Operation monitoring system, operation monitoring apparatus, method, program, and storage medium

Abstract

To determine an operation state of an apparatus by a sound generation mechanism provided in the apparatus to be monitored.SOLUTION: An operation monitoring system that monitors operation states of a plurality of devices includes a first sound generating mechanism that is provided in a first device and emits a first sound in accordance with driving of a driving unit of the first device, a second sound generating mechanism that is provided in a second device different from the first device and emits a second sound having a frequency different from that of the first sound in accordance with driving of a driving unit of the second device, a sound collecting unit that collects sounds including the first sound and the second sound, an analyzing unit that analyzes the sounds collected by the sound collecting unit, a determining unit that determines the operation states of the first device and the second device based on a result of the analysis by the analyzing unit, and an output unit that outputs a result of the determination by the determining unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an operation monitoring system, an operation monitoring device, a method, a program, and a storage medium. [Background technology]

[0002] Conventionally, a monitoring device is known that generates an acoustic map showing the relationship between the positions of multiple sound sources included in a monitored area and the sound pressure of each sound source, and diagnoses abnormalities in a rotating machine based on the sound pressure level of the sound generated by the rotating machine (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7261325 Summary of the Invention [Problem to be solved by the invention]

[0004] However, up to now, there has been no proposal to provide a mechanism for emitting sound (sound generating mechanism) in the equipment to be monitored in order to monitor the operating state.

[0005] The problem to be solved by the present invention is to determine the operating state of a device to be monitored by using a sound generating mechanism provided in the device. [Means for solving the problem]

[0006] [1] An operation monitoring system according to one aspect of the present invention comprises: An operation monitoring system that monitors the operation states of a plurality of devices, a first sound generating mechanism provided in the first device, which generates a first sound in response to driving of a driving unit of the first device; a second sound generating mechanism provided in a second device different from the first device, the second sound generating mechanism emitting a second sound having a frequency different from the first sound in response to driving of a drive unit of the second device; a sound collection unit that collects sounds including the first sound and the second sound; an analysis unit that analyzes the sound collected by the sound collection unit; a determination unit that determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit; an output unit that outputs the result determined by the determination unit; Equipped with.

[0007] [2] An operation monitoring system according to one aspect of the present invention is the above-mentioned [1], the first device and the second device are rotating devices, the first sound generating mechanism and the second sound generating mechanism are provided on a rotating body that rotates in conjunction with the rotational drive of the drive unit, and include a first blowing unit and a second blowing unit that blow sound by utilizing an airflow generated by the rotation of the rotating body, The first sounding unit and the second sounding unit emit the first sound and the second sound, respectively.

[0008] [3] An operation monitoring system according to one aspect of the present invention is the above-mentioned [2], the first sound generating mechanism includes a first intermittent sound generating mechanism that intermittently generates a third sound in accordance with the rotation period of the rotating body, The second sound generating mechanism includes a second intermittent sound generating mechanism that generates a fourth sound having a frequency different from that of the third sound intermittently in accordance with the rotation period of the rotating body.

[0009] [4] An operation monitoring system according to one aspect of the present invention is the above-mentioned [3], The sounds collected by the sound collection unit further include the third sound and the fourth sound, The analysis unit calculates the rotation speed of the rotating body of the first device by analyzing the third sound, and calculates the rotation speed of the rotating body of the second device by analyzing the fourth sound.

[0010] [5] An operation monitoring system according to one aspect of the present invention is any one of the above [1] to [4], The analysis unit performs a fast Fourier transform on the sound collected by the sound collection unit, The determination unit determines that the operating state of the first device is in operation if the sound pressure level of the frequency corresponding to the first sound exceeds a threshold in the sound collection data after the fast Fourier transform, and determines that the operating state of the second device is in operation if the sound pressure level of the frequency corresponding to the second sound exceeds a threshold.

[0011] [6] An operation monitoring system according to one aspect of the present invention is any one of the above [1] to [4], the analysis unit applies a first band-pass filter corresponding to a frequency of the first sound and a second band-pass filter corresponding to a frequency of the second sound to the sound collected by the sound collection unit; The determination unit determines that the operating state of the first device is in operation when the sound pressure level of the sound collection data after applying the first bandpass filter exceeds a threshold, and determines that the operating state of the second device is in operation when the sound pressure level of the sound collection data after applying the second bandpass filter exceeds a threshold.

