Metal crack detection device, method and equipment

Abstract

The present invention discloses a metal crack detection device, method and equipment, the device includes a dielectric substrate, an energy control mechanism, a host computer, a plurality of resonant unit groups and microstrip transmission modules symmetrically arranged at both ends of the dielectric substrate; each resonant unit group is arranged at the central position of the dielectric substrate according to a preset spacing, and is connected to the energy control mechanism; a group of microstrip transmission modules is connected to another group of microstrip transmission modules through a plurality of resonant unit groups connected in sequence; the microstrip transmission module is connected to the host computer for communication; the energy control mechanism is used to generate an electrical signal; the resonant unit group is used to perform crack detection on the metal to be detected based on the received electrical signal and adopts a magnetic field energy signal to generate a resonant frequency point; the host computer is used to output the crack detection result based on the plurality of resonant frequencies. The present invention solves the technical problem that the existing metal crack detection method is affected by the distribution of the antenna resonant unit field, resulting in the inability to achieve large-scale crack detection.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a metal crack detection device, method and equipment. Background Art

[0002] Metals or metal components are widely used in industrial production equipment, various infrastructures and other fields. With the continuous improvement of the adaptability and bearing capacity requirements of related industrial production environments, the base structures of metals or metal components in the above-mentioned fields are facing higher load requirements and harsher working environments.

[0003] During the use of industrial production equipment and various infrastructures, metal materials are inevitably subjected to stress, which leads to the generation of metal cracks. If the cracks cannot be detected in a timely and effective manner, they will gradually grow and may cause structural failure, which may lead to serious safety accidents and cause huge economic losses.

[0004] Most of the existing metal crack detection methods use microstrip antenna sensors, dielectric resonators, artificial surface plasmon polaritons (SSPP) designs, etc. However, the detection characteristics in the above methods are S parameter amplitudes, which are easily interfered by external factors and affected by the distribution of the antenna resonant unit field. They can only be used for hotspot detection in local areas, resulting in the inability to achieve large-scale crack detection. Summary of the invention

[0005] The present invention provides a metal crack detection device, method and equipment, which solves the technical problem that the existing metal crack detection method is affected by the distribution of the antenna resonant unit field and can only be used for hot spot detection in local areas, resulting in the inability to achieve large-scale crack detection.

[0006] A first aspect of the present invention provides a metal crack detection device, the device comprising a dielectric substrate, an energy control mechanism, a host computer, a plurality of resonant unit groups, and microstrip transmission modules symmetrically arranged at two ends of the dielectric substrate;

[0007] Each of the resonant unit groups is arranged at a central position of the dielectric substrate according to a preset interval, and is connected to the energy control mechanism;

[0008] One group of the microstrip transmission modules is connected to another group of the microstrip transmission modules through a plurality of the resonant unit groups connected in sequence;

[0009] The microstrip transmission module is communicatively connected with the host computer, and the microstrip transmission module is used to obtain electromagnetic wave energy signals and supply energy to each of the resonant unit groups;

[0010] The energy control mechanism is used to obtain the electromagnetic wave energy signal and perform signal conversion, generate an electrical signal and transmit it to each of the resonance unit groups;

[0011] The resonant unit group is used to generate a magnetic field energy signal based on the received electrical signal, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate a resonant frequency point and send it to the host computer through the microstrip transmission module;

[0012] The host computer is used to obtain and output the crack detection result corresponding to the metal to be detected based on the multiple resonant frequency points.

