A measuring area automatic projection positioning device for concrete rebound detection

Abstract

The application relates to the technical field of highway engineering detection, and discloses a measuring area automatic projection positioning device for concrete rebound detection. Parallel guide rails and a slidable moving seat are arranged to constrain the moving path of a projection host on a straight line parallel to a concrete beam plate component. After the detection of one measuring area is completed, an operator can easily and smoothly push the whole device to the next work station along the guide rails. The mechanical structure fundamentally guarantees the consistency and positioning accuracy of the projection interval of adjacent measuring areas, the tedious steps of manual measurement and positioning are omitted each time, and the work efficiency of continuous, large-scale batch detection is improved in quality. The application adopts manual smearing of a projection belt body to mark, so that no pollution or physical damage is caused to the surface of the concrete component, the original appearance of the building is maintained, and the application is particularly suitable for detection occasions with strict requirements on the cleanliness of finished surfaces or occasions where marking is not allowed.

Description

Technical Field

[0001] This application relates to the field of highway engineering testing technology, specifically to an automatic projection positioning device for concrete rebound testing. Background Technology

[0002] In highway bridge construction, box girders, as the main load-bearing precast components, have concrete strength as a key indicator for quality control. The rebound method, a commonly used on-site non-destructive testing method, is widely applied in strength testing at box girder precast yards. According to relevant standards such as the "Standards for Quality Inspection and Evaluation of Highway Bridge Engineering," rebound testing is required on the web, bottom slab, and other parts of the precast box girder, with multiple specified test areas delineated on their surface. Each test area is a square region containing 16 squares.

[0003] Currently, in precast beam yards, the delineation of these testing areas relies entirely on manual operation. Inspectors must manually delineate the testing areas. For large box girder components, the number of testing areas to be delineated is large, and manual delineation is extremely inefficient, severely restricting the production and inspection pace of precast beams. Secondly, manually delineating testing areas leaves permanent marks on the surface of precast components, seriously affecting the product's appearance and cleanliness. For components with high appearance standards, secondary cleaning or even surface repair is often required, increasing additional costs. Utility Model Content

[0004] In view of the above problems, this application provides an automatic projection positioning device for concrete rebound testing, which can realize fast, accurate, and non-destructive marking, thus completely overcoming the inherent defects of manual marking methods, such as being time-consuming, labor-intensive, inaccurate, and affecting the aesthetics of components.

[0005] According to one aspect of the embodiments of this application, an automatic projection positioning device for concrete rebound testing is provided. The automatic projection positioning device for concrete rebound testing includes: two parallel guide rails; a movable base, the bottom of which is slidably mounted on the guide rails via a rotating wheel, the rotating wheel being equipped with a braking device for locking its position; a support frame, the lower end of which is fixed to the movable base; and a projection host, disposed at the upper end of the support frame. The projection host includes a housing, an input module disposed on the housing, and a projection module and a control processing unit housed within the housing. The control processing unit is electrically connected to the projection module and the input module, and is used to control the projection module based on parameters received by the input module to project a test area projection on the surface of the concrete component, consisting of an outer boundary and a plurality of uniformly divided internal sub-grids.

[0006] In some embodiments, the support frame is a height-adjustable telescopic rod structure.

[0007] In some embodiments, the support frame includes a first horizontal plate and a second horizontal plate arranged sequentially from top to bottom, a leveling knob is provided between the first horizontal plate and the second horizontal plate, and three telescopic rods are hinged below the second horizontal plate.

[0008] In some embodiments, three fixed seats are provided above the movable seat, and a circular turntable is rotatably provided above the fixed seats. A socket tube that matches the lower end of the telescopic rod is hinged above the circular turntable. The socket tube is provided with a socket opening, and a tightening bolt extending into the socket opening is provided on the outer wall of the socket tube.

[0009] In some embodiments, the input module is one or more combinations of a touch screen, physical buttons, or knobs.

[0010] In some embodiments, a rangefinder fixedly mounted on the housing is also included, the rangefinder being electrically connected to the control processing unit.

[0011] The beneficial effects of this application are: 1. This utility model constrains the movement path of the projection host to a straight line parallel to the concrete beam and slab components by setting up parallel guide rails and a sliding movable base. After completing the inspection of one test area, the operator can easily and smoothly move the entire device to the next workstation along the guide rails. This mechanical structure fundamentally ensures the consistency of the projection spacing and positioning accuracy of adjacent test areas, eliminating the tedious steps of manual measurement and positioning each time, and greatly improving the efficiency of continuous, large-scale batch inspection work.

