An adjustable fixture for ultrasonic transducer signal testing

Abstract

The application provides an adjustable clamp for ultrasonic transducer signal testing, which has the characteristics of compact structure and convenient operation. The application realizes accurate adjustment and stable locking of the testing distance between two transducers by setting an independently slidable slider on a scale guide rail and fixing the clamp with the transducer on the slider through a mounting seat, avoids errors caused by relative shaking or displacement during the testing process, and significantly improves the reliability and repeatability of the testing. Meanwhile, the front end of the transducer clamp is designed to be flush with the front end of the slider, which ensures that the two probes always maintain good axial alignment during the adjustment process, maximizing the signal receiving rate. In addition, by opening various aperture mounting holes on the clamp body and cooperating with tightening screws and shock absorbing rings, the transducer of different shape sizes and frequencies can be stably fixed, and the synchronous testing of multiple pairs of transducers is compatible, which greatly improves the universality and testing efficiency of the tooling.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic transducer signal testing technology, and in particular to an adjustable fixture for ultrasonic transducer signal testing. Background Technology

[0002] In the field of industrial gas measurement, the performance of gas flow meters directly affects the accuracy of trade settlement and process control. Traditional gas metering instruments, such as orifice plate flow meters, vortex flow meters, and pitot tube flow meters, while widely used, generally suffer from drawbacks such as high requirements for the quality of the gas being measured, frequent maintenance, high maintenance costs, low levels of intelligence, and small range ratios. These shortcomings, to some extent, restrict the refined development of the gas industry. Compared to the aforementioned traditional instruments, ultrasonic gas flow meters, with their significant advantages such as wide range ratios, high intelligence, ease of installation, low cost, high accuracy, and low maintenance costs, are finding increasingly widespread application in gas metering scenarios, particularly for natural gas.

[0003] As the core component of ultrasonic gas flow meters, the performance of the ultrasonic transducer directly determines the measurement accuracy and reliability of the entire meter. In practical applications, the measurement range of the transducer is limited, and its signal sensitivity is closely related to the installation distance between the two transducers. The optimal test distance often varies for transducers of different frequencies and sizes. To select the best-performing transducer and determine its optimal installation parameters, a testing tool capable of accurately and stably adjusting the relative distance between two transducers is needed during R&D and production testing. Existing testing methods often use simple fixtures with fixed spacing, which cannot flexibly adapt to the testing needs of various transducers; or, although the distance can be adjusted, the adjustment accuracy is low, the position locking after adjustment is unreliable, and displacement easily occurs during testing, leading to inaccurate test results. Furthermore, existing fixtures usually cannot guarantee perfect alignment of the probe axes of the two transducers, affecting signal reception efficiency and test consistency, and their versatility is poor, making it difficult to accommodate transducers of various sizes.

[0004] Therefore, there is an urgent need in this field to develop a professional test fixture that can achieve precise adjustment and stable locking of transducer spacing, ensure probe alignment, and be compatible with transducers of various specifications, in order to solve the above-mentioned problems in the current performance testing of ultrasonic transducers. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable fixture for testing ultrasonic transducer signals, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides an adjustable fixture for testing ultrasonic transducer signals, comprising: guide; The first slider and the second slider are slidably mounted on the guide rail; The first mounting base and the second mounting base are respectively fixedly connected to the first slider and the second slider; The first mounting fixture and the second mounting fixture are fixedly connected to the first mounting base and the second mounting base, respectively. The first mounting fixture and the second mounting fixture are respectively provided with mounting holes for mounting transducers. The test distance between the transducers mounted on the two mounting fixtures can be adjusted by adjusting the relative positions of the first slider and the second slider on the guide rail.

[0007] Preferably, the first mounting fixture or the second mounting fixture includes a clamping device body, and the mounting hole includes a first mounting hole and a second mounting hole. The first mounting hole and the second mounting hole are formed on the clamping device body to accommodate ultrasonic transducers of different sizes.

