Auxiliary device for period error calibration of total station based on dual-frequency laser interferometer

Abstract

The present application relates to total station calibration technical field, specifically to the total station period error calibration auxiliary device based on dual-frequency laser interferometer, including control cabinet, the right side of control cabinet is installed with detection platform, the front and back sides of detection platform top are all installed with guide rail, the top of guide rail is connected with gantry, the top of gantry is provided with auxiliary assembly, auxiliary assembly contains installation base, the left side of gantry is fixedly connected with placing plate.The present application through the structure such as operation plate, fixed box, protection box in auxiliary assembly, after testing, the reflecting prism does not need to be disassembled, can be stored in fixed box through auxiliary assembly, and protection is realized by protection box and mounting plate bolt connection, effectively avoids mirror surface pollution, knock or optical performance degradation, when next test starts, only needs to reverse operation to quickly restore the reflecting prism to original working position, thereby rapidly realizes optical axis alignment with total station body.

Description

Technical Field

[0001] This invention relates to the field of total station calibration technology, and more specifically to an auxiliary device for calibrating the periodic error of a total station based on a dual-frequency laser interferometer. Background Technology

[0002] Total station distance measurement methods mainly include phase method, pulse method, and frequency conversion method, among others. The phase method is the most accurate and widely used. Regardless of how much the instrument's accuracy improves, the technique of adding a modulation signal to the emitted light remains unchanged. Like other light waves, the modulated light wave is subject to interference from other (internal and external) electromagnetic waves during propagation. Without considering external influences, the internal interference experienced by the modulated light wave of the same instrument over a certain period is periodic. Periodic error refers to the error that repeats with the instrument's precision measuring scale length as the period. The amplitude of the periodic error should not exceed 3 / 5 of the fixed error of the instrument's nominal standard deviation. To eliminate this error, the instrument's periodic error must be accurately measured for correction in the distance observation values.

[0003] In the existing high-precision testing process for calibrating the periodic error of a total station using a dual-frequency laser interferometer, the reflecting prism requires repeated installation and removal: before each test, it must be precisely installed on the device under test and strictly aligned with the total station; after the test, it must be manually removed and placed in a special storage box to prevent contamination or mechanical damage. When the next test begins, it must be removed again, cleaned as needed, and reinstalled and aligned. This cyclical operation is not only cumbersome and time-consuming, severely limiting testing efficiency, but more importantly, it inevitably introduces small but not negligible positional offsets, angular deviations, or repeatability errors during repeated installation and removal. These installation and removal errors directly add to the periodic error measurement results, reducing data repeatability and consistency, and thus affecting the accurate assessment of the total station's true periodic error. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides an auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer. This device effectively solves the problem in existing technologies where, in the high-precision testing of the periodic error of a total station using a dual-frequency laser interferometer, the reflecting prism needs to be repeatedly installed, disassembled, cleaned, and realigned. This process is cumbersome and inefficient, and repeated operations can easily introduce repetitive positioning errors such as positional offsets and angular deviations, directly affecting the repeatability, consistency, and accuracy of periodic error measurements.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer, comprising a control console, a testing platform mounted on the right side of the control console, guide rails mounted on both the front and rear sides of the top of the testing platform, a gantry frame connected to the top of the guide rails, an auxiliary component mounted on the top of the gantry frame, the auxiliary component including a mounting base, a placement plate fixedly connected to the left side of the gantry frame, fixing plates fixedly connected to both the front and rear sides of the top of the mounting base, a running plate rotatably connected to one side of the fixing plate, a fixing box fixedly connected to the top of the running plate, a reflecting prism disposed within the cavity of the fixing box, mounting plates fixedly connected to the surfaces of the placement plate and the gantry frame respectively, a protective box placed on the top of the control console, and a testing component mounted on the right side of the testing platform.

[0006] Furthermore, a laser interferometer is installed on the top of the testing platform, and the testing assembly includes an observation pier and a total station body.

[0007] Furthermore, the inner cavity of the fixed box is rotatably connected to two rotating rods, the outer surfaces of the two rotating rods are fixedly connected to gears, and the two gears mesh. The outer surfaces of the rotating rods are fixedly connected to push plates, and clamping plates are slidably connected to both sides of the bottom of the inner cavity of the fixed box.

