Micromotor abnormal sound recognition equipment based on time-frequency domain mutation characteristics

Abstract

The invention relates to the technical field of abnormal sound recognition equipment, and discloses micromotor abnormal sound recognition equipment based on time-frequency domain mutation characteristics, which comprises a detector and a sound insulation device, a radio microphone is mounted below the detector, the sound insulation device is arranged below the detector, the sound insulation device comprises a sound insulation box, and the sound insulation box is arranged below the detector. The sound insulation box is connected with the bottom of the detector, a hydraulic rod is installed in the sound insulation box, a first bottom plate and a second bottom plate are slidably installed in the sound insulation box, and the first bottom plate is connected with the hydraulic rod. Through the arrangement of the sound insulation device, when a worker detects the micromotor, the sound insulation box can isolate part of noise in a workshop, the situation that the noise around the micromotor is too much, and consequently the abnormal sound recognition detection result is affected is avoided, and through the arrangement of the detection window, the side plate, the first bottom plate and the second bottom plate, the noise in the workshop is reduced. A worker can carry out abnormal sound identification detection on micromotors at different positions.

Description

Technical Field

[0001] The present invention relates to the technical field of abnormal sound recognition equipment, and in particular to an abnormal sound recognition equipment for micro motors based on mutation characteristics in time and frequency domains. Background Art

[0002] The time-frequency domain mutation feature refers to the feature used to describe the simultaneous change of the signal in the time domain and frequency domain in the field of signal processing. These features are very useful for analyzing the transient properties and frequency component changes in non-stationary signals (such as sound, vibration, etc.). The micromotor abnormal sound recognition device can use signal processing and machine learning technology to identify the abnormal sound generated during the operation of the micromotor based on the time-frequency domain mutation features.

[0003] Chinese patent publication number CN 221039351 U discloses "a motor abnormal sound detection device", including a detection device, the detection device includes a conveying mechanism and a box body arranged on the conveying mechanism, the conveying mechanism is used to drive the box body to flow between a loading station, a detection station and a unloading station, the box body is provided with an opening, and the box body is provided with an interface for electrically connecting to the motor to be tested; a capping mechanism, which is arranged corresponding to the detection station, the capping mechanism includes a capping drive and a box cover driven and connected to the capping drive, the capping drive is used to drive the box cover to move to close or open the opening of the box body at the detection station; an industrial computer, which is electrically connected to the detection device, and the industrial computer is used to analyze the collected sound and judge the working condition of the motor to be tested; an unloading conveyor line, which is arranged corresponding to the unloading station, and the unloading conveyor line includes a good product conveyor line and a defective product conveyor line; and an unloading mechanism. This patent realizes automatic recognition and detection of abnormal working noise of the motor.

[0004] During the conception process, the applicant searched a large number of patent documents on the patent network. For example, China Patent Publication No. CN221039351 U discloses "a motor abnormal sound detection device". When in use, the motor needs to be placed on the device for detection. When some micromotors need to be regularly inspected in the workshop, since the micromotors have been installed on the workstations and some micromotors are running, it is not convenient to disassemble them. In addition, the installation positions of different micromotors are different, which makes it inconvenient for the device to detect the installed micromotors. Therefore, a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics is proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics, which solves the problem that when some micromotors need to be regularly inspected in the workshop, the micromotors have been installed on the workstations and some micromotors are running and are not convenient to disassemble. In addition, the installation positions of different micromotors are different, which makes it inconvenient for the detection equipment to detect the installed and used micromotors.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics, comprising:

[0009] Detector;

[0010] Sound insulation device, used to isolate the noise in the workshop;

[0011] Amplifying device, used for receiving and amplifying sound;

[0012] Drying components, used to keep the interior of the sound insulation device dry;

[0013] A sound receiving microphone is installed below the detector, the sound insulation device is arranged below the detector, the sound amplifying device is arranged inside the sound insulation device, the drying component is arranged inside the sound insulation device, the sound insulation device includes a sound insulation box, the sound insulation box is connected to the bottom of the detector, a hydraulic rod is installed inside the sound insulation box, a bottom plate No. 1 and a bottom plate No. 2 are slidably installed inside the sound insulation box, and the bottom plate No. 1 is connected to the hydraulic rod.

