JP2011205566A - Audio device, information processing method, program for audio device, and information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an audio device in which causes of failure is easily analyzed in a short time period.SOLUTION: The audio device S to be connected to a speaker means 2 includes: an amplifier means 1 for amplifying an input signal Sin to generate a drive signal Sd for driving the speaker means 2; an abnormal state detecting means 3 for detecting an abnormal state of the amplifier means 1; a signal specs detecting means 4 for detecting the input level and a frequency of the input signal Sin in timing at which the abnormal state is detected; a storage means 5; and a storage control means 6 for causing the storage means 5 to store specs information including input level information indicating the input level detected, frequency information indicating the detected frequency and timing information indicating the corresponding timing.

Description

  The present application belongs to the technical field of an audio apparatus, an information processing method, an audio apparatus program, and an information recording medium. More specifically, the present invention belongs to the technical field of an audio apparatus and information processing method for collecting information for failure analysis, a program for the audio apparatus, and an information recording medium on which the program is recorded.

  In general, various protection functions are added to an audio device connected to a speaker, and the function of the audio device itself is protected even if the operating environment changes variously. For example, Patent Document 1 below is given as a prior art document regarding general protection of such an audio device. The technique disclosed in Patent Document 1 includes an overcurrent detection unit that detects an overcurrent generated in the amplifier unit, and forcibly detects the overcurrent detection unit when the output voltage from the amplifier unit is a certain level or higher. The function is turned off. In the technology disclosed in Patent Document 1, this configuration prevents erroneous detection of an overcurrent caused by a short circuit.

  On the other hand, even if the protection function as described above is provided, the audio device may fail. When such a failure occurs, the repair is performed. However, in the repair, it is essential to analyze the event that caused the failure and the cause of the cause event. Usually, the analysis of the causal event is performed after the occurrence of the failure. Conventionally, in order to facilitate this subsequent verification, log data indicating the content of the operation and the like is automatically and continuously recorded from the stage where the audio device is operating normally. Yes. For example, in the prior art described in Patent Document 2 below, the voltage of the input signal to the amplification unit, the voltage of the output signal from the amplification unit, the gain of the amplification unit, the ambient temperature, and the power supply voltage of the amplification unit are set as the current time. The recording is automatically and continuously recorded in association with the real-time clock shown. And about the voltage of the input signal after recording, etc., the reason for the abnormal state that is the cause event of the failure by determining whether it is an abnormal value in the order of the voltage of the input signal → the voltage of the output signal → the gain ... It is configured to be able to determine whether it is an internal factor or an external factor of the audio device.

JP 2007-074119 A JP 2004-128807 A

  However, in the prior art described in Patent Document 2, only the voltages of the input signal and the output signal, the ambient temperature, and the power supply voltage are recorded in the memory. Therefore, the causal event based on the change in the frequency of the input signal cannot be analyzed afterwards, or it takes a lot of time and effort even if the analysis can be performed.

  That is, in the case of an audio device, the output end is finally connected to a speaker. Here, the input impedance of the speaker generally varies depending on the frequency of the driving signal of the speaker. Therefore, the operation of the audio device connected to such a speaker also varies depending on the frequency of the drive signal and the input signal from which it is generated. Therefore, the technique disclosed in Patent Document 2 does not record any frequency-related information, and therefore it is impossible to perform a post hoc analysis on the cause event based on the frequency.

  More specifically, for example, there is an event that the amplifier unit has failed even though the volume is not increased so much. Also, during playback of a compact disc, overcurrent detection for device protection may be frequently performed even though the volume is not increased so much, and this compact disc is played back with a volume value of -10 dB. Even if the function stoppage due to the detection of overcurrent does not occur, other compact discs have the phenomenon that the function stoppage due to detection of overcurrent occurs even when the volume value is set to -15 dB. In some cases, the reason for the occurrence of these events is that an overcurrent flows through the amplifier unit at a frequency at which the input impedance of the speaker is low.

