Ultrasonic detection scanning device

Abstract

An ultrasonic detection scanning device is used for detecting the periphery of a lug hole in a lug and comprises a first probe for emitting ultrasonic waves, a second probe for receiving the ultrasonic waves and a rotating mechanism, and the first probe and the second probe can rotate around the lug hole in the axial direction through the rotating mechanism. The first probe and the second probe can be configured to clamp the lug hole in the axial direction and enable ultrasonic waves to propagate in the lug near the periphery of the lug hole.

Description

Technical Field

[0001] The present invention relates to an ultrasonic detection scanning device. Background Art

[0002] The connecting piece of the lug structure is an important part of the mechanical connection system on an aircraft. It is provided with a lug hole for inserting a bolt or a pin shaft to cooperate in transmitting loads, connecting different components or realizing the hinged function of a movable structure. During the long-term service of the aircraft, fretting wear and stress concentration phenomena will occur around the lug hole, resulting in its failure and fracture. Due to the complex working load characteristics of the lug and its important position in the aircraft connection structure, the crack detection around the lug hole is crucial for ensuring the structural integrity and flight safety of the aircraft.

[0003] Currently, for fatigue cracks initiated at the edge or wall of the lug hole, the pulse echo ultrasonic detection technique is usually adopted. During the detection process, the ultrasonic probe is placed on the lug arc surface and the sound beam is incident at a certain angle. The crystal in the probe emits ultrasonic waves and receives the echo signals. When the ultrasonic waves encounter an interface of different media caused by defects such as cracks during propagation, reflection will occur and can be received by the probe. The reflected wave (defect wave) caused by the defect is displayed as a specific waveform on the ultrasonic detection instrument, thereby realizing the detection of cracks.

[0004] In the above-mentioned pulse echo ultrasonic detection, when the probe does not receive the defect wave, it is usually impossible to determine whether there is no defect or the distribution of the defect cannot make the defect wave be received by the probe. Therefore, the stable entry of ultrasonic energy into the workpiece and the selection of the incident angle of the ultrasonic waves are the keys to whether such ultrasonic detection signals can be received by the probe and displayed on the ultrasonic detection instrument, and factors such as the curvature of the lug, the radian range of the lug hole, the position and direction of crack initiation need to be considered. In this regard, in the current pulse echo ultrasonic detection, usually multiple probes are equipped for detecting a lug hole to be detected. Nevertheless, there are still cases where some positions of the lug hole cannot be scanned, and it is impossible to achieve 360° full coverage scanning around the lug hole, resulting in potential safety hazards caused by undetected cracks and other defects. Summary of the Invention

[0005] The present invention is completed in view of the above problems, and the purpose is to provide an ultrasonic detection scanning device for lugs that can achieve 360° scanning around the lug hole.

[0006] To achieve the above object, the present invention provides an ultrasonic detection and scanning device for detecting the periphery of an ear hole on an ear piece. The ultrasonic detection and scanning device includes: a first probe that emits ultrasonic waves; a second probe that receives the ultrasonic waves; and a rotation mechanism. The first probe and the second probe can rotate around the axis of the ear hole through the rotation mechanism for a full circle. The first probe and the second probe can be configured in the following state: sandwiching the ear hole in the axial direction and allowing the ultrasonic waves to propagate near the periphery of the ear hole within the ear piece.

[0007] The ultrasonic detection and scanning device according to the present invention includes two probes respectively for emitting and receiving ultrasonic waves, and uses a rotation mechanism to enable the first probe and the second probe to rotate around the axis of the ear hole for a full circle. The two probes are arranged on both sides of the ear piece along the axis of the ear hole, and the ultrasonic waves emitted by one probe can pass through the periphery of the edge of the ear hole within the ear piece and be received by the other probe. Thus, when the ultrasonic waves pass near the periphery of the ear hole, in the case of defects, the ultrasonic waves will be reflected and refracted. Compared with the case without defects, the acoustic wave signals received by the receiving probe will attenuate or even disappear. Therefore, without considering the propagation direction and position of defects such as cracks, it is possible to accurately judge whether there are defects through the received acoustic wave signals, improving the detection accuracy, and can simply achieve full coverage detection of 360° around the ear hole by rotating the two probes, avoiding potential safety hazards caused by undetected defects and improving the detection efficiency. At the same time, in the ultrasonic detection and scanning device of the present invention, only two general - specification probes need to be configured, without the need to configure multiple special probes for different regions of the ear piece, saving the detection cost.

