WO2022234704A1 - 振動診断装置 - Google Patents
振動診断装置 Download PDFInfo
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- WO2022234704A1 WO2022234704A1 PCT/JP2022/005410 JP2022005410W WO2022234704A1 WO 2022234704 A1 WO2022234704 A1 WO 2022234704A1 JP 2022005410 W JP2022005410 W JP 2022005410W WO 2022234704 A1 WO2022234704 A1 WO 2022234704A1
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- vibration
- diagnosis
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- bearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/003—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
Definitions
- the present invention relates to a vibration diagnostic device.
- a vibration diagnostic device is disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-98149 (Patent Document 1).
- the vibration diagnosis device disclosed in Japanese Patent Application Laid-Open No. 2012-98149 includes a plurality of vibration sensors and a vibration diagnosis unit that receives wireless signals transmitted from the vibration sensors and diagnoses the state of mechanical equipment.
- This vibration diagnostic apparatus includes an AD conversion unit that converts the output signal of the vibration sensor into a digital signal, a wireless transmission unit that wirelessly transmits the AD-converted signal, and a power supply for driving the vibration sensor and the wireless transmission unit. , is provided. Also, the measurement target is stored based on the location where the vibration sensor is installed.
- the vibration diagnosis section uses frequency analysis, Lissajous analysis, actual operation analysis, and coherence function analysis, and selects the measurement target based on the installation location of the vibration sensor, thereby diagnosing the vibration state of the mechanical equipment. to decide.
- Patent Document 2 discloses a machine component inspection system using an information terminal.
- data detected by a vibration sensor connected to an information terminal is wirelessly transmitted from the information terminal to a server. Then, the result of data processing by the server is wirelessly transmitted to the information terminal and displayed.
- Japanese Patent Application Laid-Open No. 2015-114214 performs threshold determination based on numerical data when inspecting a mechanical component. In addition, abnormal parts are displayed based on the rotation speed and bearing model number information.
- a vibration diagnostic apparatus for diagnosing vibration of an object to be diagnosed based on an input signal from the outside, and detecting vibration of the object to be diagnosed.
- a vibration sensor for extracting a predetermined frequency band from the waveform of a signal detected by the vibration sensor, and frequency analysis of the filtered waveform obtained by the filter processor to generate spectrum data.
- an arithmetic processing unit wherein the arithmetic processing unit calculates at least one basic vibration statistic obtained from the waveform of the signal detected by the vibration sensor when the spectral data is not generated based on the input signal. The amount is calculated, and the presence or absence of abnormality in the diagnostic object is diagnosed.
- the vibration diagnosis device may have a wireless communication unit, and the input signal from the outside may be a signal transmitted from an information terminal device having a wireless communication function.
- the diagnostic object is, for example, a machine part.
- a diagnostic system is a diagnostic system comprising the vibration diagnostic device described above and an information terminal device, wherein the information terminal device includes a communication unit that transmits and receives signals to and from the vibration diagnostic device. a diagnostic unit that compares frequency components contained in the spectrum data transmitted from the vibration diagnostic apparatus with damage frequencies caused by the damage of the diagnostic target, and diagnoses an abnormality of the diagnostic target; and and an output unit for outputting the diagnosis result.
- the information terminal device provides an input signal for setting the arithmetic processing unit of the vibration diagnostic apparatus not to diagnose whether or not there is an abnormality in the diagnosis target when the diagnosis unit diagnoses an abnormality in the diagnosis target. may be sent.
- the information terminal device comprises a database that stores the pulse frequency caused by the damage of the diagnosis target as a damage frequency converted based on a predetermined rotational speed of the diagnosis target, and the damage frequency is the pulse frequency of the database. may be given by calculating using the actual rotational speed of the diagnostic object.
- the diagnosis target is a bearing
- the database stores the vibration pulse frequency caused by damage to the inner ring, outer ring, and rolling element of the bearing as a bearing damage frequency converted based on a predetermined rotational speed of the bearing. and the pulse frequency may be given by calculating the damage frequency in the database using the actual rotation speed of the diagnostic object.
- the diagnosis unit Based on the FFT spectrum obtained by the envelope processing by the arithmetic processing unit of the vibration diagnosis device, the diagnosis unit changes the bearing identification number, the number of revolutions of the rotating ring, and the determination level for diagnosing bearing damage, and re-diagnoses. good too.
- the information terminal device may have a storage unit, and the FFT spectrum obtained by the envelope processing performed by the arithmetic processing unit of the vibration diagnosis device may be stored in the storage unit.
- the data obtained by AD converting the vibration signal acquired by the vibration sensor, which is stored in the internal memory of the vibration diagnosis device, is called, and the FFT spectrum after envelope processing calculated by changing the filter processing and analysis processing is applied. good too.
- the output section can include at least one of an image display section and an audio output section.
- the diagnostic system may be a system for diagnosing the diagnostic targets (bearings) respectively provided in a plurality of pieces of equipment.
- the diagnostic system may further comprise an external terminal installed with management software.
- the external terminal device may include a communication unit, a display unit, and a printing unit.
- the external terminal acquires the waveform signal, the spectrum data, the diagnosis result of the arithmetic processing unit, and the diagnosis result of the diagnosis unit from the information terminal device, and detects the time course of the vibration for each of the plurality of equipment. You can manage the trend of Also, the external terminal may display the spectrum data and the waveform signal. Also, the external terminal device may display the diagnosis result of the diagnosis unit.
- the external terminal device may display the presence or absence of abnormality by diagnosis of the arithmetic processing unit. Further, the external terminal device may change the bearing number of the bearing and the number of revolutions of the rotating ring, and may change the bearing damage diagnosis level of the diagnosis unit to cause the diagnosis unit to re-diagnose. Further, the external terminal device may set a patrol route for diagnosing the plurality of facilities. In addition, the external terminal device can manage the tendency, display the waveform signal, display the diagnosis result, display the presence or absence of the abnormality, the bearing reference number, the number of revolutions of the rotating ring, the abnormality diagnosis level, and the patrol route. can be automatically generated.
- vibration analysis can be performed more easily. Also, according to another aspect of the present invention, efficient and accurate vibration analysis can be performed.
- FIG. 1 is a block diagram of a machine component diagnosis system according to the first embodiment.
- FIG. 2 is a correspondence table of bearing parts and frequencies.
- FIG. 3 is a diagram showing a flow of diagnosis processing when bearing damage diagnosis is selected in the machine component diagnosis system.
