Tapered reducer pipe wall thickness monitoring method and system based on ultrasonic probe

Abstract

The invention provides a conical reducer pipe wall thickness monitoring method and system based on an ultrasonic probe, and belongs to the technical field of ultrasonic corrosion monitoring. Each ultrasonic probe makes contact with the outer wall of the conical reducer pipe through the corresponding metal coupling piece, and the method comprises the steps that the installation position of the ultrasonic probe is determined based on the roughness of the outer wall of the conical reducer pipe; obtaining the thickness of the metal coupling sheet corresponding to each ultrasonic probe and the roughness of the mounting position of each ultrasonic probe on the conical reducer pipe; based on the thickness of the metal coupling sheet and the roughness of the mounting position, determining the minimum contact pressure between each ultrasonic probe and the conical reducer pipe; installing the corresponding ultrasonic probe according to the minimum contact pressure between each ultrasonic probe and the conical reducer pipe; and the wall thickness of the tapered reducer pipe is monitored by using an ultrasonic probe on the tapered reducer pipe. The method has the advantages of being simple in installation and measurement method, accurate in measurement result and capable of achieving real-time monitoring.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic corrosion monitoring, and in particular to a method for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe and a system for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe. Background Art

[0002] In the petroleum industry, tapered reducers are widely used. Such pipes are easily thinned due to long-term scouring and corrosion. Once the operating pipe fails, the internal medium leaks or explodes, which will cause immeasurable consequences. Therefore, in order to ensure the continuous and long-term safe operation of the operating pipeline, the wall thickness of the operating pipeline needs to be measured regularly. At present, the traditional manual detection method cannot continuously reflect the changes in the wall thickness of the operating pipeline. To address this problem, some studies have proposed a remote online monitoring technology for pipeline corrosion based on dry-coupled piezoelectric ultrasonic technology. However, this technology is proposed for equal-diameter pipelines and is not suitable for tapered reducer pipelines.

[0003] Since the monitored surface of the tapered reducer is different from the surface of the equal-diameter pipe, it is difficult to install the piezoelectric ultrasonic probe, resulting in low accuracy of the monitoring results. Furthermore, the high temperature environment of the tapered reducer pipe also poses a huge challenge to monitoring. The problem of low signal-to-noise ratio of ultrasonic signals caused by high temperature environment, ultrasonic probe, surface roughness and other reasons also needs to be solved urgently. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a method and system for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe, so as to at least solve the problem that the piezoelectric ultrasonic probe is difficult to install on the tapered reducer because the monitored surface is not like the surface of a pipe of equal diameter, resulting in low accuracy of the monitoring result; and the problem that the signal-to-noise ratio of the collected ultrasonic signal is low under special environments.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe, wherein each ultrasonic probe is coupled to the outer wall of the tapered reducer through a corresponding metal coupling sheet, and the method comprises: Based on the roughness of the outer wall of the tapered reducer, determine the installation position of the ultrasonic probe; Obtaining the thickness of the metal coupling sheet corresponding to each ultrasonic probe and the roughness of the installation position of each ultrasonic probe on the tapered reducer; Determining the minimum contact pressure between each ultrasonic probe and the tapered reducer based on the thickness of the metal coupling sheet and the roughness of the installation position; According to the minimum contact pressure between each ultrasonic probe and the tapered reducer, the corresponding ultrasonic probe is installed; The ultrasonic probe on the tapered reducer is used to monitor the wall thickness of the tapered reducer.

[0006] Optionally, based on the roughness of the outer wall of the tapered reducer, determining the installable position of the ultrasonic probe includes: Obtain the roughness of different positions of the outer wall of the tapered reducer; The position where the roughness is less than a set threshold is determined as a position where the ultrasonic probe can be installed.

[0007] Optionally, the metal coupling sheet is silver and has a thickness of 0.05-5 mm.

