the target flow rate includes:

[0017] Based on the rotation parameters, determining displacement information and sediment layer height;

[0018] Determine the area of ​​the flow cross section of the pipeline based on the displacement information and the height of the sediment layer;

[0019] The result of multiplying the area of ​​the flow cross-section of the pipe by the target flow rate is used as the water flow rate of the water body in the drainage pipe.

[0020] In a possible implementation, the rotation parameter includes a first rotation parameter and a second rotation parameter, and determining the displacement information and the height of the deposition layer based on the rotation parameters includes:

[0021] The product of the first rotation parameter and the corresponding rotation radius is used as the first lifting rod displacement information, wherein the first lifting rod displacement information is used to indicate the distance between the plane where the bottom of the flow detection unit and the first fixing unit are located and the deposition layer and the surface of the deposition layer;

[0022] The product of the second rotation parameter and the corresponding rotation radius is used as the second lifting rod displacement information, and the second lifting rod displacement information is used as the distance between the plane where the bottom of the flow detection unit and the first fixing unit are located and the bottom of the drainage pipe;

[0023] The height of the deposition layer is determined according to the first lifting rod displacement information and the second lifting rod displacement information.

[0024] In a possible implementation manner, determining the water flow rate detected by the flow detection unit includes:

[0025] Determine a plurality of water body flow velocity measurement values, and sort the plurality of water body flow velocity measurement values;

[0026] According to the preset interval width, the water body flow velocity measurement values ​​after sorting are grouped to determine multiple ordered intervals;

[0027] For any one of the plurality of ordered intervals, if the number of water body flow velocity measurement values ​​in the interval meets a preset requirement, the interval is retained;

[0028] If the number of water flow velocity measurement values ​​within the interval does not meet the preset requirement, the interval is deleted;

[0029] Based on the plurality of water body flow velocity measurements within the retained ordered intervals, an average value is determined, and the average value is used as the water body flow velocity.

[0030] In a possible embodiment, before determining the water flow rate, offset parameter detected by the flow detection unit and the rotation parameter corresponding to the lifting unit, it also includes: determining a preset threshold, wherein when the power of the power unit does not reach the preset threshold, the rotation parameter corresponding to the power unit continues to change, and when the power of the power unit reaches the preset threshold, the rotation parameter corresponding to the power unit stops changing.

[0031] In a third aspect, an embodiment of the present application provides a flow measurement device for a drainage pipe, including: a memory, a processor;

[0032] Memory stores computer-executable instructions;

[0033] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above second aspect and various possible implementations of the second aspect.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above second aspect and various possible implementation methods of the second aspect.

[0035] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above second aspect and various possible implementation methods of the second aspect.

[0036] The flow measurement device, method, equipment and medium for drainage pipes provided in the embodiments of the present application improve the accuracy and stability of drainage pipe flow measurement by determining the installation direction of the detection body and the offset parameters and the height of the sedimentation layer before the water flow direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] Figure 1 A top view of a flow measurement device for a drainage pipe provided in an embodiment of the present application;

[0039] Figure 2 A front view of a flow measurement device for a drainage pipe provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of a partial structure of a lifting unit provided in an embodiment of the present application;

[0041] Figure 4 A flow chart of a method for measuring flow in a drainage pipe provided in an embodiment of the present application Figure 1 ;

[0042] Figure 5 This is a schematic diagram of the actual ultrasonic direction deviation;

[0043] Figure 6 A flow chart of a method for measuring flow in a drainage pipe provided in an embodiment of the present application Figure 2 ;

[0044] Figure 7 A schematic diagram of the cross-sectional area of ​​water flow in a pipeline provided in an embodiment of the present application;

[0045] Figure 8 A schematic diagram of the structure of a flow measurement device for a drainage pipe provided in this application.

[0046] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0047] Description of reference numerals:

[0048] 101-first fixed unit; 102-flow detection unit; 103-lifting unit; 1031-second fixed unit; 1032-first lifting rod; 1033-second lifting rod; 1034-first power unit; 1035-second power unit; 1036-resistance unit; 1021-detection body; 1022-flow plate; 1023-rotary encoder. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] "Multiple" means two or more, and other quantifiers are similar. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0051] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0052] As part of urban infrastructure, the operating status of drainage pipes is closely related to the urban environment and the quality of life of citizens.

