CN116698973A - Knocking device - Google Patents

Knocking device Download PDF

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Publication number
CN116698973A
CN116698973A CN202310708516.0A CN202310708516A CN116698973A CN 116698973 A CN116698973 A CN 116698973A CN 202310708516 A CN202310708516 A CN 202310708516A CN 116698973 A CN116698973 A CN 116698973A
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CN
China
Prior art keywords
base
support arm
knocking
electromagnet
execution assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310708516.0A
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Chinese (zh)
Inventor
陈奕杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
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Huazhong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN202310708516.0A priority Critical patent/CN116698973A/en
Publication of CN116698973A publication Critical patent/CN116698973A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The embodiment of the application discloses a knocking device, which comprises: the base is provided with an electromagnet; the execution assembly is hinged on the base and used for executing knocking actions, and a magnetic attraction piece is arranged on the execution assembly and matched with the electromagnet so as to drive the execution assembly to move; the reset piece is arranged between the execution assembly and the base so as to reset the execution assembly to an initial position. According to the knocking device provided by the application, the electromagnet arranged on the base is matched with the magnetic attraction piece arranged on the execution assembly, and the execution assembly is reset to the initial position by the reset piece, so that the knocking action is realized, the impact sound generated by the knocking device is reduced, the noise component in the acoustic detection process is reduced, the deviation of the detection result caused by the noise component is reduced, and the detection precision of the acoustic detection method is further improved.

