A device and method for correcting bubbles in a centering rod of a measuring prism

Abstract

The present invention relates to a device and method for correcting bubbles in a centering rod of a measuring prism. The device is arranged on a flat wall surface. The upper component and the lower component are installed on the same vertical surface with vertical displacement according to the height of the centering rod. A level ruler is used to assist in making the upper component and the lower component horizontal and vertically perpendicular. After installation, the upper component is connected to a connector for hanging a rope through a bearing hoist ring. The connector is connected to the centering rod and cooperates with a take-up ring to adjust the upper and lower positions of the centering rod. The rope is locked through a locking head under the bearing hoist ring to put the centering rod in a suspended state. The centering rod is clamped with an arc clamp, and the bearing hoist ring is adjusted and fixed according to the center position of the arc clamp. The counterweight device is fixed to the tip of the centering rod before checking the bubble, and is used to play a counterweight role when the centering rod is suspended to prevent the center of gravity of the bottom of the rod from shifting. The checking plate is placed on the ground at the bottom vertical position, and the accuracy of the bubble on the calibrated centering rod is further confirmed by the checking points set on the checking plate.

Description

Technical Field

[0001] The present invention relates to a calibration device for engineering surveying, mapping and construction monitoring instruments, and in particular to a quick and convenient bubble calibration device for a prism centering rod of a total station. Background Art

[0002] In the fields of engineering surveying, mapping, and monitoring, the prism centering rod is an indispensable device for operations. It is mainly used to complete all distance, angle, elevation, and other measurements during the operation of the total station. The function of the centering rod is to extend and retract and install the prism. The function of the prism is to reflect the signal and feed the information back to the instrument. The verticality of the centering rod used to install the prism directly affects the measurement accuracy and mapping quality. The circular bubble installed on the centering rod itself is the basis for ensuring verticality. Due to frequent use of the centering rod, the circular bubble often loosens and shifts, causing the lower measuring point and the center of the prism to be not on the same vertical line, which directly affects the measurement accuracy. Therefore, the level bubble must be checked and corrected in a timely manner.

[0003] The traditional verticality check method is cumbersome and requires the collaboration of two or more people. It requires setting up two total stations or theodolites at a 90° angle to the prism pole, with the prism approximately 30 meters from both instruments. The vertical wire of the telescope is aligned with the tip of the prism pole, and the horizontal mounting plate of the instrument is locked. The vertical wire of the telescope is slowly moved upward to the center of the prism. The two instruments observe simultaneously at a 90-degree angle. If the vertical wire aligns with the prism center, the verticality is acceptable. If not, readjustment is required. The vertical wire of the telescope is observed in real time until the tip of the pole and the prism center are aligned. The three screws at the bottom of the level bubble on the leveling rod are adjusted until the bubble is centered. Because the leveling rod cannot be properly fixed during adjustment, the rod can easily deviate during adjustment, requiring repeated checks of the verticality and adjustment bubble. Furthermore, this method requires the collaboration of two people and instruments, making the operation time-consuming, cumbersome, and inefficient. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for correcting the bubble of a centering rod of a measuring prism, which can be adjusted simply, quickly and accurately, and solve the repetitive operation of deviation caused by the inability to fix the centering rod during the adjustment process. The correction work can be achieved without the help of a total station and a theodolite, and can be completed ultra-fast by a single person.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A bubble correction device for a centering rod of a measuring prism is arranged on a flat wall surface and comprises an upper member, a lower member, a counterweight device and a check plate. The upper member and the lower member are installed on the same vertical plane with an upper and lower displacement according to the height of the centering rod, and a level ruler is used to assist in making the upper member and the lower member horizontal and vertically perpendicular. After the installation is completed, the upper member is connected to the connector for hanging the rope through a bearing lifting ring. The connector is used to connect the centering rod and cooperate with the wire take-up ring to adjust the upper and lower positions of the centering rod. The rope is then locked by the locking head under the bearing lifting ring to put the centering rod in a suspended state. The lower member is used to adjust the upper and lower positions of the centering rod by a wire take-up ring. The arc clamp in the centering rod is clamped, and the bearing lifting ring is adjusted and fixed according to the center position of the arc clamp; the counterweight device is fixed to the tip of the centering rod before the calibration bubble, which is used to play a counterweight role when the centering rod is suspended to prevent the center of gravity at the bottom of the rod from shifting. A circular bubble is provided in the correction seat on the centering rod, and three correction screws and a correction needle are provided below the circular bubble. The correction needle is used to adjust the three correction screws below the bubble to make the bubble enter the circle; the calibration plate is placed on the ground at the bottom vertical position, and the calibration points set on the calibration plate are used to further confirm the accuracy of the bubble on the calibrated centering rod.

