An excitation device for acoustic detection of stress under the anchor of a bridge

Abstract

An acoustic detection excitation device for the stress under the anchor of a bridge, comprising a transmitting transducer and a receiving transducer arranged oppositely. A port connecting member is connected to the transmitting end of the transmitting transducer. The inner side of the port connecting member is connected to the transmitting transducer, and a tip structure is arranged on the outer side. The receiving end of the receiving transducer is connected to a combined connecting member. The combined connecting member includes an end face disc and an arc-shaped rubber pad. The inner side of the end face disc is connected to the receiving transducer by a threaded connection method, and a circular blind groove is arranged on the outer side, and the arc-shaped rubber pad is formed in the circular blind groove. The inner side of the arc-shaped rubber pad fits the circular blind groove and has a concave arc surface that fits the side wall of the corresponding anchor ring. The invention can be applicable to the detection of anchor rings of different sizes and can effectively improve the accuracy of detecting anchor rings.

Description

Technical Field

[0001] The present invention belongs to the field of ultrasonic testing, and particularly relates to an acoustic detection excitation device for the stress under the anchor of a bridge. Background Art

[0002] The acoustic wave non-destructive testing technology is one of the main methods of non-destructive testing. Due to its advantages such as light equipment, simple operation, good use conditions and safety performance, and high detection efficiency, this method is increasingly applied in fields such as roads, bridges, buildings, and medical treatment. The transducer is the core component of the ultrasonic detection system. Rare earth giant magnetostrictive materials are intelligent materials. Due to their advantages such as large magnetostrictive strain, high energy density, wide working frequency band, fast response, good reliability performance, and high precision, they have become ideal materials for making transducers. Piezoelectric ceramics have advantages such as high electro-acoustic efficiency and high receiving sensitivity, so they are also an ideal transducer material. The bottom surface of the transducer (the contact surface with the object to be measured) is generally made into a plane. In this way, when the surface of the object to be measured is a plane, the contact surface can be made more compact, the detection stability can be improved, and the measurement accuracy can be increased.

[0003] When the existing transducer is used to detect the bridge anchor ring (the surface to be measured is a curved surface), due to problems such as small contact surface and easy sliding, the detection data is unstable and the detection accuracy is low in actual detection. Moreover, there are many sizes of bridge anchor rings, so more influencing factors are added to the detection of bridge anchor rings using a plane transducer, and the measurement accuracy is greatly reduced. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an acoustic detection excitation device for the stress under the anchor of a bridge, which can be applicable to the stress acoustic detection excitation devices of anchor rings of different sizes to solve the defects in the above technical background.

[0005] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0006] An acoustic detection excitation device for the stress under the anchor of a bridge, comprising a transmitting transducer and a receiving transducer arranged oppositely. A port connecting member is connected to the transmitting end of the transmitting transducer. The inner side of the port connecting member is connected to the transmitting transducer, and a tip structure is arranged on the outer side. And a combined connecting member is connected to the receiving end of the receiving transducer. The combined connecting member includes an end face circular plate and an arc-shaped rubber pad. The inner side of the end face circular plate is connected to the receiving transducer by a threaded connection method, and a circular blind groove is arranged on the outer side, and the arc-shaped rubber pad is formed in the circular blind groove. The inner side of the arc-shaped rubber pad fits the circular blind groove and has an inner concave arc surface that fits the side wall of the corresponding anchor ring.

[0007] As a further limitation, both the port connector and the combined connector are detachable connectors, and the detachable connection methods between the port connector and the transmitting transducer and between the combined connector and the receiving transducer are one or a combination of threaded connection, snap connection, bolt connection, and pin connection.

[0008] As a further limitation, the arc-shaped rubber pad and the end face disc are bonded together with butter.

[0009] As a further limitation, the transmitting transducer is a giant magnetostrictive transducer.

[0010] As a further limitation, the receiving transducer is a piezoelectric transducer.

[0011] Beneficial effects: When the acoustic detection excitation device for the stress under the bridge anchor of the present invention is used for acoustic detection of the stress under the bridge anchor, the arc-shaped rubber pad increases the contact surface with the anchor ring and makes the contact surface fit more closely, thereby improving the measurement accuracy. When detecting anchor rings of different sizes, only the arc-shaped rubber pads with different curvature radii need to be replaced, avoiding the replacement of the transducers. Therefore, the detection efficiency is greatly improved and the instrument cost is saved. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the detection assembly of a preferred embodiment of the present invention.

[0013] Figure 2 It is a schematic diagram of the assembly at the transmitting transducer end of a preferred embodiment of the present invention.

[0014] Figure 3 It is a schematic diagram of the assembly at the receiving transducer end of a preferred embodiment of the present invention.