[0008] In addition, in the ultrasonic detection and scanning device of the present invention, preferably, it further includes a support mechanism for supporting the rotation mechanism on the ear piece.

[0009] In addition, in the ultrasonic detection and scanning device of the present invention, preferably, it further includes a positioning mechanism provided on the rotation mechanism and capable of maintaining the first probe and the second probe in the above - mentioned state.

[0010] In addition, in the ultrasonic detection and scanning device of the present invention, preferably, the rotation mechanism includes a bearing and a sleeve. The sleeve rotates integrally with the inner ring of the bearing, and the outer ring of the bearing is supported on the ear piece via the support mechanism.

[0011] In addition, in the ultrasonic detection scanning device of the present invention, preferably, the positioning mechanism includes a rocker arm, a ring, and a probe clamp. The ring is integrally formed with the rocker arm, sleeved on the sleeve, and can rotate or move relative to the sleeve. The probe clamp holds the first probe or the second probe, is arranged on the rocker arm, and can rotate relative to the rocker arm.

[0012] For the ultrasonic detection scanning device with the above structure, by moving or rotating the rocker arm or the ring, and rotating the probe clamp, the two probes are positioned in a state capable of detecting defects near the periphery of the lug hole, and the two probes are rotated around the axis of the lug hole via the bearing and the sleeve, so as to achieve a full coverage detection of 360° around the periphery of the lug hole by using the two probes.

[0013] In addition, in the ultrasonic detection scanning device of the present invention, preferably, the supporting mechanism includes an airbag for abutting against the inner peripheral surface of the lug hole by inflating.

[0014] For the ultrasonic detection scanning device with the above structure, the device is supported on the lug by inflating the airbag, so that the device can be installed on various lugs with different lug hole diameters, saving the device cost, and the device can be simply installed by inflating and deflating, improving the operation efficiency.

[0015] In addition, in the ultrasonic detection scanning device of the present invention, preferably, the first probe and the second probe can rotate around the axis for a full circle while maintaining the state.

[0016] For the ultrasonic detection scanning device with the above structure, it can rotate around the axis of the lug hole for a full circle while the states of the two probes remain unchanged, so that the full coverage detection of 360° around the periphery of the lug hole can be achieved by rotating the two probes only by determining the states of the two probes once, improving the detection efficiency.

[0017] In addition, in the ultrasonic detection scanning device of the present invention, preferably, it further includes an ultrasonic detection instrument, and the ultrasonic detection instrument can show the acoustic wave signal of the ultrasonic wave received by the second probe.

[0018] (Advantages of the Invention)

[0019] According to the ultrasonic detection and scanning device of the present invention, two ultrasonic probes configured in a one-transmission-and-one-reception manner are arranged to sandwich the lug hole on the lug along the axial direction of the lug hole, and the emitted ultrasonic waves are made to propagate near the periphery of the lug hole within the lug. Moreover, the first probe and the second probe are enabled to rotate a full circle around the axial direction of the lug hole. Thus, when the ultrasonic waves pass near the periphery of the lug hole, in the case of a defect, the ultrasonic waves will be reflected and refracted. Compared with the case without a defect, the acoustic wave signals received by the probe for receiving ultrasonic waves will attenuate or even disappear. Therefore, without considering the propagation direction and position of defects such as cracks, it is possible to accurately determine whether there are defects through the received acoustic wave signals, and it is possible to simply achieve full coverage detection of 360° around the lug hole by rotating the two probes, avoiding potential safety hazards caused by defects that cannot be scanned, and improving the detection accuracy and detection efficiency. At the same time, in the ultrasonic detection and scanning device of the present invention, only two probes of the same specification need to be configured, and there is no need to configure multiple dedicated probes for different regions of the lug, saving the cost of detection. In addition, after the two probes are configured in a suitable state, there is no need to adjust the state of the probes again during the rotation process, and full coverage detection around the lug hole can be simply achieved. Description of the Drawings

[0020] Figure 1 It is a schematic diagram showing the ultrasonic detection and scanning device according to an embodiment of the present invention.