- FIG. 4 is a diagram showing the flow of diagnosis processing when vibration value measurement/simple diagnosis is selected.
- FIG. 5 is a diagram showing the flow of diagnostic processing when frequency analysis is selected.
- FIG. 6 is a block diagram of a mechanical component diagnosis system according to the second embodiment.
- FIG. 7 is a diagram showing the flow of diagnostic processing according to the second embodiment.
- FIG. 1 is a block diagram of a mechanical component diagnosis system 100 according to the first embodiment.
- a machine component diagnostic system 100 has a server 10 , a vibration diagnostic device 20 and an information terminal device 40 .
- the machine component diagnosis system 100 is a system for diagnosing machine components.
- the rolling bearing 11 will be described as an example of a diagnosis target (mechanical component).
- the vibration diagnosis device 20 can operate in one of a plurality of modes (bearing damage diagnosis, vibration value measurement, simple diagnosis, frequency analysis, etc.).
- the rolling bearing 11 includes an outer ring 12 fitted inside a housing 15, an inner ring 13 fitted around a rotating shaft of mechanical equipment (not shown), and arranged to be able to roll between the outer ring 12 and the inner ring 13. It has a plurality of rolling elements 14 and a retainer (not shown) that holds the rolling elements 14 so that they can roll.
- the vibration diagnosis device 20 mainly includes a vibration sensor 21, a filter processing section 22, an arithmetic processing section 23, an internal memory 24, a transmission/reception section 26, an amplifier 28, an A/D conversion section 30, and a power supply 31.
- the filtering unit 22 includes a high pass filter (HP filter) 27 and an anti-alias filter (AA filter) 29 .
- the transmitting/receiving section 26 may also be referred to as a wireless communication section.
- the internal memory 24 may also be called a storage unit.
- the vibration sensor 21 is composed of, for example, a piezoelectric acceleration sensor. By attaching the vibration diagnostic device 20 to the housing 15 and supplying power from the power supply 31 to the vibration sensor 21 , the vibration sensor 21 detects vibration of the rolling bearing 11 .
- a female thread (not shown) is formed at the distal end portion of the vibration diagnostic device 20 to which the vibration sensor 21 is attached. can be fixed to
- the power supply 31 is composed of a lithium battery or the like, and can be charged from the outside via a USB terminal (USB cable) or the like.
- a switch (not shown) for turning on/off the power supply 31 is provided on the side surface of the vibration diagnostic apparatus 20 .
- the vibration signal detected by the vibration sensor 21 passes through the HP filter 27, amplifier 28, AA filter 29, and A/D converter 30 in this order.
- the HP filter 27 and the AA filter 29 that constitute the filtering section 22 function as bandpass filters.
- a specific frequency band is extracted from the vibration signal detected by the vibration sensor 21 by the filtering unit 22 functioning as a bandpass filter.
- the vibration signal is amplified by the amplifier 28 , converted to a digital signal by the A/D conversion section 30 , and sent to the arithmetic processing section 23 .
- the arithmetic processing unit 23 has a filtering function, and performs filtering on specific frequency bands extracted by the HP filter 27 and the AA filter 29 . Therefore, in this embodiment, the filter processing function of the arithmetic processing unit 23 functions as part of the filter processing unit 22 . Further, the arithmetic processing unit 23 performs vibration value calculation based on the AD-converted signal. The arithmetic processing unit 23 generates data for displaying frequency domain and time domain waveforms, and further performs frequency analysis after absolute value detection to generate diagnostic spectrum data. For example, the arithmetic processing unit 23 performs absolute value processing and envelope processing on the filtered signal as necessary, and then performs FFT analysis to generate spectral data. Data after AD conversion, calculated spectrum data, and the like are temporarily stored in the internal memory 24 .
- the transmitting/receiving unit 26 is configured to comply with wireless standards such as Bluetooth (registered trademark), for example.
- the transmitting/receiving section 26 receives an operation command signal from the information terminal device 40 and transmits a spectrum data signal obtained by the analysis function of the arithmetic processing section 23 to the information terminal device 40 .
- the transmitting/receiving unit 26 transmits various data after arithmetic processing to the information terminal device 40 such as a tablet or a personal computer via Bluetooth communication. Communication between the vibration diagnostic device 20 and the information terminal device 40 may be performed by wire.
- Reference numeral 26a is an antenna.
- the information terminal device 40 is a smartphone, tablet, personal computer, or the like, and includes a transmission/reception section 42 , an arithmetic processing section 43 , a first internal memory 44 , a display operation section 45 , a speaker 46 and a second internal memory 47 .
- the first internal memory 44 has a damage frequency database (DB) 44a.
- the arithmetic processing unit 43 has a bearing damage diagnosis unit 43a.
- the display operation section 45 may be called a display section or an output section.
- the transmission/reception unit 42 is a communication unit that transmits/receives signals to/from the vibration diagnostic apparatus 20 .
- the first internal memory 44 and the second internal memory 47 may be called storage units.
- the information terminal device 40 can install application programs and update application programs via the Internet.
- Reference numeral 42a is an antenna.
- the information terminal device 40 displays vibration values, waveform display, bearing damage analysis, judgment result display, judgment result storage, vibration data based on various data received from the vibration diagnosis device 20 It can convert to sound and reproduce the sound.
- the information terminal device 40 Based on the spectrum data received by the transmitter/receiver 42 from the transmitter/receiver 26 of the vibration diagnostic device 20, the information terminal device 40 detects the bearing number of the rolling bearing 11 stored in the first internal memory 44 and the pulse caused by the damage to the part. Arithmetic processing is performed by the arithmetic processing unit 43 according to a predetermined procedure while referring to the damage frequency database 44a such as frequencies, and the result is output (displayed as an image) to the display operation unit 45 and stored in the second internal memory 47.
- the transmitting/receiving unit 42 transmits/receives various data to/from the vibration diagnostic apparatus 20 . For example, the transmitter/receiver 42 transmits an operation command to the vibration diagnostic device 20 .
- the transmitter/receiver 42 also receives spectrum data and vibration measurement results from the vibration diagnostic apparatus 20 .
- the display operation unit 45 displays vibration values, bearing damage diagnosis results, various waveforms, and the like.
- the display operation unit 45 can also select and input the bearing number of the rolling bearing 11 to be diagnosed, the rotational speed of the rotating ring, the damage determination level, and the like.
- the display operation unit 45 is, for example, a liquid crystal display unit having a touch panel function.
