Tilt measurement calibration clamp of RTK receiver

Abstract

The utility model discloses an inclination measurement calibration clamp for an RTK receiver, and the clamp comprises a centering rod which is used for supporting and installing the RTK receiver, and the middle part of the centering rod is connected with a fixed shaft which is perpendicular to the axis of the centering rod; the angle scale is vertically and fixedly connected to the fixed shaft, and the 0-degree scale line of the centering rod is parallel to the axis of the centering rod when the centering rod is vertical; the bubble indicator is in friction rotation connection with the fixed shaft and is used for indicating an inclination angle, and when the round bubble is centered, the angle indicated by the round bubble indicator is the inclination angle; the auxiliary supporting rod is in friction rotation connection with the fixed shaft and is used for supporting the centering rod; the chassis is hinged to the lower end of the centering rod; according to the utility model, the inclination angle and the inclination direction can be accurately indicated, the stability of the centering rod in an inclination state is ensured, and the accuracy and the reliability of a calibration result are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of RTK receiver calibration, in particular to a tilt measurement calibration fixture for an RTK receiver. Background Art

[0002] In the fields of surveying, mapping, and geographic information, real-time kinematic (RTK) technology is widely used due to its high precision and real-time performance. However, traditional RTK receivers typically require the receiver to remain strictly level during the measurement process to ensure accurate results. This creates numerous operational inconveniences, particularly in complex terrain or where maintaining a level position is difficult. This limits the application of traditional RTK receivers.

[0003] To overcome this limitation, tilt measurement technology has emerged. Tilt measurement allows the receiver to accurately measure the coordinates of a point even when it is not strictly level. This technology primarily relies on sensors built into the receiver, such as accelerometers and gyroscopes, to sense the receiver's attitude. By combining satellite signals and attitude data for calculation, tilt measurement technology can achieve highly accurate measurements.

[0004] However, the performance calibration of tilt-measurement RTK receivers has become a new challenge. Existing calibration methods typically compare the coordinate differences between the receiver in a precisely leveled state and a tilted state. However, existing centering rod measurement clamps are more suitable for actual measurement rather than calibration. In particular, the lack of precise indication of the tilt angle and direction, as well as the tendency of the centering rod tip to deviate from the actual point when tilted at large angles within a plane, seriously impact the accuracy and reliability of calibration. Utility Model Content

[0005] The purpose of the utility model is to address the problems existing in the prior art and provide an RTK receiver tilt measurement calibration fixture, which can accurately indicate the tilt angle and tilt direction, while also ensuring the stability of the centering rod in a tilted state, thereby ensuring the accuracy and reliability of the calibration results.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A tilt measurement calibration fixture for an RTK receiver comprises: a centering rod for supporting and mounting the RTK receiver, wherein the middle portion of the centering rod is connected to a fixed shaft perpendicular to the axis of the centering rod; an angle disc vertically fixedly connected to the fixed shaft, wherein the 0° scale line of the angle disc is parallel to the axis of the centering rod when the centering rod is plumb; a bubble indicator frictionally rotatably connected to the fixed shaft and used to indicate the tilt angle, wherein the angle indicated by the bubble indicator is the tilt angle when the bubble is centered; an auxiliary support rod frictionally rotatably connected to the fixed shaft and used to provide support for the centering rod; and a chassis hingedly connected to the lower end of the centering rod.

[0008] The lower end of the centering rod is provided with a spherical rod tip, and the chassis is provided with a spherical groove matched with the spherical rod tip.

[0009] The chassis is provided with horizontal scale lines, and the centering rod is provided with an orientation indicating structure. The orientation indicating structure includes two indicating sheets parallel to the angle plate, and the two indicating sheets are respectively connected to radially opposite sides of the centering rod.

[0010] The lower end of the auxiliary support rod is connected to the support cross bar, and the support cross bar is used to contact the ground.

[0011] The fixed shaft connects the two auxiliary support rods arranged in parallel.

[0012] The auxiliary support rod includes an inner rod, an outer rod and a locking structure. One end of the inner rod is movably sleeved on the outer rod, and the other end of the inner rod is frictionally and rotationally connected to the fixed shaft; the locking structure is provided on the outer rod for locking the telescopic position of the inner rod.

