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JP-7857126-B2 - Noise measuring device and computer program

JP7857126B2JP 7857126 B2JP7857126 B2JP 7857126B2JP-7857126-B2

Inventors

  • 平手 利昌
  • 上地 純平
  • 西塚 善仁

Assignees

  • 東芝産業機器システム株式会社

Dates

Publication Date
20260512
Application Date
20220318

Claims (9)

  1. A mode switching unit that switches between noise measurement mode and condition input mode, A sound signal input unit that inputs the noise generated by the rotating machinery to be analyzed, and the analysis conditions for the said noise, A data storage unit where the input audio is stored as data, In the noise measurement mode, the audio input is stored in the data storage unit as noise data. A storage control unit that stores the audio input in the condition input mode as data for the analysis conditions in the data storage unit , A low-pass filter that filters the signal input from the aforementioned sound signal input section, The output terminal of this low-pass filter is equipped with a signal application unit that applies a high-frequency signal exceeding the cutoff frequency of the filter. The mode switching unit is a noise measuring device that switches modes when the high-frequency signal is input .
  2. A mode switching unit that switches between noise measurement mode and condition input mode, A sound signal input unit that inputs the noise generated by the rotating machinery to be analyzed, and the analysis conditions for the said noise, A data storage unit where the input audio is stored as data, In the noise measurement mode, the audio input is stored in the data storage unit as noise data. A storage control unit that stores the audio input in the condition input mode as data for the analysis conditions in the data storage unit, The system includes a voice recognition unit that recognizes the rotation speed, number of poles, and power supply frequency of a rotating machine as analysis conditions from the data stored in the data storage unit, The mode switching unit is also configured to allow switching to the condition registration mode. The voice recognition unit is a noise measuring device that, in the condition registration mode, can register analysis conditions input by voice as voice recognition patterns .
  3. A mode switching unit that switches between noise measurement mode and condition input mode, A sound signal input unit that inputs the noise generated by the rotating machinery to be analyzed, and the analysis conditions for the said noise, A data storage unit where the input audio is stored as data, In the noise measurement mode, the audio input is stored in the data storage unit as noise data. A storage control unit that stores the audio input in the condition input mode as data for the analysis conditions in the data storage unit, The system includes a voice recognition unit that recognizes from the data stored in the data storage unit that the noise is an abnormal sound and that the voice during the operating period is the analysis condition. The mode switching unit is also configured to allow switching to the condition registration mode. The voice recognition unit is a noise measuring device that, in the condition registration mode, can register analysis conditions input by voice as voice recognition patterns.
  4. A mode switching unit that switches between noise measurement mode and condition input mode, A sound signal input unit that inputs the noise generated by the rotating machinery to be analyzed, and the analysis conditions for the said noise, A data storage unit where the input audio is stored as data, In the noise measurement mode, the audio input is stored in the data storage unit as noise data. A storage control unit that stores the audio input in the condition input mode as data for the analysis conditions in the data storage unit, The system includes a voice recognition unit that recognizes the type of sound of the load device driven by the rotating machine from the data stored in the data storage unit as the analysis condition, The mode switching unit is also configured to allow switching to the condition registration mode. The voice recognition unit is a noise measuring device that, in the condition registration mode, can register analysis conditions input by voice as voice recognition patterns.
  5. This is performed by a computer that constitutes a noise measuring device, which includes an audio signal input unit that inputs the noise generated by the rotating machinery to be analyzed and the analysis conditions of the noise in audio, and a data storage unit that stores the input audio as data. The system switches between noise measurement mode and condition input mode, and stores the audio input in noise measurement mode as noise data in the data storage unit. The audio input in the condition input mode is stored in the data storage unit as data for the analysis conditions . When the noise measuring device includes a low-pass filter that filters the signal input from the sound signal input unit, and a signal application unit that applies a high-frequency signal exceeding the cutoff frequency of the filter to the output terminal of the low-pass filter, A computer program that switches modes when the aforementioned high-frequency signal is input .
  6. This is performed by a computer that constitutes a noise measuring device, which includes an audio signal input unit that inputs the noise generated by the rotating machinery to be analyzed and the analysis conditions of the noise in audio, and a data storage unit that stores the input audio as data. The system switches between noise measurement mode and condition input mode, and stores the audio input in noise measurement mode as noise data in the data storage unit. The audio input in the condition input mode is stored in the data storage unit as data for the analysis conditions. A computer program that, when switched to condition registration mode, registers analysis conditions entered via voice as voice recognition patterns in that condition registration mode .
  7. The computer program according to claim 5 or 6 , which causes the computer program to recognize the rotational speed, number of poles, and power supply frequency of a rotating machine as analysis conditions from the data stored in the data storage unit.
  8. A computer program according to any one of claims 5 to 7 , which recognizes from the data stored in the data storage unit that the noise is an abnormal noise and that the audio during the operating period is the analysis condition.
  9. A computer program according to any one of claims 5 to 8 , which recognizes the type of sound of a load device driven by the rotating machine as the analysis condition from the data stored in the data storage unit.