[0007] Furthermore, the upper component is composed of a rectangular fixed plate, a cross bar, a bearing ring, a fixing ring, a take-up ring, a locking head, a lifting rope, and a connecting head. The rectangular fixed plate is fixed to the wall with expansion screws, and the rectangular fixed plate is welded to the cross bar at a 90° angle. The cross bar is used to hang objects and is connected in series with the bearing ring, the fixing ring, and the take-up ring. A trapezoidal groove is provided on the outside of the connecting head for connecting to the centering rod, and an internal thread is provided on the inside. A hole is provided at the center of the connecting head to connect the lifting rope, and the other end of the lifting rope is connected to the locking head under the bearing ring. The bearing ring can ensure that the suspended object is always in the direction of the gravity line when it is freely hanging, and moves back and forth in the position of the cross bar.

[0008] Furthermore, the lower component is composed of a fixed plate and two square tubes welded together. The square tube is a hollow square tube. One end of the square tube is used for fixing the plate connection, and the other end is welded with a flange nut. The nut is used to screw in a plum screw. A rectangular hole is cut in the middle of the square tube. A solid square aluminum tube is placed in the rectangular hole. An arc-shaped clamp is provided at one end of the solid square aluminum tube. The convex end of the arc-shaped clamp is connected to the solid square aluminum tube, and the concave end of the arc-shaped clamp is used to clamp the centering rod.

[0009] Furthermore, the counterweight device is composed of a carbon steel fixing ring, an internal hexagon screw, a V-shaped steel sheet, and a counterweight plumb line. The carbon steel fixing ring is composed of two half rings, and the V-shaped steel sheet is connected to the bottom of the two half rings. The opening and closing of the two half rings are adjusted by the lower V-shaped steel sheet so that they can embrace the centering rods of different diameters, and then the embrace is strengthened by two internal hexagon screws. A hole is set in the center of the V-shaped steel sheet for hanging the counterweight plumb line. The counterweight plumb line and the rod tip are in the same plumb plane. The counterweight plumb line is further confirmed according to the calibration plate set below to confirm the accuracy of the calibrated centering rod bubble.

[0010] Furthermore, the calibration plate is composed of an iron plate, an anti-slip pad, and a calibration point. The calibration point is set on the calibration plate. The weight of the iron plate body and the anti-slip pad at the bottom prevent the calibration plate from shifting during the process. The calibration plate is placed after the first installation is completed. The plumb line is hung through the locking head under the upper bearing lifting ring, and the calibration plate is moved until the calibration point and the plumb line are on the same plumb line, and then fixed.

[0011] A method for correcting bubbles in a centering rod of a measuring prism, using a bubble correction device for a centering rod of a measuring prism, specifically comprising the following steps:

[0012] (1) Install the counterweight device at the tip of the centering rod, and connect the top of the centering rod to the connector. The other end of the connector is connected to the bearing eye through a lifting rope. Adjust the height of the centering rod according to the take-up ring so that the rod tip is slightly higher than the check point, and secure the lifting rope with a locking head.

[0013] (2) Observe the circular bubble on the centering rod. If the bubble is in the center of the circle and the centering rod is vertical, no correction is required. If the bubble is outside the circle, adjustment is required.

[0014] (3) After being suspended, the centering rod is now at the center of the two arc-shaped clamps of the lower component. At this time, the centering rod is in an absolutely vertical state. Slowly push the two solid aluminum tubes to make the arc-shaped clamps completely fit the centering rod. Then, screw in the plum screw through the flange nut fixed to one end of the hollow square tube until the top end of the plum screw is against the solid aluminum tube. After tightening the plum screw, the centering rod is completely fixed.

[0015] (4) After the centering rod is completely fixed, use the correction needle to adjust the correction screw below the bubble so that the bubble enters the circle;

[0016] (5) After the bubble adjustment is completed, observe whether the bottom counterweight line is on the same vertical plane as the calibration point. If they are on the same vertical plane, it means that the calibration is correct. Remove the counterweight device and the bubble calibration is completed.