[0013] Optionally, the resonant unit group includes a radio frequency switch, an adjustable capacitor and a resonant ring;

[0014] The first end of the radio frequency switch is connected to the energy control mechanism, and the second end of the radio frequency switch is connected to the first end of the adjustable capacitor;

[0015] The second end of the adjustable capacitor is connected to the energy control mechanism, and the third end of the adjustable capacitor is connected to one end of the resonant ring;

[0016] The third end of the radio frequency switch is connected to the other end of the resonant ring;

[0017] One group of the microstrip transmission modules is connected to another group of the microstrip transmission modules through a plurality of the resonant rings connected in sequence;

[0018] The radio frequency switch is used to respond to the electrical signal and perform a closing operation;

[0019] The adjustable capacitor is used to adjust the operating frequency of the resonant ring based on the electrical signal transmitted by the energy control mechanism;

[0020] The resonant ring is used to generate a magnetic field energy signal when the operating frequency reaches a preset frequency threshold, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate a resonant frequency point, and send it to the host computer through the microstrip transmission module.

[0021] Optionally, the host computer is specifically used to:

[0022] Using preset frequency point values ​​to compare with the received resonant frequency points respectively;

[0023] When any of the resonant frequency points is less than the preset frequency point value, outputting a first crack detection result corresponding to the metal to be detected;

[0024] When each of the resonant frequency points is greater than or equal to the preset frequency point value, a second crack detection result corresponding to the metal to be detected is output.

[0025] Optionally, the energy control mechanism comprises an energy acquisition module and a micro control unit connected in sequence;

[0026] The first end of the radio frequency switch and the second end of the adjustable capacitor are both connected to the micro control unit;

[0027] The energy acquisition module is used to acquire electromagnetic wave energy signals and perform signal conversion, generate electrical signals and transmit them to the micro control unit;

[0028] The micro control unit is used for transmitting the received electrical signal to the radio frequency switch and the adjustable capacitor of each resonant unit group.

[0029] Optionally, the microstrip transmission module includes a microstrip antenna and a microstrip transmission line;

[0030] The two ends of the dielectric substrate are symmetrically provided with the microstrip antenna and the microstrip transmission line connected in sequence;

[0031] The microstrip antenna is communicatively connected to the host computer;

[0032] One group of the microstrip transmission lines is connected to another group of the microstrip transmission lines through a plurality of the resonant rings connected in sequence;

[0033] The microstrip antenna is used to obtain the electromagnetic wave energy signal and supply energy to each resonant ring through the microstrip transmission line.

[0034] A second aspect of the present invention provides a metal crack detection method, which is applied to the above-mentioned metal crack detection device and is characterized by comprising:

[0035] Acquire electromagnetic wave energy signals and convert them into electrical signals;

[0036] Based on the electrical signal, generating a plurality of magnetic field energy signals;

[0037] Each of the magnetic field energy signals is used to perform crack detection on the metal to be detected, and a crack detection result corresponding to the metal to be detected is output.

[0038] Optionally, the step of generating a plurality of magnetic field energy signals based on the electrical signal comprises:

[0039] Based on the electrical signal, adjusting the operating frequency of the resonant ring in each resonant unit group;

[0040] When the operating frequency of each of the resonant rings reaches a preset frequency threshold, a magnetic field energy signal corresponding to each of the resonant rings is generated.

[0041] Optionally, the step of using each of the magnetic field energy signals to perform crack detection on the metal to be detected and outputting the crack detection result corresponding to the metal to be detected includes:

[0042] Using each of the magnetic field energy signals to perform crack detection on the metal to be detected, and generating a corresponding resonant frequency point;

[0043] The preset frequency point values ​​are used to compare with the resonant frequency points respectively, and the crack detection results corresponding to the metal to be detected are output.

[0044] Optionally, the step of using preset frequency points to compare with each of the resonant frequency points respectively and outputting the crack detection result corresponding to the metal to be detected includes:

[0045] Using preset frequency points to compare with each of the resonant frequency points;

[0046] When any of the resonant frequency points is less than the preset frequency point value, outputting a first crack detection result corresponding to the metal to be detected;

[0047] When each of the resonant frequency points is greater than or equal to the preset frequency point value, a second crack detection result corresponding to the metal to be detected is output.

[0048] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the metal crack detection method as described in any one of the above items.