[0053] The Doppler ultrasonic flowmeter transmits ultrasonic signals into the fluid through the transmitter. These signals will be reflected and scattered when encountering suspended particles or bubbles in the fluid. Due to the flow of the fluid, there is a difference between the frequency of the reflected ultrasonic signal and the frequency of the transmitted signal, which is called Doppler frequency shift. The size of the Doppler frequency shift is proportional to the flow velocity of the fluid. By measuring the Doppler frequency shift, the flow velocity of the fluid can be calculated. Finally, the flow rate is calculated by combining the flow velocity and the area of ​​the measurement section.

[0054] In recent years, due to climate change and urban development, drainage pipes have been facing many challenges while taking on urban drainage tasks. Among them, flow monitoring in drainage pipes has become the key to solving these challenges. Ultrasonic Doppler flowmeters are widely used in flow measurement scenarios in drainage pipes. They are easy to install and can achieve real-time measurement.

[0055] However, in the existing measurement method, the ultrasonic Doppler flowmeter is affected by many factors such as installation position, installation direction, pipeline sludge, impurities in the pipeline, bubbles, turbulence, etc., and its measurement accuracy is not high.

[0056] In response to the above problems, the present application provides a flow measurement device for a drainage pipe, which effectively reduces the error in flow meter measurement and improves the accuracy of flow measurement by determining the area of ​​the pipe flow section and performing offset compensation for the water flow velocity in the pipe.

[0057] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0058] Figure 1 A top view of a flow measurement device for a drainage pipe provided in an embodiment of the present application, such as Figure 1 As shown, the device includes: a first fixing unit 101, a flow detection unit 102 and a lifting unit 103, and the lifting unit 103 includes: a second fixing unit 1031, a first lifting rod 1032, a second lifting rod 1033, a first power unit 1034 and a second power unit 1035;

[0059] The first fixed unit 101 is fixedly arranged in the inspection well of the drainage pipe, the flow detection unit 102 and the second fixed unit 1031 are both fixedly connected to the first fixed unit 101, and the bottom of the flow detection unit 102 and the first fixed unit 101 are in the same plane; the first power unit 1034 and the second power unit 1035 are respectively arranged on both sides of the second fixed unit 1031 and connected to the second fixed unit 1031; the first power unit 1034 is movably connected to the first lifting rod 1032, and is used to drive the first lifting rod 1032 to move up and down along the set direction; the second power unit 1035 is movably connected to the second lifting rod 1033, and is used to drive the second lifting rod 1033 to move up and down along the set direction; the flow detection unit 102 is used to determine the water flow velocity and water flow of the water body in the drainage pipe.

[0060] Among them, the first fixed unit 101 can be, for example, an L-rod, used to carry other components, including the flow detection unit 102 and the second fixed unit 1031; the power unit includes a first power unit 1034 and a second power unit 1035, and the first power unit 1034 and the second power unit 1035 can be, for example, servos; the second fixed unit 1031 can be, for example, a mounting plate or a fixing plate.

[0061] The first fixed unit 101 is connected to the flow detection unit 102, and the bottom of the flow detection unit 102 is in the same plane as the bottom of the first fixed unit 101; the lifting unit 103 is connected to the first fixed unit 101 through the second fixed unit 1031, and the first fixed unit 101 is fixedly arranged along the inspection well and deployed in the drainage pipe to realize the flow measurement of the drainage pipe.

[0062] The power unit includes a first power unit 1034 and a second power unit 1035, and the lifting rod includes a first lifting rod 1032 and a second lifting rod 1033. The first power unit 1034 and the second power unit 1035 are respectively arranged on both sides of the second fixed unit 1031. In the initial position, the corresponding rotation angles of the first power unit 1034 and the second power unit 1035 can be, for example, 0. The first power unit 1034 is connected to the first lifting rod 1032 to drive the first lifting rod 1032 to move up and down along the setting direction; the second power unit 1035 is connected to the second lifting rod 1033 to drive the second lifting rod 1033 to move up and down along the setting direction. The bottoms of the first lifting rod and the second lifting rod can be, for example, in the same plane as the bottoms of the flow detection unit and the first fixed unit.

[0063] Each power unit corresponds to a preset threshold. When the output power of the power unit is less than the preset threshold, the power unit drives the corresponding lifting rod to move downward until the output power of the power unit reaches the preset threshold. At this time, the lifting rod is at the target position, and the power unit drives the corresponding lifting rod to move upward and return to the initial position. The corresponding rotation parameter is determined according to the difference in rotation angle between the power unit at the initial position and the power unit at the target position.

