CN116026921A - An intelligent grouting sleeve system with a built-in annular ultrasonic sensor array - Google Patents

Abstract

The invention provides an intelligent grouting sleeve system with a built-in annular ultrasonic sensor array, which belongs to the technical field of grouting sleeves and comprises an internal sensing unit, an excitation display unit, a calculation unit and a signal transmission unit. The intelligent grouting sleeve device based on ultrasonic detection has the characteristics of being green, efficient, safe, low in cost and long in service life, is not limited by time surrounding environment, improves the traditional ultrasonic nondestructive detection mode, has more accurate detection capability and stronger adaptability to environmental changes, can excite different types of ultrasonic signals by an ultrasonic excitation and oscilloscope system, can perform richer data comparison with a result obtained by a calculation unit, and has different resolutions for detecting different materials, material shapes, detection environments and the like so as to realize analysis diversity.

Description

An intelligent grouting sleeve system with a built-in annular ultrasonic sensor array

technical field

The invention relates to the technical field of grouting sleeves, in particular to an intelligent grouting sleeve system with a built-in annular ultrasonic sensor array.

Background technique

For grouting sleeves connecting prefabricated concrete components, various defects will inevitably occur inside the sleeves during on-site grouting. Detection and evaluation of grouting sleeve defects is an urgent problem that needs to be solved, which directly affects the joints of prefabricated buildings and even the entire building. stability and safety of the building. In the on-site construction of prefabricated buildings, manual errors, grouting backflow, air leakage, etc. during grouting using non-shrinking high-strength grouting materials will cause many types of defects inside the sleeve, such as concentrated defects, dispersed defects, inclined sides Defects and more. When the defect rate reaches more than 20%, these defects will seriously weaken the mechanical properties of the grouting sleeve, resulting in a decrease in the bearing capacity of the building joints. Therefore, it is very necessary to detect and evaluate the damage degree of the internal defects of the sleeve, especially in the building After fires, earthquakes, and reaching a certain service life, the high temperature will make the grouting material brittle and the steel sleeve will soften, and after the earthquake and a certain service life, there will be tiny cracks in the grouting material. If it is not replaced in time, it will seriously affect the building. Use even produces very big potential safety hazard. However, the existing detection and evaluation methods include X-ray detection, eddy current detection, CT three-dimensional scanning, etc., and there are still many problems, such as X-ray detection operation is complicated and the equipment is expensive. More importantly, the radiation residue produced has adverse effects on the human body and subsequent use. , eddy current detection can only act on conductive metal materials, and the internal defects in the grouting sleeve and concrete cannot be measured by eddy current technology. Although the accuracy and detection accuracy of CT three-dimensional scanning can be guaranteed, but Its equipment cost and professional operation labor cost are expensive, and more importantly, it cannot realize rapid on-site detection, which greatly weakens its applicability. Although the above methods have their own advantages, none of them can realize rapid on-site quantification of sleeve defects and evaluation of sleeve status.

Contents of the invention

The purpose of the present invention is to provide an intelligent grouting sleeve system with a built-in annular ultrasonic sensor array to solve the technical problem of rapid identification and evaluation of various types of defects inside the existing grouting sleeve.

The purpose of the invention and development of the intelligent grouting sleeve based on more than acoustic wave detection is to start from the root, and realize the self-sensing ability of the sleeve by combining the sensor technology with the existing sleeve, so as to endow the sleeve with wisdom. The formed intelligent sleeve can effectively replace other uneconomical and impractical detection methods without increasing the cost, and solve the defects of different positions and shapes that may occur inside the sleeve, and finally achieve the evaluation of its defects Whether it has a significant impact on the mechanical properties of the connecting parts, to achieve fast, efficient and accurate state judgment on site.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

An intelligent grouting sleeve system with a built-in annular ultrasonic sensor array, including an internal perception unit, an excitation display unit, a calculation unit and a signal transmission unit, the excitation display unit is connected to the internal perception unit through the signal transmission unit, and the calculation unit is connected to the excitation display unit Connection, the internal perception unit is used to perceive the internal structure signal in real time and transmit it to the excitation display unit for display through the signal transmission unit, and finally transmit it to the calculation unit for calculation.

