Fixed prism bar calibration device

Abstract

The invention provides a fixed prism bar calibration device which comprises a supporting frame body (1), clamping rod assemblies (2) inserted into the side ends of the supporting frame body (1) in pairs and used for adjusting to clamp the side wall of a prism bar (a), and positioning bolts (3) arranged at the upper end of the supporting frame body (1) in a threaded connection mode, and the lower ends of the positioning bolts (3) stretch out to be used for supporting and abutting against the clamping rod assemblies (2). And the conical fixing groove (4) is arranged at the lower end of the support frame body (1), is positioned on a central shaft of the support frame body (1) and is used for placing the prism bar (a). The clamping rod assembly can be prevented from rotating to influence the fitting degree with the prism rod, the supporting force of the clamping rod assembly on the prism rod is increased, the limiting precision is improved, the position and the vertical precision of the prism rod are guaranteed, manual errors are reduced, the positioning efficiency and the calibration precision are improved, installation and calibration can be completed by one person, and the equipment dependence and the operation threshold are reduced.

Description

Technical Field

[0001] This application belongs to the field of engineering measurement technology, and in particular relates to a fixed prism rod calibration device. Background Technology

[0002] A prism rod is a widely used tool in surveying, engineering measurement, and geographic information systems (GIS). It is primarily used in conjunction with surveying instruments (such as total stations and GPS receivers) to accurately measure distances, angles, and positions. A prism rod calibration device works by fixing the prism rod to a fixed assembly, using high-precision sensors to detect the actual position and state of the prism rod, and adjusting the prism rod accordingly based on the detected parameters until it meets the specified accuracy requirements. Therefore, the calibration accuracy of the prism rod calibration device directly affects the measurement accuracy and is a key tool for ensuring the accuracy, reliability, and efficiency of measurement work.

[0003] The existing prism rod calibration device uses a conventional measuring tripod and an external support arm to fix the prism rod. The bottom of the prism rod is conical. The cone is placed at the measuring point, and the prism is installed at the top of the prism rod. The verticality of the prism rod is adjusted by the measuring tripod support.

[0004] For example, Chinese utility model patent with patent publication number CN214699997U and publication date of November 12, 2021, discloses a total station prism rod fixing device for engineering surveying. The structure includes a steel plate, a bracket, and a base. The bracket is made of four angle steels of equal length welded at equal intervals to the bottom of the steel plate. The top of the bracket is fixedly connected to the steel plate. The steel plate has a circular ring structure and four positioning bolts are horizontally arranged on the steel plate. The four positioning bolts are arranged at equal intervals and threaded to the steel plate. The base has a square frame structure, and the four corners of the base are welded to the bottom of the bracket.

[0005] The general structural principle of the total station prism rod fixing device in this utility model patent is as follows: a total station with laser centering is set up on a relatively flat site and accurately leveled. The instrument is set up at a height of about 1.8m. After leveling, the laser point position on the ground is marked. Secure the base of the prism rod fixing device with a thin thread through the holes in a crisscross pattern. Adjust the four positioning bolts so that the bolts extend to the longest distance from the outer edge of the steel plate. Place the prism rod through the center of the steel plate at the top of the device into the device, and place the device inside the tripod of the total station. Move the device until the intersection of the thin thread coincides with the ground mark. After coincidence, place the tip of the prism rod at the mark. Keeping the position of the tip of the prism rod unchanged, manually adjust the position of the top of the prism rod until the laser point of the total station coincides with the center of the top of the rod and stabilize it. Adjust the four positioning bolts to stabilize the prism rod, and then fine-tune the positioning bolts to make the center of the prism rod coincide with the laser point. Adjust the prism rod's horizontal bubble device to center the bubble. During adjustment, carefully observe whether the tip of the rod moves and whether the center of the top coincides with the laser point.

[0006] However, in actual use, the total station prism rod fixing device still has at least the following two shortcomings, which are the technical problems to be solved by this application: 1. The screw and the rubber block are fixedly connected. When the adjusting screw is rotated, the rubber block rotates accordingly, causing the rubber block to not fit against the side wall of the prism rod, resulting in poor stability of the prism rod and easily affecting the verticality of the prism rod; 2. The marking point needs to be marked and positioned on-site before the tip of the prism rod is inserted, which is slow in positioning efficiency and prone to human operation errors.