[0064] When measuring flow, the first power unit drives the first lifting rod to move downward in the set direction. When the output power of the first power unit reaches the first preset threshold value, it indicates that the first lifting rod contacts the sediment layer, and the first rotation parameter is determined. At this time, the first power unit drives the first lifting rod to move upward in the set direction and return to the initial position to prevent the first lifting rod from being subsequently buried by silt and other materials in the sediment layer; the second power unit drives the second lifting rod to move downward in the set direction. When the output power of the second power unit reaches the second preset threshold value, it indicates that the second lifting rod contacts the bottom of the pipeline, and the second rotation parameter is determined. At this time, the second power unit drives the second lifting rod to move upward in the set direction and return to the initial position to prevent the second lifting rod from being subsequently buried by silt and other materials in the sediment layer.

[0065] The flow detection unit 102 includes a central system, which determines the thickness of the sediment layer and the distance between the bottom of the flow detection unit and the bottom of the pipe according to the first rotation parameter and the second rotation parameter, and then determines the flow cross-sectional area of ​​the pipe. According to the flow and flow cross-sectional area detected by the flow monitoring unit, the water flow of the water body in the drainage pipe is obtained.

[0066] Figure 2 A front view of a flow measuring device for a drainage pipe provided in an embodiment of the present application.

[0067] In one possible implementation, Figure 2 As shown, the flow detection unit 102 includes: a detection body 1021, a flow direction sheet 1022 and a rotary encoder 1023;

[0068] The flow direction sheet 1022 is arranged at the front end of the detection body 1021 through the rotary encoder 1023, and the installation direction of the flow direction sheet 1022 is the same as the installation direction of the detection body 1021; the rotary encoder 1023 is used to determine the corresponding offset parameter based on the orientation of the flow direction sheet 1022; the detection body 1021 is used to send ultrasonic waves and determine the water flow rate of the water body in the drainage pipe based on the ultrasonic waves.

[0069] The detection body 1021 may be a flow meter, for example; the flow direction piece 1022 may be a small crescent shape, for example. It is understandable that if the installation direction of the detection body 1021 is inconsistent with the flow direction of the water in the pipeline, the flow of the water in the pipeline will cause the flow direction piece 1022 to deviate in angle.

[0070] The flow direction sheet is set at the front end of the detection body through a rotary encoder, and the installation direction of the flow direction sheet is the same as the installation direction of the detection body. At this time, the initial angle of the rotary encoder is 0. When the water flows, if the installation direction of the detection body is inconsistent with the flow direction of the water in the pipeline, the flow of water in the pipeline drives the flow direction sheet to shift in angle. The corresponding offset angle is the angle between the water flow direction and the installation direction of the detection body. The rotary encoder is used to measure the rotation angle of the flow direction sheet and determine the corresponding offset parameters.

[0071] The detection body 1021 transmits ultrasonic waves obliquely upward through a probe, and determines the flow rate of the water body based on the ultrasonic waves propagating in the water body in the pipe.

[0072] Figure 3 A schematic diagram of the partial structure of the lifting unit provided in an embodiment of the present application.

[0073] In one possible implementation, Figure 3 As shown, the lifting unit 103 further includes: a resistance unit 1036; the resistance unit 1036 is arranged at the bottom of the first lifting rod 1032, and is used to increase the resistance when the first lifting rod 1032 enters the sediment layer in the drainage pipe.

[0074] The resistance unit 1036 may be, for example, a large-diameter circular plate.

[0075] A circular plate with a larger diameter is added to the bottom of the first lifting rod 1032 to increase the resistance of the deposition layer to the lifting rod, making it difficult for the first lifting rod to enter the deposition layer.

[0076] A flow measuring device for a drainage pipe provided in an embodiment of the present application installs a flow detection unit through a first fixing unit, determines the area of ​​the flow cross-section of the pipe and the thickness of the sediment layer in the pipe in a simple manner through a lifting unit, and detects the water flow velocity and water flow rate of the water body in the pipe through the flow detection unit, thereby improving the stability and accuracy of the flow velocity measurement and effectively improving the stability and accuracy of the flow measurement of the drainage network.