[0008] Preferably, the first mounting hole is a small probe transducer mounting hole, and the second mounting hole is a large probe transducer mounting hole. The diameters of the first mounting hole and the second mounting hole are different to accommodate transducers of different shapes and sizes.

[0009] Preferably, the clamping device body is further provided with a tightening screw hole communicating with the first mounting hole and / or the second mounting hole, and a tightening screw is provided in the tightening screw hole for tightening and fixing the transducer installed in the mounting hole.

[0010] Preferably, transducer damping rings are provided in the first mounting hole and the second mounting hole, respectively. The transducer damping rings are sleeved on the transducer to reduce vibration and protect the transducer.

[0011] Preferably, the first mounting base or the second mounting base includes a mounting plate body, the mounting plate body having a guide rail slider mounting hole for connecting with the slider and a transducer clamp mounting hole for connecting with the mounting fixture.

[0012] Preferably, the first mounting fixture is detachably fixed to the first mounting base through the transducer fixture mounting hole, and the first mounting base is detachably fixed to the first slider through the guide rail slider mounting hole.

[0013] Preferably, the guide rail is provided with a scale for indicating distance, and the distance between the first slider and the second slider is read through the scale to achieve precise adjustment of the transducer test distance.

[0014] Preferably, the first mounting fixture or the second mounting fixture is provided with multiple mounting holes to simultaneously mount and fix multiple transducers, so as to support the simultaneous testing of multiple pairs of transducers.

[0015] Preferably, the first mounting base and the first slider, as well as the first mounting fixture and the first mounting base, are detachably connected, so that the test fixture forms a modular structure, which facilitates maintenance and replacement.

[0016] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides an adjustable fixture for ultrasonic transducer signal testing, featuring a compact structure and convenient operation. By setting an independently sliding slider on a graduated guide rail, and fixing the fixture with the transducer mounted on the slider via a mounting base, it achieves precise adjustment and stable locking of the testing distance between two transducers, avoiding errors caused by relative jitter or displacement during testing, and significantly improving the reliability and repeatability of the test. Simultaneously, by designing the front end of the transducer fixture flush with the front end of the slider, it ensures that the two probes maintain good axial alignment during adjustment, maximizing signal reception. Furthermore, by creating mounting holes of various diameters on the fixture body and using tightening screws and shock-absorbing rings, it can securely fix transducers of different sizes and frequencies, and is compatible with simultaneous testing of multiple pairs of transducers, greatly improving the versatility of the tooling and testing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the adjustable fixture for ultrasonic transducer signal testing provided by the present invention. Figure 2 This is a schematic diagram of the adjustable clamp transducer mounting base structure for ultrasonic transducer signal testing provided by the present invention. Figure 3 This is a schematic diagram of the installation of the adjustable-distance ultrasonic test signal assembly of the present invention. Detailed Implementation

[0019] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide an adjustable fixture for testing ultrasonic transducer signals, in order to solve the problems existing in the prior art.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1: like Figures 1 to 3The diagram shows a preferred embodiment of an adjustable fixture for ultrasonic transducer signal testing provided by the present invention. This adjustable fixture is mainly used for signal testing of ultrasonic transducers at different spacings to obtain performance parameters such as sensitivity of different transducers at different test distances. The fixture generally includes a guide rail 105 as a base, and a first slider 104 and a second slider 106 slidably disposed on the guide rail 105. To achieve independent adjustment and stable support of the two transducers 1011 and 1092, a first mounting base 103 is fixedly connected to the first slider 104, and a first mounting clamp 102 is fixedly connected to the first mounting base 103; similarly, a second mounting base 107 is fixedly connected to the second slider 106, and a second mounting clamp 108 is fixedly connected to the second mounting base 107. The transducers to be tested are respectively mounted on these two mounting clamps. By manually adjusting the relative positions of the first slider 104 and the second slider 106 on the guide rail 105, the test distance between the two transducers can be precisely changed. After the adjustment is completed, the friction between the slider and the guide rail or the locking mechanism (such as the locking screw commonly used in the art, not shown in the figure) can keep the distance stable, thereby ensuring the consistency of the test process.

