Pipeline flow measurement method and system, storage medium

Abstract

The application discloses a pipeline flow measurement method and system and a storage medium. The pipeline flow measurement method comprises the following steps: obtaining the water level height of the liquid surface in a sewer pipeline; judging whether the water level height is greater than a preset value; when the water level height is less than the preset value, using a non-contact measurement method to measure the actual water level height and the water flow velocity, and when the water level height is greater than the preset value, using a contact measurement method; and calculating the pipeline flow of the sewer pipeline according to the actual water level height and the water flow velocity. In the foregoing manner, the water level height of the liquid surface in the sewer pipeline is first obtained, and a non-contact measurement method is used, so that the influence of the water quality, silt and garbage in the sewer pipeline can be effectively avoided, the water level height of the liquid surface is judged, and different measurement methods are adopted for the full-pipeline state when the water level height is greater than the preset value and the non-full-pipeline state when the water level height is less than the preset value, so that the accuracy of the measurement of the water level height of the liquid surface in the sewer pipeline and the water flow velocity is improved.

Description

Technical Field

[0001] This invention relates to the field of sewer pipe measurement technology, and in particular to a pipe flow measurement method, system, and storage medium. Background Technology

[0002] In existing technologies, there are numerous methods for measuring liquid level, flow velocity, and flow rate in sewer pipes, but the results are not always accurate. This is because existing methods rely on direct contact with the fluid, which is susceptible to the influence of factors such as water quality, debris, and silt within the pipe, leading to inaccurate results. Furthermore, these methods require regular manual offline maintenance, resulting in high maintenance costs and consequently, high real-time monitoring costs. On the other hand, sewer pipes can be full or not full, and existing technologies accurately measure the water level and flow velocity in both cases.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a method and system for measuring pipeline flow rate, as well as a storage medium, in order to solve the technical problem of inaccurate measurement of liquid level, flow velocity, and flow rate in sewer pipes in the prior art.

[0005] To achieve the above objectives, the present invention provides a pipeline flow measurement method, which includes the following steps:

[0006] To obtain the water level in the sewer pipe;

[0007] Determine whether the water level is less than a preset value;

[0008] When the water level is less than the preset value, a non-contact measurement method is used to obtain the actual water level and flow velocity in the sewer pipe.

[0009] When the water level is not less than the preset value, the actual water level and flow velocity in the sewer pipe are obtained by a contact measurement method.

[0010] The flow rate of the sewer pipe is calculated based on the actual water level and the water flow velocity.

[0011] Optionally, the non-contact measurement method includes:

[0012] The first electromagnetic wave is emitted to the liquid surface in the sewer pipe by a radar water level measuring sensor.

[0013] Receive the second electromagnetic wave returning from the liquid surface;

[0014] The distance between the radar water level sensor and the liquid surface is calculated based on the time interval between the first electromagnetic wave and the second electromagnetic wave.

[0015] The actual water level is calculated based on the distance between the radar water level sensor and the liquid surface.

[0016] Optionally, the non-contact measurement method further includes:

[0017] A third electromagnetic wave is emitted from the liquid surface in the lower water pipe by a radar flow velocity sensor.

[0018] The transmission frequency of the third electromagnetic wave and the intermediate frequency signal frequency of the radar antenna of the radar flow velocity measuring sensor are obtained.

[0019] The angle between the third electromagnetic wave and the actual direction of the water flow is measured by the tilt sensor of the radar flow velocity measurement sensor;

[0020] The water flow velocity is obtained based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow.

[0021] Optionally, the step of obtaining the water flow velocity based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow includes:

[0022] The water flow velocity is calculated based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, the angle between the third electromagnetic wave and the actual direction of the water flow, and a preset formula; wherein the preset formula is:

[0023]

[0024] Where V is the water flow velocity, f p Let f0 be the intermediate frequency signal frequency of the radar antenna, c0 be the transmission frequency of the third electromagnetic wave, a be the speed of light, and a be the angle between the third electromagnetic wave and the actual direction of the water flow.

[0025] Optionally, the contact measurement method includes:

[0026] The pressure at the bottom of the drain pipe is obtained by a pressure measuring sensor installed at the bottom of the drain pipe;

[0027] The actual water level is calculated based on the pressure at the bottom of the drain pipe.

[0028] Optionally, the contact measurement method further includes:

[0029] The water flow velocity is measured using an ultrasonic velocity sensor.