[0077] Figure 4 A flow chart of a method for measuring flow in a drainage pipe provided in an embodiment of the present application Figure 1 .like Figure 4 As shown, in this embodiment Figure 1 to Figure 3 Based on the embodiment, a flow measurement method for a drainage pipe is explained, and the method includes:

[0078] S401, determining the water flow velocity and offset parameters detected by the flow detection unit and the corresponding rotation parameters of the lifting unit.

[0079] Among them, the water flow rate is determined based on the ultrasonic wave sent by the detection body, the offset parameter is the angular offset of the flow plate as the water flows, which is used to indicate the angular difference between the installation direction of the detection body and the flow direction of the water in the pipeline, and the rotation parameter is used to indicate the difference in rotation angle between the power unit in the initial position and the power unit in the target position.

[0080] The water flow rate of the water body in the pipeline is determined based on the ultrasonic wave emitted by the detection body, the angle difference between the installation direction of the detection body and the flow direction of the water body in the pipeline is determined by the rotary encoder, and the corresponding lifting rod is driven by the power unit to determine the corresponding rotation parameters.

[0081] In a possible implementation, determining the water flow velocity detected by the flow detection unit is described in detail, including: determining a plurality of water flow velocity measurement values, and sorting the plurality of water flow velocity measurement values; grouping the sorted water flow velocity measurement values ​​according to a preset interval width, and determining a plurality of ordered intervals;

[0082] The water flow velocity measurement value is the water flow velocity obtained based on the ultrasonic wave emitted by the detection subject; the preset interval width may be, for example, 0.01 m / s.

[0083] The detection subject transmits ultrasonic waves obliquely upward through the probe and propagates them in the water in the pipe. Since the water contains impurities such as bubbles or particles (it is assumed that the impurities and the water flow velocity are consistent), when the ultrasonic waves come into contact with the impurities in the water, the frequency of the ultrasonic waves when they return to the receiver changes relatively, resulting in a Doppler frequency shift. The following formula is used to determine the measured value of the water flow velocity:

[0084]

[0085] Among them, Δf is the frequency difference between the ultrasonic transmitting and receiving transducers, c is the propagation speed of ultrasonic waves in water, f0 is the fixed frequency of ultrasonic transmission, and α is the angle between the ultrasonic wave and the flow direction of the water body.

[0086] Ultrasonic waves are emitted repeatedly to obtain multiple water flow velocity measurement values ​​within a short period of time, the multiple water flow velocity measurement values ​​are sorted, and the sorted multiple water flow velocity measurement values ​​are divided according to a preset interval width to determine multiple ordered intervals until all water flow velocity measurement values ​​are within the multiple ordered intervals.

[0087] For any one of the multiple ordered intervals, if the number of water flow velocity measurement values ​​within the interval meets the preset requirements, the interval is retained; if the number of water flow velocity measurement values ​​within the interval does not meet the preset requirements, the interval is deleted; based on the multiple water flow velocity measurement values ​​within the retained ordered interval, an average value is determined, and the average value is used as the water flow velocity.

[0088] The preset requirement may be, for example, that the number of water flow velocity measurement values ​​within the reserved interval is greater than or equal to 1 / 5 of the total number of water flow velocity measurement values.

[0089] For each ordered interval, if the number of water velocity measurement values ​​in the ordered interval meets the preset requirements, the ordered interval is retained; if the number of water velocity measurement values ​​in the ordered interval does not meet the preset requirements, the ordered interval is deleted, and the average value is determined based on the multiple water velocity measurement values ​​in each retained ordered interval, and the average value is used as the water velocity of the internal water body in the pipeline. Through the above-mentioned velocity multi-data processing method, the influence of noise and interference introduced by factors such as impurities, bubbles, and turbulence in the pipeline on the water velocity measurement is reduced. Compared with the average value based on multiple water velocity measurement values ​​in a short period of time, the above-mentioned velocity multi-data processing method reduces the influence of erroneous data and invalid data, improves the accuracy of water measurement, provides a basis for further calculation of water flow, and improves the accuracy of water flow measurement.

[0090] In a possible implementation, before determining the water flow velocity and the offset parameter detected by the flow detection unit and the rotation parameter corresponding to the lifting unit, a preset threshold may be determined first.

