Ultrasonic probe device for detecting bolt with sunken end face

Abstract

The ultrasonic probe device comprises a connector lug, a probe seat and a probe, the connector lug is arranged at the upper end of the probe seat and electrically connected with the probe, the ultrasonic probe device is characterized in that the probe seat is a cylinder, the probe comprises a probe shell and an array element, the probe shell is detachably installed at the lower end of the probe seat, and the array element is electrically connected with the probe shell. The array element is arranged on the probe shell and located in the probe seat, and the lower end face of the probe shell is an arc face protruding downwards. The ultrasonic probe device can be effectively coupled with the end face of the bolt during detection, it is ensured that an acoustic beam effectively enters and covers a detection area, and the detection effect is improved.

Description

Technical Field

[0001] This utility model relates to a detection device, and in particular to an ultrasonic probe device for detecting bolts with recessed end faces. Background Technology

[0002] Ultrasonic testing, as a commonly used non-destructive testing technique, is widely used in the inspection of various industrial products due to its ability to detect internal defects. However, traditional ultrasonic testing probes are usually planar probes. Due to shape limitations, these planar probes have poor geometric compatibility with the bolt end face, making it difficult to form good and effective coupling with the bolt end face, especially the concave end face. The special geometric structure of the concave end face of the bolt easily causes sound beam scattering during testing, preventing the ultrasonic testing sound beam from being effectively focused, thus forming a detection blind zone. This seriously affects the detection effect of internal defects in the bolt, making it impossible to carry out effective inspection of the bolt. Furthermore, poor coupling effect also greatly affects the detection sensitivity, making it difficult to detect some small or specially located defects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an ultrasonic probe device for detecting bolts with recessed end faces. This ultrasonic probe device can form effective coupling with the bolt end face during detection, ensuring that the sound beam is effectively incident and covers the detection area, thereby improving the detection effect.

[0004] An ultrasonic probe device for detecting bolts with recessed end faces includes a connector, a probe base, and a probe. The connector is located at the upper end of the probe base and is electrically connected to the probe. The probe base is a cylindrical body, and the probe includes a probe housing and an array element. The probe housing is detachably installed at the lower end of the probe base, and the array element is located on the probe housing and within the probe base. The lower end face of the probe housing is a downwardly convex arc surface.

[0005] In the aforementioned ultrasonic probe device, the probe can be replaced according to the degree of concavity on the bolt end face. A probe with the same curvature as the lower end face of the probe housing and the concave surface of the bolt can be selected for installation. When using the ultrasonic probe device to inspect the bolt, because the curved surface contacts and fully couples with the bolt end face, it ensures that the sound beam emitted from the array element effectively enters and covers the inspection area, improving the sound beam focusing effect. This allows for comprehensive bolt inspection, ensuring no blind spots and effectively improving defect identification accuracy.

[0006] Typically, an array element includes a positive electrode layer, a piezoelectric wafer, and a negative electrode layer. The positive and negative electrode layers are electrically connected to the connectors.

[0007] In a preferred embodiment, the probe further includes an arc-shaped support plate mounted on the probe housing. The arc-shaped support plate has the same concave curvature as the lower end face of the probe housing. The array element is mounted on the arc-shaped support plate, and the upper surface of the array element is in close contact with the lower surface of the arc-shaped support plate. The arc-shaped support plate ensures that the array element has the same curvature as the arc surface, further guaranteeing the coverage area when the sound beam enters.

[0008] In a further preferred embodiment, the probe includes a backing layer that forms the arc-shaped support plate. Of course, when high detection accuracy is not required, the array elements and the backing layer can also be planar.

[0009] In a preferred embodiment, the probe includes a matching layer that protrudes from the lower end of the probe housing and forms the arc surface.

[0010] In a further preferred embodiment, the matching layer is an acoustic impedance gradient matching layer. Regarding material matching, insufficient material matching technology can lead to energy loss due to the acoustic impedance difference between the ultrasonic probe and the bolt material. This energy loss further reduces defect identification accuracy, severely impacting the accuracy and reliability of ultrasonic testing in bolt defect detection. Therefore, using an acoustic impedance gradient matching layer allows for better acoustic impedance matching over a wider frequency range, effectively reducing sound wave reflection at the interface and improving ultrasonic energy transmission efficiency. Because its acoustic impedance is gradually changing, it is more adaptable to sound waves, enabling smoother transitions between different acoustic impedance media, thereby reducing the reflection coefficient, improving the quality and resolution of the ultrasonic signal, and achieving higher detection accuracy for minute defects.

[0011] In a further preferred embodiment, the matching layer is made of a polymer-based composite material, a metal-based composite material, or a polymer-metal composite material. The polymer-based composite material can be an epoxy resin-based composite material or a polyurethane-based composite material; the metal-based composite material can be an aluminum-based composite material or a titanium-based composite material; and the polymer-metal composite material can be a polyurethane-aluminum powder composite material or a polyimide-silver powder composite material.

