Intelligent sensor for ultrasonic detection of concrete aggregate strength and detection method

Abstract

The invention relates to the technical field of detection devices, in particular to an intelligent sensor for ultrasonic detection of concrete aggregate strength and a detection method. The invention discloses an intelligent sensor for ultrasonic detection of concrete aggregate strength. The intelligent sensor comprises a holder, a detection mechanism and an adjusting mechanism, wherein the detection mechanism comprises a detection frame, a laser detection head, a detection head, a smearing pipe and a transmission assembly. And a coupling agent and a piston are arranged in the smearing pipe. The laser detection head measures the surface roughness of a to-be-detected position, the transmission assembly pushes the piston to move, and the coupling agent is coated on a detection surface. The larger the roughness of the detection surface is, the longer the moving stroke of the piston is, and therefore it is ensured that the coupling agent fully fills micro-pores and uneven positions of the detection surface. The invention provides an intelligent sensor for ultrasonic detection of concrete aggregate strength and a detection method, and aims to solve the problem that a detection result is influenced by incomplete coupling agent filling caused by unstable pressure and uneven surface when a detection surface is filled with a coupling agent by an existing detection device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection devices, in particular to an intelligent sensor for ultrasonic detection of concrete aggregate strength and a detection method. BACKGROUND

[0002] As the most core structural material in construction engineering, the mechanical properties of concrete directly determine the bearing capacity, safety stability and long-term durability of the engineering structure. As the "skeleton" of concrete, the strength characteristics, morphology and distribution state of aggregate are the key core factors that restrict the overall strength and mechanical properties of concrete. At present, ultrasonic detection technology has become one of the most widely used detection technologies in the field of concrete and aggregate performance evaluation due to its advantages of non-destructive detection, fast detection speed, convenient operation, controllable cost and no damage to structural integrity, and plays an irreplaceable role in engineering quality acceptance, long-term operation and maintenance monitoring and other scenarios.

[0003] With the development of Internet of Things, embedded systems and intelligent sensing technology, ultrasonic detection technology is evolving towards integration and intelligence. The industry urgently needs an intelligent sensor specifically for concrete aggregate strength detection. The core is to highly integrate ultrasonic excitation, high-sensitivity reception, signal preprocessing and feature extraction algorithms into a compact integrated device. This intelligent sensor can autonomously complete the transmission and collection of acoustic signals, and directly analyze and calculate key features such as wave speed and frequency spectrum in real time on the terminal, and preliminarily evaluate the aggregate strength through embedded algorithm models. At the same time, it should have wireless communication, self-power supply and edge computing capabilities, and can work independently and directly output diagnostic results to solve the drawbacks existing in traditional detection, further promote the development of concrete aggregate strength detection towards intelligence, efficiency and precision, and provide more reliable technical support for engineering structure safety protection.

[0004] The invention patent application with publication number CN116203140A provides a coupling agent circulation system and an ultrasonic detection device. The system realizes automatic supply and recycling of coupling agent through the circulation device, and effectively prevents damage to the equipment caused by coupling agent overflow. However, in actual detection, there are differences in the surface roughness of different measurement points, and the pressure applied by manual compression of the probe is difficult to maintain constant, resulting in inconsistent filling effect of the coupling agent between the probe and the test piece, and different air exclusion levels. This makes it difficult to maintain stable and uniform coupling conditions for each detection, thereby introducing systematic errors and affecting the repeatability and accuracy of the measurement results. SUMMARY

[0005] The application provides an intelligent sensor for ultrasonic detection of concrete aggregate strength and a detection method to solve the problem of incomplete coupling agent filling caused by unstable pressure and uneven surface when filling the coupling agent on the detection surface of the existing detection device, thereby affecting the detection result.

[0006] The application discloses an intelligent sensor for ultrasonic detection of concrete aggregate strength and a detection method.

[0007] The detection mechanism comprises a detection frame, a laser detection head, a probe head, an application tube and a transmission assembly.