The internal sensing unit of the grouting sleeve includes the bottom beam, the shear wall and the grouting sleeve, the grouting sleeve is set inside the shear wall, the mortar sealing joint is set at the connection between the bottom beam and the shear wall, and the grouting sleeve is connected to the bottom beam .

The grouting sleeve signal transmission unit is composed of a shunt, an ultrasonic signal transmission line and a universal port, wherein the universal port can match the ultrasonic signal transmission line.

Further, the calculation unit is composed of a host computer and a display. The host computer can run an intelligent algorithm to calculate ultrasonic data. The intelligent algorithm is used to automatically extract ultrasonic related data, filter the ultrasonic wave, and calculate the data of arrival time, first wave energy and entropy. The calculation of ultrasonic arrival time is extracted by the cycle of the threshold method. The energy of the first wave is obtained by calculating the area of the envelope of the first wave of the received signal. The calculation of entropy is based on the probability density statistics method of Shannon entropy to obtain a value to represent the signal. Entropy, which compares the time, first wave energy, and entropy data to that of a complete, defect-free sleeve.

Furthermore, the excitation display unit is composed of an arbitrary waveform exciter and an ultrasonic oscilloscope, wherein the arbitrary waveform generator is equipped with high-frequency and low-frequency signal excitation interfaces to detect the required excitation frequency.

Further, the grouting sleeve includes a sleeve housing, a grouting port and a sensor array, the inside of the sleeve housing is set as a hollow structure, the grouting port is provided on the side of the sleeve housing, and the sensor array is attached to the sleeve housing outside.

Further, the sensor array includes four groups of sensors, each group of sensors is composed of four piezoelectric ceramic disc sensors, the first group of sensors is responsible for detecting concentrated defects on the horizontal pipe wall, the second group of sensors is responsible for detecting oblique horizontal defects, the first Both the first group of sensors and the second group of sensors use linear ultrasonic waves, the third and second group of sensors and the fourth group of second group of sensors are responsible for the use of nonlinear ultrasonic detection, and the resolution of nonlinear ultrasonic waves is higher than that of linear ultrasonic waves.

Further, the linear ultrasonic detection process is as follows: the first group of sensors includes an exciter and a receiver, both of which are piezoelectric ceramic sensors, and the exciter excites the piezoelectric chip through a high-frequency pulse to convert electrical energy into acoustic energy, Finally, the ultrasonic wave passes through the sleeve and internal defects to change the amplitude and phase of the ultrasonic signal. The amplitude and phase change is reflected by the excitation and received ultrasonic waveform, and the material defect is detected by measuring the attenuation, wave velocity or resonance frequency of the wave. Excitation in linear ultrasonic testing The peak frequency of the piezoelectric ceramic sensor used by the transmitter and the receiver needs to be the same. The arrival time of the signal, the energy ratio of the first wave, and the information entropy are all calculated by the compiled intelligent algorithm. Two ultrasonic detection paths are set on a cross section. , one has passed through the defect, and the other has not passed through the defect. These two paths are set to compare the data of the intelligent algorithm to effectively evaluate the internal defects.

Furthermore, the nonlinear ultrasonic detection process is as follows: the ultrasonic signal excitation process is the same as that of the linear ultrasonic wave, and two path detections are also set up. The difference is that the peak frequencies of the two sensors used by the nonlinear ultrasonic wave must be twice the relationship. Microscopic defects of wavelength are very sensitive. The second harmonic generation method is a kind of nonlinear ultrasonic testing. The second harmonic is generated based on the second harmonic frequency component related to the nonlinear elasticity of the material. The non-uniformity of the microstructure Inducing nonlinear elasticity, the inhomogeneity of the material can be quantified by the acoustic nonlinearity parameter β, calculated using the fundamental and second harmonic amplitudes:

Acoustic nonlinear parameters of the second harmonic to characterize the nonlinearity:

In the formula, A1 is the fundamental wave voltage amplitude; A2 is the second harmonic voltage amplitude, x is the propagation distance, and k is the wave number.