[0008] Optionally, determining the minimum contact pressure between each ultrasonic probe and the tapered reducer based on the thickness of the metal coupling sheet and the roughness of the tapered reducer comprises: The minimum contact pressure between the ultrasonic probe and the tapered reducer is calculated using the following formula:

[0009] in, is the minimum contact pressure between the ultrasonic probe and the tapered reducer; is the correction factor of roughness; is a constant, and >1; is the roughness; is the probe reference pressure; is the thickness of the metal coupling sheet; is the correction factor for the probe pressure.

[0010] Optionally, before installing the corresponding ultrasonic probe according to the minimum contact pressure between each ultrasonic probe and the tapered reducer, the method further includes: The ultrasonic probe is supported by a supporting mechanism to prevent the ultrasonic probe from being displaced.

[0011] Optionally, the supporting mechanism includes: A clamp, sleeved on the outer wall of the tapered reducer; A plurality of telescopic rods, one end of each of which is connected to the clamp and is used to support the clamp so that the clamp is pressed against the outer wall of the tapered reducer.

[0012] A second aspect of the present invention provides a tapered reducer wall thickness monitoring system based on an ultrasonic probe, which is applicable to the above-mentioned tapered reducer wall thickness monitoring method based on an ultrasonic probe, and the system comprises: Multiple monitoring components, each monitoring component includes: a mounting seat, the mounting seat is used to mount the ultrasonic probe, the mounting seat is relatively provided with a universal joint, each universal joint is connected to a chain, the chains in the monitoring component are sequentially connected end to end to form a monitoring chain, the monitoring chain is sleeved on the outer wall of the tapered reducer, and the contact pressure between the ultrasonic probe and the tapered reducer is adjusted by adjusting the tension of the chain; A plurality of metal coupling pieces, each ultrasonic probe is coupled and contacted with the outer wall of the tapered reducer through a metal coupling piece; A processor connected to the ultrasonic probe, for obtaining the wall thickness of the tapered reducer based on the ultrasonic signal obtained from each ultrasonic probe Optionally, the processor is further configured to: determining a signal-to-noise ratio of each ultrasonic signal; If the signal-to-noise ratio is greater than or equal to a preset threshold, the wall thickness of the tapered reducer is determined using a peak value method based on the ultrasonic signal; If the signal-to-noise ratio is less than a preset threshold, the ultrasonic signal is filtered, and based on the filtered ultrasonic signal, the wall thickness of the tapered reducer is determined using a peak value method.

[0013] Optionally, the ultrasonic signal is filtered using a Butterworth high-pass filtering method to obtain a filtered ultrasonic signal.

[0014] Optionally, the ultrasonic signal is filtered using the following formula:

[0015]

[0016]

[0017] in, is the filtered ultrasonic signal; is the collected ultrasonic signal; is the inverse Fourier transform; is Fourier transform; is the transfer function; is the cut-off frequency; N is the order of the filter; for To the origin of the Fourier domain distance.

[0018] This technical solution screens out the optimal installable position of the ultrasonic probe and accurately determines the installation position of the ultrasonic probe. In addition, the ultrasonic probe is coupled to the outer wall of the tapered reducer through a metal coupling sheet. Based on the roughness of the installation position and the thickness of the metal coupling sheet, the minimum contact pressure between the ultrasonic probe and the tapered reducer is determined to achieve precise installation coupling. This technical solution has the advantages of simple installation and measurement methods, accurate measurement results, and the ability to achieve real-time monitoring.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a flow chart of a method for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe provided by the present invention; Figure 2 It is a structural schematic diagram of the support mechanism provided by the present invention; Figure 3 It is a structural schematic diagram of a tapered reducer pipe wall thickness monitoring system based on an ultrasonic probe provided by the present invention; Figure 4 It is a partial structural schematic diagram of the monitoring chain provided by the present invention; Figure 5 It is a front view of the connection between the monitoring chain provided by the present invention and the tapered reducer; Figure 6 It is a cross-sectional top view of the connection between the monitoring chain provided by the present invention and the tapered reducer; Figure 7 It is a data flow block diagram of the processor provided by the present invention; Figure 8 is a schematic diagram of the original waveform of the first ultrasonic signal provided by the present invention; Fig. 9 is a schematic diagram of the original waveform of the second ultrasonic signal provided by the present invention; Fig.10 It is a waveform diagram of the second ultrasonic signal provided by the present invention after filtering.

