JP2010169430A - Diagnostic method of electronic device and mechanism components in electronic device, and diagnostic program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent decrease in the analysis accuracy due to the effects of non-specific factors, such as, environmental sound entering a chassis, in the diagnosis of mechanism components in a closed space and when positioning the mechanism components. <P>SOLUTION: A second sonic sensor (microphone 5) for generating a second sonic signal from the environmental sound outside of the chassis is provided, and a plurality of calculation means (calculation device 7) are disposed in accordance with a predetermined position relation. The diagnosis of the mechanism components and the positioning of the mechanism components is performed, by generating a third sonic signal by removing a second sonic signal entering into the chassis from a first sonic signal obtained from a first sonic sensors (microphones 1-4) for generating a first sonic signal from the action sound of the rotating mechanism components mounted inside the chassis and by performing an frequency analysis of the third sonic signal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a diagnosis method for a mechanical component in a slave device and an electronic device, and a diagnostic program, and in particular, collects operation sounds of a mechanical component mainly generated in rotation inside a housing with a plurality of acoustic sensors. The present invention also relates to a technique for diagnosing signs of abnormality or failure by frequency analysis and specifying the position coordinates of a corresponding mechanical component that is a sound source.

  In general, operating sounds emitted from mechanical parts mounted inside an electronic device casing are collected by a plurality of microphones, and frequency components are obtained by frequency analysis to detect abnormalities in climatic parts and signs of failure. A method for specifying the position coordinates of the corresponding mechanical component is known.

  However, according to this method, mechanical components such as a cooling fan and a hard disk drive mounted in a narrow and sealed space such as in a server casing are reflected in the casing or environmental sound entering the casing from outside the casing. As a result, a complex acoustic space is formed due to the influence of the above, and therefore, sufficient analysis accuracy cannot be expected to perform frequency analysis, which may lead to detection of abnormalities in mechanical parts and erroneous detection when specifying sound source coordinates. there were.

  For this reason, as disclosed in Patent Document 1, in the noise influence evaluation on the site boundary in a plant or a general factory, the influence from a plurality of sound sources in the site on the site boundary and other traffic noises, etc. In order to analyze and evaluate the influence of noise at the same time, a background noise sensor is provided in addition to the sound source search sensor, and the contribution analysis device calculates how much the noise from each noise source contributes to the noise at the evaluation point Has been proposed.

JP 2002-54986 A

  However, according to the technique disclosed in Patent Document 1, the sound source search sensor is installed in the vicinity of each sound source serving as a noise generation source. Therefore, an accurate contribution rate cannot be obtained depending on the positional relationship. Application to a closed space in a server housing where a complicated acoustic space is formed is difficult due to detection accuracy problems.

  The reason is that electronic devices such as servers are mounted with a large number of functional parts with motor rotation, such as cooling fans and hard disk drives, which are used as sound sources. For this reason, the influence of the reflected sound generated in the housing and the environmental sound from the outside cannot be ignored.

(Object of invention)
The object of the present invention is due to the influence of unspecified factors such as reflected sound generated inside the case and environmental sound entering the case when diagnosing the mechanical part in a closed space and specifying the position of the relevant mechanical part. An object of the present invention is to provide an electronic device, a diagnostic method for a mechanical component in the electronic device, and a diagnostic program that prevent degradation in analysis accuracy.

  A first electronic device according to the present invention includes a first acoustic sensor that is arranged in accordance with a predetermined positional relationship, and that generates a first acoustic signal from an operation sound of a mechanical component accompanied by rotation mounted in a housing. A second acoustic sensor that generates a second acoustic signal from environmental sound outside the housing; and a second acoustic sensor that enters the housing from the first acoustic signal acquired from the first acoustic sensor. Computing means for removing the acoustic signal to generate a third acoustic signal and analyzing the third acoustic signal to diagnose the mechanical component and specify the position of the mechanical component.

  According to the second electronic device diagnosis method of the present invention, a plurality of mechanical component diagnosis methods are arranged in accordance with a predetermined positional relationship, and a first acoustic signal is generated from an operation sound of the mechanical component with rotation mounted inside the housing. An electronic device diagnosis method comprising: a first acoustic sensor; a second acoustic sensor that generates a second acoustic signal from environmental sound outside the housing; and a computing unit. A first step of generating a third acoustic signal by removing a second acoustic signal that enters the housing from a first acoustic signal acquired from the first acoustic sensor, and the computing means Includes a second step of analyzing the third acoustic signal and diagnosing the mechanical part and specifying the position of the relevant mechanical part.