[0021] Figure 2 It is a view of the ultrasonic detection and scanning device according to an embodiment of the present invention as observed along the rotation axis of the bearing.

[0022] Figure 3 It is a cross-sectional view of the sleeve according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram showing the lug equipped with the ultrasonic detection and scanning device according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram showing the lug equipped with the ultrasonic detection and scanning device according to an embodiment of the present invention as observed along the axial direction of the lug hole.

[0025] Figure 6 It is a schematic diagram for explaining the propagation mode of ultrasonic waves.

[0026] (Symbol Description)

[0027] 1 Bearing;

[0028] 2 Airbag;

[0029] 3 Sleeve;

[0030] 31 Large-diameter part;

[0031] 32 Small-diameter part;

[0032] 4 Rocker arm;

[0033] 5 Probe clamp;

[0034] 6 Air pipe;

[0035] 7 Air compression device;

[0036] 8 Ring;

[0037] 9 Rotating shaft;

[0038] 10 First probe;

[0039] 11 Second probe;

[0040] 12 Lobe;

[0041] 13 Lobe hole. Specific implementation mode

[0042] Next, with reference to the drawings, the ultrasonic detection and scanning device (hereinafter sometimes simply referred to as the lobe detection device) according to the embodiment of the present invention for detecting the situation around the lobe hole 13 on the lobe 12 will be described. Hereinafter, for the sake of convenience of description, the thickness direction of the lobe 12 is sometimes referred to as the up and down direction.

[0043] Figure 1 、 Figure 2 is a schematic diagram showing the structure of the lobe detection device of the present embodiment. As Figure 1 、 Figure 2 shown, the lobe detection device of the present embodiment includes a rotating mechanism, a supporting mechanism, a positioning mechanism, and a probe (not shown).

[0044] The rotating mechanism of the present embodiment includes a bearing 1 and a sleeve 3. The bearing 1 is, for example, a rolling bearing including an outer ring, an inner ring, and rolling elements between the outer ring and the inner ring. When the outer ring is fixed in a non-rotatable manner, for example, the inner ring can rotate relative to the outer ring. In addition, the diameter of the outer ring of the bearing 1 is formed to be smaller than the diameter of the lobe hole 13 to be detected.

[0045] Figure 3 is a cross-sectional view of the sleeve 3. The sleeve 3 is made of, for example, a metal with good elasticity, and its overall shape is cylindrical. As Figure 3 shown, the sleeve 3 is formed with a large-diameter portion 31 and a small-diameter portion 32 along its extending direction. The outer diameter of the large-diameter portion 31 is close to the inner diameter of the inner ring of the bearing 1. When installing the lobe detection device of the present embodiment, the sleeve 3 is assembled and fixed to the bearing 1 in such a way that it can rotate integrally with the inner ring of the bearing 1.

[0046] Specifically, in the present embodiment, the outer diameter of the large-diameter portion 31 of the sleeve 3 is slightly larger than the inner diameter of the inner ring of the bearing 1. When assembling and fixing the sleeve 3 to the bearing 1, the end of the sleeve 3 where the small-diameter portion is not formed (i.e., the end of the large-diameter portion 31 far from the small-diameter portion 32) is inserted into the inner ring of the bearing 1, and the sleeve 3 is assembled and fixed to the bearing 1 through the interference fit between the outer peripheral surface of the large-diameter portion 31 and the surface of the inner ring of the bearing 1.

[0047] Here, the extending direction of the sleeve 3 is parallel to the rotation axis of the bearing 1 (i.e., the up-and-down direction), and a part of the outer peripheral surface of the large-diameter portion 31 abuts against the inner wall of the bearing 1. When the outer ring of the bearing 1 is restricted from rotating, when a torque is applied to the sleeve 3 in the circumferential direction of the sleeve 3, the sleeve 3 can drive the inner ring of the bearing 1 to rotate integrally. In addition, after the use of the device, the sleeve 3 can be removed from the bearing 1 by applying a large force.

[0048] The outer diameter of the small-diameter portion 32 is smaller than the outer diameter of the large-diameter portion 31, and it is used for the ring 8 described later to be sleeved thereon. The connection method between the ring 8 and the small-diameter portion 32 will be described in detail later.

[0049] In addition, preferably, the length of the sleeve 3 is variable, and the small-diameter portion 32 can be kept outside the lug hole 13 by adjusting its length.

