Special track center line measurement framework for carrying inertial navigation RTK (Real-Time Kinematic)

Abstract

The utility model discloses a special framework for measuring a track center line for carrying an inertial navigation RTK (Real-Time Kinematic), which comprises an assembly frame arranged between double tracks of a track, two telescopic arms are respectively assembled on two sides of the assembly frame close to the double tracks, a limiting wheel is arranged at one end of each telescopic arm far away from the assembly frame, and the limiting wheels are connected with the assembly frame. The limiting wheel is clamped with the outer side edge of the rail top of the steel rail, a correction assembly is installed at the center of the assembling frame, and the lower end of the inertial navigation measuring instrument is detachably connected with the correction assembly. According to the utility model, the overall portability can be effectively improved, the investment cost of equipment is reduced, the accurate centering function is realized, the deviation condition is avoided, and the measurement precision is improved. The device is suitable for the technical field of track inertial navigation measurement.

Description

Technical Field

[0001] The utility model belongs to the technical field of track measurement, and specifically relates to a special frame for measuring the center line of a track carrying an inertial navigation RTK. Background Art

[0002] When using inertial navigation RTK to measure the track, two methods are generally used. The first method is to use an inertial navigation measurement total station to achieve this. The inertial navigation measurement total station is placed on the track, and then it is controlled to move on the track to achieve measurement of different positions on the track; however, this measurement method requires a large investment in equipment costs, and the volume and weight of the equipment are large, which is not convenient to carry and transport. The second method is to use manual operation to place the inertial navigation measurement instrument at a predetermined position, that is, the center line of the track, and then measure; this method is prone to deviation (misalignment) due to manual determination of the position, which in turn affects the measurement accuracy. Therefore, there is an urgent need for an inertial navigation measurement device to improve portability, reduce the investment cost of equipment, realize the function of accurate centering, avoid deviations, and improve measurement accuracy. Utility Model Content

[0003] The utility model provides a special frame for measuring the center line of a track equipped with an inertial navigation RTK, which is used to improve portability, reduce the investment cost of equipment, realize the function of accurate centering, avoid deviation, and improve the measurement accuracy.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A special frame for measuring the center line of a track equipped with an inertial navigation RTK comprises an assembly frame arranged between two rails of the track, two telescopic arms are respectively arranged on both sides of the assembly frame close to the two rails, a limiting wheel is arranged at one end of each telescopic arm away from the assembly frame, the limiting wheel is clamped with the outer edge of the rail top of the rail, a correction component is arranged at the center of the assembly frame, and the lower end of the inertial navigation measuring instrument is detachably connected to the correction component.

[0006] Furthermore, the assembly frame includes a horizontally arranged frame body, a bowl-shaped assembly cavity is constructed at the center of the frame body, and the upper end of the bowl-shaped assembly cavity extends out of the upper end of the frame body.

[0007] Furthermore, the correction assembly includes an active ball joint movably assembled in a bowl-shaped assembly cavity, a connecting sleeve is constructed at the upper end of the active ball joint, the lower end of the inertial navigation measuring instrument extends into the connecting sleeve and is detachably connected to the connecting sleeve, a first connecting hole is opened at the center of one end of the frame, the first connecting hole passes through both ends of the frame, and a second connecting hole that passes through the active ball joint is opened at the center of the active ball joint. When the first connecting hole and the second connecting hole are aligned with each other, one end of the limit rod passes through the frame and the active ball joint through the first connecting hole and the second connecting hole, and a locking nut is threadedly connected to this end of the limit rod.

[0008] Furthermore, the bowl-shaped assembly cavity includes an upper chamber and a lower chamber connected to each other, the upper chamber is formed on the frame and passes through the upper and lower ends of the frame, a lower cover body is detachably connected to the lower end of the frame, an assembly boss is constructed at the upper end of the lower cover body, and the lower chamber is formed on the upper end surface of the assembly boss.

[0009] Furthermore, the telescopic arm includes a first arm body, a second arm body and a third arm body which are movably mounted in sequence from the outside to the inside, the limiting wheel is installed at the end of the third arm body, the end of the first arm body away from the limiting wheel is connected to a connecting rod, four assembly holes are opened on the assembly frame, one end of the connecting rod passes through the corresponding assembly holes, an adjusting nut is threadedly connected to one end of the connecting rod, the adjusting nut is screwed on the corresponding end surface of the assembly frame, and a retaining edge extending radially outward is constructed at the other end of the connecting rod, and the retaining edge abuts against the corresponding end surface of the assembly frame; an adjusting component is installed between the two telescopic arms on the same side, and the adjusting component is connected to the assembly frame via an elastic member.