[0025] Specifically, such as Figure 1 and Figure 3As shown, both the first mounting fixture 102 and the second mounting fixture 108 include a clamping device body 113 as the main body. To accommodate ultrasonic transducers of different sizes, multiple mounting holes of different diameters are provided on the clamping device body 113. In a preferred embodiment, these mounting holes include a first mounting hole 112 with a relatively small diameter and a second mounting hole 114 with a relatively large diameter. The first mounting hole 112 can be used as a mounting hole for small probe transducers, and the second mounting hole 114 can be used as a mounting hole for large probe transducers, thus enabling the same set of fixtures to be compatible with multiple transducer specifications without the need for separate tooling design for each transducer. To securely fix the transducer within the mounting holes and prevent loosening or axial displacement during testing, a tightening screw hole 111 communicating with the first mounting hole 112 and / or the second mounting hole 114 is also provided on the clamping device body 113, and a tightening screw 115 is screwed into the tightening screw hole 111. Once the transducer is inserted into the predetermined position, tightening the screw 115 secures it firmly against the transducer's outer casing, achieving reliable fixation. Furthermore, to reduce mechanical vibrations that the transducer may experience during installation or testing and to protect the transducer body from damage, transducer damping rings 116 can be respectively installed in the first mounting hole 112 and the second mounting hole 114. These damping rings 116 are typically made of flexible materials (such as rubber or silicone) and are fitted around the outer periphery of the transducer. They serve both to cushion and absorb vibrations and to fill the gap between the transducer and the inner wall of the mounting hole, improving stability.

[0026] See Figure 2 and Figure 3 Regarding the mounting structure of the connecting part, the first mounting base 103 or the second mounting base 107 in this embodiment includes a mounting plate body 1101. Two types of mounting holes are provided on the mounting plate body 1101 according to functional requirements: one is a guide rail slider mounting hole 1001 for connecting with the lower guide rail slider, and the other is a transducer clamp mounting hole 1002 for connecting with the upper mounting fixture. With this structural design, the first mounting fixture 102 can be detachably fixed to the first mounting base 103 using fasteners such as screws passing through the transducer clamp mounting hole 1002; simultaneously, the first mounting base 103 can be detachably fixed to the first slider 104 through the guide rail slider mounting hole 1001. This double-layer detachable connection method makes the entire test fixture a modular structure. When a component (such as the mounting fixture or slider) is worn or damaged, it can be replaced individually, reducing maintenance costs and repair difficulty, and facilitating large-scale promotion and use.

[0027] To further improve the intuitiveness and accuracy of distance adjustment, this embodiment features clear graduations on the guide rail 105, such as... Figure 3As shown. During testing, the operator can directly read the distance between the first slider 104 and the second slider 106 according to the scale on the guide rail, thereby quickly and accurately adjusting the distance between the two transducers according to different testing requirements. Simultaneously, by designing the front end face of the first mounting fixture 102 to be flush or aligned with the front end face of the first slider 104, and similarly setting the correspondence between the second mounting fixture 108 and the second slider 106, it can be ensured that the probe axes of the two transducers mounted on the fixtures remain on the same straight line during the movement of the two sliders, achieving good axis alignment, thereby maximizing signal transmission and reception efficiency and ensuring the reliability of test data.