[0050] In addition, as Figure 1 shown, in the present embodiment, there are two sleeves 3, which are respectively assembled and fixed to the bearing 1 from both sides in the thickness direction of the bearing 1 in the above manner. Thus, when the outer ring of the bearing 1 is restricted from rotating, the bearing 1 can be driven to rotate by any one of the two sleeves 3.

[0051] The supporting mechanism is used to support the above-mentioned rotating mechanism. The supporting mechanism of the present embodiment includes an airbag 2, an air pipe 6, and a gas compression device 7.

[0052] The airbag 2 is made of a material with good flexibility, for example. When inflated, it can expand and form a columnar shape after being fully inflated. In the present embodiment, there are four airbags 2, and the length direction after being fully inflated is consistent with the thickness direction of the bearing 1, and they are firmly connected to the outer ring of the bearing 1 in a manner that restricts the relative movement with the outer ring of the bearing 1. In addition, in the present embodiment, the four airbags 2 are arranged at equal intervals along the circumferential direction of the bearing 1.

[0053] The air pipe 6 is used to connect two adjacent airbags 2 among the four airbags 2 in sequence, and each airbag 2 is communicated with each other through the air pipe 6. In the present embodiment, there are 4 air pipes 6, and the connection positions with each airbag 2 are located at the center of the length direction of the airbag 2.

[0054] The air compression device 7 is, for example, an air pump capable of inflating the airbag 2, and is connected to any one of the airbags 2. By inflating any one of the airbags 2, the air compression device 7 allows the gas to pass through the trachea 6 to inflate the remaining airbags 2.

[0055] Figure 4 , Figure 5 is a schematic view of the lug 12 equipped with the lug detection device of the present embodiment. As Figure 4 , Figure 5 shown, when installing the lug detection device of the present embodiment, first send the rotating mechanism into the lug hole 13 to be detected. Specifically, send the airbag 2 and the bearing 1 equipped with two sleeves 3 into the lug hole 13 to be detected together, and then inflate each airbag 2 through the air compression device 7. After inflation, the airbag 2 expands and abuts against the inner wall of the lug hole 13, thereby supporting the bearing 1 (i.e., the rotating mechanism) equipped with the sleeve 3.

[0056] Here, it is preferable that there is a large coefficient of friction between the surface of the airbag 2 and the inner wall of the lug hole 13, so as to stably support the steering mechanism in the lug hole 13 and prevent displacement during subsequent operations. In addition, the degree of inflation of the airbag 2 can be appropriately adjusted according to the size of the lug hole 13 to be detected, as long as it can stably support the rotating mechanism.

[0057] As Figure 1 shown, the positioning mechanism of the present embodiment is used to position and hold the first probe 10 and the second probe 11 described later, and mainly includes a ring 8, a rocker arm 4 and a probe clamp 5.

[0058] The ring 8 is circular when viewed in the thickness direction. For example, it is formed by bending a metal rod with a square cross-section into a circle and connecting the ends. The outer diameter of the ring 8 is set to be the same as the outer diameter of the large-diameter portion 31 on the sleeve 3, and the inner diameter is set to be slightly larger than the outer diameter of the small-diameter portion 32 on the sleeve 3, so that it can be sleeved on the outer peripheral surface of the small-diameter portion 32 of the sleeve 3.

[0059] In addition, the figure shows the case where the thickness of the ring 8 is the same as the length of the small-diameter portion 32 in the vertical direction, but it is not limited thereto. The thickness of the ring 8 can also be greater than or less than the length of the small-diameter portion 32 in the vertical direction.

[0060] In the present embodiment, two rings 8 are respectively sleeved on two sleeves 3. In the state where the ring 8 is sleeved on the outer peripheral surface of the small-diameter portion 32, the ring 8 can rotate freely along the circumferential direction of the sleeve 3 and can move along the extending direction of the sleeve 3. In addition, preferably, during the movement (including rotation and movement) of the ring 8 relative to the sleeve 3, the rotation axis of the ring 8 is parallel to that of the sleeve 3.