[0014] Preferably, a No. 1 rack is connected to the No. 1 base plate, a No. 1 gear is rotatably installed inside the sound insulation box, a No. 2 rack is installed on the No. 2 base plate, and both the No. 1 rack and the No. 2 rack are meshed with the No. 1 gear.

[0015] Preferably, the soundproof box is provided with a detection window, the detection window is provided with a dust cover, the inner wall of the soundproof box is hinged with a side panel, and the bottom of the soundproof box is installed with two telescopic rods.

[0016] Preferably, the telescopic ends of the two telescopic rods are connected to the side panels, an abutment frame is installed on the first bottom plate, and the two telescopic rods are slidably connected to the abutment frame.

[0017] Preferably, the sound amplifying device includes a sound receiving cover, which is rotatably mounted inside a sound insulation box, a connecting groove is installed on the sound receiving cover, a sound amplifying cover is installed inside the sound insulation box, a sound transmission rod is installed at the bottom of the sound amplifying cover, and the connecting groove is slidably connected to the bottom of the sound transmission rod.

[0018] Preferably, a mounting frame is installed on the inner wall of the soundproof box, a push rod is hinged on the sound cover, a lever is hinged on the second bottom plate, and two counterweights are installed on the sound cover.

[0019] Preferably, the inner wall of the push rod is slidably connected to the mounting frame, the inner wall of the lever is rotationally connected to the mounting frame, and the push rod is located on the movement trajectory of the lever.

[0020] Preferably, the drying component includes four connecting columns, two of which are installed on base plate No. 1, and the other two are installed on base plate No. 2, and the four connecting columns are arranged in mirror image to each other. A drying box is installed on the connecting columns, and the top of the drying box is slidably connected to the top of the inner wall of the sound insulation box.

[0021] Preferably, a rotating shaft is rotatably mounted on the inner wall of the drying box, a plurality of stirring blades are mounted on the rotating shaft, a No. 2 gear is mounted on the end of the rotating shaft away from the drying box, two No. 3 racks are mounted on the inner wall of the soundproof box, and the four No. 2 gears are respectively meshed with the two No. 3 racks.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics, which has the following beneficial effects:

[0024] 1. The micromotor abnormal sound identification equipment based on the time-frequency domain mutation characteristics, through the setting of the sound insulation device, enables the staff to isolate part of the noise in the workshop when testing the micromotor, and avoid the influence of the abnormal sound identification detection result caused by the large amount of surrounding noise, and through the setting of the detection window, side panel, No. 1 bottom plate, and No. 2 bottom plate, the staff can perform abnormal sound identification detection on the micromotor at different positions. When the micromotor enters the sound insulation box from the side panel position, the No. 1 bottom plate and the No. 2 bottom plate are in a closed state. When the micromotor enters the sound insulation box from the No. 1 bottom plate and the No. 2 bottom plate, the side panel is in a closed state, which further improves the sound insulation effect and is convenient for the staff to operate. The staff can adjust according to the position of different micromotors and cooperate with the manual support of the sound insulation box to perform abnormal sound identification detection on the micromotor.

[0025] 2. The micromotor abnormal sound recognition device based on the time-frequency domain mutation characteristics, through the setting of the sound amplification device, enables the sound receiving cover to collect the sound emitted by the micromotor, and then releases the sound around the microphone after amplifying it through the sound amplification cover, thereby enhancing the volume recorded by the microphone and improving the accuracy of abnormal sound recognition detection; through the cooperation of the counterweight block, the push rod and the lever, the sound receiving cover can adjust the angle according to the position of the micromotor, keep the cover opening of the sound receiving cover facing the position of the micromotor, and further improve the sound receiving effect.

