Nondestructive testing device based on sound and vibration acquisition

Abstract

The invention discloses a nondestructive testing device based on sound and vibration collection, relates to the technical field of nondestructive testing, and adopts the technical scheme that the nondestructive testing device based on sound and vibration collection is characterized by comprising a box body, a force hammer arranged in the box body and an excitation structure of the force hammer; a hammer rod of the force hammer is rotationally arranged on the inner wall of the box body, the excitation structure can drive a hammer head of the force hammer to extend out of one side of the box body, and a beating opening allowing the hammer head to extend out is formed in the box body; and an acoustic vibration sensor is arranged on the box body and on the outer wall of the same side of the beating opening. The device has the beneficial effects that the force hammer, the excitation structure of the force hammer, the acoustic vibration sensor, the acquisition instrument and the computer are integrated together through the box body, so that the device is convenient to use and carry; the acoustic vibration sensor can realize the adjustment of the measurement angle through the rotation of the rotating structure; the height of each acoustic vibration sensor can be adjusted through a screw rod.

Description

Technical Field

[0001] The invention relates to the technical field of non-destructive testing, and in particular to a non-destructive testing device based on acoustic vibration collection. Background Art

[0002] FRP composite materials have many advantages such as light weight, high strength, corrosion resistance, good insulation, good thermal insulation, good designability, and excellent processability. They are widely used in the construction industry, petrochemical industry, transportation industry, electronic communications, and military industry. For example, FRP storage tanks have the advantages of reliable quality, safety, stability, and durability, and are widely used in oil fields. However, FRP composite materials will age after long-term use, resulting in poor impact resistance. Cracks and delamination damage often occur during use, causing the performance of the composite material structure to decline, which may cause significant economic losses in severe cases. Therefore, it is very necessary to conduct safety inspections during the application process.

[0003] At present, there are various non-destructive testing technologies for FRP composite materials, including X-ray inspection, ultrasonic inspection, magnetic particle inspection and liquid penetration inspection. In addition, since objects of different materials have different vibration characteristics and the vibration characteristics are closely related to the intrinsic quality of the objects. Therefore, the quality of objects can also be non-destructively tested through acoustic vibration testing technology. The basic principle of acoustic vibration testing technology is to vibrate the object under test by applying external audio vibration, measure the vibration characteristics of the object under test, and analyze its vibration state, such as amplitude, frequency, loss, vibration form, and force impedance related to the vibration mode of the object. Since they are all directly related to the structure and performance of the object under test, the intrinsic quality of the object under test can be judged accordingly. At present, the acoustic vibration testing equipment on the market, the vibration device and the signal receiving device are completely independent devices, which need to be installed separately during use, which is very inconvenient and difficult to carry. Summary of the invention

[0004] The purpose of the present invention is to provide a non-destructive testing device based on acoustic vibration collection.

[0005] The present invention is achieved by the following measures: a nondestructive testing device based on acoustic vibration collection, characterized in that it includes a box, a hammer arranged inside the box, and an excitation structure of the hammer; The hammer rod of the power hammer is rotatably arranged on the inner wall of the box body, the excitation structure can drive the hammer head of the power hammer to extend from one side of the box body, and the box body is provided with a striking opening allowing the hammer head to extend; An acoustic vibration sensor is arranged on the outer wall of the box body and on the same side as the striking opening.

[0006] The hammer is T-shaped and includes a hammer head and a hammer rod. A rotating shaft is fixedly arranged on the side wall of the hammer rod, and the rotating shaft is rotatably arranged on the inner wall of the box; The excitation structure includes a torsion spring rotatably arranged on the rotating shaft and a traction component that drives the hammer head to swing away from the striking opening.

[0007] The traction assembly includes a traction rope, a guide ring 1 and a guide ring 2 for guiding the traction rope, one end of the traction rope is located outside the box, and the other end passes through the guide ring 1 and the guide ring 2 in sequence to be connected to the hammer rod; The second guide ring is located between the hammer rod and the striking opening, and the first guide ring and the second guide ring are located on different sides of the hammer rod.

[0008] Pulling the outer end of the traction rope drives the hammer to swing toward the inside of the box. At this time, the torsion spring is compressed and in a state of storing force. Loosening the traction rope releases the torsion force, drives the hammer to swing toward the striking opening, and extends out of the striking opening to strike the object to be measured. Different striking forces are achieved according to the length of the traction rope. The traction rope is generally made of steel wire rope.