[0007] Therefore, in summary, there is an urgent need for a new type of fixed prism rod calibration device that can fit and hold the prism rod and has a pre-positioning function. Summary of the Invention

[0008] This application discloses a fixed prism rod calibration device. By setting up a support frame, a clamping rod assembly, positioning bolts, and a conical fixing groove, it can avoid the clamping rod assembly from rotating and affecting the fit with the prism rod, increase the supporting force of the clamping rod assembly on the prism rod, and pre-position the prism rod after it is placed in the support frame through the conical fixing groove, thereby improving the limiting accuracy, ensuring the position and verticality accuracy of the prism rod, reducing human error, improving positioning efficiency and calibration accuracy, and allowing a single person to complete the installation and calibration, reducing equipment dependence and operating threshold.

[0009] Other objectives and advantages of this application can be further understood from the technical features disclosed herein.

[0010] To achieve one or more of the above objectives or other objectives, this application provides a fixed prism rod calibration device, comprising: a support frame; a pair of clamping rod assemblies inserted into the side end of the support frame and used for adjustment to clamp the side wall of the prism rod; a positioning bolt screwed onto the upper end of the support frame and extending out at the lower end to support the clamping rod assembly; and a tapered fixing groove disposed at the lower end of the support frame and located on the central axis of the support frame for placing the prism rod.

[0011] The support frame includes an upper mounting plate and a lower mounting plate, a through hole disposed on the upper mounting plate for accommodating the prism rod, and four vertical support rods disposed at the four corners of the upper mounting plate for connecting the lower mounting plate.

[0012] The clamping rod assembly includes a plug rod and an arc-shaped plate disposed at the end of the plug rod and used to fit against the outer wall of the prism rod.

[0013] The clamping rod assembly also includes a scale strip disposed on the upper surface of the insertion rod.

[0014] The support frame also includes positioning steel bars disposed on the lower surface of the lower mounting plate and used for inserting into the concrete fixing pier.

[0015] It also includes a leveling bubble device disposed on the upper surface of the upper mounting plate.

[0016] It also includes a guide rod disposed between adjacent vertical support rods and whose axis coincides with the central axis of the upper mounting plate, and a laser rangefinder disposed on the guide rod and used to measure the distance between the prism rod and the support frame.

[0017] There is one guide rod, and at least two laser ranging devices are provided on the guide rod.

[0018] There are two guide rods, which are not opposite to each other, and the laser ranging device is respectively installed on the two guide rods and located at the same horizontal height.

[0019] It also includes an adjustment and mounting assembly that is slidably disposed on the guide rod and used to install the laser ranging device, the laser ranging device being located on the central axis of the upper mounting plate; the adjustment and mounting assembly includes a sleeve sleeved on the guide rod and used to install the laser ranging device, a fixing screw hole disposed on the side end of the sleeve, and a fixing bolt disposed on the fixing screw hole and used to fix the sleeve.

[0020] The technical effects and advantages of this application are as follows: 1. The position of the clamping rod assembly is fixed by positioning bolts, reducing the impact of the rotation of the clamping rod assembly on the accuracy of the prism rod. The horizontal movement of the clamping rod assembly clamps the outer wall of the prism rod, resulting in a large support contact surface, better clamping effect, and reduced impact of external shaking on the verticality of the prism rod; 2. The conical fixing groove pre-positions the prism rod to ensure the position and vertical accuracy of the prism rod. Then, the position of the prism rod is quickly calibrated using a bubble level and a laser rangefinder, reducing human error, improving positioning efficiency and calibration accuracy. Moreover, installation and calibration can be completed by a single person, reducing equipment dependence and operational barriers; 3. The reserved steel bars at the lower end of the support frame are fixed to the concrete fixing pier, ensuring that the calibration accuracy is not affected by shaking of the support frame, resulting in high structural stability and resistance to external forces. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure from the frontal view angle of this application.

[0023] Figure 2 This is a schematic diagram of the connection between the upper mounting plate and the clamping rod assembly from the forward viewing angle of this application.

[0024] Figure 3 This is a top view of the mounting plate and clamping rod assembly in its initial state according to this application.

[0025] Figure 4 This is a front view showing the connection between the upper mounting plate and the clamping rod assembly in this application.

[0026] Figure 5 This is a top view of the upper mounting plate and clamping rod assembly in the clamping state of this application.

[0027] Figure 6 This is a three-dimensional schematic diagram of the support frame in this application.

[0028] Figure 7 This is a schematic diagram illustrating the position adjustment of the mounting components in this application.