[0008] The application tube is arranged along the axial direction of the second cylinder, and the application tube contains the coupling agent and is provided with a piston sliding along the axial direction of the application tube.

[0009] The second cylinder is used for corresponding to the detection position without the application of the coupling agent, and the first cylinder is used for corresponding to the detection position with the application of the coupling agent.

[0010] Further, the detection frame and the holder are first moved away from each other, then the detection frame is rotated, and finally the detection frame and the holder are moved close to each other, so that the first state and the second state of the detection mechanism are changed.

[0011] The adjustment mechanism comprises a first driving assembly, and the first driving assembly comprises a motor and a rotating rod.

[0012] Further, the adjusting mechanism further comprises a second driving assembly, the second driving assembly comprises a first hydraulic rod, the first hydraulic rod is fixedly arranged on the detection frame, and the elongated end of the first hydraulic rod is rotationally connected with the holding frame. When the first hydraulic rod is shortened, the detection frame and the holding frame are driven to move close to each other. When the first hydraulic rod is elongated, the detection frame and the holding frame are driven to move away from each other.

[0013] Further, the applicator tube is provided with a heater, and the heater is used for heating the coupling agent in the applicator tube.

[0014] Further, the second cylinder inner circumferential wall is provided with a first straight groove and a first inclined groove. The first straight groove is arranged along the axial direction of the second cylinder. The first inclined groove is located at one end of the first straight groove away from the detection frame and is in communication with the first straight groove.

[0015] The applicator assembly further comprises a rotating disc and a fixed disc. The fixed disc is fixedly arranged at one end of the applicator tube close to the holding frame, and the fixed disc and the applicator tube are coaxially arranged. The fixed disc is provided with a plurality of first through holes. The rotating disc is rotationally arranged on the applicator tube and is located at one side of the fixed disc close to the holding frame. The rotating disc and the fixed disc are coaxially arranged, and the rotating disc is provided with a plurality of second through holes, each of which corresponds to a first through hole.

[0016] The rotating disc is fixedly provided with a first protrusion, and the first protrusion is slidingly arranged in the first straight groove or the first inclined groove. When the first protrusion is in the first straight groove, the first through hole and the second through hole are not in communication. When the first protrusion is in the first inclined groove, the first through hole and the second through hole are in communication.

[0017] Further, the transmission assembly comprises a second hydraulic rod, and the second hydraulic rod is fixedly arranged on the detection frame. The elongated end of the second hydraulic rod is arranged along the axial direction of the first cylinder and is fixedly connected with the piston. When the elongated end of the second hydraulic rod is elongated, the piston is driven to move towards the detection surface.

[0018] Further, a scraping piece is fixedly arranged on one side of the first cylinder close to the detection frame, and a storage groove is arranged in the first cylinder. The scraping piece is used for abutting against the end surface of the detection head outside the first cylinder and is used for removing impurities on the end surface of the detection head. The removed impurities are stored in the storage groove.

[0019] Further, a plurality of first sliding grooves and a plurality of second sliding grooves are arranged in the first cylinder. The plurality of first sliding grooves are sequentially distributed along the circumferential direction of the first cylinder, and the plurality of second sliding grooves are sequentially distributed along the circumferential direction of the first cylinder. The plurality of first sliding grooves and the plurality of second sliding grooves are alternately arranged, and the two ends of each first sliding groove are in communication with two adjacent second sliding grooves, respectively.

[0020] The probe head is an intelligent ultrasonic detection module integrating an ultrasonic transducer and front-end signal processing circuit. The probe head is rotatable relative to the detection frame. A second protrusion is fixedly mounted on the probe head and slidably disposed within a first or second groove. The probe head rotates as the second protrusion slides within the first or second groove.

[0021] Furthermore, a handle is fixedly mounted on the holder.

[0022] An ultrasonic testing method for concrete aggregate strength, utilizing a smart sensor for ultrasonic testing of concrete aggregate strength, includes the following steps: S1, align the cage and the detection surface, and align the second cylinder with the position to be detected. The detection mechanism is initially in the first state, with the laser detection head inside the second cylinder, detecting the roughness of the position to be detected.