[0017] Compared with the prior art, the present invention has the following advantages and effective results:

[0018] The centering rod correction device of the present invention eliminates the need for dual instrument operation and can be completed by one person. It is ultra-fast and simple. In addition, the centering rod is fixed during the correction process and will not move during the bubble adjustment process. After the adjustment is completed, the accuracy of the correction can be checked again. The adjustment is completed in one go and the accuracy can be guaranteed, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the upper component structure of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the lower component of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the counterweight device component and the check plate component of the present invention;

[0022] Figure 4 This is a schematic diagram of the check plate placement and bearing ring positioning and fixing structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the overall assembly structure of the upper and lower components, the counterweight and the centering rod of the present invention;

[0024] Figure 6 It is a cross-sectional view of the connector structure;

[0025] Figure 7 It is a top view of the bubble and correction device;

[0026] Figure 8 It is a front view of the bubble and the correction device;

[0027] Figure 9 It is a side view of the bubble correction device for the centering rod of the measuring prism of the present invention;

[0028] In the figure: 1. Upper member fixing plate, 2. M6 expansion screw A, 3. Wire take-up ring, 4. Bearing lifting eye, 5. Fixing ring, 6. Crossbar, 7. Locking head, 8. Lifting rope, 9. Connector, 10. Lower member fixing plate, 11. M6 expansion screw B, 12. Hollow square tube, 13. Solid aluminum tube, 14. Arc clamp, 15. Flange nut, 16. Torx screw, 17. Bubble screw, 18. Correction screw, 19. Centering rod, 20. Carbon steel fixing ring, 21. Hexagon screw, 22. V-shaped steel sheet, 23. Rod tip, 24. Counterweight plumb line, 25. Calibration point, 26. Calibration plate, 27. Anti-slip pad, 28. Calibration pin. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 9 As shown, the present invention provides a convenient and efficient measurement prism centering rod bubble correction device, the device is fixed on a flat wall, the device is divided into an upper component ( Figure 1 ), lower components ( Figure 2 ), and counterweight device and check plate ( Figure 3), the upper and lower components are required to be installed in the same vertical plane with the height of the centering rod staggered up and down. The upper and lower components are connected and fixed to the wall with M6 expansion screws A2 and M6 expansion screws B11 respectively. When fixing, first draw a vertical line on the wall, align the cross sections of the upper and lower components with the vertical line, and use a level ruler to assist in the horizontal level of the installation components. After installation, the locking head 7 under the bearing eye 4 cooperates with the take-up ring 3 to hang the line vertical 24 ( Figure 4 ), place the ground check plate 26 until the check point 25 on the check plate 26 and the plumb line 24 are aligned in the same vertical plane, and then secure them. Further accurately adjust the center of the bearing eye 4 relative to the center of the arc-shaped clamp 14 using the plumb line 24. Secure the bearing eye 4 with the retaining ring 5 provided on it. Once installation and securement are complete, remove the plumb line 24, and use it as a check platform for bubble calibration and verification of the centering rod.

[0031] like Figure 1 As shown, the upper structure consists of an upper structure fixing plate 1, a crossbar 6, a bearing eye 4, a fixing ring 5, a take-up ring 3, a locking head 7, a sling 8, and a connector 9. The fixing plate has two screw holes and is secured to the wall using M6 expansion screws A2. The upper structure fixing plate 1 is welded to a 9mm crossbar 6 at a 90-degree angle. The crossbar 6 primarily serves to suspend objects and is connected in series with the bearing eye 4, the fixing ring 5, and the take-up ring 3. The bearing eye 4 connects to the connector 9 for the sling suspending rope. This connector 9 is used to connect to the centering rod and coordinates with the take-up mechanism to adjust the rod's vertical position. The locking head 7 below the bearing eye 4 locks the sling 8, keeping the rod suspended. The connector 9 has a trapezoidal groove on the outside for connecting to the centering rod 19 and a 15.87mm internal thread for attaching to RTK and other rod models. A hole is located in the center of the connector 9 for connecting the sling 8. The other end of the lifting rope 8 is connected to the locking head 7 under the bearing lifting ring 4. The bearing lifting ring 4 can ensure that the suspended object is always in the direction of the gravity line when it is freely hanging. It can also move forward and backward on the position of the crossbar 6 to further adjust the upper and lower components to be on the same vertical plane, thereby ensuring that the front and rear positions of the suspended object are in the center of the arc clamp and fixed to it by the fixing ring 5. The upper component fixing plate 1 is a rectangular fixing plate with a thickness of about 2mm.

[0032] like Figure 2As shown, the lower member is welded by a lower member fixing plate 10 and two square tubes. The square tube is a 20*20mm hollow square tube 12. One end of the hollow square tube 12 is used to connect to the lower member fixing plate 10, and the other end is welded to a flange nut 15. The flange nut 15 is used to screw into a plum screw 16. A rectangular hole is cut in the middle of the hollow square tube 12. The cut size is a rectangular hole of the same size as the solid aluminum tube 13. A solid aluminum tube 13 is placed in the rectangular hole. One end of the solid aluminum tube 13 is cut from a φ30mm round tube into two arc-shaped clamps 14. The convex end of the arc-shaped clamp 14 is connected to the solid aluminum tube 13, and the concave end of the arc-shaped clamp 14 is used to clamp the centering rod 19.

