Three-dimensional pitot tube measurement method suitable for complex flue gas conditions and related device

Abstract

The invention discloses a three-dimensional pitot tube measurement method suitable for complex flue gas conditions and a related device, and the method comprises the steps: obtaining a thermal distribution diagram in a flue gas pipeline, and judging each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution diagram; adjusting the measurement position of each probe in the three-dimensional pitot tube sampling unit at each measurement point in the flue gas pipeline, so that the measurement position of each probe in the three-dimensional pitot tube sampling unit coincides with each measurement point obtained by judgment one by one; the flow velocity of the flue gas in the flue gas pipeline is measured based on the three-dimensional pitot tube sampling unit. The method and the related device can measure the flue gas by using the three-dimensional pitot tube.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission monitoring, and relates to a three-dimensional Pitot tube measurement method and related device applicable to complex flue gas conditions. Background Art

[0002] With the increasingly severe global climate change, carbon emission monitoring has become an important means of environmental protection and sustainable development.

[0003] Traditional carbon emission monitoring methods generally use conventional online monitoring instruments for flue gas flow rate and flow, which have poor adaptability to complex eddy current conditions and low measurement accuracy, resulting in low accuracy of the total carbon emission measurement and difficulty in meeting the carbon monitoring requirements.

[0004] As an advanced flow rate measurement device, the three-dimensional Pitot tube can measure the velocity of fluid in three-dimensional space, and has the advantages of high measurement accuracy and wide application range, and is widely used in the field of carbon emission monitoring.

[0005] Currently, when measuring the flow rate in a flue gas pipeline with a three-dimensional Pitot tube, the three-dimensional Pitot tube is generally fixed at an appropriate position in the flue gas pipeline and then measured through the three-dimensional Pitot tube. In this measurement method, the position of the three-dimensional Pitot tube is fixed and immovable. However, for complex flue gas conditions, the optimal measurement position of the flue gas will change with various factors, that is, the existing three-dimensional Pitot tube is not applicable to complex flue gas conditions.

[0006] In view of this, a three-dimensional Pitot tube measurement method applicable to complex flue gas conditions is designed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a three-dimensional Pitot tube measurement method and related device applicable to complex flue gas conditions, which can use the three-dimensional Pitot tube to measure flue gas.

[0008] To achieve the above purpose, the present invention discloses a three-dimensional Pitot tube measurement method applicable to complex flue gas conditions, including:

[0009] Obtain the thermal distribution map inside the flue gas pipeline, and judge each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map;

[0010] Adjust the measurement positions of each probe in the three-dimensional Pitot tube sampling unit for each measurement point in the flue gas pipeline, so that the measurement positions of each probe in the three-dimensional Pitot tube sampling unit coincide with the judged measurement points one by one;

[0011] Measure the flow rate of the flue gas in the flue gas pipeline based on the three-dimensional Pitot tube sampling unit.

[0012] A further improvement of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions according to the present invention lies in:

[0013] Furthermore, the process of obtaining the thermal distribution map inside the flue gas pipeline is as follows:

[0014] Obtain the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline;

[0015] Input the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline into the trained thermal distribution prediction model inside the flue gas pipeline to obtain the thermal distribution map inside the flue gas pipeline.

[0016] Furthermore, the thermal distribution prediction model inside the flue gas pipeline includes a multi-input network layer, a fusion layer, and an output layer. The multi-input network layer is respectively connected to each temperature sensor. The fusion layer is connected to the multi-input network layer, and the output layer is connected to the fusion layer. Each temperature sensor inputs the temperature data of each measurement point of the flue gas pipeline collected through the multi-input network into the fusion layer. The fusion layer fuses the temperature data of each measurement point of the flue gas pipeline and learns to generate the thermal distribution map inside the flue gas pipeline.

[0017] Furthermore, obtain the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline through a temperature monitoring device. Among them, the temperature monitoring device includes a temperature acquisition unit and a field temperature data acquisition and transmission unit;

[0018] The temperature acquisition unit includes two semi-circular mounting brackets and several temperature sensors. The two semi-circular mounting brackets form an annular mounting bracket, and each temperature sensor is arranged on the two semi-circular mounting brackets at equal intervals along the circumference of the annular mounting bracket; the field temperature data acquisition and transmission unit includes a signal isolator, an analog-to-digital converter, and a register. Each temperature sensor is electrically connected to the signal isolator, the signal isolator is electrically connected to the analog-to-digital converter, and the analog-to-digital converter is electrically connected to the register.