[0010] Furthermore, respective rotation angle scale marks are constructed on the end surface of the assembly frame and located at each assembly hole, and the rotation angle scale marks are evenly arranged along the circumference of the assembly hole.

[0011] Furthermore, the adjustment assembly includes two adjusting tubes arranged opposite to each other, and both ends of the adjusting rod respectively extend into the ends of the two adjusting tubes that are close to each other, and the ends of the two adjusting tubes that are far away from each other are respectively rotatably connected with vertical axes, and each of the vertical axes passes through the insertion hole of the third arm body along the vertical direction.

[0012] Furthermore, storage slots are respectively provided on the side walls of the assembly frame, and the adjustment components can be stored in the storage slots.

[0013] Furthermore, storage grooves are respectively constructed at both ends of the assembly frame, and the telescopic arms rotate along the connecting rods and are stored in the storage grooves.

[0014] Furthermore, the limiting wheel includes a wheel seat connected to the telescopic arm, and a wheel body is rotatably connected to the wheel seat. The axis of the wheel body extends vertically, and an annular groove is constructed on the circumferential surface of the wheel body. The axis of the annular groove coincides with the axis of the wheel body, and the outer side of the rail top is located in the annular groove at a corresponding position.

[0015] Due to the adoption of the above structure, the utility model has the following technical progress compared with the prior art: the utility model realizes the assembly frame to be set in the middle position of the track through four telescopic arms, two of the four telescopic arms are connected to one rail, and the other two telescopic arms are connected to another rail, which ensures that the inertial navigation measuring instrument on the assembly frame is located at the center line of the track, thereby ensuring the accuracy of measurement. Moreover, since the inertial navigation measuring instrument needs to be calibrated before use, the utility model can shake the inertial navigation measuring instrument on the assembly frame, and the lower end of the inertial navigation measuring instrument is connected to the calibration component, so that the inertial navigation measuring instrument swings with the calibration component as the base point, and the system of the inertial navigation measuring instrument prompts the completion of the calibration until the calibration is completed. After the external force is applied, the utility model can walk on the track through the limiting wheel to realize the measurement of different positions of the track. And when not in use, the telescopic arms can be retracted and stored, and the inertial navigation measuring instrument can be stored at the same time, which is convenient for carrying, transportation, etc. In summary, the utility model can effectively improve the overall portability, reduce the investment cost of the equipment, realize the function of accurate centering, avoid the occurrence of deviations, and improve the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of the structure of the middle A part;

[0020] Figure 3 This is a schematic diagram of the result from another angle of the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of an embodiment of the utility model in which four telescopic arms are stored at both ends of an assembly frame and an inertial navigation measuring instrument is placed on the assembly frame;

[0022] Figure 5 This is a structural cross-sectional view of the connection between the assembly frame and the correction component of the embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the assembly frame and the correction component after being disassembled according to the embodiment of the utility model;

[0024] Figure 7 for Figure 6 A schematic diagram of another angle of the structure shown;

[0025] Figure 8 This is a schematic diagram of the structure of the assembly frame and the correction component of the embodiment of the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the connection between the telescopic arm and the limiting wheel in the embodiment of the utility model;

[0027] Fig.10 This is a schematic structural diagram of the connection between the adjustment component and the elastic member in an embodiment of the utility model.

