JP7397714B2 - Sound collection auxiliary device and sound collection method - Google Patents

Description

Embodiments of the present invention relate to a sound collection auxiliary device and a sound collection method.

For example, noise from industrial electric motors originates from the motor itself or from locations related to the motor body. Noise sources include, for example, mechanical noise generated in the rotating shaft of the electric motor, a gearbox connected to the rotating shaft, a pump connected to the gearbox, and electromagnetic noise generated in the winding coils of the electric motor when the electric motor is driven. The applicant has proposed a device that records sounds generated in an electric motor or a location related to the aforementioned electric motor, and diagnoses an abnormality based on the recorded sound information (for example, see Patent Document 1).

JP 2019-95152 Publication Special table 2016-540240 publication

Industrial electric motors deteriorate over time as the operating time passes. For example, bearings that support the rotor of an electric motor deteriorate as the rotor rotates. As bearing deterioration progresses, abnormal vibrations occur and abnormal noise is generated. Maintenance workers regularly inspect electric motors. For this reason, for example, by measuring the sound generated around the motor during periodic inspections and comparing the measured sound information in chronological order, it is possible to determine whether abnormal noise is occurring due to deterioration over time. .

However, for example, if the installation environment of the sound collection section changes each time an inspection is performed, it is not possible to acquire the surrounding sounds of the electric motor with good reproducibility. In addition, in cases where the sound collection directionality of the sound collection section is strong in one direction, reproducibility will be improved unless the direction of the sound collection section with strong sound collection direction is directed toward the sound source to be measured each time when collecting sound. can not get. Furthermore, an acoustic collector that collects sound using a mobile terminal has been proposed (see, for example, Patent Document 2). However, even if the acoustic collector described in Patent Document 2 is applied as a device for collecting noise, it is not possible to determine which target device the sound is being collected from, and the noise of a specific target device cannot be acquired with good reproducibility. .

The present invention has been made in view of the above problems, and its purpose is to provide a sound collection auxiliary device that makes it possible to obtain noise generated in a specific target device with good reproducibility, and a sound collection device that uses the sound collection auxiliary device. is to provide a sound method.

The sound collection auxiliary device according to one aspect of the present embodiment includes an imaging unit that captures an image in a predetermined imaging direction, a display unit that displays the captured image by the imaging unit, and a sound collection port that collects surrounding sounds. an engaging portion that is configured to be attachable to a mobile terminal equipped with the device and that is engaged so as to be attachable to the mobile terminal; a communication hole that passes through to a sound collection port and collects sounds around the target device; and a mobile terminal. When the is positioned on the engaging part, the display unit points to a partial area of the display screen while being displayed on the display screen as a guide to strengthen the sound collection directionality through the communication hole, and identifies the area to be pointed to. and a pointing device that can be placed so as to overlap with the target device .

Electrical configuration diagram schematically showing the noise diagnosis device according to the first embodiment An explanatory diagram of the display mode of the display unit according to the first embodiment A side view schematically showing an installation example of the sound collection auxiliary device according to the first embodiment A bottom view showing an aspect of the sound collection hole of the mobile terminal according to the first embodiment A rear view schematically showing an installation example of the sound collection auxiliary device according to the first embodiment Examples of images and acoustic signal waveforms captured on a display screen of a specific target device according to the first embodiment Flowchart schematically explaining the flow of processing according to the first embodiment A side view schematically showing an installation example of the sound collection auxiliary device according to the second embodiment A side view schematically showing an installation example of the sound collection auxiliary device according to the third embodiment Part 1 of an explanatory diagram schematically showing a usage example of the sound collection auxiliary device according to the fourth embodiment Part 2 of an explanatory diagram schematically showing an example of use of the sound collection auxiliary device according to the fourth embodiment Part 1 of a rear view schematically showing the installation mode of the sound collection auxiliary device according to the fifth embodiment Part 2 of a rear view schematically showing the installation mode of the sound collection auxiliary device according to the fifth embodiment A side view schematically showing the installation mode of the sound collection auxiliary device according to the fifth embodiment A rear view schematically showing the installation mode of the sound collection auxiliary device according to the sixth embodiment A side view schematically showing the installation mode of the sound collection auxiliary device according to the sixth embodiment A rear view schematically showing the installation mode of the sound collection auxiliary device and the indicating device according to the seventh embodiment A side view schematically showing an installation mode of a sound collection auxiliary device and an indicator according to a seventh embodiment An explanatory diagram of the display mode of the display unit according to the seventh embodiment

Hereinafter, some embodiments of a sound collection auxiliary device and a sound collection method will be described based on the drawings. In the following description, similar parts are given the same reference numerals (for example, the tens and ones digits are the same reference numerals), and the explanation will be omitted.