[0009] It also includes a rotating structure, one end of which is rotatably disposed on the box body and the rotating position is close to the striking opening; The acoustic vibration sensors are arranged in a plurality of equal distances and along the length direction of the rotating structure; Since the propagation distance of vibration signals in objects of different years of use is different, and the layout distance of acoustic vibration sensors will affect parameters such as signal propagation rate and amplitude, the layout distance between two adjacent acoustic vibration sensors is determined to be 20 cm through experiments, and the acoustic vibration sensors are placed in a straight line to reduce the impact of emission position and distance.

[0010] When the object to be measured is in a narrow position, the measuring angle of the acoustic vibration sensor can be changed by the rotating structure; the rotating structure is connected to the box body through a damping shaft, and the function of multi-directional measurement is realized under the action of the damping shaft.

[0011] The rotating shaft is rotatably arranged on the inner wall of the box body through a bracket, a bearing is arranged on the bracket, the rotating shaft is arranged on the bearing, and one end of the torsion spring is connected to the bracket; The rotating shaft is fixed to the hammer rod through an upper clamp, and the upper clamp is formed by connecting two semicircular clamping plates. The rotating shaft is fixedly arranged on the outer side wall of one semicircular clamping plate, and the other end of the torsion spring is arranged on the semicircular clamping plate on which the rotating shaft is installed.

[0012] The end of the hammer rod is provided with a lower clamp, and the inner end of the traction rope is connected to any semicircular clamp of the lower clamp. The traction rope is generally arranged on a semicircular clamp close to the second guide and a lifting ring for installing the traction rope is arranged on the semicircular clamp.

[0013] It also includes an adjustment structure for driving the acoustic vibration sensor to move back and forth along the axis direction of the acoustic vibration sensor, and the acoustic vibration sensor is slidably arranged on the box body.

[0014] It also includes an adjusting structure for driving the acoustic vibration sensor to reciprocate along the axial direction of the acoustic vibration sensor, and the acoustic vibration sensor is slidably arranged on the rotating structure.

[0015] The adjustment structure includes a screw rod rotatably arranged on the rotating structure, the screw rod corresponds to the acoustic vibration sensor one by one, an adjustment frame is arranged on the screw rod through a threaded connection, and the acoustic vibration sensor is fixed on the adjustment frame. When the screw rod rotates, the adjustment frame performs a linear motion along the axis direction of the acoustic vibration sensor. In the process of rotating the screw rod, the sensor is moved up and down through the transmission of the thread.

[0016] When the acoustic vibration sensor is arranged on the rotating structure, both angle adjustment and up and down movement can be achieved.

[0017] It also includes a limiting structure of the screw, the inner end of the screw extends out of the rotating structure and a rotating disk is provided at the extended end, a plurality of grooves are evenly distributed circumferentially on the surface opposite to the rotating disk and the rotating structure, and a plurality of spring pins that can be inserted into the grooves are provided on the rotating structure. The grooves are generally semicircular grooves, and the grooves are arranged in a circular array with the center of the knob as the center. The upper surface of the rotating structure has a hollow cylinder, and the spring pin is fixed in the hollow cylinder and the pin head of the spring pin is a sphere. By rotating the rotating disk, the grooves on the lower surface of the rotating disk are alternately contacted with the pin head of the spring pin, and the function of rotation stop is realized under the action of the spring.

[0018] The box is also provided with a collector for receiving the acoustic vibration sensor signal and a computer for receiving, processing, storing and displaying the output signal of the collector. The acoustic vibration sensor is connected to the collector via a signal line, and the collector is connected to the computer via an Ethernet line.

[0019] Furthermore, the front and left sides of the box shell are provided with two battery slots for placing portable lithium batteries. The portable batteries are used to power the device, and respectively power the acoustic vibration sensor, the collector and the computer.

[0020] Working principle: The hammer strikes the object to be measured to generate vibration by exciting the structure, and the acoustic vibration sensor detects the vibration signal, which is transmitted to the computer through the acquisition instrument for processing, storage and display.