[0030] Optionally, the difference between the height of the drain pipe and the preset value is greater than 1 cm.

[0031] Furthermore, to achieve the above objectives, the present invention also proposes a pipeline flow measurement system, the pipeline flow measurement system comprising:

[0032] The measurement system body includes a radar water level sensor, a radar flow velocity sensor, an ultrasonic velocity sensor, and a pressure sensor. The radar flow velocity sensor includes a radar antenna and a tilt sensor; and...

[0033] A control device electrically connected to the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor, the control device comprising: a memory, a processor, and a pipeline flow measurement program stored in the memory and executable on the processor, the pipeline flow measurement program being configured to implement the steps of the pipeline flow measurement method described above.

[0034] Optionally, the measurement system body further includes a wireless communication device, which is electrically connected to the control device, the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor.

[0035] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a pipeline flow measurement program, which, when executed by a processor, implements the steps of the pipeline flow measurement method described in any of the above claims.

[0036] The pipeline flow measurement method of the present invention can accurately distinguish between a full pipe state (where the water level is greater than a preset value) and a non-full pipe state (where the water level is less than a preset value) by obtaining the water level height in the sewer pipe. Correspondingly, contact measurement and non-contact measurement methods are adopted, effectively avoiding the influence of water quality, silt and garbage in the sewer pipe, thereby improving the accuracy of water level height and water flow velocity measurement in the sewer pipe. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the control device structure of the hardware operating environment involved in the embodiments of the present invention;

[0038] Figure 2 This is a schematic flowchart of the first embodiment of the pipeline flow measurement method of the present invention;

[0039] Figure 3This is a schematic flowchart of the second embodiment of the pipeline flow measurement method of the present invention;

[0040] Figure 4 This is a schematic flowchart of the third embodiment of the pipeline flow measurement method of the present invention;

[0041] Figure 5 This is a schematic flowchart of the fourth embodiment of the pipeline flow measurement method of the present invention;

[0042] Figure 6 This is a schematic flowchart of the fifth embodiment of the pipeline flow measurement method of the present invention.

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0045] The pipeline flow measurement system proposed in this embodiment of the invention includes: a measurement system body, comprising a radar water level sensor, a radar flow velocity sensor, an ultrasonic velocity sensor, and a pressure sensor. The radar flow velocity sensor includes a radar antenna and a tilt sensor. The measurement system body is installed on the top of the sewer pipe. The radar flow velocity sensor and the ultrasonic velocity sensor are respectively installed at both ends of the measurement system body, and the pressure sensor and the radar water level sensor are installed at the bottom of the measurement system body. A control device is electrically connected to the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor. The control device includes: a memory, a processor, and a pipeline flow measurement program stored in the memory and executable on the processor.

[0046] Furthermore, the measurement system body also includes a wireless communication device, which is electrically connected to the control device, the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor. The wireless communication device is used to exchange data with a network server. To ensure the communication effectiveness of the wireless communication device, it is installed on the ground. Alternatively, to avoid damaging the ground, the wireless communication device can also be a simple remote communication terminal installed on the wall of the sewer manhole.

[0047] Reference Figure 1 , Figure 1 This is a schematic diagram of the control device structure for the hardware operating environment involved in the embodiments of the present invention.

[0048] like Figure 1 As shown, the control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the control device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a pipeline flow measurement program.

[0051] exist Figure 1 In the control device shown, the network interface 1004 is mainly used for data communication with the wireless communication device; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 of the control device of the present invention can be set in the pipeline flow measurement device. The control device calls the pipeline flow measurement program stored in the memory 1005 through the processor 1001 and executes the pipeline flow measurement method provided in the embodiment of the present invention.

[0052] This invention provides a method for measuring pipeline flow rate, referring to... Figure 2 , Figure 2 This is a schematic flowchart of the first embodiment of the pipeline flow measurement method provided by the present invention.