[0033] like Figure 3 As shown, the counterweight device is a counterweight suspension device fixed to the tip of the centering rod 19 before the bubble is checked. It is composed of a carbon steel fixing ring 20, a hexagonal screw 21, a V-shaped steel sheet 22, and a counterweight plumb line 24. The carbon steel fixing ring 20 is composed of two half rings, and the V-shaped steel sheet 22 is connected below the two half rings. The opening and closing of the two half rings are adjusted by the lower V-shaped steel sheet 22 to make them fit the centering rod 19 of different diameters, and then the fit is strengthened by two hexagonal screws 21. A hole is set in the center of the steel sheet for hanging the counterweight plumb line 24. The counterweight plumb line 24 and the rod tip 23 are in the same plumb plane. The counterweight plumb line 24 mainly acts as a counterweight when the centering rod 19 is suspended to prevent the center of gravity at the bottom of the rod from shifting. The counterweight plumb line 24 can also further confirm the accuracy of the bubble of the calibrated centering rod 19 according to the verification plate 26 set below.

[0034] The check plate 26 is composed of an iron plate, anti-slip pads 27, and check points 25. Check plate 26 is primarily used to set check points 25. The weight of the iron plate, combined with the anti-slip pads 27 below, prevents the check plate 26 from shifting during installation. Check plate 26 is installed after initial installation. The counterweight plumb line 24 is suspended from the locking head 7 below the upper bearing eye 4. The check plate 26 is moved until the check points 25 and the counterweight plumb line 24 are aligned and then secured.

[0035] The centering rod 19 is connected to the correction seat, in which a circular bubble 17 is provided. Three correction screws 18 and a correction needle 2 are provided below the circular bubble 17. The correction needle 28 is used to adjust the three correction screws 18 below the bubble so that the bubble 17 enters the circle.

[0036] A convenient and efficient method for calibrating the bubble of a prism centering rod is disclosed. First, a counterweight device is installed at the tip 23 of the centering rod, with the bottom center of the V-shaped steel sheet 22 slightly lower than the tip 23. The carbon steel fixing ring 20 is adjusted to open and close through the V-shaped steel sheet 22 of the counterweight device so that it surrounds the centering rod. The fixation is then strengthened by two hexagon socket screws 21. The counterweight line 24 is suspended through the center hole at the bottom center of the V-shaped steel sheet. The connector 9 is connected to the centering rod using a suspension method, and the vertical position of the centering rod is adjusted through the take-up ring 3 so that the centering rod 24 is suspended by the center of the counterweight line 24, slightly higher than the calibration point 25. The take-up ring 3 and the locking head 7 are used to fix the suspension rope 8. At this time, the centering rod 19 is in a suspended state. Under the action of gravity, the centering rod 19 is in an absolutely vertical state. The circular bubble 17 on the centering rod is observed. If the circular bubble is in the center of the circle, the bubble does not need to be corrected. If the bubble runs out of the circle, correction is required.

[0037] Before adjustment, stabilize the centering rod 19. Without shaking, slowly push the two solid aluminum tubes 13 so that the arc-shaped clamps 14 on both sides completely embrace the centering rod. Then, screw in the plum screw 16 through the flange nut 15 fixed to one end of the hollow square tube 12 until the top of the plum screw rests against the solid aluminum tube 13. After tightening the plum screw, the centering rod is completely fixed. Perform bubble correction on the completely fixed centering rod and use the correction needle 28 to adjust the three correction screws 18 below the bubble so that the bubble 17 enters the circle.

[0038] After the bubble adjustment is completed, the test results are verified. Through the bottom verification plate 26, it is observed whether the counterweight line 24 and the verification point 25 are on the same plumb line. After confirmation, the counterweight device is removed and the bubble correction and verification are completed.