  Accordingly, the present application has been made in view of the above problems, and an example of the problem is an audio device and an information processing method that can easily perform failure analysis in a shorter time, and a program for the audio device. And providing an information recording medium in which the program is recorded.

  In order to solve the above-mentioned problems, according to a first aspect of the present invention, there is provided an amplifying means for amplifying an input signal and generating a driving signal for driving the speaker means in an audio apparatus connected to the speaker means. An abnormal state detecting unit for detecting an abnormal state in the amplifying unit, a signal specification detecting unit for detecting an input level and a frequency of the input signal at a timing when the abnormal state is detected, a storage unit, Storage control means for storing specification information including input level information indicating the detected input level, frequency information indicating the detected frequency, and timing information indicating the timing in the storage means. .

  In order to solve the above-mentioned problem, the invention according to claim 6 is connected to the speaker means, and the storage means and the amplification for amplifying the input signal and generating the drive signal for driving the speaker means. Means for detecting an abnormal condition in the amplification means, and an input level and a frequency of the input signal at a timing when the abnormal condition is detected, respectively. The storage unit stores specification information including a signal specification detection step to detect, input level information indicating the detected input level, frequency information indicating the detected frequency, and timing information indicating the timing. And a storage control step for storing the data.

  In order to solve the above-mentioned problem, an invention according to claim 7 is an audio apparatus comprising an amplifying means connected to speaker means and amplifying an input signal to generate a drive signal for driving the speaker means. An abnormal state detecting means for detecting an abnormal state in the amplifying means, a signal specification detecting means for detecting an input level and a frequency of the input signal at the timing when the abnormal state is detected, a storage means, Storage control means for storing specification information including input level information indicating the detected input level, frequency information indicating the detected frequency, and timing information indicating the timing in the storage means, Make it work.

  In order to solve the above-described problem, an audio device program according to an eighth aspect is recorded so as to be readable by the computer.

1 is a block diagram showing a schematic configuration of an audio apparatus according to an embodiment. It is a block diagram which shows schematic structure of the audio equipment which concerns on an Example. It is a figure explaining the FFT (Fast Fourier Transform) arithmetic processing which concerns on an Example, (a) is a figure which illustrates buffer data, (b) is a figure which illustrates the data after FFT, (c) FIG. 4 is a diagram illustrating a calculation result. It is a flowchart which shows operation | movement of the audio equipment concerning an Example, (a) is a flowchart which shows whole operation | movement, (b) is a flowchart which shows the equalizer process which concerns on an Example.

  Next, the form for implementing this application is demonstrated using FIG. FIG. 1 is a block diagram illustrating a schematic configuration of an abnormality detection device and the like according to the embodiment.

  As shown in FIG. 1, the audio apparatus S according to the embodiment is connected to speaker means 2. The audio device S includes an amplification unit 1, an abnormal state detection unit 3, a signal specification detection unit 4, a storage unit 5, and a storage control unit 6.

  In this configuration, an input signal Sin corresponding to a sound to be emitted from the speaker unit 2 is input to the amplification unit 1. The amplifying unit 3 amplifies the input signal Sin, generates a drive signal Sd for driving the speaker unit 2, and outputs it to the speaker unit 2.

  On the other hand, the abnormal state detection unit 3 connected to the amplification unit 1 detects an abnormal state in the amplification unit 1. Further, the signal specification detection unit 4 detects the input level and frequency of the input signal Sin at the timing when the abnormal state in the amplification unit 1 is detected. Then, the storage control means 6 includes input level information indicating the input level detected by the signal specification detection means 4, frequency information indicating the detected frequency, and timing information indicating the timing at which the abnormal state is detected. The signal specification detection means 4 and the storage means 5 are controlled so that the specification information Ssp including The specification information Ssp stored in this manner is used for failure analysis and the like performed afterwards.