[0053] In this embodiment, the pipeline flow measurement method includes the following steps:

[0054] Step S10: Obtain the water level in the drain pipe;

[0055] In this embodiment, there are many ways to obtain the water level in the sewer pipe. Specifically, a non-contact measurement method can be used. A non-contact measurement method refers to a method in which the measuring device can accurately measure the liquid level parameters without contacting the liquid surface. Various measuring devices can be used for non-contact measurement. For example, a radar water level sensor can emit a first electromagnetic wave to the liquid surface in the sewer pipe, receive a second electromagnetic wave returning from the liquid surface, calculate the time interval between emitting the first electromagnetic wave and receiving the second electromagnetic wave, and multiply this time interval by the speed of light to obtain the distance from the electromagnetic wave emitting device to the liquid surface. Furthermore, the distance from the electromagnetic wave emitting device to the bottom of the sewer pipe is known, thus allowing the calculation of the water level in the sewer pipe. Of course, a contact measurement method can also be used, which means installing the measuring device within the liquid surface of the drain pipe. Specifically, a water level gauge can be used to obtain the water level height by reading the gauge. Alternatively, a pressure sensor can be used, installed at the bottom of the measuring system body. The pressure sensor measures the current pressure data, and the liquid level depth at which the pressure sensor is located can be calculated based on the current pressure. The distance from the pressure sensor to the bottom of the drain pipe is known, thus allowing the determination of the water level height within the drain pipe. Considering that the pressure sensor is installed at the bottom of the measuring system body, located at the top of the drain pipe, the water level height cannot be accurately measured when the drain pipe is not full. Since the drain pipe is primarily in a non-full state, step S10 first employs a non-contact measurement method.

[0056] Step S20: Determine whether the water level is less than a preset value;

[0057] In this embodiment, determining whether the water level is greater than a preset value is primarily because non-contact measuring devices have low measurement accuracy when the distance to the liquid surface is less than a certain value. Therefore, within this distance, a contact measurement method can achieve better measurement results. Furthermore, the preset value can also be used to distinguish the liquid level conditions in the sewer pipe, classifying the sewer pipe's liquid level state into a full pipe state and a non-full pipe state. Thus, different measurement methods can be adopted according to the liquid level state of the sewer pipe. In this embodiment, it can be determined whether the water level is less than a preset value, thereby selectively adopting either a contact or non-contact measurement method to achieve the best measurement accuracy.

[0058] Step S30: When the water level is less than the preset value, a non-contact measurement method is used to obtain the actual water level and flow velocity in the sewer pipe.

[0059] In this embodiment, a non-contact measurement method is used to obtain the actual water level and flow velocity within the sewer pipe. The non-contact measurement method refers to a measurement method where the measuring device is installed outside the liquid surface of the sewer pipe. This effectively avoids the influence of poor water quality, silt, and debris within the sewer pipe on the measurement results. Furthermore, when the water level is measured using the non-contact method in step S10, this water level can be directly used as the actual water level in step S30, simplifying the operation. Specifically, a radar water level sensor and a radar flow velocity sensor can be used to measure the liquid surface by sending electromagnetic waves, or ultrasonic waves can be sent to the liquid surface to measure the distance from the device to the liquid surface and the flow velocity.

[0060] Step S40: When the water level is not less than the preset value, the actual water level and flow velocity in the sewer pipe are obtained by a contact measurement method.

[0061] In this embodiment, when the water level is not less than the preset value, a contact measurement method is used to obtain the actual water level and flow velocity in the sewer pipe. This is because the non-contact measurement method is only applicable when the measuring device is not in contact with the liquid surface. When the measuring device is in contact with the liquid surface, the accuracy of the measurement will be greatly reduced. Therefore, when the non-contact measurement method is used in step S10, the measured water level is not accurate, and the water level needs to be measured again using the contact measurement method to obtain the actual water level. Furthermore, the contact measurement method can obtain a more accurate flow velocity.

[0062] Step S50: Calculate the flow rate of the sewer pipe based on the actual water level and the water flow velocity.

[0063] In this embodiment, when the actual water level is known, the liquid surface area of ​​the corresponding cross-section inside the drain pipe is also easy to obtain. At this time, combined with the water flow velocity, the flow rate can be directly calculated. This is common knowledge in the field and will not be elaborated here.

[0064] In this embodiment, by obtaining the water level height inside the sewer pipe, it is possible to accurately distinguish between a full pipe state where the water level height is greater than a preset value and a non-full pipe state where the water level height is less than a preset value. Correspondingly, contact measurement and non-contact measurement methods are adopted, effectively avoiding the influence of water quality, silt and garbage inside the sewer pipe, thereby improving the accuracy of water level height and water flow velocity measurement inside the sewer pipe.