First, the electrical building blocks will be explained. A noise diagnostic device 1 shown in FIG. 1 constitutes a diagnostic device or a diagnostic system that diagnoses noise generated from an electric motor 2 or a part related to the electric motor 2, such as a target device 20 such as a bearing 2a, a gear box 2b, or a pump 2c. . The noise diagnosis device 1 is configured using a mobile terminal 3. The noise is caused by, for example, mechanical noise generated in the bearing 2a of the rotating shaft of the electric motor 2, the gearbox 2b connected to the rotating shaft, the pump 2c connected to the gearbox 2b, or electromagnetic noise generated electromagnetically when the electric motor 2 is driven. .

The mobile terminal 3 is constituted by, for example, a smartphone, a tablet, or a notebook computer, and is carried and operated by the worker who uses the target device 20.

The mobile terminal 3 includes a processing section 4, a storage section 5, a display section 6, an operation section 7, an imaging section 8, a sound collection section 9, and a communication section (not shown). The communication unit is capable of communicating with the control device through an external network, for example, and includes wired communication such as wired LAN, wireless LAN, wireless communication unit such as WiFi (registered trademark), Bluetooth (registered trademark), etc. According to the Near Field Communication Department, etc. The storage unit 5 stores application programs processed by the processing unit 4. Part or all of the processing executed by each of the functional units 4 to 9 including the processing unit 4 is realized by a processor such as a CPU (Central Processing Unit) executing a program stored in the storage unit 5. Ru.

The storage unit 5 also stores data captured by the imaging unit 8 and data collected by the sound collection unit 9. The storage unit 5 also stores data processed by the processing unit 4. The storage unit 5 also stores parameters related to the target device 20 (for example, the bearing pass frequency for the bearing 2a, the meshing frequency for the gearbox 2b, the blade cutting frequency for the pump 2c, etc.).

As illustrated in FIG. 2, the mobile terminal 3 includes a display screen 6a of the display unit 6 on the front side. The display unit 6 is a display device such as a liquid crystal display or an organic EL (Electro Luminescence) display.

The imaging unit 8 is configured using a built-in camera that can capture images such as still images or moving images. As illustrated in FIG. 3, the imaging unit 8 has a camera lens 8a installed on a part of the back side of the mobile terminal 3, and is configured so that the back side of the mobile terminal 3 is the imaging direction. The display unit 6 is capable of displaying images captured by the imaging unit 8 on a display screen 6a in real time.

For example, the camera lens 8a illustrated in FIG. 3 is installed in a part of the upper back surface of the mobile terminal 3. The mobile terminal 3 may be equipped with an external camera lens (not shown) separate from the built-in camera lens 8a. The imaging section 8 outputs an image signal captured through the camera lens 8a to the processing section 4. The operator can change the imaging direction by the imaging unit 8 by manipulating the position and angle of the housing of the mobile terminal 3. When the operator changes the imaging direction by the imaging unit 8 by manipulating the position and angle of the housing of the mobile terminal 3, the display screen 6a of the display unit 6 is also changed to match this imaging area.

As illustrated in FIG. 4, the sound collection unit 9 includes at least one sound collection port 9a in appearance for collecting surrounding sounds, and also includes a microphone (not shown) inside the sound collection port 9a. Be prepared. The sound collection section 9 outputs the acoustic signal acquired by the microphone to the processing section 4. The sound collection section 9 is installed so as to have a predetermined sound collection directivity using a microphone and a sound collection port 9a.

For example, when a worker carries the mobile terminal 3 and uses it as a telephone, the sound collection directivity of the sound collection section 9 is adjusted to be stronger in the direction in which the worker speaks. Therefore, by manipulating the position and angle of the casing of the mobile terminal 3, the user can change the sound collection direction by the sound collection unit 9 and the direction in which the sound collection directivity is strengthened.

The operation unit 7 illustrated in FIG. 1 is configured by a push button 7a (see FIGS. 2 and 6) that receives a pressing operation and a touch panel. The touch panel is configured to be superimposed on the display screen 6a of the display unit 6. The display unit 6 can perform various operations by an operator touching the display screen 6a with a finger, a pen, or the like. When the operator inputs an operation to the operation section 7, the display section 6 changes the display information displayed on the display screen 6a based on this operation input information.