Further, the outer side of the sensor array is provided with a polyethylene adhesive layer, and the polyethylene adhesive layer is wrapped on the outer side of the sensor array and the sleeve housing. The sensor array includes several groups of defect detection sensors, and each group of defect detection sensors is arranged at intervals. The group defect detection sensor includes an exciter and a receiver, and the exciter and the receiver are arranged relatively;

The grouting port includes a grouting inlet and a grouting outlet, the grouting inlet and the grouting outlet are respectively arranged at both ends of the sleeve shell, and are arranged on the same side, the two ends of the sleeve shell are provided with connecting threaded ports, the sleeve shell The interior is provided with a central steel bar.

The present invention has the following beneficial effects due to the adoption of the above technical solution:

The intelligent grouting sleeve device based on ultrasonic detection proposed by the present invention has the characteristics of green, high efficiency, safety, low cost and long service life, and is not limited by time and surrounding environment. Improvement, so that it has more accurate detection capabilities and stronger adaptability to environmental changes. In addition, the ultrasonic excitation and oscilloscope system can excite different types of ultrasonic signals, and the results obtained by the calculation unit can be compared with richer data. Different types of waveforms have different resolutions for the detection of different materials, material shapes, detection environments, etc., so as to achieve the diversity of analysis. The combination of piezoelectric ceramic sensors and grouting sleeves is applied to actual projects, so as to play a role in monitoring. Function, the application of ultrasonic testing to the grouting sleeve connected to the joint of the prefabricated building realizes the detection of internal defects of the grouting sleeve, which can effectively evaluate the safety of the building joint and make the structure more reliable.

Description of drawings

Fig. 1 is a schematic structural diagram of the system of the present invention;

Fig. 2 is a cross-sectional view of the sleeve of the present invention;

Fig. 3 is the horizontal bubble noodle diagram of sleeve of the present invention;

Fig. 4 is a 3-3 sectional view of Fig. 3;

Fig. 5 is a perspective view of the sleeve of the present invention;

Fig. 6 is a real sequence diagram of nonlinear ultrasonic detection in the present invention.

In the drawings, A-internal perception unit, B-excitation display unit, C-calculation unit, D-signal transmission unit, 1-sleeve shell, 2-grouting port, 3-stimulator, 4-receiver, 5 -Ultrasonic signal, 6-sensor array, 7-polyethylene glue layer, 8-central steel bar, 9-defect, 10-connecting screw hole, 11-bottom beam, 12-shear wall, 13-transmission line reserved pipe, 14 - Mortar-sealed joints, 15 - waveform exciter, 16 - oscilloscope.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many of the details listed in the specification are only for readers to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

As shown in Figure 1, an intelligent grouting sleeve system with a built-in annular ultrasonic sensor array includes an internal perception unit A, an excitation display unit B, a calculation unit C, and a signal transmission unit D, and the excitation display unit B passes through the signal transmission unit D It is connected with the internal perception unit A, and the calculation unit C is connected with the excitation display unit B. The internal perception unit A is used to sense the internal structure signal in real time and transmits it to the excitation display unit B for display through the signal transmission unit D, and finally transmits it to the calculation unit C performs calculations.

Based on the principle of ultrasonic testing, it is proposed that the development of an intelligent grouting sleeve based on ultrasonic testing can effectively realize the rapid identification and evaluation of various types of defects inside the sleeve. Ceramic sensor (PZT) array, and these sensors are wrapped and sealed on the surface of the sleeve with polyethylene glue, and the grouting sleeve is pre-embedded in the concrete. The sensor is connected to the professional ultrasonic equipment through the reserved pipeline. The equipment excites a certain frequency of ultrasonic signals, and the sensor can receive them, and analyze the signal's time of arrival (TOF), energy, entropy and other values to evaluate its defects. The invention aims to detect all types of defects generated inside the sleeve, and the self-inspection method is simple in operation, low in cost and green.

