Diagnosis system, and diagnosis method

Abstract

To provide a diagnosis system that solves the problem, in which in checking looseness of a bolt fastening part of a conductor connecting an inter-board such as a distribution panel and the like, a conventional method takes a huge amount of time and labor to re-tighten all fastening parts, and further, during a period of turning on power, the re-tightening cannot be carried out because of contact with the bolt.SOLUTION: A diagnosis system comprises: oscillation means that non-contactly applies oscillation to a first conductor supplying power to a load; measurement means that non-contactly measures the oscillation given to the first conductor by the oscillation means, and oscillation after transmitted to a second conductor fastened to the first conductor by a prescribed fastening member, respectively; a diagnostic information generation unit that acquires information on the measured oscillation of the first conductor by the measurement means, and information on the oscillation after transmitted to the second conductor, and generates diagnostic information for diagnosing a fastening part by the fastening member; and a diagnosis unit that, when the diagnostic information satisfies a prescribed condition about abnormality of the fastening part, diagnoses that the abnormality is present in the fastening part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Embodiments of the present invention relate to diagnostic systems and methods. [Background technology]

[0002] In order to protect the equipment at substation facilities, regular maintenance and inspection work and condition monitoring are carried out. One of the inspection items is to check for loose bolt fastenings of conductors connecting panels such as switchboards and distribution boards. This is because when the bolted joint loosens, the contact resistance of the conductor connection increases, causing an increase in electrical resistance. This is because the flow of current through the joint may cause it to overheat and result in an accident such as burning.

[0003] Conventionally, the method used to inspect bolt fastenings has been to retighten all fastenings. In this case, retightening refers to tightening the bolts to the specified torque. This is a procedure to check whether any loosening has occurred.

[0004] In addition, a method is also used to detect loosening of bolt fastenings by applying vibration to the conductor. This is because the vibration characteristics of the conductor under normal conditions that is the object of detection are acquired in advance, and the vibration characteristics during maintenance and inspection are By comparing the characteristics, it is possible to detect loosening of bolt fastenings.

[0005] In addition, Patent Document 1 describes a technology for diagnosing loosening of bolt fastening parts of multiple continuously connected conductors. One end of the connected conductors is physically vibrated with a hammer or the like, and the vibration is measured at the other end. A method is proposed to diagnose the state of loosening of bolt fastenings by comparing the vibration characteristics of multiple conductors. It has been proposed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-201220 A Summary of the Invention [Problem to be solved by the invention]

[0007] The conventional method of tightening all fastening parts described above requires a huge amount of time and effort, and is difficult to operate. There was a problem that the bolts could not be tightened further when electricity was applied because the worker would come into contact with them. .

[0008] In addition, in the method of applying vibration to the conductor, the vibration characteristics of the conductor under normal conditions to be inspected must be determined in advance. There was a problem that needed to be addressed.

[0009] Furthermore, in the method of Patent Document 1, a contact type vibration device and a vibration sensor are used for vibration application. When high voltage is applied to the conductor, there is a risk of a ground fault, making diagnosis difficult. There were also problems with the work not being carried out and the area not being suitable for continuous monitoring. When diagnosing an abnormality in the conductor joint, it is necessary to compare it with other conductors. There was also the problem that the work was complicated because a diagnosis was required. [Means for solving the problem]

[0010] In order to solve the above problem, the diagnostic system of the embodiment is a a vibration applying means for applying vibration to a first conductor in a non-contact manner; and a second conductor fastened to the first conductor by a predetermined fastening member. A measuring means for measuring the vibration after the vibration is transmitted to the sensor without contact, and a measuring means for measuring the vibration after the vibration is transmitted to the sensor without contact. The information on the vibration of the first conductor measured and the information on the vibration after being transmitted to the second conductor are collected. and diagnosing whether or not there is an abnormality in the fastening portion by the fastening member from the vibration information. a diagnostic information generating unit for generating diagnostic information; and When a predetermined condition regarding an abnormality in the fastening portion is satisfied, the fastening portion is diagnosed as having an abnormality. A diagnostic unit.