[0015] Figure 4 It is a schematic diagram of the structure of the port connector of a preferred embodiment of the present invention.

[0016] Figure 5 It is a schematic diagram of the structure of the combined connector of a preferred embodiment of the present invention.

[0017] Wherein: 1. Arc-shaped rubber pad; 2. End face disc; 3. Receiving transducer; 4. Transmitting transducer; 5. Port connector; 6. Upper spiral part of the circular groove; 7. Upper spiral part of the port connector. Detailed Embodiments

[0018] In order to make the technical means, creative features, achieved purposes, and effects of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0019] See Figures 1 to 5A preferred embodiment of an acoustic detection excitation device for the stress under a bridge anchor. In this embodiment, a giant magnetostrictive transducer is used as the transmitting transducer 4, and a piezoelectric transducer is used as the receiving transducer 3. It also includes a port connector 5 connected to the transmitting transducer 4 and a combined connector connected to the receiving transducer 3.

[0020] The transmitting transducer 4 is connected to the port connector 5, and the receiving transducer 3 is connected to the combined connector. The combined connector includes an end face disc 2. One end of the end face disc 2 is connected to the receiving transducer 3, and the other end is connected to the arc-shaped rubber pad 1. For the arc-shaped rubber pad 1, an arc-shaped rubber pad 1 with a suitable radius of curvature can be selected according to the size of different anchor rings. After pre-installing all components, then connect the transmitting transducer 4 and the port connector 5 using a screw groove to fit the upper spiral part 7 of the port connector. Since the port diameter of the port connector 5 is small, it can not only better contact the anchor ring but also make the energy output by the transmitting transducer 4 on the contact surface more uniform.

[0021] The receiving transducer 3 is connected to the end face disc 2 using a screw groove to fit the upper spiral part 6 of the circular groove and the receiving transducer 3. The groove of the end face disc 2 can well hold the arc-shaped rubber pad 1. The arc-shaped rubber pad 1 is stuck in the end face disc 2 and fixed with butter. The radius of curvature of the arc-shaped rubber pad 1 is the same as the radius of the anchor ring. Therefore, it can not only ensure that the arc-shaped rubber pad 1 can well contact the anchor ring but also only need to replace the arc-shaped rubber pad 1 with a suitable radius of curvature when detecting anchor rings of different sizes. Place the assembled transducer on the anchor ring for detection.

[0022] This embodiment is applied to the acoustic detection of the stress under a bridge anchor. Its working process is as follows: When detecting, place the transmitting transducer 4 and the receiving transducer 3 on both sides of the anchor ring, generally placed in a pair-measurement manner, that is, placed in the style as shown in Figure 1 shown. The component to be measured is located between the transmitting transducer 4 and the transmitting transducer 3. Select an arc-shaped rubber pad 1 with a suitable radius of curvature according to the size of the anchor ring, and then turn on the stress acoustic detection excitation device for detection. The ultrasonic wave emitted by the transmitting transducer 4 is received by the receiving transducer 3 after passing through the component to be measured.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the uses of these embodiments are only for illustrating the present invention and are not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications, and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. An excitation device for acoustic detection of the stress under the anchor of a bridge, characterized in that, It includes a relatively arranged transmitting transducer and a receiving transducer. A port connector is connected to the transmitting end of the transmitting transducer. The inner side of the port connector is connected to the transmitting transducer, and a tip structure is provided on the outer side. The receiving end of the receiving transducer is connected to a combined connector. The combined connector includes an end face disc and an arc-shaped rubber pad. The inner side of the end face disc is connected to the receiving transducer by a threaded connection method, and a circular blind groove is provided on the outer side, and the arc-shaped rubber pad is formed in the circular blind groove. The inner side of the arc-shaped rubber pad fits the circular blind groove and has an inner concave arc surface that fits the side wall of the corresponding anchor ring.

2. The acoustic detection excitation device for the stress under the anchor of a bridge according to claim 1, wherein Both the port connector and the combined connector are detachable connectors.

3. The acoustic detection excitation device for the stress under the anchor of a bridge according to claim 2, characterized in that The detachable connection method is one or a combination of threaded connection, snap connection, bolt connection, and pin connection.

4. The excitation device for acoustic detection of the stress under the bridge anchor according to claim 1, characterized in that, The arc-shaped rubber pad and the end face disc are bonded with butter.

5. The acoustic detection excitation device for the stress under the bridge anchor according to claim 1, characterized in that The transmitting transducer is a giant magnetostrictive transducer.

6. The acoustic detection excitation device for the stress under the anchor of a bridge according to claim 1, characterized in that, The receiving transducer is a piezoelectric transducer.

Images