[0019] Furthermore, the three-dimensional Pitot tube sampling unit includes an annular mounting bracket, several electric cylinders, several hollow measuring rods, several probes, several pressure-taking gas pipes, and several positioners. Among them, one electric cylinder corresponds to one hollow measuring rod, one probe, one pressure-taking gas pipe, and one positioner. Each electric cylinder is arranged on the inner wall of the annular mounting bracket at equal intervals along the circumference. The output end of the electric cylinder is connected to one end of the hollow measuring rod, the other end of the hollow measuring rod is connected to the probe, the pressure-taking gas pipe is distributed inside the hollow measuring rod and is connected to the probe on the hollow measuring rod, and the positioner is arranged on the outer wall of the corresponding probe.

[0020] Furthermore, five pressure-taking holes are arranged on each probe.

[0021] Further, it further includes a field flow velocity data acquisition and transmission unit. The field flow velocity data acquisition and transmission unit includes an air chamber, an air pump, a gas pressure sensor, a signal isolator, and an analog-to-digital converter. The pressure-taking air pipe is connected to the air chamber. The outlet of the air chamber is connected to the air pump and the gas pressure sensor. The output end of the gas sensor is connected to an external device through the signal isolator and the analog-to-digital converter.

[0022] The present invention discloses a three-dimensional Pitot tube measurement system applicable to complex flue gas conditions, including:

[0023] A judgment module, configured to obtain a thermal distribution map inside the flue gas pipeline, and judge each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map;

[0024] An arrangement module, configured to adjust the measurement positions of each probe in the three-dimensional Pitot tube sampling unit for each measurement point in the flue gas pipeline, so that the measurement positions of each probe in the three-dimensional Pitot tube sampling unit coincide with each measurement point obtained by judgment one by one;

[0025] A field flow velocity data acquisition and transmission unit, configured to measure the flow velocity of the flue gas in the flue gas pipeline based on the three-dimensional Pitot tube sampling unit.

[0026] The present invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions are implemented.

[0027] The present invention discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions are implemented.

[0028] The present invention has the following beneficial effects:

[0029] When the three-dimensional Pitot tube measurement method and related device applicable to complex flue gas conditions of the present invention are specifically operated, the probes are arranged based on the temperature data of each measurement point in the flue gas pipeline collected by several temperature sensors and the thermal distribution map in the flue gas pipeline, and then the measurement is carried out based on the three-dimensional Pitot tube. Compared with the prior art, this measurement method has a grid-like multi-point distribution and the position can be moved, can measure at a suitable position in the flue gas pipeline, improves the measurement accuracy, and is applicable to complex flue gas conditions. Description of the Drawings

[0030] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is the flowchart of the method of the present invention;

[0032] Figure 2 is the schematic structural diagram of the temperature acquisition unit of the present invention;

[0033] Figure 3 is the schematic structural diagram of the three-dimensional Pitot tube sampling unit of the present invention;

[0034] Figure 4 is the schematic diagram of the structural distribution of the pressure tapping holes of the present invention. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0037] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0038] It should be further understood that the term " / and" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent: the existence of A alone, the existence of both A and B, and the existence of B alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the front and rear associated objects.

[0039] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0040] Depending on the context, as used herein, the term "if" can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] Schematic diagrams of various structures according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear illustration, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary. In practice, there may be deviations due to manufacturing tolerances or technical limitations, and those skilled in the art can additionally design regions / layers with different shapes, sizes and relative positions according to actual requirements.

[0043] Embodiment 1

[0044] Reference Figure 1 , the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions according to the present invention includes the following steps:

[0045] S1: Obtain the thermal distribution map inside the flue gas pipeline, and judge each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map;

[0046] S2: Adjust the measurement positions of each three-dimensional Pitot tube based on judging each measurement point in the flue gas pipeline, so that the measurement positions of each three-dimensional Pitot tube coincide with each judged measurement point one by one;

[0047] S3: Measure the flow velocity of the flue gas in the flue gas pipeline based on each three-dimensional Pitot tube and display it.