[0065] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the flow measurement method in this invention;

[0066] In this embodiment, the non-contact measurement method includes:

[0067] Step S301: The first electromagnetic wave is emitted to the liquid surface in the sewer pipe through the radar water level measuring sensor;

[0068] Step S302: Receive the second electromagnetic wave returning from the liquid surface;

[0069] Step S303: Calculate the distance between the radar water level sensor and the liquid surface based on the time interval between the first electromagnetic wave and the second electromagnetic wave;

[0070] Step S304: Calculate the actual water level height based on the distance between the radar water level sensor and the liquid surface;

[0071] The radar water level sensor is installed at the top of the sewer pipe. The distance from the electromagnetic wave transmitter of the radar water level sensor to the bottom of the sewer pipe is known. The sensor emits a first electromagnetic wave towards the liquid surface in the sewer pipe and receives a second electromagnetic wave returning from the surface. The time interval between the emission and reception of the first and second electromagnetic waves is calculated. Multiplying this time interval by the speed of light yields the distance from the electromagnetic wave transmitter to the liquid surface. Furthermore, since the distance from the electromagnetic wave transmitter to the bottom of the sewer pipe is also known, subtracting the distance from the transmitter to the liquid surface from this distance gives the actual water level in the sewer pipe. This configuration effectively avoids the influence of poor water quality, silt, and debris in the sewer pipe on the measurement results.

[0072] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the flow measurement method of the present invention;

[0073] Non-contact measurement methods also include:

[0074] Step S305: A third electromagnetic wave is emitted into the water pipe via the radar flow velocity sensor;

[0075] Step S306: Obtain the transmission frequency of the third electromagnetic wave and the intermediate frequency signal frequency of the radar antenna of the radar flow velocity measuring sensor;

[0076] Step S307: Measure the angle between the third electromagnetic wave and the actual direction of the water flow using the tilt sensor of the radar flow velocity measuring sensor;

[0077] Step S308: Obtain the water flow velocity based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow.

[0078] Specifically, when there is relative motion between the wave source and the water surface, the frequency of the reflected electromagnetic wave will change. This change in frequency is called the radar intermediate frequency signal frequency. Non-contact measurement methods for water flow velocity can use laser velocimeters or radar flow velocity sensors. Compared to other non-contact measurement devices, radar flow velocity sensors have advantages such as better penetration, less susceptibility to surface debris, and more accurate measurement results.

[0079] Furthermore, the step of obtaining the water flow velocity based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow includes:

[0080] The water flow velocity is calculated based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, the angle between the third electromagnetic wave and the actual direction of the water flow, and a preset formula; wherein the preset formula is:

[0081]

[0082] Where V is the water flow velocity, f p Let f0 be the intermediate frequency signal frequency of the radar antenna, c0 be the transmission frequency of the third electromagnetic wave, a be the speed of light, and a be the angle between the third electromagnetic wave and the actual direction of the water flow.

[0083] Measuring the flow velocity of liquid in a drainpipe using a radar flow velocity sensor effectively avoids the influence of poor water quality, silt, and debris in the pipes on the measurement results. This improves the accuracy of the flow velocity measurement. Furthermore, by calculating the flow velocity using the aforementioned formula, only the angle between the third electromagnetic wave and the actual direction of the water flow and the intermediate frequency signal frequency of the radar antenna need to be accurately measured to obtain the flow velocity. This requires less data and yields accurate flow velocity measurement results.

[0084] refer to Figure 5 , Figure 5 This is a flowchart illustrating the fourth embodiment of the flow measurement method in this invention;

[0085] In this embodiment, the contact measurement method includes:

[0086] Step S401: Obtain the liquid level depth at the location of the pressure measuring sensor by using the pressure measuring sensor installed in the sewer pipe;

[0087] Step S402: Calculate the actual water level height based on the liquid surface depth where the pressure measuring sensor is located;

[0088] A pressure sensor is installed at the bottom of the measurement system. The sensor measures the current pressure. The liquid in the sewer pipe is primarily water, with a known density and the Earth's acceleration. Given the known pressure, the depth of the liquid at the sensor's location can be directly calculated. The specific conversion formula is existing technology and will not be elaborated here. Furthermore, the distance from the pressure sensor to the bottom of the sewer pipe is known. Therefore, knowing the depth of the liquid at the sensor's location, the actual water level in the sewer pipe is the sum of these two factors. Positioning the pressure sensor at the bottom of the measurement system, while the system itself is installed at the top of the sewer pipe, effectively prevents the sensor from being affected by silt or debris within the pipe, thus ensuring the accuracy of the measurement results.

[0089] refer to Figure 6 , Figure 6 This is a flowchart illustrating the fifth embodiment of the flow measurement method of the present invention.