- the arithmetic processing unit 43 Based on the spectrum data received from the transmission/reception unit 26 of the vibration diagnosis device 20, the arithmetic processing unit 43 refers to the database 44a of the pulse frequency caused by the damage stored in the first internal memory 44, and operates the rolling bearing 11. Diagnose the presence or absence of damage to the body and the location of the damage.
- the pulse frequency caused by the damage of the rolling bearing 11 stored in the first internal memory 44 is the converted frequency of the rolling bearing 11 converted based on a predetermined rotational speed, and the pulse frequency used for damage diagnosis is It can be obtained by calculating the converted frequency using the actual rotational speed of the rolling bearing 11 .
- the bearing number input of the rolling bearing 11 may be selected from a list displayed on the screen of the display operation unit 45 of the information terminal device 40, or may be manually input individually. For the rolling bearing 11 whose bearing number is not registered, the predetermined relational expression shown in Table 50 of FIG. is used to calculate the pulse frequency due to damage for each part of the rolling bearing 11 .
- the damage determination level may be selected from a plurality of candidates displayed on the screen of the display operation unit 45 of the information terminal device 40, or may be manually input individually.
- the data stored in the first internal memory 44 and the second internal memory 47 of the information processing device 40 may be stored in the server 10 or another device (eg, host computer).
- FIG. 3 is a flow chart for explaining processing such as measurement and diagnosis executed by the mechanical component diagnosis system 100.
- the operator turns on the switch of the power source 31 of the vibration diagnostic device 20, and selects a measurement menu from the input screen of the display operation section 45 of the information terminal device 40 (step S1). It is assumed that the measurement menu includes a bearing damage diagnosis function, a vibration value measurement function, a simple diagnosis function, a frequency analysis function, a time waveform analysis function, and a data storage and display function, which are displayed on the input screen.
- the bearing damage diagnosis function diagnoses the presence or absence of damage such as damage to the outer ring 12, inner ring 13, and rolling element 14 of the rolling bearing 11, flaking, and compression, and the damaged parts.
- the vibration value measurement function measures the effective value, peak value, and crest factor of vibration displacement, velocity, and acceleration.
- the simple diagnosis function compares the effective values and peak values of the detected vibration displacement, velocity, acceleration, etc., with preset determination values to easily diagnose whether there is an abnormality in the rotating part.
- the frequency analysis function displays the FFT spectrum obtained by frequency-analyzing the vibration signal.
- the time waveform analysis function displays the time domain waveform of the vibration signal.
- the data storage and display function stores and displays a series of measurement results of bearing damage diagnosis, vibration value measurement, frequency analysis, and time waveform analysis.
- the vibration diagnosis device 20 operates based on a command signal (mode designation signal) transmitted from the transmission/reception unit 42 of the information terminal device 40, and the vibration sensor 21 acquires the time waveform (vibration signal) of the vibration of the rolling bearing 11. (Step S3).
- the acquired vibration signal is filtered by the filter processor 22 (step S4), and a specific frequency band is extracted. It can be said that the command signal (mode designation signal) transmitted from the information terminal device 40 to the vibration diagnostic device 20 is an input signal to the vibration diagnostic device 20 from the outside.
- the arithmetic processing unit 23 performs frequency analysis on the frequency band extracted by the filter processing unit 22 and generates an FFT spectrum waveform (step S5), or after performing absolute value detection processing or envelope processing A frequency analysis is performed to generate an envelope FFT spectrum (step S6).
- the calculation processing unit 23 is an FFT calculation unit that generates the frequency spectrum of the vibration signal, and generates the frequency spectrum of the vibration signal based on the FFT algorithm and envelope analysis.
- the frequency spectrum is transmitted from the transmission/reception unit 26 of the vibration diagnosis device 20 to the information terminal device 40 as spectrum data. Since the data transmitted to the information terminal device 40 is spectrum data obtained by FFT-processing the time waveform signal detected by the vibration sensor 21, the amount of data to be transmitted is reduced compared to the case where the time waveform is transmitted to the information terminal device 40. has been significantly reduced. Therefore, the data transfer time is shortened and the communication time is shortened.
- the spectral data received by the transmitting/receiving section 42 of the information terminal device 40 is used by the bearing damage diagnosis section 43a of the arithmetic processing section 43 to refer to the bearing information recorded in the first internal memory 44 to determine whether the rolling bearing 11 is damaged. etc. are diagnosed (step S7).
- step S8 it identifies which one of the outer ring 12, inner ring 13, and rolling element 14 is the damaged component, and displays and saves the result on the display operation unit 45 (step S8). That is, the display operation unit 45 outputs (displays) the diagnosis result.
- step S7 After diagnosing bearing damage, if you want to change the bearing number, rotation speed of the rotating ring, and damage judgment level, select and enter them, and correspond to the bearing number stored from the first internal memory 44. By retrieving various information such as the pulse frequency caused by the damage, the presence or absence of damage to the rolling bearing 11 is re-diagnosed under the changed conditions without executing steps S2 to S6 (step S7). can be output to the display operation unit 45 for display and storage (step S8).
- step S9 the bearing damage diagnosis result stored in the second internal memory 47 is called up and displayed on the display operation unit 45 (step S9), and the bearing identification number, the rotation speed of the rotating ring, and the damage determination level are changed, and re-diagnosis is performed. (step S7), and the result can be displayed and saved (step S8). Furthermore, the vibration signal acquired by the vibration sensor 21 stored in the internal memory 24 can be called (step S3'), and the processes after step S4 can be executed.
- step S1 when the vibration value measurement/simple diagnosis function (vibration value measurement/simple diagnosis mode) by the vibration diagnosis device 20 is selected, as shown in FIG. It is transmitted to the diagnostic device 20 via the transmission/reception unit 42 of the terminal device 40, and the vibration sensor 21 acquires the time waveform of the vibration of the rolling bearing 11 (step S3).
- the arithmetic processing unit 23 calculates a vibration value, which is a determination parameter used for determination by the simple diagnostic function (step S10).
- a determination parameter at least one vibration value of vibration acceleration or velocity effective value (RMS), peak value (PEAK), crest factor (CF), and displacement PP value is calculated.
- PP is an abbreviation for Peak-to-Peak, and the PP value indicates both amplitude values in the time waveform of vibration.
- step S10 From the acceleration, velocity, and displacement determination parameters calculated in step S10, it is possible to perform absolute value determination based on the ISO standard and determination based on preset determination values using the simple diagnostic function. That is, the calculated determination parameters, namely, the effective value (RMS) of the acceleration and velocity, the peak value (PEAK), the crest factor (CF), and the PP value of the displacement, are compared with the respective determination values for simple diagnosis. (step S11).