[0021] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are: the present application integrates the force hammer, the excitation structure of the force hammer, the acoustic vibration sensor, the collector and the computer through a box, which is easy to use and carry; the acoustic vibration sensor can adjust the measurement angle by rotating the rotating structure; and each acoustic vibration sensor can also adjust the height of each acoustic vibration sensor through a screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings used in the embodiments. Obviously, the drawings listed below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention (the rotating structure is rotated out); Figure 2 is a schematic diagram of the bottom structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure inside the box; Figure 4 yes Figure 3 A partial enlarged view of the middle A; Figure 5 is with Figure 4 Schematic diagram of the structure at different angles; Figure 6 yes Figure 5 A partial enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the structure inside the rotating structure; Figure 8 yes Figure 7 A partial enlarged view of point C in the middle; Fig. 9 It is a structural diagram of the cover.

[0024] In the accompanying drawings, the components represented by each number are listed as follows: 1. Box body; 2. Hammer; 3. Excitation structure; 4. Rotating structure; 5. Acoustic vibration sensor; 6. Bracket; 7. Adjustment structure; 9. Collector; 10. Computer; 11. Damping shaft; 12. Spring pin; 101. Battery slot; 102. Inner wall of box body; 103. Striking port; 104. Lead-out port; 201. Hammer rod; 202. Hammer head; 301. Traction rope; 302. Guide ring 1; 303. Torsion spring; 304. Guide ring 2; 401. Bottom plate; 402. Cover plate; 403. Protective plate; 601. Upper clamp; 602. Lower clamp; 701. Screw; 702. Adjustment frame; 703. Fixing part; 705. Rotating disk. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0026] Embodiment 1: See also Figure 1-Figure 9 , a nondestructive testing device based on acoustic vibration collection, characterized in that it includes a box body 1, a hammer 2 arranged inside the box body 1, and an excitation structure 3 of the hammer 2; The hammer rod 201 of the power hammer 2 is rotatably arranged on the inner wall 102 of the box body, and the excitation structure 3 can drive the hammer head 202 of the power hammer 2 to extend from one side of the box body 1. The box body 1 is provided with a striking opening 103 for allowing the hammer head 202 to extend; An acoustic vibration sensor 5 is provided on the outer wall of the box body 1 on the same side as the striking opening 103 .

[0027] A rotating shaft is fixedly arranged on the side wall of the hammer rod 201, and the rotating shaft is rotatably arranged on the inner wall 102 of the box body; The exciting structure 3 includes a torsion spring 303 rotatably disposed on a rotating shaft and a traction component that drives the hammer head 202 to swing away from the striking opening 103 .

[0028] The traction assembly includes a traction rope 301, a guide ring 1 302 and a guide ring 2 304 for guiding the traction rope 301. One end of the traction rope 301 is located outside the box 1, and the other end passes through the guide ring 1 302 and the guide ring 2 304 in sequence to be connected to the hammer rod 201. The box 1 is provided with an outlet 104 for the traction rope 301.

[0029] The second guide ring 304 is located between the hammer rod 201 and the striking opening 103 , and the first guide ring 302 and the second guide ring 304 are located on different sides of the hammer rod 201 .

[0030] Pulling the outer end of the traction rope 301 drives the hammer 202 to swing toward the inside of the box 1. At this time, the torsion spring 303 is compressed and in a state of storing force. When the traction rope 301 is loosened, the torsion spring 303 releases the torsion force, drives the hammer 202 to swing toward the striking opening 103, and extends out of the striking opening 103 to strike the object to be measured; different striking forces are achieved according to the length of the traction rope 301. The traction rope 301 is generally made of steel wire rope.

[0031] The rotating shaft is rotatably arranged on the inner wall 102 of the box through the bracket 6, a bearing is arranged on the bracket 6, the rotating shaft is arranged on the bearing, and one end of the torsion spring 303 is connected to the bracket 6; The rotating shaft is fixed on the hammer rod 201 through an upper clamp 601. The upper clamp 601 is formed by connecting two semicircular clamps. The rotating shaft is fixedly arranged on the outer wall of one semicircular clamp. The other end of the torsion spring 303 is arranged on the semicircular clamp on which the rotating shaft is installed.

[0032] The end of the hammer rod 201 is provided with a lower clamp 602, and the inner end of the traction rope 301 is connected to any semicircular clamp of the lower clamp 602. The traction rope 301 is generally arranged on a semicircular clamp close to the second guide and a lifting ring for installing the traction rope 301 is arranged on the semicircular clamp.

