A test tool for measuring a photoelectric deflection instrument and a measurement method thereof

Abstract

The application provides a kind of measuring photoelectric deflection gauge test tool and its measuring method, the measuring photoelectric deflection gauge test tool includes mounting piece, for stabilizing support entire test tool;Target is installed on the mounting piece by movement component, the movement component is configured as the target installed on it is moved to different height, and the target can be used with photoelectric deflection gauge, to simulate the deflection of bridge;Range finder is installed on the mounting piece, for measuring the horizontal distance between photoelectric deflection gauge and the target;Measuring piece is installed on the mounting piece, and is matched with the movement component, the measuring piece is used for real-time acquisition height value of the target, wherein, the range finder and the measuring piece are matched, to meet the test of photoelectric deflection gauge, to meet the dynamic monitoring of field bridge deflection gauge, installation is simple and convenient reliable, can short time measuring deflection gauge data accuracy.

Description

Technical Field

[0001] This invention belongs to the field of bridge monitoring technology, and specifically relates to a testing fixture for measuring photoelectric deflection and its measurement method. Background Technology

[0002] In the current field of measurement technology, photoelectric deflectometers, as a high-precision measuring tool, are widely used in various situations requiring accurate measurement of object deflection or displacement. However, commercially available photoelectric deflectometers generally have some problems that limit their versatility and flexibility in practical applications.

[0003] First, photoelectric deflectometers are generally expensive, which increases their operating costs and makes them unaffordable for some users or research institutions with limited budgets. Furthermore, the application scenarios for photoelectric deflectometers are relatively limited, especially in long-distance outdoor measurements, where environmental factors and limitations often compromise measurement accuracy and stability.

[0004] Secondly, the measuring fixtures of photoelectric deflectometers are typically highly precise and relatively large, requiring use in specific environments such as laboratories. This limitation significantly restricts the application of photoelectric deflectometers in outdoor or field measurements, making them unsuitable for some urgent or special situations.

[0005] Furthermore, commercially available photoelectric deflectometers often suffer from target mismatch issues. Because different users or research institutions use varying types of testing fixtures and targets, it is difficult to find a photoelectric deflectometer that perfectly matches all measurement needs. This mismatch not only affects measurement accuracy but also increases the user's operational difficulty and time costs.

[0006] Finally, the photoelectric deflectometers currently used in laboratories typically employ a limited measurement method, measuring only in one fixed direction and requiring the object to be tested to be placed on a specific testing fixture. This method not only restricts the flexibility and versatility of measurements but also makes the measurement process cumbersome and complex. Furthermore, because measurements can only be performed on-site, real-time remote monitoring and analysis of the measurement data are impossible.

[0007] In summary, current photoelectric deflectometers on the market suffer from high prices, limited application scenarios, incompatible measurement fixtures, and a single measurement method. These issues restrict the versatility and flexibility of photoelectric deflectometers in practical applications. Therefore, it is necessary to improve and optimize photoelectric deflectometers to enhance their measurement accuracy, stability, and applicability, thereby meeting the measurement needs of more users and research institutions. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides a testing fixture for measuring photoelectric deflection and its measurement method, thereby resolving the technical issues described in the background section.

[0009] On the one hand, the invention provides the following technical solution: a test fixture for measuring photoelectric deflection, including a mounting component for stably supporting the entire test fixture;

[0010] A target is mounted on the mounting via a motion component configured to move the target mounted thereon to different heights and enable the target to be used in conjunction with a photoelectric deflectometer to simulate the deflection of a bridge.

[0011] A rangefinder, mounted on the mounting component, is used to measure the horizontal distance between the photoelectric deflectometer and the target;

[0012] A measuring element, which is mounted on the mounting component and adapted to the motion component, is used to acquire the height value of the target in real time;

[0013] The rangefinder and the measuring component are adapted to meet the testing requirements of the photoelectric deflectometer.