[0028] Labeled parts: 100-assembly frame, 101-frame, 102-angle scale mark, 103-upper chamber, 104-lower cover, 105-assembly boss, 106-lower chamber, 107-movable ball joint, 108-connecting sleeve, 109-second connecting hole, 110-first connecting hole, 111-limiting rod, 112-locking nut, 113-assembly hole, 114-storage slot, 200-inertial navigation measuring instrument, 300-telescopic Arm, 301-connecting rod, 302-adjusting nut, 303-first arm body, 304-second arm body, 305-third arm body, 306-insertion hole, 307-reference mark, 308-stop edge, 400-adjusting assembly, 401-adjusting rod, 402-adjusting tube, 403-vertical axis, 404-connecting ring, 500-limiting wheel, 501-wheel seat, 502-wheel body, 503-annular groove, 600-connecting spring. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] The utility model discloses a special frame for measuring the track centerline with an inertial navigation RTK. Figure 1-10As shown, it includes an assembly frame 100, a correction component, an inertial navigation measuring instrument 200 and four telescopic arms 300. Among them, the assembly frame 100 is arranged at a position between the double rails of the track, and the four telescopic arms 300 are evenly divided into two groups. The two telescopic arm groups are respectively assembled on both sides of the assembly frame 100 close to the double rails, and the two telescopic arms 300 of each telescopic arm group are arranged along the extension direction of the track. A limiting wheel 500 is installed at one end of each telescopic arm 300 away from the assembly frame 100, and the limiting wheel 500 is clamped with the outer edge of the rail top of the corresponding rail. The correction component of the utility model is installed at the center of the assembly frame 100, and the lower end of the inertial navigation measuring instrument 200 is detachably connected to the correction component. The working principle and advantages of the utility model are: the utility model realizes that the assembly frame 100 is set in the middle position of the track through four telescopic arms 300, two of the four telescopic arms 300 are connected to a steel rail, and the other two telescopic arms 300 are connected to another steel rail, which ensures that the inertial navigation measuring instrument 200 on the assembly frame 100 is located at the center line of the track, thereby ensuring the accuracy of measurement. Moreover, since the inertial navigation measuring instrument 200 needs to be calibrated before use, the utility model can shake the inertial navigation measuring instrument 200 on the assembly frame 100, and the lower end of the inertial navigation measuring instrument 200 is connected to the calibration component, so that the inertial navigation measuring instrument 200 swings with the calibration component as the base point, and the system of the inertial navigation measuring instrument 200 prompts the completion of the calibration until the calibration is completed. After the external force is applied, the utility model can walk on the track through the limiting wheel to achieve the measurement of different positions of the track. And when not in use, the telescopic arm 300 can be retracted and stored, and the inertial navigation measuring instrument 200 can be stored at the same time, which is convenient for carrying, transportation, etc. In summary, the utility model can effectively improve the overall portability, reduce the investment cost of the equipment, realize the function of accurate centering, avoid the occurrence of deviations, and improve the measurement accuracy.

[0031] As a preferred embodiment of the present invention, Figure 5-7As shown, the assembly frame 100 includes a horizontally arranged frame 101, and a bowl-shaped assembly cavity is constructed at the center of the frame 101, and the upper end of the bowl-shaped assembly cavity extends out of the upper end of the frame 101. The calibration component of this embodiment includes a movable ball joint 107, which is movably assembled in the bowl-shaped assembly cavity, and a connecting sleeve 108 is constructed at the upper end of the movable ball joint 107. The lower end of the inertial navigation measuring instrument 200 extends into the connecting sleeve 108 and is detachably connected thereto, generally by a threaded connection, or by a post-insertion clamping method (quick connector), etc. In this embodiment, a first connecting hole 110 is opened at the center of one end of the frame 101, and the first connecting hole 110 passes through both ends of the frame 101; a second connecting hole 109 is opened at the center of the movable ball joint 107, and the second connecting hole 109 passes through the movable ball joint 107. When the first connection hole 110 and the second connection hole 109 are aligned with each other, one end of the limit rod 111 passes through the frame 101 and the movable ball joint 107 through the first connection hole 110 and the second connection hole 109, and a locking nut 112 is threadedly connected to the end of the limit rod 111. The working principle and advantage of this embodiment are: when the inertial navigation measuring instrument 200 needs to be calibrated, the locking nut 112 is unscrewed, and then the limit rod 111 is pulled off, and then the inertial navigation measuring instrument 200 is shaken, so that the lower end of the inertial navigation measuring instrument 200 drives the movable ball joint 107 to rotate in the bowl-shaped assembly cavity, thereby ensuring the purpose of the inertial navigation measuring instrument 200 swinging, and will not interfere with the calibration operation of the inertial navigation measuring instrument 200. After the calibration is completed, the first connection hole 110 and the second connection hole 109 are aligned, the limit rod 111 is inserted, and the locking nut 112 is tightened.

