Method and device for determining topological relation of pipelines around building

Abstract

The invention provides a method and device for determining the topological relation of pipelines around a building, and the method comprises the steps: constructing a sound transmitting device and a sound receiving device, releasing an impact ball to impact a pipe wall to generate a vibration signal, and determining the topological relation of the pipelines around the building based on a fixed distance between the sound transmitting device and the sound receiving device and a signal receiving time interval. Calculating the propagation speed of sound waves in the pipeline, judging the topological connectivity according to the signal receiving state of the sound receiving device, and determining a connected node set; and calculating the distance between the connected nodes by using the propagation velocity, and estimating the approximate length of the route through the sound transmission arrival time, thereby realizing the identification of the path trend of the pipe section. The method is easy to implement, high in safety, low in cost, high in accuracy and high in engineering application value.

Description

Technical Field

[0001] The present invention belongs to the field of municipal pipe network survey, and in particular to a method and a device for determining the topological relationship of pipes around a building. Background Art

[0002] Urban drainage network surveys often utilize RTK (real-time kinematic measurement) to spatially locate specific manholes (points). Probing, visual inspection, and QV (pipeline endoscopic inspection) methods are used to determine the routing of pipe sections between manholes. However, when routing pipelines are buried within structures or when there are no manholes along the way, surveyors rely solely on engineering experience to determine the network's routing and the next manhole. These estimates often suffer from angular errors and may even lead to incorrect routing. Therefore, a portable surveying tool is needed to support the survey and verification of various types of complex pipeline routes. Summary of the Invention

[0003] The purpose of the present invention is to address the defects of the existing technology and provide a method and device for determining the topological relationship of pipelines around a building, constructing a sound transmitting device and a receiving device to realize the determination of device connectivity, and estimating the approximate length of the route through the sound propagation arrival time to realize the identification of the pipe section path direction.

[0004] A first aspect of the present invention provides a method for determining the topological relationship of pipelines around a building, comprising the following steps: Deploy sound signaling devices and sound receiving devices on pipes around the building, wherein the sound signaling devices include impact balls; By releasing the impact ball to hit the pipe wall to generate a vibration signal, the propagation speed of the sound wave in the pipe is calculated based on the fixed distance between the sound transmitting device and the sound receiving device and the signal receiving time interval; Determine the topological connectivity based on the signal receiving state of the sound receiving device and determine the connected node set; calculate the distance between the connected nodes using the propagation speed; Establish a topological central node, define the length variables from each connected node to the central node, and construct a linear equation system based on the distance between nodes; Select any node from the connected nodes as the new sending end, repeat the above collision, measurement and calculation steps to obtain additional distance constraint equations; All equations are solved simultaneously to obtain the length of each pipeline segment, thereby determining the pipeline topology.

[0005] Preferably, the propagation speed is calculated based on a preset fixed distance between the sound transmitting device and the sound receiving device.

[0006] Preferably, the topological connectivity is determined as follows: if each detection position receives a vibration signal, it is confirmed to have topological connectivity; if no sound signal is received, it is confirmed to have no topological connectivity.

[0007] Preferably, the step of selecting any one of the connected nodes as the new sending end adopts an equal probability random selection method, and the probability of each connected node being selected as the new sending end is equal.

[0008] Preferably, the step of solving the relationship between the lengths of the pipeline sections is to numerically solve the linear equations using a mathematical calculation method, and the mathematical calculation method includes but is not limited to Gaussian elimination method, matrix inversion method or iterative algorithm.

[0009] Preferably, an inverted cone-shaped through hole is opened at the top of the pipe, and the impact point of the impact ball is located in the inverted cone-shaped through hole, so that the impact sound is transmitted from the inside of the pipe.

[0010] Preferably, the sound receiving device includes a microphone, a receiving hole is provided on the pipe, and the microphone is arranged in the receiving hole so that the microphone directly receives the sound signal propagating in the pipe.