  The third diagnostic program of the present invention is executed on a computer, and a plurality of the diagnostic programs are arranged according to a predetermined positional relationship, and generates a first acoustic signal from an operation sound of a mechanical component with rotation mounted inside the housing. A diagnostic program for use in an electronic device comprising: a first acoustic sensor; a second acoustic sensor that generates a second acoustic signal from environmental sound outside the housing; and an arithmetic means. A first computing process for generating a third acoustic signal by removing a second acoustic signal that enters the inside of the housing from a first acoustic signal acquired from the first acoustic sensor; Analyzing the third acoustic signal and executing the second arithmetic processing for diagnosing the mechanical part and specifying the position of the mechanical part.

  According to the present invention, when diagnosing a mechanical part in a closed space and specifying the position of the corresponding mechanical part, analysis is performed by the influence of unspecified factors such as reflected sound generated inside the casing and environmental sound entering the casing. It is possible to provide an electronic device, a diagnostic method for a mechanical component in the electronic device, and a diagnostic program that prevent a decrease in accuracy.

It is a block diagram which shows the structure of the electronic device by embodiment of this invention. It is a figure which shows an example of arrangement | positioning of the microphone used with the electronic device by embodiment of this invention. It is a flowchart which shows operation | movement of the electronic device by the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic device by the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic device by the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the electronic device by the 3rd Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Configuration of the first embodiment)
FIG. 1 is a block diagram showing the configuration of an electronic device according to the first embodiment of the present invention. Here, a server 100 is exemplified as the electronic device.

  Referring to FIG. 1, a server 100 according to a first embodiment of the present invention includes microphones 1 to 5, an A / D (Analog / Digital) converter 6, an arithmetic device 7 as arithmetic means, and a cooling control circuit. Unit 8, cooling fans 9 to 11, temperature sensor 12, server main body 13, hard disk drive (HDD 14), network interface I / F (interface) 15, and speaker 16 in the housing. . All of these are mounted in the server 100 casing.

  Each of the microphones 1 to 4 serves as a first acoustic sensor that generates a first acoustic signal from operation sounds of mechanical components (cooling fans 9 to 11 and the HDD 14) with rotation mounted inside the server 100 housing. Function.

  A plurality of the microphones 1 to 4 described above are arranged in the housing in accordance with a predetermined positional relationship. For example, as shown in FIG. A total of four are arranged and attached at three equidistant positions along the three-dimensional coordinate axes (x, y, z).

  On the other hand, the microphone 5 collects environmental sound and the like generated outside the housing, and thus functions as a second acoustic sensor that generates a second acoustic signal from the environmental sound outside the server 100 housing.

  The A / D converter 6 converts an analog signal that is an acoustic signal received by each of the microphones 1 to 5 into digital data and supplies the digital data to the arithmetic device 7.

  The computing device 7 removes environmental sound components that enter the housing based on the acoustic data of the microphones 1 to 5 converted into digital signals output via the A / D converter 6, and performs diagnosis and sound source by frequency analysis. An operation for specifying the position (coordinates) is performed. That is, the computing device 7 generates the third acoustic signal by removing the second acoustic signal that enters the inside of the housing from the first acoustic signal acquired from the first acoustic sensor, and generates the third acoustic signal. It functions as a calculation means for performing a circumferential analysis to determine a mechanical part and specify a position of the corresponding mechanical part.

  The cooling control circuit unit 8 is installed in the server 100 casing, and monitoring and control of the number of revolutions of the cooling fans 9 to 11 mounted in the server 100 casing under the control of the server main body 13 to be described later. The temperature sensor 12 monitors the temperature inside the housing, and has a function of exchanging data with a server main unit 13 described later.

  The cooling fans 9 to 11 are mounted inside the server 100 casing, and connected to the cooling control circuit unit 8 to monitor the rotational speed and control the rotational speed. In addition, the temperature sensor 12 measures the temperature in the server 100 casing and notifies the server main body 13 of data related to the temperature via the cooling control circuit unit 8.

  The arithmetic device 7 and the cooling control circuit unit 8 described above are connected to the server body unit 13 via the extended input / output bus 17 including a plurality of lines for address, data, and control.