[0032] As a preferred embodiment of the utility model, in order to facilitate the disassembly, assembly and maintenance of the movable ball joint 107, the measures taken are as follows: Figure 5-7 As shown, the bowl-shaped assembly cavity includes an upper chamber 103 and a lower chamber 106 which are spliced ​​with each other, wherein the upper chamber 103 is formed on the frame 101 and penetrates the upper and lower ends of the frame 101. A lower cover 104 is detachably connected to the lower end of the frame 101, and an assembly boss 105 is constructed at the upper end of the lower cover 104, and the lower chamber 106 is formed on the upper end surface of the assembly boss 105. In this embodiment, the movable ball joint 107 is disassembled by disassembling the lower cover 104.

[0033] As a preferred embodiment of the present invention, Figure 2 , 3As shown in Figures 9 and 10, the telescopic arm 300 includes a first arm body 303, a second arm body 304 and a third arm body 305 which are movably mounted from the outside to the inside in sequence, and the above-mentioned limiting wheel 500 is installed at the end of the third arm body 305. In this embodiment, a connecting rod 301 is connected to one end of the first arm body 303 away from the limiting wheel 500, four assembly holes 113 are opened on the assembly frame 100, one end of the connecting rod 301 passes through the corresponding assembly holes 113, and an adjusting nut 302 is threadedly connected to one end of the connecting rod 301, and the adjusting nut 302 is screwed on the corresponding end face of the assembly frame 100. A stop edge 308 is constructed at the other end of the connecting rod 301, and the stop edge 308 extends outward along the radial direction of the connecting rod 301, and the stop edge 308 abuts against the corresponding end face of the assembly frame 100. In this embodiment, an adjustment component 400 is installed between the two telescopic arms 300 on the same side, and the adjustment component 400 is connected to the assembly frame 100 through an elastic member. In this embodiment, the end surface of the assembly frame 100 and each assembly hole 113 are provided with respective rotation angle scale marks 102, each rotation angle scale mark 102 is evenly arranged along the circumference of the corresponding assembly hole 113, and a reference mark 307 is configured at the corresponding end of the connecting rod 301. In this embodiment, the adjustment nut 302 can be loosened so that the connecting rod 301 can drive the telescopic arm 300 to rotate, and after adjusting a certain angle (the rotation angle is determined by the reference mark 307 and the rotation angle scale mark 102), the adjustment nut 302 is tightened, so that the two telescopic arm groups located on both sides of the assembly frame 100 are adjusted to a state of horizontally opening outward, thereby fixing the positions of the two telescopic arm groups and the two rails, and during the measurement process, the assembly frame 100 is not prone to deflection, etc., thereby improving stability.

[0034] As a preferred embodiment of the present invention, Fig. 9 , 10 As shown, the adjustment assembly 400 includes an adjustment rod 401 and two adjustment tubes 402, wherein the two adjustment tubes 402 are arranged oppositely, and the two ends of the adjustment rod 401 are respectively extended into the ends of the two adjustment tubes 402 that are close to each other, and the ends of the two adjustment tubes 402 that are far away from each other are respectively rotatably connected with vertical shafts 403, and each vertical shaft 403 passes through the corresponding insertion hole 306 of the third arm body 305 along the vertical direction. After the angle of the two telescopic arms 300 on the same side is adjusted, the length of the adjustment assembly 400 connected to the two telescopic arms 300 also changes accordingly, and then one end of the elastic member is connected to the connecting ring 404 of the adjustment rod 401, and the other end of the elastic member is connected to the assembly frame 100. At this time, the elastic member is in an elastic pull-back state, so that the four limit wheels 500 are firmly fixed on the outer sides of the two rails, and the assembly frame 100 is fixed and aligned. The elastic member of this embodiment generally uses a connecting spring 600, and the connecting ring 404 can be removed from the adjustment rod 401.

[0035] As a preferred embodiment of the present invention, Figure 8 As shown, storage slots 114 are respectively provided on the side walls of the assembly frame 100. When no measurement is performed, the adjustment assembly 400 can be stored in the storage slots 114. In this embodiment, storage slots are respectively configured at both ends of the assembly frame 100. The adjustment nut 302 is loosened, and the telescopic arm 300 is retracted and rotated into the storage slot, so that the telescopic arm 300 can be stored, so as to facilitate the carrying and transfer of the assembly frame 100.