In the detection of grouting sleeve defects, whether it is destructive testing or non-destructive testing, ultrasonic testing is an economical and efficient way to evaluate its defects without destroying components. In concrete components, setting this kind of built-in sensor can be closer to the defect source, thereby effectively reducing the influence of other noises. For subsequent detection, the sensor line can be directly connected to the excitation device, which can effectively reduce the detection cost and improve economic benefits. . Among them, the intelligent grouting sleeve inspection is an important device for self-inspection of its internal defects and evaluation of the safety of building nodes. Ultrasonic flaw detection is a non-destructive testing method that uses the difference in acoustic properties of materials and their defects to detect the internal defects of materials based on the energy changes in the reflection of ultrasonic wave propagation and penetration time. The piezoelectric ceramic sensor converts ultrasonic signals into electrical signals for detection. , the system of the present invention is mainly composed of four groups of annular sensor arrays, wherein each group of arrays is composed of four sensors, supplemented by external professional ultrasonic detection equipment, grouting sleeves, etc., the detection process only needs to output the reserved sensor signal output port It only needs to be connected to external professional ultrasonic equipment, and the detection equipment is easy to install. The biggest difference between ultrasonic testing and other testing methods is that it can detect and evaluate internal defects efficiently and non-destructively. Several sets of spiral sensor arrays arranged on the sleeve ratio realize the detection of various types of defects and various defects. The effective detection of the location improves its detectability.

In addition, other non-destructive testing methods, the most common of which are X-ray testing, eddy current testing, and CT three-dimensional scanning, these methods have low efficiency and high cost. Although there is also a method to pre-embed the sensor inside the sleeve, due to the complexity of the inside of the sleeve, the sensor may be damaged during grouting, and the sensor is not easy to pull out the signal transmission line. Generally speaking, the installation is cumbersome and the uncertainty is high. Such methods should also not be used. Protected by polyethylene glue, the sensor on the surface of the sleeve can not only safely and effectively excite the ultrasonic signal to a certain extent, but also provide an effective coupling method for the sensor to maximize the signal-to-noise ratio.

In the embodiment of the present invention, the internal sensing unit A includes a bottom beam 11, a shear wall 12 and a grouting sleeve, the grouting sleeve is arranged inside the shear wall 12, and a mortar sealing joint is provided at the joint between the bottom beam 11 and the shear wall 12. Seam 14, the grouting sleeve is connected with the bottom beam 11.

In the embodiment of the present invention, the signal transmission unit D is composed of a shunt, an ultrasonic signal transmission line and a general port, wherein the general port can match the ultrasonic signal transmission line.

In the embodiment of the present invention, the calculation unit C is composed of a computer host and a display. The computer host can run an intelligent algorithm to calculate ultrasonic data. The intelligent algorithm is to automatically extract ultrasonic related data, filter ultrasonic waves, and calculate arrival time, first wave energy and entropy. The data, in which the calculation of the arrival time of the ultrasonic wave is extracted by the cycle of the threshold method, the energy of the first wave is obtained by calculating the area of the envelope diagram of the first wave of the received signal, and the calculation of the entropy is based on the probability density statistical method of Shannon entropy to get a value. Indicates the entropy value of the signal, and the result can be obtained by comparing the data of time, first wave energy and entropy with the data of a complete and non-defective sleeve.

In the embodiment of the present invention, the excitation display unit B is composed of an arbitrary waveform exciter and an ultrasonic oscilloscope, wherein the arbitrary waveform generator is equipped with high-frequency and low-frequency signal excitation interfaces to detect the required excitation frequency.

In the embodiment of the present invention, as shown in Figures 2-5, the grouting sleeve includes a sleeve housing 1, a grouting port 2 and a sensor array 6, the inside of the sleeve housing 1 is set as a hollow structure, and the grouting port 2 is set On the side of the casing 1 , the sensor array 6 is attached to the outside of the sleeve casing 1 . The sensor array 6 includes four groups of sensors, and each group of sensors is composed of four piezoelectric ceramic disc sensors. The first group of sensors is responsible for detecting concentrated defects on the horizontal pipe wall, the second group of sensors is responsible for detecting oblique horizontal defects, and the first group of sensors Both the sensors of the second group and the second group use linear ultrasonic waves, and the second group of sensors of the third group and the second group of sensors of the fourth group are responsible for the detection of nonlinear ultrasonic waves. The resolution of nonlinear ultrasonic waves is higher than that of linear ultrasonic waves.

The sound source generates ultrasonic waves, and when the piezoelectric ceramic sensor excites the piezoelectric wafer through high-frequency voltage pulses, the inverse piezoelectric effect occurs, converting electrical energy into acoustic energy (mechanical energy), the probe excites ultrasonic waves, and then the ultrasonic waves enter the specimen. Ultrasonic waves propagate in the workpiece and interact with the workpiece material and the defects in it, changing its direction of propagation or changing its characteristics. The changed ultrasonic waves are received by the detection equipment, and can be processed and analyzed. Based on the characteristics of the received ultrasonic waves, the workpiece itself and its interior are evaluated for defects and their characteristics.