[0011] In the diagnostic method of the embodiment, the diagnostic unit is configured to apply a vibration to a first conductor that supplies power to the load. applying vibration to the first conductor by the vibration applying means in a non-contact manner; The information on the vibration transmitted to the second conductor fastened to the first conductor by a predetermined fastening member is then transmitted to the second conductor. The information on the vibration after transmission is measured non-contact from the first conductor and the second conductor, respectively. a step of measuring the vibration; and a diagnostic information generating unit generating a diagnostic information based on the measured vibration information. When the cutoff information satisfies a predetermined condition regarding an abnormality of the fastening portion by the fastening member, It is diagnosed that there is an abnormality in the part. [Brief description of the drawings]

[0012] [Figure 1] Diagram of the diagnosis system according to the first embodiment [Diagram 2] Layout image of the vibration device and the measurement device according to the first embodiment [Diagram 3] A detailed arrangement diagram of vibration positions and measurement positions according to the first embodiment. [Figure 4] System flow chart according to the first embodiment [Diagram 5] Diagnostic waveform examples [Figure 6] Layout image of the vibration device and the measurement device according to the second embodiment [Figure 7] Layout image of the vibration device and the measurement device according to the third embodiment [Figure 8]1A and 1B are views showing the relationship between the arrangement of a vibration device and a measurement device and a three-view diagram of a conductor 11A according to a first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (First embodiment) A first embodiment of the invention will now be described with reference to the drawings.

[0014] FIG. 1 shows the configuration of the diagnostic system according to this embodiment. FIG. 2 is a schematic diagram of the arrangement of the vibration positions and the measurement positions according to this embodiment, and FIG. 3, a system flowchart according to this embodiment is shown in FIG.

[0015] The diagnostic system according to this embodiment includes a vibration exciter that applies vibration to a conductor 11 as shown in FIG. The vibration of the conductor 11 is measured by a measuring device 13, which is a measuring means for measuring the vibration of the conductor 11. The diagnostic device 10 acquires information on vibrations measured by a measuring device 13. and a communication unit for diagnosing an abnormality in a fastening portion based on vibration information acquired by the communication unit. A diagnostic information generating unit 15 generates diagnostic information for the purpose of a diagnosis unit 16 for diagnosing an abnormality in the fastening portion based on the obtained diagnosis information; and an output unit for outputting a diagnosis result. The device is provided with a section 17.

[0016] FIG. 2 shows a vibration device 12 and a measurement device for detecting loosening of a fastening portion in this embodiment. 2 is an image diagram showing a specific example of the arrangement of conductor 13. 1A to 11E are fastened and connected by fastening portions 31A to 31D, respectively, to form a series of conductors. Both ends of the conductor 11 (one end of the conductor 11A which is a first conductor and one end of the conductor 11B which is a second conductor) are The ends of the body 11E are fixed by the fixing parts 32A and 32B, respectively. As shown in FIG. 2, conductor 13 is located near a vibration position where vibration is applied by vibration device 12. A measuring device 13A for measuring the vibration of conductor 11A and a measuring device 14A for measuring the vibration of conductor 11E in the vicinity of fixed portion 32B. This constitutes measuring device 13B.

[0017] FIG. 3 is a view of the conductor 11 in FIG. 2 as seen from the direction in which the vibration device 12 is installed (the fixed part and the fastening part are (not shown) is the position to be vibrated by the vibration device 12 in this embodiment. Vibration position a, measurement positions b and b′ measured by measuring devices 13A and 13B, respectively, The fastening holes 52 to 55 used for the fastening parts 31A to 31D, respectively, and the fixing parts 32A and 32B 4 shows the relative positions of the fixing portion holes 51, 56 used respectively.

[0018] The conductors 11A to 11E are devices such as circuit breakers, disconnectors, current transformers, or voltage transformers (none of which are shown in the figure). ) is used to supply power to factory equipment and building facilities. The conductors are connected to the loads such as the loads 10 and 11, respectively, by fastening portions 31A to 31D. The conductors 11A to 11E are made of a material such as copper or aluminum, and are covered with an insulator such as resin. In some cases, this is also the case.