[0012] [7] An operation monitoring system according to one aspect of the present invention is any one of the above [1] to [6], The sounds emitted by the first sound generating mechanism and the second sound generating mechanism are ultrasonic waves.

[0013] [8] An operation monitoring system according to one aspect of the present invention is any one of the above [1] to [7], The vehicle further includes a driving condition recording unit that records the result of the determination output by the output unit as a driving history.

[0014] [9] An operation monitoring system according to one aspect of the present invention is any one of the above [1] to [8], The apparatus further includes a display control unit that displays the result of the determination output by the output unit.

[0015]

[10] An operation monitoring device according to one aspect of the present invention comprises: An operation monitoring device that monitors the operation states of multiple devices, an analysis unit that analyzes sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound, generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; a determination unit that determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit; an output unit that outputs the result determined by the determination unit; Equipped with.

[0016]

[11] A method according to one aspect of the present invention comprises: 1. A computer-implemented method for monitoring the operational status of a plurality of pieces of equipment, comprising: a step of analyzing sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; determining the operating states of the first device and the second device based on the results of the analysis; outputting the result of the determination; It has.

[0017]

[12] A program according to one aspect of the present invention comprises: A program for causing a computer to execute a method for monitoring the operating states of a plurality of devices, the method comprising: a step of analyzing sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; determining the operating states of the first device and the second device based on the results of the analysis; outputting the result of the determination; It has.

[0018]

[13] A storage medium according to one aspect of the present invention includes: A computer-readable storage medium storing the program described in

[12] above. [Effects of the Invention]

[0019] According to one aspect of the present invention, the operating state of a device to be monitored can be determined, displayed, and recorded by a sound generating mechanism provided in the device. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a diagram showing a schematic configuration of an operation monitoring system according to an embodiment of the present invention; [Figure 2] 1 is a diagram illustrating an example of a hardware configuration of an operation monitoring device according to an embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating an example of an operation monitoring method according to an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram showing a modified example of the operation monitoring system according to the present embodiment. [Figure 5] FIG. 2 is a diagram illustrating an example of a schematic configuration of a sound generating mechanism according to the present embodiment. [Figure 6] FIG. 10 is a diagram illustrating another example of the schematic configuration of the sound generating mechanism according to the present embodiment. [Figure 7] 1 is a diagram showing an example of a schematic configuration of a sound generating mechanism having an intermittent sound generating mechanism according to an embodiment of the present invention; [Figure 8] 10A and 10B are diagrams illustrating another example of the schematic configuration of a sound generating mechanism having an intermittent sound generating mechanism according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, each embodiment will be described with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art.

[0022] (Configuration of operation monitoring system) Fig. 1 is a diagram showing a schematic configuration of an operation monitoring system 1 according to this embodiment. As shown in Fig. 1, the operation monitoring system 1 according to this embodiment includes a plurality of devices (devices 2a to 2d), sound generating mechanisms 3a to 3d provided in the plurality of devices (devices 2a to 2d), a microphone 4 for collecting sounds generated from the sound generating mechanisms 3a to 3d in response to the driving of the plurality of devices (devices 2a to 2d), and an operation monitoring device 10 for monitoring the operating states of the plurality of devices (devices 2a to 2d) by analyzing the sounds collected via the microphone 4.

[0023] The plurality of devices (devices 2a to 2d) are, for example, rotating devices such as pumps installed within the pump facility.

[0024] The sound generating mechanisms 3a to 3d are provided in or near the drive units (not shown) of multiple devices (devices 2a to 2d), and generate sounds in response to the drive of the drive units. The sound generating mechanisms 3a to 3d also include a mechanism (intermittent sound generating mechanism) that intermittently generates sounds in response to the rotation cycle of the rotors of the drive units. Different frequencies are assigned to the sounds generated by the sound generating mechanisms 3a to 3d for each device. This allows the determining unit 13, described below, to reliably determine the operating state of each device. The configuration of the sound generating mechanisms 3a to 3d will be described in detail later.

[0025] The microphone 4 collects sounds generated by sound generating mechanisms 3a to 3d installed in the devices (devices 2a to 2d) in response to the operation of the devices. The microphone 4 is connected to the operation monitoring device 10, and the audio signals collected by the microphone 4 are input to the operation monitoring device 10.

[0026] The operation monitoring device 10 includes a sound collection unit 11, an analysis unit 12, a determination unit 13, an output unit 14, an operation state recording unit 15, and a display control unit 16.