[0029] The meanings of the markings in the diagram are as follows: Prism rod a, concrete fixing block b; 1. Support frame; 2. Clamping rod assembly; 3. Positioning bolt; 4. Conical fixing groove; 5. Positioning steel bar; 6. Leveling bubble device; 7. Guide rod; 8. Laser rangefinder; 9. Adjustment and installation assembly. Upper mounting plate 11, lower mounting plate 12, through hole 13, vertical support rod 14, insertion hole 15, first threaded hole 16, extension support plate 17, second threaded hole 18, insertion rod 21, arc plate 22, scale bar 23, sleeve 91, fixing screw hole 92, fixing bolt 93. Detailed Implementation

[0030] The embodiments of this application will be described in detail below with reference to the accompanying drawings. The following description is only a preferred embodiment of this application and is not intended to limit the scope of this application. The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc., mentioned or possibly mentioned in this specification are defined relative to the structure shown in the accompanying drawings. The terms "inner" and "outer" refer to the direction toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their different positions and usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0031] As attached Figure 1-7 As shown in the embodiment of this application, a fixed prism rod calibration device is provided. The device includes a support frame 1, a clamping rod assembly 2, a positioning bolt 3, and a fixing groove 4. The clamping rod assemblies 2 are inserted in pairs into the side end of the support frame 1 and are used to adjust and clamp the side wall of the prism rod a. The positioning bolt 3 is screwed onto the upper end of the support frame 1, with its lower end extending out to support the clamping rod assembly 2. The tapered fixing groove 4 is located at the lower end of the support frame 1, on the central axis of the support frame 1, and is used to place the prism rod a.

[0032] In this embodiment, the support frame 1 is mainly a frame structure composed of multiple ridges. The clamping rod assembly 2 is horizontally inserted into the side of the support frame 1. By horizontally moving the clamping rod assembly 2, prism rods a of different sizes can be clamped. The positioning bolt 3 is screwed onto the upper end of the support frame 1, with its lower end extending out to abut against the clamping rod assembly 2, thereby limiting the clamping rod assembly 2 and preventing it from retracting under force when clamping the prism rod a. The tapered fixing groove 4 is disposed at the bottom of the support frame 1 and located on the central axis of the support frame 1, pre-positioning the prism rod a. The positioning bolt 3 is used to position the clamping rod assembly 2, ensuring the clamping force of the clamping rod assembly 2 on the prism rod a, reducing the impact of external shaking on the verticality of the prism rod a, and the tapered fixing groove 4 pre-positions the prism rod a to ensure the position and vertical accuracy of the prism rod a, reducing human error, improving positioning efficiency and calibration accuracy, and allowing a single person to complete the installation and calibration, reducing equipment dependence and operation threshold.

[0033] In use, the position of the clamping rod assembly 2 in its initial state is as shown in the attached figure. Figure 3 As shown, the prism rod a is placed inside the support frame 1, with the lower tip of the prism rod a placed in the conical fixing groove 4. The position of the clamping rod assembly 2 is adjusted so that the clamping rod assembly 2 clamps the outer wall of the prism rod a, making the prism rod a vertical. Then, the position of the clamping rod assembly 2 is fixed using the positioning bolt 3 to ensure that the prism rod a remains vertical and does not shift position.

[0034] The support frame 1 includes an upper mounting plate 11 and a lower mounting plate 12, a through hole 13 disposed on the upper mounting plate 11 for accommodating the prism rod a, and four vertical support rods 14 disposed at the four corners of the upper mounting plate 11 for connecting the lower mounting plate 12.

[0035] In this embodiment, the support frame 1 includes an upper mounting plate 11, a lower mounting plate 12, a through hole 13, and a vertical support rod 14. The upper mounting plate 11 is a hollowed-out U-shaped plate with the through hole 13 in the middle. The centers of the upper mounting plate 11 and the lower mounting plate 12 are located on the same axis. A tapered fixing groove 4 is provided on the center of the lower mounting plate 12 for placing the tip of the prism rod a. The upper and lower ends of the vertical support rod 14 are welded and fixed to the upper mounting plate 11 and the lower mounting plate 12 to ensure the structural integrity and stability of the support frame 1. The support frame 1 is a frame structure to facilitate the placement of the prism rod a. Preferably, the upper mounting plate 11 and the lower mounting plate 12 are rectangular plates, and the vertical support rod 14 is located near the four corners of the upper mounting plate 11 to ensure its supporting strength.