[0012] 2. This application uses optical projection to replace the traditional manual marking method, which will not cause any pollution or physical damage to the surface of concrete components, and maintains the original appearance of the building. It is particularly suitable for testing occasions where the cleanliness of the finished surface is strictly required or marking is not allowed.

[0013] 3. In this application, the support frame adopts an adjustable height telescopic rod structure, supplemented by leveling knobs, hinged telescopic rods, and socket tubes with tightening bolts, etc., so that the device can flexibly adapt to different on-site working conditions, quickly complete leveling and fixing, and ensure that the projector host can be in a stable and optimal working posture in various complex environments.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the installation structure provided in the embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the device provided in the embodiments of this application; Figure 3 This is a partial structural diagram of the device provided in an embodiment of this application.

[0016] The reference numerals in the detailed embodiments are as follows: An automatic projection positioning device for concrete rebound testing includes: a guide rail 110, a movable seat 120, a rotating wheel 121, a braking device 121a, a fixed seat 122, a circular turntable 123, a socket tube 124, a socket 124a, a tightening bolt 124b, a support frame 130, a first horizontal plate 131, a second horizontal plate 132, a telescopic rod 133, a leveling knob 134, a projection host 140, a rangefinder 150, and a box girder 200. Detailed Implementation

[0017] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. 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 application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings, are intended to cover non-exclusive inclusion.

[0018] For details, please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the installation structure provided in the embodiments of this application. Figure 2 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application. Figure 3This is a partial structural diagram of the equipment provided in this application embodiment. This equipment is mainly used in the inspection of precast beams in highway bridge factories, for delineating the test area before conducting rebound testing on the concrete strength of large precast box girders 200. The automatic projection positioning device 100 for concrete rebound testing includes two parallel guide rails 110. The guide rails 110 can be made of aluminum alloy, and their length can be extended by splicing according to the length of the beam to be tested on one side. The guide rails 110 can be fixed to a flat surface in the factory using conventional components such as anchor bolts. The length direction of the guide rails 110 needs to be parallel to the axis of the precast box girder 200 to be tested. Typically, during the testing process, a lifting device is used to transport the precast box girder to be tested to the testing station. Therefore, the guide rails 110 can be set and adjusted according to the testing station to ensure that the length direction of the guide rails 110 is basically parallel to the axis of the precast box girder 200 to be tested during the testing process. The movable base 120 is slidably mounted on the guide rail 110 via a rotating wheel 121. A braking device 121a is provided at the rotating wheel 121 to lock its position. The support frame 130 is fixed at its lower end to the movable base 120. The movable base 120 supports the main components such as the support frame 130 and the projection host 140. The movable base 120 can move under the guidance of the guide rail 110 via the rotating wheel 121, thereby projecting measurement areas sequentially at various positions along the length of the box girder 200. The braking device 121a is used to stop the rotating wheel 121. When the brake pedal is pressed, the movable base 120 can be firmly locked at any position on the guide rail 110 by frictional resistance. The projection host 140 is located at the upper end of the support frame 130. The projection host 140 includes a housing and an input module mounted on the housing. The input module can be one or more combinations of a touch screen, physical buttons, or knobs. The system also includes a projection module and a control processing unit housed within the housing. The control processing unit is electrically connected to the projection module and the input module and is used to control the projection module based on the parameters received by the input module to project a survey area projection consisting of several sub-grids uniformly divided by the outer boundary and the interior onto the surface of the concrete component.

[0019] In this embodiment, during operation, the precast box girder 200 is moved to a specific position on the inspection station. The device is then moved to one end of the guide rail 110. At this time, the projection host 140 is powered on, and the operator inputs inspection parameters, such as distance, number of test areas, and size, through the input module. After receiving these parameters, the control processing unit generates corresponding projection control signals and drives the projection module to project a test area projection onto the outer surface of the precast box girder 200, consisting of several uniformly divided sub-grids along the outer boundary. Subsequently, the moving seat 120 is fine-tuned according to the test area position until the projection is in the ideal position. After the position is determined, the brake device 121a at the operable wheel 121 is operated to lock the moving seat 120 in the current position on the guide rail 110, preventing it from sliding during inspection. Finally, the inspector can perform a rebound inspection on the projected test area. After completing the test area, the brake device 121a is released, and the entire device is moved along the guide rail 110 to the next station. The guide rail 110 ensures the accuracy of the spacing between the test areas and their neat arrangement. Upon reaching the new workstation, the brake device 121a is locked again, allowing for a new round of projection and inspection. This process is repeated until all test areas are inspected. Since each batch of box girders 200 produced in the factory has uniform specifications, the spacing between adjacent test areas is roughly the same. Therefore, markings can be made on the guide rail 110 at certain intervals, facilitating the operator's movement of the entire device to each inspection workstation based on the marked points.