[0019] Industrial power equipment often uses three-phase, three-wire AC, but all three wires have the same structure. In this embodiment, only one of the three strings will be described with reference to FIG. In addition, power equipment can be connected to any power line that supplies power, regardless of whether it is three-phase or single-phase. The device may be such a device.

[0020] As shown in FIG. 2, the conductors 11A to 11E are connected to form a series of conductors. 11A to 11E are fastened by fastening parts 31A to 31D which are bolts and nuts ( In the figure, the fasteners, ie, bolts, nuts, and fastening parts are collectively shown as fastening parts 31A to 31D. One end of the conductor 11A and one end of the conductor 11E are fixed to fixing parts 32A and 32B, respectively. The fixing parts 32A and 32B are, for example, insulators that stably hold the conductors. Conductors 11A and 11E can be prevented from being electrically connected to structures, etc. (insulated). This makes it possible to prevent leakage of electricity and short circuits.

[0021] The vibration device 12 is a vibration device capable of applying vibration to the conductor 11A, which is the first conductor, in a non-contact manner. For example, a laser irradiation device is used to irradiate the conductor 11A with a laser. Vibrations can be applied by laser ablation. This means that the surface of the target is melted and evaporated by laser irradiation, which causes instantaneous excitation. Laser ablation allows the device to be placed several meters away. Vibration is possible, and it can be applied even in places where it is difficult to approach the equipment to be vibrated. .

[0022] In the method using laser ablation, the conductor 11A to be excited is directly Since it is necessary to irradiate a laser, there is no obstacle between the vibration device 12 and the conductor 11A. In principle, it is necessary to arrange the vibrator 12 so that the conductor 11A is not disturbed. If not, it is possible to change the laser irradiation angle by reflecting it using a mirror. In addition, when the conductor 11A is in a state where the metal is exposed, the laser reflection occurs on the surface of the conductor. Since there is a possibility of projection, prior surface treatment such as by coarse abrasive grinding is required.

[0023] In the example shown in FIG. 2 of this embodiment, vibration is applied to the conductor 11A, and the first conductor in the vicinity of the vibration application position Vibration of a certain conductor 11A and the conductors 11A to 11E and the fastening parts 31A to 31D after being transmitted The vibration of the second conductor, conductor 11E, is measured. For this purpose, measuring device 13A and measuring device 1 3B are disposed so as to sandwich the fastening parts 31A to 31D. The vibrations measured here are, for example, , the absolute value of the amplitude, the vibration velocity or the vibration acceleration, or frequency analysis The natural frequency may be a natural frequency determined by the vibration source.

[0024] In this embodiment, as shown in FIG. 3, a conductor 11A is vibrated by a vibration device 12. The vibration position a is a position between the fixing hole 51 through which the bolt of the fixing part 32A is inserted and the bolt of the fastening part 31A. The hole 51 is placed between the fastening hole 52 through which the bolt is inserted and in the vicinity of the fixing hole 51. The measurement position b where the vibration of the conductor 11A is measured by the device 13A is the bolt of the fastening portion 31A. between the fastening portion hole 52 through which the bolt of the fixing portion 32A is inserted and the fixing portion hole 51 through which the bolt of the fixing portion 32A is inserted. This is to improve the diagnostic accuracy of the diagnostic device 10. The vibration applied by the vibration applying device 12 is measured by the measuring device 13A. This is why.

[0025] The measurement position b′ where the vibration of the conductor 11E is measured by the measuring device 13B is the fastening portion 31D. The fastening portion hole 55 through which the bolt of the fixing portion 32B is inserted and the fixing portion hole 5 through which the bolt of the fixing portion 32B is inserted. 6 and in the vicinity of the fixing hole 56. After being applied by the device 12 and transmitted to the conductors 11A to 11E and the fastening portions 31A to 31D, This is to measure vibrations.

[0026] The above-mentioned vibration device 12, measuring devices 13A, 13B, fastening parts 31A to 31D and fixing part 3 The relative positions of 2A and 32B will be described in detail with reference to FIG.

