JP2006010631A - Sound information acquisition system, sound information acquiring device, noncontact diagnosis system, and noncontact diagnosis method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a precise and efficient sound information acquisition system and a noncontact diagnosis system. <P>SOLUTION: The sound information acquisition system for acquiring sound information for diagnosing whether a diagnosis target is normal or abnormal comprises a storage that is provided corresponding to each diagnosis target and stores information peculiar to each diagnosis target in advance; and a sound information acquisition device, having a peculiar information reading section for reading peculiar information from the storage, a reference distance acquisition section for acquiring reference distance from the diagnosis target when acquiring sound information, based on the peculiar information of the diagnosis target, an actual distance measurement section for measuring actual distance from the diagnosis target, a comparison section for comparing the actual distance RL with the reference distance SL, a sound signal detection section for detecting a sound signal, an output section for outputting the comparison result when it is determined that RL is equal to or smaller than SL by the comparison section, and a sound information acquisition section for acquiring the sound signal detected by the sound signal detection section as sound information for diagnosis, when the comparison result of RL≤SL is outputted from the output section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-contact diagnosis system and a non-contact diagnosis method for diagnosing the diagnosis target as normal or abnormal based on sound information generated by the diagnosis target, and a sound information acquisition system and system for acquiring such sound information. The present invention relates to a sound information acquisition device used in the above.

  For example, a non-contact diagnostic system that uses a sound collector to acquire sound information generated by an operating device and performs time-series analysis such as wavelet analysis on the sound information, thereby diagnosing normality or abnormality of the device. It has been known. Since the sound generated by the diagnosis target such as the operating unit changes according to the deterioration of the diagnosis target, for example, the deterioration can be predicted by examining the change of the sound. Further, if the frequency band of the sound in which the deterioration of the diagnosis target is significantly reflected is known in advance, the diagnosis can be made with high accuracy by examining the sound in the frequency band.

  In such a non-contact diagnosis system and a sound information acquisition system that acquires sound information for this diagnosis, sound information, that is, time-series data of sound pressure levels in a predetermined frequency band (actual Is converted to voltage by a microphone, passes only a predetermined frequency band, and is further converted to digital data of a predetermined sampling frequency by A / D (analog / digital) conversion). In order to acquire under conditions, it is necessary to detect the sound signal by always arranging the sound collector at a fixed position with respect to the diagnosis target. Moreover, it is preferable that this fixed position, especially the distance between the sound collector and the diagnostic object, is also a distance unique to the diagnostic object.

Therefore, for example, when making a diagnosis using a portable sound collector, prior to the diagnosis, the operator holds the sound collector away from the diagnosis object by a reference distance corresponding to the diagnosis object, and It is necessary to detect a sound signal.
Japanese Patent Laid-Open No. 8-219955

  By the way, consider the case where the above-described sound information acquisition system and non-contact diagnosis system using a portable sound collector are applied to inspection, patrol, constant monitoring, etc. of power equipment such as a power plant. For this purpose, the operator must hold, for example, one sound collector separated by a reference distance corresponding to the diagnostic object for each of many diagnostic objects. Therefore, the operator must arrange the sound collector with respect to the diagnosis target by separately referring to, for example, a database in which the reference distance is associated with the diagnosis target. Also, in power facilities, etc., it is necessary to place a mark or the like at a position separated by the reference distance for each diagnosis target, and the operator can reproduce the sound collector at the position of this mark every time measurement is performed. It is necessary to arrange well. These operations are inefficient because they take time and effort.

  In particular, when sound information data is periodically acquired for one diagnosis target and normal or abnormal diagnosis is performed based on the tendency, when the number of diagnosis targets increases, the operator increases the number of diagnosis targets (N ) Must be multiplied by the number of acquisition times (M times) (N × M times). For this reason, the arrangement | positioning operation | work mentioned above becomes more inefficient.

  In particular, the parabolic sound collector is capable of acquiring sound information with high directivity with higher accuracy, but more reproducible in the arrangement direction with respect to the diagnosis target. That is, sound information may vary each time it is detected unless it is accurately arranged with respect to the diagnosis target with a reference distance and a reference direction. Such a variation becomes noise with respect to a change in sound information resulting from the deterioration of the diagnosis target, and thus cannot be diagnosed with high accuracy. For this reason, if it is going to perform the arrangement | positioning operation | work mentioned above, improving the precision of a diagnosis, the said arrangement | positioning operation | work will become more inefficient.

  This invention is made | formed in view of this subject, The place made into the objective is to provide a highly accurate and efficient sound information acquisition system and a non-contact diagnostic system.

  The invention for solving the above problems is a sound information acquisition system for acquiring sound information generated by the diagnosis target in order to diagnose normality or abnormality of the diagnosis target, and is provided for each diagnosis target, A storage device preliminarily storing unique information about each diagnosis target, a unique information reading unit that reads the unique information from the storage device corresponding to the corresponding diagnosis target, and the sound information that is generated when the diagnosis target is acquired A reference distance acquisition unit that acquires a reference distance from the diagnosis target based on specific information about the diagnosis target, an actual distance measurement unit that measures an actual distance from the diagnosis target, and the actual distance and the reference distance When the comparison unit compares the comparison unit, the sound signal detection unit that detects a sound signal from the diagnosis target, and the comparison unit that the actual distance is equal to or less than the reference distance, the comparison result is output. When a comparison result indicating that the actual distance is equal to or less than the reference distance is output from the output unit, the sound signal detected by the sound signal detection unit can be acquired as diagnostic sound information. And a movable sound information acquisition device having a sound information acquisition unit.

  The invention for solving the above-mentioned problem is a sound information acquisition system for acquiring sound information generated by a diagnosis object in order to diagnose normality or abnormality of the diagnosis object, and is provided for each diagnosis object. A storage device preliminarily storing unique information about each diagnosis object, a unique information reading unit that reads the unique information from a storage device corresponding to the diagnosis object, and sound information generated by the diagnosis object A reference distance acquisition unit that acquires a reference distance from the diagnosis target based on specific information about the diagnosis target, an actual distance measurement unit that measures an actual distance from the diagnosis target, the actual distance, and the reference distance A sound signal detection unit that detects a sound signal from the diagnosis target, and the sound signal detection unit when the actual distance is equal to or less than the reference distance. Comprising and a sound information acquisition device movable with the sound information acquisition unit that acquires a more detected sound signal as sound information for diagnosis.