[0027] The sound collection unit 11 collects, via the microphone 4, sounds generated from the sound generation mechanisms 3a to 3d provided in the plurality of devices (devices 2a to 2d).

[0028] The analysis unit 12 analyzes the sound (sound collection data) collected by the sound collection unit 11. For example, the analysis unit 12 performs a fast Fourier transform (FFT) on the sound collected by the sound collection unit 11. Instead of performing a fast Fourier transform, bandpass filters (four bandpass filters with center frequencies f1 to f4) corresponding to the frequencies of the sounds emitted by the sound generation mechanisms 3a to 3d (for example, frequencies f1 to f4) may be applied to the sound collected by the sound collection unit 11.

[0029] Furthermore, the analysis unit 12 calculates the rotation speed of the rotating body provided in the drive unit of the plurality of devices (devices 2a to 2d) by analyzing the intermittent sounds generated from the intermittent sound generating mechanisms included in the sound generating mechanisms 3a to 3d. Specifically, the analysis unit 12 calculates the rotation speed of the rotating body from the number of times the intermittent sound occurs per one rotation of the rotating body, which is set for each device, and the number of times the intermittent sound is detected in a predetermined period (for example, one minute). For example, if the number of times the intermittent sound occurs per one rotation of the rotating body is N and the number of times the intermittent sound is detected in one minute is M, the analysis unit 12 calculates the rotation speed of the rotating body as M / N [rpm].

[0030] The determination unit 13 determines the operating states of the multiple devices (devices 2a to 2d) based on the results of the analysis by the analysis unit 12. For example, when the sound pressure level of a frequency corresponding to a device to be monitored in the collected sound data that has been subjected to a fast Fourier transform by the analysis unit 12 exceeds a threshold, the determination unit 13 determines that the operating state of the device is "in operation," and when the sound pressure level is below the threshold, the determination unit 13 determines that the operating state of the device is "stopped."

[0031] In addition, when the analysis unit 12 applies a band-pass filter to the sound collection data instead of a fast Fourier transform, the judgment unit 13 judges that the operating state of the equipment to be monitored is "in operation" if the sound pressure level of the frequency corresponding to the equipment to be monitored in the sound collection data after applying the band-pass filter exceeds a threshold, and judges that the operating state of the equipment is "stopped" if the sound pressure level is below the threshold.

[0032] The output unit 14 outputs the results of the determination made by the determination unit 13 (the operating states of the devices 2a to 2d) and the rotation speed of the rotor of each device calculated by the analysis unit 12.

[0033] The operating state recording unit 15 records the determination results (operating / stopped) of the operating states of the devices 2a to 2d output from the output unit 14 in a database as the operating history of the devices 2a to 2d.

[0034] Furthermore, the operating state recording unit 15 records the rotation speed of the rotor of each device analyzed by the analysis unit 12 together with the determination result of the operating state of the devices 2a to 2d (operating / stopped) in the database as an operating history.

[0035] The display control unit 16 displays on the display unit the determination results of the operating states of the devices 2a to 2d (operating / stopped) and the rotation speed of the rotating body of each device output from the output unit 14. The display control unit 16 may read out the determination results of the operating states of the devices 2a to 2d (operating / stopped) and the rotation speed of the rotating body of each device from the operating history recorded in the database by the operating state recording unit 15, and display them on the display unit.

[0036] Although the example in which the sound collection unit 11 is provided in the operation monitoring device 10 has been described, the sound collection unit 11 does not necessarily have to be provided in the operation monitoring device 10. For example, as shown in FIG. 4 , a sound collection device 40 including the sound collection unit 11 may be installed at a location where the devices 2a to 2d to be monitored are installed (e.g., inside the pump facility), and an operation monitoring device 10 including each functional configuration other than the sound collection unit 11 (analysis unit 12, determination unit 13, output unit 14, operating state recording unit 15, and display control unit 16) may be installed at a location away from the location where the devices 2a to 2d are installed (e.g., outside the pump facility), and these may be connected via a network 5. In this case, the sound collection unit 11 of the sound collection device 40 collects sounds emitted by the sound generation mechanisms 3a to 3d of the devices 2a to 2d via a microphone 4, and the collected sound data is stored in a memory unit 41 of the sound collection device 40 and transmitted to the operation monitoring device 10 via the network 5 by a communication unit 42. The driving monitoring device 10 receives the collected sound data by the communication unit 17, and this collected sound data is input to the analysis unit 12. Note that the collected sound data collected by the sound collection device 40 does not necessarily have to be transmitted to the driving monitoring device 10 via the network 5. For example, the storage unit 41 of the sound collection device 40 may be configured as a removable storage medium (for example, an SD card, a USB memory, etc.), and the driving monitoring device 10 may read the collected sound data stored in this storage medium.