[0014] Compared with existing technologies, the advantages of this invention are as follows: The testing fixture is installed and fixed on a horizontal surface; the current position of the testing fixture is set as the starting position for caliper measurement, and the data on the caliper display screen is zeroed. By rotating the drive handle of the motion component, the target is adjusted to a suitable position to simulate the deflection of a bridge, while the target simultaneously drives the vernier scale of the caliper. The height distance of the vernier scale is obtained using the caliper display screen, and the first horizontal distance from the photoelectric deflectometer to the target is measured using a rangefinder. The vertical distance of the target's movement is obtained using the photoelectric deflectometer, and the second horizontal distance from the target to the photoelectric deflectometer is also obtained. The first horizontal distance is compared with the second horizontal distance, and the height distance is compared with the vertical distance. If the first horizontal distance is inconsistent with the second horizontal distance, and / or the data on the caliper display screen is inconsistent with the vertical distance, an alarm signal is issued. Due to the simple structure of the testing fixture, it can be used both indoors and outdoors, with high measurement accuracy. This testing fixture is relatively simple to manufacture and has low cost. Through the up-and-down movement of the target, one photoelectric deflectometer can simultaneously measure data from multiple targets at different distances. Horizontal distance measurement utilizes a high-precision laser rangefinder, while vertical distance measurement employs a high-precision vernier caliper. This system can meet the dynamic monitoring requirements of bridge deflection meters on-site. Installation is simple, convenient, and reliable, allowing for accurate measurement of deflection meter data in a short time. It can be used on-site on bridges, in indoor and outdoor laboratories, for measuring photoelectric deflection meters.

[0015] Furthermore, the motion component includes a lead screw disposed on the mounting member, a movable block disposed on the lead screw, and a drive handle for driving the lead screw to move, the drive handle extending to the outside of the mounting member.

[0016] Furthermore, the motion component also includes a limiting post mounted on the mounting member, the limiting post being adapted to the movable block, and the limiting post being used to limit the movement of the movable block along the limiting post.

[0017] Furthermore, the mounting component includes a mounting plate and vertical plates detachably disposed at both ends of the mounting plate. The two vertical plates form an accommodating space on one side of the mounting plate to facilitate the movement of the target.

[0018] Furthermore, a support block is mounted on the mounting plate, the support block being adapted to one of the vertical plates to form the motion space, and the support block being used to mount the measuring element.

[0019] Furthermore, a through hole is provided on the other vertical plate.

[0020] Furthermore, the target includes a bracket mounted on the motion component and a target body mounted on the bracket. The bracket includes a fixing plate, and connecting plates are bent at both ends of the fixing plate toward the target body so that a movable space is formed between the two connecting plates.

[0021] Furthermore, the target is mounted on the bracket via an adjusting member, allowing the target to rotate around the bracket within the movable space. The adjusting member includes a rotating head and a fastening nut: the rotating head is used to connect the target to the bracket, and the fastening nut is used to lock or unlock the rotating head to fix the target at the desired angle.

[0022] Furthermore, the measuring component includes calipers, a caliper display connected to the calipers, and a connecting block connected to the caliper display. The connecting block is connected to the target to obtain the height value of the target. The two bottom surfaces of the calipers are flush with the two bottom surfaces of the mounting component.

[0023] On the other hand, the present invention also proposes a measurement method for a test fixture for measuring photoelectric deflection meters, the measurement method comprising the following steps:

[0024] Fix the test fixture on a horizontal surface;

[0025] Set the current position of the test fixture to the starting position of the caliper measurement, and reset the data on the caliper display screen to zero;

[0026] By rotating the drive handle of the motion component, the target is adjusted to a suitable position to simulate the deflection of a bridge, while the target drives the vernier scale of the caliper to move.

[0027] The height distance of the vernier scale is obtained using the caliper display screen, and the first horizontal distance from the photoelectric deflector to the target is measured using a rangefinder.

[0028] The vertical distance of the target's movement is obtained using a photoelectric deflectometer, and the second horizontal distance from the target to the photoelectric deflectometer is also obtained.

[0029] Compare whether the first horizontal distance and the second horizontal distance are the same, and compare whether the height distance and the vertical distance are the same;

[0030] If the first horizontal distance is inconsistent with the second horizontal distance, and / or the data on the caliper display is inconsistent with the vertical distance, an alarm signal will be issued. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of the testing fixture for measuring photoelectric deflection in the first embodiment of the present invention.

[0032] Figure 2 This is a side view of the test fixture for measuring the photoelectric deflection meter in the first embodiment of the present invention.

[0033] Figure 3 This is a side view of the target in the first embodiment of the present invention.

[0034] Figure 4 This is the first embodiment of the present invention. Figure 2 Enlarged diagram of point A in the middle.

[0035] Figure 5 This is the first embodiment of the present invention. Figure 3 Sectional view at point BB.

[0036] Figure 6 This is a flowchart of the measurement method for the test fixture of the photoelectric deflectometer in the second embodiment of the present invention.