[0027] The conductors 11A to 11E are connected by fastening portions 31A to 31D to form a continuous conductor. As shown in FIG. 3, if the fixing portion and the fastening portion are not shown, the conductor 11A and the conductor 11E are not connected. The wire is provided with holes 51 and 56 for fixing the wires to fix the wires. Furthermore, fastening holes 52 to 55 for installing fastening parts are provided in each conductor.

[0028] The excitation position a, which is the irradiation position of the laser emitted from the excitation device 12, is fixed as described above. In the vicinity of the fixing hole 51, if the conductor 11A is a rectangular parallelepiped, the widest It is provided on the surface.

[0029] The measurement position b, which is the measurement position of the vibration measured by the measuring device 13A, is as described above. If the conductor 11A is a rectangular parallelepiped like the vibration position a, the conductor It is provided at the widest area of ​​11A.

[0030] The measurement position b', which is the measurement position of the vibration measured by the measuring device 13B, is as described above. As shown in FIG. 1, the conductor 11E is a rectangular parallelepiped in the vicinity of the fixing hole 56, similar to the measurement position b. and is provided on the surface of the conductor 11E having the largest area.

[0031] More specifically, FIG. 8 shows a three-sided view of the conductor 11A. The conductor 11A is connected to a bolt, nut, and In many cases, the fixing portion 31 is formed in a flat plate shape so that it can be firmly fixed by the fastening portion 31A. In the case of a flat conductor 11A as shown in FIG. 8, a fixing hole 51 and a fastening hole 52 are formed. The vibration device 12 is arranged so that it can vibrate a large surface that is covered with the material. It is also preferable that the measuring device 13 is designed to measure the vibration of the surface of the flat plate with the widest area. It is preferable to place it in

[0032] For example, if the cross section of the conductor 11A is a rectangular parallelepiped rather than a square, the narrowest side Even if vibration is applied to the surface of the conductor 11A by the vibration device 12, the vibration of the conductor 11A itself is clearly observed. Similarly, for example, when the fastening portion 31A is a bolt and a nut, In this case, it is desirable to irradiate the laser in the same direction as the axial direction of the bolt. This is because the bolt loosening detection is highly effective when the strongest vibration component is generated in the direction perpendicular to the axis of rotation.

[0033] The conductor 11A is not necessarily configured as a flat plate, but may have a circular cross section. Even if the shape is flat, only the ends are rolled to make them easier to fasten with bolts and nuts. If the surface is flattened, vibration should be applied to the large surface of the flattened surface, and the large surface should be It is preferable to arrange the vibration device 12 and the measurement device 13 so as to measure the vibration of the stacked surface. .

[0034] The measuring devices 13A and 13B are non-contact type similar to the vibration device 12, and measure the conductors 11A and 1 The measuring devices 13A and 13B are devices capable of measuring the vibration of the object 1E. Laser Doppler type is a measuring device that measures the vibration of the measurement object. This is a measurement method that measures the absolute value of vibration from the change in the optical path length of a laser irradiated on a target. The measuring devices 13A and 13B may be eddy current sensor type measuring devices. The coil placed near the conductor generates a high-frequency magnetic field, which induces eddy currents in the metal being measured. When a current is generated, the absolute value of the distance (vibration) is measured by the change in impedance of the sensor coil. This is a measurement method to determine the

[0035] Similarly to the vibration device 12, the measurement surfaces of the measurement devices 13A and 13B are the conductors 11A and 11B. It is desirable that the surface having the widest area in 11E be the surface having the widest area in the measurement direction. It is desirable to measure in the same direction as the axial direction of the bolts which are the connections 31A to 31D.

[0036] In addition, the measuring devices 13A and 13B also have a function of transmitting the measured vibration to the diagnostic device 10. 1.

[0037] The communication unit 14 of the diagnostic device 10 communicates with an external communication device via a network. For example, wireless LAN (Local Area Network), wired LAN, Blue Communication methods such as tooth (registered trademark) or LTE (Long Term Evolution) (registered trademark) In the diagnostic system according to the embodiment, the measuring devices 13A and 13B may communicate with each other. The measured vibration information is obtained through communication.

