TW201918908A - Method for detcting deterioation defect of a strcutural part using structual unit - Google Patents

Abstract

A method for detecting deterioration defect of a structural part using structural units includes the following steps: defining a first base structural unit and obtaining N first base modal parameters related to the first base structural unit; detecting M first subject structural units included in the subject structural part to obtain N first actual modal parameters related each first subject structural units; calculating M*N first subject modal parameters related to the M first subject structural units according to the N first actual modal parameters related to each of the M first subject structural units and M*N pieces of first predetermined ratio information stored in a database; determining whether each first subject structural unit has a deterioration defect or not by comparing the M*N first subject modal parameters to the N first base modal parameters respectively. Each first subject structural unit has the same type as the first base structural unit.

Description

Deterioration detection method for structural components of structural units

The present invention relates to a method for detecting degradation of a structural member, and more particularly to a method for detecting degradation of a structural member using a structural unit.

Industrial pipelines often leak due to anomalies, which ultimately lead to major disasters. In general, the cause of an abnormality in an industrial pipeline may be due to human factors or material degradation of the piping/equipment. Although various manufacturers have developed a monitoring system to reduce the incidence of such disasters. However, this type of monitoring system is based on monitoring process parameters, analyzing operating conditions and performance, and still lacks degradation detection.

The main technical shortcomings of current industrial pipeline safety monitoring are summarized as follows: First, the environmental or process parameter sensors built on the site are used for process monitoring to regulate the production process, and the lack of proper logic judgment analysis safety diagnostic mode. group. Second, there is a lack of monitoring technology for remote sensing degradation. The commonly used non-destructive detection technology is only applicable to the local pipeline location where the sensor is located, and the detection technology of this type can only be sensed when the pipeline rupture fluid escapes. It is not possible to issue an early warning signal when deterioration occurs. Third, the operating environment of the industrial plant varies with the system, structure and components. The sensor must have the durability requirement to overcome the high temperature/high humidity environment and long-term monitoring.

That is to say, due to the limitations of conventional pipeline detection methods and techniques, it is difficult to detect damage or deterioration of the pipeline immediately, thus losing a good opportunity for immediate maintenance and strain. Moreover, since the network constituting the entire pipeline system is usually extremely large, it is also difficult to construct a main cause of detecting a deterioration of the pre-alarm system caused by long-term use of the pipeline. Therefore, in the field of industrial safety, it is necessary to develop diagnostic monitoring related technologies to establish a complete pipeline safety monitoring system.

The invention provides a method for detecting degradation of a structural component using a structural unit, which aims to define an appropriate structural unit and adjust the vibration signal response of the detected structural member to the vibration response of the structural unit corresponding to each region. Deterioration diagnosis is performed separately to achieve the purpose of deterioration monitoring on the entire structural member line.

According to an embodiment of the invention, a method for detecting degradation of a structural component using a structural unit includes disclosing a first basic structural unit and obtaining N first basic modal parameters of the first basic structural unit. Detecting, by the M first sensors disposed on a structure to be tested, respectively, M first structural units to be tested included in the structural component to be tested to obtain N N of each first structural unit to be tested The first actual modal parameter. Each of the first structural units to be tested has the same type as the first basic structural unit. The processor electrically connecting the first sensors is configured according to the N first actual modal parameters of the M first structural units to be tested and the M*N first preset ratio information in the database, Calculating M*N first modal parameters to be tested of the M first structural units to be tested. The processor compares the M*N first modal parameters to be compared with the N first basic modal parameters, respectively, to determine whether each of the first structural units to be tested has a degradation defect. The M*N first preset ratio information is associated with the N first basic modal parameters and the M*N first preset modal parameters.