[0008] Furthermore, a connecting plate is fixedly connected to the outer surface of the clamping plate, a positioning rod is fixedly connected to the surface of the connecting plate, a positioning plate is fixedly connected to the outer surface of the positioning rod, and one side of the positioning plate is rotatably connected to the push plate.

[0009] Furthermore, a worm gear is rotatably connected to the inner cavity of the fixed box, and a worm wheel is fixedly connected to the outer surface of the rotating rod, with the worm wheel meshing with the worm gear.

[0010] Furthermore, a first threaded rod is rotatably connected to the top of the placement plate, and a threaded block is threadedly connected to the outer surface of the first threaded rod. The bottom of the threaded block is slidably connected to the placement plate.

[0011] Furthermore, round rods are fixedly connected to both the front and rear sides of the threaded block, and a long plate is bolted to the rear side of the reflecting prism, with short rods rotatably connected to both sides of the long plate.

[0012] Furthermore, a guide plate is rotatably connected to the outer surface of the round rod, and the outer surface of the short rod is rotatably connected to the guide plate.

[0013] Furthermore, a base rod is fixedly connected to the top of the observation pier, a limit plate is slidably connected to the inner cavity of the base rod, and a second threaded rod is rotatably connected to the top of the limit plate.

[0014] Furthermore, the top end of the second threaded rod penetrates the outer side of the inner cavity of the base rod, and a placement block is rotatably connected to the top end of the second threaded rod. The top of the placement block is connected to the total station body, and a threaded sleeve is rotatably connected to the top of the base rod. The inner cavity of the threaded sleeve is threadedly connected to the second threaded rod.

[0015] Beneficial effects The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention, through its auxiliary components including a running plate, a fixed box, and a protective box, allows the reflecting prism to be stored in the fixed box without disassembly after testing. The protective box is then bolted to the mounting plate for protection, effectively preventing mirror contamination, impacts, or optical performance degradation. When the next test begins, the prism can be quickly restored to its original working position simply by reversing the operation, and its angle can be finely adjusted, quickly aligning with the optical axis of the total station. This design significantly reduces the time required for repeated disassembly, relocation of the storage box, and recalibration in traditional processes, greatly improving test preparation efficiency and operational convenience.

[0016] Second, this invention also utilizes auxiliary components such as clamping plates, push plates, connecting plates, and positioning rods. These auxiliary components employ a transmission structure composed of worm gears, worm wheels, rotating rods, and gears to drive the clamping plates on both sides to move synchronously towards or away from each other, thereby reliably clamping reflective prisms of different sizes and ensuring their stability and repeatability during testing. This clamping function works in conjunction with the aforementioned storage function, allowing users to quickly replace and secure various prisms, enabling immediate testing upon installation. Simultaneously, in conjunction with the height adjustment mechanism in the testing component, rotating the threaded sleeve drives the second threaded rod, limiting plate, and placement block to rise and fall, thereby adjusting the height of the total station body 67. This further optimizes the optical path alignment conditions, achieving integrated prism clamping, storage, reset, and instrument alignment, significantly improving the overall efficiency of the testing process and facilitating use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the auxiliary component of the present invention; Figure 3This is a three-dimensional sectional view of the fixed box structure of the present invention. Figure 4 This is a bottom view of the clamping plate structure of the present invention; Figure 5 This is a three-dimensional schematic diagram of the pusher plate structure of the present invention; Figure 6 This is a three-dimensional schematic diagram of the placement plate structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a three-dimensional side view of the base rod structure of the present invention.