[0026] 3. The micromotor abnormal sound recognition device based on the time-frequency domain mutation characteristics, through the setting of the drying component, enables the desiccant in the four drying boxes to maintain the dryness inside the soundproof box, avoiding the risk of corrosion and oxidation of the electronic components and connectors inside the microphone when the soundproof box is used in a humid environment, resulting in the performance degradation or even failure of the microphone. Through the setting of the stirring blades, when the No. 1 bottom plate and the No. 2 bottom plate move, the stirring blades are driven by the rotating shaft to rotate, so that multiple stirring blades can turn over the desiccant in the drying box, avoiding the surface agglomeration of the desiccant after long-term use. The surface agglomeration will block the desiccant in the lower layer from absorbing moisture, thereby affecting the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the appearance of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a sound insulation device for a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0030] Figure 4 A schematic diagram of the soundproof box structure of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a sound amplification device of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a sound collecting cover of a micromotor abnormal sound recognition device based on the time-frequency domain mutation characteristics proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of a dry component of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention;

[0034] Figure 8 This is a schematic diagram of the drying box structure of a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics proposed by the present invention.

[0035] In the figure: 1. detector; 2. microphone; 3. sound insulation device; 31. sound insulation box; 32. hydraulic rod; 33. bottom plate No. 1; 34. rack No. 1; 35. gear No. 1; 36. rack No. 2; 37. bottom plate No. 2; 38. abutment frame; 39. telescopic rod; 310. side panel; 311. detection window; 4. sound amplification device; 41. sound receiving cover; 42. connecting groove; 43. sound transmission rod; 44. sound amplification cover; 45. counterweight; 46. push rod; 47. mounting frame; 48. lever; 5. drying assembly; 51. connecting column; 52. drying box; 53. rotating shaft; 54. gear No. 2; 55. rack No. 3; 56. stirring blade. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figure 1-Figure 4 A micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics comprises: a detector 1; a sound insulation device 3 for isolating the noise in the workshop; a sound receiving microphone 2 is installed below the detector 1, and the sound insulation device 3 is arranged below the detector 1. The sound insulation device 3 comprises a sound insulation box 31, the sound insulation box 31 is connected to the bottom of the detector 1, a hydraulic rod 32 is installed inside the sound insulation box 31, a first bottom plate 33 and a second bottom plate 37 are slidably installed inside the sound insulation box 31, the first bottom plate 33 is connected to the hydraulic rod 32, a first rack 34 is connected to the first bottom plate 33, and a first gear 35 is rotatably installed inside the sound insulation box 31. , a No. 2 rack 36 is installed on the No. 2 base plate 37, and the No. 1 rack 34 and the No. 2 rack 36 are both meshed with the No. 1 gear 35. The hydraulic rod 32 is started, and the hydraulic rod 32 drives the No. 1 base plate 33 to move forward. When the No. 1 base plate 33 moves forward, the No. 1 gear 35 is driven to rotate through the No. 1 rack 34. The No. 1 gear 35 drives the No. 2 rack 36 to move backward, and the No. 2 rack 36 drives the No. 2 base plate 37 to move backward, so that the No. 1 base plate 33 and the No. 2 base plate 37 can move in opposite directions synchronously. At this time, the sound insulation box 31 is placed downward from the top of the micromotor so that the micromotor is located inside the sound insulation box 31 to complete the abnormal sound recognition detection.

[0039] For further information, see Figure 3-Figure 4The soundproof box 31 is provided with a detection window 311, a dust cover is provided on the detection window 311, the inner wall of the soundproof box 31 is hinged with a side panel 310, and two telescopic rods 39 are installed at the bottom of the soundproof box 31. When the staff needs to detect the disassembled micromotor, the dust cover on the detection window 311 can be opened, the micromotor can be placed on the side panel 310, and the detector 1 can be started. The detector 1 performs abnormal sound recognition detection on the micromotor through the microphone 2; when the staff needs to detect the micromotor located on the vertical plane, the staff will lift the soundproof box 31 and align the detection window 311 with the detection window 311. The micromotor is arranged so that the micromotor is located inside the sound insulation box 31, so that the microphone 2 and the detector 1 can complete the abnormal sound recognition detection. The telescopic ends of the two telescopic rods 39 are connected to the side panel 310. A resistance frame 38 is installed on the No. 1 bottom plate 33. The two telescopic rods 39 are slidably connected to the resistance frame 38. The No. 1 bottom plate 33 drives the resistance frame 38 to move synchronously. During the forward movement of the resistance frame 38, the two telescopic rods 39 are driven to rotate forward with the hinge point between the two telescopic rods 39 and the sound insulation box 31 as the center. The two telescopic rods 39 drive the side panel 310 to rotate while rotating forward, so that the side panel 310 and the sound insulation box 31 are closed.