Description

Knocking device
Technical Field
The application relates to the technical field of acoustic detection, in particular to a knocking device.
Background
The acoustic detection method is a common method for detecting damage of parts or agricultural products, and the method needs to use external force to excite the detected object so as to enable the detected object to vibrate to generate acoustic radiation, and the damage condition of the detected object can be obtained by analyzing the acoustic radiation. When an external force is used for exciting a detected object, collision contact sound emitted by the mechanism is overlapped with the knocking sound, so that deviation of a detection result is caused, and the detection precision of an acoustic detection method is lower.
Therefore, how to improve the detection accuracy of the acoustic detection method is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present application is to provide a knocking device for improving the detection accuracy of an acoustic detection method.
In order to achieve the above purpose, the present application provides the following technical solutions:
a tapping device, comprising:
the base is provided with an electromagnet;
the execution assembly is hinged to the base and used for executing knocking actions, and a magnetic attraction piece is arranged on the execution assembly and matched with the electromagnet so as to drive the execution assembly to move;
and the resetting piece is arranged between the execution assembly and the base so as to reset the execution assembly to an initial position.
Optionally, in the above knocking device, the executing assembly includes a knocking member, a first end of the knocking member is provided with a connecting member, the connecting member is provided with a connecting portion, and the connecting portion is hinged to the base through a hinge member.
Optionally, in the knocking device, a counterweight is disposed at the second end of the knocking device, and the counterweight is used for improving the knocking force of the knocking device.
Optionally, in the knocking device, a silica gel sleeve for reducing collision sound is sleeved on the outer side of the knocking piece.
Optionally, in the knocking device, a hinge slot for installing the hinge member is formed in the base, the hinge slot is provided with a support arm, the support arm includes a first support arm and a second support arm opposite to the first support arm, a connection portion of the connection member is located in the hinge slot, the hinge member sequentially passes through the first support arm, the connection portion of the connection member, and the second support arm, and the reset member is located in the hinge slot.
Optionally, in the knocking device, the hinge member includes a pin shaft and a sleeve sleeved on the outer side of the pin shaft, the pin shaft sequentially passes through the first support arm, the connecting portion of the connecting member, and the second support arm, the two sleeves are respectively located between the connecting member and the support arms, and a bearing is disposed between the sleeve and the connecting member.
Optionally, in the knocking device, the restoring member is a torsion spring, and a connecting portion of the connecting member is provided with a mounting groove for mounting the restoring member.
Optionally, in the knocking device, the base is provided with a receiving groove, and the electromagnet is disposed in the receiving groove.
Optionally, in the knocking device, the magnetic attraction member is a permanent magnet, and the magnetic attraction member and the electromagnet are coaxially arranged.
Optionally, in the knocking device, a noise-reducing cotton pad is disposed between the electromagnet and the magnetic attraction piece.
According to the knocking device provided by the application, the execution assembly is hinged with the base, the electromagnet is arranged on the base, the magnetic attraction piece is arranged on the execution assembly, when pulse current is connected to the electromagnet, repulsive force is generated between the electromagnet and the magnetic attraction piece, the execution assembly is pushed away from the base under the action of repulsive force, at the moment, the current can be interrupted, and the execution assembly is reset to the initial position under the action of the reset piece, so that one knocking is completed.
Compared with the prior art, the knocking device provided by the application has the advantages that the electromagnet arranged on the base is matched with the magnetic attraction piece arranged on the execution assembly, and the execution assembly is reset to the initial position by the reset piece, so that the knocking action is realized, the impact sound generated by the knocking device is reduced, the noise component in the acoustic detection process is reduced, the deviation of the detection result caused by the noise component is reduced, and the detection precision of the acoustic detection method is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is an isometric view of a tapping device according to an embodiment of the present application;
FIG. 2 is a side view of a tapping device according to an embodiment of the present application;
fig. 3 is a front view of a knocking device according to an embodiment of the present application.
Wherein 100 is a base, 101 is an electromagnet, 102 is a noise-reducing cotton pad, 103 is a magnetic attraction piece, 104 is a silica gel sleeve, 105 is a counterweight piece, 106 is a connecting piece, 107 is a pin shaft, 108 is a sleeve, 109 is a bearing, 110 is a reset piece, and 111 is a pin shaft nut.
Detailed Description
The application aims at providing a knocking device to improve the detection precision of an acoustic detection method.
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1 and 2, an embodiment of the present application discloses a striking device including a base 100, an actuating assembly, and a reset member 110. In the prior art, the acoustic detection method is a common method for detecting damage of parts or agricultural products, and the method needs to use external force to excite the detected object to vibrate to generate acoustic radiation, and the damage condition of the detected object can be obtained by analyzing the acoustic radiation. When an external force is used for exciting a detected object, collision contact sound emitted by the mechanism is overlapped with the knocking sound, so that deviation of a detection result is caused, and the detection precision of an acoustic detection method is lower. According to the knocking device disclosed by the embodiment of the application, the electromagnet 101 arranged on the base 100 is matched with the magnetic attraction piece 103 arranged on the execution assembly, and the execution assembly is reset to the initial position by the reset piece 110, so that the knocking action is realized, the impact sound generated by the knocking device is reduced, the noise component in the acoustic detection process is reduced, the deviation of the detection result caused by the noise component is reduced, and the detection precision of the acoustic detection method is further improved.