  As described above, according to the operation of the audio apparatus S according to the embodiment, the specification information Ssp corresponding to the timing at which the amplification unit 1 detects the abnormal state is stored in the storage unit 5. Therefore, by storing frequency information in addition to input level information and timing information, failure analysis when a failure occurs can be easily performed in a shorter time. More specifically, even if the operation of the audio device S connected to the speaker means 2 whose input impedance varies depending on the frequency varies depending on the frequency of the input signal Sin or the like, information indicating the operation is stored together with the frequency information. As a result, it becomes possible to perform an ex-post analysis of the cause event of the failure based on the frequency.

  Next, specific examples corresponding to the above-described embodiment will be described with reference to FIGS. In addition, the Example demonstrated below is an Example at the time of applying this application with respect to the acoustic apparatus containing the audio apparatus which amplifies the sound signal Sad from the outside and emits a sound.

  FIG. 2 is a block diagram illustrating a schematic configuration of the sound device according to the embodiment, FIG. 3 is a diagram illustrating FFT calculation processing according to the embodiment, and FIG. 4 illustrates an operation of the sound device according to the embodiment. It is a flowchart to show. At this time, in FIG.2 and FIG.3, the same member number as each structural member in the said audio apparatus S about each structural member of the Example corresponding to each structural member in the audio apparatus S which concerns on embodiment shown in FIG. Used.

  As shown in FIG. 2, the acoustic device AP according to the example includes an audio device SS corresponding to the audio device S according to the embodiment, and a speaker 2 as an example of the speaker unit 2. In addition, the acoustic device AP can be connected to an external server device 22 via the portable radio telephone 20 and the communication line 21. This portable wireless telephone 20 is simply referred to as a portable telephone 20 in the following description.

  The audio apparatus SS according to the embodiment includes a volume unit 10, a delay unit 11, an equalizer 12 as an example of an attenuation unit, an amplification unit 1 as an example of an amplification unit, and an example of an abnormal state detection unit 3. Overcurrent detection unit 3, buffer 13, FFT calculation unit 14, calculation result storage unit 15, system control unit 6 as an example of storage control means 6, and equalizer process determination unit 16 as an example of comparison means The real-time clock generation unit 17 and the log storage unit 5 as an example of the storage unit 5 are configured. At this time, the buffer 13, the FFT calculation unit 14, the calculation result storage unit 15, and the system control unit 6 correspond to an example of the signal specification detection unit 4.

  Next, the operation will be described.

  The volume unit 10 attenuates the sound signal Sad input from the outside corresponding to the sound to be emitted from the speaker 4 by the attenuation rate designated by the operation of the operator of the acoustic device AP. Sin is generated and output to the delay unit 11 and the buffer 13. Information indicating the set value of the volume unit 10 at this time is output to the system control unit 6. The delay unit 11 delays the input signal Sin by a preset delay time corresponding to an equalizer process described later, and outputs the delayed signal to the equalizer 12. The equalizer 12 attenuates only an input signal Sin having a frequency, which will be described later, as necessary by an equalizer process, which will be described later, and outputs the attenuated signal to the amplification unit 1. The amplifying unit 1 amplifies the input signal Sin and outputs the amplified signal to the speaker 2 as the drive signal Sd. Thereby, a sound corresponding to the sound signal Sad is emitted from the speaker 2.

  On the other hand, the buffer 13 to which the input signal Sin is input samples the input signal Sin at predetermined time intervals and stores it as buffer data. At this time, buffer data BD discrete with respect to the time axis is stored in the buffer 13 based on the input signal Sin, as illustrated in FIG. Next, the FFT operation unit 14 performs an FFT operation on each of the buffer data BD stored in the buffer 13 and stores the operation result in the operation result storage unit 15 at each sampling timing. At this time, the result of performing the FFT operation on each of the buffer data BD is, for example, as shown in FIG. 3B, the input signal Sin corresponding to each buffer data BD for each sampling timing and for each frequency. It shows the input level. As a result, the calculation result R stored in the calculation result storage unit 15 becomes data indicating the input level for each sampling timing and for each frequency, as illustrated in FIG. The calculation result R is read by the system control unit 6 as necessary.