[0021] Description of Reference Numerals 1-support mechanism; 2-monitoring component; 3-ultrasonic probe; 4-metal coupling piece; 5-processor; 10-conical reducer; 11-clamp; 12-telescopic rod; 21-mounting seat; 22-universal joint; 23-chain. DETAILED DESCRIPTION

[0022] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0023] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0024] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0025] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Figure 1 It is a flow chart of a method for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe provided by the present invention; Figure 2 It is a structural schematic diagram of the support mechanism provided by the present invention; Figure 3It is a structural schematic diagram of a tapered reducer pipe wall thickness monitoring system based on an ultrasonic probe provided by the present invention; Figure 4 It is a partial structural schematic diagram of the monitoring chain provided by the present invention; Figure 5 It is a front view of the connection between the monitoring chain provided by the present invention and the tapered reducer; Figure 6 It is a cross-sectional top view of the connection between the monitoring chain provided by the present invention and the tapered reducer; Figure 7 It is a data flow block diagram of the processor provided by the present invention; Figure 8 is a schematic diagram of the original waveform of the first ultrasonic signal provided by the present invention; Fig. 9 is a schematic diagram of the original waveform of the second ultrasonic signal provided by the present invention; Fig.10 It is a waveform diagram of the second ultrasonic signal provided by the present invention after filtering.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe, wherein each ultrasonic probe is coupled to the outer wall of the tapered reducer through a corresponding metal coupling sheet, and the method comprises: Step 1: Determine the installation position of the ultrasonic probe based on the roughness of the outer wall of the tapered reducer; Specifically, in this embodiment, since the roughness of different positions on the outer wall of the tapered reducer is different, the monitoring effect at different positions is also different. If the contact surface between the ultrasonic probe and the outer wall of the tapered reducer is too rough, the ultrasonic signal cannot be reflected, so it is impossible to achieve online monitoring of the wall thickness. Therefore, in this embodiment, the roughness Ra of the contact surface of the monitored workpiece is measured by a roughness detector, and the position where the roughness Ra is less than 12 can be determined as the installable area where the ultrasonic probe can be installed, thereby ensuring the accuracy of monitoring. Specifically, in actual operation, the installable position is determined in the installable area according to the preset spacing required for detection, and marked so that the ultrasonic probe can be installed and fixed later.

[0030] Step 2: obtaining the thickness of the metal coupling sheet corresponding to each ultrasonic probe and the roughness of the installation position of each ultrasonic probe on the tapered reducer; Step 3: determining the minimum contact pressure between each ultrasonic probe and the tapered reducer based on the thickness of the metal coupling sheet and the roughness of the installation position; Specifically, in this embodiment, the minimum contact pressure between the ultrasonic probe and the tapered reducer is calculated using the following calculation formula:

[0031] in, is the minimum contact pressure between the ultrasonic probe and the tapered reducer; is the correction factor of roughness; is a constant, and >1; is the roughness; is the probe reference pressure; is the thickness of the metal coupling sheet; is the correction factor for the probe pressure.

[0032] The minimum contact pressure between the ultrasonic probe and the tapered reducer obtained by the above calculation is accurate. Installing and fixing the ultrasonic probe according to the minimum contact pressure can ensure the coupling effect of the contact surface, further ensure the accuracy of data collection, and improve the monitoring effect.

[0033] Step 4: Install the corresponding ultrasonic probe according to the minimum contact pressure between each ultrasonic probe and the tapered reducer; In this embodiment, each ultrasonic probe may be installed independently on the tapered reducer.

[0034] Step 5: Use the ultrasonic probe on the tapered reducer to monitor the wall thickness of the tapered reducer.