[0012] The beneficial effects of this invention are as follows: this ultrasonic probe device can effectively couple with the bolt end face during testing, ensuring that the sound beam is effectively incident and covers the testing area, thereby improving the testing effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the ultrasonic probe device in an embodiment of the present invention;

[0014] Figure 2 This is a cross-sectional view of the probe in an embodiment of this utility model;

[0015] Figure 3This is a schematic diagram of the array element structure in an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the ultrasonic probe device used to inspect bolts in an embodiment of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] like Figure 1-4 An ultrasonic probe device for detecting recessed end face bolts is shown, including a connector 1, a probe base 2, and a probe 3. The connector 1 is located at the upper end of the probe base 2 and is electrically connected to the probe 3. The probe base 2 is a cylindrical body. The probe 3 includes a probe housing 301 and an array element 302. The probe housing 301 is detachably installed at the lower end of the probe base 2. The array element 302 is located on the probe housing 301 and in the probe base 2. The lower end face of the probe housing 301 is a downwardly convex arc surface.

[0019] In the aforementioned ultrasonic probe device, the probe 3 can be replaced according to the degree of concavity on the end face of the bolt 4. The probe 3 with the same curvature as the concave surface of the lower end face of the probe housing 301 is selected for installation. When using the ultrasonic probe device to inspect the bolt 4, because the arc surface contacts and fully couples with the end face of the bolt 4, it ensures that the sound beam emitted from the array element 302 effectively enters and covers the detection area, improving the sound beam focusing effect. This allows for comprehensive inspection of the bolt 4, ensuring no blind spots and effectively improving defect identification accuracy. The array element 302 includes a positive electrode layer, a piezoelectric crystal, and a negative electrode layer. The positive and negative electrode layers are electrically connected to the connector 1.

[0020] The probe 3 also includes an arc-shaped support plate 303, which is mounted on the probe housing 301. The arc-shaped support plate 303 and the lower end face of the probe housing 301 have the same concave curvature. The array element 302 is mounted on the arc-shaped support plate 303, and the upper surface of the array element 302 is in close contact with the lower surface of the arc-shaped support plate 303. The arc-shaped support plate 303 ensures that the curvature of the array element 302 matches that of the arc surface, further ensuring the coverage range when the sound beam enters.

[0021] The probe 3 includes a backing layer, which forms an arc-shaped support plate 303.

[0022] The probe 3 includes a matching layer 304, which is exposed at the lower end of the probe housing 301 and forms an arc surface.

[0023] Matching layer 304 employs an acoustic impedance gradient matching layer 304. Regarding material matching, insufficient material matching technology can lead to energy loss due to the acoustic impedance difference between the ultrasonic probe and the bolt 4 material. This energy loss further reduces defect identification accuracy, severely impacting the accuracy and reliability of ultrasonic testing in bolt 4 defect detection. Therefore, matching layer 304 employs an acoustic impedance gradient matching layer 304, achieving better acoustic impedance matching over a wider frequency range, effectively reducing sound wave reflection at the interface, and improving ultrasonic energy transmission efficiency. Because its acoustic impedance is gradually changing, it is more adaptable to sound waves, allowing for a smoother transition between different acoustic impedance media, thereby reducing the reflection coefficient, improving the quality and resolution of the ultrasonic signal, and achieving higher detection accuracy for minute defects.

[0024] The matching layer 304 is made of polymer-based composite material, metal-based composite material, or polymer-metal composite material. The polymer-based composite material can be epoxy resin-based composite material or polyurethane-based composite material; the metal-based composite material can be aluminum-based composite material or titanium-based composite material; the polymer-metal composite material can be polyurethane-aluminum powder composite material or polyimide-silver powder composite material.

Claims

1. An ultrasonic probe device for detecting recessed end face bolts, comprising a connector, a probe holder, and a probe, wherein the connector is disposed at the upper end of the probe holder and electrically connected to the probe, characterized in that: The probe holder is a cylindrical body, and the probe includes a probe shell and an array element. The probe shell is detachably installed at the lower end of the probe holder, and the array element is set on the probe shell and located in the probe holder. The lower end surface of the probe shell is a downwardly convex arc surface.

2. An ultrasonic probe device for detecting recessed end face bolts according to claim 1, characterized in that: The probe also includes an arc-shaped support plate, which is mounted on the probe housing. The arc-shaped support plate has the same concave curvature as the lower end face of the probe housing. The array element is mounted on the arc-shaped support plate, and the upper surface of the array element is in close contact with the lower surface of the arc-shaped support plate.

3. An ultrasonic probe apparatus for detecting recessed end face bolts as defined in claim 2, characterized in that: The probe includes a backing layer, which forms the arc-shaped support plate.

4. An ultrasonic probe apparatus for detecting recessed end face bolts as defined in claim 1, characterized in that: The probe includes a matching layer that protrudes from the lower end of the probe housing and forms the arc surface.

5. An ultrasonic probe apparatus for detecting recessed end face bolts as defined in claim 4, characterized in that: The matching layer is an acoustic impedance gradient matching layer.

6. The ultrasonic probe device for detecting recessed end face bolts as described in claim 5, characterized in that: The matching layer is made of polymer-based composite material, metal-based composite material or polymer-metal composite material.

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