[0013] The locking structure includes a mounting seat, a spring and a pressing plate. The mounting seat is connected to the spring, and the spring is connected to the pressing plate. The pressing plate is pressed against the outer wall of the inner rod under the action of the spring force, and the inner rod is braked under the action of friction force.

[0014] The fixed shaft is connected to a shaft sleeve, the shaft sleeve is fixedly sleeved on the centering rod, and the fixed shaft is connected to the centering rod through the shaft sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By combining the round bubble and the angle indication structure, it can accurately indicate the tilt angle; combined with the azimuth indication structure, it can indicate the tilt direction, meeting the comprehensive needs of tilt calibration;

[0017] 2. The spherical rod tip structure makes the centering rod more flexible when tilting or rotating, avoiding the disadvantage of the conical rod tip deviating from the point when tilted;

[0018] 3. The design of the auxiliary support rod enhances the overall stability of the fixture, especially when performing large-angle tilt measurements, which can effectively prevent the fixture from tipping over;

[0019] 4. The auxiliary support rod is designed with an adjustable length structure, which can be adjusted according to actual needs, increasing the applicability and flexibility of the clamp, enabling it to adapt to different terrains and calibration requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of a calibration fixture in one embodiment of the present application;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0023] Figure 3 This is a structural diagram of the chassis part in one embodiment of the present application;

[0024] In the figure: 1. Centering rod; 1a. Spherical rod tip; 1b. Indicator sheet; 2. Fixed shaft; 3. Angle plate; 4. Bubble indicator; 5. Auxiliary support rod; 6. Chassis; 3. Angle plate; 4. Bubble indicator; 5. Auxiliary support rod; 5a. Support cross bar; 5b. Inner rod; 5c. Outer rod; 5d. Locking structure; 6. Chassis; 7. Bushing. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] This application provides a tilt measurement calibration fixture for RTK receivers. It accurately indicates the tilt angle and tilt direction while ensuring the stability of the centering rod when tilted, guaranteeing the accuracy and reliability of the calibration results. The fixture primarily includes: a centering rod 1, a fixed axis 2, an angle disc 3, a bubble indicator 4, an auxiliary support rod 5, and a chassis 6.

[0030] refer to Figures 1 to 3 , each component will be described in detail below with reference to the accompanying drawings.

[0031] The centering rod 1 is the main supporting structure of the clamp and is used to install and support the RTK receiver. The centering rod 1 is designed to be upright, and a spherical rod tip 1a is provided at its lower end, which makes the centering rod 1 more flexible when tilting or rotating, avoiding the disadvantage that the traditional conical rod tip is easy to deviate from the point when tilted. The spherical rod tip 1a cooperates with the spherical groove on the chassis 6 to ensure the stability of the centering rod 1 during tilting and rotation.

[0032] The fixed shaft 2 is perpendicular to the axis of the centering rod 1 and is connected to the middle part of the centering rod 1, and is fixedly connected to the centering rod 1 through the bushing 7; the bushing 7 is tightly fitted on the centering rod 1, providing a stable support for the fixed shaft 2; the fixed shaft 2 is used to support the components connected to it so that they can rotate freely around their axis.

[0033] Angle disc 3 is vertically fixed on the fixed shaft 2. When the centering rod is plumb, its 0° scale line is parallel to the axis of the centering rod 1. The scale range of the angle disc 3 is -60° to +60°, which can cover most tilt calibration needs.

[0034] Bubble indicator 4; the bubble indicator 4 is frictionally connected to the fixed shaft 2 and is used to indicate the tilt angle; when the circular bubble is centered, the angle indicated by the bubble indicator 4 is the current tilt angle. The bubble indicator 4 enables the operator to read the tilt angle intuitively and quickly, thereby improving calibration efficiency.