[0091] When the power of the power unit does not reach a preset threshold, the rotation parameter corresponding to the power unit continues to change, and when the power of the power unit reaches a preset threshold, the rotation parameter corresponding to the power unit stops changing.

[0092] The preset threshold is determined through laboratory calibration tests. For example, by placing a certain thickness of common sediment in drainage pipes at the bottom of the test box, and then injecting a certain amount of water into the test box. The power supply of the power unit is connected with a very small voltage, and the lifting rod is transported vertically downward. When the lifting rod reaches the sediment layer, the lifting rod stops transporting due to increased resistance. At this time, the power supply voltage of the power unit is continuously increased until the rod enters the sediment layer and continues to transport. The input power supply voltage V1 and V2 of the power unit when the lifting rod stops transporting and continues to transport are recorded respectively. Based on this, the preset thresholds of the first power unit and the second power unit during normal operation can be set, which can be preferably:

[0093]

[0094] Among them, v1 is the first preset threshold corresponding to the first power unit, and v2 is the second preset threshold corresponding to the second power unit.

[0095] S402: Perform offset compensation processing on the water flow rate based on the offset parameter to obtain a target flow rate of the water body in the drainage pipe.

[0096] The offset parameter is used to indicate the angle difference between the installation direction of the detection body and the flow direction of the water in the pipeline.

[0097] The calculation of water flow velocity based on Doppler frequency shift is based on the condition that the installation direction of the flow meter is parallel to the pipeline direction (i.e., the direction of the water flow velocity). However, this condition is often difficult to guarantee during the actual installation process. That is, there is often an angle between the flow meter direction and the water flow velocity direction, which will affect the calculation accuracy of the water flow velocity. Therefore, it is necessary to measure and compensate for this angle.

[0098] Figure 5 This is a schematic diagram of the actual ultrasonic direction deviation. Figure 5 As shown, the angle between the water flow direction and the ideal sound wave direction is α, the angle between the ideal sound wave direction and the actual sound wave direction is β, and the angle between the water flow direction and the actual sound wave direction is If the installation direction of the detection body is consistent with the water flow direction, the direction in which the detection body emits ultrasonic waves is the ideal sound wave direction; if the installation direction of the detection body is inconsistent with the water flow direction, the direction in which the detection body emits ultrasonic waves is the actual sound wave direction, and the angle between the actual sound wave direction and the water flow direction is

[0099] Use the following formula to compensate for the water flow rate and determine the target flow rate:

[0100] v true =v mean ·cosβ

[0101] Among them, v true is the target flow rate, v mean is the water velocity and β is the offset parameter.

[0102] S403: Determine the water flow rate of the water body in the drainage pipe based on the rotation parameter and the target flow rate.

[0103] The flow cross-sectional area of ​​the pipe is determined based on the rotation parameters.

[0104] The water flow rate is determined using the following formula:

[0105] Q=S·v true

[0106] Among them, Q is the water flow rate and S is the flow cross-sectional area.

[0107] The embodiment of the present application provides a flow measurement method for a drainage pipe, which determines the water flow velocity and offset parameters detected by a flow detection unit, compensates for the water flow velocity, determines the target flow velocity, and determines the water flow rate of the water body in the drainage network based on the rotation parameters and the target flow velocity corresponding to the lifting unit, thereby improving the accuracy and stability of the flow velocity measurement and effectively improving the stability and precision of the flow measurement in the drainage network.

[0108] Figure 6 A flow chart of a method for measuring flow in a drainage pipe provided in an embodiment of the present application Figure 2 ,like Figure 6 As shown, in this embodiment Figure 4 Based on the embodiment, a possible implementation of a flow measurement method for a drainage pipe is described in detail, and the method includes:

[0109] S601, determining the water flow velocity and offset parameters detected by the flow detection unit and the corresponding rotation parameters of the lifting unit.

[0110] Step S601 is similar to step S401 and will not be described again here.

[0111] S602: Perform offset compensation processing on the water flow rate based on the offset parameter to obtain a target flow rate of the water body in the drainage pipe.

[0112] Step S602 is similar to step S402 and will not be described again.

[0113] S603: The rotation parameter includes a first rotation parameter and a second rotation parameter, and the product of the first rotation parameter and the corresponding rotation radius is used as the first lifting rod displacement information.