[0033] The box 1 is also provided with a collector 9 for receiving signals from the acoustic vibration sensor 5 and a computer 10 for receiving, processing, storing and displaying output signals from the collector 9. The acoustic vibration sensor 5 is connected to the collector 9 via a signal line, and the collector 9 is connected to the computer 10 via an Ethernet line.

[0034] The computer 10 has four mounting holes on both sides. The mounting parts are inserted into the mounting holes and then connected to the upper plate through bolts. The upper plate is mounted on the upper side of the outer shell of the box body 1.

[0035] The front and left sides of the housing 1 are provided with two battery slots 101 for placing portable lithium batteries. The portable batteries are used to power the equipment, and respectively power the acoustic vibration sensor 5, the collector 9 and the computer 10.

[0036] Embodiment 2: See also Figure 1-Figure 9 , based on the first embodiment, further comprising a rotating structure, one end of which is rotatably disposed on the box body 1 and the rotating position is close to the striking opening 103; A plurality of acoustic vibration sensors 5 are equidistantly arranged along the length direction of the rotating structure; Since the propagation distances of vibration signals in objects of different service years are different, and the arrangement distance of the acoustic vibration sensor 5 will affect parameters such as the signal propagation rate and amplitude, it is determined through experiments that the arrangement distance between two adjacent acoustic vibration sensors 5 is 20 cm, and the acoustic vibration sensors 5 are placed in a straight line to reduce the impact of the emission position and distance.

[0037] When the object to be measured is in a narrow position, the measuring angle of the acoustic vibration sensor 5 can be changed by the rotating structure; the rotating structure is connected to the box body 1 through a damping shaft, and the function of multi-directional measurement is realized under the action of the damping shaft.

[0038] Embodiment three: On the basis of the second embodiment, it further comprises an adjusting structure 7 for driving the acoustic vibration sensor 5 to reciprocate along the axis direction of the acoustic vibration sensor 5 , and the acoustic vibration sensor 5 is slidably arranged on the rotating structure.

[0039] The adjustment structure 7 includes a screw 701 rotatably arranged on the rotating structure, the screw 701 corresponds to the acoustic vibration sensor 5 one by one, an adjustment frame 702 is arranged on the screw 701 through a threaded connection, and the acoustic vibration sensor 5 is fixed on the adjustment frame 702 through a fixing member 703, and the fixing member 703 can be a clamp. When the screw 701 rotates, the adjustment frame 702 performs a linear motion along the axis direction of the acoustic vibration sensor 5. In the process of rotating the screw 701, the sensor is moved up and down through the transmission of the thread.

[0040] When the acoustic vibration sensor 5 is arranged on the rotating structure, both angle adjustment and up and down movement can be achieved.

[0041] It also includes a limiting structure of the screw 701, the inner end of the screw 701 extends out of the rotating structure and a rotating disk 705 is provided at the extended end, a plurality of grooves are evenly distributed circumferentially on the surface opposite to the rotating structure of the rotating disk 705, and a plurality of spring pins 12 that can be inserted into the grooves are provided on the rotating structure. The grooves are generally semicircular grooves, and the grooves are arranged in a circular array with the center of the knob as the center of the circle. The upper surface of the rotating structure has a hollow cylinder, and the spring pin 12 is fixed in the hollow cylinder and the pin head of the spring pin 12 is a sphere. By rotating the rotating disk 705, the grooves on the lower surface of the rotating disk 705 are alternately contacted with the pin head of the spring pin 12, and the function of rotating and stopping is realized under the action of the spring.

[0042] The rotating structure includes a bottom plate 401 and a cover plate 402 which are parallel to each other. One end of the bottom plate 401 is rotatably set on the box body 1 through the damping shaft 11. The bottom plate 401 is provided with a mounting hole for the acoustic vibration sensor 5. The screw rod 701 is rotatably set on the bottom plate 401. The other end of the screw rod 701 extends out of the cover plate 402 and is provided with a rotating disk 705. The bottom plate 401 and the cover plate 402 are connected by protective plates 403 on all sides.