  The server main body 13 is a functional block that executes an original function of the server. Internally, the server main body 13 performs a CPU serving as a control center, a memory for storing programs and data executed by the CPU, and reading / writing of the memory. The memory controller and the input / output device are connected to the HDD 14 and the network I / F 15 and an input / output controller that exchanges data with the CPU. These CPU, memory, memory controller, and input / output controller are not shown. The server main unit 13 is connected to the arithmetic device 7 and the cooling control circuit unit 8 via the above-described extended input / output bus 17, and controls the arithmetic device 7 and the cooling control circuit unit 8 via the extended input / output bus 17. To enable data exchange.

  The hard disk loaded in the HDD 14 stores a server OS (Operating System), application programs, and other various data, and is connected to the server main unit 13 as an input / output device. The network I / F 14 is a communication controller that communicates with an external server or a terminal connected to the server body 13 via a network.

  The in-casing speaker 16 is a sound source installed inside the casing of the server 100 and emits a reference sound when correcting the reception characteristics and the like of the microphones 1 to 4 described above. Details will be described later.

(Operation of the first embodiment)
Next, the operation of the electronic apparatus (server 100) according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

  Referring to FIG. 3, first, the microphones 1 to 4 collect the operation sounds generated from the mechanical components that are generated inside the server 100 housing and are rotated by the motors including the cooling fans 9 to 11 and the HDD 14. An acoustic signal is generated and output to the A / D converter 6 (step S301). Further, the microphone 5 collects environmental sounds generated outside the housing of the server 100 to generate an acoustic signal and outputs it to the A / D converter 6 (step S302).

  The A / D converter 6 that receives the respective acoustic signals from the microphones 1 to 5 in an analog format converts them into digital signals and outputs them to the computing device 7 as operation sound signals or environmental sound signals, respectively.

  The arithmetic device 7 performs frequency analysis based on the operation sound signals of the microphones 1 to 4 converted into digital signals, and the sound source decomposed into frequency signal components by calculation based on the arrival time difference of the sound to the microphones 1 to 4. The position coordinates are specified (step S303). Here, as an alternative to the arrival time difference, the position coordinates of the sound source may be specified by a calculation based on a phase difference or spectrum. Since the method for specifying the position coordinates of the sound source is realized by a well-known method, a description thereof is omitted here.

  The arithmetic device 7 also collects an operation sound signal output from the A / D converter 6 and collected by the microphones 1 to 4 and converted into a digital signal, and a sound collected by the microphone 5 output from the A / D converter 6. The frequency analysis of the environmental sound signal converted into the digital signal is performed. Here, the frequency component of the operation sound signal subjected to the frequency analysis matches the frequency component of the environmental sound signal entering the server 100 housing. The frequency component to be removed is removed to generate a diagnostic signal (step S304). The removal of the frequency component of the environmental sound signal described above can be easily realized by a noise cancellation technique using a digital filter.

  Subsequently, the computing device 7 communicates with the server main body 13 via the extended input / output bus 17, and acquires sample data of operation sounds during normal operation of the mechanical components from the HDD 14 via the server main body 13 (step S305). ) And a new diagnostic acoustic signal, which is analysis data obtained by removing the environmental sound component described above, is compared (step S306). As a result of the comparison calculation, if it is approximately equal and within the allowable range (step S306 “=”), the calculation device 7 determines that it is normal (step S307), and if the difference exceeds the allowable range (step S306 “ ≠ ”), it is determined that there is a sign of abnormality or failure in the mechanical component, and abnormality determination output is performed (step S308). The abnormality determination output is notified to the outside by a display device (not shown) included in the server 100 or the speaker 16 in the housing.

(Effects of the first embodiment)
In the electronic apparatus (server 100) according to the present embodiment, the calculation means (calculation device 7) is a case from the first acoustic signal (operation sound signal) acquired from the first acoustic sensor (microphones 1 to 4). The second acoustic signal (environmental sound signal) that enters inside is removed to generate a third acoustic signal (diagnostic signal), and the third acoustic signal is analyzed to diagnose the mechanical component and the position of the corresponding mechanical component. Since the identification is performed, for example, it is possible to prevent a decrease in analysis accuracy due to the influence of unspecified factors such as an environmental sound entering the housing in a closed space such as the inside of the server 100 housing.