[0061] In addition, although not shown in the figure, a limiting member is provided on the ring 8, and this limiting member can keep the ring 8 in a certain position relative to the sleeve 3. Specifically, in the present embodiment, this limiting member is a bolt, and four radially penetrating threaded holes are circumferentially and equally spaced on the ring 8. After positioning the ring 8 to a suitable position, four bolts are screwed into the above-mentioned threaded holes on the ring 8, and the bolts are continuously screwed until the tails of the bolts pass through the threaded holes and abut against the outer peripheral surface of the sleeve 3 (the small-diameter part 32). Thus, the ring 8 is kept in a certain position relative to the sleeve 3 by the frictional force between the multiple bolts and the outer peripheral surface of the sleeve 3.

[0062] In addition, when the position of the ring 8 relative to the sleeve 3 is fixed, when a torque is applied to the ring 8 in the circumferential direction, the frictional force between the tail of the bolt and the outer peripheral surface of the small-diameter part 32 can cause the ring 8 to drive the sleeve 3 and the inner ring of the bearing 1 to rotate integrally.

[0063] The rocker arm 4 is, for example, a rod extending radially outward from the outer peripheral surface of the ring 8 and is integrally formed with the ring 8. When the above-mentioned limiting member is not used to hold the position of the ring 8, the ring 8 can be driven to move relative to the sleeve 3 via the rocker arm 4. When the ring 8 is held by the above-mentioned limiting member, a circumferential torque can be applied via the rocker arm 4 to cause the ring 8, the sleeve 3, and the inner ring of the bearing 1 to rotate integrally.

[0064] The probe clamp 5 is used to clamp the first probe 10 or the second probe 11 described later, and is provided at one end of the rocker arm 4 far from the ring 8 in a manner that can rotate relative to the rocker arm 4. Specifically, as Figure 1 shown, a connecting portion protruding from the main body is provided on the probe clamp 5, and a relatively thin portion is formed at one end of the rocker arm 4 far from the ring 8. The connecting portion of the probe clamp 5 and the relatively thin portion of the rocker arm 4 are connected by a rotating shaft 9 in a hinge connection manner, so that the probe clamp 5 is connected to the rocker arm 4 in a manner that can rotate relative to the rocker arm 4, and further, the probe clamped by the probe clamp 5 can rotate relative to the rocker arm 4.

[0065] In addition, the rotating shaft 9 has a limiting function. Specifically, after the probe clamp 5 rotates to a suitable angle, the rotating shaft 9 can limit the probe clamp 5 to prevent it from further rotating and deviating from this suitable angle. For example, the rotating shaft 9 includes a bolt and a nut. After the probe clamp 5 rotates to a suitable angle, the connecting portion between the rocker arm 4 and the probe clamp 5 can be clamped by tightening the nut, thereby restricting the rotation of the probe clamp 5.

[0066] In this embodiment, the first probe 10 is a probe for emitting ultrasonic waves for detection, and the second probe 11 is a probe for receiving ultrasonic waves. The two probes are connected to an ultrasonic detection instrument (not shown) through a cable for transmitting power or data. The ultrasonic detection instrument described herein can supply power to the two probes via the cable and can display the ultrasonic signal received by the second probe 11. Specifically, the ultrasonic detection instrument includes display components such as a display and an oscilloscope, and thereby displays the ultrasonic signal.

[0067] Here, the angles at which the first probe 10 emits ultrasonic waves and the second probe 11 receives ultrasonic waves are adjustable, and the first probe 10 and the second probe 11 are arranged such that the ultrasonic waves emitted by the first probe 10 reach the second probe 11 through reflection, refraction, etc. and are received. The specific arrangement of the two probes will be described later.

[0068] Hereinafter, the installation method and the usage method of the lug detection device of this embodiment will be described.

[0069] First, install the lug detection device of this embodiment into the lug hole 13 to be detected. Here, it is assumed that the lug hole 13 is a circular through-hole penetrating in the thickness direction (up and down direction) of the lug 12, and the two end faces of the lug 12 in the up and down direction are parallel to each other. Two sleeves 3 are inserted into the inner ring of the bearing 1 from both sides and can rotate integrally with the inner ring of the bearing 1, thereby forming a rotating mechanism of the device. Then, four airbags 2 are fixedly connected to the outer ring of the bearing 1, and the airbags 2 and the above-mentioned rotating mechanism are sent into the lug hole 13 to be detected in the non-inflated state. Here, the rotating mechanism is continuously sent until the bearing 1 reaches the center of the lug hole 13 in the up and down direction.

