Bridge tunnel crack depth measuring instrument

Abstract

The utility model provides a kind of bridge tunnel crack depth measuring instrument, comprising: host computer;Two transducers respectively connected with the host computer through data line;And the spacing adjusting mechanism for adjusting the distance between two transducers;The spacing adjusting mechanism comprises: mounting seat;Two oscillating members, two oscillating members are rotatably connected on the both sides of mounting seat;Two transducers are respectively arranged at the end of two oscillating members;Synchronous reverse rotation of two transducers is realized by gear set, ensure that two transducers always move synchronously with mounting seat center as symmetry point during adjusting process, which fundamentally solves the problem that traditional slide rail type adjusting is difficult to ensure that transducer is symmetrical to crack center line, reduces the measurement error caused by alignment deviation, significantly improves the accuracy and reliability of crack depth measurement.

Description

Technical Field

[0001] This utility model relates to the technical field of crack depth measuring instruments, and in particular to a crack depth measuring instrument for bridge tunnels. Background Technology

[0002] Bridges, tunnels, and other infrastructure are prone to developing various cracks during long-term service due to factors such as load, environmental erosion, and material aging. Crack depth is an important indicator for assessing the degree of structural damage and determining its safety and durability, and is crucial for timely maintenance and reinforcement, as well as preventing disasters.

[0003] Currently, non-destructive testing techniques such as ultrasonic testing and impact elastic wave testing are commonly used to measure crack depth. Among these, the method based on dual transducer cross-crack measurement is widely used due to its relatively simple operation and reliable results. This method typically requires symmetrically arranging two transducers on both sides of the crack, and adjusting the distance between them to accommodate cracks of different widths and orientations, thereby obtaining accurate acoustic time parameters to calculate the depth.

[0004] However, the most common adjustment method is the sliding rail type, which makes it difficult to ensure that the two transducers are always symmetrical to the crack centerline, which can easily introduce measurement errors. In addition, the adjustment process is inconvenient, requiring adjustment of one transducer before adjusting the other. Utility Model Content

[0005] Based on this, the present invention provides a bridge tunnel crack depth measuring instrument to solve the problems in the prior art where it is difficult to ensure that the two transducers are always symmetrical to the crack centerline and the adjustment process is inconvenient.

[0006] This utility model provides the following technical solution: a bridge tunnel crack depth measuring instrument, comprising: a main unit; two transducers respectively connected to the main unit via data cables; and a spacing adjustment mechanism for adjusting the distance between the two transducers;

[0007] The spacing adjustment mechanism includes:

[0008] Mounting base;

[0009] The two swinging components are rotatably connected to both sides of the mounting base; the two transducers are respectively disposed at the ends of the two swinging components.

[0010] A gear set disposed between the two said oscillating members; rotation of one of the oscillating members drives the other oscillating member to rotate synchronously via the gear set.

[0011] The scale and indicator arrow, wherein the indicator arrow is provided on one of the swing members, and the scale is provided on the mounting base, and the indicator arrow cooperates with the scale to indicate the current distance between the two transducers;

[0012] A limiting component, wherein at least one of the swing members is disposed between the swing member and the mounting base, the limiting component being used to provide rotational resistance to the swing member.

[0013] Furthermore, the swing element includes:

[0014] A swing arm and a rotating shaft, wherein the swing arm is provided with the rotating shaft, and the swing arm is rotatably connected to the mounting base through the rotating shaft;

[0015] The mounting sleeve is provided on the swing arm, and the transducer is detachably installed inside the mounting sleeve.

[0016] Furthermore, the gear set includes two gears, one of which is disposed on the shaft of one of the oscillating members, and the other gear is disposed on the shaft of the other oscillating member, and the two gears mesh.

[0017] Furthermore, the limiting components include:

[0018] A chuck, the chuck being mounted on the rotating shaft;

[0019] The chuck has a plurality of grooves arranged around the axis of the rotating shaft;

[0020] The mounting disk is provided on the mounting base;

[0021] The mounting plate is provided with at least one telescopic component, and the telescopic end of the telescopic component is located in the groove.

[0022] Furthermore, the telescopic member includes:

[0023] Sliding sleeve, the sliding sleeve being disposed on the mounting plate.

[0024] The slide rod is slidably connected to the sliding sleeve;

[0025] A sphere, the sphere being disposed at the end of the slide rod away from the slide sleeve, the shape of the groove being adapted to the shape of the sphere;

[0026] An elastic element is provided between the slide rod and the slide sleeve.

[0027] Furthermore, the bridge tunnel crack depth measuring instrument also includes:

[0028] Handle, the handle provided on the mounting base.

[0029] Furthermore, the bridge tunnel crack depth measuring instrument also includes:

[0030] A shield, a shield disposed between the two swing arms, the shield being flexibly positioned above the gear set.