The processing section 4 has functions as a signal processing section 10, an image processing section 11, a comparison section 12, and a diagnosis section 13. The signal processing section 10 stores the image signal from the imaging section 8 in the storage section 5, receives the analog acoustic signal from the sound collection section 9, converts it into digital, and stores it in the storage section 5. The image processing section 11 performs predetermined image processing on the image signal data stored in the storage section 5 to make the data displayable on the display section 6 .

The comparison unit 12 compares the data stored in the storage unit 5 based on a predetermined analysis method using preset analysis conditions. For example, the comparison unit 12 calculates a frequency spectrum by performing fast Fourier transform processing on the sound data collected by the sound collection unit 9, and calculates the frequency spectrum based on the reference sound level of a predetermined frequency band and the predetermined frequency band. and the level of the frequency spectrum obtained. The comparison unit 12 acquires from the storage unit 5 a reference sound level of a frequency band unique to the target device 20, such as the electric motor 2, bearing 2a, gearbox 2b, pump 2c, etc., and compares it with the calculated level.

The diagnosis section 13 diagnoses whether or not there is an abnormality in the target device 20 based on the comparison result by the comparison section 12 . As long as an operator can diagnose deterioration based on the comparison result by the comparing section 12, the function of the diagnosing section 13 may be omitted as necessary.

Note that when the operator operates the operation unit 7, an instruction is given to execute the application program stored in the storage unit 5. Then, as illustrated in FIG. 2, the image processing unit 11 of the mobile terminal 3 causes the display screen 6a of the display unit 6 to display an initial screen representing an area where the acoustic signal is displayed together with the captured image by the imaging unit 8. The display unit 6 can display the image captured by the imaging unit 8 in real time in the image display area R1, and can also display the acoustic signal collected by the sound collection unit 9 in real time in the acoustic signal display area R2. It has become.

Next, a structural example of the sound collection auxiliary device 30 will be explained. The sound collection auxiliary device 30 is attached to the mobile terminal 3 when deterioration diagnosis is performed. The sound collection auxiliary device 30 is provided auxiliary to amplify the sound collection signal of the sound collection section 9. The sound collection auxiliary device 30 illustrated in FIGS. 2, 3, and 5 includes a support member 31 as an engagement portion that is attachably engaged with the mobile terminal 3. The entire supporting member 31 is made of, for example, resin. The support member 31 is formed so as to have an L-shape as a whole in the side view illustrated in FIG. 3 .

The support member 31 has an L-shaped inner cross section formed into a rectangular frame shape, and has a communication hole 32 inside the rectangular frame. The support member 31 is configured to be attachable to the lower part 3a of the mobile terminal 3, and includes a vertically extending portion 33 extending from the upper end to the lower end of the L-shape, and a vertically extending portion 33 bent at a right angle at the lower end of the vertically extending portion 33. A horizontally extending portion 35 extends from the bent portion 34 in a predetermined direction (corresponding to the imaging direction).

The communication hole 32 is mainly configured along the direction in which the laterally extending portion 35 extends. The sound collection auxiliary device 30 is used when the open end of the communication hole 32 is directed toward the imaging direction of the imaging section 8 . Further, the horizontally extending portion 35 is located on the distal end side of the imaging section 8 in the imaging direction, and a pointing tool 36 is attached thereto. The pointing tool 36 mainly includes a rod-shaped portion 37, and a positioning mark 38 is provided at the top end of the rod-shaped portion 37. The positioning mark 38 is configured to have a shape (for example, an arrow shape) that indicates a partial area narrower than the imaging area of the imaging unit 8 or the display screen 6a of the display unit 6 or the center of the partial area as a target. Ru.

The longitudinally extending portion 33 of the support member 31 is configured to be able to hold the mobile terminal 3 inside its rectangular frame. When the support member 31 is attached to the mobile terminal 3, the communication hole 32 of the support member 31 is formed so as to communicate with the sound collection port 9a. The communication hole 32 is configured to cover the sound collection port 9a of the mobile terminal 3.

When the mobile terminal 3 is held inside the rectangular frame of the vertically extending portion 33, the pointing tool 36 is configured to be able to point in a predetermined pointing direction (in this embodiment, upward). The length of the rod-shaped portion 37 of the indicator 36 is adjusted according to the length of the horizontally extending portion 35 and the imaging angle (see the broken line in FIG. 3) by the camera lens 8a of the imaging section 8.