[0114] Among them, the first rotation parameter is used to indicate the difference in rotation angles between the initial position and the target position of the first lifting rod; the rotation radius corresponding to the first rotation parameter is the rotation radius value at the connection between the first power unit and the first lifting rod, and the displacement information of the first lifting rod is used to indicate the distance between the plane where the flow detection unit, the first fixing unit, the first lifting rod and the bottom of the second lifting rod are located and the surface of the deposition layer.

[0115] The displacement information of the first lifting rod is determined by the following formula:

[0116] h1=θ1·r1

[0117] Wherein, h1 is the displacement information of the first lifting rod, θ1 is the first rotation parameter, and r1 is the rotation radius corresponding to the first rotation parameter.

[0118] S604: taking the product of the second rotation parameter and the corresponding rotation radius as second lifting rod displacement information.

[0119] Among them, the second rotation parameter is used to indicate the difference in rotation angles between the second lifting rod in the initial position and the target position; the rotation radius corresponding to the second rotation parameter is the rotation radius value of the connection between the second power unit and the second lifting rod, and the second lifting rod displacement information is used to indicate the distance between the flow detection unit, the second fixing unit, the second lifting rod and the plane where the bottom of the second lifting rod is located and the bottom of the pipeline.

[0120] The displacement information of the first lifting rod is determined by the following formula:

[0121] h=θ2·r2

[0122] Wherein, h is the displacement information of the second lifting rod, θ2 is the first rotation parameter, and r2 is the rotation radius corresponding to the first rotation parameter.

[0123] S605: Determine the height of the deposition layer according to the first lifting rod displacement information and the second lifting rod displacement information.

[0124] According to the displacement information of the first lifting rod and the displacement information of the second lifting rod, the height of the sedimentary layer is determined by the following formula:

[0125] h2=h-h1

[0126] S606: Determine the area of ​​the flow cross section of the pipeline based on the displacement information and the height of the sediment layer.

[0127] The displacement information includes the first lifting rod displacement information and the second lifting rod displacement information.

[0128] Figure 7 A schematic diagram of the cross-sectional area of ​​water flow in a pipeline provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the liquid level height in the pipeline is H, the displacement information of the first lifting rod is h1, the displacement information of the second lifting rod is h, the height of the sedimentation layer is h2, and the radius of the pipeline is R.

[0129] The following formula is used to determine the area of ​​the pipe flow cross section:

[0130]

[0131] Among them, S is the area of ​​the flow section of the pipeline, H is the liquid level height in the pipeline, h is the displacement information of the second lifting rod, h2 is the height of the sedimentation layer, and R is the radius of the pipeline.

[0132] S607: The result of multiplying the area of ​​the flow cross-section of the pipe by the target flow rate is used as the water flow rate of the water body in the drainage pipe.

[0133] The flow rate of a water body is determined using the following formula:

[0134] Q=S·vtrue

[0135] Among them, Q is the water flow, S is the flow cross-sectional area, v true is the target flow rate.

[0136] An embodiment of the present application provides a flow measurement method for a drainage pipe. By determining the displacement information corresponding to the lifting rod to determine the height of the sediment layer, the calculation accuracy of the area of ​​the flow section of the pipeline water body is improved. By compensating for the water body flow velocity, the accuracy and stability of the flow velocity measurement are improved, and the stability and precision of the flow measurement of the drainage network are effectively improved.

[0137] Figure 8 This is a schematic diagram of the structure of a flow measurement device for a drainage pipe provided in this application. Figure 8 As shown, the flow measurement device 80 for a drainage pipe provided in this embodiment includes: at least one processor 801 and a memory 802. Optionally, the device 80 also includes a communication component 803. The processor 801, the memory 802 and the communication component 803 are connected via a bus 804.

[0138] In a specific implementation process, at least one processor 801 executes the computer-executable instructions stored in the memory 802, so that at least one processor 801 executes the above method.

[0139] The specific implementation process of the processor 801 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0140] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0141] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0142] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0143] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0144] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0145] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0146] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0147] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0148] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0149] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0150] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0151] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0152] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A flow measurement device for a drainage pipe, characterized in that: The flow measurement device comprises: a first fixing unit, a flow detection unit and a lifting unit, and the lifting unit comprises: a second fixing unit, a first lifting rod, a second lifting rod, a first power unit and a second power unit; The first fixing unit is fixedly arranged in the inspection well of the drainage pipe, the flow detection unit and the second fixing unit are both fixedly connected to the first fixing unit, and the bottoms of the flow detection unit and the first fixing unit are in the same plane; The first power unit and the second power unit are respectively arranged on both sides of the second fixing unit and connected to the second fixing unit; The first power unit is movably connected to the first lifting rod, and is used to drive the first lifting rod to move up and down along a set direction; The second power unit is movably connected to the second lifting rod, and is used to drive the second lifting rod to move up and down along a set direction; The flow detection unit is used to determine the water flow velocity and water flow rate of the water body in the drainage pipe.