[0037] Key component symbols: 10. Mounting part; 11. Mounting plate; 12. Vertical plate; 13. Accommodation space; 14. Support block; 15. Movement space; 16. Through hole; 20. Target; 21. Bracket; 211. Fixing plate; 212. Connecting plate; 213. Movement space; 22. Target body; 23. Adjusting part; 231. Rotating head; 232. Fastening nut; 30. Motion assembly; 31. Lead screw; 32. Moving block; 33. Drive handle; 34. Limiting post; 40. Rangefinder; 50. Measuring part; 51. Caliper; 52. Caliper display; 53. Connecting block; 531. Mounting part; 532. Connecting part; 533. Limiting groove; 534. Fixing screw.

[0038] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0039] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0040] 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.

[0041] 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 in the description of the invention 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.

[0042] Please see Figures 1 to 2 As shown, this is the test fixture for measuring the photoelectric deflection meter according to the first embodiment of the present invention.

[0043] Mounting component 10 is used to stably support the entire test fixture;

[0044] A target 20 is mounted on the mounting member 10 via a motion component 30, the motion component 30 being configured to move the target 20 mounted thereon to different heights and enable the target 20 to be used in conjunction with a photoelectric deflectometer to simulate the deflection of a bridge.

[0045] A rangefinder 40 is mounted on the mounting component 10 and is used to measure the horizontal distance between the photoelectric deflectometer and the target 20.

[0046] A measuring element 50 is mounted on the mounting element 10 and adapted to the motion component 30. The measuring element 50 is used to acquire the height value of the target 20 in real time.

[0047] The rangefinder 40 and the measuring component 50 are adapted to meet the testing requirements of the photoelectric deflectometer.

[0048] In practical application, the testing fixture is installed and fixed on a horizontal surface. The current position of the testing fixture is set as the starting position for the measurement of caliper 51, and the data on the display screen of caliper 51 is zeroed. By rotating the drive handle 33 of the motion component 30, the target 20 is adjusted to a suitable position to simulate the deflection of a bridge. At the same time, the target 20 drives the vernier scale of caliper 51 to move. The height distance of the vernier scale is obtained using the display screen of caliper 51, and the first horizontal distance from the photoelectric deflectometer to the target 20 is measured using the rangefinder 40. The vertical distance of the target 20 is obtained using the photoelectric deflectometer, and the second horizontal distance from the target 20 to the photoelectric deflectometer is obtained. The first horizontal distance and the second horizontal distance are compared to see if they are consistent, and the height distance and the vertical distance are compared to see if they are consistent. If the first horizontal distance and the second horizontal distance are inconsistent, and / or the data on the display screen of caliper 51 is inconsistent with the vertical distance, an alarm signal is issued. Due to the simple structure of the testing fixture, it can be used outdoors and indoors, with high measurement accuracy. This testing fixture is relatively simple to manufacture and has low cost. By moving the target 20 up and down, a single photoelectric deflectometer can simultaneously measure data from multiple targets 20 at different distances. Horizontal distance measurement utilizes a high-precision laser rangefinder 40 (rangefinder 40), while vertical distance measurement employs a high-precision vernier caliper 51 (measuring element 50). This system can meet the dynamic monitoring needs of bridge deflectometers on-site, is simple, convenient, and reliable to install, and can accurately measure deflectometer data in a short time. It can be used for measuring photoelectric deflectometer data on bridges, in indoor and outdoor laboratories.

[0049] As can be seen, the testing fixture can effectively solve the problems of long-distance indoor and outdoor testing, mobile testing methods, multiple different scenarios, and is suitable for different targets 20. It can be easily replaced, and the height of the testing fixture is adjustable (the specific distance can be viewed through the vernier caliper 51).

[0050] In this embodiment, the rangefinder 40 is a laser rangefinder 40. The laser rangefinder 40 measures the horizontal distance from the photoelectric deflectometer to the target 20. The accuracy of this distance can reach the millimeter level, and the measurement method is reliable and fast.

[0051] Specifically, the motion component 30 includes a lead screw 31 disposed on the mounting member 10, a movable block 32 disposed on the lead screw 31, and a drive handle 33 that drives the lead screw 31 to move, the drive handle 33 extending to the outside of the mounting member 10.

[0052] More specifically, the motion component 30 also includes a limiting post 34 mounted on the mounting member 10. The limiting post 34 is adapted to the movable block 32, and the limiting post 34 is used to limit the movement of the movable block 32 along the limiting post 34.

[0053] Specifically, the mounting component 10 includes a mounting plate 11 and vertical plates 12 detachably disposed at both ends of the mounting plate 11. The two vertical plates 12 form an accommodating space 13 on one side of the mounting plate 11 to facilitate the movement of the target 20. The mounting plate 11 and the vertical plates 12 are bolted together.