[0040] By setting the sound insulation device 3, when the staff detects the micromotor, the sound insulation box 31 can isolate part of the noise in the workshop to avoid the surrounding noise affecting the abnormal sound recognition detection result, and by setting the detection window 311, the side panel 310, the first bottom plate 33, and the second bottom plate 37, the staff can perform abnormal sound recognition detection on the micromotor at different positions. When the micromotor enters the sound insulation box 31 from the side panel 310, the first bottom plate 33 and the second bottom plate 37 are in a closed state. When the micromotor enters the sound insulation box 31 from the first bottom plate 33 and the second bottom plate 37, the side panel 310 is in a closed state, which further improves the sound insulation effect and is convenient for the staff to operate. The staff can make adjustments according to the positions of different micromotors and cooperate with the manual support of the sound insulation box 31 to perform abnormal sound recognition detection on the micromotor.

[0041] In this embodiment, the sound amplifying device 4 is used for receiving and amplifying sound.

[0042] See also Figure 5-Figure 6 The sound amplifying device 4 is arranged inside the sound insulation device 3, and the sound amplifying device 4 includes a sound receiving cover 41, which is rotatably installed inside the sound insulation box 31, and a connecting groove 42 is installed on the sound receiving cover 41. A sound amplifying cover 44 is installed inside the sound insulation box 31, and a sound transmission rod 43 is installed at the bottom of the sound amplifying cover 44. The connecting groove 42 is slidably connected to the bottom of the sound transmission rod 43. The sound emitted by the micromotor is received by the sound receiving cover 41, and the sound receiving cover 41 transmits the sound to the sound amplifying cover 44 through the connecting groove 42 and the sound transmission rod 43. Since the sound microphone 2 is located inside the cover body of the sound amplifying cover 44, the sound amplifying cover 44 can release the sound around the sound microphone 2 to achieve the effect of sound amplification.

[0043] For further information, see Figure 5-Figure 6 The inner wall of the soundproof box 31 is installed with a mounting frame 47, a push rod 46 is hinged on the sound cover 41, a lever 48 is hinged on the second bottom plate 37, and two counterweights 45 are installed on the sound cover 41. When the first bottom plate 33 and the second bottom plate 37 are opened, due to the gravity of the two counterweights 45, the cover opening of the sound cover 41 faces directly downward, the inner wall of the push rod 46 is slidably connected to the mounting frame 47, the inner wall of the lever 48 is rotatably connected to the mounting frame 47, and the push rod 46 is located at the lever 48. On the motion trajectory, when the No. 1 bottom plate 33 and the No. 2 bottom plate 37 are closed, the No. 2 bottom plate 37 drives the lever 48 to rotate with the connection between it and the mounting bracket 47 as the center. During the rotation of the lever 48, it contacts and drives the push rod 46 to rotate with the connection between it and the mounting bracket 47 as the center. When the push rod 46 rotates, it pushes the sound cover 41 toward the side panel 310, so that the sound cover 41 can rotate when the side panel 310 is opened, so that the cover opening is aligned with the micromotor at the side panel 310.

[0044] By setting up the sound amplifying device 4, the sound receiving cover 41 can collect the sound emitted by the micromotor, and then amplify the sound through the sound amplifying cover 44 and release it around the sound receiving microphone 2, thereby enhancing the volume recorded by the sound receiving microphone 2 and improving the accuracy of abnormal sound recognition detection; by cooperating with the counterweight block 45, the push rod 46 and the lever 48, the sound receiving cover 41 can adjust the angle according to the position of the micromotor, keep the cover opening of the sound receiving cover 41 facing the position of the micromotor, and further improve the sound receiving effect.

[0045] In this embodiment, the drying component 5 is used to keep the interior of the sound insulation device 3 dry.