[0035] Specifically, ultrasonic thickness measurement can be performed after the high-temperature probe is installed. To obtain the wall thickness of the monitored workpiece, the collected ultrasonic signal needs to be analyzed and processed. The wall thickness of the monitored workpiece can be calculated by measuring the time it takes for the ultrasonic wave to travel back and forth to the monitored workpiece and the wave velocity of the ultrasonic wave in the monitored workpiece. The signal-to-noise ratio of the ultrasonic signal is crucial to the accuracy of extracting the time it takes for the ultrasonic wave to travel back and forth to the monitored workpiece. When the signal-to-noise ratio is low, the accurate time cannot be extracted, so the ultrasonic signal needs to be processed.

[0036] Furthermore, in this embodiment, the metal coupling sheet is made of silver and has a thickness of 0.05-5 mm, which can achieve a good coupling effect; in addition, metals such as copper and gold can also be used.

[0037] More specifically, the roughness Ram of the contact surface of the monitored workpiece is measured by a roughness detector, the thickness of the silver sheet is τ, and the i The vertical pressure of the probe is , in this case the signal-to-noise ratio of the ultrasonic waveform The vertical pressure is The relationship between them is as follows:

[0038]

[0039] (1) When the silver sheet thickness τ≤ε0, the silver sheet is too thin to achieve coupling, resulting in the ultrasonic signal being unable to enter the monitored workpiece. Therefore, online monitoring of the wall thickness cannot be achieved.

[0040] (2) When the silver sheet thickness τ>ε1, the ultrasonic signal cannot be effectively extracted because the coupling layer is too thick, so online monitoring of the wall thickness cannot be achieved.

[0041] (3) When the thickness of the silver sheet ε0<τ≤ε1, the contact surface roughness Ram>Ram0. Due to the rough contact surface, the ultrasonic signal cannot be reflected, so online monitoring of the wall thickness cannot be achieved.

[0042] (4) When the thickness of the silver sheet ε0<τ≤ε1 and the roughness of the contact surface Ram≤Ram0, the thickness of the silver sheet is moderate and the roughness of the contact surface is appropriate. The ultrasonic signal can enter the monitored workpiece through the coupling silver sheet, and online monitoring of the wall thickness can be realized.

[0043] In another embodiment, if Figure 2 As shown, before installing the corresponding ultrasonic probe according to the minimum contact pressure between each ultrasonic probe and the tapered reducer, the method further includes: Due to the smoothness of the conical surface and the large and small heads, when pre-tightening the sonic probe, if the designed ultrasonic probe is directly installed on the monitored conical surface, the ultrasonic probe will slide in the direction of the small head during pre-tightening, causing its position to deviate and unable to be installed in the predetermined position. Therefore, it is necessary to apply a supporting force in the direction of the small head-large head of the conical reducer to the ultrasonic probe to prevent the ultrasonic probe from sliding in the direction of the small head. In view of this problem, an installation auxiliary support mechanism 1 is designed. The support mechanism 1 consists of two parts: a clamp 11 of an annular structure, which can achieve a certain diameter change adjustment by rotating the screw, and a plurality of telescopic rods 12. The clamp is installed on a straight pipe section connected to the conical reducer pipe. The telescopic rod 12 is fixed to the clamp 11 by bolts, providing a supporting force in the direction of the small head-large head to the ultrasonic probe. The length of the telescopic rod 12 can be adjusted and customized according to the installation position. More specifically, the telescopic rod 12 can be an electric or hydraulic telescopic rod, or a mechanical telescopic rod connected by a thread, and the telescopic amount can be adjusted by rotation.

[0044] By adopting the above solution and using the support mechanism 1 to support the ultrasonic probe, it is possible to effectively prevent the ultrasonic probe from being displaced due to gravity, resulting in a change in the detection position and making the monitoring result inaccurate.