[0038] The diagnostic information generating unit 15 generates diagnostic information based on the measured vibration information. The diagnostic information generating unit 15 receives the vibrations from the measuring devices 13A and 13B via the communication unit 14. The diagnostic information generating unit 15 generates diagnostic information based on the acquired vibration information. The diagnostic information is used to diagnose whether or not there is an abnormality in any of the conductor fastening portions 31A to 31D. This information is used to make decisions.

[0039] The diagnostic information generating unit 15, for example, generates information in which the vibration acceleration and the frequency are associated with each other as diagnostic information. The vibration acceleration measured by the measuring device 13A and the vibration acceleration measured by the measuring device 13B are calculated. The vibration transmissibility obtained based on the vibration acceleration measured by the As a specific example of the vibration transmissibility, the vibration acceleration measured by the measuring device 13B is The acceleration ratio is calculated (generated) by dividing the acceleration by the vibration acceleration measured by the measuring device 13A. be.

[0040] The diagnosis unit 16 determines whether the fastening portions 31A to 31D are in good condition based on the diagnosis information generated as described above. Specifically, for example, the conductors 11A to 11E are fastened, and a diagnosis is made as to whether or not there is an abnormality in any of them. If any of the fastening parts 31A to 31D loosens, the transmission of vibration between the conductors 11A to 11E will be impaired. The vibration measured by the measuring device 13B is that the fastening portions 31A to 31D are normal. As a result, the vibration of the above-mentioned diagnostic information is attenuated more than when the The transmission rate is smaller than that when the fastening portions 31A to 31E are normally fastened. 6, the change in the transmissibility of vibration due to the attenuation of such vibration is set as a predetermined condition, and the fastening portion 31 Diagnose any abnormality in A to 31D.

[0041] Moreover, the diagnosis unit 16 outputs the diagnosis result to the output unit 17. The diagnosis result is 31D includes information indicating whether there is an abnormality in any of the

[0042] Furthermore, the diagnosis unit 16 transmits the diagnosis result to an external communication device via the communication unit 14. The diagnosis unit 16 may receive the notification by, for example, email, SMS (Short Message Service) or mail. The diagnosis result may be transmitted using a predetermined communication means such as a messenger. The diagnostic unit 16 stores in advance the communication means and the destination to which the diagnostic results are to be sent.

[0043] The output unit 17 outputs data to a user of the diagnostic device 10. The output unit 17 is, for example, For example, the output unit 17 may be configured using a device that outputs images and characters to a screen. , CRT (Cathode Ray Tube), LCD display, and OLED (Electro Luminescence) The output unit 17 can be configured using a display or the like. In addition, the output unit 17 can be configured to print images and characters on a sheet ( For example, an inkjet printer or a laser printer may be used. It can be configured using a printer or the like.

[0044] Moreover, the output unit 17 may be configured using a device that converts characters into voice and outputs the voice. In this case, it can be configured using a voice synthesizer and a voice output device (speaker).

[0045] Furthermore, the output unit 17 is configured using a light-emitting device such as an LED (Light Emitting Diode). The output unit 17 may output information to other information processing devices via a communication unit 14 provided in the diagnostic device 10. The result of the determination may be transmitted to a user of the device. The user may, for example, The inspector may also be an inspector who performs inspections of the equipment.

[0046] The control unit 20 controls the operation of each unit of the diagnostic device 10. The control unit 20 includes, for example, a CPU ( Equipped with a processor such as a Central Processing Unit (Central Processing Unit) and RAM (Random Access Memory) The control unit 20 executes the diagnostic program to obtain diagnostic information. It functions as an information generating unit 15 and a diagnosing unit 16.

[0047] Next, a system flowchart of the diagnostic method according to this embodiment will be described with reference to FIG. do.

[0048] FIG. 4 is a flowchart showing the process of diagnosing an abnormality in the fastening portions 31A to 31D of this embodiment. The diagnosis of the conductor fastening part is performed at a predetermined timing. This may be at the timing of regular maintenance of the conductor fastening portion, or when an abnormality occurs in the conductor fastening portion. It may be the timing at which the

[0049] First, the user checks whether the laser emitted from the vibration device 12 strikes the conductor 11 near the fixed portion 32A. The vibration device 12 is placed so as to be irradiated onto the conductor 11A without contacting the conductor 11A (step S1 01).