[0037] As such, the operation monitoring system 1 of this embodiment comprises a first sound generating mechanism provided in a first device that emits a first sound in response to driving of the drive unit of the first device, a second sound generating mechanism provided in a second device different from the first device that emits a second sound of a different frequency from the first sound in response to driving of the drive unit of the second device, a sound collection unit that collects sounds including the first sound and the second sound, an analysis unit that analyzes the sounds collected by the sound collection unit, a determination unit that determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit, and an output unit that outputs the results determined by the determination unit.

[0038] According to this configuration, the operating state of the equipment to be monitored can be determined by the sound generating mechanism provided in the equipment.

[0039] (Hardware configuration of operation monitoring device) Next, the hardware configuration of the operation monitoring device 10 will be described.

[0040] FIG. 2 is a block diagram showing an example of the hardware configuration of the operation monitoring device 10. As shown in FIG.

[0041] The CPU 101 is a processing device that controls the overall operation of the operation monitoring device 10. The ROM 102 is a non-volatile memory that stores control programs executed by the CPU 101 and various data. The RAM 103 is a volatile memory used as a load area and work area for programs executed by the CPU 101. The storage device 104 is a storage means for storing various information, and may be built into the main body of the operation monitoring device 10 or may have a removable storage medium. The input device 105 is a device through which a user of the operation monitoring device 10 inputs information, and may be, for example, a keyboard, mouse, touch panel, microphone, etc. The display 106 is a display device that displays various information (user interface, etc.). The microphone 107 is a device that collects sounds outside the operation monitoring device 10. The communication I / F (interface) 108 is an interface for connecting to a network. The bus 109 is a bus line that connects the above components to each other.

[0042] (Configuration of sound generating mechanism) Next, the configuration of the sound generating mechanism 3 (sound generating mechanisms 3a to 3d) of this embodiment will be described.

[0043] FIG. 5 is a diagram showing an example of the schematic configuration of sound generating mechanism 3 (sound generating mechanisms 3a to 3d). As shown in FIG. 5, sound generating mechanism 3 has a sound generating unit 31 provided on the outer periphery of a rotating body 21 of a drive unit of the monitored device. Rotating body 21 is connected to shaft 22 of the drive unit and rotates in conjunction with the rotation of the drive unit. When rotating body 21 rotates, sound generating unit 31 generates sound by utilizing the airflow generated by this rotation. Sound generating unit 31 is, for example, a whistle. The frequency of the sound generated by sound generating unit 31 can be changed by changing the length of sound generating unit 31 in the longitudinal direction (the direction in which the airflow passes).

[0044] Fig. 6 is a diagram showing another example of the schematic configuration of sound generating mechanism 3 (sound generating mechanisms 3a to 3d). As shown in Fig. 6, a plurality of coupling bolts 23 and a sound-making unit 31 configured integrally with the coupling bolts are provided on the side surface of rotating body 21. Then, as in the example shown in Fig. 5, when rotating body 21 rotates, sound-making unit 31 makes sound by utilizing the airflow generated by this rotation.

[0045] FIG. 7 is a diagram illustrating an example of a schematic configuration in which sound generating mechanism 3 (sound generating mechanisms 3a to 3d) includes an intermittent sound generating mechanism. As shown in FIG. 7, sound generating mechanism 3 includes intermittent sound generating mechanism 32 that generates sound intermittently in accordance with the rotation period of rotor 21 and sound generating unit 31 provided on the side of rotor 21. Intermittent sound generating mechanism 32 includes protrusions 321 provided on the outer periphery of rotor 21 and rod- or plate-shaped elastic member 322 extending from a fixed portion (not shown) of a device in which sound generating mechanism 3 is provided. When rotor 21 rotates, sound generating unit 31 generates sound by utilizing airflow generated by the rotation, and protrusions 321 provided on the outer periphery of rotor 21 come into contact with elastic member 322, thereby generating sound intermittently in accordance with the rotation period of rotor 21. The frequency of the intermittent sound generated by intermittent sound generating mechanism 32 can be changed by changing the length of elastic member 322 in the extending direction. Furthermore, by changing the number of protrusions 321 provided on the outer periphery of the rotor 21, the number of times the intermittent sound is generated per rotation of the rotor 21 can be changed.