[0043] Embodiment 4: See also Figure 1-Figure 9 , a nondestructive testing device based on acoustic vibration collection, characterized in that it includes a box body 1, a hammer 2 arranged inside the box body 1, and an excitation structure 3 of the hammer 2; The hammer rod 201 of the power hammer 2 is rotatably arranged on the inner wall 102 of the box body, and the excitation structure 3 can drive the hammer head 202 of the power hammer 2 to extend from one side of the box body 1. The box body 1 is provided with a striking opening 103 for allowing the hammer head 202 to extend; An acoustic vibration sensor 5 is provided on the outer wall of the box body 1 on the same side as the striking opening 103 .

[0044] A rotating shaft is fixedly arranged on the side wall of the hammer rod 201, and the rotating shaft is rotatably arranged on the inner wall 102 of the box body; The exciting structure 3 includes a torsion spring 303 rotatably disposed on a rotating shaft and a traction component that drives the hammer head 202 to swing away from the striking opening 103 .

[0045] The traction assembly includes a traction rope 301, a guide ring 1 302 and a guide ring 2 304 for guiding the traction rope 301, one end of the traction rope 301 is located outside the box 1, and the other end passes through the guide ring 1 302 and the guide ring 2 304 in sequence to be connected to the hammer rod 201; The second guide ring 304 is located between the hammer rod 201 and the striking opening 103 , and the first guide ring 302 and the second guide ring 304 are located on different sides of the hammer rod 201 .

[0046] Pulling the outer end of the traction rope 301 drives the hammer 202 to swing toward the inside of the box 1. At this time, the torsion spring 303 is compressed and in a state of storing force. When the traction rope 301 is loosened, the torsion spring 303 releases the torsion force, drives the hammer 202 to swing toward the striking opening 103, and extends out of the striking opening 103 to strike the object to be measured; different striking forces are achieved according to the length of the traction rope 301. The traction rope 301 is generally made of steel wire rope.

[0047] It also includes a rotating structure, one end of which is rotatably disposed on the box body 1 and the rotating position is close to the striking opening 103; A plurality of acoustic vibration sensors 5 are equidistantly arranged along the length direction of the rotating structure; Since the propagation distances of vibration signals in objects of different service years are different, and the arrangement distance of the acoustic vibration sensor 5 will affect parameters such as the signal propagation rate and amplitude, it is determined through experiments that the arrangement distance between two adjacent acoustic vibration sensors 5 is 20 cm, and the acoustic vibration sensors 5 are placed in a straight line to reduce the impact of the emission position and distance.

[0048] When the object to be measured is in a narrow position, the measuring angle of the acoustic vibration sensor 5 can be changed by the rotating structure; the rotating structure is connected to the box body 1 through a damping shaft, and the function of multi-directional measurement is realized under the action of the damping shaft.

[0049] The rotating shaft is rotatably arranged on the inner wall 102 of the box through the bracket 6, a bearing is arranged on the bracket 6, the rotating shaft is arranged on the bearing, and one end of the torsion spring 303 is connected to the bracket 6; The rotating shaft is fixed on the hammer rod 201 through an upper clamp 601. The upper clamp 601 is formed by connecting two semicircular clamps. The rotating shaft is fixedly arranged on the outer wall of one semicircular clamp. The other end of the torsion spring 303 is arranged on the semicircular clamp on which the rotating shaft is installed.

[0050] The end of the hammer rod 201 is provided with a lower clamp 602, and the inner end of the traction rope 301 is connected to any semicircular clamp of the lower clamp 602. The traction rope 301 is generally arranged on a semicircular clamp close to the second guide and a lifting ring for installing the traction rope 301 is arranged on the semicircular clamp.

[0051] It also includes an adjustment structure 7 for driving the acoustic vibration sensor 5 to reciprocate along the axis direction of the acoustic vibration sensor 5 , and the acoustic vibration sensor 5 is slidably arranged on the box body 1 .

[0052] The adjustment structure 7 includes a screw rod 701 rotatably arranged on the box body 1, the screw rod 701 corresponds to the acoustic vibration sensor 5 one by one, an adjustment frame 702 is arranged on the screw rod 701 through a threaded connection, and the acoustic vibration sensor 5 is fixed on the adjustment frame 702. When the screw rod 701 rotates, the adjustment frame 702 performs a linear motion along the axis direction of the acoustic vibration sensor 5. In the process of rotating the screw rod 701, the sensor is moved up and down through the transmission of the thread.