[0023] S2, the adjustment mechanism causes the detection mechanism to change from the first state to the second state.

[0024] S3, the coating tube is inside the second cylinder, and coupling agent is applied to the location to be tested.

[0025] S4, Align the first cylinder with the position to be tested that has been coated with coupling agent, with the probe inside the first cylinder, and perform intensity detection on the position that has been coated with coupling agent.

[0026] The beneficial effects of this invention are as follows: The intelligent sensor for ultrasonic testing of concrete aggregate strength, through a set testing mechanism, first aligns the retainer and the testing surface, then aligns the second cylinder with the position to be tested. The testing mechanism is initially in a first state, with the laser testing head inside the second cylinder, measuring the surface roughness of the position to be tested. Subsequently, the testing mechanism is switched from the first state to the second state via an adjustment mechanism. Next, the application tube is placed inside the second cylinder, and the transmission assembly pushes the piston towards the testing surface, uniformly applying the coupling agent to the testing surface. Specifically, the greater the surface roughness, the longer the piston's stroke towards the testing surface, resulting in a corresponding increase in applied pressure and a greater amount of coupling agent discharged, thereby ensuring that the coupling agent fully fills the micropores and uneven areas of the concrete surface.

[0027] Finally, the first cylinder is aligned with the detection position coated with coupling agent, so that the probe is inside the first cylinder, and the intensity at that position is measured. Because the first cylinder is perpendicular to the detection surface and the probe is guided by it, probe tilting can be effectively prevented, improving the consistency and accuracy of the detection. Attached Figure Description

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0029] Figure 1 A structural schematic diagram of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 2 A partial structural schematic diagram of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 3 Another partial structural schematic diagram of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 4 A structural schematic diagram of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 5 A sectional view of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 6 A structural schematic diagram of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure. Figure 5 An enlarged view of A in the figure. Figure 7 A partial structural sectional view of a detection mechanism of an intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application is shown in the figure.

[0030] In the figure: 110, holder; 111, handle; 113, rotating rod; 114, motor; 115, first hydraulic rod; 120, first cylinder; 121, scraper; 122, storage groove; 123, third straight groove; 124, third inclined groove; 125, second straight groove; 126, second inclined groove; 130, second cylinder; 131, first straight groove; 132, first inclined groove; 200, detection frame; 210, probe head; 211, second protrusion; 220, smearing tube; 221, second hydraulic rod; 224, piston; 225, heater; 226, rotating disc; 227, fixed disc; 230, laser detection head. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0032] Referring to Figures 1 to 7 As shown in the drawings, the intelligent sensor for ultrasonic detection of concrete aggregate strength provided by the embodiment of the present application comprises a holder 110, a detection mechanism and an adjusting mechanism, and the holder 110 is provided with a first cylinder 120 and a second cylinder 130. The first cylinder 120 and the second cylinder 130 are perpendicular to the detection surface and abut each other, and are distributed in sequence along a first direction, which is perpendicular to the axial direction of the first cylinder 120.

[0033] The detection mechanism comprises a detection frame 200, a laser detection head 230, a probe head 210, an application tube 220 and a transmission assembly. The detection frame 200 is rotationally arranged on the holder 110 and can move relative to the holder 110. The laser detection head 230, the probe head 210 and the application tube 220 are arranged on the detection frame 200. The laser detection head 230 is used for detecting the roughness of the detection surface.

[0034] The application tube 220 is arranged along the axial direction of the second cylinder 130, and the application tube 220 contains a coupling agent and is provided with a piston 224 which slides along the axial direction of the application tube 220. When the piston 224 moves towards the detection surface, the coupling agent is pushed to the detection surface. The transmission assembly is used for driving the piston 224 to move. The greater the roughness of the detection surface is, the more the piston 224 moves towards the detection surface. The probe head 210 is used for emitting and receiving ultrasonic signals to the detection surface which has been applied with the coupling agent, and directly outputs analysis results representing the strength of the concrete aggregate according to the signals.