[0046] FIG. 8 is a diagram showing another example of the schematic configuration when the sound generating mechanism 3 (sound generating mechanisms 3a to 3d) includes an intermittent sound generating mechanism. The intermittent sound generating mechanism 32 shown in FIG. 8 has a rod-shaped member 323 that abuts on the outer periphery of the rotor 21 and a recessed portion 324 formed on the outer periphery of the rotor 21. When the rotor 21 rotates, the blowing unit 31 generates sound by utilizing the airflow generated by the rotation, and the recessed portions 324 formed on the outer periphery of the rotor 21 come into contact with the rod-shaped member 323 and generate sound intermittently according to the rotation period of the rotor 21. The frequency of the intermittent sound generated by the intermittent sound generating mechanism 32 can be changed by changing the thickness (diameter) of the rod-shaped member 323. Furthermore, the number of intermittent sounds generated per rotation of the rotor 21 can be changed by changing the number of recessed portions 324 formed on the outer periphery of the rotor 21.

[0047] In this way, the sound generating mechanism 3 can change the frequency of the sound it generates, so by adjusting the sound (including intermittent sound) emitted by the sound generating mechanism 3 in advance to have an ultrasonic frequency, it is possible to prevent the sound generated by the sound generating mechanism 3 from becoming noise.

[0048] (Operation monitoring method) Next, the operation monitoring method according to this embodiment will be described.

[0049] Fig. 3 is a diagram showing a flowchart of the operation monitoring method executed by the operation monitoring system 1 according to this embodiment. As shown in Fig. 3, first, the sound collection unit 11 of the operation monitoring device 10 collects sounds including a first sound generated by a first sound generating mechanism (one of sound generating mechanisms 3a to 3d) provided in a first device (one of devices 2a to 2d) in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device (step S1).

[0050] Next, the analysis unit 12 of the operation monitoring device 10 analyzes the sound collected by the sound collection unit 11 (step S2).

[0051] Next, the determination unit 13 of the operation monitoring device 10 determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit 12 (step S3).

[0052] Then, the output unit 14 of the operation monitoring device 10 outputs the result of the determination made by the determination unit 13 (step S4).

[0053] Thus, the operation monitoring method of this embodiment includes the steps of analyzing sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound of a different frequency from the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device, determining the operating states of the first device and the second device based on the analysis results, and outputting the determination results.

[0054] According to this configuration, the operating state of the equipment to be monitored can be determined, displayed, and recorded by the sound generating mechanism provided in the equipment.

[0055] The present invention is not limited to the above-described embodiments, and the components can be modified and embodied in practice without departing from the spirit of the invention. Furthermore, various inventions can be created by appropriately combining multiple components disclosed in the above-described embodiments. For example, some components may be omitted from all the components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined.

[0056] In addition, any part or all of the functional units described in this specification may be realized by a program. The program mentioned in this specification may be distributed by being non-temporarily recorded on a computer-readable recording medium, or may be distributed via a communication line (including wireless communication) such as the Internet, or may be distributed in a state where it is installed on any terminal.

[0057] Based on the above description, a person skilled in the art may be able to conceive additional effects and various modifications of the present invention, but the aspects of the present invention are not limited to the individual embodiments described above. Various additions, modifications, and partial deletions are possible within the scope of the conceptual idea and spirit of the present invention, which is derived from the content defined in the claims and their equivalents.

[0058] For example, what is described herein as a single device (or component, the same applies hereinafter) (including what is depicted as a single device in the drawings) may be realized by multiple devices. Conversely, what is described herein as multiple devices (including what is depicted as multiple devices in the drawings) may be realized by a single device. Alternatively, some or all of the means and functions included in a certain device (e.g., a server) may be included in another device (e.g., a user terminal).

[0059] Furthermore, not all of the features described in this specification are essential requirements. In particular, features described in this specification but not included in the claims can be considered optional additional features.