2. The device according to claim 1, characterized in that The flow detection unit comprises: a detection body, a flow direction sheet and a rotary encoder; The flow direction sheet is arranged at the front end of the detection body through the rotary encoder, and the installation direction of the flow direction sheet is the same as the installation direction of the detection body; The rotary encoder is used to determine the corresponding offset parameter based on the orientation of the flow direction sheet; The detection body is used to send ultrasonic waves and determine the water flow rate of the water body in the drainage pipe based on the ultrasonic waves.

3. The device according to claim 1, characterized in that The lifting unit further comprises: a resistance unit; The resistance unit is arranged at the bottom of the first lifting rod, and is used to increase the resistance when the first lifting rod enters the sediment layer in the drainage pipe.

4. A flow measurement method for a drainage pipe, characterized in that: Applied to the flow measurement device according to any one of claims 1 to 3, the method comprises: Determine the water flow velocity detected by the flow detection unit, the offset parameter, and the corresponding rotation parameter of the lifting unit, wherein the offset parameter is used to indicate the angle between the installation direction of the flow measurement device and the water flow direction; Performing an offset compensation process on the water flow velocity based on the offset parameter to obtain a target flow velocity of the water in the drainage pipe; Based on the rotation parameter and the target flow rate, a water flow rate of the water body in the drainage pipe is determined.

5. The method according to claim 4, characterized in that The step of determining the water flow rate of the water body in the drainage pipe based on the rotation parameter and the target flow rate includes: Based on the rotation parameters, determining displacement information and sediment layer height; Determine the area of ​​the flow cross section of the pipeline based on the displacement information and the height of the sediment layer; The result of multiplying the area of ​​the flow cross-section of the pipe by the target flow rate is used as the water flow rate of the water body in the drainage pipe.

6. The method according to claim 5, characterized in that The rotation parameters include a first rotation parameter and a second rotation parameter, and the determining of the displacement information and the height of the deposition layer based on the rotation parameters includes: The product of the first rotation parameter and the corresponding rotation radius is used as the first lifting rod displacement information, where the first lifting rod displacement information is used to indicate the distance between the plane where the bottom of the flow detection unit and the first fixing unit are located and the deposition layer and the surface of the deposition layer; The product of the second rotation parameter and the corresponding rotation radius is used as the second lifting rod displacement information, and the second lifting rod displacement information is used as the distance between the plane where the bottom of the flow detection unit and the first fixing unit are located and the bottom of the drainage pipe; The height of the deposition layer is determined according to the first lifting rod displacement information and the second lifting rod displacement information.

7. The method according to claim 4, characterized in that The determining the water flow rate detected by the flow detection unit comprises: Determine a plurality of water body flow velocity measurement values, and sort the plurality of water body flow velocity measurement values; According to the preset interval width, the water body flow velocity measurement values ​​after sorting are grouped to determine multiple ordered intervals; For any one of the plurality of ordered intervals, if the number of water body flow velocity measurement values ​​in the interval meets a preset requirement, the interval is retained; If the number of water flow velocity measurement values ​​within the interval does not meet the preset requirement, the interval is deleted; Based on the plurality of water body flow velocity measurements within the retained ordered intervals, an average value is determined, and the average value is used as the water body flow velocity.

8. The method according to claim 4, characterized in that Before determining the water flow rate, offset parameter detected by the flow detection unit and the rotation parameter corresponding to the lifting unit, it also includes: determining a preset threshold, wherein when the power of the power unit does not reach the preset threshold, the rotation parameter corresponding to the power unit continues to change, and when the power of the power unit reaches the preset threshold, the rotation parameter corresponding to the power unit stops changing.

9. A flow measurement device for a drainage pipe, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the flow measurement method for a drainage pipe as described in any one of claims 4 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the flow measurement method for a drainage pipe as described in any one of claims 4 to 8.

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