As shown in fig. 2, an electromagnet 101 is disposed on the base 100. Specifically, the base 100 is provided with a receiving groove, and the electromagnet 101 is disposed in the receiving groove. Meanwhile, the executing component is hinged on the base 100, so that the executing component can rotate around the base 100 to execute knocking action, the executing component is provided with a magnetic attraction piece 103, the magnetic attraction piece 103 is matched with the electromagnet 101 to drive the executing component to move, in the embodiment of the application, the magnetic attraction piece 103 is a permanent magnet, and the magnetic attraction piece 103 and the electromagnet 101 are coaxially arranged. The reset element 110 is disposed between the execution assembly and the base 100, so as to reset the execution assembly to the initial position, thereby completing the knocking operation. It should be noted that, the initial position of the execution assembly is the position where the execution assembly is located when no external force excitation is applied, i.e. the position where the execution assembly contacts with the measured object.
Further, as shown in fig. 1 and 3, the executing assembly includes a knocking member, a first end of the knocking member is provided with a connecting member 106, a magnetic attraction member is provided on the connecting member 106, and a magnetic attraction member 103 is provided coaxially with the electromagnet 101. A connection part is provided on the connection member 106 and is hinged to the base 100 by a hinge member so that the striking member can rotate around the hinge member, thereby completing the striking operation. In order to increase the knocking force of the knocking member, a counterweight 105 is disposed at the second end of the knocking member, and in the embodiment of the application, the counterweight 105 is a counterweight core disposed at the second end of the knocking member. Meanwhile, in order to reduce the knocking sound, a silica gel cover 104 for reducing the collision sound is sleeved on the outer side of the knocking member, and in order to further reduce the collision sound of the knocking device itself, a noise reduction cotton pad 102 is provided between the electromagnet 101 and the magnetic attraction member 103. It should be noted that, the connecting member 106 and the knocking member may be integrally formed, or may be detachably connected and separated. When the connecting member 106 and the knocking member are in a detachable and detachable structure, the knocking member and the connecting member 106 may be screw-coupled.
In a specific embodiment, when the electromagnet 101 is connected to the unidirectional pulse current, a repulsive force is generated between the electromagnet 101 and the magnetic attraction member 103, the execution assembly is pushed away from the base 100, the current is interrupted, the repulsive force between the electromagnet 101 and the magnetic attraction member 103 disappears, the execution assembly moves towards a direction close to the base 100 under the action of the reset member 110 and resets to an initial position, and the execution assembly completes one knocking. As will be appreciated by those skilled in the art, when the electromagnet 101 is connected to the unidirectional pulse current, the magnitude of the unidirectional pulse current can be adjusted within a certain range, so as to control the magnitude of the repulsive force, and further control the distance that the actuating assembly pushes away from the base 100, thereby controlling the striking force of the actuating assembly.
In another embodiment, when the electromagnet 101 is connected to the bidirectional pulse current, a repulsive force is generated between the electromagnet 101 and the magnetic attraction piece 103 under the action of the forward current, the execution assembly is pushed away from the base 100, at this time, the current is reversed, a suction force is generated between the electromagnet 101 and the magnetic attraction piece 103, the execution assembly rapidly moves to a direction close to the base 100 under the combined action of the reset piece 110 and the suction force and resets to an initial position, and the execution assembly rapidly completes one knocking. It will be appreciated by those skilled in the art that in experiments such as crack detection, the tapping efficiency of the tapping device is a factor to be considered, and when the electromagnet 101 is connected to the bi-directional pulse current, the time required for the execution assembly to complete the entire tapping operation can be shortened, so as to improve the tapping efficiency of the tapping device.
According to the knocking device disclosed by the application, the execution assembly is hinged with the base 100, the electromagnet 101 is arranged on the base 100, the magnetic attraction piece 103 is arranged on the execution assembly, when pulse current is connected to the electromagnet 101, repulsive force is generated between the electromagnet 101 and the magnetic attraction piece 103, the execution assembly is pushed away from the base 100 under the action of repulsive force, at the moment, the current can be interrupted, and the execution assembly is reset to the initial position under the action of the reset piece 110, so that one knocking is completed.
Compared with the prior art, the knocking device disclosed by the application has the advantages that the electromagnet 101 arranged on the base 100 is matched with the magnetic attraction piece 103 arranged on the execution assembly, and the execution assembly is reset to the initial position by the reset piece 110, so that the knocking action is realized, the impact sound generated by the knocking device is reduced, the noise component in the acoustic detection process is reduced, the deviation of the detection result caused by the noise component is reduced, and the detection precision of the acoustic detection method is further improved.