- the calculated determination parameters namely, the effective value (RMS) of the acceleration and velocity, the peak value (PEAK), the crest factor (CF), and the PP value of the displacement.
- the effective value (RMS), the peak value (PEAK), and the crest factor (CF) are determined by comparison with each determination value.
- Each determination value (determination result) is stored in the internal memory 24 .
- the determination result of the vibration value is transmitted to the information terminal device 40 via the transmission/reception unit 26 of the vibration diagnosis device 20, and the display operation unit 45 displays the determination result in color (step S12).
- the arithmetic processing unit 23 calculates at least one basic statistic of vibration obtained from the waveform of the signal detected by the vibration sensor 21, ) for any abnormalities.
- the bearing damage diagnosis mode can also be expressed as follows. That is, when the bearing damage diagnosis unit 43a diagnoses an abnormality in the diagnosis target (rolling bearing 11), the information terminal device 40 does not cause the arithmetic processing unit 23 of the vibration diagnosis device 20 to diagnose whether there is an abnormality in the diagnosis target. Send an input signal for setting.
- step S1 when the frequency analysis function (frequency analysis mode) of the mechanical component diagnostic system 100 is selected, as shown in FIG. It is sent to diagnostic device 20 .
- the vibration diagnosis device 20 operates based on the command signal received from the information terminal device 40, and the vibration sensor 21 acquires the time waveform of vibration (step S3).
- the acquired temporal waveform of the vibration is filtered by the filter processor 22 (step S4), and a specific frequency band is extracted.
- the arithmetic processing unit 23 performs frequency analysis of the vibration signal in the specific frequency band calculated by the filtering unit 22 (step S5).
- the calculation processing unit 23 is an FFT calculation unit that calculates the frequency spectrum of the vibration signal, and calculates the FFT spectrum based on the FFT algorithm. Note that the FFT waveform is averaged using exponential averaging. Envelope processing can also be selectively performed.
- the calculated FFT waveform is transmitted from the transmitting/receiving section 26 of the vibration diagnostic apparatus 20 to the transmitting/receiving section 42 of the information terminal device 40 .
- the information terminal device 40 displays the received FTT waveform on the display operation section 45 (step S13).
- the vibration sensor 21 detects the vibration of the rolling bearing 11 (mechanical component)
- the filtering unit 22 detects a predetermined frequency from the waveform of the vibration signal.
- the band is extracted, the arithmetic processing unit 23 performs frequency analysis on the filtered waveform to obtain spectral data, the transmitting/receiving unit 26 transmits the spectral data to the information terminal device 40, and the information terminal device 40 detects the rolling bearing 11.
- the vibration Since the vibration is diagnosed, the amount of data transmitted from the vibration diagnostic device 20 to the information terminal device 40 can be reduced, and the data transfer time can be shortened. Moreover, since the data transfer time can be shortened, the power consumption of the vibration diagnostic apparatus 20 can also be reduced.
- the arithmetic processing unit 23 of the vibration diagnostic device 20 calculates at least one vibration value obtained from the waveform of the signal detected by the vibration sensor 21, and the vibration evaluation standard based on ISO 10816 or a preset vibration judgment value A simple diagnosis can be made by comparing with . That is, the vibration diagnosis device 20 can diagnose the rolling bearing 11 without transmitting vibration data to the information terminal device 40 .
- the arithmetic processing unit 43 (bearing damage diagnosis unit 43a) of the information terminal device 40 detects the frequency component contained in the spectrum data transmitted from the wireless vibration diagnosis device 20. and the damage frequency caused by the damage of the rolling bearing 11 are compared to diagnose an abnormality of the rolling bearing 11, and the display operation unit 45 outputs (displays) the diagnosis result. It is possible to reduce the amount of data transmitted to the information terminal device 40 and accurately diagnose the rolling bearing 11 .
- the information terminal device 40 has a database 44a (first internal memory 44) that stores the pulse frequency caused by the damage of the rolling bearing 11 as a damage frequency converted based on the predetermined rotational speed of the rolling bearing 11,
- the pulse frequency is given by calculating the converted damage frequency of the database 44 a using the actual rotational speed of the rolling bearing 11 . Therefore, there is no need to store the specifications of the individual rolling bearings 11 in the information terminal device 40, and the specifications of the rolling bearings 11 can be concealed.
- the bearing damage diagnosis if it is desired to change the bearing identification number, the rotation speed of the rotating ring, or the damage determination level, they are selected and input, and stored from the first internal memory 44.
- various information such as the pulse frequency caused by the damage corresponding to the bearing number that has been changed, the presence or absence of damage to the rolling bearing 11 can be re-examined under the changed conditions without executing steps S2 to S6. can be diagnosed. Further, the re-diagnosis result can be output to the display operation unit 45 for display, and can be stored in the second memory 47 .
- the bearing damage diagnosis result saved in the second internal memory 47 can be called up and displayed on the display operation unit 45, and the bearing identification number, the number of revolutions of the rotating ring, and the damage determination level can be changed and rediagnosed. . Moreover, the result can be displayed on the display operation unit 45 and stored in the second memory 47 . Furthermore, the vibration signal obtained by the vibration sensor 21 stored in the internal memory 24 can be called up, and the processes after step S4 can be executed. Therefore, according to the present embodiment, accurate vibration diagnosis and vibration analysis can be performed more easily and efficiently.
- the vibration diagnostic apparatus 20 receives the mode designation signal (function determination signal) from the information terminal device 40 and operates according to the function designated by the signal.
- the vibration diagnostic apparatus 20 may include an input section, and mode selection (mode determination) may be performed via the input section.
- mode selection mode determination
- the first internal memory 44 and the second internal memory 47 of the information terminal device 40 are shown as separate memories (storage units), but the first internal memory 44 and the second internal memory 47 are integrated. may be used as one memory.
- the determination level of bearing damage analysis can be changed.
- the vibration data detected by the vibration sensor can be retrieved from the internal memory, and re-diagnosis can be made by changing the analysis conditions in addition to (1) above.
- FIG. 6 is a block diagram showing the configuration of a machine component diagnosis system 100A according to the second embodiment of the invention.
- the mechanical component diagnostic system 100A includes a wireless vibration diagnostic device 20 and an information terminal device 40A.
- the operating sound of the rolling bearing 11 is reproduced by the speaker 46 .