[0019] Reference numerals: 1. Control console; 2. Testing platform; 3. Guide rail; 4. Gantry frame; 5. Auxiliary components; 51. Mounting base; 52. Placement plate; 53. Fixing plate; 54. Running plate; 55. Fixing box; 56. Reflecting prism; 57. Rotating rod; 58. Gear; 59. Push plate; 510. Clamping plate; 511. Connecting plate; 512. Positioning plate; 513. Positioning rod; 514. Worm gear; 515. Worm wheel; 516. First threaded rod; 517. Threaded block; 518. Round rod; 519. Long plate; 520. Short rod; 521. Guide plate; 522. Mounting plate; 523. Protective box; 6. Test components; 61. Observation pier; 62. Base rod; 63. Limiting plate; 64. Second threaded rod; 65. Placement block; 66. Threaded sleeve; 67. Total station body; 7. Laser interferometer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] See attached document Figure 1-8An auxiliary device for periodic error verification of a total station based on a dual-frequency laser interferometer is characterized by comprising a control console 1, which is composed of information processing equipment, such as a computer, etc. A detection platform 2 is installed on the right side of the control console 1, which is placed in contact with the ground. Guide rails 3 are installed on the front and rear sides of the top of the detection platform 2. A gantry frame 4 is connected to the top of the guide rails 3. A slide is connected to the top of the guide rails 3. The slide is connected to the gantry frame 4. The guide rails 3 are existing structures and will not be described in detail. An auxiliary component 5 is provided on the top of the gantry frame 4. The auxiliary component 5 includes a mounting base 51, which is bolted to the top of the gantry frame 4. A placement plate 52 is fixedly connected to the left side of the gantry frame 4. The placement plate 52 is aligned with the mounting base 51. Fixing plates 53 are fixedly connected to the front and rear sides of the top of the mounting base 51. A running plate 54 is rotatably connected to one side of the fixing plate 53. A fixing box 55 is fixedly connected to the top of the running plate 54.

[0023] See attached document Figure 1-7 The inner cavity of the fixed box 55 is equipped with a reflecting prism 56. The surfaces of the placement plate 52 and the gantry 4 are respectively fixedly connected with mounting plates 522. The top of the control console 1 is equipped with a protective box 523, which is used to store the reflecting prism 56 after use. The front and rear sides of the protective box 523 are connected with bolts, which are threaded to the mounting plates 522. The right side of the test table 2 is equipped with a test assembly 6, and the top of the test table 2 is equipped with a laser interferometer 7.

[0024] See attached document Figure 1-8 Test component 6 includes an observation pier 61 and a total station body 67. The total station body 67, control console 1, and reflecting prism 56 are electrically connected to facilitate user observation of the total station periodic error verification data of the dual-frequency laser interferometer. To improve the measurement accuracy of the total station body 67 under test, before verification, the total station body 67 is calibrated on the angle measurement verification device to correct for compensators, line-of-sight errors, and vertical circle index errors. The minimum distance reading is changed to 0.1 mm. 2. Frequency verification is performed using the navigation and frequency verification room. 1. Measure the frequency of the measuring scale 67 on the total station under test; 2. Turn on the dual-frequency laser interferometer calibration equipment (referring to laser interferometer 7) according to the power-on sequence for preheating; 3. Calculate the measuring scale length U (without taking a position) and step distance d (retained to 0.001m) based on the measured measuring scale frequency; 4. Create a table and fill in the basic information of the instrument under test in the record table. After the preparation work is completed, open the dual-frequency laser interferometer control software "Gager2021", i.e., open it from console 1: ① Enter the total distance to be moved U=n in the distance input window. ① Step distance, for example, if the total station being measured is a Leica TS09 / 1″, input 1500 units: mm, click "+move", and the reflecting prism 56 moves to the measurement starting point; ② Aim the crosshairs of the telescope on the total station body 57 at the center of the reflecting prism 56, perform one distance measurement, repeat the observation 5 times and record the readings; ③ Input the step distance in the distance input window, for example, if the total station body 57 being measured can be a Leica TS09 / 1″, input 75 units: mm, click "-move", and the reflecting prism 56 moves to the second measurement point, measure the distance, repeat the observation 5 times and record the readings; ④ Same as above, keep the step distance unchanged, and complete the forward measurement of 20 points from near to far; ⑤ Then, keep the step distance unchanged, click "+move", and perform the backward measurement from far to near until all points have been measured, thus completing the periodic error verification test of the total station based on the dual-frequency laser interferometer.