[0035] The second cylinder 130 is used for corresponding to the detection position which has not been applied with the coupling agent, and the first cylinder 120 is used for corresponding to the detection position which has been applied with the coupling agent. The detection mechanism has a first state and a second state. In the first state, the laser detection head 230 is in the second cylinder 130, and the probe head 210 is outside the first cylinder 120. In the second state, the probe head 210 is in the first cylinder 120, and the application tube 220 is in the second cylinder 130. The adjusting mechanism changes the relative position between the detection frame 200 and the holder 110, so that the first state and the second state of the detection mechanism are transformed into each other.

[0036] The holder 110 and the detection surface are first abutted, and the second cylinder 130 is aligned to the position to be detected. The detection mechanism is first in the first state, and the laser detection head 230 is in the second cylinder 130 to measure the surface roughness of the position to be detected. Then, the detection mechanism is switched from the first state to the second state by the adjusting mechanism. Then, the coating tube 220 is in the second cylinder 130, and the transmission assembly drives the piston 224 to move towards the detection surface to uniformly coat the coupling agent on the detection surface. The rougher the detection surface, the longer the stroke of the piston 224 moving towards the detection surface, and the greater the applied pressure and the more coupling agent discharged, so as to ensure that the coupling agent sufficiently fills the micro-pores and unevenness of the concrete surface.

[0037] Finally, the first cylinder 120 is aligned to the position to be detected which has been coated with the coupling agent, and the probe head 210 is in the first cylinder 120 to detect the strength of the position. Since the first cylinder 120 is perpendicular to the detection surface, and the probe head 210 is guided thereby, the probe head can be effectively prevented from tilting, and the consistency and accuracy of the detection are improved. An intelligent sensor for ultrasonic detection of the strength of a concrete aggregate can autonomously complete the whole process from surface evaluation, adaptive coating of the coupling agent, to detection of the strength of the aggregate and output of the results based on the detection data of the laser detection head 230 and the probe head 210.

[0038] In the embodiment, the detection frame 200 and the holder 110 are first moved away from each other, then the detection frame 200 is rotated, and finally the detection frame 200 and the holder 110 are moved close to each other, so that the first state and the second state of the detection mechanism are switched.

[0039] The adjusting mechanism includes a first driving assembly, and the first driving assembly includes the motor 114 and the rotating rod 113. The rotating rod 113 is arranged along the axial direction of the first cylinder 120, is rotationally arranged on the holder 110, and is between the first cylinder 120 and the second cylinder 130. The detection frame 200 is slidably arranged on the rotating rod 113 along the axial direction of the first cylinder 120 and can be synchronously rotated with the rotating rod 113. The motor 114 is fixed on the holder 110, and an output shaft of the motor 114 is fixedly connected with the rotating rod 113. When the motor 114 is started, the motor 114 drives the rotating rod 113 to rotate, and the rotating rod 113 drives the detection frame 200 to rotate.

[0040] In the embodiment, the adjusting mechanism further includes a second driving assembly, and the second driving assembly includes the first hydraulic rod 115. The first hydraulic rod 115 is fixedly arranged on the detection frame 200, and a long end of the first hydraulic rod 115 is rotationally connected with the holder 110. When the first hydraulic rod 115 is shortened, the detection frame 200 and the holder 110 are moved close to each other. When the first hydraulic rod 115 is lengthened, the detection frame 200 and the holder 110 are moved away from each other.

[0041] In the embodiment, the applicator tube 220 is provided with a heater 225 for heating the coupling agent in the applicator tube 220, a temperature sensor for monitoring the temperature of the coupling agent in real time, and a first controller for receiving the temperature of the coupling agent sensed by the temperature sensor and controlling the temperature of the heater 225 so that the temperature of the coupling agent is within a set temperature range.

