Acoustic burial depth measuring method for non-metallic buried pipe

Abstract

An acoustic burial depth measuring method for a non-metallic buried pipe, comprising the following steps: 1, determining the ground projection of a buried pipe (1) to be measured; 2, determining a depth measurement point on the projection, and providing three vibration signal receivers along a straight line in the normal direction of the projection, a first vibration signal receiver (2) being located at the depth measurement point; 3, using an acoustic frequency vibrator to continuously transmit a specific-frequency signal into the buried pipe (1), and recording a time difference tb between a moment at which a second vibration signal receiver (3) receives an acoustic wave signal and a moment at which the first vibration signal receiver (2) receives the acoustic wave signal, as well as a time difference tc between a moment at which a third vibration signal receiver (4) receives the acoustic wave signal and the moment at which the first vibration signal receiver (2) receives the acoustic wave signal; 4, calculating a distance d between the first vibration signal receiver (2), i.e., the depth measurement point, and the axis of the buried pipe (1); and 5, changing to a next depth measurement point to measure a next distance d until all distances d are obtained. The method optimizes the pipe burial depth measurement algorithm, reduces the restriction on the placement positions of signal receivers, and improves the measurement convenience and universality of non-metallic buried pipes.

Description

Acoustic burial depth detection method for non-metallic buried pipelines Technical Field

[0001] This invention relates to the field of underground pipeline burial depth detection technology, and in particular to an acoustic burial depth detection method for non-metallic buried pipelines. Background Technology

[0002] In existing technologies, the location and direction detection technology for non-metallic buried pipelines is relatively mature. However, in terms of pipeline burial depth detection technology, burial depth data is difficult to obtain due to factors such as soil quality, pipe material, and environment.

[0003] Taking ground-penetrating radar as an example, due to the characteristics of non-metallic pipe materials, radar waves can easily pass through the pipe, and the reflected wave signal is not obvious, making it difficult to determine the location of the pipe.

[0004] The acoustic vibration method can determine the location and direction of non-metallic buried pipelines by identifying the location of the maximum vibration wave on the ground. However, in terms of burial depth detection, the complexity of burial depth calculation and the high integration of detection equipment systems due to the large number of algorithm parameters make the detection technology difficult to promote and use. The following are some of the drawbacks when conducting burial depth detection for non-metallic buried pipelines:

[0005] 1. Current burial depth detection algorithms have many parameters and complex calculation processes.

[0006] 2. There are many restrictions on the placement of the signal receiver.

[0007] Therefore, how to efficiently and accurately obtain the acoustic burial depth of non-metallic buried pipelines has become a technical problem that urgently needs to be solved by those skilled in the art.

[0008] Summary of the Invention

[0009] In view of the above-mentioned deficiencies of the prior art, the present invention provides a method for acoustic burial depth detection of non-metallic buried pipelines, the purpose of which is to obtain the acoustic burial depth of non-metallic buried pipelines more efficiently and accurately.

[0010] To achieve the above objectives, this invention discloses an acoustic burial depth detection method for non-metallic buried pipelines, comprising the following steps:

[0011] Step 1: Determine the projection of the buried pipeline to be detected on the ground;

[0012] Step 2: Determine a sounding point on the projection of the buried pipeline, and arrange three vibration signal receivers along a straight line from the sounding point along the normal of the projection of the buried pipeline.

[0013] The first vibration signal receiver is located at the depth sounding point;

[0014] The distance between the first vibration signal receiver and the second vibration signal receiver is m;

[0015] The distance between the second vibration signal receiver and the third vibration signal receiver is n;

[0016] Step 3: Continuously transmit a specific frequency signal into the buried pipeline using an acoustic vibrator. After the first vibration signal receiver receives the acoustic signal, record the time difference t between the time when the second vibration signal receiver receives the acoustic signal and the time when the first vibration signal receiver receives the acoustic signal. b ,

[0017] and the time difference t between the time when the third vibration signal receiver receives the sound wave signal and the time when the first vibration signal receiver receives the sound wave signal. c ;

[0018] Step 4: Calculate the distance d between the first vibration signal receiver, i.e., the sounding point, and the axis of the buried pipeline;

[0019] Step 5: Move to the next sounding point and test the distance d between the next sounding point and the axis of the buried pipeline, until the distance d between all sounding points on the ground and the axis of the buried pipeline is obtained.

[0020] The formula for calculating the distance d between the first vibration signal receiver, i.e., the sounding point, and the axis of the buried pipeline is as follows:

[0021] The distance d between each depth measuring point and the axis of the buried pipeline is obtained by multiple measurements to remove large fluctuations in data, and finally obtains an accurate burial depth value.

[0022] The beneficial effects of this invention are:

[0023] This invention optimizes the pipeline burial depth detection algorithm, reduces the number of parameters required for burial depth detection, and solves the problem of cumbersome burial depth calculation; it also reduces the restrictions on the placement of signal receivers, improving the convenience and universality of non-metallic buried pipeline detection.

[0024] Compared to traditional algorithms, this invention uses fewer parameters, making the calculation process simpler and more efficient. Furthermore, it utilizes mobile terminals to automatically calculate burial depth values ​​in real time, eliminating the need for complex manual operations and specialized equipment, thus greatly improving detection efficiency and convenience.

[0025] The signal receiver in this invention can be placed anywhere within a large space, breaking the limitations of traditional layouts and effectively reducing the possibility of being restricted by environmental factors. For example, in complex terrain, narrow spaces, or areas with obstacles, the signal receiver can be flexibly arranged to ensure the smooth detection of non-metallic buried pipelines.