In the sound information acquisition system, the unique information may be information indicating the reference distance between a corresponding diagnosis target and the sound information acquisition device.
In the sound information acquisition system, the unique information is ID information for specifying a corresponding diagnosis target, and the sound information acquisition device generates the ID information and the diagnosis target for each diagnosis target. You may further have the distance memory | storage part with which the said reference distance at the time of acquiring the sound information to perform was matched previously.
In the sound information acquisition system, the output unit includes a sound generation unit that generates sound as the comparison result, a determination display unit that displays the comparison result, and a vibration generation unit that generates vibration as the comparison result. You may have at least one of these.

  According to this sound information acquisition system, the actual distance measurement unit can measure the actual distance (RL) between the diagnosis target and the sound information acquisition device. The reference distance acquisition unit can acquire a reference distance (SL) between the diagnosis target and the sound information acquisition device based on the unique information read from the storage device by the unique information reading unit. Prior to diagnosis, RL and SL acquired above are compared by the comparison unit. When RL ≦ SL, the sound information acquisition device acquires the sound signal detected by the sound signal detection unit as sound information for diagnosis. it can. For example, if the SL is an upper limit value in which the change in the diagnosis target is reflected in the change in the sound information, the operator can simply move the sound information acquisition device closer to the diagnosis target, and the sound information is always in a suitable SL. Can be obtained. In addition, since this SL can be automatically acquired from the storage device, for example, the worker can save time and effort to check the SL himself. Furthermore, if the RL is automatically measured, for example, the operator can save the trouble of placing the sound information acquisition device on a mark or the like added in advance, and the sound information acquisition device can be made higher than the diagnosis target. Can be placed with accuracy. Therefore, the present invention provides a highly accurate and efficient sound information acquisition system.

  In the sound information acquisition system, the unique information further includes information indicating a measurement procedure of sound information generated by the corresponding diagnosis target, and the sound information acquisition device measures sound information generated by the diagnosis target. You may further have a measurement guidance part which carries out measurement guidance based on the information which shows a procedure.

  In the sound information acquisition system, the sound information acquisition device includes, for each diagnosis target, a measurement procedure storage unit in which information indicating a measurement procedure of sound information generated by the diagnosis target is stored; and the measurement procedure storage unit A measurement guide unit that performs measurement guidance based on information indicating a measurement procedure of sound information generated from the diagnosis target that is read based on the unique information.

In the sound information acquisition system, the measurement guide unit may perform measurement guidance using sound from the sound generation unit.
In the sound information acquisition system, the measurement guide unit may perform measurement guidance using a guide display unit that displays the measurement procedure.

According to this sound information acquisition system, for example, the operator can bring the sound information acquisition device closer to the diagnosis target according to the sound or display of the measurement guidance. In addition, since this measurement guide can be automatically acquired from a storage device or a measurement procedure storage unit, for example, an operator can save time and effort to examine the measurement procedure according to the diagnosis target. Furthermore, the operator can save the trouble of arranging the sound information acquisition device according to a mark or the like attached in advance, and can arrange the sound information acquisition device with respect to the diagnosis target with higher accuracy.
In the sound information acquisition system, the sound information acquisition device may be a parabolic sound collector.

  While this parabolic sound collector can acquire sound information generated by a diagnosis object with high directivity with higher accuracy, it requires more reproducibility of the arrangement direction with respect to the diagnosis object. In general, since the accuracy of distance is also reflected in the accuracy of directivity, according to the present invention, the parabolic sound collector can be arranged with high accuracy with respect to the diagnosis target, and thus sound information can be acquired with higher accuracy.

  Further, in this sound information acquisition system, the sound information acquisition device, for each diagnosis target, a sampling frequency for collecting sound information generated by the diagnosis target, a sampling frequency for storing information indicating a sampling time, and a sampling time storage The sound signal detection unit indicates a sampling frequency and a sampling time of the sound information that is read from the sampling frequency and the sampling time storage unit based on the specific information and is generated by the corresponding diagnosis target. Based on the information, a sound signal generated by the diagnosis target may be detected.

  In the sound information acquisition system, the sound information acquisition device further includes, for each diagnosis target, an amplification factor storage unit that stores information indicating an amplification factor of sound information generated by the diagnosis target. The signal detection unit reads the sound signal generated by the diagnosis target based on the information read from the gain storage unit based on the specific information and indicating the amplification factor of the sound information generated by the corresponding diagnosis target. It may be detected.

In the sound information acquisition system, the sound information acquisition device may further include a filter unit that extracts a predetermined frequency component of sound information generated by the diagnosis target.
In the sound information acquisition system, the filter unit extracts a first filter that extracts a frequency component equal to or lower than a first frequency, and a frequency component equal to or higher than a second frequency that is lower than the first frequency. And a second filter.

  In the sound information acquisition system, the sound information acquisition device further includes, for each diagnosis object, a frequency storage unit in which information indicating a frequency to be extracted in sound information generated by the diagnosis object is stored. The filter unit may be set to a characteristic according to information indicating a frequency to be extracted in sound information generated from the diagnosis target, which is read from the frequency storage unit based on the unique information.

  According to this sound information acquisition system, the sampling frequency, the sampling time, the amplification factor, and the frequency band specific to the diagnosis target can be automatically acquired from, for example, the three storage units described above. Therefore, for example, it is possible to save the labor for the operator to examine these themselves, and to obtain sound information under suitable conditions for each diagnosis object so that the change in the diagnosis object is reflected in the change in the sound information.

In the sound information acquisition system, the storage device may be a wireless IC tag, and the unique information reading unit may be a reader of the wireless IC tag.
In the sound information acquisition system, the unique information reading unit may read the unique information from the storage device based on an infrared data communication method.
In the sound information acquisition system, the actual distance measuring unit may include an infrared distance sensor or a laser pointer.
In the sound information acquisition system, the actual distance measuring unit may be a laser distance meter.

