JP2024039371A - Motor inspection device, motor inspection method, and motor inspection program - Google Patents

Abstract

To provide a motor inspection device with which it is possible to suppress an increase in calculation amount and inspect a motor for abnormality while changing the number of revolutions of the motor without changing waveforms.SOLUTION: Provided is a motor inspection device comprising: a first data acquisition unit that acquires data on a motor's sound or vibration; a second data acquisition unit that acquires data of the motor's revolution speed; a creation unit that divides the data on the sound or vibration acquired by the first data acquisition unit for each prescribed section and extracts a plurality of first section data, and that creates a spectrogram that indicates a relationship between the strength, frequency and time of sound or vibration on the basis of the plurality of first section data; and a calculation unit that divides the data of the revolution speed acquired by the second data acquisition unit for each prescribed section, extracts a plurality of second section data, and converts the frequency to a rotational order on the basis of the spectrogram created by the creation unit and the plurality of second section data, and that calculates a value that represents the strength of sound or vibration for use in the inspection of the motor for each rotational order.SELECTED DRAWING: Figure 1

Description

The present invention relates to a motor inspection device, a motor inspection method, and a motor inspection program that inspect a motor while changing the rotational speed of the motor.

Conventionally, in motor noise inspection, in order to inspect abnormal noise caused by periodic contact, the frequency and amplitude of abnormal noise are obtained by using envelope analysis, which analyzes the frequency of the envelope of the sound pressure waveform. . Then, by comparing the acquired generation period and magnitude of the abnormal noise with a threshold value, it is possible to test whether there is a periodic abnormal noise. Furthermore, in the noise inspection of a traction motor, a sweep inspection is performed in which the rotational speed is accelerated or decelerated in order to inspect for abnormal noise with respect to a rotational order representing a frequency synchronized with the rotational speed of the motor.

Patent Document 1 discloses a method of normalizing rotational speed data by extending a time interval, interpolating the normalized signal, and performing envelope analysis when measuring vibrations of a motor whose rotational speed is not constant.

Japanese Patent Application Publication No. 2015-57944

However, in Patent Document 1, the waveform changes due to interpolation. Furthermore, in Patent Document 1, when extending the time interval by dividing sections, discontinuity of the waveform occurs at the division of the sections, and calculations are required for each section, which increases the amount of calculation. There is a problem of storing it away.

SUMMARY OF THE INVENTION An object of the present invention is to suppress an increase in the amount of calculation, and to inspect a motor for abnormalities while changing the rotation speed of the motor without changing the waveform. and motor inspection programs.

A motor inspection device according to the present invention is a motor inspection device that inspects the motor while changing the rotation speed of the motor, and includes a first data acquisition unit that acquires sound or vibration data of the motor; a second data acquisition unit that acquires rotational speed data; and a second data acquisition unit that divides the sound or vibration data acquired by the first data acquisition unit into predetermined intervals to extract a plurality of first interval data, and extracts a plurality of first interval data. a creation unit that creates a spectrogram showing the relationship between the intensity, frequency, and time of the sound or vibration based on the first interval data; and a creation unit that creates a spectrogram indicating the relationship between the intensity, frequency, and time of the sound or vibration, and the rotational speed data acquired by the second data acquisition unit for each of the predetermined intervals. The frequency is divided to extract a plurality of second interval data, and the frequency is converted into a rotational order based on the spectrogram created by the creation unit and the plurality of second interval data, and the frequency of the motor is divided for each rotational order. and a calculation unit that calculates a value representing the intensity of the sound or vibration for use in testing.