In summary, in the method for detecting degradation of structural components of the application structural unit of the present invention, the main structural unit is first defined and the basic modal parameters are obtained, and then the structural components to be detected are obtained. The corresponding actual modal parameters of the structural unit are matched with the preset proportion information in the database, and the modal parameters to be tested are used to compare the basic modal parameters, thereby respectively performing degradation detection on each structural unit, and finally achieving The purpose of deterioration monitoring on the whole structural part line.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1 to FIG. 3 together. 1 and 2 are schematic diagrams showing a first basic structural unit and a structural member to be tested, respectively, according to an embodiment of the present invention. FIG. 3 is a flowchart of a method for detecting a degradation of a structural component of a structural unit according to an embodiment of the invention. As shown in the figure, first, in step S301, the first basic structural unit BP0 is defined and a plurality of first basic modal parameters P01 to P05 of the first basic structural unit BP0 are obtained. In practice, for structural parts of various modalities, the modality of the structural member can be identified, and the actual modality of the structural member and the area to be monitored are determined to define the size of the suitable structural unit.

In step S303, the plurality of first sensors 10, 12, and 14 disposed on the structural member TP to be tested respectively respectively detect the first structural unit to be tested TPA~TPC included in the structural member TP to be tested. Obtaining a plurality of first actual modal parameters of each of the first structural units to be tested. In this embodiment, the first structural unit to be tested TPA has a first actual modal parameter PA1~PA5, the first structural unit to be tested TPB has a first actual modal parameter PB1~PB5, and the first structural unit to be tested TPC has The first actual modal parameters PC1~PC5.

In this embodiment, each of the first structural units to be tested has the same type as the first basic structural unit. As shown in FIG. 1 and FIG. 2, the same type means that each of the first structural units to be tested TPA~TPC and the first basic structural unit BP0 are in a straight tube type and have the same size. However, the straight tube type of the above embodiment is for illustrative purposes only, and the invention is not limited thereto. In step S305, the processor 20 electrically connected to the first sensors 10~14 is configured according to the first actual modal parameters PA1~PA5 of the first to-be-tested structural units TPA~TPC, PB1~PB5 and PC1~PC5 and a plurality of first preset ratio information R1~R15 in the database 30, and calculating the first first modal parameters TA1 of the first to-be-tested structural units TPA~TPC ~TA5, TB1~TB5 and TC1~TC5. In step S307, the processor 20 compares the first to-be-tested modal parameters TA1~TA5, TB1~TB5, and TC1~TC5 to the first basic modal parameters P01~P05, respectively, to determine each Whether the first structural unit to be tested has a deterioration defect.

In a practical example, the aforementioned modal parameters may be the characteristic frequencies of the structural units. For example, the first basic modal parameters P01~P05 may include the characteristic frequency of the first basic structural unit BP0. The first actual modal parameters PA1~PA5, PB1~PB5 and PC1~PC5 may respectively contain characteristic frequencies of the first structural unit to be tested TPA~TPC. In practice, the way to obtain the modal parameters can be achieved by the vibration of the structural unit by the exciter and then by the time-frequency domain conversion. In this embodiment, the first preset ratio information R1 R R15 is associated with the first basic modal parameters P01~P05 and the plurality of first preset modal parameters IPA1~IPA5, IPB1~IPB5, and IPC1. ~IPC5. Please refer to FIG. 4, which is a schematic diagram of a plurality of first analog structural units according to an embodiment of the invention. In an embodiment, the method for detecting degradation of the structural component further includes obtaining the first preset modal parameters IPA1~IPA5, IPB1~IPB5, and IPC1 from the plurality of first analog structural units IPA~IPC. ~IPC5, and the first basic modal parameters P01~P05 are respectively separated from the first preset modal parameters IPA1~IPA5, IPB1~IPB5 and IPC1~IPC5, respectively, to obtain the first Preset ratio information R1~R15.