[0045] like Figure 3-6 As shown, an embodiment of the present invention provides a tapered reducer wall thickness monitoring system based on an ultrasonic probe, which is applicable to the above-mentioned tapered reducer wall thickness monitoring method based on an ultrasonic probe, and the system includes: A plurality of monitoring components 2, each monitoring component 2 comprising: a mounting seat 21, the mounting seat 21 is used to mount the ultrasonic probe 3, a universal joint 22 is relatively arranged on the mounting seat 21, each universal joint 22 is connected to a chain 23, the chains 23 in the monitoring components 2 are sequentially connected end to end to form a monitoring chain, the monitoring chain is sleeved on the outer wall of the tapered reducer 10, and the contact pressure between the ultrasonic probe 2 and the tapered reducer 10 is adjusted by adjusting the tension of the chain 23; A plurality of metal coupling pieces 4, each ultrasonic probe 3 is coupled and contacted with the outer wall of the tapered reducer 10 through a metal coupling piece 4; The processor 5 is connected to the ultrasonic probe 3 and is used to obtain the wall thickness of the tapered reducer 10 based on the ultrasonic signal.

[0046] Specifically, during installation, due to the smoothness of the conical surface and the large and small heads, when pre-tightening the chain, if the designed monitoring chain is directly installed on the monitored conical surface, the chain will slide toward the small end when pre-tightening the monitoring chain, resulting in the monitoring chain being unable to be installed in the predetermined position. Therefore, it is necessary to apply a supporting force in the direction of the small end-large end of the conical reducer to the monitoring chain to prevent the chain tooling from sliding toward the small end. In response to this problem, an installation auxiliary support mechanism is designed. The support mechanism 1 consists of two parts: a clamp 11 and a telescopic rod 12. The clamp 11 is installed on a straight pipe section connected to the conical reducer pipe 10. The telescopic rod 12 is fixed to the clamp with bolts to provide a supporting force in the direction of the small end-large end to the monitoring chain. The length of the telescopic rod 12 can be adjusted and customized according to the installation position, which is carried out by the aforementioned support mechanism 1.

[0047] In addition, in this embodiment, the connection between the mounting seat 21 and the chain 23 is connected by a universal joint 22, and the universal joint 22 is used to connect the mounting seat 21 so that the tension T The direction of the chain 23 and the mounting seat 21 can be changed with the installation position of the chain 23 and the mounting seat 21, so that the mounting seat 21 is tightly fitted with the surface of the tapered reducer 10; if the universal joint 22 is not used for connection, and the chain 23 is directly connected to the mounting seat 21, the width of the chain 23 is large, and the influence of the width of the chain 23 on the force of the mounting seat 21 cannot be ignored, and the tension on the mounting seat 21 T In two directions, when the chain 23 is pre-tightened, at most only one ultrasonic probe mounting seat 21 is in contact with the conical surface of the conical reducer 10, resulting in poor coupling between the ultrasonic probe and the conical surface, and failure to implement online monitoring. The chain 23 is a roller chain.

[0048] More specifically, the mounting base 21 of the probe is embedded between the chains 23, and the circumference of a chain 23 can be connected according to the needs. nAfter installing the preload chain 23, assemble the ultrasonic probe 3 and the probe fixture, and then install them on the mounting base 21 with bolts. Treat the ultrasonic probe 3, the probe fixture, and the probe mounting base as a whole and perform a force analysis on them. i When there are 1 probe, the supporting force applied by the conical surface to the whole is , the gravity is , the vertical pressure on the probe is ,have , the tension applied by the chain to the whole is , is the angle between the supporting force and the chain pulling force direction, When the surface roughness is Ram and the thickness of the silver sheet is τ, the minimum vertical pressure required for the probe installation is ,due .

[0049] ; ;...; ;

[0050] As the number of high temperature probes installed on the same monitoring chain increases, , ,in, .because ,exist When , it increases monotonically, so It can be seen that, using this installation method, the more high-temperature probes are installed, the greater the vertical pressure of the high-temperature probes, and the better the installation coupling effect.