[0011] A second aspect of the present invention provides an apparatus for implementing the above-mentioned method for determining the topological relationship of pipelines around a building, comprising: A sound signaling device comprising a fixing device and a signaling assembly connected to the fixing device, wherein the signaling assembly comprises an electromagnet and an impact ball magnetically connected to the electromagnet; A sound receiving device comprising a fixing device and a receiving assembly connected to the fixing device, wherein the receiving assembly comprises a battery, a microphone, a high-precision timer, and a signal receiving and processing unit, wherein the battery powers the electromagnet, the microphone, the high-precision timer, and the signal receiving and processing unit; The fixing device is used to connect with the pipeline.

[0012] Preferably, both the sound transmitting device and the sound receiving device are provided with a magnetic wire connector, and the battery supplies power to the electromagnet via the magnetic wire.

[0013] Preferably, the fixing device is a fixing ring, a fixing plate or an automatic restraining belt, Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method and device for determining the topological relationship of pipelines around a building, which uses the propagation of sound in the pipelines to determine the pipeline topological relationship, and has the following beneficial effects: Non-invasive and highly safe: Measurement is performed by releasing an iron ball to hit the pipe wall to generate a sound signal. There is no need to cut or punch the pipe, which avoids damage to the building's piping system and does not affect the normal use and structural integrity of the pipe. There is no need for personnel to enter the pipe, which reduces operational risks and ensures personnel safety.

[0014] Low cost: The invention uses relatively simple transmitting and receiving devices, and utilizes the impact of iron balls to generate sound signals, eliminating the need for complex and expensive specialized testing equipment or technology, significantly reducing testing costs. Furthermore, it eliminates the need for complex testing wiring or installation of special sensors, further reducing costs.

[0015] Efficient and convenient: Through a simple iron ball release and sound reception measurement, the required pipeline topology data can be quickly obtained. Compared with some traditional pipeline inspection methods, such as those that require a large amount of manpower for on-site surveys and drawing drawings, this invention can complete measurements and calculations in a shorter time, improving work efficiency and saving time and costs.

[0016] High accuracy: Distance is calculated based on the speed of sound propagation and time interval. The principle is clear, and the propagation of sound in the pipeline is relatively stable and is less affected by the external environment. As long as the time interval and distance are accurately measured, the length of each pipeline section can be calculated more accurately, thereby accurately determining the topological relationship of the pipeline, providing a reliable basis for subsequent pipeline maintenance, modification and other work.

[0017] Wide Applicability: This method is applicable to piping systems around buildings of various shapes and layouts, whether simple straight pipes or complex branching pipe networks. Furthermore, the method can be used to detect pipes made of different materials, as long as sound can propagate stably through them, demonstrating its high versatility and adaptability.

[0018] Strong scalability: This method has good scalability. If it is necessary to further improve the measurement accuracy or obtain more pipeline information, the number of sending and receiving devices can be increased on this basis, or other detection technologies such as pressure detection and flow detection can be combined to achieve more comprehensive and in-depth detection and analysis of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0021] Figure 3 The figure is a calculation diagram of a preferred embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the structure of a voice signaling device in one embodiment of the present invention.

[0023] Figure 5 FIG. 1 is a structural diagram of a sound receiving device in an embodiment of the present invention.

[0024] In the above drawings: 1. Pipeline one; 2. Pipeline two; 3. Pipeline three; 4. Pipeline four; 5. Pipeline five; 6. Pipeline six; 7. Pipeline seven; 8. Sound transmitting device; 9. Sound receiving device; 10. Magnetic wire; 11. Fixing device. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments. However, it should be understood that the drawings are only for illustrative purposes and cannot be understood as limiting this patent; in order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the positional relationships described in the drawings are only for illustrative purposes and cannot be understood as limiting this patent.

[0026] When surveying pipeline topology, if the interior of a wall is inaccessible or the building is filled with concrete, traditional surveying methods cannot be used to determine the topology. Therefore, the present invention proposes to use the principle of sound wave propagation to determine the pipeline connectivity pattern and approximate distance by the sound arrival time.