[0048] Specifically, the specific steps in step S1 are:

[0049] S11: Construct a temperature acquisition unit, where the temperature acquisition unit includes two semi-circular mounting brackets and a number of temperature sensors. The two semi-circular mounting brackets form a circular mounting bracket, and each temperature sensor is arranged on the two semi-circular mounting brackets at equal intervals along the circumference of the circular mounting bracket;

[0050] S12: Construct a field temperature data acquisition and transmission unit, where the field temperature data acquisition and transmission unit includes a signal isolator, an analog-to-digital converter, and a register. Each temperature sensor is electrically connected to the signal isolator through a wire, the signal isolator is electrically connected to the analog-to-digital converter through a wire, and the analog-to-digital converter is electrically connected to the register through a wire;

[0051] S13: Construct a data analysis, processing, and display unit. The data analysis, processing, and display unit includes a processor and a display. The processor is connected to the register, and the processor is electrically connected to the display through a wire;

[0052] S14: Place the two semi-circular mounting brackets on the outer wall of the flue gas pipeline and assemble them into a circular mounting bracket, and then fix them with bolts. At this time, the detection heads of each temperature sensor on the two semi-circular mounting brackets are closely attached to the flue gas pipeline to complete the installation of the temperature acquisition unit. Place the signal isolator, analog-to-digital converter, register, processor, and display in the monitoring room to complete the installation of the field temperature data acquisition and transmission unit and the data analysis, processing, and display unit. Connect each temperature sensor to the signal isolator through a wire, and connect the register to the processor through a wire;

[0053] S15: Construct a prediction model for the internal thermal distribution of the flue gas pipeline in the processor. Based on the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline collected by each temperature sensor, and use this as input data to train the prediction model for the internal thermal distribution of the flue gas pipeline. During the training process, adjust the parameters based on the thermal distribution map inside the flue gas pipeline until convergence. Among them, the thermal distribution map inside the flue gas pipeline is obtained based on the thermal imager carried by the drone;

[0054] The prediction model for the internal thermal distribution of the flue gas pipeline includes a multi-input network layer, a fusion layer, and an output layer. The multi-input network layer is respectively connected to each temperature sensor, the fusion layer is connected to the multi-input network layer, and the output layer is connected to the fusion layer. Each temperature sensor inputs the temperature data of each measurement point of the flue gas pipeline collected through the multi-input network to the fusion layer. The fusion layer fuses the temperature data of each measurement point of the flue gas pipeline and conducts learning to generate a thermal distribution map inside the flue gas pipeline, which is input by the output layer and compared with the thermal distribution map collected by the thermal imager carried by the drone. Based on the comparison result, adjust the model parameters until convergence;

[0055] S16: Predict the thermal distribution map inside the flue gas duct based on several temperature sensors and the thermal distribution prediction model inside the flue gas duct, and determine each measurement point inside the flue gas duct based on the streamline shape of the thermal distribution map.

[0056] Specifically, the specific steps in step S2 are as follows:

[0057] S21: Construct a three-dimensional Pitot tube sampling unit. The three-dimensional Pitot tube sampling unit includes an annular mounting frame, several electric cylinders, several hollow measuring rods, several probes, several pressure-taking air pipes, and several positioners. Each electric cylinder is arranged on the inner wall of the annular mounting frame at equal intervals in the circumferential direction. One hollow measuring rod corresponds to one electric cylinder. The output end of the electric cylinder is connected to one end of the hollow measuring rod, and the other end of the hollow measuring rod is connected to the probe. Five pressure-taking holes are provided on each probe. The pressure-taking air pipes are distributed inside the hollow measuring rod and are connected to the probe on the hollow measuring rod. One positioner corresponds to one probe, and the positioner is arranged on the outer wall of the corresponding probe.

[0058] The five pressure-taking holes on the probe are as shown in the attached Figure 4 description, and are respectively a central pressure-taking hole, a yaw pressure-taking hole, and a pitch pressure-taking hole. There are two yaw pressure-taking holes, which are respectively arranged on the left and right sides of the central pressure-taking hole. There are two pitch pressure-taking holes, which are respectively arranged on the upper and lower sides of the central pressure-taking hole;

[0059] S22: Set the annular mounting frame inside the flue gas duct, and electrically connect each electric cylinder and each positioner to the processor through wires. At this time, each probe is located in the detection area inside the flue gas duct;

[0060] S23: The processor controls each electric cylinder to start and drive based on the position of each measurement point inside the flue gas duct and the positioning information of each positioner. The electric cylinder drives the connected hollow measuring rod to move, and the hollow measuring rod drives the connected probe to move until the positions of each probe coincide with the positions of the measurement points obtained by judgment one by one;

[0061] The processor drives the electric cylinder based on the comparison of the position coordinates of the measurement points inside the flue gas duct and the position coordinates of the positioner. Once they coincide, stop driving.

