Echo testing device for ultrasonic annular array transducer

Abstract

The utility model relates to an echo testing device for an ultrasonic annular array transducer, which comprises two supporting seats and a mounting shaft penetrating through the supporting seats, and the annular array transducer is fixedly mounted on the mounting shaft; a first turntable and a second turntable are mounted on the mounting shaft and are respectively positioned at two ends of the annular array transducer; inclined grooves which are uniformly distributed along the circumference are formed in the surface, facing the annular array transducer, of the first turntable; inclined through grooves which are in one-to-one correspondence with the inclined grooves are formed in the second turntable; the inclined grooves and the inclined through grooves obliquely rotate around the mounting shaft, and sliding blocks at the two ends of a reflecting plate are movably mounted in the inclined grooves and the inclined through grooves which correspond to each other in position respectively; the two ends of the reflecting plate are connected with sliding blocks through universal joints and third connecting shafts, the other sides, located in the inclined through grooves, of the sliding blocks are connected with fixing shafts, and small friction wheels are installed at the tail ends of the fixing shafts. Large friction wheels capable of moving along the mounting shaft are arranged on the inner sides of the small friction wheels, and the wheel faces of the large friction wheels are attached to the wheel faces of the small friction wheels. According to the utility model, the inspection efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transducer echo testing devices, in particular to an ultrasonic annular array transducer echo testing device. Background Art

[0002] Intravascular ultrasound refers to a medical imaging technology that combines non-invasive ultrasound technology and invasive catheter technology, using a special catheter with an ultrasound probe connected to the end. A miniaturized ultrasonic transducer is placed into the cardiovascular cavity through a cardiac catheter. There are two types of cardiac catheter probes, namely a multi-chip annular array fixed transducer and a single-chip high-speed rotating transducer. Dynamic blood vessel cross-sectional scanning is completed, and the echo signal strength is displayed in grayscale through the imaging processing system, and two-dimensional cross-sectional imaging is performed to display the cardiovascular cross-sectional morphology. The technical solution described in the present invention is used in the inspection link of the production and manufacturing of multi-chip annular array transducers.

[0003] The purpose of ultrasonic transducer echo test is to measure the transducer amplitude, sensitivity and center frequency values. The commonly used device is to place a reflector (usually a reflector) in the ultrasonic medium in the direction of the transducer sound output, adjust the distance between the reflector and the transducer so that the reflector is located on the focal plane of the transducer's transmitted sound field, and then adjust the azimuth and angle of the transducer under test, and observe it with a general oscilloscope to maximize the first echo amplitude. The echo amplitude at this time is the sensitivity of the transducer under this measurement condition. The center frequency of the transducer can be obtained by performing spectrum analysis on the echo.

[0004] The existing technology can only meet the measurement of the sensitivity and center frequency of a single-chip high-speed rotating transducer. For a multi-chip annular array transducer, the sensitivity and center frequency of each transducer element can only be measured in sequence by the existing technology, which is complicated and inefficient. Therefore, it is necessary to design a test device that is more compatible with the structural characteristics of the annular array transducer to improve the test efficiency. Summary of the invention

[0005] The utility model provides an ultrasonic annular array transducer echo inspection device to solve the technical problems existing in the known technology. The device has a simple and compact structure, high reliability and can effectively improve the inspection efficiency.

[0006] The utility model includes the following technical solutions:

[0007] An ultrasonic annular array transducer echo inspection device comprises two support seats and a mounting shaft passing through the support seats, wherein the annular array transducer is fixedly mounted on the mounting shaft; a first turntable and a second turntable are also mounted on the mounting shaft, and the two are respectively located at two ends of the annular array transducer; the surface of the first turntable facing the annular array transducer is provided with inclined grooves evenly distributed along the circumference, and the second turntable is provided with inclined through grooves corresponding to the inclined grooves one by one; the inclined grooves and the inclined through grooves are both inclined and rotated around the mounting shaft (i.e., around the center lines of the first turntable and the second turntable), and a slider at two ends of a reflecting plate is movably mounted in the corresponding inclined grooves and the inclined through grooves respectively; the two ends of the reflecting plate are connected to the slider via a universal joint and a third connecting shaft, the other side of the slider located in the inclined through groove is connected to a fixed shaft, and a small friction wheel is mounted at the end of the fixed shaft; a plurality of the small friction wheels are provided with large friction wheels that can move along the mounting shaft on the inner side, and the large friction wheels are in contact with the wheel surfaces of the small friction wheels.