[0046] See also Figure 7-Figure 8The drying assembly 5 is arranged inside the sound insulation device 3. The drying assembly 5 includes four connecting columns 51, two of which are installed on the first bottom plate 33, and the other two connecting columns 51 are installed on the second bottom plate 37. The four connecting columns 51 are arranged in a mirror image to each other. A drying box 52 is installed on the connecting column 51. The staff adds desiccant into the four drying boxes 52 in advance. The top of the drying box 52 is slidably connected with the top of the inner wall of the sound insulation box 31. When the first bottom plate 33 and the second bottom plate 37 move, the first bottom plate 33 and the second bottom plate 37 respectively drive the four connecting columns 51 to move, and the four connecting columns 51 respectively drive the four drying boxes 52 to move; the drying box A rotating shaft 53 is rotatably installed on the inner wall of 52, and a plurality of stirring blades 56 are installed on the rotating shaft 53. A No. 2 gear 54 is installed on the end of the rotating shaft 53 away from the drying box 52. Two No. 3 racks 55 are installed on the inner wall of the sound insulation box 31. The four No. 2 gears 54 are respectively meshed with the two No. 3 racks 55. When the drying box 52 moves, the rotating shaft 53 is driven to move, and the rotating shaft 53 drives the No. 2 gear 54 to move synchronously. When the No. 2 gear 54 moves, it is driven by the No. 3 rack 55 to rotate, so that the No. 2 gear 54 drives the rotating shaft 53 to rotate. When the rotating shaft 53 rotates, it drives the plurality of stirring blades 56 to rotate, and the plurality of stirring blades 56 stir the desiccant in the drying box 52.

[0047] By setting the drying component 5, the desiccant in the four drying boxes 52 can maintain the dryness inside the sound insulation box 31, avoiding the risk of corrosion and oxidation of the electronic components and connectors inside the microphone 2 when the sound insulation box 31 is used in a humid environment, resulting in a degradation of the performance of the microphone or even failure. By setting the stirring blades 56, when the No. 1 bottom plate 33 and the No. 2 bottom plate 37 move, the stirring blades 56 are driven by the rotating shaft 53 to rotate, so that the multiple stirring blades 56 can turn over the desiccant in the drying box 52, avoiding the surface agglomeration of the desiccant after long-term use. The surface agglomeration will prevent the desiccant in the lower layer from absorbing moisture, thereby affecting the drying effect.

[0048] The electrical components appearing in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0049] Working principle: when the staff needs to test the disassembled micromotor, the dust cover on the detection window 311 can be opened, the micromotor can be placed on the side panel 310, and the detector 1 can be started. The detector 1 can perform abnormal sound recognition detection on the micromotor through the sound microphone 2; when the staff needs to test the micromotor located on the vertical plane, the staff will lift the soundproof box 31, align the detection window 311 with the micromotor, so that the micromotor is located inside the soundproof box 31, so that the sound microphone 2 and the detector 1 complete the abnormal sound recognition detection; when the staff needs to test the micromotor located on the plane, the staff will lift the soundproof box 31, align the detection window 311 with the micromotor, so that the micromotor is located inside the soundproof box 31, so that the sound microphone 2 and the detector 1 complete the abnormal sound recognition detection. When the micromotor is used for detection, the hydraulic rod 32 is started, and the hydraulic rod 32 drives the No. 1 bottom plate 33 to move forward. When the No. 1 bottom plate 33 moves forward, the No. 1 gear 35 is driven to rotate through the No. 1 rack 34. The No. 1 gear 35 drives the No. 2 rack 36 to move backward, and the No. 2 rack 36 drives the No. 2 bottom plate 37 to move backward, so that the No. 1 bottom plate 33 and the No. 2 bottom plate 37 are in an open state. When the No. 1 bottom plate 33 moves, the No. 1 bottom plate 33 drives the contact frame 38 to move synchronously. During the forward movement of the contact frame 38, the two telescopic rods 39 are driven to contact the sound insulation box 31 with each other. The two telescopic rods 39 rotate forward as the center, and the side panels 310 rotate while the two telescopic rods 39 rotate forward, so that the side panels 310 and the sound insulation box 31 are closed. At this time, the sound insulation box 31 is placed downward from the top of the micromotor, so that the micromotor is located inside the sound insulation box 31, and the abnormal sound recognition detection is completed. Through the setting of the sound insulation device 3, when the staff detects the micromotor, the sound insulation box 31 can isolate part of the noise in the workshop, avoid the surrounding noise from affecting the abnormal sound recognition detection result, and through the detection window 311, the side panel 310, the bottom The arrangement of the first bottom plate 33 and the second bottom plate 37 allows the staff to perform abnormal sound recognition detection on the micromotors in different positions. When the micromotor enters the soundproof box 31 from the side plate 310, the first bottom plate 33 and the second bottom plate 37 are in a closed state. When the micromotor enters the soundproof box 31 from the first bottom plate 33 and the second bottom plate 37, the side plate 310 is in a closed state, which further improves the sound insulation effect and is convenient for the staff to operate. The staff can make adjustments according to the positions of different micromotors and cooperate with the manual support of the soundproof box 31 to perform abnormal sound recognition detection on the micromotor.