[0027] As an embodiment of the present invention, see the attached Figure 1-Figure 5 This embodiment provides a method for determining the topological relationship of pipelines around a building, comprising the following steps: Deploy sound signaling devices 8 and sound receiving devices 9 on pipes around the building, wherein the sound signaling device 8 includes an impact ball; By releasing the impact ball to hit the pipe wall to generate a vibration signal, the propagation speed of the sound wave in the pipe is calculated based on the fixed distance between the sound transmitting device 8 and the sound receiving device 9 and the signal receiving time interval; Determine the topological connectivity based on the signal receiving state of the sound receiving device and determine the connected node set; calculate the distance between the connected nodes using the propagation speed; Establish a topological central node, define the length variables from each connected node to the central node, and construct a linear equation system based on the distance between nodes; Select any node from the connected nodes as the new sending end, repeat the above collision, measurement and calculation steps to obtain additional distance constraint equations; All equations are solved simultaneously to obtain the length of each pipeline segment, thereby determining the pipeline topology.

[0028] The following are some specific examples: Figure 1 As shown, Figure 1 The picture shows a building. It can be seen that pipes are laid all around the building, but some pipes are buried inside the building. The connection topology of each pipe cannot be determined, and a survey is now needed to determine it.

[0029] According to the method of the present invention, first, a sound transmitter 8 and a sound receiver 9 are installed on the pipes around the building. Starting from the first pipe, an iron ball is released to hit the pipe wall. The distance between the sound transmitter and the sound receiver on the first pipe is l, and the time interval for the sound receiver to receive the sound after the impact is t. Then, the propagation speed of the sound wave on the pipe wall is l / t1.

[0030] Subsequently, pipes 2, 3, and 7 received sounds successively, and the time intervals from the release of the iron ball were t2, t3, and t7. Pipes 4, 5, and 6 did not receive sounds. Therefore, it was determined that pipes 1, 2, 3, and 7 were topologically connected. That is, the topological connectivity was judged as follows: if each detection position received a vibration signal, it was confirmed to have topological connectivity; if no sound signal was received, it was confirmed to have no topological connectivity.

[0031] According to the aforementioned speed of sound, the distances between them are calculated as l 12 、l 13 、l 17 , establish topology node 0, such as Figure 3 As shown, the length of each endpoint introduced to the common node is l 10 、l 20 、l 30 、l 70 , then we have the following relationship: l 10 +l 70 =l 17 ; l 10 +l 20 =l 12 ; l 10 +l 30 =l 13 ; At this point, a set of measurement values is still missing. A transmitter is selected from pipelines 2, 3, and 7. A node is selected from the connected nodes as the new transmitter. An equal-probability random selection method is used, and each connected node has an equal probability of being selected as the new transmitter. Taking pipeline 2 as an example, repeating the above steps yields the following relationship: l 20 +l70 =l 27 ; By combining the above formulas, solving the length of each segment, we can obtain the pipeline topology.

[0032] Repeat the above steps again to further survey the relationship between pipelines 4, 5, and 6.

[0033] In the above calculation process, the step of solving the relationship between the lengths of each section of the pipeline adopts a mathematical calculation method to numerically solve the linear equations. The mathematical calculation method includes but is not limited to Gaussian elimination method, matrix inversion method or iterative algorithm.

[0034] It can be understood that in the above calculation process, the calculation of the propagation speed needs to be performed based on a preset fixed distance between the sound transmitting device and the sound receiving device; the topological connectivity judgment is achieved by detecting whether the vibration signal is received at each position.

[0035] In the above embodiment, the calculation of the propagation speed is based on a preset fixed distance l between the sound signaling device and the sound receiving device, and this fixed distance is determined when the sound signaling device and the sound receiving device are installed.

[0036] In some preferred embodiments, an inverted cone-shaped through hole is opened at the top of the pipe, and the impact point of the impact ball is located in the inverted cone-shaped through hole, so that the impact sound is transmitted from the inside of the pipe.

[0037] In a preferred embodiment, the sound receiving device includes a microphone, a receiving hole is provided on the pipe, and the microphone is arranged in the receiving hole so that the microphone directly receives the sound signal propagating in the pipe.