[0036] The support frame 1 also includes a insertion hole 15 through the side end of the upper mounting plate 11 for inserting the clamping rod assembly 2, allowing the clamping rod assembly 2 to move horizontally within the insertion hole 15 to accommodate prism rods a of different sizes. A first threaded hole 16 is located on the upper end of the upper mounting plate 11, communicating with the insertion hole 15, and used for screwing the positioning bolt 3. The positioning bolt 3 is screwed into the first threaded hole 16 and extends into the insertion hole 15 to support the clamping rod assembly 2.

[0037] The support frame 1 further includes an extension support plate 17 disposed on the side end of the upper mounting plate 11 and used for inserting and supporting the clamping rod assembly 2. The extension support plate 17 can reinforce and support the clamping rod assembly 2. The second threaded hole 18 disposed on the extension support plate 17 and used for screwing the positioning bolt 3 is provided. The positioning bolt 3 can be screwed into one of the first threaded hole 16 or the second threaded hole 18 as required. Alternatively, in addition to screwing into the threaded hole 16, the positioning bolt 3 can be added to connect with the second threaded hole 18 to provide secondary support for the clamping rod assembly 2 and improve the limiting strength.

[0038] The clamping rod assembly 2 includes a plug rod 21 and an arc-shaped plate 22 disposed at the end of the plug rod 21 and used to fit against the outer wall of the prism rod a.

[0039] In this embodiment, the insertion rod 21 is an aluminum alloy round tube, which is inserted into the insertion hole 15. An arc-shaped plate 22, which fits against the outer wall of the prism rod a, is fixedly provided at the end of the insertion rod 21 near the through hole 13. The fixed installation of the insertion rod 21 and the arc-shaped plate 22 prevents external shaking from causing the prism rod a to wobble and affecting its vertical accuracy. The four insertion rods 21 clamp the prism rod a, allowing it to hang naturally, ensuring that the tip of the prism rod a enters the conical fixing groove 4.

[0040] The clamping rod assembly 2 also includes a scale strip 23 disposed on the upper surface of the insertion rod 21.

[0041] In this embodiment, the upper surface of the insertion rod 21 is provided with the scale bar 23, and the extension length of the four insertion rods 21 is uniform to ensure that the prism rod a is located in the center position, reduce visual error, and improve the work efficiency and calibration accuracy of manual calibration.

[0042] The device also includes a positioning steel bar 5 disposed on the lower surface of the lower mounting plate 12 and used for inserting into the concrete fixing pier b.

[0043] In this embodiment, the concrete fixing block b is made of C30 concrete, and the lower mounting plate 12 is provided with the positioning steel bar 5 on its lower surface for complete fixation with the concrete fixing block b, so that the support frame 1 will not fail to meet the calibration accuracy requirements due to shaking during the adjustment of the prism rod a.

[0044] The device also includes a leveling bubble device 6 disposed on the upper surface of the upper mounting plate 11.

[0045] In this embodiment, the level bubble device 6 is used to detect the levelness of the support frame 1, thereby reducing the impact of the positional deviation of the support frame 1 on the calibration accuracy of the prism rod a.

[0046] The device also includes a guide rod 7 disposed between adjacent vertical support rods 14 and whose axis coincides with the central axis of the upper mounting plate 11, and a laser rangefinder 8 disposed on the guide rod 7 and used to measure the distance between the prism rod a and the support frame 1.

[0047] In this embodiment, the guide rod 7 is positioned between adjacent vertical support rods 14 and at the axis position closest to the outer wall of the prism rod a, so that the laser ranging device 8 can accurately measure the distance between the prism rod a and the support frame 1, and perform secondary calibration of the vertical position of the prism rod a.

[0048] One guide rod 7 is provided, and at least two laser ranging devices 8 are provided on the guide rod 7.

[0049] In this embodiment, one guide rod 7 is provided, and two laser rangefinders 8 at different heights are provided on the guide rod 7. The laser rangefinders 8 are conventional devices in the art. The two laser rangefinders 8 measure the distances from both ends of the prism rod a to the support frame 1. By measuring these two distances, the verticality deviation of the prism rod a can be quickly determined, with a calibration accuracy of 0.5mm, reducing human error and facilitating the calibration of the prism rod a. Preferably, the two laser rangefinders 8 are positioned close to the upper and lower ends of the guide rod 7, respectively.

[0050] There are two guide rods 7, which are not opposite to each other, and the laser ranging device 8 is respectively installed on the two guide rods 7 and located at the same horizontal height.