  Moreover, the invention for solving the above-described problem is a movable sound used in a non-contact diagnostic system that acquires sound information generated by a diagnosis target and diagnoses normality or abnormality of the diagnosis target based on the sound information. An information acquisition device, a unique information reading unit for reading unique information about the diagnosis target from external storage means, and a reference distance from the diagnosis target when acquiring sound information generated by the diagnosis target A reference distance acquisition unit that is acquired based on specific information about, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and a diagnosis target A sound signal detection unit for detecting a sound signal; an output unit for outputting a comparison result when the comparison is made by the comparison unit that the actual distance is equal to or less than the reference distance; and the actual distance is the reference A sound information acquisition unit that enables acquisition of the sound signal detected by the sound signal detection unit as sound information for diagnosis when a comparison result indicating that the sound signal is less than or equal to the output is output from the output unit. Become.

  Moreover, the invention for solving the above-described problem is a movable sound used in a non-contact diagnostic system that acquires sound information generated by a diagnosis target and diagnoses normality or abnormality of the diagnosis target based on the sound information. An information acquisition device, a unique information reading unit for reading unique information about the diagnosis target from external storage means, and a reference distance from the diagnosis target when acquiring sound information generated by the diagnosis target A reference distance acquisition unit that is acquired based on specific information about, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and a diagnosis target The sound signal detected by the sound signal detection unit when compared with the sound signal detection unit that detects the sound signal and the comparison unit that the actual distance is equal to or less than the reference distance is used as diagnostic sound information. And sound information acquisition unit that acquires a becomes a.

  The invention for solving the above-described problem is a non-contact diagnostic system for acquiring sound information generated by a diagnosis object and diagnosing normality or abnormality of the diagnosis object based on the sound information, and for each diagnosis object , A storage device preliminarily storing unique information about each diagnosis target, a unique information reading unit that reads the unique information from the storage device corresponding to the corresponding diagnosis target, and a sound generated by the diagnosis target A reference distance acquisition unit that acquires a reference distance from the diagnosis target when acquiring information based on unique information about the diagnosis target; an actual distance measurement unit that measures an actual distance from the diagnosis target; When the comparison unit compares the distance with the reference distance, the sound signal detection unit detects a sound signal from the diagnosis target, and the comparison unit compares that the actual distance is equal to or less than the reference distance When a comparison result indicating that the actual distance is equal to or less than the reference distance is output from the output unit, the sound signal detected by the sound signal detection unit is used as a diagnostic sound. A sound information acquisition device having a sound information acquisition unit that can be acquired as information, sound information acquired by the sound information acquisition device for each diagnosis target, and information indicating the acquisition time A sound information database stored in association with each other and a sound information generated from the sound information database based on the unique information and generated by the diagnosis object at a predetermined acquisition time in order to perform the diagnosis And an information processing device that can be connected to the sound information acquisition device.

  The invention for solving the above-described problem is a non-contact diagnostic system for acquiring sound information generated by a diagnosis object and diagnosing normality or abnormality of the diagnosis object based on the sound information, and for each diagnosis object , A storage device preliminarily storing unique information about each diagnosis target, a unique information reading unit that reads the unique information from the storage device corresponding to the corresponding diagnosis target, and a sound generated by the diagnosis target A reference distance acquisition unit that acquires a reference distance from the diagnosis target when acquiring information based on unique information about the diagnosis target; an actual distance measurement unit that measures an actual distance from the diagnosis target; When the comparison unit compares the distance with the reference distance, the sound signal detection unit detects a sound signal from the diagnosis target, and the comparison unit compares that the actual distance is equal to or less than the reference distance A sound information acquisition unit having a sound information detection unit that acquires a sound signal detected by the recording signal detection unit as diagnostic sound information, and acquired by the sound information acquisition device for each diagnosis target A sound information database that stores the recorded sound information and information indicating the acquisition time in association with each other, and the predetermined acquisition that is read from the sound information database based on the unique information to perform the diagnosis And an information processing device that can be connected to the sound information acquisition device. The information processing device includes an analysis unit that analyzes sound information generated by the diagnosis target at a time.

In the non-contact diagnosis system, the analysis unit may perform a time series analysis of the sound information.
In the non-contact diagnosis system, the analysis unit may create a trend graph of the diagnosis result.
In the non-contact diagnosis system, the analysis unit may use any one or more of wavelet analysis, fast Fourier transform, and inverse filter method.

  The invention for solving the above problem is a non-contact diagnostic method for diagnosing normality or abnormality of a diagnostic target based on sound information generated by the diagnostic information acquired by the sound information acquisition device, A unique information reading step for reading unique information about the diagnosis target from the external storage means, and a reference distance between the diagnosis target and the sound information acquisition device when acquiring sound information generated by the diagnosis target for the diagnosis target A reference distance acquisition step that is acquired based on the unique information, a comparison step that compares the reference distance with an actual distance measured between the diagnostic object and the sound information acquisition device, and the actual distance in the comparison step. Is compared to the reference distance or less, the sound information acquisition step for acquiring the sound information, and the sound acquired in the sound information acquisition step Based on the distribution, comprising and a diagnosis step of executing the diagnosis.

  A highly accurate and efficient sound information acquisition system and non-contact diagnosis system can be provided.

=== Configuration of non-contact diagnostic system ===
As illustrated in the block diagram of FIG. 1, the non-contact diagnosis system 10 according to the present embodiment includes a wireless IC tag (storage device) 100, a sound collector (sound information acquisition device) 200, and a computer (information Processing apparatus) 300. The wireless IC tag 100 is affixed in advance in the vicinity of the diagnosis target portion of the diagnosis target device. The sound collector 200 is portable and can be connected to the computer 300 through a wireless or wired communication means 350.

  The non-contact diagnosis system 10 according to the present embodiment is applied to inspection, patrol, constant monitoring, etc. of power equipment such as a power plant. The operator holds the sound collector 200 and approaches the diagnosis target portion of the diagnosis target device, acquires sound information generated from the portion, and diagnoses normality or abnormality as described later. Further, the operator connects the sound collector 200 and the computer 300 as necessary, and performs the diagnosis in more detail.