The linear ultrasonic detection process is as follows: the first group of sensors includes an exciter and a receiver, both of which are piezoelectric ceramic sensors, and the exciter excites the piezoelectric chip through a high-frequency pulse to convert electrical energy into acoustic energy, and finally the ultrasonic wave passes through The sleeve and internal defects change the amplitude and phase of the ultrasonic signal. The amplitude and phase changes are reflected by the excitation and received ultrasonic waveforms, and the material defects are detected by measuring the attenuation, wave velocity or resonance frequency of the wave. The exciter and receiver in linear ultrasonic testing The peak frequency of the piezoelectric ceramic sensor used in the sensor needs to be the same. The arrival time of the signal, the energy ratio of the first wave, and the information entropy are all calculated by the compiled intelligent algorithm. Two ultrasonic detection paths are set on one cross section, and one passes through Defects, and the other without defects, the two paths set are compared with intelligent algorithm data to effectively evaluate internal defects.

The nonlinear ultrasonic detection process is as follows: the ultrasonic signal excitation process is the same as the linear ultrasonic wave, and two path detections are also set up. The difference is that the peak frequency of the two sensors used by the nonlinear ultrasonic wave must be twice the relationship. Defects are very sensitive. The second harmonic generation method is a kind of nonlinear ultrasonic testing. The second harmonic is generated based on the second harmonic frequency component related to the nonlinear elasticity of the material. The non-uniformity of the microstructure causes nonlinear Elasticity, the inhomogeneity of the material, can be quantified by the acoustic nonlinear parameter β, calculated using the fundamental and second harmonic amplitudes:

Acoustic nonlinear parameters of the second harmonic to characterize the nonlinearity:

In the formula, A1 is the fundamental wave voltage amplitude; A2 is the second harmonic voltage amplitude, x is the propagation distance, and k is the wave number. Fig. 6(b) shows the fundamental wave and the second harmonic in the frequency spectrum of the received signal calculated by Fast Fourier Transform (FFT). x is the propagation distance is constant (in this paper, it is the sensor distance of different paths); k is the wave number, which is controlled by the excitation signal source and is constant for each sample.

In the embodiment of the present invention, the outer side of the sensor array 6 is provided with a polyethylene adhesive layer, and the polyethylene adhesive layer is wrapped on the outer side of the sensor array 6 and the sleeve housing 1. The sensor array 6 includes several groups of defect detection sensors, and each group of defect detection sensors The sensors are arranged at intervals, and each group of defect detection sensors includes an exciter 3 and a receiver 4, and the exciter 3 and the receiver 4 are arranged oppositely.

The grouting port 2 includes a grouting inlet and a grouting outlet, the grouting inlet and the grouting outlet are respectively arranged at both ends of the sleeve housing 1, and are arranged on the same side, and the two ends of the sleeve housing 1 are provided with connecting threaded ports 10, the sleeve A central steel bar 8 is arranged inside the cylinder shell 1 .

Among them, the sensor is composed of four groups of four piezoelectric ceramic disc sensors, with a diameter of 20mm and a thickness of 2mm. As shown in Figure 2 and Figure 3, the sensor should be arranged spirally outside the sleeve wall and made of 3mm thick polyethylene. Seal it with glue, and pull out the sensor transmission line through the reserved pipe as shown in Figure 1. The peak frequencies are 600kHz and 1.2MHz, because the wave velocity of ultrasonic waves in the sleeve is roughly 4300m/s, and the wavelength that can be accommodated is 7.17 mm wavelength, so the thickness of the defect is generally half of the wavelength, and each group of ultrasonic sensors has a pair of 600kHz for linear ultrasonic detection, and a group of 600kHz and 1.2MHz sensors for nonlinear ultrasonic detection, which is considering the thickness of the defect. , the first group is responsible for detecting concentrated defects on the horizontal pipe wall, the second group is responsible for detecting oblique horizontal defects, the first two groups use linear ultrasonic, the third and fourth groups are responsible for non-linear ultrasonic detection, and the resolution of nonlinear ultrasonic is relatively linear Ultrasound is higher;