  On the other hand, the overcurrent detection unit 3 detects an overcurrent generated in the amplification unit 1 by using a method similar to the method disclosed in Patent Document 1, for example. Thereafter, when it is detected that the overcurrent has occurred, the overcurrent detection unit 3 outputs an overcurrent detection signal indicating that fact to the system control unit 6. Further, the real-time clock generation unit 17 always counts the current time and outputs a real-time clock indicating the current time to the system control unit 6.

  When the overcurrent detection signal is output from the overcurrent detection unit 3, the system control unit 6 reads out the calculation result R of the sampling timing corresponding to the timing at which the overcurrent occurs from the calculation result storage unit 15. Then, the system control unit 6 adds time information indicating the timing to the read calculation result R and information indicating the set value of the volume unit 10 at the timing, which is illustrated in FIG. Generate log data LG. The log data LG is output and stored in the log storage unit 5 as the specification information Ssp. As a result of these operations, the log storage unit 5 shows time information indicating the timing at which an overcurrent has occurred in the amplification unit 1 and the set value of the volume unit 10 at that timing, as illustrated in FIG. Log data LG including information and a calculation result R corresponding to the timing is accumulated at each timing when the overcurrent occurs.

  On the other hand, the system control unit 6 controls the equalizer processing unit 16 to execute the later-described equalizer processing in the equalizer 12. Further, the system control unit 6 outputs the log data LG stored in the log storage unit 5 to the server device 22 via the mobile phone 20 and the communication line 21 at a timing described later. The server device 22 stores the output log data LG.

  Next, the operation | movement which concerns on the Example in the system control part 6 mentioned above is demonstrated collectively using Fig.4 (a).

  As shown in FIG. 4A, the system control unit 6 according to the embodiment outputs the overcurrent detection signal from the overcurrent detection unit 3 when a power switch (not shown) as the acoustic device AP is turned on. It is monitored whether or not it has been received (step S1). In the operation of step S1, when no overcurrent detection signal is output (step S1; NO), the system control unit 6 proceeds to the operation of step S7 described later. On the other hand, if an overcurrent detection signal is output in the monitoring in step S1 (step S1; YES), the system control unit 6 reads the real-time clock from the real-time clock generation unit 17 (step S2), and uses the read real-time clock. Information indicating the set value of the volume unit 10 at the indicated timing is read (step S3).

  Next, the system control unit 6 reads the calculation result R corresponding to the timing from the calculation result storage unit 15 (step S4), generates the log data LG including the calculation result R, and stores it in the log storage unit 5. (Step S5). Thereafter, the system control unit 6 stores the log data LG stored in the log storage unit 5 in the server device 22 via the mobile phone 20 and the communication line 21 (step S6). Next, the system control unit 6 confirms whether or not the power switch of the acoustic device AP is turned off (step S7). If the power switch is not turned off in the confirmation in step S7 (step S7; NO), the system control unit 6 proceeds to the monitoring in step S1. On the other hand, when the power switch is turned off in the confirmation in step S7 (step S7; YES), the acoustic device AP ends the operation of the embodiment as it is.

  Next, the equalizer process according to the embodiment, which is executed by the equalizer process determination unit 16 and the equalizer 12 under the control of the system control unit 6, will be described with reference to FIG. The equalizer process is a process repeated in the system control unit 6, the equalizer process determination unit 16, and the equalizer 12, for example, as an interrupt process for each preset timing.