[0031] The beneficial effects of this utility model are:

[0032] The gear set enables the two transducers to rotate synchronously in opposite directions, ensuring that during adjustment, the two transducers always move synchronously with the center of the mounting base as the symmetrical point. This fundamentally solves the problem that traditional slide rail adjustment cannot guarantee the transducer symmetry with the crack centerline, reduces measurement errors caused by alignment deviations, and significantly improves the accuracy and reliability of crack depth measurement.

[0033] By operating with just one hand and rotating a single lever, the distance between two transducers can be adjusted synchronously, eliminating the need to adjust each transducer separately as in traditional methods. This simplifies the operation, saves adjustment time, and significantly improves work efficiency and ease of use, especially in testing environments with limited space or requiring frequent adjustments. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0035] Figure 2 This is a three-dimensional structural diagram of the spacing adjustment mechanism of this utility model.

[0036] Figure 3 This is a three-dimensional structural diagram of the shaft and gear of this utility model.

[0037] Figure 4 This is an exploded three-dimensional structural diagram of the limiting component of this utility model.

[0038] Figure 5 This is a three-dimensional structural diagram of the card slot component of this utility model.

[0039] The labels in the attached diagram are as follows: 1-Main unit, 2-Data cable, 3-Transducer, 4-Gap adjustment mechanism, 41-Mounting base, 42-Swing rod, 43-Mounting sleeve, 44-Handle, 45-Scale, 46-Indicator arrow, 47-Limit component, 471-Chuck, 472-Groove, 474-Telescopic component, 4741-Sliding sleeve, 4742-Sliding rod, 4743-Sphere, 4744-Spring, 473-Mounting plate, 48-Shield, 49-Shaft, 410-Gear. Detailed Implementation

[0040] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] This embodiment provides a bridge tunnel crack depth measuring instrument, such as... Figure 1 As shown, it includes: a host 1; two transducers 3 connected to the host 1 via data cables 2; and a spacing adjustment mechanism 4 for adjusting the distance between the two transducers 3.

[0044] The host 1 is used to control the measurement process, process data and display results; the two transducers 3 are connected to the host 1 via data lines 2 and are used to transmit and receive ultrasonic signals; the host 1 and the transducers 3 are existing technologies and will not be described in detail here; the spacing adjustment mechanism 4 is used to synchronously adjust the spacing between the two transducers 3 so that the two transducers 3 are symmetrical about the crack center line.

[0045] In this embodiment, as Figures 2-5 As shown, the spacing adjustment mechanism 4 includes: a mounting base 41, a swinging component, a gear set 410, a scale 45, an indicator arrow 46, and a limit assembly 47;

[0046] Among them, the mounting base 41 is used to fix the swing component, the gear 410 group and the limiting component 47;

[0047] The mounting base 41 has two rotatably connected swing members on both sides; two transducers 3 are respectively set at the ends of the two swing members;

[0048] Specifically, the oscillating component includes a swing arm 42, a rotating shaft 49, and a mounting sleeve 43. The rotating shaft 49 is mounted on the swing arm 42, and the swing arm 42 is rotatably connected to the mounting base 41 via the rotating shaft 49. The mounting sleeve 43 is also mounted on the swing arm 42, and the transducer 3 is detachably mounted within the mounting sleeve 43. It is worth noting that the rotating shaft 49 is fixedly connected to the end of the swing arm 42 near the mounting base 41, and the rotating shaft 49 is rotatably connected to the mounting base 41, thereby allowing the swing arm 42 to rotate upwards by 90 degrees. The mounting sleeve 43 is fixedly connected to the end of the swing arm 42 away from the rotating shaft 49, and the transducer 3 is detachably connected within the mounting sleeve 43. This detachable connection can be achieved through bolts or snap-fit ​​connections. The detachable connection method is existing technology and will not be elaborated upon here. Figure 2 As shown, the rear side of the mounting sleeve 43 is open to expose the functional end of the transducer 3, and the front side of the mounting sleeve 43 has a hole to allow the data cable 2 to pass through.

[0049] A set of gears 410 is provided between the two oscillating components; rotation of one oscillating component will drive the other oscillating component to rotate synchronously through the set of gears 410.

[0050] Specifically, such as Figure 3 As shown, the gear set 410 includes two gears 410. One gear 410 is fixedly connected to the shaft 49 of one of the oscillating components, and the other gear 410 is fixedly connected to the shaft 49 of the other oscillating component. The two gears 410 have the same number of teeth and the same module, and mesh with each other. The axes of the two gears 410 are the same as the axis of the shaft 49. When one oscillating component is driven to rotate, the oscillating component will drive the gear 410 on it to rotate. This gear 410 drives the other gear 410 to rotate, thereby causing the other oscillating component to rotate. This achieves synchronous counter-rotation of the two oscillating components, ensuring the symmetrical movement of the transducer 3.