Specifically, the processor 20 divides the first preset modal parameters IPA1~IPA5 with the first basic modal parameters P01~P05 to obtain the first preset ratio information R1~R5, and the first The preset modal parameters IPB1~IPB5 are respectively separated from the first basic modal parameters P01~P05 to obtain the first preset proportion information R6~R10, and the first preset modal parameters IPC1~IPC5 are respectively The first basic modal parameters P01~P05 are divided to obtain the first preset ratio information R10~R15. In practice, the first preset ratio information R1 R R15 is information pre-stored in the database 30, and is mainly used by the processor 20 to compare it with the first actual modal parameters PA1~PA5, PB1. ~PB5 is multiplied by PC1~PC5 to derive the first modal parameters TA1~TA5, TB1~TB5 and TC1~TC5 which are respectively determined by the first structural unit to be tested TPA~TPC. Next, the processor 20 compares the first modal parameters TA1~TA5, TB1~TB5, and TC1~TC5 with the first basic modal parameters P01~P05, respectively. If the first modal parameter to be tested matches the first basic modal parameter, the processor 20 determines that the first preset modal parameter does not have a degradation defect. On the other hand, if the first modal parameter to be tested does not match the first basic modal parameter, the processor 20 determines that the first preset modal parameter has a degradation defect.

In this embodiment, each of the first analog structural units IPA~IPC has the same type as the first basic structural unit BP0. The same type means that each of the first analog structural units IPA~IPC and the first basic structural unit BP0 have the same physical properties, such as a straight tube type and have the same size, density, rigidity and the like. The method for detecting degradation of the structural component provided by the present invention can push back the modal parameter to be measured by using the preset first preset ratio information and the actual modal parameter, and the modal parameter to be measured obtained by the pushback is The basic modal parameters are compared to determine which structural units in the structural member have degradation defects. In other words, any area of the overall structural member can be retrospectively scaled to a simple structural unit state for diagnosis. This diagnostic method can save a large number of custom database establishment, and improve the efficiency and experience sharing of intelligent diagnosis learning. The number of structural units and the number of modal parameters shown in the above embodiments are for illustrative purposes, and the present invention is not limited to the above embodiments.

In an embodiment, the method for detecting degradation of the structural component further includes obtaining the first actual modal parameters PA1~PA5, PB1~PB5, and PC1~ of each of the first structural units to be tested TPA~TPC. Before the preset time ΔT before the PC5, the first preset modal parameters IPA1~IPA5, IPB1~IPB5 and IPC1~IPC5 are respectively obtained from the first to-be-tested structural units TPA~TPC, and the The first basic modal parameters P01~P05 are respectively separated from the first preset modal parameters IPA1~IPA5, IPB1~IPB5 and IPC1~IPC5, respectively, and the first preset proportion information R1~ is obtained. R15. Specifically, the first preset modal parameters IPA1~IPA5, IPB1~IPB5, and IPC1~IPC5 are obtained from the first to-be-tested structural units TPA~TPC at the first time. In the first time point, the first structural unit to be tested TPA~TPC is a structural unit without degradation defects. And at a second time point after a predetermined time ΔT elapses from the first time point, at least one of the first to-be-tested structural units TPA~TPC may have a deterioration defect due to various factors. In other words, different from the first analog structural units IPA~IPC used in the foregoing embodiments, in the embodiment, the first preset modal parameters IPA1~IPA5, IPB1~IPB5, and IPC1~IPC5 are in the first A structural unit to be tested TPA~TPC is obtained before the degradation defect occurs, and the first analog structural units IPA~IPC need not be additionally constructed. Thereby, it is possible to reduce the construction cost and time of the additional analog structural unit.