Description

Embodiments of the present invention relate to a device for measuring noise from rotating machinery, and a program executed by a computer constituting the device. When measuring and analyzing noise generated by rotating machinery such as motors, it is necessary to separately input analysis conditions such as motor specifications and driving conditions into the measuring device. Traditionally, this analysis condition information was obtained from media such as copies or photographs of the motor's nameplate, and the conditions were read and input from these sources. This led to input errors and complicated analysis work. Therefore, in recent years, information has been recorded on media readable by electronic devices such as OCR (Optical Cord Reader) or QR codes (registered trademark), making input easier. Japanese Patent Publication No. 2020-85836 This is a functional block diagram illustrating the configuration of the noise measuring device in the first embodiment.Flowchart showing data recording processA diagram showing the waveform of the measured noise data.This diagram shows the data structure stored in RIFF format in the data storage unit.Flowchart showing the data retrieval processThis is a second embodiment, and the figure shows an example of the display when keyword registration mode is enabled.Flowchart showing the keyword registration process (First Embodiment) As shown in Figure 1, the noise measuring device 1 of this embodiment is functioned by a microcomputer executing an application program downloaded to, for example, a smartphone. Analog signals such as noise generated by a rotating motor during operation and voices emitted by workers are input to the noise measuring device 1 via the microphone 2 and converted into digital data by the A/D converter 3. The sampling rate of the A/D converter 3 is set to, for example, 50 kHz. The converted data is input to the RIFF (Resource Interchange File Format) format generation unit 4 and the signal processing unit 5. The microphone 2 corresponds to the audio signal input unit. The signal processing unit 5 filters the data input from the A/D converter 3 using a digital low-pass filter 6 with a cutoff frequency of, for example, 10 kHz. A signal application unit 7 is located on the output terminal side of the filter 6. The signal application unit 7 applies a signal containing frequency components exceeding 10 kHz to the output data of the filter 6. In this embodiment, the aforementioned signal is defined as a "high-frequency signal," and its frequency is, for example, 20 kHz. The data output by the signal processing unit 5 is input to the RIFF format generation unit 4. The RIFF format generation unit 4 converts the input audio signal data into a RIFF format file. The converted file is stored in the data storage unit 8. The speech recognition processing unit 9 performs FFT (First Fourier Transform) processing and other operations on the audio signal data stored in the data storage unit 8, and then performs speech recognition processing. The smartphone's display unit 10, as is well known, also has a touch panel function, and operation buttons such as "Start," "Record," "Condition," "Image," and "Stop" are displayed as images. "Record" and "Condition" are mode switching buttons. The mode switching time recording unit 11 records the time when the "Record" operation button on the display unit 10 is operated, and then the "Condition" button is operated, and inputs the time data to the RIFF format generation unit 4. The image data acquisition unit 12 inputs the image data captured by the smartphone's image sensor (not shown) to the RIFF format generation unit 4 when the "Image" operation button on the display unit 10 is operated. Furthermore, when the signal application unit 7 receives a trigger signal from the mode switching time recording unit 11 to record the time when the "condition" was manipulated, it applies a high-frequency signal to the output data of the filter 6. Next, the operation of this embodiment will be described. Figure 2 is a flowchart showing the recording process. Measurement begins when the operator presses the "Start" button on the display unit 10. Subsequently, when the "Record" button is pressed (S1; YES), the sound signal input from the microphone 2 is recorded (S2). If motor noise or other sounds are recorded, the digital data of the sound signal; the noise data, is stored in the data storage unit 8. The storage control unit that stores the data in the data storage unit 8 is equivalent to the microcomputer installed in the smartphone. If the "Condition" button is pressed (S3; YES), the mode switching time recording unit 11 stores the timing of the press as the condition timing; mode switching time (S8) and then returns to step S2. If the "Image" button is pressed (S4; YES), the timing of the press is stored as the image timing (S9) and then returns to step S2. Here, the state where the loop of steps S2 → S3 → S8 → S2 →… is repeated corres