[0051] The scale 45 and the indicator arrow 46, the indicator arrow 46 is provided on one of the swing members, the scale 45 is provided on the mounting base 41, and the indicator arrow 46 cooperates with the scale 45 to indicate the current distance between the two transducers 3;

[0052] Specifically, such as Figure 2 As shown, an indicator arrow 46 is provided on the right-side swing arm 42, and a scale 45 is printed or engraved on the front side of the mounting base 41 near the right-side swing arm 42. The scale 45 is arranged in an arc shape, and the unit is millimeters. The indicator arrow 46 on the right-side swing arm 42 points to the scale 45, thus visually displaying the current distance between the two transducers 3.

[0053] A limiting component 47 is provided between at least one of the swinging components and the mounting base 41, the limiting component 47 being used to provide rotational resistance to the swinging component.

[0054] In this embodiment, two limiting components 47 are provided, and each of the two swinging members is provided with a limiting component 47 between it and the mounting base 41. In other embodiments, only one limiting component 47 may be provided.

[0055] like Figure 4 and Figure 5 As shown, the limiting component 47 includes: a chuck 471, a groove 472, a mounting plate 473, and a telescopic member 474; the chuck 471 is disposed on the rotating shaft 49; the chuck 471 has a plurality of grooves 472 arranged around the axis of the rotating shaft 49; the mounting plate 473 is disposed on the mounting base 41; the mounting plate 473 is provided with at least one telescopic member 474, and the telescopic end of the telescopic member 474 is located in the groove 472;

[0056] Specifically, the chuck 471 is fixed to the rotating shaft 49 and rotates with the shaft. Its surface has multiple grooves 472 evenly distributed around the shaft center. The grooves 472 are hemispherical and are used to mate with the spheres 4743 of the telescopic component 474. The mounting plate 473 is fixed to the mounting base 41.

[0057] In this embodiment, two telescopic components 474 are provided. In other embodiments, the number may be increased. Both telescopic components 474 are fixedly connected to the inner side of the mounting plate 473. The telescopic component 474 includes a sliding sleeve 4741, a sliding rod 4742, a ball 4743, and an elastic element.

[0058] A sliding sleeve 4741 is mounted on a mounting plate 473, and a sliding rod 4742 is slidably connected to the sliding sleeve 4741. A ball 4743 is provided at the end of the sliding rod 4742 away from the sliding sleeve 4741, and the shape of the groove 472 is adapted to the shape of the ball 4743. An elastic element is provided between the sliding rod 4742 and the sliding sleeve 4741, preferably a spring 4744. It is worth noting that the sliding rod 4742 slides inside the sliding sleeve 4741, and the ball 4743 is fixedly connected to the front end. One end of the spring 4744 is fixedly connected to the rear end of the sliding rod 4742, and the other end is fixedly connected to the inner bottom wall of the sliding sleeve 4741. The limiting component 47 is used to provide rotational resistance, realize the staged positioning of the swinging component, and prevent accidental movement.

[0059] Furthermore, a handle 44 is provided on the mounting base 41.

[0060] Specifically, a handle 44 is fixedly connected to the mounting base 41. The handle 44 facilitates hand operation and improves user comfort.

[0061] Furthermore, a shield 48 is provided between the two levers 42, and the shield 48 is flexibly positioned above the gear set 410.

[0062] Specifically, the shield 48 covers the gear 410 group to prevent impurities from entering the gear 410 group. The material is flexible rubber or silicone. The shield 48 is arc-shaped or flat and its two ends are fixed between the two swing rods 42.

[0063] The working principle of this utility model is as follows:

[0064] The operator holds handle 44 and places the two transducers 3 on the concrete surfaces on either side of the crack, ensuring that the bottom surface of the transducer 3 is in close contact with the surface to be measured. By manually rotating one of the swing arms 42, the swing arm 42 drives the gear 410 on its shaft 49 to rotate. Since the two gears 410 mesh with each other, the power is synchronously transmitted to the other gear 410, driving the other swing arm 42 to rotate in the opposite direction at the same angle. This achieves synchronous and symmetrical movement of the two transducers 3 on both sides of the crack, ensuring that the line connecting them is always perpendicular to the crack direction and symmetrical about the crack centerline. During the adjustment process, the indicator arrow 46 fixed on the swing arm 42 rotates with the swing arm 42, pointing to the arc-shaped scale 45 on the mounting base 41, allowing the operator to visually read the current straight-line distance between the two transducers 3. At the same time, the ball 4743 in the limiting component 47 is engaged in the groove 472 of the chuck 471 under the action of the spring 4744, providing a sense of staged positioning and rotational resistance, preventing slippage after adjustment, and improving adjustment accuracy and feel. After adjusting to a suitable distance, the host unit 1 starts the measurement program. The host unit 1 controls one transducer 3 to emit an ultrasonic signal. This signal propagates through the concrete, is reflected or diffracted at the bottom of the crack, and is received by another transducer 3. The host unit 1 receives the signal from the transducer 3 through the data line 2, calculates the propagation time of the ultrasonic wave in the concrete, and, combined with the known sound velocity and the current spacing between the transducers 3, automatically calculates the crack depth using the principle of cross-crack depth measurement, such as the ultrasonic diffraction time-of-flight method. The calculation result is displayed on the screen of the host unit 1 in real time and can be stored or output.