[0042] In the embodiment, the inner wall of the second cylinder 130 is provided with a first straight slot 131 and a first inclined slot 132. The first straight slot 131 is arranged along the axial direction of the second cylinder 130. The first inclined slot 132 is located at one end of the first straight slot 131 away from the detection frame 200 and communicates with the first straight slot 131. The first inclined slot 132 gradually deviates from the first straight slot 131 in a direction gradually away from the detection frame 200.

[0043] The applicator assembly further comprises a rotating disc 226 and a fixed disc 227. The fixed disc 227 is fixedly arranged at one end of the applicator tube 220 close to the holding frame 110, and the fixed disc 227 and the applicator tube 220 are coaxially arranged. The fixed disc 227 is provided with a plurality of first through holes.

[0044] The rotating disc 226 is rotatably arranged on the applicator tube 220 and located at one side of the fixed disc 227 close to the holding frame 110. The rotating disc 226 and the fixed disc 227 are coaxially arranged, and the rotating disc 226 is provided with a plurality of second through holes, each of which corresponds to a first through hole.

[0045] The rotating disc 226 is fixedly provided with a first protrusion 228 which is slidingly arranged in the first straight slot 131 or the first inclined slot 132. When the first protrusion 228 is in the first straight slot 131, the first through hole and the second through hole are not communicated. When the first protrusion 228 is in the first inclined slot 132, the first through hole and the second through hole are communicated.

[0046] In the embodiment, the transmission assembly comprises a second hydraulic rod 221 and a second controller. The second hydraulic rod 221 is fixedly arranged on the detection frame 200. The elongated end of the second hydraulic rod 221 is arranged along the axial direction of the first cylinder 120 and is fixedly connected with the piston 224.

[0047] The second controller is arranged on the second hydraulic rod 221 and controls the elongation of the second hydraulic rod 221 by detecting the roughness of the detection surface through the laser detection head 230. The greater the roughness of the detection surface, the greater the elongation of the second hydraulic rod 221.

[0048] In the embodiment, the first cylinder 120 is fixedly provided with a scraping sheet 121 close to one side of the detection frame 200, and the first cylinder 120 is provided with a storage groove 122. The scraping sheet 121 is used to abut against the end face of the probe head 210 outside the first cylinder 120, and when the scraping sheet 121 and the probe head 210 rotate relative to each other, the scraping sheet 121 is used to remove impurities on the end face of the probe head 210, and the removed impurities are stored in the storage groove 122.

[0049] In the embodiment, a plurality of first sliding grooves and a plurality of second sliding grooves are formed in the first cylinder 120, the plurality of first sliding grooves are sequentially distributed along the circumference of the first cylinder 120, and the plurality of second sliding grooves are sequentially distributed along the circumference of the first cylinder 120. The plurality of first sliding grooves and the plurality of second sliding grooves are alternately arranged, and the two ends of the first sliding groove are respectively communicated with the two adjacent second sliding grooves.

[0050] The first sliding groove includes a second straight groove 125 and a second inclined groove 126, and the second straight groove 125 and the second inclined groove 126 are sequentially distributed along the direction gradually close to the detection frame 200. The second sliding groove includes a third straight groove 123 and a third inclined groove 124, and the third straight groove 123 and the third inclined groove 124 are sequentially distributed along the direction gradually away from the detection frame 200.

[0051] The inclined directions of the second inclined groove 126 and the third inclined groove 124 are opposite. The two ends of each second inclined groove 126 are respectively communicated with the second straight groove 125 and the third straight groove 123. The two ends of each third inclined groove 124 are respectively communicated with the second straight groove 125 and the third straight groove 123.

[0052] The probe head 210 is an intelligent ultrasonic detection module integrated with an ultrasonic transducer and a front-end signal processing circuit. The probe head 210 can rotate relative to the detection frame 200, and there is damping between the probe head 210 and the detection frame 200, which is used to suppress the free rotation of the probe head 210 and ensure the stability of the position.