  In the equalizer processing according to the embodiment, as shown in FIG. 4B, the equalizer processing determination unit 16 determines whether any log data LG is stored in the log storage unit 5 via the system control unit 6. Monitoring is performed (step S10). In the monitoring in step S10, when the log data LG is not yet stored (step S10; NO), the equalizer process determination unit 16 ends the equalizer process according to the embodiment. On the other hand, when the log data LG is stored in the monitoring in step S10 (step S10; YES), the equalizer process determination unit 16 uses the input level of the frequency having the highest input level from the log data LG as a threshold value. Then, it is determined whether or not the input level of the frequency in the input signal Sin currently input is equal to or higher than the threshold (step S11). In the determination operation of step S11, for example, in the log data LG illustrated in FIG. 3D, that is, the log data LG at the timing when the overcurrent is generated in the amplification unit 1, the maximum value of the input level of the input signal Sin is It is “124” when the frequency is 100 Hz. Therefore, in the determination operation of step S11, the input level “124” of the input signal Sin having a frequency of 100 Hz is set as a threshold value. Then, the equalizer process determination unit 16 determines whether or not the input level of the frequency 100 Hz in the currently input signal Sin is equal to or higher than the threshold “124”.

  In the determination operation of step S11, when the input level of the frequency (for example, 100 Hz) in the currently input signal Sin is not equal to or higher than the threshold (for example, “124”) (step S11; NO), the equalizer process determination unit 16 Ends the equalizer processing according to the embodiment. On the other hand, if it is determined in step S11 that the input level of the frequency in the input signal Sin that is currently input is equal to or higher than the threshold (step S11; YES), the equalizer processing determination unit 16 controls the equalizer 12 to control the input signal. After the input level of the frequency (for example, 100 Hz) in Sin is set to be less than the threshold value (for example, “124”), the amplification unit 1 outputs the input level. At this time, the equalizer processing determination unit 16 controls the equalizer 12 so that only the input level of the frequency in the input signal Sin is less than the threshold and the input levels of the input signals Sin of other frequencies are not attenuated.

  As described above, according to the operation of the acoustic device AP according to the embodiment, the log data LG corresponding to the timing when the abnormal state is detected in the amplifying unit 1 is stored, so that the input is performed in addition to the input level and the time information. By storing the frequency of the signal Sin, the failure analysis at the time of the failure can be easily performed in a shorter time.

  Further, since the storage of the log data LG is repeated every time an overcurrent occurs, the log data LG is continuously stored, so that failure analysis at the time of failure can be performed more easily in a shorter time.

  Furthermore, since the log data LG is output to and stored in the external server device 22, each information can be accumulated in the server device 22 and used for failure analysis.

  Furthermore, when the input level of the input signal Sin is equal to or higher than the input level stored as the log data LG, the input signal Sin is attenuated so that the input level of the input signal Sin is less than the stored input level. Therefore, the abnormal state in the amplifying unit 1 can be prevented from occurring. Further, since only the input signal Sin having the frequency indicated by the log data LG is attenuated and the input signal Sin having the other frequency is used as it is to generate the drive signal Sd, the abnormal state can be obtained without making the listener feel uncomfortable. Occurrence can be prevented.

  Further, since the log data LG corresponding to the timing at which the overcurrent has occurred in the amplification unit 1 is stored, a failure of the amplification unit 1 can be effectively prevented.

  In the above-described embodiment, the abnormal state detection unit is configured to detect the occurrence of an overcurrent in the amplification unit 1 as an abnormal state, but in addition to this, for example, a temperature abnormality in the amplification unit 1 or the entire audio device SS or It may be configured to detect a power supply voltage abnormality or a DC offset (DC voltage component appearing at the output of the amplifying unit 1) abnormality, etc., and log data LG corresponding to the timing at which a detection signal indicating these detections is generated is detected as an overcurrent. Instead of the log data LG corresponding to the generated timing, or together with the log data LG corresponding to the timing when the overcurrent occurs, the log storage unit 5 may store the log data. As the log data LG in this case, in addition to the configuration illustrated in FIG. 4D, it is preferable that each log data LG includes information that clearly indicates which abnormality is the log data LG. .