  Further, as will be described later, when the operator can refer to the guidance such as the measurement procedure and the location to be diagnosed is indicated in the guidance, the wireless IC tag 100 needs to be attached in the vicinity of the location to be diagnosed. Absent.

  In addition, the sound information acquisition system according to the present embodiment includes a wireless IC tag 100 and a sound collector 200.

The wireless IC tag 100 is a storage device having a memory 110 that stores a device ID (unique information) that identifies a diagnosis target portion in a diagnosis target device. The wireless IC tag 100 is a so-called RFID (radio frequency-identification) tag, and further includes appropriate means for transmitting the device ID. This device ID may specify one diagnosis target device, or may specify each of a plurality of diagnosis locations of one diagnosis target device. For example, if the diagnosis target device is a pump and there are a plurality of portions to be diagnosed in the pump, the device ID is set to “A105-01”, “A105-02”, or the like, for example. Here, “A105” corresponds to the pump, and “01”, “02”, and the like correspond to each diagnosis target portion in this pump. The wireless IC tag 100 according to the present embodiment may follow an active method with a built-in power supply, or may be a passive method that operates using a radio wave transmitted from a reader 230 described later as a power supply without incorporating a power supply. It may be. The memory 110 of the present embodiment is, for example, an EPROM or an E ² PROM. In the case of the active method, the memory 110 may be a volatile memory such as SRAM, but is preferably a nonvolatile memory such as EPROM or E ² PROM.

  The sound collector 200 includes a parabola-shaped portion 240 with respect to a main body portion 250 mainly including a microphone (sound signal detection portion) 220 that detects a sound signal from a diagnosis target portion. In the vicinity of the microphone 220, a laser distance meter (actual distance measuring unit) 210 and a reader (unique information reading unit) 230 are further provided.

  The laser distance meter 210 mainly includes appropriate means for outputting laser light and appropriate means for detecting the laser light reflected at the diagnosis target location, in the vicinity of the laser distance meter 210. It has a function of measuring the distance (actual distance, RL) from the microphone 220 to the diagnosis target location. The distance RL may be acquired by the laser distance meter 210, or an appropriate signal is transmitted from the above-described means for detecting the laser light to the control unit 400, which will be described later. It may be calculated.

  The reader 230 has a function of reading a device ID stored in the memory 110 through a radio wave from the wireless IC tag 100 by transmitting a radio wave of a predetermined frequency to the wireless IC tag 100 described above.

  Note that the microphone 220, the laser distance meter 210, and the reader 230 of the present embodiment are arranged so that the microphone 220 and the laser distance meter 210 become the diagnosis target location when the operator points the parabolic portion 240 toward the diagnosis target location. The readers 230 are provided adjacent to each other so that they are selectively directed and the reader 230 is substantially directed to the wireless IC tag 100. Alternatively, as will be described later, when the operator can refer to the guidance such as the measurement procedure and the diagnosis target location is indicated in the guidance, the wireless IC tag 100 needs to be attached in the vicinity of the diagnosis target location. Absent.

  The computer 300 is a portable notebook information processing apparatus, for example, and has an acoustic database (sound information database) 310. As will be described later, the acoustic database 310 stores data in which time series data of sound pressure levels as sound information acquired by the sound collector 200 is associated with each diagnosis target device for each diagnosis time. Have.

  The computer 300 also has storage means for storing an appropriate program for performing time-series analysis on the time-series data and creating a trend graph of diagnostic results obtained by the analysis. This program includes algorithms such as wavelet analysis, fast Fourier transform, and inverse filter method.

  As illustrated in the block configuration diagram of FIG. 2, the sound collector 200 of the present embodiment controls the microphone 220, the laser distance meter 210, the reader 230, and the like described above in the main body 250 (FIG. 1). A control unit 400 is further provided. The control unit 400 is further provided with an input / output panel 600 that is provided in the main body unit 250 and functions as an interface with an operator, and a ROM (distance storage unit, measurement procedure storage unit, sampling time) that stores device data described later. A storage unit, an amplification factor storage unit, a filter upper limit / lower limit frequency storage unit, a sampling frequency storage unit) 700 and a RAM 800 that stores acoustic data to be described later. Note that the ROM 700 may store an appropriate program for performing time series analysis on the acoustic data and creating a trend graph of the diagnosis result obtained by the analysis. In addition, the computer 300 can arbitrarily rewrite data and perform additional writing. This program includes algorithms such as wavelet analysis, fast Fourier transform, and inverse filter method. Thereby, as will be described later, the sound information acquired by the acoustic mechanism 500 is simply diagnosed in the sound collector 200.

  The sound information detected by the microphone 220 is first amplified as an analog signal by an amplifier (amplifying unit) 510, a predetermined frequency component is extracted by a filter (filter unit) 520, and converted into a digital signal by an A / D converter 530. It is supposed to be converted. That is, the acoustic mechanism 500 including the microphone 220, the amplifier 510, the filter 520, and the A / D converter 530 is controlled by the control unit 400 to detect a sound signal and generate a sound as a sound pressure level in a predetermined frequency band. Information. Note that the filter 520 of the present embodiment includes a low-pass filter (first filter) and a high-pass filter (second filter).

  As will be described later, the input / output panel 600 includes a measurement switch 255 (FIGS. 1 and 2) that is pressed by the operator in order for the acoustic mechanism 500 to acquire sound information, and the sound information measurement procedure and diagnostic results to the operator. And a display (determination display unit, guidance display unit) 253 (FIGS. 1 and 2) and a speaker (sound generation unit) 251 (FIGS. 1 and 2).

  As illustrated in the chart of FIG. 3A, the device data stored in the ROM 700 includes a device name, a reference distance SL, a measurement procedure, a sampling frequency, a sampling time, an amplification factor, The cutoff frequency (upper limit and lower limit), inspection order, and the like are associated with each other.

  The reference distance SL is a distance (cm) between the diagnosis location and the microphone 220 that is suitable for the microphone 220 to detect sound information generated from the diagnosis location of the diagnosis target device. The reference distance SL is, for example, a distance at which the deterioration is reflected in a change in sound information acquired by the sound collector 200 when the diagnosis target portion is deteriorated, or an upper limit value of the distance. In the case of the upper limit value, this reference distance SL may further have a lower limit value in order to give the position of the sound collector 200 to be arranged when detecting the sound signal. As illustrated in FIG. 3A, the reference distance SL of the present embodiment is set to a lower limit value L1 (= 100-5) and an upper limit value L2 (= 100 + 5), for example, “100 ± 5”. )have.