[0053] It also includes a limiting structure of the screw 701, the inner end of the screw 701 extends out of the rotating structure and a rotating disk 705 is provided at the extended end, a plurality of grooves are evenly distributed circumferentially on the surface opposite to the rotating structure of the rotating disk 705, and a plurality of spring pins 12 that can be inserted into the grooves are provided on the rotating structure. The grooves are generally semicircular grooves, and the grooves are arranged in a circular array with the center of the knob as the center of the circle. The upper surface of the rotating structure has a hollow cylinder, and the spring pin 12 is fixed in the hollow cylinder and the pin head of the spring pin 12 is a sphere. By rotating the rotating disk 705, the grooves on the lower surface of the rotating disk 705 are alternately contacted with the pin head of the spring pin 12, and the function of rotating and stopping is realized under the action of the spring.

[0054] The box 1 is also provided with a collector 9 for receiving signals from the acoustic vibration sensor 5 and a computer 10 for receiving, processing, storing and displaying output signals from the collector 9. The acoustic vibration sensor 5 is connected to the collector 9 via a signal line, and the collector 9 is connected to the computer 10 via an Ethernet line.

[0055] Furthermore, the front and left sides of the housing 1 are provided with two battery slots 101 for placing portable lithium batteries, and the portable batteries are used to power the device, and respectively power the acoustic vibration sensor 5, the collector 9 and the computer 10.

[0056] Working principle: The hammer 2 strikes the object to be measured to generate vibration by exciting the structure 3. The acoustic vibration sensor 5 detects the vibration signal and transmits it to the computer 10 through the acquisition device 9 for processing, storage and display.

[0057] Embodiment five: See also Figure 1-Figure 9 A nondestructive testing device based on acoustic vibration collection, characterized in that it includes a box body 1, a rotating structure and an acoustic vibration sensor 5, one end of the rotating structure is rotatably arranged on the box body 1; a plurality of acoustic vibration sensors 5 are equidistantly arranged and arranged along the length direction of the rotating structure; Since the propagation distances of vibration signals in objects of different service years are different, and the arrangement distance of the acoustic vibration sensor 5 will affect parameters such as the signal propagation rate and amplitude, it is determined through experiments that the arrangement distance between two adjacent acoustic vibration sensors 5 is 20 cm, and the acoustic vibration sensors 5 are placed in a straight line to reduce the impact of the emission position and distance.

[0058] When the object to be measured is in a narrow position, the measuring angle of the acoustic vibration sensor 5 can be changed by the rotating structure. The rotating structure is connected to the box body 1 through a damping shaft, and the function of multi-directional measurement is realized under the action of the damping shaft.

[0059] It also includes an adjusting structure 7 for driving the acoustic vibration sensor 5 to reciprocate along the axis direction of the acoustic vibration sensor 5 , and the acoustic vibration sensor 5 is slidably arranged on the rotating structure.

[0060] The adjustment structure 7 includes a screw rod 701 rotatably arranged on the rotating structure, the screw rod 701 corresponds to the acoustic vibration sensor 5 one by one, an adjustment frame 702 is arranged on the screw rod 701 through a threaded connection, and the acoustic vibration sensor 5 is fixed on the adjustment frame 702. When the screw rod 701 rotates, the adjustment frame 702 performs a linear motion along the axis direction of the acoustic vibration sensor 5. In the process of rotating the screw rod 701, the sensor is moved up and down through the transmission of the thread.

[0061] It also includes a limiting structure of the screw 701, the inner end of the screw 701 extends out of the rotating structure and a rotating disk 705 is provided at the extended end, a plurality of grooves are evenly distributed circumferentially on the surface opposite to the rotating structure of the rotating disk 705, and a plurality of spring pins 12 that can be inserted into the grooves are provided on the rotating structure. The grooves are generally semicircular grooves, and the grooves are arranged in a circular array with the center of the knob as the center of the circle. The upper surface of the rotating structure has a hollow cylinder, and the spring pin 12 is fixed in the hollow cylinder and the pin head of the spring pin 12 is a sphere. By rotating the rotating disk 705, the grooves on the lower surface of the rotating disk 705 are alternately contacted with the pin head of the spring pin 12, and the function of rotating and stopping is realized under the action of the spring.

[0062] The box 1 is also provided with a collector 9 for receiving signals from the acoustic vibration sensor 5 and a computer 10 for receiving, processing, storing and displaying output signals from the collector 9. The acoustic vibration sensor 5 is connected to the collector 9 via a signal line, and the collector 9 is connected to the computer 10 via an Ethernet line.