When the operator attaches the sound collection auxiliary device 30 to the mobile terminal 3 when performing a deterioration diagnosis of the target equipment 20, the pointing tool 36 points to a partial area in the three-dimensional space, as shown in FIG. . At this time, the imaging section 8 images the distal end side of the pointing tool 36 through the camera lens 8a, so that the imaging section 8 makes the distal end side of the pointing tool 36 part of the imaging region, as shown in FIG. The display unit 6 displays the tip side of the pointing tool 36 on a part of the display screen 6a, so that the operator can see that the pointing tool 36 is pointing to a partial area of the display screen 6a formed by the display unit 6. . This partial area is adjusted in advance so that when the mobile terminal 3 is positioned inside the rectangular frame of the vertically extending installation part 33, it is shown as a guideline for the area where the directivity of sound collection from the communication hole 32 is strengthened. ing.

The communication hole 32 shown in FIG. 3 passes through an opening inside the rectangular frame of the vertically extending portion 33 to the sound collection port 9a of the mobile terminal 3, and also communicates through an opening inside the rectangular frame of the horizontally extending portion 35. There is also a hole through the lens in the imaging direction. Therefore, the sound collection unit 9 can intensively collect sounds in the imaging direction, and the sound collection directivity can be improved.

Further, as shown in FIG. 2, a notch 33a is provided at a part of the upper end of the longitudinally extending portion 33 of the support member 31. The cutout portion 33a is provided to facilitate operation of the push button 7a of the operating section 7 of the mobile terminal 3 when the mobile terminal 3 is attached to the opening of the rectangular frame of the longitudinally extending portion 33. . Note that when performing a deterioration diagnosis of the target device 20 using the mobile terminal 3 that is not provided with the push button 7a, there is no need to operate the push button 7a, so the notch 33a is not provided in the support member 31. It's okay.

Next, a procedure for performing a deterioration diagnosis using the mobile terminal 3 will be explained. When performing a deterioration diagnosis using the operating sound of the operating target device 20, the measurement sound differs depending on the distance or angle between the mobile terminal 3 and the target device 20. For this reason, for example, when periodically diagnosing deterioration by comparing with the reference sound of the target device 20, the distance between the mobile terminal 3 and the target device 20 is kept constant, and the angle between the mobile terminal 3 and the target device 20 is set to be reproducible. It is desirable to keep it well maintained.

When the operator starts measurement by operating the operation unit 7 and images the target device 20 with the imaging unit 8, the display unit 6 displays the target device 20 on the display screen 6a, as illustrated in FIG. At this time, the imaging section 8 is imaging the positioning mark 38 on the tip side of the pointing tool 36, and the display section 6 also displays the designated area of the pointing tool 36 imaged by the imaging section 8 on the display screen 6a. The pointing tool 36 points to a partial area of the display screen 6a of the display unit 6. This partial area is displayed as a guideline for a location where the directivity of sound collection from the communication hole 32 is to be strengthened.

Therefore, as shown in the flowchart in FIG. 7, the operator aligns the positioning mark 38 at the tip of the indicator 36 with the specific target device 20 (bearing 2a in FIG. 6) (S1 in FIG. 7). By collecting sound with the sound collection unit 9 while imaging with the imaging unit 8 (S2 in FIG. 7), it is possible to intensively collect sounds emitted from the bearing 2a, which is the specific target device 20.

The signal processing section 10 receives the acoustic signal from the sound collection section 9, converts it into digital data, and stores it in the storage section 5. The signal processing unit 10 analyzes the magnitude and waveform of the sound collected by the sound collection unit 9, and the image processing unit 11 displays a sound waveform image Z on the display screen 6a as illustrated in FIG. The operator then moves the positioning mark 38 on the tip of the indicator 36 to the specific target device 20 (for example, the bearing 2a) while visually checking the magnitude of the surrounding sound when the specific target device 20 is operating. ) can be adjusted. Further, the worker can confirm the waveform image Z of the sound emitted from the bearing 2a of the specific target device 20 almost in real time.

Thereafter, when an operation instruction for storing images and sounds is given by the operator's operation on the operation unit 7, the signal processing unit 10 processes the image signal from the imaging unit 8, the acoustic signal from the sound collection unit 9, and the storage unit 5. to be memorized. Note that the signal processing section 10 may continue to store the image signal and the acoustic signal in the storage section 5 from the timing when the measurement is started.