[0025] See attached document Figure 2-8 The inner cavity of the fixed box 55 is rotatably connected to two rotating rods 57. Gears 58 are fixedly connected to the outer surfaces of the two rotating rods 57, and the two gears 58 mesh. A push plate 59 is fixedly connected to the outer surface of the rotating rods 57. Clamping plates 510 are slidably connected to both sides of the bottom of the inner cavity of the fixed box 55. The clamping plates 510 are arc-shaped. A mounting bracket is installed on the surface of the reflecting prism 56. The bottom of the mounting bracket clamps and fixes to the clamping plates 510. A connecting plate 511 is fixedly connected to the outer surface of the clamping plate 510. A positioning rod 513 is fixedly connected to the surface of the connecting plate 511. A positioning plate 512 is fixedly connected to the outer surface of the positioning rod 513. One side of the positioning plate 512 is rotatably connected to the push plate 59. A worm gear 514 is rotatably connected to the inner cavity of the fixed box 55. One end of the worm gear 514 passes through the outer side of the inner cavity of the fixed box 55 and is fixed. A torsion block for easy user manipulation is connected. A worm gear 515 is fixedly connected to the outer surface of the rotating rod 57, and the worm gear 515 meshes with the worm 514. A first threaded rod 516 is rotatably connected to the top of the placement plate 52. The outer surface of the first threaded rod 516 is provided with an external thread section. A threaded block 517 is threadedly connected to the outer surface of the first threaded rod 516. The contact part between the threaded block 517 and the first threaded rod 516 is provided with an internal thread. The bottom of the threaded block 517 is slidably connected to the placement plate 52. Round rods 518 are fixedly connected to both the front and rear sides of the threaded block 517. A long plate 519 is bolted to the rear side of the reflecting prism 56. The user can then remove the reflecting prism 56 for maintenance or replacement through the bolts. Short rods 520 are rotatably connected to both sides of the long plate 519. A guide plate 521 is rotatably connected to the outer surface of the round rod 518.

[0026] See attached document Figure 3-8The outer surface of the short rod 520 is rotatably connected to the guide plate 521. The guide plate 521 is rotatably connected to the round rod 518 and the short rod 520 through bearings. The top of the observation pier 61 is fixedly connected to the base rod 62. The observation pier 61 is made of marble. The inner cavity of the base rod 62 is slidably connected to the limit plate 63. The top of the limit plate 63 is rotatably connected to the second threaded rod 64. The outer surface of the second threaded rod 64 is provided with an external thread section. The top of the second threaded rod 64 penetrates the outer side of the inner cavity of the base rod 62. The top of the second threaded rod 64 is rotatably connected to the placement block 65. The top of the placement block 65 is connected to the total station body 67. The top of the base rod 62 is rotatably connected to the threaded sleeve 66. The inner cavity of the threaded sleeve 66 is threadedly connected to the second threaded rod 64. The contact part between the threaded sleeve 66 and the second threaded rod 64 is provided with an internal thread for threaded connection. The outer surface of the threaded sleeve 66 is fixedly connected to a wheel that facilitates rotation by the user.

[0027] Specifically, during operation, after the user completes the test, they can manually rotate the first threaded rod 516, causing it to move the threaded block 517 to the left. The threaded block 517 then pushes the round rod 518 to move synchronously, and the round rod 518 pulls the guide plate 521 through a linkage. The guide plate 521 then pulls the long plate 519 via the short rod 520, causing the reflecting prism 56, the fixed box 55, and the running plate 54 to swing downwards as a whole, ultimately changing the reflecting prism 56 from its working state to a horizontally stored position. During this process, the user can also use the above-mentioned transmission structure to fine-tune the angle of the reflecting prism 56 to ensure that it is precisely aligned with the optical axis of the total station body 67, thereby improving testing accuracy and efficiency. Subsequently, the user connects the protective box 523 to the mounting plate 522 with bolts, so that the reflecting prism 56 is completely wrapped and fixed on the gantry 4, effectively preventing dust intrusion, impact damage, or optical surface contamination, achieving on-site protection and convenient storage.

[0028] When different sizes of reflecting prisms 56 need to be adapted, the user can manually rotate the worm gear 514. The worm gear 514 meshes with the worm wheel 515 and drives it to rotate. The worm wheel 515 drives the rotating rod 57 connected to it on the same axis to rotate. The gear 58 on the rotating rod 57 further meshes with the gear 58 on the other side, so that the two rotating rods 57 rotate synchronously in opposite directions. The two rotating rods 57 pull the corresponding positioning plate 512 to swing. The positioning plate 512 drives the positioning rod 513 and the connecting plate 511 to move synchronously, ultimately driving the clamping plates 510 on both sides to move towards or away from each other, realizing adaptive clamping and stable fixation of reflecting prisms 56 of different specifications. This clamping mechanism works in conjunction with the protective box 523 to ensure the stability of the prism during testing and to support quick replacement and safe storage.