[0050] Next, the user measures the conductor near the laser irradiation position (excitation position) irradiated by the excitation device 12. A measuring device 13A is disposed in a non-contact manner with the conductor 11A so as to measure the vibration of the conductor 11A. In addition, the user may measure the vibration of the conductor 11E in the vicinity of the fixed portion 32B. The measuring device 13B is placed in a non-contact manner with the vibration device 12 and the The measuring devices 13A and 13B do not have to be installed each time a measurement is performed, but may be installed all the time. This is because, when installing on a case-by-case basis, if the conductor is live, the installer is at risk of electric shock. Because of this risk, it is preferable to have it installed at all times in order to measure with the power on. be.

[0051] Next, the vibration device 12 applies vibration to the conductor 11A in a non-contact manner (step S103). As described above, the vibration device 12 is a laser irradiation device in this embodiment.

[0052] The measuring device 13A measures the vibration applied to the conductor 11A by the vibration excitation device 12. The device 13B is a device for connecting the conductor 11E after the conductors 11A to 11E and the fastening portions 31A to 31D are connected to each other. The vibration is measured (step S104).

[0053] The diagnostic information generating unit 15 receives the respective vibrations from the measuring devices 13A and 13B via the communication unit 14. The vibration information is acquired (step S105), and diagnostic information is generated based on the acquired vibration information. The diagnostic information in this embodiment is, for example, the transmissibility of vibration. The vibration acceleration measured by the measuring device 13B is measured by the measuring device 13A. The acceleration ratio is calculated (generated) by dividing the measured vibration acceleration by the measured vibration acceleration.

[0054] The diagnosis unit 16 determines whether any of the fastening portions 31A to 31D has an abnormality based on the diagnosis information. For example, the vibration transmission information generated by the diagnostic information generating unit 15 is diagnosed (step S107). When the rate is 70% or less, it is diagnosed as abnormal. When it is diagnosed as abnormal (step If the answer is YES in step S107, the diagnosis unit 16 determines that there is an abnormality in any of the fastening units 31A to 31D. The diagnosis result indicating that there is no abnormality is output to the output unit 17 (step S108). If the result of step S107 is NO, the diagnosis unit 16 determines whether any of the fastening units 31A to 31D is A diagnosis result indicating that there is no abnormality (normality) is output to the output unit 17 (step S1 09).

[0055] Here, FIG. 5 is a diagram showing a specific example of a diagnostic waveform. When a predetermined condition is satisfied, the diagnostic unit 16 If the above condition is satisfied, it is determined that there is an abnormality in any of the fastening portions 31A to 31D. In FIG. 5, the vertical axis shows the vibration acceleration ratio and the horizontal axis shows the frequency. Graph 1 shows the results when the fastening part is properly fastened, and graph 2 shows the results when the fastening part is loose. The displayed vibration acceleration ratio is an index value that is the ratio of the input and output of the analysis frequency band. Since it is calculated by dividing the output vibration acceleration by the input vibration acceleration, the index value is the vibration of each frequency. The smaller the index value on the vertical axis, the greater the output power relative to the input vibration acceleration. This means that the rate of vibration acceleration is decreasing, that is, the vibration is damped.

[0056] As shown in graph 2 in FIG. 5, when any of the fastening portions 31A to 31D is fastened, If there is an abnormality such as a defect or looseness, the index value of any frequency band will decrease significantly. Based on the index value, which is the diagnostic information, the diagnosis unit 16 determines whether the fastening units 31A to The presence or absence of any abnormality in any of the 31D is diagnosed. Figure 5 shows Graph 1, which shows the state when the screw is normally fastened. However, this is the result of measurements taken to check for loosening of fastening parts during on-site construction, for example. These are not the measurement results for conductors not subject to inspection. In the previous paper, the vibration acceleration was used to calculate the index value, but the amplitude or vibration velocity may also be used. The index value is not limited to the form in which the output vibration is divided by the input vibration.