A motor inspection method according to the present invention is a motor inspection method for inspecting the motor while changing the rotational speed of the motor, and includes a first data acquisition step of acquiring sound or vibration data of the motor; a second data acquisition step of acquiring rotational speed data; and dividing the sound or vibration data acquired in the first data acquisition step into predetermined sections to extract a plurality of first section data, and extracting a plurality of first section data. a creation step of creating a spectrogram showing the relationship between sound intensity, frequency, and time based on the first section data; and dividing the rotational speed data acquired in the second data acquisition step into each of the predetermined sections. Extracting a plurality of second section data, converting the frequency into a rotational order based on the spectrogram created in the creation step and the plurality of second section data, and using each rotational order to inspect the motor. a calculation step of calculating a value representing the intensity of the sound or vibration.

A motor inspection program according to the present invention includes a first data acquisition step of acquiring sound or vibration data of the motor when inspecting the motor while changing the rotation speed of the motor; a second data acquisition step of acquiring speed data; and dividing the sound or vibration data acquired in the first data acquisition step into predetermined sections to extract a plurality of first section data, and extracting a plurality of first section data. a creation step of creating a spectrogram showing the relationship between sound intensity, frequency, and time based on one section data; and a step of creating a spectrogram showing the relationship between sound intensity, frequency, and time based on one section data, and dividing the rotational speed data acquired in the second data acquisition step into plural sections for each of the predetermined sections. extracting the second section data, converting the frequency into a rotational order based on the spectrogram created in the creation step and the plurality of second section data, and using it for inspecting the motor for each rotational order. calculating a value representing the intensity of the sound or vibration.

According to the present invention, it is possible to suppress an increase in the amount of calculation, and it is also possible to inspect the motor for abnormality while changing the rotation speed of the motor without changing the waveform.

1 is a block diagram showing the configuration of a motor inspection device according to an embodiment of the present invention. FIG. 3 is a flow diagram showing a motor inspection method according to an embodiment of the present invention. It is a figure showing an example of the data of the sound or vibration of the motor acquired by data acquisition processing of the motor inspection method concerning an embodiment of the present invention. It is a figure showing an example of data of the rotational speed of the motor acquired by data acquisition processing of the motor inspection method concerning an embodiment of the present invention. It is a figure showing section extraction processing of a motor inspection method concerning an embodiment of the present invention. It is a figure showing spectrogram calculation processing of a motor inspection method concerning an embodiment of the present invention. FIG. 3 is a diagram showing rotational speed calculation processing of the motor inspection method according to the embodiment of the present invention. It is a figure showing order information conversion processing of a motor inspection method concerning an embodiment of the present invention. It is a figure showing representative value calculation processing of a motor inspection method concerning an embodiment of the present invention. It is a figure showing the spectrum of the envelope analysis result acquired by representative value calculation processing of the motor inspection method concerning an embodiment of the present invention. It is a figure showing the display screen of the display part of the motor inspection device concerning an embodiment of the present invention. FIG. 3 is a diagram showing a result display table stored in the storage unit of the motor inspection device according to the embodiment of the present invention. FIG. 3 is a diagram showing a Mode table stored in the storage unit of the motor inspection device according to the embodiment of the present invention. FIG. 3 is a diagram showing a Setup table stored in the storage unit of the motor inspection device according to the embodiment of the present invention. 1 is a diagram showing the configuration of a functional module of a motor inspection device according to an embodiment of the present invention. FIG. 2 is a diagram showing the configuration of an application stored in a storage unit of a motor inspection device according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a motor inspection device, a motor inspection method, and a motor inspection program according to exemplary embodiments of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments, and can be arbitrarily modified within the scope of the technical idea of the present invention. Further, in the following drawings, in order to make each structure easier to understand, the scale, number, etc. of each structure may be different from the scale, number, etc. of the actual structure.

<Configuration of motor inspection device>
The configuration of a motor inspection device 1 according to an embodiment of the present invention will be described in detail with reference to FIG. 1.

The motor inspection device 1 inspects a motor while changing the rotational speed of the motor (not shown). The motor inspection device 1 includes a first data acquisition section 2, a second data acquisition section 3, a storage section 4, an operation section 5, a processor 6, and a display section 7.