[0070] After the bearing 1 reaches the center, one of the four airbags 2 is inflated through the air pressure device 7, and the gas filled therein inflates the remaining three airbags 2 through the air pipe 6. This inflation process continues until the inflation levels of the four airbags 2 are the same and they abut against the inner wall of the lug hole 13. At this time, the rotating mechanism is supported in the lug hole 13 by the airbags 2, the rotation axis of the bearing 1 is parallel to the up and down direction, and since the airbags 2 abut against the inner wall of the lug hole 13 in a manner that is not likely to have relative movement with the inner wall of the lug hole 13, the outer ring of the bearing 1 is restricted from rotating, and the inner ring of the bearing 1 can be driven to rotate integrally by rotating the sleeve 3.

[0071] As Figure 4 、 Figure 5 shown, after completing the above installation, the two rocker arms 4 are respectively sleeved onto the small-diameter portions 32 of the two sleeves 3 via the ring 8, and the first probe 10 and the second probe 11 are respectively placed on the probe holders 5 provided on the two rocker arms 4. Here, for the sake of easy understanding, in Figure 4 、 Figure 5The probe clamp 5 is omitted, and one end of each of the two rocker arms 4 is directly connected to the two probes described later.

[0072] At this time, the first probe 10 is located above the lug 12, and the second probe 11 is located below the lug 12. Next, the relative positions of the two probes are adjusted to a relative position such that the ultrasonic waves emitted from the first probe 10 can be received by the second probe 11.

[0073] The above relative position is specifically calculated in advance according to the probe refraction angle, the thickness of the lug 12, etc. Here, the probe refraction angle refers to the angle at which ultrasonic waves are refracted due to the difference in sound velocity when passing through the air-lug interface. At this relative position, the ultrasonic waves emitted from the first probe 10 enter the lug 12 from above the lug 12, are refracted when passing through the air-lug interface, the refracted ultrasonic waves propagate linearly in the lug 12 and pass through the lug-air interface again to exit the lug 12, and are received by the second probe 11 after being refracted again.

[0074] Figure 6 Shows the propagation mode of ultrasonic waves when using the lug detection device of this embodiment. Figure 6 The dotted arrows in it indicate the propagation paths of the ultrasonic waves. In Figure 6 In the upper and lower two figures on the left, the states of the first probe 10 and the second probe 11 in the above relative position are shown. In the upper and lower two figures on the right, the states of the two probes after rotating counterclockwise by a certain angle around the axis of the lug hole 13 while maintaining the above relative position are shown.

[0075] As Figure 6 shown, when observing in the up-down direction, the propagation path of the ultrasonic waves in the lug 12 is tangent to the periphery of the lug hole 13. Specifically, when observing in the up-down direction, the first probe 10 and the second probe 11 are radially arranged on both sides of the lug hole 13, and the ultrasonic waves incident into the lug 12 propagate from one side to the other side relative to the radius of the lug hole 13, and their propagation path is inclined to the up-down direction and is tangent to the inner wall of the lug hole 13.

[0076] In addition, at this relative position, the two probes are held at positions as close as possible to the lug 12, that is, the first probe 10 is held at a position as close as possible to the upper end face of the lug 12, and the second probe 11 is held at a position as close as possible to the lower end face of the lug 12, so as to reduce the existence of the air gap between the probe and the end face, reduce energy loss, and improve the detection effect. In addition, a coupling agent can also be applied to the probe to further reduce energy loss and improve the detection effect.

[0077] After that, the relative positions of the two probes are maintained at the above-mentioned relative positions by adjusting the positions of the rocker arm 4 and the probe clamp 5. Specifically, the rocker arm 4 can rotate around the axial direction of the sleeve 3 or move along its axial direction through the circular ring 8, and the probe clamp 5 can adjust the angle of the clamped probe relative to the rocker arm 4 through the rotating shaft 9, so that the relative positions of the two probes are in the above-mentioned relative positions. Then, the rotation and movement of the rocker arm 4 are restricted by the limiting member, and the rotation of the rotating shaft 9 is restricted by using the limiting function of the rotating shaft 9. Thus, the two probes are maintained at this relative position.