[0020] In some embodiments, the support frame 130 is a height-adjustable telescopic rod structure. In this embodiment, the above-described configuration enables the device to quickly adapt to different heights of the inspection work surface (e.g., from the lower bottom plate of the box girder 200 to the higher web plate of the box girder 200), and the telescopic rod can be retracted for easy storage during transportation and transfer.

[0021] In some embodiments, the support frame 130 includes a first horizontal plate 131 and a second horizontal plate 132 arranged sequentially from top to bottom. A leveling knob 134 is provided between the first horizontal plate 131 and the second horizontal plate 132, and three telescopic rods 133 are hinged below the second horizontal plate 132. In this embodiment, the leveling knob 134 allows for fine-tuning of the horizontal angle of the projection host 140 above the first horizontal plate 131, ensuring the accuracy of the projection reference plane.

[0022] In some embodiments, three fixed seats 122 are provided above the movable base 120. A circular turntable 123 is rotatably provided above the fixed seats 122. A socket tube 124 that matches the lower end of the telescopic rod 133 is hinged above the circular turntable 123. The socket tube 124 has a socket 124a inside, and a tightening bolt 124b extending into the socket 124a is provided on the outer wall of the socket tube 124. In this embodiment, the above arrangement allows the lower end of the telescopic rod 133 to be easily inserted into the socket 124a and easily fixed by the tightening bolt 124b. On the other hand, the support frame 130 can be removed from the movable base 120 for separate support and use.

[0023] In some embodiments, a rangefinder 150 is fixedly mounted on the housing and electrically connected to the control processing unit. In this embodiment, the rangefinder 150 is used to measure the distance between the device and the surface of the concrete component in real time. This data, after being fed back to the control processing unit, can be used to automatically calibrate the projection size, effectively compensating for image magnification or reduction caused by changes in projection distance. This ensures that the projected grid size conforms to standard specifications at any working distance, improving the accuracy and automation of the detection.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although the foregoing embodiments have provided a detailed description of this application, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic projection positioning device for concrete rebound testing, characterized in that, include: Two parallel guide rails; The movable seat is slidably mounted on the guide rail at its bottom via a rotating wheel, and the rotating wheel is equipped with a brake device for locking its position. The support frame is fixed at its lower end to the movable base; The projection host is located at the upper end of the support frame; the projection host includes a housing, an input module disposed on the housing, and a projection module and a control processing unit housed within the housing; The control processing unit is electrically connected to the projection module and the input module, and is used to control the projection module based on the parameters received by the input module to project a survey area projection on the surface of the concrete component, which consists of a number of sub-grids with an outer boundary and an internal uniform division.

2. The automatic projection positioning device for concrete rebound testing according to claim 1, characterized in that, The support frame is a telescopic rod structure with adjustable height.

3. The automatic projection positioning device for concrete rebound testing according to claim 2, characterized in that, The support frame includes a first horizontal plate and a second horizontal plate arranged sequentially from top to bottom. A leveling knob is provided between the first horizontal plate and the second horizontal plate. Three telescopic rods are hinged to the bottom of the second horizontal plate.

4. The automatic projection positioning device for concrete rebound testing according to claim 3, characterized in that, Three fixed seats are provided above the movable seat. A circular turntable is rotatably provided above the fixed seats. A socket tube that matches the lower end of the telescopic rod is hinged above the circular turntable. A socket port is provided inside the socket tube. A tightening bolt extending into the socket port is provided on the outer wall of the socket tube.

5. The automatic projection positioning device for concrete rebound testing according to claim 1, characterized in that, The input module is one or a combination of a touch screen, physical buttons, or knobs.

6. The automatic projection positioning device for concrete rebound testing according to claim 1, characterized in that, It also includes a rangefinder fixedly mounted on the housing, the rangefinder being electrically connected to the control processing unit.

Images