Then, the comparison unit 12 compares the reference sound level of the predetermined frequency band of the acoustic signal stored in the storage unit 5 and the level of the frequency spectrum calculated in the predetermined frequency band (S3 in FIG. 7). Thereby, the diagnostic unit 13 can diagnose the difference between the frequency band and the reference sound level that occurs uniquely in the target device 20 (S4 in FIG. 7). The diagnosis section 13 stores the diagnosis results in the storage section 5.

As explained above, according to the sound collection auxiliary device 30 according to the present embodiment, the communication hole 32 is attached to the mobile terminal 3 so as to be attachable thereto, and the communication hole 32 is connected to the mobile terminal 3 so as to reach the sound collection port 9a of the mobile terminal 3. has been established. The pointing tool 36 is displayed on the display screen 6a of the display unit 6 and points to a partial area of the display screen 6a. This partial area is provided as a guide for a location where the directivity of sound collection from the communication hole 32 is to be strengthened. Therefore, the noise of the specific target device 20 (for example, the bearing 2a) can be acquired with good reproducibility.

(Second embodiment)
FIG. 8 shows a second embodiment. As illustrated in FIG. 8, the sound collection auxiliary device 230 includes a sound collection base member 231 as an engaging portion, and a wide-angle sound collection adapter 240 attached to the distal end side of the sound collection base member 231. The sound collector 231 has an L-shape in the cross section shown in FIG. 8, and is configured to be attachable to the lower part 3a of the mobile terminal 3.

The sound collector 231 has a vertically extending portion 233 having a rectangular frame shape in cross section and extending from the upper end to the lower end of the L-shape, and a vertically extending portion 233 bent at a right angle at the lower end of the vertically extending portion 233. It includes a bent portion 234 and a laterally extending portion 235 extending from the bent portion 234 in a predetermined direction (the imaging direction of the imaging unit 8). The sound collecting base member 231 is provided with a communication hole 232 inside thereof that communicates from the longitudinally extending portion 233 to the bent portion 234 and the laterally extending portion 235 . The communication hole 232 is bent and communicates with the imaging direction of the imaging section 8 .

The wide-angle sound collection adapter 240 is divided into a base end 241 and a distal end 242. The outer diameter of the proximal end 241 of the wide-angle sound collecting adapter 240 is molded to the same diameter, and the outer diameter of the tip end 242 of the wide-angle sound collecting adapter 240 is molded to a wide angle toward the tip. The wide-angle sound collection adapter 240 has a communication hole 243 inside thereof from the base end 241 to the distal end 242. The diameter of the communication hole 243 of the base end 241 is formed to be relatively small, and the diameter of the communication hole 243 gradually increases from the middle between the base end 241 and the distal end 242 to the most distal end of the distal end 242. It is shaped to be. The base end 241 of the wide-angle sound collecting adapter 240 is configured to be able to be attached to a part of the sound collecting base 231 while covering a part of the distal end side of the horizontally extending part 235 of the sound collecting base 231.

Further, when the wide-angle sound collection adapter 240 is attached to the sound collection base 231, the communication hole 232 of the sound collection base 231 and the communication hole 243 of the wide-angle sound collection adapter 240 are configured to communicate with each other. Therefore, when the sound collection base 231 is attached to the mobile terminal 3 and the wide-angle sound collection adapter 240 is attached to the sound collection base 231, all the communication holes 232 and 243 will communicate with each other. Therefore, the sound coming from the imaging direction of the imaging unit 8 can be collected into the sound collection port 9a through the communication holes 243 and 232. The wide-angle sound collection adapter 240 may have an inner surface forming the communication hole 243 of the tip portion 242 formed into a parabolic curved surface.

Further, a pointing device 36 is attached to the tip side of the wide-angle sound collection adapter 240. The pointing tool 36 has a positioning mark 38 at its tip, and has the same configuration as the first embodiment.

When the mobile terminal 3 is engaged with and held inside the rectangular frame of the vertically extending portion 233 of the sound collection base 231 and the wide-angle sound collection adapter 240 is attached to the sound collection base 231, the indicator 36 points in a predetermined pointing direction (in this embodiment, upward). The length of the pointing device 36 depends on the length of the horizontally extending portion 235, the shape and size of each part of the wide-angle sound collection adapter 240, the size of the pointing device 36, and the imaging angle by the camera lens 8a of the imaging section 8 (Fig. 8)).