[0063] Furthermore, the front and left sides of the housing 1 are provided with two battery slots 101 for placing portable lithium batteries, and the portable batteries are used to power the device, and respectively power the acoustic vibration sensor 5, the collector 9 and the computer 10.

[0064] It also includes a striking mechanism, which uses the existing technology, and can also use the hammer 2 used in this embodiment, specifically: the hammer 2 and the excitation structure 3 of the hammer 2 are arranged inside the box 1; The hammer rod 201 of the power hammer 2 is rotatably arranged on the inner wall 102 of the box body, and the excitation structure 3 can drive the hammer head 202 of the power hammer 2 to extend from one side of the box body 1. The box body 1 is provided with a striking opening 103 for allowing the hammer head 202 to extend; An acoustic vibration sensor 5 is provided on the outer wall of the box body 1 on the same side as the striking opening 103 .

[0065] A rotating shaft is fixedly arranged on the side wall of the hammer rod 201, and the rotating shaft is rotatably arranged on the inner wall 102 of the box body; The exciting structure 3 includes a torsion spring 303 rotatably disposed on a rotating shaft and a traction component that drives the hammer head 202 to swing away from the striking opening 103 .

[0066] The traction assembly includes a traction rope 301, a guide ring 1 302 and a guide ring 2 304 for guiding the traction rope 301, one end of the traction rope 301 is located outside the box 1, and the other end passes through the guide ring 1 302 and the guide ring 2 304 in sequence to be connected to the hammer rod 201; The second guide ring 304 is located between the hammer rod 201 and the striking opening 103 , and the first guide ring 302 and the second guide ring 304 are located on different sides of the hammer rod 201 .

[0067] Pulling the outer end of the traction rope 301 drives the hammer 202 to swing toward the inside of the box 1. At this time, the torsion spring 303 is compressed and in a state of storing force. When the traction rope 301 is loosened, the torsion spring 303 releases the torsion force, drives the hammer 202 to swing toward the striking opening 103, and extends out of the striking opening 103 to strike the object to be measured; different striking forces are achieved according to the length of the traction rope 301. The traction rope 301 is generally made of steel wire rope.

[0068] Embodiment six: See also Figure 1-Figure 9 , a striking device, characterized in that it comprises a box body 1, a hammer 2 arranged inside the box body 1 and an excitation structure 3 of the hammer 2; The hammer rod 201 of the power hammer 2 is rotatably arranged on the inner wall 102 of the box body, and the excitation structure 3 can drive the hammer head 202 of the power hammer 2 to extend from one side of the box body 1. The box body 1 is provided with a striking opening 103 for allowing the hammer head 202 to extend; A rotating shaft is fixedly arranged on the side wall of the hammer rod 201, and the rotating shaft is rotatably arranged on the inner wall 102 of the box body; The exciting structure 3 includes a torsion spring 303 rotatably disposed on a rotating shaft and a traction component that drives the hammer head 202 to swing away from the striking opening 103 .

[0069] The traction assembly includes a traction rope 301, a guide ring 1 302 and a guide ring 2 304 for guiding the traction rope 301, one end of the traction rope 301 is located outside the box 1, and the other end passes through the guide ring 1 302 and the guide ring 2 304 in sequence to be connected to the hammer rod 201; The second guide ring 304 is located between the hammer rod 201 and the striking opening 103 , and the first guide ring 302 and the second guide ring 304 are located on different sides of the hammer rod 201 .

[0070] Pulling the outer end of the traction rope 301 drives the hammer 202 to swing toward the inside of the box 1. At this time, the torsion spring 303 is compressed and in a state of storing force. When the traction rope 301 is loosened, the torsion spring 303 releases the torsion force, drives the hammer 202 to swing toward the striking opening 103, and extends out of the striking opening 103 to strike the object to be measured; different striking forces are achieved according to the length of the traction rope 301. The traction rope 301 is generally made of steel wire rope.

[0071] The rotating shaft is rotatably arranged on the inner wall 102 of the box through the bracket 6, a bearing is arranged on the bracket 6, the rotating shaft is arranged on the bearing, and one end of the torsion spring 303 is connected to the bracket 6; The rotating shaft is fixed on the hammer rod 201 through an upper clamp 601. The upper clamp 601 is formed by connecting two semicircular clamps. The rotating shaft is fixedly arranged on the outer wall of one semicircular clamp. The other end of the torsion spring 303 is arranged on the semicircular clamp on which the rotating shaft is installed.