Further, as shown in fig. 2, the base 100 is provided with a hinge slot for installing the hinge element, the hinge slot is provided with a support arm, the support arm includes a first support arm and a second support arm opposite to the first support arm, the connection portion of the connection element 106 is located in the hinge slot, the hinge element sequentially passes through the first support arm, the connection portion of the connection element 106 and the second support arm, and the reset element 110 is located in the hinge slot. Specifically, the hinge member includes a pin 107 and a sleeve 108 sleeved outside the pin 107, and the pin 107 sequentially passes through the first support arm, the connection portion of the connection member 106, and the second support arm, and is fixed outside the second support arm by a pin nut 111. The number of the sleeves 108 is two, the two sleeves 108 are respectively located between the connecting piece 106 and the supporting arm, and a bearing 109 is arranged between the sleeve 108 and the connecting piece 106. In the embodiment of the present application, the restoring member 110 is a torsion spring, and the connecting portion of the connecting member 106 is provided with a mounting groove, and the restoring member 110 is mounted in the mounting groove. When the restoring member 110 is a torsion spring, the torsion spring is sleeved on the outer side of the pin 107, and one torsion arm of the torsion spring is fixed on the connecting portion of the connecting member 106, and the other torsion arm of the torsion spring is fixed on the base 100, so that the connecting member 106 can be quickly restored to the initial position under the action of torsion force. Through the cooperation of sleeve 108, bearing 109 and torsion spring, can not produce collision noise because of existence clearance when having guaranteed that the articulated elements rotates smoothly to influence the signal acquisition when acoustic detection.
In the knocking device disclosed by the embodiment of the application, the execution assembly is hinged with the base 100, the structure is simple and reliable, the knocking piece in the execution assembly is made of the silica gel sleeve 104 and the counterweight 105, and the mass production is convenient and quick and the cost is low. The reset element 110 is located at the hinge joint of the connecting part of the base 100 and the connecting part 106, and through high-precision matching of the sleeve 108, the bearing 109 and the torsion spring, the hinge joint is ensured to rotate smoothly, and meanwhile, collision noise cannot be generated due to gaps, so that signal acquisition is affected. In addition, the reset element 110 ensures that the knocking process can be successfully completed, and the execution of the whole knocking motion is not affected by the on-off of current. The electromagnet 101 is a power source of the whole knocking motion, after receiving current signals in different directions, the electromagnet 101 can push away and pull back the execution assembly, and the execution time of the whole knocking motion can be controlled according to the on-off time of the current. Meanwhile, the excitation force generated by the execution assembly is influenced by controlling the current, so that the knocking force is controlled, and the experimental study is convenient.
The terms first and second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A tapping device, comprising:
a base (100), wherein an electromagnet (101) is arranged on the base (100);
the execution assembly is hinged to the base (100) and used for executing knocking actions, a magnetic attraction piece (103) is arranged on the execution assembly, and the magnetic attraction piece (103) is matched with the electromagnet (101) so as to drive the execution assembly to move;
and the reset piece (110) is arranged between the execution assembly and the base (100) so as to reset the execution assembly to an initial position.
2. Tapping device according to claim 1, wherein the actuating assembly comprises a tapping member, the first end of which is provided with a connecting piece (106), the connecting piece (106) is provided with a connecting portion, and the connecting portion is hinged to the base (100) by means of a hinge.
3. Tapping device according to claim 2, characterized in that the second end of the tapping member is provided with a counterweight (105), the counterweight (105) being adapted to increase the tapping force of the tapping member.
4. A tapping device according to claim 3, characterized in that the tapping member is provided with a silica gel sleeve (104) for reducing the impact sound on the outside.
5. The knocking device according to claim 2, wherein said base (100) is provided with a hinge slot for mounting said hinge member, said hinge slot is provided with a support arm, and said support arm comprises a first support arm and a second support arm disposed opposite to said first support arm, a connection portion of said connection member (106) is disposed in said hinge slot, said hinge member sequentially passes through said first support arm, said connection portion of said connection member (106) and said second support arm, and said return member (110) is disposed in said hinge slot.
6. The knocking device according to claim 5, wherein said hinge member comprises a pin shaft (107) and a sleeve (108) sleeved outside said pin shaft (107), and said pin shaft (107) sequentially passes through said first support arm, said connecting portion of said connecting member (106), and said second support arm, said sleeve (108) is two, and said two sleeves (108) are respectively located between said connecting member (106) and said support arm, and a bearing (109) is provided between said sleeve (108) and said connecting member (106).
7. The knocking device according to claim 5, wherein said restoring member (110) is a torsion spring, and a connection portion of said connecting member (106) is provided with a mounting groove for mounting said restoring member (110).
8. Tapping device according to claim 1, characterized in that the base (100) is provided with a receiving groove, in which the electromagnet (101) is arranged.
9. Tapping device according to claim 1, characterized in that the magnetic attraction member (103) is a permanent magnet and that the magnetic attraction member (103) is arranged coaxially with the electromagnet (101).
10. Tapping device according to any one of claims 1-9, characterized in that a noise-reducing cotton pad (102) is arranged between the electromagnet (101) and the magnetic attraction member (103).
CN202310708516.0A 2023-06-14 2023-06-14 Knocking device Pending CN116698973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310708516.0A CN116698973A (en) 2023-06-14 2023-06-14 Knocking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310708516.0A CN116698973A (en) 2023-06-14 2023-06-14 Knocking device

Publications (1)

Publication Number Publication Date
CN116698973A true CN116698973A (en) 2023-09-05

Family

ID=87837037

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310708516.0A Pending CN116698973A (en) 2023-06-14 2023-06-14 Knocking device

Country Status (1)

Country Link
CN (1) CN116698973A (en)

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