[0053] The second protrusion 211 is fixedly arranged on the probe head 210 and is slidingly arranged in the first sliding groove or the second sliding groove. When the probe head 210 moves towards the first cylinder 120, the second protrusion 211 first enters the third straight groove 123, then enters the third inclined groove 124, and then enters the second straight groove 125. When the probe head 210 moves away from the first cylinder 120, the second protrusion 211 enters the second inclined groove 126 from the second straight groove 125, and finally enters the third straight groove 123. Therefore, the probe head 210 rotates in a single direction during the back-and-forth movement. When detecting a curved surface, part of the probe head 210 abuts against the curved surface, and by rotating the probe head 210, the part of the probe head 210 abutting against the curved surface each time is changed, so that the wear of the probe head 210 is more uniform, thereby prolonging the service life of the probe head 210.

[0054] AsFigure 6 As shown, the intersection of the third chute 124 and the second chute 126 near the third straight slot 123 is in the second chute 126, and the intersection of the third chute 124 and the second chute 126 near the second straight slot 125 is in the third chute 124; This makes the probe head 210 move towards the first cylinder 120, and when the second protrusion 211 is in the third straight slot 123, the second protrusion 211 is in contact with the side wall of the third chute 124 under the guidance of the third chute 124, and then moves in the third chute 124 under the guidance of the third chute 124 and finally enters the second straight slot 125; similarly, when the probe head 210 moves away from the first cylinder 120, the second protrusion 211 is in contact with the side wall of the second chute 126 under the guidance of the second chute 125, and then moves in the second chute 126 under the guidance of the second chute 126 and finally enters the third straight slot 123, thereby realizing the rotation of the probe head 210 in a single direction.

[0055] In this embodiment, a handle 111 is fixedly arranged on the retainer 110. The handle 111 is held, and the retainer 110 and the detection surface are tightly abutted.

[0056] An embodiment of the concrete aggregate strength ultrasonic detection method of the application utilizes the above-mentioned intelligent sensor for concrete aggregate strength ultrasonic detection, and comprises the following steps: An embodiment of the concrete aggregate strength ultrasonic detection method of the application utilizes the above-mentioned intelligent sensor for concrete aggregate strength ultrasonic detection, and comprises the following steps: For the first to-be-detected position: S1, roughness detection: the retainer 110 is abutted against the concrete detection surface, and the second cylinder 130 is aligned with the first to-be-detected position. At this time, the detection mechanism is in the first state, and the first through hole on the rotating disc 226 and the second through hole on the fixed disc 227 are not communicated at the beginning. In the first state, the laser detection head 230 in the second cylinder 130 is started, and the surface roughness of the current to-be-detected position is detected.

[0057] S2, switching between the first state and the second state: the first hydraulic rod 115 is started, the first hydraulic rod 115 is elongated, the retainer 110 and the detection frame 200 are away from each other, and the laser detection head 230 exits the second cylinder 130. Then the motor 114 is started, the motor 114 drives the rotating rod 113 to rotate, the rotating rod 113 drives the detection frame 200 to rotate, and the smearing pipe 220 is aligned with the second cylinder 130. Then the first hydraulic rod 115 is started, the first hydraulic rod 115 is shortened, and then the retainer 110 and the detection frame 200 are close to each other, the smearing pipe 220 extends into the second cylinder 130, and the probe head 210 enters the first cylinder 120.

[0058] In this process, the first protrusion 228 fixed on the rotating disc 226 slides along the first straight slot 131 on the inner wall of the second cylinder 130, and the first through hole and the second through hole are not connected at this time. When the first protrusion 228 slides into the first inclined slot 132 as the detection frame 200 continues to approach, the rotating disc 226 rotates relatively, and the first through hole and the second through hole gradually align and connect. At this time, the detection mechanism is switched to the second state.

[0059] S3, coupling agent adaptive coating and detection of the detection surface: start the second hydraulic rod 221, the second hydraulic rod 221 is elongated to push the piston 224 to move, and the piston 224 extrudes the coupling agent in the coating pipe 220 to the detection surface through the connected first through hole and second through hole. The second controller controls the elongation of the second hydraulic rod 221 according to the roughness data measured by the laser detection head 230. The greater the roughness of the detection surface, the greater the elongation of the second hydraulic rod 221, thereby providing greater pressure and enabling the piston 224 to push out more coupling agent, ensuring that the coupling agent fills the micro-pores and concave-convex of the concrete surface.