The grouting sleeve is manufactured in accordance with the specifications of "JGT398-2012 Grouting Sleeve for Rebar Connection" and "JGJ Application Technical Regulations for Reinforcement Sleeve Grouting Connection". Oblique defects distributed in stripes, this is to simulate the defects generated inside the sleeve, where the size and thickness of the defects are determined according to the excitation frequency of the sensor; 3. The signal transmission consists of a shunt, an ultrasonic signal transmission line and a general port, of which the general The port can match all kinds of ultrasonic signal transmission lines. 4. The external computing system is composed of a host computer and a display. The host computer can run an intelligent algorithm to calculate ultrasonic data. The intelligent algorithm is used to automatically extract ultrasonic related data, filter ultrasonic waves, and calculate time of arrival (TOF ), first wave energy, entropy and other data. Among them, the calculation of the ultrasonic arrival time adopts the cycle of the threshold method to extract, and the energy of the first wave is obtained by calculating the area of the envelope diagram of the first wave of the received signal by the algorithm. The calculation of entropy is based on the probability density statistics method of Shannon entropy to obtain a value to represent the entropy value of the signal. Comparing these data with the data of a complete, defect-free sleeve yields the results.

Introduction to the working mechanism: The surface of the grouting sleeve with four sets of 4 sensors in the diameter direction is buried in the shear wall and the column in advance, and the sensor line is connected to the ultrasonic exciter and oscilloscope through the reserved pipe, and the ultrasonic waveform The exciter excites a 600kHz ultrasonic signal, which is received by the same group of sensors on the opposite side and displayed on the oscilloscope. The waveform data on the oscilloscope is exported and analyzed by an intelligent algorithm, such as time of arrival (TOF), energy of the first wave, entropy, etc. These data are compared with the data of a complete and defect-free sleeve to obtain the results.

In the proposed invention, the intelligent detection of the grouting sleeve is realized by means of piezoelectric ceramic sensors arranged in a spiral distribution on the sleeve wall. This system is composed of an excitation display unit, a sensing unit, a signal transmission unit, and an external analysis and processing system The excitation display unit is composed of a waveform exciter to stimulate the signal, the sensing unit is received by the sensor receiving the signal and displayed on the oscilloscope; the external analysis and processing system unit is a computer that collects oscilloscope data, and its functions include data acquisition, calculation and analysis . The intelligent detection grouting sleeve is shown in Figure 2. Four sets of sensors are set on the surface of the sleeve wall. Each set has two sensors to stimulate and two receivers. The sensor excitation and reception are realized through each set of sensors.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (10)