[0057] In this embodiment, the four fastening portions 31A to 31D are connected to the two measuring devices 13A and 13B. However, the present invention is not limited to this configuration. For example, the measuring device 13A , 13B, four or more fastening parts may be sandwiched between them, or only one fastening part may be sandwiched between them.

[0058] In addition, if measuring devices are placed so that each fastening part is sandwiched between them, the presence or absence of abnormalities in each fastening part can be detected. It is also possible to diagnose the absence of any abnormality, making it possible to more accurately identify the fastening portion having an abnormality.

[0059] Furthermore, the diagnostic device 10 includes a plurality of information processing devices connected to each other so as to be able to communicate with each other via a network. In this case, each functional unit of the diagnostic device 10 may be implemented using a plurality of For example, the diagnostic information generating unit 15 and the diagnostic unit 16 may be implemented in an information processing device. may be implemented in different information processing devices.

[0060] In each of the above embodiments, the diagnostic information generating unit 15 and the diagnostic unit 16 are software functional units. However, it may be a hardware function unit such as an LSI.

[0061] As described above, according to this embodiment, the following effects can be obtained.

[0062] Using a non-contact vibration device and a measurement device, vibration is applied to the conductor and the transmissibility of the vibration is calculated. As a result, it is possible to detect the vibration characteristics of the conductor under normal conditions without acquiring them in advance. It is possible to easily diagnose abnormalities in conductor fastenings even when the conductor is energized without comparing it with other conductors. It can be decided.

[0063] Second embodiment Next, a diagnostic system according to a second embodiment will be described below.

[0064] The diagnostic system according to this embodiment will be described with reference to FIG. The diagnostic system in the second embodiment differs from that in the first embodiment in part of its configuration. The same components as those in the diagnostic system according to the first embodiment are denoted by the same reference numerals as those in the first embodiment. Therefore, the explanation will be omitted.

[0065] The diagnostic system in this embodiment differs from the first embodiment in the vibration method of the vibration device 61. It is something.

[0066] In this embodiment, the vibration method by laser irradiation of the vibration device 61 is laser irradiation induction. The laser irradiation induced plasma is generated near the surface of the object to be excited. Plasma is generated by placing a laser focus nearby, creating shock waves that vibrate the target. In this method, as in the case of laser ablation, there is no obstacle between the vibration device 61 and the conductor 11A. In principle, it is necessary to arrange the vibrator 61 so that there are no obstacles between the vibrator 61 and the conductor 11A. If the damage cannot be eliminated, the laser irradiation angle is changed by reflecting it using a mirror. It is also possible.

[0067] As described above, according to this embodiment, the following effects can be obtained.

[0068] Compared to laser ablation, the target is not directly melted or evaporated, so the ablation is not applied to the conductor. It is possible to apply vibration without leaving any traces.

[0069] (Third embodiment) Next, a diagnostic system according to a third embodiment will be described below.

[0070] The diagnostic system according to this embodiment will be described with reference to FIG. The diagnostic system in the second embodiment differs from that in the first embodiment in part of its configuration. The same components as those in the diagnostic system according to the first embodiment are denoted by the same reference numerals as those in the first embodiment. Therefore, the explanation will be omitted.

[0071] The diagnostic system in this embodiment is the same as that in the first embodiment, except that a vibration device 71 is used as shown in FIG. The vibration method of the measuring devices 72A and 72B and the measurement method of the measuring devices 72A and 72B are different.

[0072] In this embodiment, the vibration method of the vibration device 71 is to generate pressure waves (sound pressure) from a speaker or the like. A vibration device that generates pressure waves from a pressure wave generator such as a speaker is used. The pressure wave vibrates the conductor 11A. The pressure wave generally attenuates with the square of the distance. Therefore, it is desirable to place the pressure wave generator near the target. Alternatively, it is possible to use it as a surface sound source. This gives directionality to the pressure wave and reduces attenuation.

[0073] Furthermore, in this embodiment, the measuring devices 72A and 72B are microphones (sound pressure sensors). The sound pressure generated by the vibration generated by the excitation of the measurement target is measured by a sound pressure sensor such as a microphone. By doing so, it is possible to estimate the relative change in vibration value from the fluctuation in sound pressure, which is correlated with the vibration value of the measurement target. It is possible.