The first data acquisition unit 2 is a sensor such as a microphone and an accelerometer, and acquires sound or vibration data of the motor, and outputs the acquired sound or vibration data to the creation unit 61 of the processor 6 .

The second data acquisition section 3 acquires data on the rotational speed of the motor, and outputs the acquired rotational speed data to the calculation section 62 of the processor 6 .

The storage unit 4 stores in advance control programs, applications, settings for each type of motor, and various tables. Furthermore, the storage unit 4 can store data/information created by the creation unit 61 and data/information calculated by the calculation unit 62.

The operation unit 5 is composed of a keyboard, a mouse, switches, buttons, etc. that are operated by the user of the motor inspection device 1. The user of the motor inspection device 1 can select the type of motor by operating the operation unit 5. The operation unit 5 outputs an electric signal to the processor 6 in accordance with an operation for selecting the type of motor.

The processor 6 controls the operation of the motor inspection device 1 by reading and executing a control program stored in the storage unit 4 . The processor 6 includes a creation section 61 and a calculation section 62. The processor 6 includes, for example, one or more CPUs (Central Processing Units) or MPUs (Micro-Processing Units).

The creation unit 61 divides the sound or vibration data input from the first data acquisition unit 2 into predetermined intervals, and extracts a plurality of first interval data. The creation unit 61 creates a spectrogram showing the relationship between the intensity, frequency, and time of sound or vibration based on the plurality of extracted first section data. The creation unit 61 outputs the created spectrogram (spectrogram information) to the calculation unit 62.

The calculation unit 62 divides the rotational speed data input from the second data acquisition unit 3 into predetermined intervals, and extracts a plurality of second interval data. The calculation unit 62 converts the frequency of the spectrogram into a rotation order based on the spectrogram of the spectrogram information input from the creation unit 61 and the extracted plurality of second interval data. The calculation unit 62 calculates a value representing the intensity of sound or vibration for use in motor inspection for each converted rotation order. At this time, the calculation unit 62 calculates a value representing the intensity of the sound or vibration in the storage unit 4 according to the setting associated with the type of motor indicated by the electric signal input from the operation unit 5. The calculation unit 62 controls the display unit 7 to display the calculated value indicating the intensity of sound or vibration.

The display section 7 is composed of a liquid crystal display or the like. Under the control of the calculation unit 62, the display unit 7 displays a graphical user interface for displaying motor inspection results, etc., and also displays a value representing the intensity of motor sound or vibration as the motor inspection result. The display unit 7 displays a screen having a predetermined configuration under the control of the calculation unit 62. Note that the screen configuration displayed on the display unit 7 will be described later. Note that although the display section 7 and the operation section 5 are shown as separate elements in FIG. 1, they may be integrated.

<Motor inspection method>
A motor inspection method according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 8B.

First, the processor 6 executes a data acquisition process of acquiring sound or vibration data of the motor and acquiring data of the rotational speed of the motor while driving the motor (S1).

Specifically, the creation unit 61 acquires the sound or vibration data of the motor as shown in FIG. 3A from the first data acquisition unit 2, and the calculation unit 62 accelerates the rotational speed of the motor from the second data acquisition unit 3. Or acquire data on the rotational speed of the motor while decelerating it. FIG. 3B shows, as an example, a case where the calculation unit 62 acquires data on the rotational speed of the motor from the second data acquisition unit 3 while decelerating the rotational speed of the motor.

Next, the processor 6 executes a section extraction process to obtain extraction data t ₁ , t ₂ , . . . , t _n based on the sound or vibration data acquired by the data acquisition process (S2).