[0051] Furthermore, the processor 5 is also used for: For each ultrasonic probe, the ultrasonic signal is collected: Determine the signal-to-noise ratio of the ultrasonic signal; If the signal-to-noise ratio is greater than or equal to a preset threshold, the wall thickness of the tapered reducer is determined using a peak value method based on the ultrasonic signal; If the signal-to-noise ratio is less than a preset threshold, the ultrasonic signal is filtered, and based on the filtered ultrasonic signal, the wall thickness of the tapered reducer is determined using a peak value method.

[0052] Specifically, Figure 7 As shown, in the present embodiment, after acquiring the ultrasonic signal, it is first determined whether the signal-to-noise ratio of the ultrasonic signal is greater than or equal to a preset threshold value. If so, the wall thickness of the tapered reducer is determined directly based on the ultrasonic signal using the peak method; if not, the ultrasonic signal is first filtered to obtain a filtered ultrasonic signal, and then the wall thickness of the tapered reducer is determined based on the filtered ultrasonic signal using the peak method. Figure 8-Figure 10 is a waveform diagram of ultrasonic signal. Figure 8 The signal-to-noise ratio of the ultrasonic signal is high, so no filtering is required; Fig. 9 The signal-to-noise ratio of the ultrasonic signal is relatively low, so filtering is required. The waveform diagram after processing is as follows: Fig.10 As shown, the signal-to-noise ratio is high.

[0053] Furthermore, the ultrasonic signal is filtered using a Butterworth high-pass filtering method to obtain a filtered ultrasonic signal.

[0054] The Butterworth high-pass filtering method is used for ultrasonic signals to pass the specific frequency of the ultrasonic wave and effectively suppress the signals of other frequencies, so that the maximum flat amplitude characteristics can be obtained within the passband, making the transition between low frequency and high frequency smooth; the ultrasonic signal after Butterworth bandpass filtering is subjected to zero-phase digital filtering to remove the serious drift and interference of various frequencies in the signal waveform, and extract the frequency components of interest. Zero-phase digital filtering is a zero-phase digital filtering method without time delay, which ensures that the phase difference between the input and output signals is zero, thereby obtaining an ideal ultrasonic signal. The zero-phase digital filtering method is to filter the input signal sequentially first, that is, the first filtering; after mirroring the result, the result is filtered through the same filter again as the second filtering, and the result is output after mirroring, so that an accurate zero-phase distortion output can be obtained. For g(x,y) after signal processing, the peak method is used to measure the wall thickness.

[0055] Furthermore, the ultrasonic signal is filtered using the following formula:

[0056]

[0057]

[0058] in, is the filtered ultrasonic signal; is the collected ultrasonic signal; is the inverse Fourier transform; is Fourier transform; is the transfer function; is the cut-off frequency; N is the order of the filter; for To the origin of the Fourier domain distance.

[0059] By adopting the above-mentioned method, after judging the signal-to-noise ratio first, determining whether to perform filtering processing, the amount of data processing can be reduced while ensuring the accuracy of the data.

[0060] Those skilled in the art will understand that all or part of the steps in the method for implementing the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0061] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.

[0062] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0063] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe, characterized in that: Each ultrasonic probe is coupled and contacted with the outer wall of the tapered reducer through a corresponding metal coupling sheet, and the method comprises: Based on the roughness of the outer wall of the tapered reducer, determine the installation position of the ultrasonic probe; Obtaining the thickness of the metal coupling sheet corresponding to each ultrasonic probe and the roughness of the installation position of each ultrasonic probe on the tapered reducer; Determining the minimum contact pressure between each ultrasonic probe and the tapered reducer based on the thickness of the metal coupling sheet and the roughness of the installation position; According to the minimum contact pressure between each ultrasonic probe and the tapered reducer, the corresponding ultrasonic probe is installed; The ultrasonic probe on the tapered reducer is used to monitor the wall thickness of the tapered reducer.