[0029] Furthermore, to accommodate the measurement needs of different sized reflecting prisms 56, the user can manually rotate the threaded sleeve 66, causing the second threaded rod 64 to move vertically upwards. The second threaded rod 64 drives the limiting plate 63 and the placement block 62 to rise synchronously, thereby raising the total station body 67 to a suitable height to achieve the optimal alignment with the currently used reflecting prism 56. This height adjustment mechanism significantly improves compatibility with multiple prism specifications, simplifies the repeated alignment process, and further enhances the flexibility and ease of use of the entire testing device.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary device for calibrating the periodic error of a total station based on a dual-frequency laser interferometer, characterized in that, The system includes a control console (1), a testing platform (2) installed on the right side of the control console (1), guide rails (3) installed on the front and rear sides of the top of the testing platform (2), a gantry frame (4) connected to the top of the guide rails (3), an auxiliary component (5) provided on the top of the gantry frame (4), the auxiliary component (5) including a mounting base (51), a placement plate (52) fixedly connected to the left side of the gantry frame (4), a fixing plate (53) fixedly connected to the front and rear sides of the top of the mounting base (51), a running plate (54) rotatably connected to one side of the fixing plate (53), a fixing box (55) fixedly connected to the top of the running plate (54), a reflecting prism (56) provided in the inner cavity of the fixing box (55), a mounting plate (522) fixedly connected to the surfaces of the placement plate (52) and the gantry frame (4), a protective box (523) placed on the top of the control console (1), and a testing component (6) provided on the right side of the testing platform (2).

2. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 1, characterized in that, A laser interferometer (7) is installed on the top of the testing platform (2), and the testing assembly (6) includes an observation pier (61) and a total station body (67).

3. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 1, characterized in that, The inner cavity of the fixed box (55) is rotatably connected to two rotating rods (57), and gears (58) are fixedly connected to the outer surfaces of the two rotating rods (57), and the two gears (58) mesh. A push plate (59) is fixedly connected to the outer surface of the rotating rods (57), and clamping plates (510) are slidably connected to both sides of the bottom of the inner cavity of the fixed box (55).

4. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 3, characterized in that, A connecting plate (511) is fixedly connected to the outer surface of the clamping plate (510), a positioning rod (513) is fixedly connected to the surface of the connecting plate (511), a positioning plate (512) is fixedly connected to the outer surface of the positioning rod (513), and one side of the positioning plate (512) is rotatably connected to the push plate (59).

5. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 4, characterized in that, The inner cavity of the fixed box (55) is rotatably connected to a worm (514), and the outer surface of the rotating rod (57) is fixedly connected to a worm wheel (515), and the worm wheel (515) meshes with the worm (514).

6. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 1, characterized in that, The top of the placement plate (52) is rotatably connected to a first threaded rod (516), and the outer surface of the first threaded rod (516) is threadedly connected to a threaded block (517). The bottom of the threaded block (517) is slidably connected to the placement plate (52).

7. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 6, characterized in that, The threaded block (517) is fixedly connected to round rods (518) on both the front and rear sides, and the rear side of the reflecting prism (56) is bolted with a long plate (519), and short rods (520) are rotatably connected to both sides of the long plate (519).

8. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 7, characterized in that, The outer surface of the round rod (518) is rotatably connected to the guide plate (521), and the outer surface of the short rod (520) is rotatably connected to the guide plate (521).

9. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 2, characterized in that, The top of the observation pier (61) is fixedly connected to a base rod (62), and the inner cavity of the base rod (62) is slidably connected to a limiting plate (63). The top of the limiting plate (63) is rotatably connected to a second threaded rod (64).

10. The auxiliary device for verifying the periodic error of a total station based on a dual-frequency laser interferometer according to claim 9, characterized in that, The top end of the second threaded rod (64) passes through the outer side of the inner cavity of the base rod (62). The top end of the second threaded rod (64) is rotatably connected to a placement block (65). The top of the placement block (65) is connected to the total station body (67). The top of the base rod (62) is rotatably connected to a threaded sleeve (66). The inner cavity of the threaded sleeve (66) is threadedly connected to the second threaded rod (64).

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