Specifically, as shown in FIG. 4, the creation unit 61 converts motor sound or vibration data, which is time series data acquired from the first data acquisition unit 2 in the data acquisition process, to frequency analysis. Extracted data t ₁ , t ₂ , . . . , t _n are obtained by dividing into arbitrary sections of window width W1. Here, the window width W1 is determined according to the maximum value of the frequency to be analyzed. At this time, _the creation unit 61 creates each of the extracted data _{t 1 , t 2 ,} . By overlapping _n by an overlap width _O1 , they are overlapped at a predetermined ratio.

Next, the processor 6 performs envelope analysis on the extracted data t ₁ , t _{2 ,} . Spectrogram calculation processing for creating a spectrogram representing the intensity of is executed (S3).

Specifically, the creation unit 61 performs envelope processing to obtain the outline of the amplitude for each of the obtained extracted data t ₁ , t ₂ , . . . , t _n . The creation unit 61 multiplies the processing results of the envelope processing of each extracted data t ₁ , t _{2 ,} . Create a spectrogram that represents the sound intensity with respect to the fluctuation period (fluctuation frequency). Note that in FIG. 5, the intensity of sound is shown in shading.

Next, the processor 6 executes a rotation speed calculation process to obtain extracted data p ₁ , p ₂ , . . . , p _n based on the motor rotation speed data acquired through the data acquisition process (S4).

Specifically, as shown in FIG. 6, the calculation unit 62 divides and extracts the motor rotational speed data acquired by the second data acquisition unit 3 in the data acquisition process into arbitrary sections of the window width W1. Data p ₁ , p ₂ , . . . , p _n are obtained. At this time, _the calculation unit 62 calculates each extracted data _{p 1 , p 2} , . By overlapping _n by an overlap width _O1 , they are overlapped at a predetermined ratio. Here, the window width W1 that divides the motor rotation speed data is the same as the window width W1 that divides the motor sound or vibration data. In addition, the overlap width O 1 that causes each extraction data p ₁ , p ₂ , ..., p _n to overlap is the overlap width O ₁ that causes each extraction data t ₁ , t ₂ , ..., t _n to overlap. Same as _O1 . Further, the calculation unit 62 calculates representative values q ₁ , q ₂ , . . . , q _n of the rotational speed for each extracted data p ₁ , p ₂ , . . . , p _n . The representative values q ₁ , q ₂ , . . . , q _n are, for example, average values or percentile values.

Next, the processor 6 executes an order information conversion process to obtain a spectrogram representing the sound intensity with respect to time and rotation order based on the spectrogram obtained by the spectrogram calculation process (S5).

Specifically, the calculation unit 62 uses representative values q ₁ , q ₂ , . . . , q _n of rotation speeds obtained in the rotation speed calculation process for the spectrogram obtained in the spectrogram calculation process. to convert the fluctuating frequency into a rotational order. The calculation unit 62 converts the fluctuating frequency into a rotational order by dividing the fluctuating frequency [Hz] by the representative values q ₁ , q ₂ , . . . , q _n [rpm/60] of the rotational speed, for example. As a result, the calculation unit 62 obtains a spectrogram representing the sound intensity with respect to time and rotation order as shown in FIG. 7 . In FIG. 7, the intensity of the sound is shown in shading.

Next, the processor 6 executes a representative value calculation process to obtain a spectrum of the envelope analysis result based on the spectrogram obtained by the order information conversion process (S6).

Specifically, the calculation unit 62 obtains order data r ₁ , r ₂ , . . . , r _n that are representative values of the sound intensity of each rotation order in the spectrogram obtained in the order information conversion process. For example, the calculation unit 62 uses the maximum value or percentile value of the sound intensity as the representative value. Then, the calculation unit 62 obtains a spectrum of the envelope analysis result as shown in FIG. 8B based on the obtained order data r ₁ , r ₂ , . . . , r _n .

Then, the calculation unit 62 compares the threshold value with the representative value of the obtained order data r ₁ , r ₂ , ..., r _n in the spectrum of the envelope analysis result obtained by the representative value calculation process, and calculates the threshold value. If there is a representative value that exceeds the standard value, it is determined that there is abnormal noise in the motor. The calculation unit 62 displays the determination result of whether or not there is abnormal noise in the motor on the display unit 7 as an inspection result.