[0049] It can be seen from the above technical solutions that the present invention has the following advantages:

[0050] The first aspect of the above technical solution of the present invention provides a metal crack detection device, which includes a dielectric substrate, an energy control mechanism, a host computer, a plurality of resonant unit groups and microstrip transmission modules symmetrically arranged at both ends of the dielectric substrate; wherein each resonant unit group is arranged at a central position of the dielectric substrate according to a preset spacing, and is connected to the energy control mechanism; a group of microstrip transmission modules is connected to another group of microstrip transmission modules through a plurality of resonant unit groups connected in sequence; the microstrip transmission module is communicatively connected to the host computer, and an electromagnetic wave energy signal is obtained through the microstrip transmission module and energy is supplied to each resonant unit group; first, the electromagnetic wave energy signal is obtained through the energy control mechanism and the signal is converted to generate an electrical signal and transmitted to each resonant unit group; then, a magnetic field energy signal is generated based on the received electrical signal through the resonant unit group, and the magnetic field energy is used to generate a magnetic field energy signal. The signal is used to detect cracks in the metal to be detected, and a resonant frequency is generated and sent to the host computer through the microstrip transmission module; finally, the host computer obtains and outputs the crack detection result corresponding to the metal to be detected based on multiple resonant frequencies; the above scheme obtains the electromagnetic wave energy signal through the microstrip transmission module and supplies power to each resonant unit group, which meets the demand for detecting frequency deviation. At the same time, the electrical signal is input to each resonant unit group through the energy control mechanism, and each resonant unit group is set at the central position of the dielectric substrate according to a preset spacing, and the metal to be detected is detected by multiple magnetic field energy signals output by each resonant unit group, realizing passive detection, and is not affected by the distribution of the antenna resonant unit field, is not limited to hot spot detection in local areas, and realizes spatial reconfiguration of the detection area, which can meet the needs of large-scale crack detection.

[0051] The second aspect of the above technical scheme of the present invention provides a metal crack detection method, which obtains electromagnetic wave energy signals and converts them to generate electrical signals; based on the electrical signals, generates multiple magnetic field energy signals; uses each magnetic field energy signal to perform crack detection on the metal to be detected, and outputs the crack detection results corresponding to the metal to be detected; the above scheme, through the process of generating multiple magnetic field energy signals based on electrical signals and using each magnetic field energy signal to perform crack detection on the metal to be detected, is not easily affected by external factors, compared with the existing process of metal crack detection based on artificial surface plasmon using S parameter amplitude as a detection feature, and realizes the spatial reconfiguration of the detection area, which can meet the needs of large-scale crack detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0053] Figure 1 A schematic structural diagram of a metal crack detection device provided in Embodiment 1 of the present invention;

[0054] Figure 2 A schematic diagram of the structure of a resonance unit group provided in Embodiment 1 of the present invention;

[0055] Figure 3 A schematic diagram of the distribution of magnetic field intensity under a microstrip transmission line in a healthy state and when a crack exists provided in Embodiment 1 of the present invention;

[0056] Figure 4 A schematic diagram of the shift of the resonant frequency when different crack depths vary with position provided in the first embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the shift of the resonant frequency when different crack widths vary with position provided in the first embodiment of the present invention;

[0058] Figure 6 A flowchart of the steps of a metal crack detection method provided in Embodiment 2 of the present invention.

[0059] The meanings of the reference numerals are as follows:

[0060] 1. Microstrip transmission line; 2. Resonant unit group; 3. Microstrip antenna; 4. Adjustable capacitor; 5. RF switch; 6. Dielectric substrate; 7. Energy acquisition module; 8. Microcontroller unit; 9. Resonant ring. DETAILED DESCRIPTION

[0061] The embodiments of the present invention provide a metal crack detection device, method and equipment, which are used to solve the technical problem that the existing metal crack detection method is affected by the distribution of the antenna resonance unit field and can only be used for hot spot detection in local areas, resulting in the inability to achieve large-scale crack detection.