2. The method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe according to claim 1, characterized in that: Based on the roughness of the outer wall of the tapered reducer, determine the possible installation positions of the ultrasonic probe, including: Obtain the roughness of different positions of the outer wall of the tapered reducer; The position where the roughness is less than a set threshold is determined as the installation position of the ultrasonic probe.

3. The method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe according to claim 1, characterized in that: The metal coupling sheet is made of silver and has a thickness of 0.05-5 mm.

4. The method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe according to claim 1, characterized in that: Based on the thickness of the metal coupling sheet and the roughness of the installation position, determining the minimum contact pressure between each ultrasonic probe and the tapered reducer comprises: The minimum contact pressure between the ultrasonic probe and the tapered reducer is calculated using the following formula: in, is the minimum contact pressure between the ultrasonic probe and the tapered reducer; is the correction factor of roughness; is a constant, and >1; is the roughness; is the probe reference pressure; is the thickness of the metal coupling sheet; is the correction factor for the probe pressure.

5. The method for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe according to claim 1, characterized in that: Before installing the corresponding ultrasonic probe according to the minimum contact pressure between each ultrasonic probe and the tapered reducer, the method further includes: The ultrasonic probe is supported by a support mechanism (1) to prevent the ultrasonic probe from being displaced.

6. The method for monitoring the wall thickness of a tapered reducer pipe based on an ultrasonic probe according to claim 5, characterized in that: The supporting mechanism (1) comprises: A clamp (11) sleeved on the outer wall of the tapered reducer (10); A plurality of telescopic rods (12), one end of each of the telescopic rods (12) being connected to the clamp (11) and used to support the clamp (11) so that the clamp (11) is pressed against the outer wall of the tapered reducer (10).

7. A system for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe, applicable to the method for monitoring the wall thickness of a tapered reducer based on an ultrasonic probe as claimed in any one of claims 1 to 6, characterized in that: The system comprises: A plurality of monitoring components (2), each monitoring component (2) comprising: a mounting seat (21), the mounting seat (21) being used to mount an ultrasonic probe (3), a universal joint (22) being arranged on the mounting seat (21) in a relative manner, each universal joint (22) being connected to a chain (23), the chains (23) in the monitoring components (2) being connected end to end in sequence to form a monitoring chain, the monitoring chain being sleeved on the outer wall of a tapered reducer (10), and the contact pressure between the ultrasonic probe (2) and the tapered reducer (10) being adjusted by adjusting the tension of the chain (23); A plurality of metal coupling sheets (4), each ultrasonic probe (3) being coupled and contacted with the outer wall of the tapered reducer tube (10) via a metal coupling sheet (4); A processor (5) is connected to the ultrasonic probe (3) and is used to obtain the wall thickness of the tapered reducer (10) based on the ultrasonic signal obtained from each ultrasonic probe (3).

8. The tapered reducer wall thickness monitoring system based on ultrasonic probe according to claim 7 is characterized in that: The processor (5) is further configured to: determining a signal-to-noise ratio of each ultrasonic signal; If the signal-to-noise ratio is greater than or equal to a preset threshold, the wall thickness of the tapered reducer is determined using a peak value method based on the ultrasonic signal; If the signal-to-noise ratio is less than a preset threshold, the ultrasonic signal is filtered, and based on the filtered ultrasonic signal, the wall thickness of the tapered reducer is determined using a peak value method.

9. The tapered reducer wall thickness monitoring system based on ultrasonic probe according to claim 8, characterized in that: The ultrasonic signal is filtered by using the Butterworth high-pass filtering method to obtain a filtered ultrasonic signal.

10. The tapered reducer wall thickness monitoring system based on ultrasonic probe according to claim 8, characterized in that: The ultrasonic signal is filtered using the following formula: in, is the filtered ultrasonic signal; is the collected ultrasonic signal; is the inverse Fourier transform; is Fourier transform; is the transfer function; is the cut-off frequency; N is the order of the filter; for To the origin of the Fourier domain distance.

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