<Screen configuration displayed on the display section>
The screen configuration displayed on the display unit 7 of the motor inspection device 1 according to the embodiment of the present invention will be described in detail with reference to FIGS. 9 to 12.

The motor inspection device 1 causes the display unit 7 to display two screens, a main screen 70 and an operation screen 73 or 74.

The main screen 70 displays a waveform display section 71 as a waveform display area that performs a common display in each mode, which will be described later, and a result display section 72 as a result display area that arbitrarily changes the display for each mode. Ru.

The result display section 72 displays a display screen that is associated with the name selected by the result display selection section 73c or the result display selection section 74c in the result display table shown in FIG. 10 stored in the storage section 4. be done. For example, when a spectrum is selected by the result display selection section 73c, the result display section 72 displays a display screen that is associated with the spectrum in the result display table shown in FIG.

In this way, the motor inspection device 1 can display a unique display screen for each mode and a common display screen for each mode on the main screen 70 in accordance with the mode.

The operation screen 73 is a graphical user interface displayed on the display unit 7 to display the mode screen for acoustic analysis on the display unit 7, and the operation screen 74 is a graphical user interface for displaying the mode screen for noise inspection on the display unit 7. This is a graphical user interface displayed on the display unit 7 to perform the operations.

The operation screen 73 displays a Mode selection section 73a, a Setup selection section 73b, and a result display selection section 73c.

In the operation screen 73, when the Mode selection section 73a is selected, the acoustic analysis screen is displayed on the display section 7, and parameters can be selected by selecting Setup using the Setup selection section 73b. The display screen displayed on the result display section 72 can be selected by the section 73c. In FIG. 9, the result display selection section 73c displays "Spectrum" as the name of the result display table. Therefore, when the result display selection section 73c is selected, the display screen (number 1) associated with the spectrum in the result display table shown in FIG. 10 is displayed on the result display section 72.

The operation screen 74 displays a Mode selection section 74a, a Setup selection section 74b, and a result display selection section 74c.

In the operation screen 74, when the Mode selection section 74a is selected, the noise test screen is displayed on the display section 7, and parameters can be selected by selecting Setup using the Setup selection section 74b. The display screen displayed on the result display section 72 can be selected by the section 73c. In FIG. 9, the test results are displayed in the result display selection section 74c as the name of the result display table. Therefore, when the result display selection section 74c is selected, the display screen (number 3) associated with the test result in the result display table shown in FIG. 10 is displayed on the result display section 72.

In this way, the Mode selection section 73a and the Mode selection section 74a enable switching of the screen displayed on the display section 7. Thereby, the independence of the Modes can be ensured, and optimal operability matching the purpose of use of the Modes can be realized.

Various functions executed using the operation screen 73 and the operation screen 74 are realized in units called function modules 80. As shown in FIG. 12, the function module 80 includes an API 81 for executing the function, an internal function 82 for executing the function, a setting screen 83 for parameters necessary for executing the function, and a setting file. 84 is included.

The setting screen 83 is displayed on the display section 7 in order to set parameters according to the type of motor selected by the operation section 5. Parameters set on the settings screen 83 are managed by a settings file 84.

The configuration file 84 is a separate file for each Mode, and uses the Mode table and Setup table stored in the storage unit 4 in order to be able to set multiple parameters even for the same Mode. . As shown in FIG. 11A, the Mode table is a table that associates a Mode name representing a name of a Mode with a Mode number identifying the Mode. Further, the Setup table is a table in which Mode numbers, Setup names, and Setup numbers are associated with each other, as shown in FIG. 11B.

Any name can be given to the Setup name, and it is used to identify the parameter. The configuration file 84 can hold a plurality of parameter sets for each mode by naming the file "Setup name_Mode number_Setup number." Thereby, for example, when a product to be tested in a noise test is changed, parameters in the test can be easily changed.