  The measurement procedure is, for example, diagnosis when the sound collector 200 determines whether or not the actual distance RL measured by the laser rangefinder 210 is within the range between the lower limit value L1 and the upper limit value L2 of the reference distance SL. This is information indicating how the sound collector 200 approaches the target device. This measurement procedure may define the direction in which the sound collector 200 is brought closer based on, for example, a mark previously attached to the diagnosis target device. As will be described later, this information can be displayed on the display 253 and serve as an operation guidance for the operator.

  The sampling frequency (Hz) is the number of discrete values stored per second when the sound data detected by the microphone 220 is converted into digital data and stored as discrete time series data. (Frequency) is the sampling period. Note that since the sampling frequency, which is the number of discrete values per second, and the time between two discrete values, that is, the sampling period, are equivalent, either the sampling frequency or the sampling period may be used. . The sampling time (seconds) is the time for storing the sound signal detected by the microphone 220.

  In addition to the sampling frequency and sampling time described above, sound such as the amplification factor (times) of the amplifier 510, the upper limit frequency (first frequency, Hz) of the low-pass filter, and the lower limit frequency (second frequency, Hz) of the high-pass filter Parameters for determining the characteristics of the mechanism 500 are also given for each device ID.

  The above device data is individually set so that, for example, the deterioration of the diagnosis target device is significantly reflected in the change in the sound information.

  Moreover, as illustrated in FIG. 3A, the inspection order in the entire power facility at the diagnosis target portion of the diagnosis target device specified by the device ID is associated with the device ID. As will be described later, the operator is notified of the next diagnosis target location and the like based on the inspection order.

=== Non-contact diagnosis method ===
<<< Acquisition of sound information >>>
An operation procedure of the control unit 400 when the sound collector 200 in the non-contact diagnostic system 10 having the above-described configuration acquires sound information will be described based on the flowchart of FIG. It is assumed that the sound collector 200 is appropriately set in a standby state, and the parabola-shaped portion 240 is held by an operator so as to point the diagnosis target device. However, at this time, the parabolic shape portion 240 of the sound collector 200 is only substantially oriented with respect to the diagnosis target portion, and the arrangement of the sound collector 200 is not accurate.

  First, the control unit 400 of the sound collector 200 reads the device ID stored in the memory 110 of the wireless IC tag 100 attached to the diagnosis target device by controlling the reader 230 (S900).

  Next, the control unit 400 refers to the device data (FIG. 3A) stored in the ROM 700, and the device name, reference distance, measurement procedure, sampling frequency, sampling time, amplification factor associated with the device ID. Then, the upper limit frequency and the lower limit frequency are read (S901). These device data may be temporarily stored in an appropriate memory, for example, and read from this memory when necessary in the subsequent processing procedure. Alternatively, the data may be read from the ROM 700 as each data is required.

  Next, the control unit 400 displays the measurement procedure read from the ROM 700 on the display 253 (S902). The worker arranges or moves the sound collector 200 according to the display content.

For example, when the wireless IC tag 100 is affixed to an arbitrary location of the diagnosis target device and the diagnosis target location is indicated in the measurement procedure described above, as illustrated in the schematic diagram of FIG. The display 253 displays “Please measure position ○”. An operator who has pointed the parabolic portion 240 toward the diagnosis target device to such an extent that communication with the wireless IC tag 100 is possible is previously marked with “position ○ number” on the diagnosis target device, for example, according to this guidance. The parabolic shape portion 240 is redirected to the diagnosis target portion.
For example, when “Please measure downward from the upper portion 30 cm of the location ○” in FIG. 5B is displayed on the display, the operator places the sound collector 200 at the position of the upper portion 30 cm of the location. , The parabolic portion 240 is directed downward, and the sound collector 200 is moved downward from this position.
Further, for example, when “Measure from position ○ to position ●” in FIG. 5C is displayed on the display, the operator repositions the sound collector 200 at the position ○, The parabola-shaped portion 240 is directed to the position ● and the sound collector 200 is moved to the position.

While the operator moves the sound collector 200 according to the above-described guidance, the control unit 400 controls the laser distance meter 210 to measure the actual distance RL between the microphone 220 and the diagnosis target location ( In step S903, it is determined whether the actual distance RL is within the range of the reference distance SL read from the ROM 700 (L1 ≦ RL ≦ L2) (S904).
If it is determined that L1 ≦ RL ≦ L2 is satisfied (S904: YES), the control unit 400 generates, for example, a sound in the speaker 251 in the input / output panel 600, and informs the operator that the current position is within the reference distance SL. (S905).

  When the signal of the measurement switch 255 pressed by the operator is received (S906: YES), the control unit 400 controls the acoustic mechanism 500 and acquires sound information generated by the diagnosis target portion (S907). Here, the sampling frequency, the sampling time, the amplification factor, the upper limit frequency, the lower limit frequency, and the like read from the ROM 700 are conditions for obtaining sound information by the acoustic mechanism 500. Further, the sound mechanism 500 has a sound pressure level time-series data (actually converted into a voltage by the microphone 220, only the predetermined frequency band is passed by the filter 520, and further, the A / D converter 530 The sound information, which is time-series data converted into digital data of a predetermined sampling frequency, is associated with the diagnosis time measured by appropriate means, and is stored in the RAM 800 as acoustic data (FIG. 3B). )reference).

<<< Diagnosis of sound information >>>
As illustrated in the flowchart of FIG. 4, based on an appropriate program stored in the ROM 700, the control unit 400 analyzes the acoustic data stored in the RAM 800 and simply diagnoses normality or abnormality of the diagnosis target portion. (S908). Here, if the RAM 800 also stores past acoustic data, the control unit 400 can create a trend graph of simple diagnosis results.

  Next, the control unit 400 transmits the acoustic data stored in the RAM 800 to the computer 300 through the communication unit 350 (S909).