[0026] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0027] Figure 1 shows a schematic diagram of the arrangement of three sets of vibration signal receivers for three depth sounding points in one embodiment of the present invention.

[0028] Figure 2 shows a schematic diagram of the principle that the burial depth of any sounding point is obtained through three vibration signal receivers in one embodiment of the present invention. Detailed Implementation

[0029] Example

[0030] As shown in Figure 1, the acoustic burial depth detection method for non-metallic buried pipelines includes the following steps:

[0031] Step 1: Determine the projection of the buried pipeline 1 to be detected on the ground;

[0032] Step 2: Determine a sounding point on the projection of the buried pipeline 1, and arrange three vibration signal receivers along a straight line along the normal of the projection of the buried pipeline 1 at the sounding point.

[0033] The first vibration signal receiver 2 is located at the depth sounding point;

[0034] The distance between the first vibration signal receiver 2 and the second vibration signal receiver 3 is m;

[0035] The distance between the second vibration signal receiver 3 and the third vibration signal receiver 4 is n;

[0036] Step 3: Continuously transmit a specific frequency signal into the buried pipeline 1 using an acoustic vibrator. After the first vibration signal receiver 2 receives the acoustic signal, record the time difference t between the time when the second vibration signal receiver 3 receives the acoustic signal and the time when the first vibration signal receiver 2 receives the acoustic signal. b ,

[0037] The time difference t between the moment when the third vibration signal receiver 4 receives the sound wave signal and the moment when the first vibration signal receiver 2 receives the sound wave signal. c ;

[0038] Step 4: Calculate the distance d between the first vibration signal receiver 2, i.e., the sounding point and the axis of the buried pipeline 1;

[0039] Step 5: Move to the next sounding point and test the distance d between the next sounding point and the axis of the buried pipeline 1, until the distance d between all sounding points on the ground and the axis of the buried pipeline 1 is obtained.

[0040] In some embodiments, the formula for calculating the distance d between the first vibration signal receiver 2, i.e., the sounding point, and the axis of the buried pipeline 1 is as follows:

[0041] In some embodiments, the distance d between each sounding point and the axis of the buried pipeline 1 is obtained by multiple measurements to remove large fluctuations in data, and finally obtains an accurate burial depth value.

[0042] The principle of this invention is as follows:

[0043] As shown in Figure 2, A, B, and C are the locations of the first vibration signal receiver 2, the second vibration signal receiver 3, and the third vibration signal receiver 4, respectively, and O is the axial position of the buried pipeline 1.

[0044] Let d be the distance OA between the sounding point and the axis of the buried pipeline 1, and let t be the time t required for the acoustic signal to travel from O to A. a The product of the sound wave signal propagation speed v is...

[0045] The ratio of OB to OA is

[0046] The ratio of OC to OA is

[0047] make We obtain OB = d·λ1, OC = d·λ2;

[0048] but (m+n) 2 λ1 2 -m 2 λ2 2 =n 2 +2mn [(m+n)λ1+mλ2]·[(m+n)λ1-mλ2]=n 2 +2mn

[0049] Will After substituting, we get:

[0050] Let ∠AOB = θ, then

[0051] but

[0052] This invention innovates the algorithm, reducing the number of parameters, making the calculation simpler and more efficient, saving time, and enabling automatic real-time calculation of burial depth using mobile terminals, eliminating the need for specialized equipment and complex operations, reducing labor costs, improving overall efficiency, and saving money.

[0053] This invention improves the layout of the vibration signal receiver, allowing it to be placed arbitrarily in a large space, adapting to complex environments and offering high practicality. It requires minimal technical expertise from operators, is highly user-friendly, and can be combined with equipment from other manufacturers, making it widely applicable and highly scalable.

[0054] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An acoustic burial depth detection method for non-metallic buried pipelines; characterized in that, Includes the following steps: Step 1: Determine the projection of the buried pipeline (1) to be detected on the ground; Step 2: Determine a sounding point on the projection of the buried pipeline (1), and arrange three vibration signal receivers along a straight line along the normal of the projection of the buried pipeline (1) at the sounding point. The first vibration signal receiver (2) is located at the depth sounding point; The distance between the first vibration signal receiver (2) and the second vibration signal receiver (3) is m; The distance between the second vibration signal receiver (3) and the third vibration signal receiver (4) is n; Step 3: Continuously transmit a specific frequency signal into the buried pipeline (1) using an acoustic vibrator, and after the first vibration signal receiver (2) receives the acoustic signal, record the time difference t between the time when the second vibration signal receiver (3) receives the acoustic signal and the time when the first vibration signal receiver (2) receives the acoustic signal. b , and the time difference t between the time when the third vibration signal receiver (4) receives the sound wave signal and the time when the first vibration signal receiver (2) receives the sound wave signal. c ; Step 4: Calculate the distance d between the first vibration signal receiver (2), i.e., the sounding point and the axis of the buried pipeline (1); Step 5: Move to the next sounding point and test the distance d between the next sounding point and the axis of the buried pipeline (1) until the distance d between all sounding points on the ground and the axis of the buried pipeline (1) is obtained.

2. The acoustic burial depth detection method for non-metallic buried pipelines as described in claim 1; characterized in that, The formula for calculating the distance d between the first vibration signal receiver (2), i.e., the sounding point, and the axis of the buried pipeline (1) is as follows:

3. The acoustic burial depth detection method for non-metallic buried pipelines as described in claim 1; characterized in that, The distance d between each depth measuring point and the axis of the buried pipeline (1) is measured multiple times to remove large fluctuations and finally obtain an accurate burial depth value.

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