[0090] In addition, contact measurement methods also include:

[0091] Step S403: Measure the water flow velocity using an ultrasonic speed sensor.

[0092] In the non-contact measurement method, when the pipe is full, the radar flow velocity sensor is immersed in the liquid surface. Electromagnetic waves attenuate rapidly in water. When the water level submerges the radar flow velocity sensor, the electromagnetic waves can hardly propagate in the water. At this time, using an ultrasonic velocity sensor can obtain more accurate measurement results.

[0093] Because non-contact measuring devices have low measurement accuracy when the distance to the liquid surface is small, such as the commonly used radar measuring device, the measurement result is no longer accurate when the distance to the liquid surface is less than 1cm. The difference between the height value of the drain pipe and the preset value is greater than 1cm, thus ensuring the accuracy of the measurement result in the non-contact measurement method, and also ensuring the accuracy of the measurement result in the full pipe state.

[0094] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0095] In addition, for technical details not described in detail in this embodiment, please refer to the pipeline flow measurement method provided in any embodiment of the present invention, which will not be repeated here.

[0096] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0097] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0098] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0099] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for measuring pipeline flow rate, characterized in that, The method includes: To obtain the water level in the sewer pipe; Determine whether the water level is less than a preset value; When the water level is less than the preset value, a non-contact measurement method is used to obtain the actual water level and flow velocity in the sewer pipe. When the water level is not less than the preset value, the actual water level and flow velocity in the sewer pipe are obtained by a contact measurement method. Calculate the flow rate of the sewer pipe based on the actual water level and the water flow velocity. The non-contact measurement method includes: The first electromagnetic wave is emitted to the liquid surface in the sewer pipe by a radar water level measuring sensor. Receive the second electromagnetic wave returning from the liquid surface; The distance between the radar water level sensor and the liquid surface is calculated based on the time interval between the first electromagnetic wave and the second electromagnetic wave. The actual water level height is calculated based on the distance between the radar water level sensor and the liquid surface. A third electromagnetic wave is emitted from the liquid surface in the lower water pipe by a radar flow velocity sensor. The transmission frequency of the third electromagnetic wave and the intermediate frequency signal frequency of the radar antenna of the radar flow velocity measuring sensor are obtained. The angle between the third electromagnetic wave and the actual direction of the water flow is measured by the tilt sensor of the radar flow velocity measurement sensor; The water flow velocity is obtained based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow. The contact measurement method includes: The water flow velocity is measured using an ultrasonic speed sensor; The liquid level depth at which the pressure sensor is located is obtained by installing a pressure sensor in the sewer pipe; the actual water level height is calculated based on the liquid level depth at which the pressure sensor is located.

2. The pipeline flow measurement method as described in claim 1, characterized in that, The step of obtaining the water flow velocity based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, and the angle between the third electromagnetic wave and the actual direction of the water flow includes: The water flow velocity is calculated based on the transmission frequency of the third electromagnetic wave, the intermediate frequency signal frequency of the radar antenna, the angle between the third electromagnetic wave and the actual direction of the water flow, and a preset formula; wherein the preset formula is: Where V is the water flow velocity. The intermediate frequency (IF) signal frequency of the radar antenna. The transmission frequency of the third electromagnetic wave. At the speed of light, It is the angle between the third electromagnetic wave and the actual direction of the water flow.

3. The pipeline flow measurement method as described in claim 1, characterized in that, The difference between the height of the drain pipe and the preset value is greater than 1 cm.

4. A pipeline flow measurement system, characterized in that, include: The measurement system body includes a radar water level sensor, a radar flow velocity sensor, an ultrasonic velocity sensor, and a pressure sensor. The radar flow velocity sensor includes a radar antenna and a tilt sensor; and... A control device electrically connected to the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor, the control device comprising: a memory, a processor, and a pipeline flow measurement program stored in the memory and executable on the processor, the pipeline flow measurement program being configured to implement the steps of the pipeline flow measurement method as described in any one of claims 1 to 3.

5. The pipeline flow measurement system as described in claim 4, characterized in that, The measurement system body also includes a wireless communication device, which is electrically connected to the control device, the radar water level sensor, the radar flow velocity sensor, the ultrasonic velocity sensor, and the pressure sensor.

6. A storage medium, characterized in that, The storage medium stores a pipeline flow measurement program, which, when executed by a processor, implements the steps of the pipeline flow measurement method as described in any one of claims 1 to 3.

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