- a function of reproducing the operation sound of the rolling bearing 11 by the speaker 46 is called a hearing function. Therefore, in the second embodiment, a hearing function is added to the diagnosis menu. Since the speaker 46 outputs driving sounds, it may be called an output unit.
- the vibration time waveform acquired by the vibration sensor 21 is used for listening to the operating sound of the rolling bearing 11, the vibration time waveform is transmitted from the vibration diagnosis device 20 to the information terminal device 40A.
- the machine component diagnosis system 100A of this embodiment has a filter processing section 49 in the information terminal device 40A.
- the filter processor 49 extracts a specific frequency band from the time waveform of the vibration and transfers it to the arithmetic processor 43 .
- the arithmetic processing unit 43 of the information terminal device 40A has a function of performing envelope processing and FFT analysis on the time waveform of a specific frequency band (bearing damage diagnosis unit 43b).
- FIG. 7 is a flow chart showing processing executed by the machine component diagnosis system 100A when hearing is selected in the selection menu.
- step S1 when the listening function by the machine component diagnosis system 100A is selected, an operation command for listening is sent to the vibration diagnosis device via the transmission/reception unit 42 of the information terminal device 40A. 20.
- the vibration diagnosis device 20 operates based on the command signal received from the information terminal device 40A, and the vibration sensor 21 acquires the time waveform of vibration (step S3).
- the acquired time waveform (data) of the vibration is transmitted to the information terminal device 40A via the transmitting/receiving section 26 of the vibration diagnostic device 20.
- the received time waveform (data) of vibration is stored in the first internal memory 44 in order to enable repeated use of the time waveform data (step S20).
- the filter processing unit 49 performs filter processing for extracting a specific frequency band desired to be heard (step S21), and the arithmetic processing unit 43 calculates the FFT waveform of the vibration signal based on the FFT algorithm (step S22). .
- the calculated FFT waveform is output to the speaker 46 to reproduce and output the driving sound (step S23).
- the driver wants to hear the driving sound of another frequency band step S24
- the process returns to step S21, and the time waveform of the vibration stored in the first internal memory 44 is reacquired and the same operation is performed.
- the hearing function can be added to the mechanical component diagnostic system 100 of the first embodiment.
- the information terminal device 40A with the filter processing unit 49 and allowing the arithmetic processing unit 43 to perform FFT analysis, it is possible to reproduce and output driving sounds in a plurality of frequency bands.
- Other configurations and actions are the same as those of the mechanical component diagnosis system 100 of the first embodiment.
- the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate.
- the mechanical component to be diagnosed is not limited to the rolling bearing 11, and the present invention can be similarly applied to a mechanical component that vibrates during operation, such as a gear.
- the vibration diagnostic device 20 and the information terminal device 40 (40A) are associated one-to-one, and the specific vibration diagnostic device 20 and the specific information terminal device 40 (40A) transmits and receives data.
- various diagnoses by the mechanical component diagnostic system 100 (100A) are configured such that one information terminal device 40 (40A) is associated with a plurality of vibration diagnostic devices 20, and a large number of mechanical components are cyclically monitored. good too.
- the vibration diagnostic device 20 is installed in each of a large number of machine parts, and a portable information terminal device 40 (40A) such as a tablet monitors and diagnoses a large number of machine parts. may
- the power source 31 of the vibration diagnostic device 20 is automatically turned on, Detection, analysis, and transmission may be automatically performed according to instructions from the terminal device 40 (40A).
- the USB terminal installed in the wireless vibration diagnostic device 20 as described above, in addition to the function of charging the power supply 31 from the outside, transmits the time waveform and spectrum data to the information terminal device 40 (40A) by wire. You may do so.
- various data stored by the information terminal device 40 (40A) are taken into an external device (external terminal device) such as the server 10 or a host computer, management of the tendency of the vibration level over time, display of the frequency spectrum and time waveform, Display of bearing precision diagnosis spectrum, re-diagnosis with changed judgment level for diagnosing bearing identification number, rotation speed of rotating ring, and presence or absence of damage for bearing precision diagnosis spectrum, patrol route management, creation of simple report, etc. , more detailed management becomes possible.
- the mechanical component diagnostic system 100 is used as a system for diagnosing diagnostic targets (bearings 13) respectively provided in a plurality of facilities, and the mechanical component diagnostic system 100 further has an external terminal installed with management software.
- the external terminal device may have a communication function, a display function and a print function.
- the external terminal device may acquire the vibration waveform signal, the spectrum data, the diagnosis result of the arithmetic processing unit 23 and the diagnosis result of the diagnosis unit 43a from the information terminal device 40, and execute the following items.
- the external terminal device managing the tendency of the vibration over time for each of the plurality of pieces of equipment; displaying the spectral data and the waveform signal; displaying the diagnosis result of the diagnosis unit 43a; Displaying the presence or absence of abnormality by diagnosis of the arithmetic processing unit 23, Changing the bearing number of the bearing 13 and the rotation speed of the rotating ring, and changing the bearing damage diagnosis level of the diagnosis unit 43a to cause the diagnosis unit 43a to re-diagnose; setting a patrol route when diagnosing the plurality of facilities; automatically creating a report of the management of the tendency, the display of the waveform signal, the display of the diagnosis result, the display of the presence or absence of the abnormality, the bearing number, the number of revolutions of the rotating ring, the abnormality diagnosis level, and the patrol route; may be executed.
- the pulse frequency database 44a stored in the first internal memory 44 of the information terminal device 40 (40A) of the above embodiment is effective in concealing the dimensions of the machine parts (rolling bearing 11).
- the use of the information terminal device 40 (40A) is not limited to the case of diagnosing an abnormality using the wireless vibration diagnosis device 20.
- FIG. That is, within the technical scope of the present invention, a predetermined frequency band is extracted from the waveform of the signal of the mechanical component detected by the vibration sensor 21, and the frequency components obtained by frequency analysis and the pulse frequency resulting from the damage of the mechanical component.
- an information terminal device 40 for diagnosing an abnormality in a mechanical part, wherein the pulse frequency caused by the damage of the mechanical part is converted to the damage frequency based on the predetermined rotational speed of the mechanical part , wherein the damage frequency is given by calculating the damage frequency in the database using the actual rotational speed of the mechanical component.
- the vibration analysis and diagnosis device (system) of the present invention includes a vibration detection unit for detecting vibration of mechanical equipment, an amplification unit for the detected vibration signal, and arithmetic processing of the amplified vibration signal to store information such as a tablet or a personal computer.