Please refer to FIG. 5A to FIG. 7 together. 5A is a schematic diagram of a first basic structural unit according to another embodiment of the present invention, and FIG. 5B is a schematic diagram of two basic structural units according to an embodiment of the present invention. FIG. 6 is a schematic diagram of a structural member to be tested according to another embodiment of the present invention. FIG. 7 is a flowchart of a method for detecting a degradation of a structural component of a structural unit according to another embodiment of the present invention. Similar to the foregoing embodiment of FIG. 1 to FIG. 3, in the embodiment of FIG. 5A to FIG. 7, in step S501, the first basic structural unit BP1 (as shown in FIG. 5A) is defined and the first basic structural unit is obtained. A plurality of first basic modal parameters P01'~P05' of BP1. In step S503, the plurality of first sensors 40, 42 and 44 disposed on the structural member TP' to be tested respectively respectively detect the first structural unit to be tested TPA included in the structural member TP' to be tested. '~TPC' to obtain a plurality of first actual modal parameters of each of the first structural units to be tested. In this embodiment, the first structural unit to be tested TPA' has a plurality of first actual modal parameters PA1'~PA5'. The first structure to be tested TPB' has a plurality of first actual modal parameters PB1'~PB5'. The first structure to be tested TPC' has a plurality of first actual modal parameters PC1'~PC5'. In step S305, the processor 50 electrically connected to the first sensors 40-44 is configured according to the first actual modal parameters PA1' of the first to-be-tested structural units TPA'~TPC'. ~PA5', PB1'~PB5' and PC1'~PC5' and a plurality of first preset ratio information R1'~R15' in the database 60, and computing the first structural units to be tested TPA'~TPC 'The first measured modal parameters TA1'~TA5', TB1'~TB5' and TC1'~TC5'. In step S307, the processor 50 compares the first to-be-tested modal parameters TA1'~TA5', TB1'~TB5' and TC1'~TC5' to the first basic modal parameters P01'~ P05', according to whether each of the first structural units to be tested has a deterioration defect.

Different from the foregoing embodiments of FIG. 1 to FIG. 3, the method for detecting degradation of the structural member is further included in step S509, defining a second basic structural unit BP2 (as shown in FIG. 5B) and obtaining the second structure. A plurality of second basic modal parameters P01'~P05' of the unit BP2. In the step S511, the second sensor 46 disposed on the structure TP' to be tested detects the second structure to be tested TPD' further included in the structure to be tested TP' to obtain the second structure to be tested. A plurality of second actual modal parameters PD1'~PD5' of the unit TPD'. In step S511, the processor 50 is configured according to the second actual modal parameters PD1'~PD5' of the second structural unit to be tested TPD' and the plurality of second preset ratio information R16'~R20' in the database 60, A plurality of second modal parameters TD1'~TD5' of the second structural unit to be tested TPD' are calculated. In step S515, the processor 50 compares the second to-be-measured modal parameters TD1'-TD5' to the second basic modal parameters P01'-P05', respectively, to determine the second structural unit to be tested. Whether there is another degradation defect in TPD'.

In practice, the first preset ratio information R1'~R15' is associated with the first basic modal parameters P01'~P05' and the plurality of first preset modal parameters IPA1'~IPA5', IPB1 '~IPB5' and IPC1'~IPC5'. Please refer to FIG. 8. FIG. 8 is a schematic diagram of a plurality of first analog structural units and second simulated structural units according to an embodiment of the invention. In one embodiment, the method for detecting degradation of the structural component further includes obtaining the first preset modal parameters IPA1'~IPA5', IPB1' from the plurality of first analog structural units IPA'~IPC' ~IPB5' and IPC1'~IPC5', and the second preset modal parameters IPD1'~IPD5' are obtained from the second analog structural unit IPD'. The processor 50 divides the first basic modal parameters P01~P05 with the first preset modal parameters IPA1'~IPA5', IPB1'~IPB5' and IPC1'~IPC5', respectively. The first preset ratio information R1~R15 is obtained, and the first basic modal parameters P01~P05 are separated from the IPD1'~IPD5' to obtain the second preset ratios. Information R16~R20. In other words, in this embodiment, the second preset ratio information systems R16'-R20' are associated with the second basic modal parameters P01'-P05' and the second analog structural unit IPD'. A plurality of second preset modal parameters IPD1'~IPD5'.