[0050] When the micromotor is located inside the soundproof box 31, the sound emitted by the micromotor is received by the sound receiving cover 41, and the sound receiving cover 41 transmits the sound to the sound amplifying cover 44 through the connecting groove 42 and the sound transmitting rod 43. Since the sound receiving microphone 2 is located inside the cover body of the sound amplifying cover 44, the sound amplifying cover 44 can release the sound around the sound receiving microphone 2 to achieve the effect of sound amplification. When the first bottom plate 33 and the second bottom plate 37 are opened, due to the gravity of the two counterweights 45, the cover opening of the sound receiving cover 41 faces directly downward, which is convenient for receiving the sound of the micromotor. When the first bottom plate 33 and the second bottom plate 37 are closed, the second bottom plate 37 drives the lever 48 to rotate with the connection between it and the mounting frame 47 as the center of the circle. During the rotation of the lever 48, it contacts and drives the push rod 46 to rotate with the connection between it and the mounting frame 47 as the center of the circle. When the push rod 46 rotates, it pushes the sound cover 41 toward the side panel 310. At this time, the side panel 310 moves to a horizontal state through the cooperation of the two telescopic rods 39 and the abutment frame 38, so that the sound cover 41 can rotate when the side panel 310 is opened, so that the cover opening is aligned with the micromotor at the side panel 310; through the setting of the sound amplification device 4, the sound cover 41 can collect the sound emitted by the micromotor, and then amplify the sound through the sound amplification cover 44 and release it around the sound microphone 2, thereby enhancing the volume recorded by the sound microphone 2 and improving the accuracy of abnormal sound recognition detection; through the cooperation of the counterweight block 45, the push rod 46 and the lever 48, the sound cover 41 can adjust the angle according to the position of the micromotor, keep the cover opening of the sound cover 41 facing the position of the micromotor, and further improve the sound collection effect.