- Calculation transmission unit that wirelessly transmits data to the terminal device, reception unit that receives the calculation data, vibration value calculation based on the received data, frequency domain and time domain waveform display, and accumulation of frequencies caused by defects in bearing parts a bearing frequency database unit, a judgment level setting unit and an analysis judgment unit for automatically judging the presence or absence of defects on the surface of bearing parts and parts based on the bearing frequency database and rotation speed information, and the bearing number based on the analyzed frequency spectrum.
- a re-diagnosis unit that changes the rotational speed information and analysis conditions and makes an analysis determination.
- the machine component diagnostic system, the vibration diagnostic device and the information terminal device of the present invention can be applied to a plurality of rotary machinery equipment such as elevator hoisting machines, rotating equipment and escalator driving devices attached thereto, spindles for machine tools, and motors. It can be applied to vibration measurement of rotating parts (especially rolling bearings) and determination of the presence or absence of abnormalities in bearings and their locations.
- rotary machinery equipment such as elevator hoisting machines, rotating equipment and escalator driving devices attached thereto, spindles for machine tools, and motors. It can be applied to vibration measurement of rotating parts (especially rolling bearings) and determination of the presence or absence of abnormalities in bearings and their locations.
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Abstract
Description
そこで、本発明は、より簡単にかつ効率的に正確な振動解析を行うことができる振動診断装置を提供することを目的とする。
前記情報端末装置は、前記診断対象の損傷に起因するパルス周波数を、前記診断対象の所定の回転速度を元に換算した損傷周波数として保存するデータベースを備え、前記損傷周波数は、前記データベースのパルス周波数を、前記診断対象の実際の回転速度を用いて計算することで与えられてもよい。
前記診断部は、前記振動診断装置の演算処理部によるエンベロープ処理により得られたFFTスペクトルに基づき、軸受呼び番号、回転輪の回転数、軸受損傷を診断する判定レベルを変更して再診断してもよい。
また、前記振動診断装置の内部メモリに保存した、振動センサで取得した振動信号をAD変換したデータを呼び出して、フィルタ処理や解析処理を変更して算出したエンベロープ処理後のFFTスペクトルを適用してもよい。
前記出力部は、画像表示部と音声出力部の少なくとも一方を含むことができる。
なお、本発明の範囲は、以下の実施形態に限定されるものではなく、本発明の技術的思想の範囲内で変更及び修正等をすることが可能である。
図1~図5を参照して、本発明の第1実施形態を説明する。
図1は第1実施形態に係る機械部品診断システム100のブロック図である。機械部品診断システム100は、サーバ10と振動診断装置20と情報端末装置40を有する。機械部品診断システム100は機械部品の診断を行うシステムである。本実施形態では、診断対象(機械部品)の例として転がり軸受11を説明する。振動診断装置20は、複数のモード(軸受損傷診断、振動値測定、簡易診断、周波数分析など)のいずれかで動作できるとする。
例えば、振動センサ21が取り付けられる振動診断装置20の先端部には、不図示の雌ねじ部が形成されており、雌ねじ部に螺合する部材に磁石を取り付けることで、振動診断装置20をハウジング15に固定してもよい。
情報端末装置40は、インターネットを介してアプリケーションプログラムをインストールしたり、アプリケーションプログラムをアップデートすることができる。符号42aはアンテナである。情報端末装置40は、当該アプリケーションプログラムを利用することにより、振動診断装置20から受信した各種データに基づき、振動値表示、波形表示、軸受損傷解析、判定結果表示、判定結果の保存、振動データから音への変換、当該音の再生をすることができる。
送受信部42は、振動診断装置20との間で各種データの送受信を行う。例えば、送受信部42は、振動診断装置20へ動作指令を送信する。また、送受信部42は、スペクトルデータや振動測定結果を振動診断装置20から受信する。
演算処理部43は、振動診断装置20の送受信部26から受信したスペクトルデータに基づいて、第1内部メモリ44に記憶された損傷に起因したパルス周波数などのデータベース44aを参照しながら、転がり軸受11の損傷の有無、及び損傷部位を診断する。
転がり軸受11の呼び番号入力は情報端末装置40の表示操作部45の画面に表示される一覧表から選択してもよく、個別に手動入力することもできる。なお、呼び番号が登録されていない転がり軸受11については、所定の回転速度における部品ごとの換算周波数を入力することで、演算処理部43によって図2の表50に示された所定の関係式を用いて、転がり軸受11の部品ごとの損傷に起因するパルス周波数が計算される。
尚、情報処理装置40の第1内部メモリ44及び第2内部メモリ47に保存されるデータは、サーバ10またはその他の装置(例えば、ホストコンピュータ)などに保存してもよい。
操作者は振動診断装置20の電源31のスイッチをONにすると共に、情報端末装置40の表示操作部45の入力画面から、測定メニューを選択する(ステップS1)。測定メニューとして、軸受損傷診断機能、振動値測定機能、簡易診断機能、周波数分析機能、時間波形分析機能、データ保存と表示機能の各機能が入力画面に表示されるとする。