The second analog structural unit IPD' has the same form as the second basic structural unit BP2, and the second basic structural unit BP2 has a different form from the first basic structural unit BP1. In detail, the second basic structural unit BP2 and the second simulated second simulated structural unit IPD' each have an elbow type, and the first basic structural unit BP1 has a straight tube type. However, the present invention is not limited to the form of the above structural unit. The method for detecting deterioration of a structural member provided by the present invention can be applied to a structural member in which structural units having different types are combined. Steps S301 to S307 shown in FIG. 3 described above are performed on the plurality of structural units included in the structural member to determine which one or which structural units have deterioration defects. However, in practice, if the engineer is to know more clearly the location and extent of the deterioration defects of the structural unit, further judgment is needed.

Therefore, please refer back to FIG. 1 to FIG. 3 . In an embodiment, the method for detecting degradation of the structural component further includes the following steps. When the processor 20 determines that one of the first structural units to be tested TPA~TPC has a degradation defect, the processor 20 will use the actual modal parameters of the first structural unit to be tested with the degradation defect. The first modal parameter data in the database 30 is compared to determine the extent and location of the degraded defect. For example, if the processor 20 determines that the first structural unit to be tested TPB has a degradation defect Def (as shown in FIG. 2), the processor 20 compares the actual modal parameters PB1 P PB5 with the first one in the database 30. Modal parameter data comparison. The first modal parameter data includes a plurality of sets of first modal parameters having different degrees of degradation defects at a plurality of locations in which the first structural unit to be tested TPB having the degradation defect respectively.

Please refer to FIG. 9. FIG. 9 is a waveform diagram of multiple sets of modal parameters in a database according to an embodiment of the present invention. In this embodiment, each first actual modal parameter of the first structural unit to be tested TPB includes an amplitude value of a characteristic frequency (or referred to as a natural frequency), assuming that the first actual modal parameter PB1~PB5 contains characteristics. The frequencies are respectively f1~f5, which correspond to amplitude values V1~V5, respectively. Each set of first control modal parameters MA1~MA5 corresponds to a plurality of first degradation curves, and the degree and position of the degradation defects are determined to include amplitude values of the characteristic frequencies and the first comparison modal parameters of each group respectively. The first degradation curve is compared to determine the extent and location of the degradation defect. Each of the first degradation curves corresponds to a predetermined degradation defect having a deterioration degree value and located at a position of the first structural unit to be tested TPB in which the deterioration defect exists. The reference modal parameters MA1~MA5 are respectively corresponding to the first actual modal parameters PB1~PB5 of the first structural unit to be tested TPB.

In this embodiment, when the processor 20 obtains the amplitude value V1 of the characteristic frequency f1 included in the first actual modal parameter PB1, the amplitude value V1 and the sensor 20 can be used in the first structural unit to be tested. The position set on the TPB finds a corresponding first degradation curve among the plurality of first degradation curves included in the comparison modal parameter MA1 of the plurality of sets of modal parameters in the database 30 shown in FIG. And the position of the deterioration degree of the predetermined degradation defect bit corresponding to the first degradation curve and the position of the first structural unit to be tested TPB is the degree and position of the deterioration defect of the first structural unit to be tested TPB.

The foregoing embodiment of FIG. 9 mainly applies the amplitude values at the same characteristic frequency to compare the extent and position of the deterioration defects of the first structural unit to be tested TPB. In another embodiment, the change in the characteristic frequency can be applied to compare the extent and location of the degradation defect of the first structural unit TPB to be tested. Please refer to FIG. 10 again. FIG. 10 is a waveform diagram of multiple sets of modal parameters in a database according to another embodiment of the present invention. In this embodiment, each first actual modal parameter of the first structural unit to be tested TPB includes a characteristic frequency. For example, the first actual modal parameters PB1 to PB5 include characteristic frequencies of f1 to f5, respectively. And each set of first control modal parameters includes a plurality of second degradation curves, and determining the degree and location of the degraded defects includes the seconds included according to the characteristic frequencies and the first set of modal parameters of the groups The degradation curve obtains at least two sets of degradation estimation parameters respectively. Then, the degree and location of the degradation defect are determined according to the at least two sets of degradation estimation parameters. Described with the embodiment of FIG. 10, FIG. 10 shows two different sets of contrast modal parameters MF1 and MF2, wherein the reference modal parameter MF1 includes a plurality of second degradation curves P1 P P16, and the control modal parameter MF2 contains more Second degradation curves Q1~Q16. Each second degradation curve represents the degree of degradation of different defect lengths and locations at different frequencies.