[0062] Specifically, the specific steps in step S3 are as follows:

[0063] S31: Construct a field flow velocity data acquisition and transmission unit. The field flow velocity data acquisition and transmission unit includes an air chamber, an air pump, a gas pressure sensor, a signal isolator, an analog-to-digital converter, and a register. The air chamber is connected to the air pump and the gas pressure sensor through pipelines respectively. A solenoid valve is arranged on the pipeline. The gas pressure sensor is electrically connected to the signal isolator through a wire. The signal isolator is electrically connected to the analog-to-digital converter through a wire. The analog-to-digital converter is electrically connected to the register through a wire;

[0064] S32: Connect the pressure-taking gas pipe to the air chamber, place the air chamber, air pump, gas pressure sensor, signal isolator, analog-to-digital converter and register in the monitoring room, complete the installation of the on-site flow rate data acquisition and transmission unit, and electrically connect the register to the processor through a wire;

[0065] S33: The gas enters the air chamber through the pressure-taking holes and the pressure-taking gas pipe, and is homogenized based on natural diffusion in the air chamber. After homogenization, the solenoid valve is opened, and the gas enters the gas pressure sensor to detect the gas pressure, then the signal is isolated by the signal isolator, and after analog-to-digital conversion by the analog-to-digital converter, it is stored in the register. The processor periodically collects the saved pressure data, calculates the flue gas flow rate, and displays each real-time measurement parameter of the flue gas on the display;

[0066] Before the gas enters the air chamber through each pressure-taking hole and the pressure-taking gas pipe, start the air pump. The air pump inflates the air chamber, and the gas enters each pressure-taking gas pipe through the air chamber, and then enters the connected pressure-taking holes through each pressure-taking gas pipe to achieve purging and avoid the occurrence of pressure-taking hole blockage problems.

[0067] Embodiment 2

[0068] The three-dimensional Pitot tube measurement system applicable to complex flue gas conditions described in the present invention includes:

[0069] A judgment module, configured to obtain a thermal distribution map inside the flue gas pipeline, and judge each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map;

[0070] An arrangement module, configured to adjust the measurement positions of each probe in the three-dimensional Pitot tube sampling unit for each measurement point in the flue gas pipeline, so that the measurement positions of each probe in the three-dimensional Pitot tube sampling unit coincide with each measurement point obtained by judgment one by one;

[0071] An on-site flow rate data acquisition and transmission unit, configured to measure the flow rate of the flue gas in the flue gas pipeline based on the three-dimensional Pitot tube sampling unit.

[0072] In this embodiment, the process of obtaining the thermal distribution map inside the flue gas pipeline is as follows:

[0073] Obtain the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline;

[0074] Input the temperatures of each temperature measurement point on the inner wall of the flue gas pipeline into the trained prediction model of the internal thermal distribution of the flue gas pipeline to obtain the thermal distribution map inside the flue gas pipeline.

[0075] In this embodiment, the prediction model for the internal thermal distribution of the flue gas pipeline includes a multi-input network layer, a fusion layer, and an output layer. The multi-input network layer is respectively connected to each temperature sensor, the fusion layer is connected to the multi-input network layer, and the output layer is connected to the fusion layer. Each temperature sensor inputs the temperature data of each measurement point of the flue gas pipeline collected through the multi-input network into the fusion layer. The fusion layer fuses the temperature data of each measurement point of the flue gas pipeline and conducts learning to generate a thermal distribution map inside the flue gas pipeline.

[0076] In this embodiment, the temperature of each temperature measurement point on the inner wall of the flue gas pipeline is obtained through a temperature monitoring device. Among them, the temperature monitoring device includes a temperature acquisition unit and a field temperature data acquisition and transmission unit.

[0077] The temperature acquisition unit includes two semi-circular mounting brackets and several temperature sensors. The two semi-circular mounting brackets form a circular mounting bracket, and each temperature sensor is arranged on the two semi-circular mounting brackets at equal intervals along the circumference of the circular mounting bracket. The field temperature data acquisition and transmission unit includes a signal isolator, an analog-to-digital converter, and a register. Each temperature sensor is electrically connected to the signal isolator, the signal isolator is electrically connected to the analog-to-digital converter, and the analog-to-digital converter is electrically connected to the register.