  In addition, the control unit 400 displays the simple diagnosis result acquired in step S908 on the display 253 (S910). If it is determined in step S908 that there is an abnormality in the part to be diagnosed, the worker is notified, for example, “There is an abnormality in the part Δ of the device ○” via the display 253 (FIG. 6A )reference). If a trend graph is created in step S908, it is displayed on the display 253 (see FIG. 6B).

  When the signal of the measurement switch 255 pressed again by the operator is received (S911: YES), the control unit 400 searches the device data stored in the ROM 700 for the device name with the next inspection order, and The device name is displayed on the display 253 (S912). The operator confirms the device name (see FIG. 6C) displayed on the display 253 and performs the next diagnosis. Note that the measurement switch 255 of this embodiment also has a function for switching the display on the display 253.

  Note that the computer 300 that has received the acoustic data from the sound collector 200 in step S909 stores the acoustic data in the acoustic database 310 as time-series data in association with the diagnosis target portion. If this time-series data is obtained by associating all sound information from the past to the present with respect to each diagnosis target location, the worker performs a more detailed diagnosis using the computer 300. Moreover, if this time series data consists of the acoustic data with respect to the diagnostic object location of the whole electric power installation, for example, an operator will diagnose the whole electric power installation by the one computer 300, for example. Here, an appropriate CPU included in the computer 300 and an appropriate program that causes the CPU to execute such analysis and diagnosis operations correspond to the analysis unit.

  Further, in the present embodiment, the control unit 400 and an appropriate program for causing the control unit 400 to perform the operations of Step S901, Step S902, and Step S904 described above include a reference distance acquisition unit, a measurement guide unit, and Each corresponds to a comparison unit.

  In steps S903 to S905, the speaker 251 generates sound when the sound collector 200 is arranged so as to satisfy the condition of L1 ≦ RL ≦ L2. However, the present invention is not limited to this. Absent. As illustrated in the flowchart of FIG. 7, RL, L1, and L2 are compared by the control unit 400 (S9040), and when RL> L2, (RL−L2) is calculated and this value is displayed on the display 253. (S9042) (see FIG. 8A). That is, since the sound collector 200 is too far by (RL-L2), for example, “Please move closer by 10 cm” is displayed on the display 253. Further, this sound may be played from the speaker 251. If RL <L1, (L1-RL) may be calculated and displayed on the display 253 (S9041) (see FIG. 8B). That is, since the sound collector 200 is too close by (L1-RL), for example, “Please move away by another 20 cm” is displayed on the display 253. Further, this sound may be played from the speaker 251. In this way, the operator can arrange the sound collector 200 easily and accurately.

=== Non-contact diagnostic system with high accuracy and efficiency ===
According to the non-contact diagnosis system 10 of the present embodiment, prior to diagnosis, the operator brings the sound collector 200 close to the diagnosis target location according to the guidance displayed on the display 253, and signals the sound from the speaker 251 as a signal. By simply pressing the measurement switch 255, sound information can always be automatically acquired at a suitable reference distance SL. Further, since the reference distance SL is automatically acquired from the device ID and the device data, the operator can save time and effort to check the reference distance SL. Furthermore, since the actual distance RL is automatically measured by the laser distance meter 210, the operator can arrange the sound collector 200 with respect to the diagnosis target location with higher accuracy. Therefore, highly accurate and efficient diagnosis can be performed.

  Further, according to the non-contact diagnosis system 10 of the present embodiment, the sampling frequency, the sampling time, the amplification factor, and the frequency band specific to the diagnosis target location are automatically acquired from the device data. Therefore, it is possible to save the labor for the operator to examine these, and to acquire the sound information under suitable conditions for the change to be reflected in the change of the sound information for each diagnosis target portion.

=== Other Embodiments ===
The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention is changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the embodiment described above, when the actual distance RL and the reference distance SL (L1, L2) are compared in step S904, the condition of L1 ≦ RL ≦ L2 is used. However, the present invention is not limited to this. For example, a condition of only RL ≦ L2 or a condition of only RL = L2 may be used.

  In the above-described embodiment, only the device ID is stored in the memory 110 of the wireless IC tag 100. However, the present invention is not limited to this. For example, the reference distance SL, the measurement procedure, etc. (specific information) ) May be stored.

  In the above-described embodiment, in step S905 and step S906, the worker is notified that the measurement is suitable and the sound information is acquired after waiting for the worker's response. However, the present invention is not limited to this. For example, sound information may be automatically acquired without such notification.

  In the above-described embodiment, the notification is performed by the speaker 251. However, the notification is not limited thereto. For example, the notification is appropriately displayed on the display 253 (determination display unit), or is vibrated by an appropriate vibrator. Or may be notified (vibration generator).

  In the above-described embodiment, the guidance for the worker is displayed on the display 253 in step S902. However, the present invention is not limited to this. For example, notification may be made by voice (sound generation unit).

  In the above-described embodiment, the device ID is stored in advance in the wireless IC tag 100 and read out. However, the present invention is not limited to this. For example, it may have an infrared data communication function such as IrDA, short-range wireless communication, and a memory for storing a device ID. In this case, the reader 230 of the sound collector 200 is replaced with an appropriate means for receiving infrared data.

  In the embodiment described above, the actual distance RL is measured by the laser distance meter 210, but the present invention is not limited to this. For example, an infrared distance sensor or a laser pointer may be used. In addition, when using an infrared distance sensor, an infrared source can also be used for the infrared data communication.

  In the above-described embodiment, one computer 300 diagnoses one entire power facility, but the present invention is not limited to this. For example, a plurality of computers may be connected through an information communication network, share one acoustic database 310, and each computer may diagnose each device group in one power facility. Or it is a system which diagnoses a some electric power installation, Comprising: A some computer may be connected through an information communication network, and each computer may each diagnose each electric power installation.