For example, the second degradation curve Q1 may represent degradation of the first structural unit to be tested TPB when the defect length of the first structural unit to be tested TPB is 50 mm and is located at a 1/8 tube length position at different frequencies. degree(%). As another example, the second degradation curve Q7 may represent the first structural unit to be tested TPB at different frequencies when the defect length of the first structural unit to be tested TPB is 150 mm and is located at a 2/8 tube length position. The degree of deterioration (%). In this embodiment, it is assumed that the first actual modal parameters PB1 and PB2 obtained by the processor 20 respectively correspond to the modal parameters MF1 and MF2 in the database 16, and the first actual modal parameters PB1 and PB2 respectively include Characteristic frequencies f1 and f2. The processor 20 first compares the plurality of second degradation curves P1 P P16 included in the reference modal parameter MF1 in the database 30 shown in FIG. 10 according to the characteristic frequency f1 to find the first structural unit to be tested TPB. The location and extent of possible degradation defects. As shown in FIG. 10, the processor 20 obtains a set of degradation estimation parameters in the comparison modal parameter MF1 including degradation prediction parameters DP1 to DP8. Similarly, the processor 20 obtains a set of degradation prediction parameters in the comparison modal parameter MF2 including the degradation estimation parameters DQ1 D DQ3. The processor 20 can determine the position and extent of possible degradation defects of the first structural unit to be tested TPB according to the degradation estimation parameters DP1 DD DP 8 and the degradation estimation parameters DQ1 DD DQ3. In this embodiment, the processor 20 compares the degradation estimation parameters DP1 to DP8 and the degradation estimation parameters DQ1 to DQ3, and filters out the repeated deterioration estimation parameters, that is, the degradation estimation parameters DQ1 to DQ3. At this time, the processor 14 can know the degree and position of the deterioration defect of the first structural unit to be tested TPB as the degree and position of the deterioration defect corresponding to one of the degradation estimation parameters DQ1 to DQ3.

In one embodiment, the method for detecting degradation of a structural member, wherein each of the actual modal parameters includes a characteristic frequency having a frequency in a first direction and a frequency in a second direction, The method for detecting degradation of the structural member further includes determining a form of the degradation defect according to a frequency in the first direction and a frequency in the second direction. In an embodiment, the step of determining the form of the degradation defect according to the frequency in the first direction and the frequency in the second direction comprises determining whether the frequency of the first direction is consistent with the frequency of the second direction. Next, when the frequency of the first direction and the frequency of the second direction are identical, it is determined that the form of the deterioration defect is a uniform defect. On the other hand, when the frequency of the first direction does not coincide with the frequency of the second direction, it is determined that the form of the deterioration defect is a local defect.

In a practical example, the sensor 12 disposed on the first structural unit to be tested TPB having a degraded defect may be a three-axis accelerometer for detecting frequencies in different directions, such as frequencies in the X-axis direction. The frequency in the direction of the Y axis. Next, the processor 20 determines the form of the deterioration defect of the first structural unit to be tested TPB according to the amount of change in the frequency in the X-axis direction and the frequency in the Y-axis direction, and the form of the degradation defect may be, for example, a uniform defect or It is a local defect. In more detail, in an embodiment, the step of the processor 20 determining the form of the degradation defect according to the frequency in the first direction and the frequency in the second direction comprises determining the frequency of the first direction and the frequency variation of the second direction. Whether the quantity is consistent. When the frequency of the first direction is consistent with the frequency of the second direction, the processor 20 determines that the form of the degradation defect is a uniform defect. On the other hand, when the frequency of the first direction does not coincide with the frequency of the second direction, the processor 20 determines that the form of the degradation defect is a local defect.