[0008] During the test, the annular array transducer is placed on the central axis of several reflective plates. The angle and distance between the reflective plates and the annular array transducer are adjusted through the relative rotation relationship of the first turntable, the second turntable and the large friction wheel, so as to measure the amplitude and center frequency.

[0009] Furthermore, a first connecting shaft is provided between the support seat near the first turntable and the installation shaft, and a second connecting shaft is provided between the support seat near the large friction wheel and the installation shaft; a first bearing is installed between the right protrusion of the first connecting shaft and the first turntable, and between the left protrusion of the second connecting shaft and the second turntable.

[0010] Furthermore, a second bearing is installed between the second connecting shaft and the large friction wheel.

[0011] Furthermore, a spring is provided between the second bearing and its adjacent support seat, and the spring is installed on the outer surface of the second connecting shaft. The spring is used to ensure that the large and small friction wheels always keep a close fit, and the initial position of the large friction wheel is the position where the reflector is at the maximum position.

[0012] Furthermore, when the large friction wheel is rotated, several small friction wheels rotate in the opposite direction to the large friction wheel, thereby driving several reflective plates to rotate; the third connecting shaft is nested in the slider, the end of the third connecting shaft is connected to the universal joint, and the other end of the universal joint is connected to the reflective plate; when one or several small friction wheels are rotated, the corresponding one or more reflective plates can be rotated, thereby testing the amplitude and center frequency of one or several specific transducer array elements.

[0013] Furthermore, when the first turntable and the second turntable rotate clockwise at the same time, the reflective plate in the annular array moves radially outward along the inclined groove, and the reflective plate can be adjusted to the farthest distance from the annular array transducer; when the first turntable and the second turntable rotate counterclockwise at the same time, the reflective plate in the annular array moves radially inward along the inclined groove, and the reflective plate can be adjusted to the closest distance from the annular array transducer; when the first turntable and the second turntable rotate in opposite directions, the extension line of the reflective plate body forms an angle with the installation axis, and the reflective plate and the annular array transducer present a depression angle or an elevation angle.

[0014] Furthermore, a handle is provided on the side of the first turntable and the second turntable respectively, and the rotation directions of the two turntables can be controlled by the handles respectively.

[0015] Furthermore, when the angle is adjusted, the rotation angle range of the reflector is between ±180 degrees, and the pitch angle range of the reflector is between ±45 degrees.

[0016] Furthermore, the testing device can test the annular array transducer with a diameter of 0.5mm-50mm.

[0017] Furthermore, the minimum distance from the reflector to the annular array transducer is 0.5 mm, and the maximum distance is 300 mm.

[0018] The utility model has the following advantages and positive effects:

[0019] 1. The utility model corresponds each array element of the annular array transducer to an adjustable reflector, thereby realizing echo inspection of the annular array transducer. This is an innovative design, which can significantly improve the efficiency of product production inspection and reduce production costs after being applied to production.

[0020] 2. The utility model has a simple and compact structure, a long service life and strong reliability. The multi-link linkage mechanism composed of large and small friction wheels, a fixed shaft and a reflective plate can greatly reduce the detection time, and each array element can be detected at the same time, thereby improving the production and inspection efficiency of the transducer.

[0021] 3. The reflector of the utility model can be adjusted uniformly or individually. It can not only measure the amplitude and center frequency of multiple groups of elements of the annular array at the same time, but also measure the amplitude and center frequency of a certain transducer element individually, which has a higher degree of freedom and more detailed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view schematic diagram of the utility model;

[0023] Figure 2 yes Figure 1 AA cross-sectional diagram of ;

[0024] Figure 3 yes Figure 2 A cross-sectional schematic diagram showing the middle and large friction wheels at the left end;

[0025] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure;

[0026] Figure 5 yes Figure 2 A cross-sectional schematic diagram showing the middle and large friction wheels at the right end;

[0027] Figure 6 yes Figure 5 Schematic diagram of the three-dimensional structure;

[0028] Figure 7 yes Figure 5 A cross-sectional schematic diagram of the first rotating disk and the second rotating disk after rotating in opposite directions;

[0029] Figure 8 yes Figure 2 A cross-sectional schematic diagram of the first rotating disk and the second rotating disk after rotating in opposite directions;

[0030] Fig. 9 is a schematic diagram of the distribution of inclined grooves on the first turntable;

[0031] Fig.10 is a three-dimensional cross-sectional view of the third connecting shaft and its connecting structure;

[0032] In the figure, 1-installation axis; 2-support seat; 3-first connecting axis; 4-first turntable; 5-universal joint; 6-reflection plate; 7-second turntable; 8-fixed axis; 9-small friction wheel; 10-second connecting axis; 11-first bearing; 12-third connecting axis; 13-slider; 14-annular array transducer; 15-second bearing; 16-large friction wheel; 17-spring; 18-handle. DETAILED DESCRIPTION

[0033] In order to further disclose the content, features and effects of the invention, the following examples are given and described in detail with reference to the accompanying drawings.