[0054] More specifically, a support block 14 is mounted on the mounting plate 11, and the support block 14 is adapted to one of the vertical plates 12 to form the motion space 15. The support block 14 is used to mount the measuring element 50. A through hole 16 is provided on the other vertical plate 12.

[0055] Please see Figure 3 As shown, specifically, the target 20 includes a bracket 21 mounted on the motion component 30, and a target body 22 mounted on the bracket 21. The bracket 21 includes a fixing plate 211, and connecting plates 212 are bent at both ends of the fixing plate 211 towards the target body 22, so that a movable space 213 is formed between the two connecting plates 212. In this embodiment, the bracket 21 is fixed to the movable block 32 of the motion component 30 by bolts.

[0056] Furthermore, the target 22 is mounted on the bracket 21 via an adjusting member 23, allowing the target 22 to rotate around the bracket 21 within the movable space 213. The adjusting member 23 includes a rotating head 231 and a fastening nut 232: the rotating head 231 connects the target 22 to the bracket 21, and the fastening nut 232 locks or unlocks the rotating head 231 to fix the target 22 at a desired angle. By unlocking the rotating head 231 with the fastening nut 232, the target 22 can rotate relative to the bracket 21, thereby adjusting the angle between the target 22 and the movable block 32. After adjusting to a suitable angle, the fastening nut 232 locks the rotating head 231.

[0057] Please see Figures 4 to 5As shown, the measuring component 50 further includes a caliper 51, a caliper 51 display connected to the caliper 51, and a connecting block 53 connected to the caliper 51 display. The connecting block 53 is connected to the target 20 to obtain the height value of the target 20. The two bottom surfaces of the caliper 51 are flush with the two bottom surfaces of the mounting component 10. The connecting block 53 includes a mounting portion 531, a connecting portion 532 connected to the mounting portion 531, a limiting groove 533 formed on the connecting portion 532, and a fixing screw 534. The mounting portion 531 and the connecting portion 532 are arranged in an L-shape. The top of the limiting groove 533 penetrates the top of the connecting portion 532. The mounting portion 531 is mounted on the caliper 51 display. In this embodiment, a vernier scale is provided on the caliper 51, and the caliper 51 display and the connecting block 53 are mounted on the vernier scale. In practical application, first align the connecting part 532 of the connecting block 53 on the caliper 51 display with the movable block 32 of the moving component 30, then pass the fixing screw 534 through the limiting groove 533 and the threaded hole on the movable block 32 in sequence, and then tighten the fixing screw 534 to connect the connecting part 532 and the movable block 32 together, thereby connecting the caliper 51 display and the movable block 32 together.

[0058] Example 2

[0059] Please see Figure 6 The figure shows a test fixture measurement method for measuring photoelectric deflection meter according to the second embodiment of the present invention. The method includes the following steps: steps S01 to S07.

[0060] S01, Fix the test fixture on a horizontal surface;

[0061] S02, set the current position of the test fixture to the starting position of the caliper measurement, and reset the data on the caliper display screen to zero;

[0062] S03, by rotating the drive handle of the motion component, the target is adjusted to a suitable position to simulate the deflection of the bridge, and at the same time the target drives the vernier scale of the caliper to move.

[0063] S04, use the caliper display screen to obtain the height distance of the vernier scale, and use the rangefinder to measure the first horizontal distance from the photoelectric deflector to the target;

[0064] S05, use a photoelectric deflectometer to obtain the vertical distance of the target's movement, and obtain the second horizontal distance from the target to the photoelectric deflectometer;

[0065] S06, compare whether the first horizontal distance and the second horizontal distance are the same, and compare whether the height distance and the vertical distance are the same;

[0066] S07, if the first horizontal distance is inconsistent with the second horizontal distance, and / or the data on the caliper display is inconsistent with the vertical distance, an alarm signal shall be issued.