In summary, in the method for detecting degradation of structural components of the application structural unit of the present invention, the main structural unit is first defined and the basic modal parameters are obtained, and then the structural components to be detected are obtained. The corresponding actual modal parameters of the structural unit are matched with the preset proportion information in the database, and the modal parameters to be tested are used to compare the basic modal parameters, thereby respectively performing degradation detection on each structural unit, and finally achieving The purpose of deterioration monitoring on the whole structural part line. Furthermore, the degradation detection method of the present invention can be diagnosed by pushing back any region of the overall structural member to a simple structural unit state, thereby saving a large amount of custom database establishment and improving wisdom. Diagnose learning efficiency and experience sharing.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10~14, 40~42‧‧‧ first sensor

46‧‧‧Second sensor

20, 50‧‧‧ processor

30, 60‧‧ ‧ database

BP0, BP1‧‧‧ first basic structural unit

BP2‧‧‧Second basic structural unit

IPA~IPC, IPA’~IPC’‧‧‧ first analog structural unit

IPD’‧‧‧Second analog structural unit

TP‧‧‧ structural parts

Def‧‧‧Deterioration defect

TPA~TPC, TPA’~TPC’‧‧‧ first structural unit to be tested

TPD’‧‧‧second structural unit to be tested

DP1~DP8, DQ1~DQ3‧‧‧ Deterioration estimation parameters

MF1, MF2, MA1~MA5‧‧‧ contrast modal parameters

P1~P16, Q1~Q16‧‧‧Second degradation curve

FIG. 1 is a schematic diagram of a first basic structural unit according to an embodiment of the invention. 2 is a schematic view of a structural member to be tested according to an embodiment of the invention. FIG. 3 is a flow chart of a method for detecting a degradation of a structural component of a structural unit according to an embodiment of the invention. 4 is a schematic diagram of a plurality of first analog structural units according to an embodiment of the invention. FIG. 5A is a schematic diagram of a first basic structural unit according to another embodiment of the present invention. FIG. 5B is a schematic diagram of a second basic structural unit according to an embodiment of the invention. FIG. 6 is a schematic diagram of a structural member to be tested according to another embodiment of the present invention. FIG. 7 is a flow chart of a method for detecting a degradation of a structural component of a structural unit according to another embodiment of the present invention. FIG. 8 is a schematic diagram of a plurality of first analog structural units and second simulated structural units according to an embodiment of the invention. FIG. 9 is a waveform diagram of a plurality of sets of modal parameters in a database according to an embodiment of the present invention. FIG. 10 is a waveform diagram of a plurality of sets of modal parameters in a database according to another embodiment of the present invention.

Claims (9)