It is a block diagram which shows the structural example of the non-contact diagnostic system of this Embodiment. It is a block diagram which shows the structural example of the sound collector of this Embodiment. (A) is a chart which shows an example of the apparatus data of this Embodiment, (b) is a chart which shows an example of the acoustic time series data of this Embodiment, (c) is this chart It is a chart which shows an example which accumulate | stores the time series data of the several measurement date of a form, and is preserve | saved. It is a flowchart which shows the example of an operation | movement procedure of the control part when the sound collector of this Embodiment acquires sound information. It is a schematic diagram which shows the example of a display of the measurement procedure on the display of the sound collector of this Embodiment. (A) is a schematic diagram which shows the example of a display of the diagnostic result on the display of the sound collector of this Embodiment, (b) is the trend graph on the display of the sound collector of this Embodiment. (C) is a schematic diagram which shows the example of a display of the inspection order on the display of the sound collector of this Embodiment. It is another flowchart which shows the example of an operation | movement procedure of the control part when the sound collector of this Embodiment acquires sound information. It is a schematic diagram which shows the example of a display on the display of the sound collector of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Non-contact diagnostic system 100 Wireless IC tag 110 Memory 200 Sound collector 210 Laser distance meter 220 Microphone 230 Reader 240 Parabolic shape part 250 Main body part 251 Speaker 253 Display 255 Measurement switch 300 Computer 310 Acoustic database 350 Communication means 400 Control part 500 Sound Mechanism 510 Amplifier 520 Filter 530 A / D converter 600 Input / output panel 700 ROM
800 RAM

Claims (27)