  The reason for this is that, for example, as shown in FIG. 2, one at an arbitrary origin position in the space coordinates inside the server 100 casing, Three acoustic sensors (microphones 1 to 4) are installed at three equidistant positions along the three-dimensional coordinate axis from the origin position to collect the operation sound of the mechanical components in the housing and generate the first acoustic signal. In addition, an acoustic sensor (microphone 5) that collects environmental sounds outside the server 100 casing and generates a second acoustic signal is installed, and the arithmetic processing means (arithmetic device 7) enters the server 100 casing. This is because the third acoustic signal is generated by removing the frequency component of the first acoustic signal whose tendency coincides with the frequency component of the second acoustic signal, and this is used for diagnosis. As a result, it is possible to improve the analysis accuracy of the operation sound of the mechanical parts generated inside the server 100 casing.

  In the present embodiment, the determination of signs of abnormality or failure of the mechanical parts accompanying motor rotation is compared with data sampled in advance when there is no abnormality or failure sign. In this example, the sample data is stored in the hard disk loaded in the HDD 14 and the arithmetic device 7 acquires from the server body 13 at the time of diagnosis execution, and performs the comparison operation. The server main body 13 may substitute the execution. Further, a server externally connected via the network I / F 15 may be executed remotely.

(Operation of Second Embodiment)
Next, the operation of the electronic apparatus according to the second embodiment of the present invention will be described with reference to the flowcharts of FIGS. In the second embodiment described below, the configuration of the electronic device shown in FIG. 1 is used as in the first embodiment, and the setting arrangement of the microphones 1 to 4 shown in FIG. 2 is used. And

  Referring to FIG. 4, for example, when the cooling fan 9 is a diagnosis target and the operation sound analysis is performed, the following situation is set. That is, the rotation operation of the motors of the cooling fans 10 and 11 is temporarily stopped from the server main body 13 via the cooling control circuit 8 as long as the operation of the server 100 is not affected. The motor rotation is temporarily stopped (step S401).

  Then, only the operation sound of the cooling fan 9 to be diagnosed is collected by the microphones 1 to 4 (step S402), the arithmetic device 7 performs diagnosis by frequency analysis as in the first embodiment, and the sound source Is specified (step S403).

  Specifically, in step S403, the computing device 7 removes a frequency component whose tendency matches with the frequency component of the environmental sound signal entering the inside of the server 100 casing from the frequency component of the operation sound signal subjected to frequency analysis. Generate a diagnostic signal. Then, the arithmetic device 7 acquires sample data of operation sound during normal operation of the cooling fan 9 from the HDD 14 via the server main body 13 and removes the sample data and the above-described environmental sound component. Diagnosis is performed by comparison with the diagnostic signal. The arithmetic device 7 performs frequency analysis based on the operation sound signals of the microphones 1 to 4 converted into digital signals, and is decomposed into frequency signal components by calculation based on the arrival time difference of the sounds to the microphones 1 to 4. The position coordinates of the selected sound source are specified.

  On the other hand, if it is determined that the cooling fan 9 is abnormal as a result of the diagnosis described above, referring to FIG. 5, the server body 13 stops the rotation operation of the corresponding cooling fan 9 via the cooling control circuit unit 8. (Step S501). Then, the computing device 7 performs frequency analysis from the operation sound signal collected again by the microphones 1 to 4 and converted into a digital signal by the A / D converter 6 (step S502), and the abnormal sound disappears. Confirmation is made (step S503 “Yes”). Here, when it cannot be confirmed that the abnormal sound disappears (step S503 “No”), the previous diagnosis is an erroneous diagnosis (step S506). The computing device 7 also refers to the monitoring result of the cooling fan rotation speed by the cooling control circuit unit 8 and the monitoring result by the temperature sensor 12 (step S504), and if both are within the normal range (step S504 “Yes”). “)”, A normal confirmation determination is made (step S505), and if it is not within the normal range (“No” in step S504), erroneous detection can be prevented by determining that the diagnosis is incorrect (step S506).

(Effects of the second embodiment)
In the electronic apparatus according to the present embodiment, the calculation means (the calculation device 7) performs the rotation operation of the other mechanical components excluding the mechanical component (cooling fan 9) to be diagnosed mounted in the server 100 casing. The server is operated as long as there is no influence on the system, and the third acoustic signal (diagnostic signal) is frequency-analyzed to diagnose the mechanical part to be diagnosed. It is possible to create a sound environment in the 100 housing, and thereby, it is possible to improve the analysis accuracy of the operation sound and position specification of the diagnosis target mechanical component without being affected by the operation sound of other mechanical components.