A method for detecting degradation of a structural component of a structural unit includes: defining a first basic structural unit and obtaining N first basic modal parameters of the first basic structural unit; and being disposed on a structural component to be tested The M first sensors respectively detect the M first structural units to be tested included in the structural component to be tested, so as to obtain N first actual modal parameters of each of the first structural components to be tested. Each of the first structural unit to be tested has the same type as the first basic structural unit; a processor electrically connecting the first sensors is based on the N of the M first structural units to be tested The first actual modal parameter and the M*N first preset ratio information in a database, and the M*N first modal parameters to be tested of the M first structural units to be tested are calculated; The processor compares the M*N first modal parameters to be tested to the N first basic modal parameters, respectively, to determine whether there is a degradation in each of the M first structural units to be tested. a defect; wherein the M*N first preset ratio information is associated with the N first basic mode parameters Number and M*N first preset modal parameters. The method for detecting degradation of a structural component according to claim 1, further comprising: obtaining the M*N first preset modal parameters from the M first analog structural units; and the N first basic modes The state parameter is separately divided by the M*N first preset modal parameters, thereby obtaining the M*N first preset ratio information; wherein each of the first analog structural unit and the first basic The structural units have the same type. The method for detecting degradation of a structural component according to claim 1, further comprising: before obtaining a preset time before the N first actual modal parameters of each of the first structural components to be tested, Obtaining the M*N first preset modal parameters on the first structural unit to be tested; and dividing the N first basic modal parameters and the M*N first preset modal parameters separately According to the data, the M*N first preset ratio information is obtained. The method for detecting degradation of a structural member according to claim 1, further comprising: defining a second basic structural unit and obtaining N second basic modal parameters of the second basic structural unit; a second sensor on the device detects a second structural unit to be tested further included in the structural component to be tested, to obtain N second actual modal parameters of the second structural unit to be tested; Calculating N second test modes of the second structural unit to be tested according to the N second actual modal parameters of the second structural unit to be tested and N second preset ratio information in the database And determining, by the processor, the N second modal parameters to be compared with the N second basic modal parameters, respectively, determining whether the second structural component to be tested has another degradation defect; The N second preset ratio information is associated with the N second basic modal parameters and the N second preset modal parameters obtained on a second simulated structural unit, and the second simulated structural unit Having the same form as the second infrastructure unit, and the second base knot Units having different morphology and the first infrastructure element. The method for detecting degradation of a structural component according to claim 1, further comprising: when the processor determines that the degradation defect exists in one of the M first structural units to be tested, the processor will have the degradation defect The N first actual modal parameters of the first structure to be tested are compared with a first modal parameter data in the database to determine the degree and location of the degradation defect; wherein the first mode The parameter data includes N sets of first contrast modal parameters of the first structural unit to be tested in which the degradation defect has different degrees of deterioration defects at a plurality of locations. The method for detecting degradation of a structural member according to claim 5, wherein each of the first actual modal parameters of the first structural unit to be tested in which the degradation defect exists includes an amplitude value of a characteristic frequency, and each group The first contrast modal parameter corresponds to the plurality of first degradation curves, and the degree and the position of the deteriorated defect are determined to include the amplitude values of the characteristic frequencies and the first degradation curves of each set of first contrast modal parameters respectively Aligning, determining the degree and location of the degradation defect; wherein each of the first degradation curves corresponds to a formulation having a degree of deterioration value and located at a position of the first structural unit to be tested in which the degradation defect exists Deterioration defects. The method for detecting degradation of a structural member according to claim 5, wherein each of the first actual modal parameters of the first structural unit to be tested in which the degradation defect is present comprises a characteristic frequency, and each group of first comparison modes The state parameter includes a plurality of second degradation curves, and determining the degree and location of the degradation defect includes: obtaining at least two according to the characteristic frequencies and the second degradation curves included in the first comparison modal parameters of the groups a group deterioration estimation parameter; and determining a degree and a position of the deterioration defect according to the at least two sets of deterioration estimation parameters. The method for detecting degradation of a structural member according to claim 5, wherein each of the first actual modal parameters of the first structural unit to be tested in which the degradation defect exists includes a characteristic frequency, and the characteristic frequency has a first The frequency detecting in one direction and the frequency in a second direction, the method for detecting degradation of the structural member further comprises determining a form of the degraded defect according to a frequency in the first direction and a frequency in the second direction. The method for detecting degradation of a structural member according to claim 8, wherein the step of determining the form of the degradation defect according to the frequency in the first direction and the frequency in the second direction comprises: determining the first direction Whether the frequency is consistent with the frequency of the second direction; when the frequency of the first direction is consistent with the frequency of the second direction, determining that the form of the degradation defect is a uniform defect; and when the frequency of the first direction When the frequency in the second direction does not coincide, it is determined that the form of the deterioration defect is a local defect.