[0038] As another preferred embodiment of the present invention, this embodiment provides an apparatus for implementing the above-mentioned method for determining the topological relationship of pipelines around a building, comprising: like Figure 4 As shown, the sound signaling device 8 includes a fixing device 11 and a signaling component connected to the fixing device 11, wherein the signaling component includes an electromagnet and an impact ball magnetically connected to the electromagnet; like Figure 5 As shown, the sound receiving device 9 includes a fixing device 11 and a receiving component connected to the fixing device 11, the receiving component includes a battery, a microphone, a high-precision timer and a signal receiving and processing unit, and the battery is used to power the electromagnet, the microphone, the high-precision timer and the signal receiving and processing unit; The fixing device 11 is used to connect with the pipeline.

[0039] Preferably, both the sound transmitting device 8 and the sound receiving device 9 are provided with magnetic wire connectors, and the battery supplies power to the electromagnet via the magnetic wire 10 .

[0040] As a preferred structure, the fixing device 11 adopts an automatic clip belt, a magnetic sheet or other structural forms, as long as it can be fixed to the pipeline, preferably using Figure 2 The automatic tie straps shown have an arcuate cross-section, which makes them appear straight and long in a naturally balanced state. When bent by external forces, they quickly curl and cling to the outer wall of the pipe, allowing for quick assembly and disassembly. Other structural forms, such as pipe clamps and retaining clips, are also possible.

[0041] It should be noted that in the description of the present invention, the working principles and structural forms of well-known components such as electromagnets and microphones do not belong to the technical points of the improvement of the present invention, so this part of the content will not be described in detail, but it should be understood that for those skilled in the art, this does not affect the implementation of the present invention.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for determining the topological relationship of pipelines around a building, characterized in that: The following steps are involved: Deploy sound signaling devices and sound receiving devices on pipes around the building, wherein the sound signaling devices include impact balls; By releasing the impact ball to hit the pipe wall to generate a vibration signal, the propagation speed of the sound wave in the pipe is calculated based on the fixed distance between the sound transmitting device and the sound receiving device and the signal receiving time interval; Determine the topological connectivity based on the signal receiving state of the sound receiving device and determine the connected node set; calculate the distance between the connected nodes using the propagation speed; Establish a topological central node, define the length variables from each connected node to the central node, and construct a linear equation system based on the distance between nodes; Select any node from the connected nodes as the new sending end, repeat the above collision, measurement and calculation steps to obtain additional distance constraint equations; All equations are solved simultaneously to obtain the length of each pipeline segment, thereby determining the pipeline topology.

2. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: The propagation speed is calculated based on a preset fixed distance between the sound transmitting device and the sound receiving device.

3. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: The topological connectivity is determined as follows: if each detection position receives a vibration signal, it is confirmed to have topological connectivity; if no sound signal is received, it is confirmed to have no topological connectivity.

4. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: The step of selecting any one of the connected nodes as the new sending end adopts an equal probability random selection method, and the probability of each connected node being selected as the new sending end is equal.

5. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: The step of solving the relationship between the lengths of the pipeline sections is to use a mathematical calculation method to numerically solve the linear equations.

6. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: An inverted cone-shaped through hole is provided on the top of the pipe, and the impact point of the impact ball is located in the inverted cone-shaped through hole, so that the impact sound is transmitted from the inside of the pipe.

7. The method for determining the topological relationship of pipelines around a building according to claim 1, characterized in that: The sound receiving device includes a microphone. A receiving hole is provided on the pipe, and the microphone is arranged in the receiving hole so that the microphone directly receives the sound signal propagating in the pipe.

8. A device for implementing the method for determining the topological relationship of pipelines around a building according to any one of claims 1 to 7, characterized in that: include: A sound signaling device comprising a fixing device and a signaling assembly connected to the fixing device, wherein the signaling assembly comprises an electromagnet and an impact ball magnetically connected to the electromagnet; A sound receiving device comprising a fixing device and a receiving assembly connected to the fixing device, wherein the receiving assembly comprises a battery, a microphone, a high-precision timer, and a signal receiving and processing unit, wherein the battery powers the electromagnet, the microphone, the high-precision timer, and the signal receiving and processing unit; The fixing device is used to connect with the pipeline.

9. The device according to claim 8, characterized in that The sound transmitting device and the sound receiving device are both provided with magnetic wire connectors, and the battery supplies power to the electromagnet via the magnetic wires.

10. The device according to claim 8, characterized in that The fixing device is a fixing ring, a fixing plate or an automatic restraining belt.

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