[0051] When the No. 1 bottom plate 33 and the No. 2 bottom plate 37 move, the No. 1 bottom plate 33 and the No. 2 bottom plate 37 respectively drive the four connecting columns 51 to move, and the four connecting columns 51 respectively drive the four drying boxes 52 to move. When the soundproof box 31 is used in a relatively humid environment, the staff will add desiccant into the four drying boxes 52 in advance to maintain the dryness inside the soundproof box 31. When the drying box 52 moves, the drying box 52 drives the rotating shaft 53 to move, and the rotating shaft 53 drives the No. 2 gear 54 to move synchronously. When the No. 2 gear 54 moves, it rotates through the drive of the No. 3 rack 55, so that the No. 2 gear 54 drives the rotating shaft 53 to rotate, and when the rotating shaft 53 rotates, it drives the multiple stirring blades 56 to rotate, and the multiple stirring blades 56 have an impact on the drying box 5 2 is stirred. By setting the drying component 5, the desiccant in the four drying boxes 52 can maintain the dryness inside the sound insulation box 31, so as to avoid the risk of corrosion and oxidation of the electronic components and connectors inside the sound receiving microphone 2 when the sound insulation box 31 is used in a humid environment, resulting in the performance degradation or even failure of the microphone. By setting the stirring blades 56, when the No. 1 bottom plate 33 and the No. 2 bottom plate 37 move, the stirring blades 56 are driven by the rotating shaft 53 to rotate, so that the multiple stirring blades 56 can turn over the desiccant in the drying box 52, so as to avoid the surface agglomeration of the desiccant after long-term use. The surface agglomeration will block the desiccant in the lower layer from absorbing moisture, thereby affecting the drying effect.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics, characterized in that: include: Detector (1); A sound insulation device (3) for isolating the noise in the workshop; A sound amplification device (4) for receiving and amplifying sound; A drying component (5) for keeping the interior of the sound insulation device (3) dry; A sound receiving microphone (2) is installed below the detector (1); the sound insulation device (3) is arranged below the detector (1); the sound amplifying device (4) is arranged inside the sound insulation device (3); the drying component (5) is arranged inside the sound insulation device (3); the sound insulation device (3) comprises a sound insulation box (31); the sound insulation box (31) is connected to the bottom of the detector (1); a hydraulic rod (32) is installed inside the sound insulation box (31); a first bottom plate (33) and a second bottom plate (37) are slidably installed inside the sound insulation box (31); the first bottom plate (33) is connected to the hydraulic rod (32).

2. According to claim 1, a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics is characterized by: A rack (34) is connected to the first base plate (33), a gear (35) is rotatably mounted inside the soundproof box (31), a rack (36) is mounted on the second base plate (37), and both the rack (34) and the rack (36) are meshed with the gear (35).

3. According to claim 2, a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics is characterized by: The soundproof box (31) is provided with a detection window (311), and a dust cover is provided on the detection window (311). The inner wall of the soundproof box (31) is hinged with a side panel (310), and the bottom of the soundproof box (31) is installed with two telescopic rods (39).

4. According to claim 3, a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics is characterized by: The telescopic ends of the two telescopic rods (39) are connected to the side plate (310), a resistance frame (38) is installed on the first bottom plate (33), and the two telescopic rods (39) are slidably connected to the resistance frame (38).

5. According to claim 4, a micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics is characterized by: The sound amplifying device (4) comprises a sound receiving cover (41), the sound receiving cover (41) is rotatably mounted inside a sound insulation box (31), a connecting groove (42) is mounted on the sound receiving cover (41), a sound amplifying cover (44) is mounted inside the sound insulation box (31), a sound transmission rod (43) is mounted at the bottom of the sound amplifying cover (44), and the connecting groove (42) is slidably connected to the bottom of the sound transmission rod (43).

6. The micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics according to claim 5 is characterized by: The inner wall of the soundproof box (31) is installed with a mounting frame (47), the sound receiving cover (41) is hinged with a push rod (46), the second bottom plate (37) is hinged with a lever (48), and the sound receiving cover (41) is installed with two counterweights (45).

7. The micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics according to claim 6 is characterized by: The inner wall of the push rod (46) is slidably connected to the mounting frame (47), the inner wall of the lever (48) is rotationally connected to the mounting frame (47), and the push rod (46) is located on the movement track of the lever (48).

8. The micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics according to claim 7 is characterized by: The drying component (5) comprises four connecting columns (51), two of which are mounted on the first base plate (33), and the other two connecting columns (51) are mounted on the second base plate (37). The four connecting columns (51) are arranged in a mirror image to each other. A drying box (52) is mounted on the connecting columns (51), and the top of the drying box (52) is slidably connected to the top of the inner wall of the soundproof box (31).

9. The micromotor abnormal sound recognition device based on time-frequency domain mutation characteristics according to claim 8 is characterized by: A rotating shaft (53) is rotatably mounted on the inner wall of the drying box (52), and a plurality of stirring blades (56) are mounted on the rotating shaft (53). A No. 2 gear (54) is mounted on one end of the rotating shaft (53) away from the drying box (52). Two No. 3 racks (55) are mounted on the inner wall of the soundproof box (31), and the four No. 2 gears (54) are respectively meshed with the two No. 3 racks (55).

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