1. An intelligent grouting sleeve system with a built-in annular ultrasonic sensor array is characterized in that: it includes an internal perception unit (A), an excitation display unit (B), a calculation unit (C) and a signal transmission unit (D), and the excitation The display unit (B) is connected to the internal perception unit (A) through the signal transmission unit (D), the calculation unit (C) is connected to the excitation display unit (B), and the internal perception unit (A) is used to perceive the signal of the internal structure in real time And through the signal transmission unit (D) to the excitation display unit (B) for display, and finally to the calculation unit (C) for calculation. 2. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 1, characterized in that: the internal sensing unit (A) includes a bottom beam (11), a shear wall (12) and a grouting sleeve The grouting sleeve is arranged inside the shear wall (12), the mortar sealing joint (14) is arranged at the joint between the bottom beam (11) and the shear wall (12), and the grouting sleeve is connected with the bottom beam (11). 3. The intelligent grouting sleeve system of a kind of built-in annular ultrasonic sensor array according to claim 1, is characterized in that: signal transmission unit (D) is made up of shunt, ultrasonic signal transmission line and universal port, and wherein universal port can Match the ultrasonic signal transmission line. 4. The intelligent grouting sleeve system of a kind of built-in annular ultrasonic sensor array according to claim 1, is characterized in that: calculation unit (C) is made up of computer host computer and display, computer host computer can run intelligent algorithm to calculate ultrasonic data, The intelligent algorithm is used to automatically extract ultrasonic related data, filter the ultrasonic wave, and calculate the data of arrival time, first wave energy and entropy. The area of the wave envelope diagram is obtained. The calculation of entropy is based on the probability density statistical method of Shannon entropy to obtain a value to represent the entropy value of the signal. The data of time, first wave energy and entropy are combined with the data of a complete and non-defective sleeve. The results can be obtained by comparing. 5. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 1, wherein the excitation display unit (B) is composed of an arbitrary waveform exciter and an ultrasonic oscilloscope respectively, wherein the arbitrary waveform generator Equipped with interfaces for high-frequency and low-frequency signal excitation, for detection of the desired excitation frequency. 6. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 2, characterized in that: the grouting sleeve includes a sleeve housing (1), a grouting port (2) and a sensor array (6 ), the inside of the sleeve housing (1) is set as a hollow structure, the grouting port (2) is set on the side of the sleeve housing (1), and the sensor array (6) is attached to the sleeve housing (1) outside. 7. The intelligent grouting sleeve system of a kind of built-in annular ultrasonic sensor array according to claim 6, is characterized in that: sensor array (6) comprises four groups of sensors, and each group of sensors consists of four piezoelectric ceramic disc sensors The first group of sensors is responsible for detecting concentrated defects on the horizontal pipe wall, the second group of sensors is responsible for detecting oblique horizontal defects, both the first group of sensors and the second group of sensors use linear ultrasonic waves, the third and second group of sensors and the fourth group The second group of sensors is responsible for using nonlinear ultrasonic detection, and the resolution of nonlinear ultrasonic is higher than that of linear ultrasonic. 8. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 7, characterized in that: the linear ultrasonic detection process is: the first group of sensors includes an exciter and a receiver, an exciter and a receiver Both are piezoelectric ceramic sensors. The exciter excites the piezoelectric chip through high-frequency pulses to convert electrical energy into sound energy. Finally, the ultrasonic wave passes through the sleeve and internal defects to change the amplitude and phase of the ultrasonic signal. The amplitude and phase change is transmitted through excitation and reception. Ultrasonic waveform response, detect material defects by measuring wave attenuation, wave velocity or resonance frequency, the peak frequency of the piezoelectric ceramic sensor used in the linear ultrasonic detection exciter and receiver needs to be the same, the arrival time of the signal, the energy ratio of the first wave The information entropy is calculated by the compiled intelligent algorithm. Two ultrasonic detection paths are set on a cross section. One passes through the defect and the other does not pass through the defect. The two paths set are compared with the data of the intelligent algorithm for effective evaluation. Internal defects. 9. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 8, characterized in that: the nonlinear ultrasonic detection process is: the ultrasonic signal excitation process is the same as the linear ultrasonic wave, and two paths are also set Detection, the difference is that the peak frequency of the two sensors used by the nonlinear ultrasonic wave must be twice the relationship, the nonlinear ultrasonic wave is very sensitive to sub-wavelength microscopic defects, and the second harmonic generation method is a kind of nonlinear ultrasonic detection, the second harmonic The wave is generated based on the second harmonic frequency component related to the nonlinear elasticity of the material. The inhomogeneity of the microstructure causes the nonlinear elasticity. The inhomogeneity of the material can be quantified by the acoustic nonlinear parameter β, which uses the fundamental wave and Second harmonic amplitude calculation: Acoustic nonlinear parameters of the second harmonic to characterize the nonlinearity:

In the formula, A1 is the fundamental wave voltage amplitude; A2 is the second harmonic voltage amplitude, x is the propagation distance, and k is the wave number. 10. The intelligent grouting sleeve system with a built-in annular ultrasonic sensor array according to claim 9, characterized in that: the outer side of the sensor array (6) is provided with a polyethylene adhesive layer, and the polyethylene adhesive layer is wrapped around the sensor array (6) and the outside of the sleeve housing (1), the sensor array (6) includes several groups of defect detection sensors, each group of defect detection sensors is arranged at intervals, and each group of defect detection sensors includes an exciter (3) and a receiver (4), the exciter (3) and the receiver (4) are arranged relatively; The grouting port (2) includes a grouting inlet and a grouting outlet, the grouting inlet and the grouting outlet are respectively arranged on the two ends of the sleeve housing (1), and are arranged on the same side, and the two ends of the sleeve housing (1) are provided with Connect the threaded port (10), and the inside of the sleeve housing (1) is provided with a central steel bar (8).

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