[0062] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] See also Figure 1-Figure 2 , Figure 1 A metal crack detection device is provided in an embodiment of the present invention.

[0064] The present invention provides a metal crack detection device, which includes a dielectric substrate 6, an energy control mechanism, a host computer, a plurality of resonance unit groups 2, and microstrip transmission modules symmetrically arranged at both ends of the dielectric substrate 6; each resonance unit group 2 is arranged at a central position of the dielectric substrate 6 according to a preset spacing, and is connected to the energy control mechanism; a group of microstrip transmission modules is connected to another group of microstrip transmission modules through a plurality of resonance unit groups 2 connected in sequence; the microstrip transmission module is communicatively connected to the host computer, and the microstrip transmission module is used to obtain electromagnetic wave energy signals and supply energy to each resonance unit group 2; the energy control mechanism is used to obtain electromagnetic wave energy signals and perform signal conversion, generate electrical signals and transmit them to each resonance unit group 2; the resonance unit group 2 is used to generate a magnetic field energy signal based on the received electrical signal, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate resonance frequencies and send them to the host computer through the microstrip transmission module; the host computer is used to obtain and output crack detection results corresponding to the metal to be detected based on the plurality of resonance frequencies.

[0065] Optionally, the resonance unit group 2 includes a radio frequency switch 5, an adjustable capacitor 4 and a resonant ring 9; the first end of the radio frequency switch 5 is connected to the energy control mechanism, and the second end of the radio frequency switch 5 is connected to the first end of the adjustable capacitor 4; the second end of the adjustable capacitor 4 is connected to the energy control mechanism, and the third end of the adjustable capacitor 4 is connected to one end of the resonant ring 9; the third end of the radio frequency switch 5 is connected to the other end of the resonant ring 9; a group of microstrip transmission modules is connected to another group of microstrip transmission modules through a plurality of resonant rings 9 connected in sequence; the radio frequency switch 5 is used to respond to electrical signals and perform closing operations; the adjustable capacitor 4 is used to adjust the operating frequency of the resonant ring 9 based on the electrical signal transmitted by the energy control mechanism; the resonant ring 9 is used to generate a magnetic field energy signal when the operating frequency reaches a preset frequency threshold, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate a resonant frequency point and send it to the host computer through the microstrip transmission module.

[0066] It should be noted that the dielectric substrate 6, the energy control mechanism, the multiple resonant unit groups 2 and the microstrip transmission modules symmetrically arranged at both ends of the dielectric substrate 6 constitute a sensor structure. The electromagnetic wave energy signal is obtained by the energy acquisition module 7 and converted into an electrical signal to power the microcontroller unit 8. The output voltage signal (electrical signal) controls the working state (closing or opening) of the radio frequency switch 5 and controls the capacitance of the adjustable capacitor 4 to adjust the working frequency of the resonant ring 9, so that multiple resonant rings 9 arranged at a preset interval can work at one moment, and all resonant rings 9 can be traversed to perform crack detection on the metal to be detected, and the crack detection results are output to achieve the purpose of large-scale detection, overcome the problem of low consistency of crack detection due to coupling between resonant rings, and realize the spatial reconfiguration of the detection area to meet the needs of large-scale crack detection.

[0067] Furthermore, the electromagnetic wave energy signal is a signal sent by an electromagnetic wave transmitting device (external terminal), which is used to trigger the energy acquisition module 7 to receive the electromagnetic wave energy signal and perform signal conversion, and the output electrical signal is used to power the microcontroller unit 8 to control each resonant unit group 2 to perform crack detection on the metal to be detected; the dielectric substrate 6 is designed with a single-layer plate with a thickness of 0.127 mm; a control pin of the microcontroller unit 8 (MCU) controls the resonant rings 9 set at a preset spacing to start working at the same time to achieve pin multiplexing, saving MCU resources. The preset spacing can be set as needed and is not specifically limited here.