[0060] S4, then the holder 110 and the detection frame 200 are synchronously taken out and translated, so that the second cylinder 130 is aligned with the second to be detected position, while the first cylinder 120 is aligned with the first detection position where the coupling agent has been coated, and the probe head 210 detects the intensity of the first detection position where the coupling agent has been coated. And since the first cylinder 120 is perpendicular to the detection surface, the probe head 210 is in the first cylinder 120, which can prevent the probe from tilting and keep the vertical force.

[0061] For the second to the second-to-last detection position, the following process is repeated: S1, first make the detection mechanism in the first state, and the laser detection head 230 detects the roughness of the new position.

[0062] S2, the adjusting mechanism switches the detection mechanism from the first state to the second state.

[0063] S3, the coating pipe 220 coats the new position with coupling agent.

[0064] S4, the probe head 210 detects the intensity of the previous position where the coupling agent has been coated, and then the whole translation device is translated to the next position, and the cycle is repeated.

[0065] For the second to the second-to-last detection position, the coating pipe 220 coats the new position with coupling agent in steps S3 and S4, and the probe head 210 detects the intensity of the previous position where the coupling agent has been coated. They can be performed at the same time. Since the detection mechanism can realize synchronous coating of coupling agent and intensity detection, the efficiency of detection is improved.

[0066] For the last detection position: After the detection of the second last detection position, the device has completed the roughness detection of the last detection position. While the coupler is being applied to the last detection position, the probe head 210 is performing intensity detection on the second last detection position. The holder 110 and the detection frame 200 are then removed synchronously, and the second cartridge 130 is aligned to the last detection position alone, so that the probe head 210 performs intensity detection on the last detection position, ensuring the integrity and consistency of the detection results.

[0067] The above description is merely preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A smart sensor for ultrasonic testing of concrete aggregate strength, characterized in that: It includes a cage, a detection mechanism, and an adjustment mechanism. The cage is provided with a first cylinder and a second cylinder. The first cylinder and the second cylinder are both perpendicular to the detection surface and abut against each other, and are distributed sequentially along a first direction, which is perpendicular to the axial direction of the first cylinder. The testing mechanism includes a testing frame, a laser testing head, a probe, a coating tube, and a transmission assembly. The testing frame is rotatably mounted on a retainer and can move relative to the retainer. The laser testing head, probe, and coating tube are all mounted on the testing frame. The laser testing head is used to test the roughness of the surface being tested. The coating tube is arranged along the axial direction of the second cylinder. The coating tube contains a coupling agent and is equipped with a piston that slides along the axial direction of the coating tube. When the piston moves closer to the detection surface, it pushes the coupling agent to the detection surface. The transmission component is used to drive the piston to move. The greater the roughness of the detection surface, the more the piston moves closer to the detection surface. The probe is used to emit and receive ultrasonic signals to the detection surface that has been coated with coupling agent, and directly output the analysis results characterizing the strength of concrete aggregate based on the signals. The second tube is used to correspond to the detection positions where no coupling agent has been applied, and the first tube is used to correspond to the detection positions where coupling agent has been applied. The testing mechanism has a first state and a second state. In the first state, the laser detection head is inside the second cylinder and the probe head is outside the first cylinder. In the second state, the probe head is inside the first cylinder and the coating tube is inside the second cylinder. The adjustment mechanism changes the relative positions of the testing frame and the retainer, so that the first state and the second state of the testing mechanism can be switched between each other.

2. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: The testing frame and the retainer first move away from each other, then the testing frame rotates, and finally the testing frame and the retainer move closer to each other, so that the first state and the second state of the testing mechanism change with each other. The adjustment mechanism includes a first drive assembly, which includes a motor and a rotating rod. The rotating rod is arranged along the axial direction of the first cylinder and is rotatably mounted on a retainer. The detection frame is slidably mounted on the rotating rod and can rotate synchronously with the rotating rod. The motor is fixed on the retainer, and the output shaft of the motor is fixedly connected to the rotating rod.

3. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 2, characterized in that: The adjustment mechanism also includes a second drive assembly, which includes a first hydraulic rod. The first hydraulic rod is fixedly mounted on the test frame, and the extended end of the first hydraulic rod is rotatably connected to the retainer. When the first hydraulic rod is shortened, it causes the test frame and the retainer to move closer to each other. When the first hydraulic rod is extended, it causes the test frame and the retainer to move further apart.

4. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: A heater is installed inside the application tube to heat the coupling agent inside the application tube.

5. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: The inner circumferential wall of the second cylinder is provided with a first straight groove and a first inclined groove; the first straight groove is arranged along the axial direction of the second cylinder; the first inclined groove is located at the end of the first straight groove away from the detection frame and is connected to the first straight groove. The application assembly also includes a rotating disk and a fixed disk; the fixed disk is fixedly disposed at one end of the application tube near the retainer, and the fixed disk and the application tube are coaxially arranged; the fixed disk has a plurality of first through holes; the rotating disk is rotatably disposed on the application tube and is located on the side of the fixed disk near the retainer, the rotating disk and the fixed disk are coaxially arranged, and the rotating disk has a plurality of second through holes, each second through hole corresponding to a first through hole; A first protrusion is fixedly provided on the rotating disk, and the first protrusion is slidably disposed in the first straight groove or the first inclined groove; when the first protrusion is in the first straight groove, the first through hole and the second through hole are not connected; when the first protrusion is in the first inclined groove, the first through hole and the second through hole are connected.

6. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 2, characterized in that: The transmission assembly includes a second hydraulic rod, which is fixedly mounted on the detection frame. The extended end of the second hydraulic rod is arranged along the axial direction of the first cylinder and is fixedly connected to the piston. When the extended end of the second hydraulic rod extends, it drives the piston to move towards the detection surface.

7. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: A scraper is fixedly installed on the side of the first cylinder near the detection frame, and a storage tank is provided inside the first cylinder; the scraper is used to abut against the end face of the probe outside the first cylinder and to remove impurities from the end face of the probe, and the removed impurities are stored in the storage tank.

8. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: The first cylinder has multiple first sliding grooves and multiple second sliding grooves. The multiple first sliding grooves are distributed sequentially along the circumference of the first cylinder, and the multiple second sliding grooves are distributed sequentially along the circumference of the first cylinder. The multiple first sliding grooves and multiple second sliding grooves are alternately arranged, and the two ends of the first sliding groove are respectively connected to two adjacent second sliding grooves. The probe head is an intelligent ultrasonic detection module that integrates an ultrasonic transducer and a front-end signal processing circuit. The probe head can rotate relative to the detection frame. A second protrusion is fixedly installed on the probe head and is slidably installed in the first or second slide groove. When the second protrusion slides in the first or second slide groove, the probe head rotates.

9. The intelligent sensor for ultrasonic testing of concrete aggregate strength according to claim 1, characterized in that: A handle is fixedly mounted on the cage.

10. An ultrasonic testing method for the strength of concrete aggregate, utilizing an intelligent sensor for ultrasonic testing of concrete aggregate strength as described in any one of claims 1-9, characterized in that, Includes the following steps: S1, align the cage and the detection surface, and align the second cylinder with the position to be detected; the detection mechanism is initially in the first state, the laser detection head is inside the second cylinder, and the roughness of the position to be detected is detected; S2, the adjustment mechanism causes the detection mechanism to change from the first state to the second state; S3, the coating tube is inside the second cylinder, and coupling agent is applied to the area to be tested; S4. Align the first cylinder with the position to be tested that has been coated with coupling agent. The probe is inside the first cylinder and the probe performs intensity detection on the position that has been coated with coupling agent.

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