[0028] As another optional implementation, to further improve testing efficiency, more (two or more) mounting holes of different or the same specifications can be opened on the first mounting fixture 102 or the second mounting fixture 108, thereby enabling the simultaneous installation and fixing of multiple pairs of transducers and supporting synchronous testing of multiple pairs of transducers. This is particularly suitable for scenarios requiring screening or comparative testing of a large number of transducers. Figure 3 As shown, in the assembled state, transducer 1011 is mounted on fixture 102, and transducer 1092 is mounted on fixture 1082. The test distance can be set by adjusting the positions of sliders 104 and 1062 on the graduated guide rail 105. At this time, the front faces of the two transducers are flush with the front faces of their respective sliders, ensuring optimal alignment. In summary, the adjustable fixture provided by this embodiment of the invention has a compact structure and is easy to operate, effectively solving the problems of low adjustment accuracy, poor compatibility, and inability to guarantee alignment in existing transducer testing fixtures.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0031] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. An adjustable fixture for testing ultrasonic transducer signals, characterized in that, include: Guide rail (105); The first slider (104) and the second slider (106) are slidably disposed on the guide rail (105); The first mounting base (103) and the second mounting base (107) are fixedly connected to the first slider (104) and the second slider (106), respectively; The first mounting fixture (102) and the second mounting fixture (108) are fixedly connected to the first mounting base (103) and the second mounting base (107), respectively. The first mounting fixture (102) and the second mounting fixture (108) are respectively provided with mounting holes for mounting transducers. The test distance between the transducers mounted on the two mounting fixtures is adjusted by adjusting the relative positions of the first slider (104) and the second slider (106) on the guide rail (105).

2. The adjustable fixture for ultrasonic transducer signal testing according to claim 1, characterized in that, The first mounting fixture (102) or the second mounting fixture (108) includes a clamping device body (113), and the mounting holes include a first mounting hole (112) and a second mounting hole (114). The first mounting hole (112) and the second mounting hole (114) are formed on the clamping device body (113) to accommodate ultrasonic transducers of different sizes.

3. The adjustable fixture for ultrasonic transducer signal testing according to claim 2, characterized in that, The first mounting hole (112) is a mounting hole for a small probe transducer, and the second mounting hole (114) is a mounting hole for a large probe transducer. The first mounting hole (112) and the second mounting hole (114) have different diameters to accommodate transducers of different sizes.

4. The adjustable fixture for ultrasonic transducer signal testing according to claim 2, characterized in that, The clamping device body (113) is also provided with a tightening screw hole (111) communicating with the first mounting hole (112) and / or the second mounting hole (114). The tightening screw hole (111) is provided with a tightening screw (115) for tightening and fixing the transducer installed in the mounting hole.

5. The adjustable fixture for ultrasonic transducer signal testing according to claim 2, characterized in that, The first mounting hole (112) and the second mounting hole (114) are respectively provided with transducer damping rings (116). The transducer damping rings (116) are sleeved on the transducer to reduce vibration and protect the transducer.

6. The adjustable fixture for ultrasonic transducer signal testing according to claim 1, characterized in that, The first mounting base (103) or the second mounting base (107) includes a mounting plate body (1101), which is provided with a guide rail slider mounting hole (1001) for connecting with the slider and a transducer clamp mounting hole (1002) for connecting with the mounting fixture.

7. The adjustable fixture for ultrasonic transducer signal testing according to claim 6, characterized in that, The first mounting fixture (102) is detachably fixed to the first mounting base (103) through the transducer fixture mounting hole (1002), and the first mounting base (103) is detachably fixed to the first slider (104) through the guide rail slider mounting hole (1001).

8. The adjustable fixture for ultrasonic transducer signal testing according to claim 1, characterized in that, The guide rail (105) is provided with a scale for indicating distance. The distance between the first slider (104) and the second slider (106) is read through the scale to achieve precise adjustment of the transducer test distance.

9. The adjustable fixture for ultrasonic transducer signal testing according to claim 1, characterized in that, The first mounting fixture (102) or the second mounting fixture (108) is provided with multiple mounting holes to simultaneously mount and fix multiple transducers, so as to support the simultaneous testing of multiple pairs of transducers.

10. The adjustable fixture for ultrasonic transducer signal testing according to claim 1, characterized in that, The first mounting base (103) and the first slider (104), and the first mounting fixture (102) and the first mounting base (103) are all detachably connected, so that the test fixture forms a modular structure, which is convenient for maintenance and replacement.

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