A sound information acquisition system for acquiring sound information generated by the diagnosis target in order to diagnose normality or abnormality of the diagnosis target,
A storage device that is provided corresponding to each diagnosis object, and that stores unique information about each diagnosis object in advance;
A unique information reading unit that reads out the unique information from the storage device corresponding to the diagnosis target, and a reference distance from the diagnosis target when obtaining sound information generated by the diagnosis target is used as specific information about the diagnosis target. A reference distance acquisition unit that is acquired based on the actual distance, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and detects a sound signal from the diagnosis target A sound signal detection unit, an output unit that outputs a comparison result when the comparison unit compares that the actual distance is equal to or less than the reference distance, and a comparison result that the actual distance is equal to or less than the reference distance Is output from the output unit, a sound information acquisition unit capable of acquiring the sound signal detected by the sound signal detection unit as sound information for diagnosis, and a movable sound information acquisition device,
A sound information acquisition system comprising: A sound information acquisition system for acquiring sound information generated by the diagnosis target in order to diagnose normality or abnormality of the diagnosis target,
A storage device that is provided corresponding to each diagnosis object, and that stores unique information about each diagnosis object in advance;
A unique information reading unit that reads out the unique information from the storage device corresponding to the diagnosis target, and a reference distance from the diagnosis target when obtaining sound information generated by the diagnosis target is used as specific information about the diagnosis target. A reference distance acquisition unit that is acquired based on the actual distance, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and detects a sound signal from the diagnosis target A sound information acquisition unit that acquires, as diagnostic sound information, a sound signal detected by the sound signal detection unit when the comparison is made by the comparison unit that the actual distance is equal to or less than the reference distance And a movable sound information acquisition device comprising:
A sound information acquisition system comprising:   The sound information acquisition system according to claim 1, wherein the specific information is information indicating the reference distance between a corresponding diagnosis target and the sound information acquisition device. The unique information is ID information for identifying a corresponding diagnosis target,
The sound information acquisition device further includes, for each diagnosis target, a distance storage unit in which the ID information and the reference distance for acquiring sound information generated by the diagnosis target are associated in advance.
The sound information acquisition system according to claim 1 or 2.   The output unit includes at least one of a sound generation unit that generates sound as the comparison result, a determination display unit that displays the comparison result, and a vibration generation unit that generates vibration as the comparison result. The sound information acquisition system according to claim 1. The specific information further includes information indicating a measurement procedure of sound information generated by the corresponding diagnosis target,
The sound information acquisition apparatus further includes a measurement guide unit that performs measurement guidance based on information indicating a measurement procedure of sound information generated by the diagnosis target.
The sound information acquisition system according to claim 1, wherein the sound information acquisition system is a sound information acquisition system. The sound information acquisition device includes:
For each diagnostic object, a measurement procedure storage unit storing information indicating a measurement procedure of sound information generated by the diagnostic object,
A measurement guide unit that performs measurement guidance based on information indicating a measurement procedure of sound information generated by the corresponding diagnosis target, which is read out from the measurement procedure storage unit based on the unique information,
The sound information acquisition system according to claim 1, wherein the sound information acquisition system is a sound information acquisition system.   The sound information acquisition system according to claim 6 or 7, wherein the measurement guide unit performs measurement guide by voice from a sound generation unit.   The sound information acquisition system according to claim 6 or 7, wherein the measurement guidance unit performs measurement guidance by a guidance display unit that displays the measurement procedure.   The sound information acquisition system according to claim 1, wherein the sound information acquisition device is a parabolic sound collector. The sound information acquisition device includes:
For each diagnostic object, it further has a collection time storage unit that stores information indicating the time to collect sound information generated by the diagnostic object,
The sound signal detector is
Detecting a sound signal generated by the diagnosis target based on information indicating a sampling time of sound information generated by the corresponding diagnosis target, read from the sampling time storage unit based on the unique information;
The sound information acquisition system according to any one of claims 1 to 10. The sound information acquisition device includes:
For each diagnostic object, it further includes an amplification factor storage unit that stores information indicating the amplification factor of sound information generated by the diagnostic object,
The sound signal detector is
Detecting a sound signal generated by the diagnostic target based on information indicating the amplification factor of the sound information generated by the corresponding diagnostic target read out from the amplification factor storage unit based on the specific information;
The sound information acquisition system according to any one of claims 1 to 11.   The sound information acquisition system according to any one of claims 1 to 12, wherein the sound information acquisition device further includes a filter unit that extracts a predetermined frequency component of sound information generated by the diagnosis target.   The filter unit includes a first filter that extracts a frequency component equal to or lower than a first frequency, and a second filter that extracts a frequency component equal to or higher than a second frequency lower than the first frequency. The sound information acquisition system according to claim 13. The sound information acquisition device includes:
For each diagnosis object, it further has a frequency storage unit that stores information indicating the frequency to be extracted in the sound information generated by the diagnosis object,
The filter unit is
The characteristic is set according to the information indicating the frequency to be extracted in the sound information generated from the diagnosis target, which is read based on the unique information from the frequency storage unit.
The sound information acquisition system according to claim 13 or 14, The storage device is a wireless IC tag;
The unique information reading unit is a reader of the wireless IC tag.
The sound information acquisition system according to claim 1, wherein the sound information acquisition system is a sound information acquisition system.   16. The sound information acquisition system according to claim 1, wherein the unique information reading unit reads the unique information from the storage device based on an infrared data communication method.   The sound information acquisition system according to claim 1, wherein the actual distance measurement unit includes an infrared distance sensor or a laser pointer.   The sound information acquisition system according to claim 1, wherein the actual distance measurement unit is a laser distance meter. A movable sound information acquisition device used in a non-contact diagnostic system for acquiring sound information generated by a diagnosis target and diagnosing normality or abnormality of the diagnosis target based on the sound information,
A unique information reading unit for reading unique information about the diagnosis target from an external storage means;
A reference distance acquisition unit that acquires a reference distance from the diagnosis target when acquiring sound information generated by the diagnosis target based on unique information about the diagnosis target;
An actual distance measuring unit for measuring an actual distance from the diagnosis target;
A comparison unit for comparing the actual distance and the reference distance;
A sound signal detector for detecting a sound signal from the diagnosis target;
An output unit that outputs a comparison result when the comparison is performed by the comparison unit as the actual distance is equal to or less than the reference distance;
A sound information acquisition unit capable of acquiring a sound signal detected by the sound signal detection unit as diagnostic sound information when a comparison result indicating that the actual distance is equal to or less than the reference distance is output from the output unit. When,
A sound information acquisition apparatus comprising: A movable sound information acquisition device used in a non-contact diagnostic system for acquiring sound information generated by a diagnosis target and diagnosing normality or abnormality of the diagnosis target based on the sound information,
A unique information reading unit for reading unique information about the diagnosis target from an external storage means;
A reference distance acquisition unit that acquires a reference distance from the diagnosis target when acquiring sound information generated by the diagnosis target based on unique information about the diagnosis target;
An actual distance measuring unit for measuring an actual distance from the diagnosis target;
A comparison unit for comparing the actual distance and the reference distance;
A sound signal detector for detecting a sound signal from the diagnosis target;
A sound information acquisition unit that acquires a sound signal detected by the sound signal detection unit as diagnostic sound information when the actual distance is equal to or less than the reference distance by the comparison unit;
A sound information acquisition apparatus comprising: A non-contact diagnostic system that obtains sound information generated by a diagnosis target and diagnoses normality or abnormality of the diagnosis target based on the sound information,
A storage device that is provided corresponding to each diagnosis object, and that stores unique information about each diagnosis object in advance;
A unique information reading unit that reads out the unique information from the storage device corresponding to the diagnosis target, and a reference distance from the diagnosis target when obtaining sound information generated by the diagnosis target is used as specific information about the diagnosis target. A reference distance acquisition unit that is acquired based on the actual distance, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and detects a sound signal from the diagnosis target A sound signal detection unit, an output unit that outputs a comparison result when the comparison unit compares that the actual distance is equal to or less than the reference distance, and a comparison result that the actual distance is equal to or less than the reference distance Is output from the output unit, a sound information acquisition unit capable of acquiring the sound signal detected by the sound signal detection unit as sound information for diagnosis, and a movable sound information acquisition device,
For each diagnosis target, a sound information database that stores sound information acquired by the sound information acquisition device and information indicating the acquisition time in association with each other, and the unique information from the sound information database for performing the diagnosis An information processing device connected to the sound information acquisition device, comprising: an analysis unit that analyzes sound information that is read based on information and that is generated by a corresponding diagnosis target at a predetermined acquisition time;
A non-contact diagnostic system characterized by comprising: A non-contact diagnostic system that obtains sound information generated by a diagnosis target and diagnoses normality or abnormality of the diagnosis target based on the sound information,
A storage device that is provided corresponding to each diagnosis object, and that stores unique information about each diagnosis object in advance;
A unique information reading unit that reads out the unique information from the storage device corresponding to the diagnosis target, and a reference distance from the diagnosis target when obtaining sound information generated by the diagnosis target is used as specific information about the diagnosis target. A reference distance acquisition unit that is acquired based on the actual distance, a real distance measurement unit that measures an actual distance from the diagnosis target, a comparison unit that compares the actual distance and the reference distance, and detects a sound signal from the diagnosis target A sound information acquisition unit that acquires, as diagnostic sound information, a sound signal detected by the sound signal detection unit when the comparison is made by the comparison unit that the actual distance is equal to or less than the reference distance And a movable sound information acquisition device comprising:
For each diagnosis target, a sound information database that stores sound information acquired by the sound information acquisition device and information indicating the acquisition time in association with each other, and the unique information from the sound information database for performing the diagnosis An information processing device connected to the sound information acquisition device, comprising: an analysis unit that analyzes sound information that is read based on information and that is generated by a corresponding diagnosis target at a predetermined acquisition time;
A non-contact diagnostic system characterized by comprising:   The non-contact diagnosis system according to claim 22 or 23, wherein the analysis unit performs time-series analysis of the sound information.   The non-contact diagnosis system according to any one of claims 22 to 24, wherein the analysis unit creates a trend graph of a diagnosis result.   The non-contact diagnostic system according to any one of claims 22 to 25, wherein the analysis unit uses one or more of wavelet analysis, fast Fourier transform, and inverse filter method. A non-contact diagnostic method for diagnosing normality or abnormality of the diagnosis object based on sound information generated by the sound information acquisition apparatus and generated by the diagnosis object,
A unique information reading step of reading unique information about the diagnosis target from the external storage means;
A reference distance acquisition step of acquiring a reference distance between the diagnosis object and the sound information acquisition device when acquiring sound information generated by the diagnosis object based on unique information about the diagnosis object;
A comparison step of comparing the actual distance measured between the diagnostic object and the sound information acquisition device with the reference distance;
A sound information acquisition step of acquiring the sound information when the comparison is made in the comparison step that the actual distance is equal to or less than the reference distance;
A diagnosis step of executing the diagnosis based on the sound information acquired in the sound information acquisition step;
A non-contact diagnostic method comprising:

Images