[0065] The present invention can achieve the following beneficial effects:

[0066] The synchronous counter-rotation of the two transducers 3 is achieved through gear set 410, ensuring that the two transducers 3 always move synchronously with the center of the mounting base 41 as the symmetrical point during the adjustment process. This fundamentally solves the problem that traditional slide rail adjustment cannot guarantee the symmetry of the transducers 3 with the crack centerline, reduces the measurement error introduced by alignment deviation, and significantly improves the accuracy and reliability of crack depth measurement.

[0067] By operating with only one hand and rotating a lever 42, the spacing between the two transducers 3 can be adjusted synchronously, eliminating the need to adjust each transducer 3 separately as in traditional methods. This simplifies the operation and saves adjustment time, greatly improving work efficiency and ease of operation, especially in testing applications with limited space or requiring frequent adjustments.

[0068] The limiting component 47, through the engagement of the ball 4743 pressed by the spring 4744 and the groove 472 of the chuck 471, provides a distinct "click" feel for phased positioning and continuous rotational resistance. This not only makes the adjustment process clear and easy to control, but also effectively prevents the pendulum 42 from rotating accidentally due to the instrument's own weight or slight impacts, ensuring the stability of the set interval and thus ensuring the repeatability of the measurement conditions.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bridge tunnel crack depth measuring instrument, comprising: Host; Two transducers are connected to the host computer via data cables; And a spacing adjustment mechanism for adjusting the distance between the two transducers; The feature is that the spacing adjustment mechanism includes: Mounting base; The two swinging components are rotatably connected to both sides of the mounting base; the two transducers are respectively disposed at the ends of the two swinging components. A gear set disposed between the two said oscillating members; rotation of one of the oscillating members drives the other oscillating member to rotate synchronously via the gear set. The scale and indicator arrow, wherein the indicator arrow is provided on one of the swing members, and the scale is provided on the mounting base, and the indicator arrow cooperates with the scale to indicate the current distance between the two transducers; A limiting component, wherein at least one of the swing members is disposed between the swing member and the mounting base, the limiting component being used to provide rotational resistance to the swing member.

2. The bridge tunnel crack depth measuring instrument according to claim 1, characterized in that, The swing element includes: A swing arm and a rotating shaft, wherein the swing arm is provided with the rotating shaft, and the swing arm is rotatably connected to the mounting base through the rotating shaft; The mounting sleeve is provided on the swing arm, and the transducer is detachably installed inside the mounting sleeve.

3. The bridge tunnel crack depth measuring instrument according to claim 2, characterized in that, The gear set includes two gears, one of which is mounted on the shaft of one of the oscillating members, and the other gear is mounted on the shaft of the other oscillating member, and the two gears mesh.

4. The bridge tunnel crack depth measuring instrument according to claim 2, characterized in that, The limit components include: A chuck, the chuck being mounted on the rotating shaft; The chuck has a plurality of grooves arranged around the axis of the rotating shaft; The mounting disk is provided on the mounting base; The mounting plate is provided with at least one telescopic component, and the telescopic end of the telescopic component is located in the groove.

5. The bridge tunnel crack depth measuring instrument according to claim 4, characterized in that, The telescopic component includes: A sliding sleeve, which is disposed on the mounting plate; The slide rod is slidably connected to the sliding sleeve; A sphere, the sphere being disposed at the end of the slide rod away from the slide sleeve, the shape of the groove being adapted to the shape of the sphere; An elastic element is provided between the slide rod and the slide sleeve.

6. The bridge tunnel crack depth measuring instrument according to claim 1, characterized in that, The bridge tunnel crack depth measuring instrument also includes: Handle, the handle provided on the mounting base.

7. The bridge tunnel crack depth measuring instrument according to claim 2, characterized in that, The bridge tunnel crack depth measuring instrument also includes: A shield, a shield disposed between the two swing arms, the shield being flexibly positioned above the gear set.

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