[0078] After the two probes are maintained at the relative positions, the two probes are activated to transmit and receive ultrasonic waves, and it is tested whether the ultrasonic waves transmitted by the first probe 10 can pass through the lug 12 and be received by the second probe 11 and displayed on the ultrasonic detection instrument. If the ultrasonic waves cannot be received by the second probe 11, the relative positions of the two probes are continuously adjusted until reception is possible.

[0079] After the test is passed, gently push the rocker arm 4 to drive the two probes to slowly rotate one week around the axial direction of the bearing 1, and observe the acoustic wave signals displayed on the ultrasonic detection instrument during this process.

[0080] When there are no defects such as cracks around the lug hole 13, the ultrasonic waves propagate through the lug 12 and are received, and a stable penetration wave signal with a consistent wave height should appear on the ultrasonic detection instrument. When there are defects around the lug hole 13, when the ultrasonic waves propagate to the defect, due to the different media at the defect interface, the ultrasonic waves will be reflected and refracted. Therefore, compared with the propagation path without defects, the propagation path of the ultrasonic waves when encountering defects deviates greatly. Usually, only a small part of the ultrasonic waves can be received by the second probe 11, and sometimes even no ultrasonic waves can be received by the second probe 11 according to the degree of the defect. At this time, the penetration wave signal is shown to decrease or disappear on the ultrasonic detection instrument.

[0081] Therefore, it is possible to accurately judge whether there are defects around the lug hole 13 by observing the change of the penetration wave signal, avoiding the missed detection situation caused by improper incident angle of ultrasonic waves in the existing detection method. Thus, the lug detection device of this embodiment can scan the periphery of the lug hole 13 in a manner covering the up-and-down direction and the circumferential direction of the lug hole 13, realizing a 360° full-coverage scan of the circumference of the lug hole 13, and avoiding the potential safety hazards brought by some positions that cannot be scanned.

[0082] In addition, as Figure 6As shown, during the process of driving the two probes to rotate one full circle, the relative positions of the two probes can always remain unchanged. Therefore, during the use of the device, only one successful positioning of the two probes is required to achieve a 360° full coverage scan of the earpiece hole for 13 weeks, without the need to repeatedly adjust the probe positions or configure multiple sets of probes, saving the detection process and cost and improving the detection efficiency.

[0083] After the detection is completed, remove the probes from the probe clamp 5, then remove the rocker arm 4 from the sleeve 3, then deflate each airbag 2 and remove them together with the rotating mechanism from the earpiece hole 13. Finally, remove the outer ring of the bearing 1 from the airbag 2 and remove the sleeve 3 from the bearing 1. Thus, the removal of the earpiece detection device is completed.

[0084] (Main effects of this embodiment)

[0085] According to the ultrasonic detection and scanning device of this embodiment, the first probe 10 and the second probe 11 configured in a one-transmit-one-receive manner are arranged on both sides of the earpiece 12 along the axial direction of the earpiece hole 13 through the positioning mechanism, and the emitted ultrasonic waves are propagated in the earpiece 12 in a manner of being tangent to the circumference of the earpiece hole 13. And through the rotating mechanism, the first probe 10 and the second probe 11 can rotate around the axial direction of the earpiece hole 13 for a full circle. Thus, when the ultrasonic waves pass near the circumference of the earpiece hole 13, in the case of defects, the ultrasonic waves will be reflected and refracted. Compared with the case without defects, the acoustic wave signals received by the second probe 11 will attenuate or even disappear. Therefore, without considering the propagation direction and position of defects such as cracks, it is possible to accurately judge whether there are defects through the received acoustic wave signals, and it is possible to simply achieve a 360° full coverage detection of the circumference of the earpiece hole 13 by rotating the two probes, avoiding potential safety hazards caused by undetected defects, improving the detection accuracy and detection efficiency. At the same time, in the ultrasonic detection and scanning device of this embodiment, only two general-specification probes need to be configured, without the need to configure multiple dedicated probes for different regions of the earpiece 12, saving the detection cost. In addition, after the two probes are configured in a suitable state, there is no need to adjust the state of the probes again during the rotation process, and a full coverage detection of the circumference of the earpiece hole 13 can be simply achieved.

[0086] (Variant)

[0087] The present invention has been described above in an exemplary manner with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above embodiments.