  Further, as a result of the diagnosis, the rotation operation of the mechanical component determined to be abnormal is stopped, and the third acoustic signal (diagnostic signal) acquired is subjected to frequency analysis and diagnosed again to be determined as abnormal. By creating a sound environment in the server 100 housing in which the rotation of the mechanical parts stopped, and confirming that the occurrence of abnormal noise has disappeared, it is possible to prevent false detections. By linking with the monitoring result by 12, the reliability of the analysis result increases.

(Operation of the third embodiment)
Next, the operation of the electronic apparatus according to the third embodiment of the present invention will be described with reference to the flowchart of FIG. In the third embodiment described below, the configuration of the electronic device (server 100) shown in FIG. 1 is used as in the first and second embodiments, and the microphones 1 to 4 shown in FIG. It is assumed that the setting arrangement of is used.

  Referring to FIG. 6, the server body 13 first drives the in-casing speaker 16 (step S601), whereby the in-casing speaker 16 emits a reference sound signal having an arbitrary frequency component.

  Subsequently, each of the microphones 1 to 4 having the setting arrangement shown in FIG. 2 collects the operation sound generated by the mechanical parts inside the server 100 casing together with the reflected sound in the closed space with respect to the reference sound described above (step S602). ), An acoustic signal converted into a digital signal by the A / D converter 6 is output to the arithmetic device 7.

  The arithmetic device 7 performs frequency analysis of the acoustic signal generated by each of the microphones 1 to 4 acquired via the A / D converter 6 (step S603), and the frequency component generated as a result and the frequency component of the reference sound (Step S604), and a correction process is performed to cancel the reflected sound component generated in the housing of the server 100 from the frequency components acquired by the microphones 1 to 4 (step S605). Note that in the process of step S605, the arithmetic device 7 may correct the reception characteristics of the microphones 1 to 4 instead of removing the reflected sound component by a noise canceller, for example.

(Effects of the third embodiment)
In the electronic apparatus according to the present embodiment, the calculation means (calculation device 7) is obtained from the reflected sound in the closed space by the sound source (speaker 16 in the casing) and the first acoustic sensor (microphones 1 to 4). Compared with the first acoustic signal, the reflected sound component may be removed, and the reception characteristics of the first acoustic sensor may be corrected, so that an abnormality or minor failure of the mechanical component to be diagnosed mounted in the housing can be obtained. It is possible to improve the detection accuracy of the weather or position.

  Note that the functions of the calculation means (the calculation device 7 or the server main body 13) shown in FIG. 1 may be realized entirely by software, or at least a part thereof may be realized by hardware. For example, the computing unit generates a third acoustic signal by removing the second acoustic signal that enters the housing from the first acoustic signal acquired from the first acoustic sensor, and generates the third acoustic signal. The data processing for analyzing the mechanism part and diagnosing the mechanical part and specifying the position of the relevant mechanical part may be realized on a computer by one or a plurality of programs, or at least a part thereof may be realized by hardware. Good.

  In addition, the acoustic signals collected by the microphones 1 to 5 can be stored (recorded) in the hard disk of the HDD 14 to construct an operation sound database regarding abnormalities in mechanical parts and failure symptoms. It can be used as a material for abnormality and failure symptom analysis.

  It is also possible to transfer the operation sound of the mechanical parts collected by each microphone 1-5 to a remote server connected externally via the network I / F 15 and perform analysis for diagnosis at a remote location. It is. The computing means in this case corresponds to a remote server externally connected via the network I / F 15.

  Further, when the maintenance work of the server 100 is performed, it is possible to make a voice call with a remote maintenance base in real time by using the microphone 5 that collects sound outside the housing and the speaker 16 in the housing. This improves the efficiency and quality of maintenance work. In addition, by collecting sounds generated outside the housing by the speaker 5, it is possible to obtain a security effect of detecting the sound of an intruder into the room where the server 100 is installed.