[0078] In this embodiment, the three-dimensional Pitot tube sampling unit includes a circular mounting bracket, several electric cylinders, several hollow measuring rods, several probes, several pressure-taking gas pipes, and several positioners. Among them, one electric cylinder corresponds to one hollow measuring rod, one probe, one pressure-taking gas pipe, and one positioner. Each electric cylinder is arranged on the inner wall of the circular mounting bracket at equal intervals along the circumference. The output end of the electric cylinder is connected to one end of the hollow measuring rod, the other end of the hollow measuring rod is connected to the probe, the pressure-taking gas pipe is distributed inside the hollow measuring rod and is connected to the probe on the hollow measuring rod, and the positioner is arranged on the outer wall of the corresponding probe.

[0079] In this embodiment, five pressure-taking holes are provided on each probe.

[0080] In this embodiment, it further includes a field flow velocity data acquisition and transmission unit. Among them, the field flow velocity data acquisition and transmission unit includes an air chamber, an air pump, a gas pressure sensor, a signal isolator, and an analog-to-digital converter. Among them, the pressure-taking gas pipe is connected to the air chamber, the outlet of the air chamber is connected to the air pump and the gas pressure sensor, and the output end of the gas sensor is connected to an external device through the signal isolator and the analog-to-digital converter.

[0081] In the embodiments of the present application, the division of modules is illustrative, merely a logical function division. In actual implementation, there may be other division methods. Additionally, in each embodiment of the present application, each functional module may be integrated in a processor, may exist alone physically, or two or more modules may be integrated in one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0082] Embodiment III

[0083] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions. For example, it includes: obtaining a thermal distribution map inside the flue gas pipeline, determining each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map; adjusting the measurement positions of each probe in the three-dimensional Pitot tube sampling unit for each measurement point in the flue gas pipeline so that the measurement positions of each probe in the three-dimensional Pitot tube sampling unit coincide with the determined measurement points one by one; measuring the flow velocity of the flue gas in the flue gas pipeline based on the three-dimensional Pitot tube sampling unit. Among them, the memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc.; the processor, network interface, and memory are interconnected through an internal bus, and this internal bus may be an Industry Standard Architecture bus, a Peripheral Component Interconnect standard bus, an Extended Industry Standard Architecture bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0084] Embodiment IV

[0085] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions are implemented. For example, it includes: obtaining a thermal distribution map inside the flue gas pipeline, and judging each measurement point in the flue gas pipeline based on the streamline form of the thermal distribution map; adjusting the measurement positions of each probe in the three-dimensional Pitot tube sampling unit for each measurement point in the flue gas pipeline, so that the measurement positions of each probe in the three-dimensional Pitot tube sampling unit coincide with the judged measurement points one by one; measuring the flow velocity of the flue gas in the flue gas pipeline based on the three-dimensional Pitot tube sampling unit. Specifically, the computer-readable storage medium includes but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disc, magnetic disk, etc.

[0086] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0087] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0088] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the functions specified in one process or a plurality of processes and / or boxes Figure 1 in one or more processes and / or boxes Figure 1 steps for the functions specified in one box or a plurality of boxes.

[0090] After considering the specification and the disclosure of the invention, those skilled in the art will readily conceive of other embodiments of the invention. This application is intended to cover any variations, uses, or adaptations of the invention, which follow the general principles of the invention and include known common knowledge or conventional technical means in the technical field not disclosed by the invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the invention are pointed out by the following claims.

[0091] It should be understood that the invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is only limited by the appended claims.

[0092] The above are only the preferred embodiments of the invention, and do not impose any limitations on the invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the invention still fall within the protection scope of the technical solution of the invention.

Claims

1. A three-dimensional pitot tube measurement method suitable for complex flue gas conditions, characterized in that: include: Obtain a thermal distribution diagram inside the flue gas duct, and determine each measurement point in the flue gas duct based on the streamline shape of the thermal distribution diagram; The measuring points in the flue gas duct adjust the measuring positions of the probes in the three-dimensional pitot tube sampling unit so that the measuring positions of the probes in the three-dimensional pitot tube sampling unit coincide with the determined measuring points one by one; The flow velocity of flue gas in the flue gas duct is measured based on a three-dimensional pitot tube sampling unit.