[0034] Example: See attached Figure 1-10 , an ultrasonic annular array transducer echo test device, comprising two support seats 2 and a mounting shaft 1 passing through the support seats 2, on which a ring array transducer 14 is fixed; the test device can test the ring array transducer 14 with a diameter of 0.5mm-50mm. The mounting shaft 1 is also equipped with a first turntable 4 and a second turntable 7, which are respectively located at the two ends of the ring array transducer 14; Fig. 9As shown, the surface of the first turntable 4 facing the annular array transducer 14 is provided with inclined grooves evenly distributed along the circumference, and the angle between two adjacent inclined grooves is 23°; the second turntable 7 is provided with inclined through grooves corresponding to the inclined grooves one by one; the inclined grooves and the inclined through grooves are both tilted and rotated around the installation axis 1 (that is, around the center line of the first turntable 4 and the second turntable 7), and a slider 13 at both ends of a reflecting plate 6 is movably installed in the corresponding inclined grooves and the inclined through grooves respectively; the two ends of the reflecting plate 6 are connected to the slider 13 through a universal joint 5 and a third connecting shaft 12, and the other side of the slider 13 located in the inclined through groove is connected to the fixed shaft 8, and a small friction wheel 9 is installed at the end of the fixed shaft 8; a large friction wheel 16 that can move along the installation axis 1 is provided on the inner side of several of the small friction wheels 9, and the large friction wheel 16 is in contact with the wheel surface of the small friction wheel 9.

[0035] A first connecting shaft 3 is provided between the support seat 2 near the first rotating disk 4 and the mounting shaft 1, and a second connecting shaft 10 is provided between the support seat 2 near the large friction wheel 16 and the mounting shaft 1; a first bearing 11 is provided between the right protrusion of the first connecting shaft 3 and the first rotating disk 4, and between the left protrusion of the second connecting shaft 10 and the second rotating disk 7. A second bearing 15 is provided between the second connecting shaft 10 and the large friction wheel 16. When the large friction wheel 16 is rotated, a plurality of small friction wheels 9 rotate in the opposite direction to the large friction wheel 16, thereby driving a plurality of reflective plates 6 to rotate; Fig.10 As shown, the third connecting shaft 12 is nested in the slider 13, the end of the third connecting shaft 12 is connected to the universal joint 5, and the other end of the universal joint 5 is connected to the reflective plate 6; when one or several small friction wheels 9 are rotated, the corresponding one or more reflective plates 6 can be rotated, thereby testing the amplitude and center frequency of one or several specific transducer array elements.

[0036] When the first turntable 4 and the second turntable 7 rotate clockwise at the same time, the reflective plate 6 in the annular array moves radially outward along the inclined groove, and the reflective plate 6 can be adjusted to the farthest distance from the annular array transducer 14; when the first turntable 4 and the second turntable 7 rotate counterclockwise at the same time, the reflective plate 6 in the annular array moves radially inward along the inclined groove, and the reflective plate 6 can be adjusted to the closest distance from the annular array transducer 14; the minimum distance from the reflective plate 6 to the annular array transducer 14 is 0.5mm, and the maximum distance is 300mm.

[0037] When the first turntable 4 and the second turntable 7 rotate in opposite directions, the extension line of the main body of the reflector 6 forms an angle with the installation axis 1, and the reflector 6 and the annular array transducer 14 present a depression angle or elevation angle. A handle 18 is respectively provided on the side of the first turntable 4 and the second turntable 7, and the rotation direction of the two can be controlled by the handle 18. When adjusting the angle, the rotation angle range of the reflector 16 is between ±180 degrees, and the pitch angle range of the reflector 16 is between ±45 degrees.