[0068] Furthermore, a resonant ring array (resonant ring 9) with a control switch (RF switch 5) is directly loaded on the microstrip transmission line 1 on the upper surface of the dielectric substrate 6. The resonant ring array is a single-layer flexible board that is easily conformal to the metal structure. The resonant ring 9 has a wide resonant ring size detection area and a narrow control area, and an adjustable capacitor 4 is loaded at the opening of the resonant ring 9, thereby achieving miniaturization and frequency reconfiguration. The microstrip transmission line 1, the microstrip antenna 3 and the resonant ring 9 are directly connected to achieve excitation.

[0069] As a further improvement, the energy control mechanism includes an energy acquisition module and a micro control unit connected in sequence; the first end of the radio frequency switch and the second end of the adjustable capacitor are both connected to the micro control unit; the energy acquisition module is used to acquire electromagnetic wave energy signals and perform signal conversion, generate electrical signals and transmit them to the micro control unit; the micro control unit is used to transmit the received electrical signals to the radio frequency switches and adjustable capacitors of each resonant unit group.

[0070] As a further improvement, the microstrip transmission module includes a microstrip antenna and a microstrip transmission line; the microstrip antenna and the microstrip transmission line are symmetrically arranged at both ends of the dielectric substrate and are connected in sequence; the microstrip antenna is communicatively connected to the host computer; a group of microstrip transmission lines is connected to another group of microstrip transmission lines through a plurality of resonant rings connected in sequence; the microstrip antenna is used to obtain electromagnetic wave energy signals and supply energy to each resonant ring through the microstrip transmission line.

[0071] It should be noted that the energy acquisition module 7 obtains electromagnetic wave energy from the external terminal to power the MCU (microcontroller unit 8) and components, and the microstrip antenna 3 obtains electromagnetic wave energy to power the resonant ring 9, thereby achieving the effect of passive detection. The slot antenna (microstrip antenna 3) excited by the microstrip patch is loaded at both ends of the sensing structure (dielectric substrate 6) to achieve inter-sensing integration, and the antenna bandwidth meets the requirements of detecting frequency deviation.

[0072] As a further improvement, the host computer is specifically used to: use preset frequency values ​​to compare with each received resonant frequency point; when any resonant frequency point is less than the preset frequency point value, output the first crack detection result corresponding to the metal to be detected; when each resonant frequency point is greater than or equal to the preset frequency point value, output the second crack detection result corresponding to the metal to be detected.

[0073] It should be noted that when any resonant frequency point is less than the preset frequency point value, the first crack detection result corresponding to the metal to be detected is output, that is, when a resonant frequency point among the resonant frequency points corresponding to all the resonant rings 9 is less than the preset frequency point value, the first crack detection result corresponding to the metal to be detected is output, and the first crack detection result indicates that cracks have appeared in the metal to be detected; if the resonant frequencies corresponding to all the resonant rings 9 are greater than or equal to the preset frequency point value, the first crack detection result corresponding to the metal to be detected is output, and the second crack detection result indicates that no cracks have appeared in the metal to be detected and it is in a healthy state; wherein, the preset frequency point value can be set as needed, for example, the preset frequency point value can be set to 940.6MHz, which is not specifically limited here.

[0074] Exemplarily, the energy acquisition module 7 obtains energy from the external environment (external terminal) to power the MCU (microcontroller unit 8), and the MCU starts working to achieve a passive effect. Wireless transmission is realized through the relay structure and antenna loading. The MCU controls the start and stop of the RF switch to control the working state of the resonant ring and the capacitance of the adjustable capacitor 4 is controlled by voltage to adjust the working frequency of the resonant ring 9, thereby realizing spatial uniform field and spatial reconfiguration of the detection area, solving the problem that traditional electromagnetic resonators cannot perform large-scale crack detection. After adjusting to the corresponding working frequency, the antennas (microstrip antennas 3) at both ends of the sensor realize crack sensing detection by receiving specific electromagnetic waves. At the same time, the MCU activates the control pins in sequence to control the working state of the RF switch (connected or disconnected) to make the resonant ring 9 work, thereby realizing large-scale crack detection.