[0072] The end of the hammer rod 201 is provided with a lower clamp 602, and the inner end of the traction rope 301 is connected to any semicircular clamp of the lower clamp 602. The traction rope 301 is generally arranged on a semicircular clamp close to the second guide and a lifting ring for installing the traction rope 301 is arranged on the semicircular clamp.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nondestructive testing device based on acoustic vibration collection, characterized in that: It comprises a box body, a hammer arranged inside the box body and an excitation structure of the hammer; The hammer rod of the power hammer is rotatably arranged on the inner wall of the box body, the excitation structure can drive the hammer head of the power hammer to extend from one side of the box body, and the box body is provided with a striking opening allowing the hammer head to extend; An acoustic vibration sensor is arranged on the outer wall of the box body and on the same side as the striking opening.

2. The nondestructive testing device based on acoustic vibration collection according to claim 1 is characterized in that: A rotating shaft is fixedly arranged on the side wall of the hammer rod, and the rotating shaft is rotatably arranged on the inner wall of the box body; The excitation structure includes a torsion spring rotatably arranged on the rotating shaft and a traction component that drives the hammer head to swing away from the striking opening.

3. The nondestructive testing device based on acoustic vibration collection according to claim 2 is characterized in that: The traction assembly includes a traction rope, a guide ring 1 and a guide ring 2 for guiding the traction rope, one end of the traction rope is located outside the box, and the other end passes through the guide ring 1 and the guide ring 2 in sequence to be connected to the hammer rod; The second guide ring is located between the hammer rod and the striking opening, and the first guide ring and the second guide ring are located on different sides of the hammer rod.

4. The nondestructive testing device based on acoustic vibration collection according to claim 1 is characterized in that: It also includes a rotating structure, one end of which is rotatably disposed on the box body and the rotating position is close to the striking opening; A plurality of acoustic vibration sensors are equidistantly arranged and arranged along the length direction of the rotating structure.

5. The nondestructive testing device based on acoustic vibration collection according to claim 2 is characterized in that: The rotating shaft is rotatably arranged on the inner wall of the box through a bracket, a bearing is arranged on the bracket, the rotating shaft is arranged on the bearing, and one end of the torsion spring is connected to the bracket; The rotating shaft is fixed to the hammer rod through an upper clamp, and the upper clamp is formed by connecting two semicircular clamping plates. The rotating shaft is fixedly arranged on the outer side wall of one semicircular clamping plate, and the other end of the torsion spring is arranged on the semicircular clamping plate on which the rotating shaft is installed.

6. The nondestructive testing device based on acoustic vibration collection according to claim 1 is characterized in that: It also includes an adjustment structure for driving the acoustic vibration sensor to move back and forth along the axis direction of the acoustic vibration sensor, and the acoustic vibration sensor is slidably arranged on the box body.

7. The nondestructive testing device based on acoustic vibration collection according to claim 4 is characterized in that: It also includes an adjusting structure for driving the acoustic vibration sensor to reciprocate along the axial direction of the acoustic vibration sensor, and the acoustic vibration sensor is slidably arranged on the rotating structure.

8. The nondestructive testing device based on acoustic vibration collection according to claim 7 is characterized in that: The adjustment structure comprises a screw rod rotatably arranged on the rotating structure, the screw rod corresponds to the acoustic vibration sensor one by one, an adjustment frame is arranged on the screw rod through a threaded connection, and the acoustic vibration sensor is fixed on the adjustment frame.

9. The nondestructive testing device based on acoustic vibration collection according to claim 8, characterized in that: It also includes a limiting structure for the screw, wherein the inner end of the screw extends out of the rotating structure and a rotating disk is provided at the protruding end, a plurality of grooves are evenly distributed circumferentially on the opposite surface of the rotating disk and the rotating structure, and a plurality of spring pins that can be inserted into the grooves are provided on the rotating structure.

10. A striking device, characterized in that it comprises a box, a hammer arranged inside the box, and an excitation structure of the hammer; The hammer rod of the power hammer is rotatably arranged on the inner wall of the box body, and the excitation structure can drive the hammer head of the power hammer to extend from one side of the box body. The box body is provided with a striking opening allowing the hammer head to extend.

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