[0038] Working principle: During the test, the annular array transducer 14 is placed on the central axis of several reflective plates 6. The angle and distance between the reflective plates 6 and the annular array transducer 14 are adjusted by the relative rotation relationship between the first turntable 4, the second turntable 7 and the large friction wheel 16, so as to measure the amplitude and the center frequency. The multi-link linkage mechanism composed of the large friction wheel 16, the small friction wheel 9, the fixed shaft 8 and the reflective plate 6 can greatly reduce the detection time, and each array element can be detected at the same time, thereby improving the production inspection efficiency of the annular array transducer 14. The present invention corresponds each array element of the annular array transducer 14 to an adjustable reflective plate 6, thereby realizing the echo inspection of the annular array transducer 14. It is an innovative design. After being applied to production, it can significantly improve the efficiency of product production inspection and reduce production costs.

[0039] Although the preferred embodiments of the utility model are described above, they are not limited to the above specific implementations, which are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can make many forms without departing from the purpose of the utility model and the scope of protection of the claims. All of these belong to the protection scope of the utility model.

Claims

1. An ultrasonic annular array transducer echo inspection device, comprising two support seats and a mounting shaft passing through the support seats, wherein the annular array transducer is fixedly mounted on the mounting shaft, and characterized in that: A first turntable and a second turntable are also installed on the installation shaft, and the two are respectively located at two ends of the annular array transducer; the first turntable is provided with inclined grooves evenly distributed along the circumference on the surface facing the annular array transducer, and the second turntable is provided with inclined through grooves corresponding to the inclined grooves one by one; the inclined grooves and the inclined through grooves both tilt and rotate around the installation shaft, and a slider at both ends of a reflecting plate is movably installed in the corresponding inclined grooves and the inclined through grooves respectively; the two ends of the reflecting plate are connected to the slider through a universal joint and a third connecting shaft, the other side of the slider located in the inclined through groove is connected to a fixed shaft, and a small friction wheel is installed at the end of the fixed shaft; a large friction wheel that can move along the installation shaft is provided on the inner side of several of the small friction wheels, and the wheel surface of the large friction wheel is in contact with the wheel surface of the small friction wheel.

2. The ultrasonic annular array transducer echo inspection device according to claim 1, characterized in that: A first connecting shaft is provided between the support seat near the first turntable and the mounting shaft, and a second connecting shaft is provided between the support seat near the large friction wheel and the mounting shaft; a first bearing is installed between the right protrusion of the first connecting shaft and the first turntable, and between the left protrusion of the second connecting shaft and the second turntable.

3. The ultrasonic annular array transducer echo inspection device according to claim 2, characterized in that: A second bearing is installed between the second connecting shaft and the large friction wheel.

4. The ultrasonic annular array transducer echo inspection device according to claim 3, characterized in that: A spring is provided between the second bearing and the adjacent support seat, and the spring is installed on the outer surface of the second connecting shaft.

5. The ultrasonic annular array transducer echo inspection device according to claim 1, characterized in that: When the large friction wheel is rotated, several small friction wheels rotate in the opposite direction to the large friction wheel, thereby driving several reflective plates to rotate; the third connecting shaft is nested in the slider, the end of the third connecting shaft is connected to the universal joint, and the other end of the universal joint is connected to the reflective plate; when one or several small friction wheels are rotated, the corresponding one or more reflective plates can be rotated.

6. The ultrasonic annular array transducer echo inspection device according to claim 1, characterized in that: When the first turntable and the second turntable rotate clockwise at the same time, the reflective plate in the annular array moves radially outward along the inclined groove, and the reflective plate can be adjusted to the farthest distance from the annular array transducer; when the first turntable and the second turntable rotate counterclockwise at the same time, the reflective plate in the annular array moves radially inward along the inclined groove, and the reflective plate can be adjusted to the closest distance from the annular array transducer; when the first turntable and the second turntable rotate in opposite directions, the extension line of the reflective plate body forms an angle with the installation axis, and the reflective plate and the annular array transducer present a depression angle or an elevation angle.

7. The ultrasonic annular array transducer echo inspection device according to claim 6, characterized in that: A handle is respectively disposed on the side of the first rotating disk and the side of the second rotating disk.

8. The ultrasonic annular array transducer echo inspection device according to claim 6, characterized in that: When adjusting the angle, the rotation angle range of the reflector is between ±180 degrees, and the pitch angle range of the reflector is between ±45 degrees.

9. An ultrasonic annular array transducer echo inspection device according to any one of claims 1 to 8, characterized in that: The testing device can test the annular array transducer with a diameter of 0.5mm-50mm.

10. An ultrasonic annular array transducer echo inspection device according to any one of claims 1 to 8, characterized in that: The minimum distance from the reflector to the annular array transducer is 0.5 mm, and the maximum distance is 300 mm.

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