Claims

1. A bubble correction device for a measuring prism centering rod, mounted on a flat wall, characterized by: It includes an upper member, a lower member, a counterweight device and a check plate. The upper member and the lower member are installed on the same vertical plane with an upper and lower displacement according to the height of the centering rod, and a level ruler is used to assist in making the upper member and the lower member horizontal and vertical. After the installation is completed, the upper member is connected to the connector for hanging the lifting rope through the bearing lifting ring. The connector is used to connect the centering rod and cooperate with the wire take-up ring to adjust the upper and lower positions of the centering rod. The lifting rope is then locked through the locking head under the bearing lifting ring to put the centering rod in a suspended state. The arc clamp in the lower member is used to clamp the centering rod, and the arc clamp is adjusted according to the arc clamp. The center position of the hoop is used to adjust and fix the bearing hanging ring; the counterweight device is fixed to the tip of the centering rod before the bubble is checked, and is used to play a counterweight role when the centering rod is suspended to prevent the center of gravity at the bottom of the rod from shifting. A circular bubble is provided in the correction seat on the centering rod, and three correction screws and a correction needle are provided below the circular bubble. The correction needle is used to adjust the three correction screws below the bubble to make the bubble enter the circle; the correction plate is placed on the ground at the bottom vertical position, and the correction points set on the correction plate are used to further confirm the accuracy of the bubble on the calibrated centering rod; the upper component is composed of a rectangular The rectangular fixing plate is fixed to the wall with expansion screws, and the rectangular fixing plate is welded to the crossbar at 90 degrees. The crossbar is used to hang objects and is connected in series with the bearing ring, fixing ring, and take-up ring. A trapezoidal groove is provided on the outside of the connector for connecting the centering rod, and an internal thread is provided on the inside. A hole is provided in the center of the connector to connect the rope. The other end of the rope is connected to the locking head under the bearing ring. The bearing ring can ensure that the suspended object is always in the direction of the gravity line when it is freely hanging. and move forward and backward in the position of the cross bar; the counterweight device is composed of a carbon steel fixing ring, an hexagon socket screw, a V-shaped steel sheet, and a counterweight plumb line. The carbon steel fixing ring is composed of two half rings, and the two half rings are connected to the V-shaped steel sheet at the bottom. The opening and closing of the two half rings are adjusted by the lower V-shaped steel sheet to make them embrace the centering rods of different diameters, and then the embrace is strengthened by two hexagon socket screws. A hole is set in the center of the V-shaped steel sheet for hanging the counterweight plumb line. The counterweight plumb line and the rod tip are in the same plumb plane. The counterweight plumb line is further confirmed according to the calibration plate set below to confirm the accuracy of the calibrated centering rod bubble.

2. The bubble correction device for the centering rod of a measuring prism according to claim 1, characterized in that: The lower component is composed of a fixed plate and two square tubes welded together. The square tube is a hollow square tube. One end of the square tube is used for connecting to the fixed plate, and the other end is welded with a flange nut. The nut is used to screw in a plum screw. A rectangular hole is cut in the middle of the square tube. A solid square aluminum tube is placed in the rectangular hole. An arc-shaped clamp is provided at one end of the solid square aluminum tube. The convex end of the arc-shaped clamp is connected to the solid square aluminum tube, and the concave end of the arc-shaped clamp is used to clamp the centering rod.

3. The bubble correction device for the centering rod of a measuring prism according to claim 1, characterized in that: The check plate is composed of an iron plate, an anti-slip pad, and a check point. The check point is set on the check plate. The weight of the iron plate body and the anti-slip pad at the bottom prevent the check plate from shifting during the process. The check plate is placed after the first installation is completed. The plumb line is hung through the locking head under the upper bearing lifting ring, and the check plate is moved until the check point and the plumb line are on the same plumb line and are fixed.

4. A method for correcting bubbles in a centering rod of a measuring prism, using the bubble correction device for a centering rod of a measuring prism according to any one of claims 1 to 3, characterized in that: The specific steps are: (1) Install the counterweight device at the tip of the centering rod, and connect the top of the centering rod to the connector. The other end of the connector is connected to the bearing eye through a lifting rope. Adjust the height of the centering rod according to the take-up ring so that the tip of the rod is slightly higher than the check point, and fix the lifting rope with a locking head. (2) Observe the circular bubble on the centering rod. If the circular bubble is in the center of the circle and the centering rod is vertical, no correction is required. If the circular bubble moves out of the circle, adjustment is required. (3) After being suspended, the centering rod is now at the center of the two arc-shaped clamps of the lower component. At this time, the centering rod is in an absolutely vertical state. Slowly push the two solid aluminum tubes to make the arc-shaped clamps completely fit the centering rod. Then screw in the plum screw through the flange nut fixed to one end of the hollow square tube until the top of the plum screw is against the solid aluminum tube. After the plum screw is tightened, the centering rod is completely fixed. (4) After the centering rod is completely fixed, use the correction needle to adjust the correction screw below the bubble so that the bubble enters the circle; (5) After the bubble adjustment is completed, observe whether the bottom counterweight line is on the same vertical plane as the calibration point. If they are on the same vertical plane, it means that the calibration is correct. Remove the counterweight device and the bubble calibration is completed.

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