Thereby, when the sound collection auxiliary device 230 is attached to the mobile terminal 3 when the operator performs a deterioration diagnosis, the pointing tool 36 points to a specific three-dimensional spatial region. By imaging the distal end side of the pointing tool 36 by the imaging section 8, the imaging section 8 makes the positioning mark 38 on the distal end side of the pointing tool 36 a part of the imaging region. By displaying the positioning mark 38 on the tip side of the pointing tool 36 on a part of the display screen 6a on the display section 6, the operator can see that the pointing tool 36 points to a specific area on the display screen 6a of the display section 6. It looks like it is. Therefore, the same effects as in the first embodiment are achieved.

Further, the communication hole 243 of the wide-angle sound collection adapter 240 passes through the communication hole 232 of the sound collection base 231 to the sound collection port 9a of the mobile terminal 3, and thus opens toward the imaging direction. Therefore, the sound collection unit 9 can intensively collect sounds in the imaging direction, and the sound collection directivity can be improved, producing the same effects as in the first embodiment. In addition, the wide-angle sound collection adapter 240 is shaped so that the diameter gradually increases from the middle between the base end 241 and the distal end 242 to the most distal side, so that it can collect sounds in a wider range.

(Third embodiment)
FIG. 9 shows a third embodiment. The sound collection auxiliary device 330 illustrated in FIG. 9 includes a wide-angle sound collection member 331 as an engagement portion in which a communication hole 332 is formed at a wide angle from the sound collection port 9a of the mobile terminal 3 toward the imaging direction. Specifically, the sound collection auxiliary device 330 includes a vertically extending section 333, a bent section 334, a horizontally extending section 335, and a wide-angle sound collecting section 342. The sound collection auxiliary device 330 is configured to have an L-shape in the cross section shown in FIG.

The longitudinally extending portion 333 has a rectangular frame shape in cross section and extends from the upper end to the lower end. Further, the bent portion 334 is bent at a right angle at the lower end of the longitudinally extending portion 333 . The horizontally extending portion 335 extends from the bent portion 334 in a predetermined direction (the imaging direction of the imaging unit 8). The outer shape of the wide-angle sound collecting section 342 is formed so that the diameter gradually increases from the base end toward the distal end side in a predetermined direction.

The longitudinally extending portion 333, the bent portion 334, the laterally extending portion 335, and the wide-angle sound collecting portion 342 are provided with a communication hole 332 that communicates the inside thereof. The communication hole 332 is formed so that its diameter gradually increases from the base end of the wide-angle sound collecting section 342 toward the distal end side in a predetermined direction. Therefore, the aspect of this embodiment also has the same effects as the second embodiment.

The sound collection auxiliary device 30 is constituted by a wide-angle sound collection member 331 that integrally includes a longitudinally extending portion 333, a bent portion 334, a laterally extending portion 335, and a wide-angle sound collecting portion 342. Therefore, compared to the structure of the second embodiment, it is possible to reduce misalignment when the device is attached to the mobile terminal 3, and the operator can direct the area pointed by the indicator 36 to a specific target device 20 (for example, the bearing 2a). Easier to match.

(Fourth embodiment)
10 and 11 show a fourth embodiment. As shown in an example of use in FIG. 10, the mobile terminal 3 may be attached to a portable rod-shaped holder 450, and the sound collection auxiliary device 30 may be attached to the portable terminal 3 so as to be operable.

The holder 450 is mainly composed of a rod-shaped portion 451. The holder 450 includes a grip portion 452 at the base end of a rod-like portion 451 that can be gripped by an operator, and a gripping tool 453 for gripping the mobile terminal 3 at the tip of the rod-like portion 451. The clamping tool 453 has a spring (not shown) built therein, and is configured to be able to clamp and clamp the mobile terminal 3 in the width direction.

Although not shown, the mobile terminal 3 of this embodiment includes a short-range communication unit using, for example, Bluetooth (registered trademark) short-range communication technology. The mobile terminal 3 is configured to be communicatively connectable with a remote control 454 that can be carried and operated by an operator using a short-range communication unit. The remote control 454 is equipped with a push button switch and a communication function. When the operator operates a push button switch on the remote controller 454, the remote controller 454 establishes communication with the mobile terminal 3 and instructs the mobile terminal 3 to take an image and collect sound. Thereby, the mobile terminal 3 can image the target device 20 using the imaging unit 8 through the camera lens 8a. At this time, the sound collection unit 9 can collect noise emitted from a specific target device 20 (for example, the bearing 2a).