2. The three-dimensional pitot tube measurement method suitable for complex flue gas conditions according to claim 1 is characterized in that: The process of obtaining the thermal distribution map inside the flue gas duct is as follows: Obtain the temperature of each temperature measuring point on the inner wall of the flue gas duct; The temperatures of the temperature measuring points on the inner wall of the flue gas duct are input into the trained prediction model of the thermal distribution inside the flue gas duct to obtain a thermal distribution map inside the flue gas duct.

3. The three-dimensional pitot tube measurement method suitable for complex flue gas conditions according to claim 2 is characterized in that: The internal thermal distribution prediction model of the flue gas duct includes a multi-input network layer, a fusion layer and an output layer. The multi-input network layer is connected to each temperature sensor respectively, the fusion layer is connected to the multi-input network layer, and the output layer is connected to the fusion layer. Each temperature sensor inputs the collected temperature data of each measuring point of the flue gas duct into the fusion layer through the multi-input network. The fusion layer fuses the temperature data of each measuring point of the flue gas duct and learns to generate a thermal distribution map inside the flue gas duct.

4. The three-dimensional pitot tube measurement method applicable to complex flue gas conditions according to claim 1 is characterized in that: The temperature of each temperature measuring point on the inner wall of the flue gas duct is obtained by a temperature monitoring device, wherein the temperature monitoring device includes a temperature acquisition unit and an on-site temperature data acquisition and transmission unit; The temperature acquisition unit includes two semicircular mounting frames and a plurality of temperature sensors, the two semicircular mounting frames constitute an annular mounting frame, and the temperature sensors are arranged on the two semicircular mounting frames at equal intervals along the circumference of the annular mounting frame; the field temperature data acquisition and transmission unit includes a signal isolator, an analog-to-digital converter and a register, each temperature sensor is electrically connected to the signal isolator, the signal isolator is electrically connected to the analog-to-digital converter, and the analog-to-digital converter is electrically connected to the register.

5. The three-dimensional pitot tube measurement method applicable to complex flue gas conditions according to claim 1 is characterized in that: The three-dimensional Pitot tube sampling unit includes an annular mounting frame, a plurality of electric cylinders, a plurality of hollow measuring rods, a plurality of probes, a plurality of pressure-taking air pipes and a plurality of positioners, wherein one electric cylinder corresponds to one hollow measuring rod, one probe, one pressure-taking air pipe and one positioner, and each electric cylinder is arranged on the inner wall of the annular mounting frame at equal intervals along the circumferential direction, the output end of the electric cylinder is connected to one end of the hollow measuring rod, and the other end of the hollow measuring rod is connected to the probe, the pressure-taking air pipe is distributed inside the hollow measuring rod and connected to the probe on the hollow measuring rod, and the positioner is arranged on the outer wall of the corresponding probe.

6. The three-dimensional pitot tube measurement method applicable to complex flue gas conditions according to claim 5 is characterized in that: Each probe is provided with five pressure holes.

7. The three-dimensional pitot tube measurement method applicable to complex flue gas conditions according to claim 5, characterized in that: It also includes an on-site flow rate data acquisition and transmission unit, wherein the on-site flow rate data acquisition and transmission unit includes an air chamber, an air pump, a gas pressure sensor, a signal isolator and an analog-to-digital converter, wherein the pressure air pipe is connected to the air chamber, the outlet of the air chamber is connected to the air pump and the gas pressure sensor, and the output end of the gas sensor is connected to external equipment via the signal isolator and the analog-to-digital converter.

8. A three-dimensional pitot tube measurement system suitable for complex flue gas conditions, characterized in that: include: A judgment module, used to obtain a thermal distribution diagram inside the flue gas duct, and judge each measurement point in the flue gas duct based on the streamline shape of the thermal distribution diagram; An arrangement module is used to adjust the measurement positions of the probes in the three-dimensional pitot tube sampling unit at each measurement point in the flue gas duct, so that the measurement positions of the probes in the three-dimensional pitot tube sampling unit coincide with the determined measurement points one by one; The on-site flow velocity data acquisition and transmission unit is used to measure the flow velocity of smoke in the smoke duct based on the three-dimensional pitot tube sampling unit.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the three-dimensional Pitot tube measurement method applicable to complex flue gas conditions as claimed in any one of claims 1 to 7 are implemented.

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