振動値測定機能は、振動の変位、速度、加速度などの実効値、ピーク値、波高率を測定する。
簡易診断機能は、検出された振動の変位、速度、加速度などの実効値、ピーク値を、予め設定した判定値と比較して、回転部の異常の有無を簡易的に診断する。
周波数分析機能は、振動信号を周波数分析したFFTスペクトルを表示する。
時間波形分析機能は、振動信号の時間領域波形を表示する。
データ保存と表示機能は、軸受損傷診断、振動値測定、周波数分析、時間波形分析の一連の測定結果の保存と表示を行う。
機械部品診断システム100において軸受損傷診断機能(軸受損傷診断モード)が選択されると、図3に示すようにステップS1において診断すべき軸受の呼び番号、回転輪の回転数、損傷の判定レベルなどを選択して入力し、第1内部メモリ44から記憶されている軸受の呼び番号に対応する損傷に起因したパルス周波数などの各種情報を呼び出して設定し診断開始を指示する(ステップS2)。
そして、演算処理部23がフィルタ処理部22で抽出された周波数帯域に対して周波数分析を行い、FFTスペクトル波形を生成する(ステップS5)か、あるいは、絶対値検波処理やエンベロープ処理を行った後に周波数分析を行い、エンベロープFFTスペクトルを生成する(ステップS6)。
周波数スペクトルは、スペクトルデータとして振動診断装置20の送受信部26から情報端末装置40に送信される。情報端末装置40に送信されるデータは、振動センサ21で検出された時間波形信号をFFT処理したスペクトルデータであるので、時間波形を情報端末装置40に送信する場合に比べて送信するデータ量が大幅に削減されている。このため、データの転送時間が短くなり通信時間が短縮される。
さらに、内部メモリ24に保存した振動センサ21で取得した振動信号を呼び出して(ステップS3‘)、ステップS4以降の処理を実行することもできる。
ステップS1において、振動診断装置20による振動値測定/簡易診断機能(振動値測定/簡易診断モード)が選択されると、図4に示すように、振動値測定/簡易診断の動作指令が、情報端末装置40の送受信部42を介して診断装置20に送信されて、振動センサ21が転がり軸受11の振動の時間波形を取得する(ステップS3)。
次いで、演算処理部23が、簡易診断機能で判定に使用される判定パラメータである振動値を算出する(ステップS10)。判定パラメータとして、振動の加速度や速度の実効値(RMS)、ピーク値(PEAK)、波高率(CF)、及び変位のP-P値の少なくとも一つの振動値が算出される。P-PはPeak-to-Peakの略であり、P-P値は振動の時間波形における両振幅値を示している。
振動値の判定結果は、振動診断装置20の送受信部26を介して情報端末装置40に送信され、表示操作部45が判定結果をカラー表示する(ステップS12)。
このように、振動値測定/簡易診断モードでは、演算処理部23は、振動センサ21により検出された信号の波形から得られる少なくとも一つの振動の基本統計量を算出し、診断対象(転がり軸受11)の異常の有無を診断する。
ステップS1において、機械部品診断システム100による周波数分析機能(周波数分析モード)が選択されると、図5に示すように、周波数分析の動作指令が、情報端末装置40の送受信部42を介して振動診断装置20に送信される。振動診断装置20は、情報端末装置40から受信した指令信号に基づいて作動して、振動センサ21が振動の時間波形を取得する(ステップS3)。
取得された振動の時間波形は、フィルタ処理部22によりフィルタ処理され(ステップS4)、特定の周波数帯域が抽出される。そして、演算処理部23が、フィルタ処理部22で算出された特定の周波数帯域における、振動信号の周波数分析を行う(ステップS5)。演算処理部23は、振動信号の周波数スペクトルを算出するFFT演算部であり、FFTアルゴリズムに基づいてFFTスペクトルを算出する。なお、FFT波形には、指数平均を用いて、平均化処理が行われている。また、エンベロープ処理を選択的に実行可能である。
以上説明したように、本実施形態の無線型振動診断装置20によれば、振動センサ21が転がり軸受11(機械部品)の振動を検出し、フィルタ処理部22が振動信号の波形から所定の周波数帯域を抽出し、演算処理部23がフィルタ処理後の波形を周波数分析してスペクトルデータを取得し、送受信部26がスペクトルデータを情報端末装置40に送信し、情報端末装置40が転がり軸受11の振動を診断するので、振動診断装置20から情報端末装置40に送信するデータ量を削減して、データの転送時間を短縮することができる。また、データの転送時間を短縮できることで、振動診断装置20の消費電力も低減することができる。
さらに、内部メモリ24に保存した振動センサ21で取得した振動信号を呼び出して、ステップS4以降の処理を実行することもできる。
従って、本実施形態によれば、より簡単にかつ効率的に正確な振動診断及び振動解析を行うことができる。
上記した実施形態では、情報端末装置40の第1内部メモリ44と第2内部メモリ47は別々のメモリ(記憶部)として示されているが、第1内部メモリ44と第2内部メモリ47を統合して1つのメモリとしてもよい。
(1)軸受損傷解析の判定レベルを変更できる。
(2)振動センサで検出した振動データを内部メモリから呼び出し、上記(1)の他に解析条件を変更して再診断できる。
本実施形態による解析診断装置では、振動を1回測定すれば、その振動データに基づき各種条件を変更して再解析や損傷診断をすることができるので、確実でかつ効率的な回転設備の保全検査を提供できる。
図6は、本発明の第2実施形態に係る機械部品診断システム100Aの構成を示すブロック図である。第1実施形態と同様な構成には同じ参照符号を付けて、説明を省略する。
図6に示すように、機械部品診断システム100Aは、無線型振動診断装置20と、情報端末装置40Aと、を備える。本実施形態では、第1実施形態で説明した転がり軸受11の診断に加え、転がり軸受11の運転音をスピーカ46によって再生する。転がり軸受11の運転音をスピーカ46によって再生する機能を聴音機能と称する。このため、第2実施形態では、診断メニューに聴音機能が追加される。スピーカ46は運転音を出力するので、出力部と称してもよい。
次に、本実施形態の機械部品診断システム100Aによる処理手順について説明する。振動診断装置20Aは、複数のモード(軸受損傷診断、振動値測定、簡易診断、周波数分析、聴音など)のいずれかで動作できるとする。軸受損傷診断、振動値測定、簡易診断、周波数分析については、第1実施形態と同じであるので説明を省略する。
図7は、選択メニューで聴音が選択された場合の機械部品診断システム100Aが実行する処理を示すフローチャートである。
図7に示すように、第2実施形態では、ステップS1において、機械部品診断システム100Aによる聴音機能が選択されると、聴音の動作指令が情報端末装置40Aの送受信部42を介して振動診断装置20に送信される。
取得された振動の時間波形(データ)は、振動診断装置20の送受信部26を介して情報端末装置40Aに送信される。受信された振動の時間波形(データ)は、当該時間波形データの繰り返し使用を可能とするため、第1内部メモリ44に保存される(ステップS20)。
特に、情報端末装置40Aにフィルタ処理部49を設け、演算処理部43でFFT解析を行うようにすることで、複数の周波数帯域での運転音を再生・出力することができる。
その他の構成及び作用については、第1実施形態の機械部品診断システム100と同様である。