As illustrated in FIG. 10, if the holder 450 holds the mobile terminal 3 at the tip of the rod-shaped portion 451, an image of the target device 20 can be captured from a position extended by the length of the rod-shaped portion 451, Sound can now be collected based on that position. Therefore, by allowing the worker to take a picture while visually checking the display screen 6a of the display unit 6, it is possible to take an image and collect sound even in a place where it is impossible to take an image or collect sound in normal operation, thereby improving convenience for the worker.

Further, as illustrated in FIG. 11, a tripod 460 may be used. The tripod 460 includes a rod-shaped portion 461, three legs 462 attached to one end of the rod-shaped portion 461, and a clamping tool 453 attached to the other end of the rod-shaped portion 461. The mobile terminal 3 may be attached to the clamping tool 453 of the tripod 460 for fixing the imaging position and the sound collection position, and the sound collection auxiliary device 30 may be attached to the mobile terminal 3 for use. As a result, the imaging location and the sound collection location can be fixed, the noise of the specific target device 20 can be acquired with better reproducibility, and the same effects as in the embodiment described above can be achieved.

(Fifth embodiment)
12 to 14 show a fifth embodiment. As illustrated in FIGS. 12 to 14, the specific three-dimensional spatial region pointed to by the pointing tool 536 may be configured to be changeable depending on the installation position of the camera lens 8a of the imaging unit 8. The indicator 536 includes a rod-shaped portion 537 and a positioning mark 538 attached to the tip of the rod-shaped portion 537.

In the mobile terminal 3, the installation position of the camera lens 8a may vary depending on the model of the mobile terminal 3. For example, as illustrated in FIG. 12, the camera lens 8a may be installed on the right side of the back of the mobile terminal 3, or as illustrated in FIG. 13, the camera lens 508a may be installed on the left side of the back of the mobile terminal 3. be. At this time, it is desirable that the three-dimensional space pointed to by the positioning mark 538 at the tip of the pointing tool 536 can be changed depending on the installation position of the camera lenses 8a, 508a of the mobile terminal 3. Then, the space in which the display unit 6 displays the positioning mark 538 on the display screen 6a is prevented from moving as much as possible, and the partial area pointed by the indicator 536 can be adjusted in accordance with the sound collection directivity of the sound collection unit 9. Note that, as shown in FIG. 14, when both the examples shown in FIG. 12 and FIG. can be included.

In this embodiment, the length of the pointing tool 536 is longer than that of the pointing tool 36 of the previous embodiment. Therefore, the shape of the support member 531 is different from that of the support member 31. As illustrated in FIG. 14, the support member 531 includes a longitudinally extending portion 33, a bent portion 34, and a laterally extending portion 535. Since the structure of the support member 531 is different from the structure of the support member 31, the length of the laterally extending portion 535 is adjusted to be shorter than the laterally extending portion 35. The horizontally extending portion 535 includes a communication hole 532 extending in a predetermined direction therein. The communication hole 532 is formed to have a wide angle in a predetermined direction from the base end portion. Therefore, noise in a predetermined direction can be widely collected.

(Sixth embodiment)
15 and 16 show a sixth embodiment. As illustrated in the rear view of FIG. 15 and the side view of FIG. 16, the indicator 636 includes a rod-shaped portion 637 and a positioning mark 638 attached to the tip of the rod-shaped portion 637. As illustrated in FIGS. 15 and 16, the positioning mark 638 may be formed into a star shape. The positioning mark 638 is preferably a conspicuous mark that allows the operator to easily visually recognize the target. In addition, the positioning mark 638 may have a cross-sectional shape such as a round shape, a square shape, or a cross shape, and a three-dimensional shape such as a cubic shape, a rectangular parallelepiped shape, a spherical shape, a star shape, or the like.

(Seventh embodiment)
17 to 19 show a seventh embodiment. As illustrated in the rear view of FIG. 17 and the side view of FIG. 18, the indicator 736 may be provided separately from the sound collection auxiliary device main body 30a. The pointing tool 736 includes a fixing member 771 for fixing to the mobile terminal 3, a rod-shaped portion 737 provided on the fixing member 771, and a positioning mark 738 provided at the tip of the rod-shaped portion 737.