[0074] As described above, according to this embodiment, the following effects can be obtained.

[0075] The first embodiment is a method using laser ablation, and the second embodiment is a method using laser ablation. In comparison with the method using laser irradiation induced plasma, the scale of the device in this embodiment can be reduced. This makes it easy to permanently install a vibration device inside the facility.

[0076] Although several embodiments of the present invention have been described above, these embodiments are presented as examples. These novel embodiments are provided for illustrative purposes only and are not intended to limit the scope of the invention. The present invention can be embodied in various other forms without departing from the spirit and scope of the present invention. Various omissions, substitutions, and modifications can be made. The scope of the invention and its equivalents as described in the claims are included in the scope and spirit of the disclosure. is included. [Explanation of symbols]

[0077] 10...diagnostic device, 11, 11A, 11B, 11C, 11D, 11E...conductor, 12...vibration device 13, 13A, 13B... measuring device, 14... communication unit, 15... diagnostic information generating unit, 16... diagnostic Disconnecting section, 17... output section, 20... control section, 31A, 31B, 31C, 31D... fastening section, 32A ,32B...fixing part, 51,56...hole for fixing part, 52,53,54,55...hole for fastening part, a ... vibration position, b, b'... measurement position, 61... vibration device, 71... vibration device, 72A, 72B... Measurement equipment

Claims

1. a vibration applying means for applying vibration in a non-contact manner to a first conductor that supplies electric power to a load; The vibration applied to the first conductor by the vibration applying means and the fastening member are fastened to the front conductor by a predetermined fastening member. The vibration transmitted to the first conductor and the second conductor connected thereto are measured in a non-contact manner. and The information on the vibration of the first conductor measured by the measuring means is transmitted to the second conductor. and vibration information after the fastening member is fastened. a diagnostic information generating unit for generating diagnostic information for diagnosing the presence or absence of the abnormality; The diagnostic information generated by the diagnostic information generating unit is a predetermined condition regarding an abnormality of the fastening portion. a diagnosis unit that diagnoses that the fastening portion has an abnormality when the above-mentioned conditions are satisfied; A diagnostic system comprising:

2. The diagnostic information is a vibration acceleration of the vibration after being transmitted to the second conductor. Transmissibility of vibration is calculated by dividing the vibration acceleration of a given vibration by the The diagnostic system of claim 1 .

3. The excitation by the excitation means and the measurement by the measurement means are The vibration means and the measurement means are arranged so that the vibration is performed on the surface having the largest area among the surfaces having the largest area. The stages are arranged The diagnostic system according to claim 1 or 2.

4. The vibration direction of the vibration means and the measurement direction of the measurement means are the same as the predetermined fastening member. The vibration means and the measurement means are arranged so that the vibration direction is the same as the axial direction of the bolt. The diagnostic system according to claim 1 or 2.

5. The vibration of the vibration means and the measurement of the measurement means are performed near the fastening portion by the predetermined fastening member. The vibration means and the measurement means are arranged so as to be performed nearby. The diagnostic system according to claim 1 or 2.

6. The vibration means is a laser irradiation device. The diagnostic system according to claim 1 or 2.

7. The vibration means is a pressure wave generator. The diagnostic system according to claim 1 or 2.

8. The measuring means is a laser Doppler type measuring device. The diagnostic system according to claim 1 or 2.

9. The measuring means is a sound pressure sensor. The diagnostic system according to claim 1 or 2.

10. The diagnostic device applying vibration to a first conductor that supplies power to a load in a non-contact manner by a vibration excitation means; The information on the vibration applied to the first conductor by the vibration applying means and the information on the vibration applied to the first conductor by a predetermined fastening member are The information on the vibration after being transmitted to the second conductor fastened to the first conductor is then transmitted to the first conductor. and measuring the second conductor in a non-contact manner, The diagnostic information generated by the diagnostic information generating unit from the information on the measured vibration is When a predetermined condition regarding an abnormality in a fastening portion made of a material is satisfied, a diagnosis unit detects an abnormality in the fastening portion. Diagnose that there is Diagnostic methods.

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