[0075] Furthermore, by loading the adjustable capacitor 4, not only the size of the sensor is reduced, but also the detection working frequency band can be tuned, so that the sensor can detect fine cracks with a depth of 0.1 mm, improving the detection limit and detection sensitivity. The wireless passive flexible substrate method is used to detect cracks, which removes the limitation of cables and is easy to conform to metals, making the detection process simple and flexible, and helping to reduce the installation and maintenance costs of structural health detection.

[0076] See also Figure 3The figure extracts the distribution of magnetic field strength under the transmission line in a healthy state and when there is a crack. The resonant ring 9 focuses the energy, effectively improving the sensitivity of crack detection. When there is a crack in the metal structure, part of the magnetic field energy of the resonant ring 9 enters the crack, causing the resonant frequency of the resonant ring to shift, which can then characterize the crack.

[0077] For further information, see Figure 4 As the crack depth increases, the resonant frequency of the sensor shifts to a low frequency. When the crack position changes on the resonant unit, groove cracks of different crack depths can be detected and distinguished. This is because the magnetic field on the resonant unit is uniform and has good detection consistency. When in a healthy state, the resonant frequency is 940.6MHz (cracks appear when the value is smaller than this); when the crack depth is 0.1mm, 0.5mm, and 1mm, the resonant frequency shifts to 913.44MHz, 881.72MHz, and 871.04MHz, respectively, and the sensor's detection sensitivity for crack depth is 69.56MHz / mm2. It can be seen that as the crack position changes, the resonant frequency of the sensor hardly shifts, which ensures good detection consistency and eliminates the influence of position factors on crack detection.

[0078] See also Figure 5 When the crack widths are 0.1mm, 0.5mm, and 1mm, the resonant frequencies shift to 931.44MHz, 891.96Mhz, and 871.04MHz, respectively, and the sensor's detection sensitivity for crack width is 69.56MHz / mm2. It can be seen that the sensor has high sensitivity for both crack depth and crack width.

[0079] In an embodiment of the present invention, the present invention provides a metal crack detection device, which includes a dielectric substrate, an energy control mechanism, a host computer, a plurality of resonant unit groups, and microstrip transmission modules symmetrically arranged at both ends of the dielectric substrate; wherein each resonant unit group is arranged at a central position of the dielectric substrate according to a preset spacing, and is connected to the energy control mechanism; a group of microstrip transmission modules is connected to another group of microstrip transmission modules through a plurality of resonant unit groups connected in sequence; the microstrip transmission module is connected to the host computer for communication, and an electromagnetic wave energy signal is obtained through the microstrip transmission module and energy is supplied to each resonant unit group; first, the electromagnetic wave energy signal is obtained through the energy control mechanism and the signal is converted to generate an electrical signal and transmitted to each resonant unit group; then, a magnetic field energy signal is generated based on the received electrical signal through the resonant unit group, and the magnetic field energy signal is used to generate an electromagnetic wave energy signal. The metal to be detected is detected by a signal, a resonant frequency is generated and sent to a host computer through a microstrip transmission module; finally, the host computer obtains and outputs the crack detection result corresponding to the metal to be detected based on multiple resonant frequencies; the above scheme obtains electromagnetic wave energy signals through the microstrip transmission module and supplies power to each resonant unit group, which meets the demand for detecting frequency deviation. At the same time, the electrical signal is input to each resonant unit group through the energy control mechanism, and each resonant unit group is arranged at a central position of the dielectric substrate according to a preset spacing. The metal to be detected is detected by multiple magnetic field energy signals output by each resonant unit group, which realizes passive detection, is not affected by the distribution of the antenna resonant unit field, is not limited to hot spot detection in local areas, realizes spatial reconfiguration of the detection area, and can meet the needs of large-scale crack detection.