  Further, a program corresponding to the flowchart shown in FIG. 4A is recorded on a recording medium such as a flexible disk or a hard disk, or is acquired via a network such as the Internet, and is stored in a general-purpose microcomputer. It is also possible to cause the microcomputer or the like to function as the system control unit 6 according to the embodiment by reading and executing the above.

  Also, a program corresponding to the flowchart shown in FIG. 4B is recorded on a recording medium such as a flexible disk or a hard disk, or obtained via a network such as the Internet, and this is stored in a general-purpose microcomputer. It is also possible to cause the microcomputer or the like to function as the equalizer processing determination unit 16 according to the embodiment by reading and executing the above.

1 Amplification means (amplification unit)
2 Speaker means (speaker)
3 Abnormal state detection means (overcurrent detection unit)
4 signal specification detection means 5 storage means (log storage unit)
6 Storage control means (system controller)
DESCRIPTION OF SYMBOLS 10 Volume part 11 Delay part 12 Equalizer 13 Buffer 14 FFT operation part 15 Operation result memory | storage part 16 Equalizer process judgment part 17 Real-time clock generation part 20 Portable radio telephone (cell-phone)
21 Communication line S, SS Audio device AP Audio device BD Buffer data R Calculation result LG Log data

Claims (8)

In the audio device connected to the speaker means,
Amplifying means for amplifying an input signal and generating a drive signal for driving the speaker means;
An abnormal condition detection means for detecting an abnormal condition in the amplification means;
Signal specification detection means for respectively detecting the input level and frequency of the input signal at the timing when the abnormal state is detected;
Storage means;
Storage control means for storing specification information including input level information indicating the detected input level, frequency information indicating the detected frequency, and timing information indicating the timing in the storage means;
An audio device comprising: The audio device according to claim 1.
The audio apparatus according to claim 1, wherein the storage control unit repeats storing the specification information corresponding to the timing in the storage unit each time the abnormal state is detected. The audio device according to claim 1 or 2,
An audio apparatus, further comprising output means for outputting and storing the specification information to an external server device connected via a network. The audio device according to claim 1 or 2,
A storage input level which is the input level indicated by the input level information included in the specification information including the frequency information indicating the same frequency as the frequency of a newly input signal; A comparison means for comparing a new input level which is the input level of a newly input signal;
Attenuating means for attenuating the newly input signal and outputting it to the amplifying means so that the new input level is less than the memorized input level when the new input level is equal to or higher than the memorized input level; ,
An audio device comprising: The audio device according to any one of claims 1 to 4,
The audio apparatus according to claim 1, wherein the abnormal state is an overcurrent generation state in the amplification means. In an information processing method executed in an audio device connected to speaker means and comprising storage means and amplification means for amplifying an input signal and generating a drive signal for driving the speaker means,
An abnormal state detecting step of detecting an abnormal state in the amplification means;
A signal specification detection step for detecting an input level and a frequency of the input signal at the timing when the abnormal state is detected;
A storage control step of storing specification information including input level information indicating the detected input level; frequency information indicating the detected frequency; and timing information indicating the timing;
An information processing method comprising: A computer included in an audio device, connected to speaker means and provided with an amplifying means for amplifying an input signal and generating a drive signal for driving the speaker means;
An abnormal state detecting means for detecting an abnormal state in the amplifying means;
Signal specification detection means for detecting the input level and frequency of the input signal at the timing when the abnormal state is detected, respectively;
Storage means, and
Storage control means for storing specification information including input level information indicating the detected input level; frequency information indicating the detected frequency; and timing information indicating the timing;
A program for an audio apparatus, characterized by causing the function to function as:   8. An information recording medium in which the audio device program according to claim 7 is recorded so as to be readable by the computer.

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