It is preferable that the indicator 736 and the sound collection auxiliary device main body 30a are configured as a set. It is desirable that the pointing tool 736 be configured to be fixedly positioned and installed with respect to the housing of the mobile terminal 3. That is, the positioning mark 738 of the indicating tool 736 is configured to point to a position that is a guideline for the point where the sound collection directivity of the sound collection auxiliary device 30a is to be strengthened when the sound collection auxiliary device 30a is installed in the mobile terminal 3. It is desirable to do so.
As illustrated in FIG. 19, when the pointing tool 736 is imaged by the imaging section 8 of the mobile terminal 3, the positioning mark 738 at the tip of the pointing tool 736 points to a part of the display screen 6a of the display section 6. In the example shown in FIG. 19, the pointing tool 736 is displayed on the upper part of the display screen 6a of the display unit 6. Similar effects can be achieved in such an embodiment as well.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and, for example, the following modifications or expansions are possible.

The mobile terminal 3 may display, on the display screen 6a of the display unit 6, a captured image captured in advance from the position where the sound should originally be collected as a transparent image together with a frame-shaped guide. Then, by operating the mobile terminal 3 and aligning the imaging area of the imaging unit 8 and the display screen 6a of the display unit 6 with the transmitted image, the operator can collect sound with good reproducibility. The operator can install the mobile terminal 3 at the optimum position by referring to the size of the image of the target device 20 relative to the size of the guide. For example, by using the guides and transparent images displayed on the display screen 6a, as well as the indicator 36, 536, 636, 736 described in the previous embodiment, the noise can be adjusted with high reproducibility according to the specific target device 20 (for example, the bearing 2a). can be obtained.

For example, in the first embodiment, the indicator 36 may be fixed to the sound collection auxiliary device 30 by providing several mounting holes in a part of the sound collection auxiliary device 30 and inserting and fixing the indicator 36 into the mounting holes. Further, the indicator 36 may be fixed to a part of the sound collection auxiliary device 30 using a fastening member such as a screw. For example, in the sixth embodiment, the sound collection auxiliary device 30 may be configured by being divided into a plurality of members, and may be sandwiched and fixed between the plurality of members. At this time, the indicator 536 may be configured to be movable by sliding it between a plurality of members.

Further, in the above-mentioned embodiments, the rod-shaped portions 37, 537, 637, 737 of the indicating tools 36, 536, 636, 736 are configured in a straight line, respectively, but they may be configured to be bent in the middle. However, it may be configured in a curved shape. The rod-shaped portions 37, 537, 637, and 737 may have any shape as long as they can be installed so that the positioning mark 38 of the pointing tool 36 can be displayed on the display screen 6a of the display unit 6.

As mentioned above, several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

In the drawings, 3 is a mobile terminal, 6 is a display unit, 8 is an imaging unit, 9 is a sound collection unit, 9a is a sound collection port, 31 is a support member (engaging part), and 231 is a sound collection base (engaging part). ), 331 is a wide-angle sound collecting member (engaging portion), 32, 232, 243, 332, 532 are communication holes, and 36, 536, 636, 736 are indicators.

Claims (5)

The device is configured to be attachable to a mobile terminal including an imaging unit that captures an image in a predetermined imaging direction, a display unit that displays the image captured by the imaging unit, and a sound collection port that collects sounds around the target device. ,
an engaging part that is attachably engaged with the mobile terminal;
a communication hole that passes through to the sound collection port and collects sounds around the target device;
When the mobile terminal is positioned on the engaging part, a partial area of the display screen is displayed on the display screen of the display part as a guideline for a location where the directivity of sound collected through the communication hole is to be strengthened. a pointing tool that can point and be placed so that the pointing area overlaps a specific target device ;
Sound collection auxiliary device equipped with. The engaging part includes an extending part extending in the direction of imaging by the imaging part,
The extension part covers the sound collection port of the mobile terminal, and
The sound collection auxiliary device according to claim 1, wherein the communication hole communicates from the sound collection port toward the imaging direction of the imaging unit. The communication hole, which is provided separately from the sound collection base having the sound collection port, is configured to be attachable to the sound collection base, and is provided toward the imaging direction from the sound collection port is formed into a wide angle shape. The sound collection auxiliary device according to claim 2, comprising a wide-angle sound collection adapter. The sound collection auxiliary device according to claim 2, further comprising a wide-angle sound collection member having a wide-angle opening extending from the sound collection port toward the imaging direction. Using the sound collection auxiliary device according to any one of claims 1 to 4,
A sound collection method in which the pointing tool that points to a partial area of the display screen of the display unit collects sound in accordance with the specific target device.

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