[0080] See also Figure 6 , Figure 6 A metal crack detection method is provided in Embodiment 2 of the present invention.

[0081] The present invention provides a metal crack detection method, comprising:

[0082] Step 601: Acquire electromagnetic wave energy signals and perform signal conversion to generate electrical signals.

[0083] In this embodiment, the electromagnetic wave energy signal is acquired and converted into an electrical signal.

[0084] Step 602: Generate multiple magnetic field energy signals based on the electrical signal.

[0085] Further, step 602 may include the following sub-steps:

[0086] S21. Based on the electrical signal, adjust the operating frequency of the resonant ring in each resonant unit group.

[0087] S22. When the operating frequency of each resonant ring reaches a preset frequency threshold, a magnetic field energy signal corresponding to each resonant ring is generated.

[0088] In this embodiment, a plurality of magnetic field energy signals are generated based on the electrical signal.

[0089] Step 603: Use each magnetic field energy signal to perform crack detection on the metal to be detected, and output the crack detection result corresponding to the metal to be detected.

[0090] Further, step 603 may include the following sub-steps:

[0091] S31, using each magnetic field energy signal to perform crack detection on the metal to be detected, and generating a corresponding resonant frequency point;

[0092] S32, using the preset frequency point value to compare with each resonant frequency point respectively, and outputting the crack detection result corresponding to the metal to be detected.

[0093] Further, S32 may include the following sub-steps:

[0094] S321, using preset frequency points to compare with each resonant frequency point respectively;

[0095] S322, when any resonant frequency point is less than a preset frequency point value, outputting a first crack detection result corresponding to the metal to be detected;

[0096] S323. When all resonant frequency points are greater than or equal to the preset frequency point value, output the second crack detection result corresponding to the metal to be detected.

[0097] In this embodiment, each magnetic field energy signal is used to perform crack detection on the metal to be detected, and the crack detection result corresponding to the metal to be detected is output.

[0098] In an embodiment of the present invention, the present invention provides a metal crack detection method, which obtains an electromagnetic wave energy signal and performs signal conversion to generate an electrical signal; based on the electrical signal, generates multiple magnetic field energy signals; uses each magnetic field energy signal to perform crack detection on the metal to be detected, and outputs the crack detection result corresponding to the metal to be detected; the above scheme, through generating multiple magnetic field energy signals based on the electrical signal; using each magnetic field energy signal to perform crack detection on the metal to be detected, compared with the existing process of metal crack detection based on artificial surface plasmon using S parameter amplitude as a detection feature, is not easily affected by external factors, and realizes spatial reconfiguration of the detection area, which can meet the needs of large-scale crack detection.

[0099] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0100] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal crack detection device, characterized in that: The device comprises a dielectric substrate, an energy control mechanism, a host computer, a plurality of resonant unit groups, and microstrip transmission modules symmetrically arranged at two ends of the dielectric substrate; Each of the resonant unit groups is arranged at a central position of the dielectric substrate according to a preset interval, and is connected to the energy control mechanism; One group of the microstrip transmission modules is connected to another group of the microstrip transmission modules through a plurality of the resonant unit groups connected in sequence; The microstrip transmission module is communicatively connected with the host computer, and the microstrip transmission module is used to obtain electromagnetic wave energy signals and supply energy to each of the resonant unit groups; The energy control mechanism is used to obtain the electromagnetic wave energy signal and perform signal conversion, generate an electrical signal and transmit it to each of the resonance unit groups; The resonant unit group is used to generate a magnetic field energy signal based on the received electrical signal, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate a resonant frequency point and send it to the host computer through the microstrip transmission module; The host computer is used to obtain and output the crack detection result corresponding to the metal to be detected based on the multiple resonant frequency points; The resonant unit group includes a radio frequency switch, an adjustable capacitor and a resonant ring; The first end of the radio frequency switch is connected to the energy control mechanism, and the second end of the radio frequency switch is connected to the first end of the adjustable capacitor; The second end of the adjustable capacitor is connected to the energy control mechanism, and the third end of the adjustable capacitor is connected to one end of the resonant ring; The third end of the radio frequency switch is connected to the other end of the resonant ring; One group of the microstrip transmission modules is connected to another group of the microstrip transmission modules through a plurality of the resonant rings connected in sequence; The radio frequency switch is used to respond to the electrical signal and perform a closing operation; The adjustable capacitor is used to adjust the operating frequency of the resonant ring based on the electrical signal transmitted by the energy control mechanism; The resonant ring is used to generate a magnetic field energy signal when the operating frequency reaches a preset frequency threshold, use the magnetic field energy signal to perform crack detection on the metal to be detected, generate a resonant frequency point and send it to the host computer through the microstrip transmission module; The energy control mechanism comprises an energy acquisition module and a micro control unit connected in sequence; The first end of the radio frequency switch and the second end of the adjustable capacitor are both connected to the micro control unit; The energy acquisition module is used to acquire electromagnetic wave energy signals and perform signal conversion, generate electrical signals and transmit them to the micro control unit; The micro control unit is used to transmit the received electrical signal to the radio frequency switch and the adjustable capacitor of each resonant unit group.