[0051] In this embodiment, two guide rods 7 are provided, and the two guide rods 7 are not arranged opposite each other, but are located on adjacent sides of the upper mounting plate 11. The laser rangefinders 8 are respectively located on the guide rods 7, and are at the same horizontal height as the two laser rangefinders 8. The verticality deviation of the prism rod a is determined by judging the difference in their distance measurements. Since the measurement deviation is more obvious closer to the lower tip of the prism rod a, the laser rangefinders 8 are positioned closer to the lower middle part of the guide rods 7.

[0052] The device further includes an adjustment and mounting assembly 9 slidably disposed on the guide rod 7 and used for mounting the laser rangefinder 8, the laser rangefinder 8 being located on the central axis of the upper mounting plate 11; the adjustment and mounting assembly 9 includes a sleeve 91 sleeved on the guide rod 7 and used for mounting the laser rangefinder 8, a fixing screw hole 92 disposed on the side end of the sleeve 91, and a fixing bolt 93 disposed on the fixing screw hole 92 and used for fixing the sleeve 91.

[0053] In this embodiment, the adjusting mounting assembly 9 is slidably mounted on the guide rod 7 for mounting the laser rangefinder 8. By adjusting the position of the adjusting mounting assembly 9, one laser rangefinder 8 can measure the distance from the prism rod a at different heights to the support frame 1, allowing for multiple calibrations. The laser rangefinder 8 is located on the central axis of the upper mounting plate 11, ensuring the accuracy of its measurements. The adjusting mounting assembly 9 includes a sleeve 91, a fixing screw hole 92, and a fixing bolt 93. The sleeve 91 is fitted onto the guide rod 7, and the laser rangefinder 8 is positioned on the side of the sleeve 91 closest to the conical fixing groove 4. The position of the sleeve 91 is then fixed by tightening the fixing bolt 93.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of this application.

Claims

1. A fixed prism rod calibration device, characterized in that, include: The support frame (1) includes a pair of clamping rod assemblies (2) inserted into the side of the support frame (1) and used for adjustment to clamp the side wall of the prism rod (a), a positioning bolt (3) screwed onto the upper end of the support frame (1) and extending out at the lower end to support the clamping rod assembly (2), and a tapered fixing groove (4) located at the lower end of the support frame (1) and on the central axis of the support frame (1) for placing the prism rod (a).

2. The fixed prism rod calibration device according to claim 1, characterized in that, The support frame (1) includes an upper mounting plate (11) and a lower mounting plate (12), a through hole (13) disposed on the upper mounting plate (11) for accommodating the prism rod (a), and four vertical support rods (14) disposed at the four corners of the upper mounting plate (11) for connecting the lower mounting plate (12).

3. The fixed prism rod calibration device according to claim 2, characterized in that, The clamping rod assembly (2) includes a plug (21) and an arc plate (22) disposed at the end of the plug (21) and used to fit against the outer wall of the prism rod (a).

4. The fixed prism rod calibration device according to claim 3, characterized in that, The clamping rod assembly (2) also includes a scale bar (23) disposed on the upper surface of the insert rod (21).

5. A fixed prism rod calibration device according to claim 2, characterized in that, The support frame (1) also includes positioning steel bars (5) disposed on the lower surface of the lower mounting plate (12) and used for inserting into the concrete fixing pier (b).

6. A fixed prism rod calibration device according to claim 2, characterized in that, It also includes a leveling bubble device (6) disposed on the upper surface of the upper mounting plate (11).

7. A fixed prism rod calibration device according to claim 6, characterized in that, It also includes a guide rod (7) disposed between adjacent vertical support rods (14) and whose axis coincides with the central axis of the upper mounting plate (11), and a laser rangefinder (8) disposed on the guide rod (7) and used to measure the distance between the prism rod (a) and the support frame (1).

8. A fixed prism rod calibration device according to claim 7, characterized in that, One guide rod (7) is provided, and at least two laser ranging devices (8) are provided on the guide rod (7).

9. A fixed prism rod calibration device according to claim 7, characterized in that, There are two guide rods (7) that are not opposite each other, and the laser ranging device (8) is respectively set on the two guide rods (7) and located at the same horizontal height.

10. A fixed prism rod calibration device according to any one of claims 7-9, characterized in that, It also includes an adjustment mounting assembly (9) that is slidably disposed on the guide rod (7) and used to install the laser rangefinder (8), the laser rangefinder (8) being located on the central axis of the upper mounting plate (11); the adjustment mounting assembly (9) includes a sleeve (91) sleeved on the guide rod (7) and used to install the laser rangefinder (8), a fixing screw hole (92) disposed on the side end of the sleeve (91), and a fixing bolt (93) disposed on the fixing screw hole (92) and used to fix the sleeve (91).

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