  Further, according to the present embodiment, the description has been made only for the case where the mechanical component accompanied by the motor rotation is mounted. However, the present invention is not limited to this. For example, the mechanical component necessary for mounting the HDD 14 to the server 100 housing For example, a component that does not generate normal operation sound, specifically, a component that emits vibration noise from loosening of mounting screws or the like due to vibration generated in the server 100, etc. can be obtained by observing this with the microphones 1 to 4. The effect that the abnormality of the components that have been difficult to detect can also be detected is obtained.

  Moreover, according to this Embodiment, although only the server 100 was illustrated as an electronic device, it is applicable not only to the server 100 but the electronic device generally mounted with the mechanism component mentioned above.

  Although the present invention has been described with reference to the preferred embodiments and examples, the present invention is not necessarily limited to the above-described embodiments and examples, and various modifications can be made within the scope of the technical idea. Can be implemented.

1-4: Microphone (first acoustic sensor)
5: Microphone (second acoustic sensor)
6: A / D converter 7: Arithmetic device (calculation means)
8: Cooling control circuit unit 9-11: Cooling fan 12: Temperature sensor 13: Server body unit 14: Hard disk drive (HDD)
15: Network I / F
16: Speaker in housing 17: Expansion input / output bus 100: Server

Claims (22)

A plurality of first acoustic sensors arranged in accordance with a predetermined positional relationship and generating a first acoustic signal from an operation sound of a mechanical component with rotation mounted in the housing;
A second acoustic sensor that generates a second acoustic signal from environmental sound outside the housing;
Removing the second acoustic signal entering the inside of the housing from the first acoustic signal acquired from the first acoustic sensor to generate a third acoustic signal, and analyzing the third acoustic signal; Arithmetic means for diagnosing the mechanical part and specifying the position of the mechanical part;
An electronic device characterized by comprising: The first acoustic sensor is
4. A total of four are arranged and attached, one at an arbitrary origin position in space coordinates inside the housing and three at an equidistant position along a three-dimensional coordinate axis from the origin position. 1. The electronic device according to 1. The computing means is
3. The electronic apparatus according to claim 1, wherein a predetermined calculation is performed from a difference in arrival time of each operation sound to the first acoustic sensor, and a position coordinate of the sound source decomposed into frequency components is specified. . The computing means is
The frequency analysis of the first acoustic signal and the second acoustic signal is performed, and the frequency component of the first acoustic signal whose tendency coincides with the frequency component of the second acoustic signal that has entered the housing is removed. The electronic apparatus according to claim 1, wherein a third acoustic signal is generated. A storage device in which a frequency sample of operation sound during normal operation of the mechanical component is stored;
The computing means is
5. The diagnosis of the mechanical component is performed by comparing a frequency component of the third acoustic signal with a frequency sample read from the storage device. 6. Electronic equipment. The computing means is
The rotation operation of the other mechanical components excluding the mechanical component to be diagnosed mounted in the housing is stopped as long as the system operation is not affected, and the frequency of the third acoustic signal is analyzed to determine the diagnosis target. The electronic device according to any one of claims 1 to 5, wherein a diagnosis of a mechanical component is performed. The computing means is
The rotation of the mechanical component determined as abnormal as a result of the diagnosis is stopped, and the confirmation of the disappearance of abnormal sound is performed by analyzing the acquired third acoustic signal. Electronic equipment. A sound source that emits a sound of an arbitrary frequency component serving as a reference in the housing,
The computing means is
The reflected sound inside the housing by the sound source is compared with the first acoustic signal acquired from the first acoustic sensor, and the reflected sound component generated in the housing is removed, or the first sound is The electronic apparatus according to claim 1, wherein the reception characteristic of the sensor is corrected. A first acoustic sensor that generates a first acoustic signal from an operation sound of a mechanical component that is arranged in accordance with a predetermined positional relationship and that is mounted inside the housing and that rotates, and an environmental sound outside the housing A diagnostic method for a mechanical component in an electronic device comprising a second acoustic sensor that generates a second acoustic signal and an arithmetic means,
A first step in which the computing means generates a third acoustic signal by removing a second acoustic signal that enters the housing from a first acoustic signal acquired from the first acoustic sensor;
A second step in which the computing means analyzes the third acoustic signal to diagnose the mechanical component and specify the position of the mechanical component;
A method for diagnosing a mechanical component in an electronic device in the electronic device. The first step includes
The frequency analysis of the first acoustic signal and the second acoustic signal is performed, the frequency component of the first acoustic signal whose tendency matches with the frequency component of the second acoustic signal entering the housing is removed, and the first acoustic signal is removed. A sub-step of generating three acoustic signals;