<Application configuration>
The configuration of the application stored in the storage unit 4 of the motor inspection device 1 according to the embodiment of the present invention will be described in detail with reference to FIG. 13.

The application is used to display a screen having the screen configuration shown in FIG. 9 on the display unit 7, and includes a main control unit 90, an operation screen, and a function module 80.

The main control section 90 includes a main screen control section 91, a Mode management section 92, and a Setup management section 93.

The main screen control section 91 performs display switching and display processing on the result display section 72 and display processing on the waveform display section 71.

The Mode management section 92 causes the display section 7 to display the operation screen 73 or the operation screen 74 of the Mode selected by the operation section 5 .

The Setup management section 93 provides the functional module 80 with information on the Setup selected by the Setup selection section 73b or the Setup selection section 74b. The Setup management section has a function of adding or deleting Setups.

The operation screen includes an operation screen 73 for performing acoustic analysis and an operation screen 74 for performing noise inspection. The operation screen executes each function of the functional module 80 according to the operation.

The functional module 80 performs various functional processes in accordance with the operation of selecting the operation screen 73 or the operation screen 74, and displays the setting screen 83 on the display unit 7. The functional module 80 reads the configuration file 84 according to the selection of Mode and Setup.

In the application having the above configuration, by calling a function corresponding to the operation of selecting the operation screen 73 or the operation screen 74 and realizing the called function in the function module 80, commonization of functions and setting screens is realized. be able to. For example, this application calls each function of measurement, frequency analysis, audio playback, and order analysis in response to an operation of selecting the operation screen 73, and implements each of the called functions in the function module 80.

In addition, by realizing a plurality of Modes with one application, it is possible to share displays and functions while ensuring operability tailored to the purpose of use. As a result, it is possible to provide users with easy-to-use applications that can be used in a variety of usage scenarios.

Incidentally, in the past, in the manufacturing of motors, various acoustic applications were used depending on the purpose of use, such as acoustic analysis applications that analyze the operating sound of products during development, and noise inspection applications that inspect abnormal noises during production processes. It was used individually.

However, when using multiple applications depending on the purpose of use, a lot of time is required to understand how to use each application. Additionally, there are various differences in display, operability, and functionality between applications, making them difficult to use.

In contrast, in this embodiment, a plurality of various applications with different purposes of use can be implemented with one application. In such an application, it is possible to standardize the display and operability for the same type of functions, and to realize operability according to the purpose of use.

The above processing is performed by recording a program for realizing the functions of the motor inspection device 1 of this embodiment on a computer-readable recording medium, and causing the computer system to read and execute the program recorded on the recording medium. may be done.

As described above, according to the present embodiment, data on the sound or vibration of the motor is divided into predetermined sections to extract a plurality of first section data, and the intensity of the sound or vibration is calculated based on the plurality of first section data. In addition to creating a spectrogram that shows the relationship between frequency and time, the motor rotational speed data is divided into predetermined intervals to extract a plurality of second interval data, and the created spectrogram and the plurality of second interval data are By converting the frequency into a rotational order based on the rotational order and calculating a value representing the intensity of sound or vibration for use in motor inspection for each rotational order, it is possible to suppress an increase in the amount of calculation, and also to reduce the waveform. It is possible to inspect the motor for abnormalities while changing the rotation speed of the motor without changing it.

Note that the present technology can have the following configuration.