[0088] For example, in the above embodiment, the first probe 10 emits ultrasonic waves and the second probe 11 receives ultrasonic waves as an example for illustration, but it is not limited thereto. It is also possible that the first probe 10 is a probe that receives ultrasonic waves and the second probe 11 is a probe that emits ultrasonic waves.

[0089] In addition, in the above-described embodiment, the sleeve 3 includes a large-diameter portion 31 and a small-diameter portion 32 with an outer diameter smaller than that of the large-diameter portion 31 as an example for illustration, but it is not limited thereto. For example, the sleeve 3 may be formed in a cylindrical shape with a constant outer diameter in the longitudinal direction, and the inner diameter of the ring 8 is set to be slightly larger than the outer diameter of the sleeve 3 and sleeved on the outer peripheral surface of the sleeve 3.

[0090] In addition, in the above-described embodiment, the propagation path of ultrasonic waves in the lug 12 is tangent to the inner wall surface of the lug hole 13 as an example for illustration, but it is not limited thereto. For example, during the propagation of ultrasonic waves in the lug 12, a part of the ultrasonic beam passes through the inner wall surface of the lug hole 13 and refracts so as not to be received by the second probe 11. At this time, the sound waves received by the second probe 11 can still be displayed as stable through waves on the ultrasonic detection instrument.

[0091] In addition, in the above-described embodiment, the ring 8 is held on the sleeve 3 by the limiting member of the bolt as an example for illustration, but it is not limited thereto. For example, a plurality of sets of spring pins opposite to each other in the radial direction may be provided on the ring 8, and a plurality of sets of through holes are correspondingly provided on the sleeve 3. The ring 8 is held on the sleeve 3 by inserting the spring pins into the through holes. In addition, the ring 8 may not have a limiting member. For example, both the ring 8 and the sleeve 3 are made of materials with strong magnetism, and the ring 8 can be held on the sleeve 3 by the magnetic force between the two after determining the appropriate position.

[0092] In addition, in the above-described embodiment, the ultrasonic detection and scanning device is used to detect defects around the holes on lug members such as the lug 12, but it is not limited thereto. It can also be applied to various perforated connecting members to detect the conditions of defects such as cracks on the hole edges.

[0093] It should be understood that within the scope of the present invention, the various parts in the embodiments can be freely combined, or the various parts in the embodiments can be appropriately deformed or omitted.

Claims

1. An ultrasonic detection scanning device for detecting the periphery of an ear hole on an ear piece, characterized in that: include: a first probe, wherein the first probe emits ultrasonic waves; a second probe, the second probe receiving the ultrasonic wave; as well as A rotating mechanism, through which the first probe and the second probe can rotate around the axial direction of the ear hole in a full circle, The first probe and the second probe can be arranged in a state where the tab hole is sandwiched in the axial direction and the ultrasonic wave is propagated in the tab near the periphery of the tab hole.

2. The ultrasonic detection scanning device according to claim 1, characterized in that: Also included is a supporting mechanism, which is used to support the rotating mechanism on the ear piece.

3. The ultrasonic detection scanning device according to claim 2, characterized in that: The device further includes a positioning mechanism, which is disposed on the rotating mechanism and is capable of maintaining the first probe and the second probe in the state.

4. The ultrasonic detection scanning device according to claim 3, characterized in that: The rotating mechanism includes a bearing and a sleeve, The sleeve rotates integrally with the inner ring of the bearing. The outer ring of the bearing is supported by the lug via the support mechanism.

5. The ultrasonic detection scanning device according to claim 4, characterized in that: The positioning mechanism includes a rocker arm, a ring and a probe clamp. The ring is formed integrally with the rocker arm, is sleeved on the sleeve, and can rotate or move relative to the sleeve. The probe clamp clamps the first probe or the second probe, is disposed on the rocker arm, and can rotate relative to the rocker arm.

6. The ultrasonic detection scanning device according to claim 5, characterized in that: The support mechanism includes an air bag configured to abut against an inner peripheral surface of the ear hole by being inflated.

7. The ultrasonic detection scanning device according to any one of claims 1 to 6, characterized in that: The first probe and the second probe can rotate a full circle around the axial direction while maintaining the state.

8. The ultrasonic detection scanning device according to claim 7, characterized in that: It also includes an ultrasonic detection instrument, which can display the sound wave signal of the ultrasonic wave received by the second probe.

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