The method for diagnosing a mechanical component in an electronic device according to claim 9, comprising: The second step includes
A total of four first acoustic sensors arranged and attached, one at an arbitrary origin position in spatial coordinates inside the housing and three at an equidistant position along the three-dimensional coordinate axis from the origin position A sub-step of performing a predetermined calculation from the difference in arrival time of each operation sound and identifying the position coordinates of the sound source decomposed into frequency components,
The method for diagnosing a mechanical component in an electronic device according to claim 9, comprising: The second step includes
10. The diagnosis of the mechanical component is performed by comparing a frequency component of the third acoustic signal with a frequency sample of operation sound during normal operation of the mechanical component read from a storage device. The diagnostic method of the mechanism components in the electronic device of any one of Claim 11. The second step is:
The rotation operation of other mechanical components except the mechanical component to be diagnosed mounted inside the casing is stopped as long as the system operation is not affected, and the third acoustic signal is subjected to frequency analysis to obtain the diagnosis target. A sub-step for determining an abnormality of a mechanical part,
The method for diagnosing a mechanical component in an electronic device according to any one of claims 9 to 12, characterized by comprising: The second step includes
A sub-step of stopping the rotational operation of the mechanical component determined to be abnormal as a result of the diagnosis, and performing a frequency determination on the acquired third acoustic signal to confirm the disappearance of abnormal sound,
The method for diagnosing a mechanical component in an electronic device according to claim 13, comprising: A reflected sound generated in the casing by comparing a reflected sound from a sound source that emits a sound of an arbitrary frequency component provided in the casing with a first acoustic signal acquired from the first acoustic sensor. A third step of removing a component or correcting a reception characteristic of the first acoustic sensor;
The method of diagnosing a mechanical component in an electronic device according to claim 9. A first acoustic sensor that is executed on a computer and is arranged in accordance with a predetermined positional relationship, and generates a first acoustic signal from an operation sound of a mechanical component with rotation mounted inside the housing, and the housing A diagnostic program for use in an electronic device comprising a second acoustic sensor for generating a second acoustic signal from an external environmental sound, and a computing means,
In the computer,
A first calculation process for generating a third acoustic signal by removing a second acoustic signal that enters the inside of the housing from a first acoustic signal acquired from the first acoustic sensor;
A second arithmetic processing for analyzing the third acoustic signal and diagnosing the mechanical component and specifying the position of the mechanical component;
A diagnostic program characterized in that The first calculation process includes:
The frequency analysis of the first acoustic signal and the second acoustic signal is performed, the frequency component of the first acoustic signal whose tendency matches with the frequency component of the second acoustic signal entering the housing is removed, and the first acoustic signal is removed. 3 acoustic signals are generated,
The diagnostic program according to claim 16. The second calculation process is:
A total of four first acoustic sensors arranged and attached, one at an arbitrary origin position in spatial coordinates inside the housing and three at an equidistant position along the three-dimensional coordinate axis from the origin position Perform a predetermined calculation from the difference in arrival time of the nuclear motion sound to identify the position coordinates of the sound source decomposed into frequency components,
The diagnostic program according to claim 16. The second calculation process is:
The frequency component of the third acoustic signal is compared with the frequency sample of the operation sound during normal operation of the mechanism component read from the storage device to diagnose the mechanism component. The diagnostic program according to claim 18. The second calculation process is:
The rotation operation of other mechanical components except the mechanical component to be diagnosed mounted inside the casing is stopped as long as the system operation is not affected, and the third acoustic signal is subjected to frequency analysis to obtain the diagnosis target. To determine the abnormality of the mechanical parts
The diagnostic program according to any one of claims 16 to 19, characterized in that: The second calculation process is:
As a result of the diagnosis, the rotation of the mechanical component determined to be abnormal is stopped, and the acquired third acoustic signal is subjected to frequency analysis to determine whether or not abnormal sound disappears.
The diagnostic program according to claim 20, wherein: In the computer,
A reflected sound generated in the casing by comparing a reflected sound from a sound source that emits a sound of an arbitrary frequency component provided in the casing with a first acoustic signal acquired from the first acoustic sensor. A third calculation process for removing a component or correcting a reception characteristic of the first acoustic sensor;
The diagnostic program according to claim 16, wherein the diagnostic program is executed.

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