[0060] It should be noted that the applicant is merely aware of the inventions disclosed in the documents listed in the "Prior Art Documents" section of this specification, and the present invention does not necessarily aim to solve the problems of the disclosed inventions. The problem that the present invention aims to solve should be determined by taking into consideration the entire specification. For example, if this specification states that a specific configuration achieves a certain effect, it can also be said that the present invention solves a problem that is the reverse of that effect. However, it is not necessarily intended that such a specific configuration be an essential requirement. [Explanation of symbols]

[0061] 1 Operation monitoring system 2a~2d equipment 21 Rotating body 22 Shaft 3, 3a-3d Sound generation mechanism 31 Fukiakibu 32 Intermittent sound generating mechanism 321 Convex 322 Elastic Members 323 Rod-shaped members 324 recess 4. Microphone 40 Sound collection device 10 Operation monitoring device 11 Sound collection section 12 Analysis Department 13 Judgment section 14 Output section 15. Operating condition recording section 16 Display control unit

Claims

1. An operation monitoring system that monitors the operation states of a plurality of devices, a first sound generating mechanism provided in the first device, which generates a first sound in response to driving of a driving unit of the first device; a second sound generating mechanism provided in a second device different from the first device, the second sound generating mechanism emitting a second sound having a frequency different from the first sound in response to driving of a drive unit of the second device; a sound collection unit that collects sounds including the first sound and the second sound; an analysis unit that analyzes the sound collected by the sound collection unit; a determination unit that determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit; an output unit that outputs the result determined by the determination unit; An operation monitoring system comprising:

2. the first device and the second device are rotating devices, the first sound generating mechanism and the second sound generating mechanism are provided on a rotating body that rotates in conjunction with the rotational drive of the drive unit, and include a first blowing unit and a second blowing unit that blow sound by utilizing an airflow generated by the rotation of the rotating body, The first blowing unit and the second blowing unit emit the first sound and the second sound, respectively. The driving monitoring system according to claim 1 .

3. the first sound generating mechanism includes a first intermittent sound generating mechanism that intermittently generates a third sound in accordance with a rotation period of a rotating body, the second sound generating mechanism includes a second intermittent sound generating mechanism that intermittently generates a fourth sound having a frequency different from the third sound in accordance with the rotation period of the rotating body. The driving monitoring system according to claim 2 .

4. The sounds collected by the sound collection unit further include the third sound and the fourth sound, the analysis unit calculates the rotation speed of the rotating body of the first device by analyzing the third sound, and calculates the rotation speed of the rotating body of the second device by analyzing the fourth sound. The operation monitoring system according to claim 3 .

5. The analysis unit performs a fast Fourier transform on the sound collected by the sound collection unit, the determination unit determines that the operating state of the first device is in operation when a sound pressure level of a frequency corresponding to the first sound exceeds a threshold in the sound collection data after the fast Fourier transform, and determines that the operating state of the second device is in operation when a sound pressure level of a frequency corresponding to the second sound exceeds a threshold; The driving monitoring system according to claim 1 .

6. the analysis unit applies a first band-pass filter corresponding to a frequency of the first sound and a second band-pass filter corresponding to a frequency of the second sound to the sound collected by the sound collection unit; The determination unit determines that the operating state of the first device is in operation when a sound pressure level of the sound collection data after application of the first band pass filter exceeds a threshold, and determines that the operating state of the second device is in operation when a sound pressure level of the sound collection data after application of the second band pass filter exceeds a threshold. The driving monitoring system according to claim 1 .

7. the sounds generated by the first sound generating mechanism and the second sound generating mechanism are ultrasonic waves. The operation monitoring system according to any one of claims 1 to 6.

8. The driving monitoring system according to claim 1 , further comprising a driving condition recording unit that records the result of the determination output by the output unit as a driving history.

9. The driving monitoring system according to claim 1 , further comprising a display control unit that displays the result of the determination output by the output unit.

10. An operation monitoring device that monitors the operation states of multiple devices, an analysis unit that analyzes sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound, generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; a determination unit that determines the operating states of the first device and the second device based on the results of the analysis by the analysis unit; an output unit that outputs the result determined by the determination unit; An operation monitoring device comprising:

11. 1. A computer-implemented method for monitoring the operational status of a plurality of pieces of equipment, comprising: a step of analyzing sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; determining the operating states of the first device and the second device based on the results of the analysis; outputting the result of the determination; A method comprising:

12. A program for causing a computer to execute a method for monitoring the operating states of a plurality of devices, the method comprising: a step of analyzing sounds including a first sound generated by a first sound generating mechanism provided in a first device in response to driving of a drive unit of the first device, and a second sound having a frequency different from that of the first sound generated by a second sound generating mechanism provided in a second device different from the first device in response to driving of a drive unit of the second device; determining the operating states of the first device and the second device based on the results of the analysis; outputting the result of the determination; A program having:

13. A computer-readable storage medium storing the program according to claim 12.

Images