2. The metal crack detection device according to claim 1, characterized in that: The host computer is specifically used for: Using preset frequency point values ​​to compare with the received resonant frequency points respectively; When any of the resonant frequency points is less than the preset frequency point value, outputting a first crack detection result corresponding to the metal to be detected; When each of the resonant frequency points is greater than or equal to the preset frequency point value, a second crack detection result corresponding to the metal to be detected is output.

3. The metal crack detection device according to claim 1, characterized in that: The microstrip transmission module includes a microstrip antenna and a microstrip transmission line; The two ends of the dielectric substrate are symmetrically provided with the microstrip antenna and the microstrip transmission line connected in sequence; The microstrip antenna is communicatively connected to the host computer; One group of the microstrip transmission lines is connected to another group of the microstrip transmission lines through a plurality of the resonant rings connected in sequence; The microstrip antenna is used to obtain the electromagnetic wave energy signal and supply energy to each resonant ring through the microstrip transmission line.

4. A metal crack detection method, applied to the metal crack detection device according to any one of claims 1 to 3, characterized in that: include: Acquire electromagnetic wave energy signals and convert them into electrical signals; Based on the electrical signal, generating a plurality of magnetic field energy signals; Each of the magnetic field energy signals is used to perform crack detection on the metal to be detected, and a crack detection result corresponding to the metal to be detected is output.

5. The metal crack detection method according to claim 4, characterized in that: The step of generating a plurality of magnetic field energy signals based on the electrical signal comprises: Based on the electrical signal, adjusting the operating frequency of the resonant ring in each resonant unit group; When the operating frequency of each of the resonant rings reaches a preset frequency threshold, a magnetic field energy signal corresponding to each of the resonant rings is generated.

6. The metal crack detection method according to claim 4, characterized in that: The step of using each of the magnetic field energy signals to perform crack detection on the metal to be detected and outputting the crack detection result corresponding to the metal to be detected comprises: Using each of the magnetic field energy signals to perform crack detection on the metal to be detected, and generating a corresponding resonant frequency point; The preset frequency point values ​​are used to compare with the resonant frequency points respectively, and the crack detection results corresponding to the metal to be detected are output.

7. The metal crack detection method according to claim 6, characterized in that: The step of using the preset frequency point value to compare with each of the resonant frequency points respectively and outputting the crack detection result corresponding to the metal to be detected includes: Using preset frequency points to compare with each of the resonant frequency points; When any of the resonant frequency points is less than the preset frequency point value, outputting a first crack detection result corresponding to the metal to be detected; When each of the resonant frequency points is greater than or equal to the preset frequency point value, a second crack detection result corresponding to the metal to be detected is output.

8. An electronic device, characterized in that: It comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the metal crack detection method as described in any one of claims 4 to 7.

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