また、無線型振動診断装置20に設置されたUSB端子は、上述したように、外部から電源31を充電する機能に加え、時間波形やスペクトルデータを有線で情報端末装置40(40A)へ送信するようにしてもよい。
前記複数の設備ごとに前記振動の時間経過の傾向を管理すること、
前記スペクトルデータ及び前記波形の信号を表示すること、
診断部43aの診断結果を表示すること、
演算処理部23の診断による異常の有無を表示すること、
軸受13の軸受呼び番号及び回転輪の回転数を変更すると共に、診断部43aの軸受損傷診断レベルを変更して、診断部43aに再診断をさせること、
前記複数の設備を診断する際の巡回ルートの設定を行うこと、
前記傾向の管理、前記波形の信号の表示、前記診断結果の表示、前記異常の有無の表示、前記軸受呼び番号、回転輪の回転数、異常診断レベル及び巡回ルートの報告を自動作成すること、を実行してよい。
なお、上記において特定の実施形態が説明されているが、当該実施形態は単なる例示であり、本発明の範囲を限定する意図はない。本明細書に記載された装置及び方法は上記した以外の形態において具現化することができる。また、本発明の範囲から離れることなく、上記した実施形態に対して適宜、省略、置換及び変更をなすこともできる。かかる省略、置換及び変更をなした形態は、請求の範囲に記載されたもの及びこれらの均等物の範疇に含まれ、本発明の技術的範囲に属する。
Claims (12)
- 外部からの入力信号に基づいて診断対象の振動を診断する振動診断装置であって、
前記診断対象の振動を検出する振動センサと、
前記振動センサにより検出された信号の波形から所定の周波数帯域を抽出するフィルタ処理部と、
前記フィルタ処理部で得られたフィルタ処理後の波形を周波数分析し、スペクトルデータを生成する演算処理部と、
を有し、
前記演算処理部は、前記入力信号に基づいて、前記スペクトルデータを生成しない場合、前記振動センサにより検出された信号の波形から得られる少なくとも一つの振動の基本統計量を算出し、前記診断対象の異常の有無を診断することを特徴とする振動診断装置。 - 前記振動診断装置は無線通信部を有し、前記外部は無線通信機能を有する情報端末装置である請求項1に記載の振動診断装置。
- 前記診断対象は機械部品である請求項1または2に記載の振動診断装置。
- 請求項1~3のいずれか1項に記載の振動診断装置と、
情報端末装置と、
を備える診断システムであって、
前記情報端末装置は、
前記振動診断装置との間で信号を送受信する通信部と、
前記振動診断装置から送信された前記スペクトルデータに含まれる周波数成分と、前記診断対象の損傷に起因する損傷周波数とを比較し、前記診断対象の異常を診断する診断部と、
前記診断部が診断した診断結果を出力する出力部と、
を備えることを特徴とする診断システム。 - 前記情報端末装置は、前記診断部が前記診断対象の異常を診断する場合、前記振動診断装置の前記演算処理部に対して、前記診断対象の異常の有無を診断させない設定を行うための入力信号を送信することを特徴とする請求項4に記載の診断システム。
- 前記情報端末装置は、前記診断対象の損傷に起因するパルス周波数を、前記診断対象の所定の回転速度を元に換算した損傷周波数として保存するデータベースを備え、前記損傷周波数は、前記データベースのパルス周波数を、前記診断対象の実際の回転速度を用いて計算することで与えられることを特徴とする請求項4または5に記載の診断システム。
- 前記診断対象は、軸受であり、前記データベースは、前記軸受の内輪、外輪、転動体、の損傷に起因する振動パルス周波数を、前記軸受の所定の回転速度を元に換算した軸受損傷周波数として保存し、前記パルス周波数は、前記データベースの損傷周波数を、前記診断対象の実際の回転速度を用いて計算することで与えられることを特徴とする請求項6に記載の診断システム。
- 前記診断部は、前記振動診断装置の演算処理部によるエンベロープ処理により得られたFFTスペクトルに基づき、軸受呼び番号、回転輪の回転数、軸受損傷を診断する判定レベルを変更して再診断することを特徴とする請求項7に記載の診断システム。
- 前記情報端末装置は記憶部を有し、前記振動診断装置の演算処理部によるエンベロープ処理により得られたFFTスペクトルは、前記記憶部に保存されていることを特徴とする請求項8に記載の診断システム。
- 前記振動診断装置の内部メモリに保存した振動センサで取得した振動信号をAD変換したデータを呼び出して、フィルタ処理、もしくは解析処理、又はその両方を変更して算出したエンベロープ処理後のFFTスペクトルに適用できる請求項8に記載の診断システム。
- 前記出力部は、画像表示部と音声出力部の少なくとも一方を含む請求項4~10のいずれか1項に記載の診断システム。
- 前記診断システムは複数の設備にそれぞれ設けられた前記診断対象を診断するシステムであって、前記診断対象は軸受であり、
前記診断システムは管理ソフトウェアをインストールした外部端末器をさらに有し、
前記外部端末器は、前記情報端末装置から前記波形の信号、前記スペクトルデータ、前記演算処理部の診断結果及び前記診断部の診断結果を取得して、
前記複数の設備ごとに前記振動の時間経過の傾向を管理すること、
前記スペクトルデータ及び前記波形の信号を表示すること、
前記診断部の診断結果を表示すること、
前記演算処理部の診断による異常の有無を表示すること、
前記軸受の軸受呼び番号及び回転輪の回転数を変更すると共に、前記診断部の軸受損傷診断レベルを変更して、前記診断部に再診断をさせること、
前記複数の設備を診断する際の巡回ルートの設定を行うこと、
前記傾向の管理、前記波形の信号の表示、前記診断結果の表示、前記異常の有無の表示、前記軸受呼び番号、回転輪の回転数、異常診断レベル及び巡回ルートの報告を自動作成することができることを特徴とする請求項11に記載の診断システム。
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JP2012098149A (ja) | 2010-11-02 | 2012-05-24 | Jfe Mechanical Co Ltd | 携帯型振動診断装置 |
JP2015114214A (ja) | 2013-12-12 | 2015-06-22 | Ntn株式会社 | 回転機械部品の携帯端末利用検査システムおよび検査方法 |
JP2018163178A (ja) * | 2017-03-24 | 2018-10-18 | 日本精工株式会社 | 振動分析器及び機械部品診断システム |
JP2020071040A (ja) * | 2018-10-29 | 2020-05-07 | 日本精工株式会社 | 振動解析診断システム及び振動解析診断方法 |
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JP2012098149A (ja) | 2010-11-02 | 2012-05-24 | Jfe Mechanical Co Ltd | 携帯型振動診断装置 |
JP2015114214A (ja) | 2013-12-12 | 2015-06-22 | Ntn株式会社 | 回転機械部品の携帯端末利用検査システムおよび検査方法 |
JP2018163178A (ja) * | 2017-03-24 | 2018-10-18 | 日本精工株式会社 | 振動分析器及び機械部品診断システム |
JP2020071040A (ja) * | 2018-10-29 | 2020-05-07 | 日本精工株式会社 | 振動解析診断システム及び振動解析診断方法 |
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