(1) A motor inspection device that inspects the motor while changing the rotation speed of the motor, the first data acquisition unit acquiring data on sound or vibration of the motor, and acquiring data on the rotation speed of the motor. a second data acquisition unit that divides the sound or vibration data acquired by the first data acquisition unit into predetermined intervals to extract a plurality of first interval data, and based on the plurality of first interval data; a creation unit that creates a spectrogram showing the relationship between the intensity, frequency, and time of the sound or vibration; and a creation unit that creates a spectrogram showing the relationship between the intensity, frequency, and time of the sound or vibration; and a creation unit that divides the rotational speed data acquired by the second data acquisition unit into a plurality of extracting two-section data, converting the frequency into a rotation order based on the spectrogram created by the creation unit and the plurality of second section data, and converting the frequency into a rotation order for use in inspecting the motor for each rotation order. A motor inspection device comprising: a calculation unit that calculates a value representing the intensity of sound or vibration.

(2) The motor inspection device according to (1), wherein the creation unit creates the spectrogram by performing envelope processing and Fourier transformation on the plurality of first section data.

(3) The creation unit extracts the plurality of first interval data by overlapping the predetermined intervals at a predetermined ratio, and the calculation unit extracts the plurality of first interval data by overlapping the predetermined intervals at a predetermined ratio. The motor inspection device according to (1) or (2), which extracts second section data of.

(4) The motor according to any one of (1) to (3), wherein the calculation unit calculates the maximum value or percentile value of the intensity for each rotation order as a value representing the intensity of the sound or vibration. Inspection equipment.

(5) The motor inspection device according to any one of (1) to (4), further comprising a display section that displays a value representing the intensity of the sound or vibration as an inspection result.

(6) The motor inspection device according to (5), wherein the display section displays a graphical user interface for displaying the inspection results.

(7) The display unit displays a waveform display area that displays a waveform of the sound or vibration data acquired by the first data acquisition unit, and a result display area that displays the test results. ) or the motor inspection device described in (6).

(8) The calculation unit includes a storage unit that stores settings for each type of motor, and an operation unit that can select the type, and the calculation unit stores settings for each type of motor in the storage unit. The motor inspection device according to any one of (1) to (7), which calculates a value representing the intensity of the sound or vibration according to the stored settings.

(9) A motor inspection method of inspecting the motor while changing the rotation speed of the motor, the first data acquisition step of acquiring sound or vibration data of the motor, and acquiring data of the rotation speed of the motor. and dividing the sound or vibration data acquired in the first data acquisition step into predetermined sections to extract a plurality of first section data, and based on the plurality of first section data. a creation step of creating a spectrogram showing the relationship between sound intensity, frequency, and time, and dividing the rotational speed data acquired in the second data acquisition step into each of the predetermined intervals to generate a plurality of second interval data. and converting the frequency into a rotational order based on the spectrogram and the plurality of second section data created in the creation step, and converting the sound or vibration for use in inspecting the motor for each rotational order. A calculation step of calculating a value representing the strength of the motor.

(10) A first data acquisition step of acquiring sound or vibration data of the motor when inspecting the motor while changing the rotation speed of the motor, and acquiring data of the rotation speed of the motor in a computer; a second data acquisition step, and dividing the sound or vibration data acquired in the first data acquisition step into predetermined sections to extract a plurality of first section data, and based on the plurality of first section data; a creation step of creating a spectrogram showing the relationship between sound intensity, frequency, and time, and dividing the rotational speed data acquired in the second data acquisition step into each of the predetermined intervals to obtain a plurality of second interval data. The frequency is extracted and converted into a rotational order based on the spectrogram and the plurality of second section data created in the creation step, and the sound or vibration is extracted for each rotational order for use in inspecting the motor. A motor inspection program that executes a calculation step of calculating a value representing strength.