[0067] In summary, the testing fixture and measurement method for measuring the photoelectric deflectometer in the above embodiments of the present invention involve installing the testing fixture on a horizontal surface, setting the current position of the testing fixture as the starting position for caliper measurement, and zeroing the data on the caliper display screen. By rotating the drive handle of the motion component, the target is adjusted to a suitable position to simulate the deflection of a bridge, while the target simultaneously drives the vernier scale of the caliper. The height distance of the vernier scale is obtained using the caliper display screen, and the first horizontal distance from the photoelectric deflectometer to the target is measured using a rangefinder. The vertical distance of the target movement is obtained using the photoelectric deflectometer, and a second horizontal distance is obtained from the target to the photoelectric deflectometer. The first horizontal distance and the second horizontal distance are compared to see if they are consistent, and the height distance is compared to see if the vertical distance is consistent. If the first horizontal distance and the second horizontal distance are inconsistent, and / or the data on the caliper display screen is inconsistent with the vertical distance, an alarm signal is issued. Due to the simple structure of the testing fixture, it can be used both outdoors and indoors, with high measurement accuracy. This testing fixture is relatively simple to manufacture and has low cost. By manipulating the vertical movement of the targets, a single photoelectric deflectometer can simultaneously measure data from multiple targets at different distances. Horizontal distance measurement utilizes a high-precision laser rangefinder, while vertical distance measurement employs a high-precision vernier caliper. This system meets the dynamic monitoring requirements of bridge deflectometers in the field, offering simple, convenient, and reliable installation. It can accurately measure deflectometer data in a short time. The photoelectric deflectometer can be used for measurements on bridges, in indoor and outdoor laboratories.

[0068] As can be seen, the testing fixture can effectively solve the problems of long-distance indoor and outdoor testing, mobile testing methods, multiple different scenarios, applicable to different targets, and easy to replace. The height of the testing fixture is adjustable (the specific distance can be viewed using a vernier caliper).

[0069] In the description of this specification, 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 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 the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A testing fixture for measuring photoelectric deflection, characterized in that, include: Mounting components are used to stably support the entire test fixture; A target is mounted on the mounting via a motion component configured to move the target mounted thereon to different heights and enable the target to be used in conjunction with a photoelectric deflectometer to simulate the deflection of a bridge. A rangefinder, mounted on the mounting component, is used to measure the horizontal distance between the photoelectric deflectometer and the target; A measuring element, which is mounted on the mounting component and adapted to the motion component, is used to acquire the height value of the target in real time; The rangefinder and the measuring component are adapted to meet the testing requirements of the photoelectric deflectometer. The motion component includes a lead screw mounted on the mounting member, a movable block mounted on the lead screw, and a drive handle that drives the lead screw to move. The drive handle extends to the outside of the mounting member. The mounting member includes a mounting plate and vertical plates detachably mounted at both ends of the mounting plate. The two vertical plates form an accommodating space on one side of the mounting plate to facilitate the movement of the target. The target includes a bracket mounted on the motion component and a target body mounted on the bracket. The bracket includes a fixed plate, and connecting plates are bent at both ends of the fixed plate towards the target body to form a movable space between the two connecting plates. The measuring component includes calipers, a caliper display connected to the calipers, and a connecting block connected to the caliper display. The connecting block is connected to the target to obtain the height value of the target. The two bottom surfaces of the calipers are flush with the two bottom surfaces of the mounting member.

2. The testing fixture for measuring photoelectric deflection according to claim 1, characterized in that, The motion component further includes a limiting post mounted on the mounting member, the limiting post being adapted to the movable block, and the limiting post being used to restrict the movement of the movable block along the limiting post.

3. The testing fixture for measuring photoelectric deflection according to claim 1, characterized in that, A support block is mounted on the mounting plate, and the support block is adapted to one of the vertical plates to form the accommodating space. The support block is used to mount the measuring element.

4. The testing fixture for measuring photoelectric deflection according to claim 3, characterized in that, Another vertical plate has a through hole.

5. The testing fixture for measuring photoelectric deflection according to claim 1, characterized in that, The target is mounted on the bracket by an adjusting member so that the target can rotate around the bracket within the movable space. The adjusting member includes a rotating head and a fastening nut: the rotating head is used to connect the target to the bracket, and the fastening nut is used to lock or unlock the rotating head to fix the target at the desired angle.

6. A measurement method for a test fixture for measuring a photoelectric deflectometer according to any one of claims 1 to 5, characterized in that, The method includes the following steps: Fix the test fixture on a horizontal surface; Set the current position of the test fixture to the starting position of the caliper measurement, and reset the data on the caliper display screen to zero; By rotating the drive handle of the motion component, the target is adjusted to a suitable position to simulate the deflection of a bridge, while the target drives the vernier scale of the caliper to move. The height distance of the vernier scale is obtained using the caliper display screen, and the first horizontal distance from the photoelectric deflector to the target is measured using a rangefinder. The vertical distance of the target's movement is obtained using a photoelectric deflectometer, and the second horizontal distance from the target to the photoelectric deflectometer is also obtained. Compare whether the first horizontal distance and the second horizontal distance are the same, and compare whether the height distance and the vertical distance are the same; If the first horizontal distance is inconsistent with the second horizontal distance, and / or the height distance is inconsistent with the vertical distance, an alarm signal will be issued.

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