[0036] As a preferred embodiment of the present invention, Fig. 9 As shown, the limiting wheel 500 includes a wheel seat 501 and a wheel body 502, wherein the wheel seat 501 is connected to the telescopic arm 300, and the wheel body 502 is rotatably connected to the wheel seat 501, the axis of the wheel body 502 extends in the vertical direction, and an annular groove 503 is constructed on the circumferential surface of the wheel body 502, the axis of the annular groove 503 coincides with the axis of the wheel body 502, and the outer side of the rail top is located in the annular groove 503 at the corresponding position.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of protection of the claims of the utility model.

Claims

1. A special frame for measuring the track centerline with inertial navigation RTK, characterized by: The invention comprises an assembly frame arranged between the double rails of the track, two telescopic arms are respectively arranged on both sides of the assembly frame close to the double rails, a limiting wheel is arranged at one end of each telescopic arm away from the assembly frame, the limiting wheel is clamped with the outer edge of the rail top of the rail, a correction component is arranged at the center of the assembly frame, and the lower end of the inertial navigation measuring instrument is detachably connected to the correction component.

2. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 1, characterized in that: The assembly frame comprises a horizontally arranged frame body, a bowl-shaped assembly cavity is constructed at the center of the frame body, and the upper end of the bowl-shaped assembly cavity extends out of the upper end of the frame body.

3. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 2, characterized in that: The correction assembly includes an active ball joint movably assembled in a bowl-shaped assembly cavity, a connecting sleeve is constructed at the upper end of the active ball joint, the lower end of the inertial navigation measuring instrument extends into the connecting sleeve and is detachably connected to the connecting sleeve, a first connecting hole is opened at the center of one end of the frame, the first connecting hole passes through both ends of the frame, and a second connecting hole that passes through the active ball joint is opened at the center of the active ball joint. When the first connecting hole and the second connecting hole are aligned with each other, one end of the limit rod passes through the frame and the active ball joint through the first connecting hole and the second connecting hole, and a locking nut is threadedly connected to this end of the limit rod.

4. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 2, characterized in that: The bowl-shaped assembly cavity includes an upper chamber and a lower chamber connected to each other. The upper chamber is formed on the frame and passes through the upper and lower ends of the frame. A lower cover body is detachably connected to the lower end of the frame. An assembly boss is constructed at the upper end of the lower cover body, and the lower chamber is formed on the upper end surface of the assembly boss.

5. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 1, characterized in that: The telescopic arm includes a first arm body, a second arm body and a third arm body which are movably mounted in sequence from the outside to the inside, the limiting wheel is installed at the end of the third arm body, the end of the first arm body away from the limiting wheel is connected to a connecting rod, four assembly holes are opened on the assembly frame, one end of the connecting rod passes through the corresponding assembly holes, an adjusting nut is threadedly connected to one end of the connecting rod, the adjusting nut is tightened on the corresponding end surface of the assembly frame, and a retaining edge extending radially outward is constructed at the other end of the connecting rod, and the retaining edge abuts against the corresponding end surface of the assembly frame; an adjusting component is installed between the two telescopic arms on the same side, and the adjusting component is connected to the assembly frame via an elastic member.

6. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 5, characterized in that: On the end surface of the assembly frame and at each assembly hole, there are respective rotation angle scale marks, and the rotation angle scale marks are evenly arranged along the circumference of the assembly hole.

7. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 5, characterized in that: The adjustment assembly includes two adjusting tubes arranged opposite to each other. Both ends of the adjusting rod extend into the ends of the two adjusting tubes that are close to each other. The ends of the two adjusting tubes that are far away from each other are rotatably connected with vertical shafts, and each of the vertical shafts passes through the insertion hole of the third arm body in the vertical direction.

8. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 7, characterized in that: Storage slots are respectively provided on the side walls of the assembly frame, and the adjustment components can be stored in the storage slots.

9. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 5, characterized in that: Receiving grooves are respectively constructed at both ends of the assembly frame, and the telescopic arms rotate along the connecting rods and are received in the receiving grooves.

10. The special frame for measuring the track centerline of an inertial navigation RTK according to claim 1, characterized in that: The limiting wheel includes a wheel seat connected to the telescopic arm, a wheel body is rotatably connected to the wheel seat, the axis of the wheel body extends vertically, an annular groove is constructed on the circumferential surface of the wheel body, the axis of the annular groove coincides with the axis of the wheel body, and the outer side of the rail top is located in the annular groove at a corresponding position.

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