The embodiments described above should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the embodiments described above, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Motor inspection device 2 First data acquisition section 3 Second data acquisition section 4 Storage section 5 Operation section 6 Processor 7 Display section 61 Creation section 62 Calculation section 70 Main screen 71 Waveform display section 72 Result display section 73 Operation screen 73a Mode selection Section 73b Setup selection section 73c Result display selection section 74 Operation screen 74a Mode selection section 74b Setup selection section 74c Result display selection section 80 Function module 81 API
82 Internal functions 83 Setting screen 84 Setting file 90 Main control section 91 Main screen control section 92 Mode management section 93 Setup management section

Claims (10)

A motor inspection device that inspects the motor while changing the rotation speed of the motor,
a first data acquisition unit that acquires sound or vibration data of the motor;
a second data acquisition unit that acquires data on the rotational speed of the motor;
The sound or vibration data acquired by the first data acquisition unit is divided into predetermined sections to extract a plurality of first section data, and the intensity of the sound or vibration is determined based on the plurality of first section data. a creation unit that creates a spectrogram showing the relationship between frequency and time;
The rotational speed data acquired by the second data acquisition unit is divided into the predetermined intervals, a plurality of second interval data are extracted, and the spectrogram and the plurality of second interval data created by the creation unit are combined. a calculation unit that converts the frequency into a rotational order based on the rotational order and calculates a value representing the intensity of the sound or vibration for use in inspecting the motor for each rotational order;
A motor inspection device with The creation department is
creating the spectrogram by enveloping and Fourier transforming the plurality of first section data;
A motor inspection device according to claim 1. The creation department is
extracting the plurality of first section data by overlapping the predetermined sections at a predetermined ratio;
The calculation unit is
extracting the plurality of second section data by overlapping the predetermined sections at a predetermined ratio;
A motor inspection device according to claim 1 or claim 2. The calculation unit is
Calculating the maximum value or percentile value of the intensity for each rotation order as a value representing the intensity of the sound or vibration;
A motor inspection device according to claim 1 or 2. comprising a display unit that displays a value representing the intensity of the sound or vibration as a test result;
A motor inspection device according to claim 1 or 2. The display section is
displaying a graphical user interface for displaying the test results;
A motor inspection device according to claim 5. The display section is
Displaying a waveform display area that displays a waveform of the sound or vibration data acquired by the first data acquisition unit, and a result display area that displays the test results.
A motor inspection device according to claim 5. a storage unit that stores settings for each type of motor;
an operation unit that can select the type;
has
The calculation unit is
calculating a value representing the intensity of the sound or vibration according to the setting stored in the storage unit of the type selected by the operation unit;
A motor inspection device according to claim 1 or claim 2. A motor inspection method for inspecting the motor while changing the rotation speed of the motor, the method comprising:
a first data acquisition step of acquiring sound or vibration data of the motor;
a second data acquisition step of acquiring data on the rotational speed of the motor;
The sound or vibration data acquired in the first data acquisition step is divided into predetermined sections to extract a plurality of first section data, and the intensity, frequency, and time of the sound are extracted based on the plurality of first section data. a creation step of creating a spectrogram showing the relationship between
The rotational speed data acquired in the second data acquisition step is divided into the predetermined intervals to extract a plurality of second interval data, and the spectrogram and the plurality of second interval data created in the creation step are a calculation step of converting the frequency into a rotational order based on the rotational order and calculating a value representing the intensity of the sound or vibration for use in inspecting the motor for each rotational order;
A motor inspection method having to the computer,
a first data acquisition step of acquiring sound or vibration data of the motor when inspecting the motor while changing the rotational speed of the motor;
a second data acquisition step of acquiring data on the rotational speed of the motor;
The sound or vibration data acquired in the first data acquisition step is divided into predetermined sections to extract a plurality of first section data, and the intensity, frequency, and time of the sound are extracted based on the plurality of first section data. a creation step of creating a spectrogram showing the relationship between
The rotational speed data acquired in the second data acquisition step is divided into the predetermined intervals to extract a plurality of second interval data, and the spectrogram and the plurality of second interval data created in the creation step are a calculation step of converting the frequency into a rotational order based on the rotational order and calculating a value representing the intensity of the sound or vibration for use in inspecting the motor for each rotational order;
A motor inspection program that runs the motor inspection program.

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