[0035] Auxiliary support rod 5, the auxiliary support rod 5 is frictionally connected to the fixed shaft 2 for providing additional support to the centering rod 1; the auxiliary support rod 5 enhances the overall stability of the clamp, especially when performing large-angle tilt measurements, and can effectively prevent the clamp from tipping over; the lower end of the auxiliary support rod 5 is connected to a supporting cross bar 5a, which is in contact with the ground, increasing the support area and stability of the clamp.

[0036] The auxiliary support rod 5 also has a telescopic function to adapt to calibration requirements at different heights; specifically, the auxiliary support rod 5 includes an inner rod 5b, an outer rod 5c and a locking structure 5d; one end of the inner rod 5b is movably sleeved on the outer rod 5c, and the other end is frictionally and rotationally connected to the fixed shaft 2; the locking structure 5d is provided on the outer rod 5c, for locking the telescopic position of the inner rod 5b.

[0037] Specifically, the locking structure 5d comprises a mounting base, a spring, and a pressing plate. The mounting base is connected to the spring, which is connected to the pressing plate. The pressing plate abuts against the inner rod 5b. Under the elastic force of the spring, the pressing plate presses against the outer wall of the inner rod 5b, and the inner rod 5b is braked by the friction of the pressing plate. This allows the length of the auxiliary support rod 5 to be adjusted according to actual needs.

[0038] Chassis 6 is hingedly connected to the lower end of the centering rod 1, providing a stable base for the clamp; a horizontal scale line is provided on the chassis 6 to indicate the horizontal direction. By cooperating with the orientation indicating structure on the center rod 1, the horizontal scale line of the chassis 6 can help the operator accurately control the tilt direction.

[0039] Specifically, the azimuth indicating structure includes two indicating sheets 1b parallel to the angle plate 3. The two indicating sheets 1b are respectively connected to two radially opposite sides of the centering rod 1, so that the operator can clearly see the current tilt direction.

[0040] Working principle and operation process:

[0041] Install the RTK receiver on the centering pole 1, ensuring that the axis of the receiver is aligned with that of the centering pole 1; then, place the fixture at the position to be calibrated, ensuring that the chassis 6 is in stable contact with the ground.

[0042] According to the calibration requirements, point the bubble indicator 4 to the target tilt angle on the angle disk 3; then, tilt the centering rod 1 so that the circular bubble is centered in the bubble indicator 4; at this time, the angle indicated by the bubble indicator 4 on the angle disk 3 is the current tilt angle; by adjusting the tilt angle of the centering rod 1, the RTK receiver can be calibrated at different tilt angles.

[0043] The current tilt direction can be determined by observing the coincidence of the orientation indicator structure on the centering rod 1 and the horizontal scale line on the chassis 6. The tilt direction can be precisely controlled by adjusting the rotation angle of the centering rod 1.

[0044] When performing large-angle tilt calibration, the auxiliary support rod 5 can be unfolded to make it contact the ground to provide additional support for the clamp; according to the calibration requirements, the length and angle of the auxiliary support rod 5 can be adjusted to ensure the stability and accuracy of the clamp.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tilt measurement calibration fixture for an RTK receiver, characterized in that: include: A centering rod (1) is used to support and install an RTK receiver, wherein a fixed shaft (2) perpendicular to the axis of the centering rod (1) is connected to the middle of the centering rod (1); An angle disc (3) is vertically fixedly connected to the fixed shaft (2), and when the centering rod is vertical, its 0° scale line is parallel to the axis of the centering rod (1); A bubble indicator (4) is frictionally connected to the fixed shaft (2) and is used to indicate the tilt angle. When the circular bubble is centered, the angle indicated by the circular bubble indicator (4) is the tilt angle. An auxiliary support rod (5) is frictionally connected to the fixed shaft (2) and is used to provide support for the centering rod (1); The chassis (6) is hingedly connected to the lower end of the centering rod (1).

2. The tilt measurement calibration fixture for an RTK receiver according to claim 1, characterized in that: The lower end of the centering rod (1) is provided with a spherical rod tip (1a), and the chassis (6) is provided with a spherical groove that matches the spherical rod tip (1a).

3. The tilt measurement calibration fixture for an RTK receiver according to claim 1, wherein: The chassis (6) is provided with horizontal engraved lines, and the centering rod (1) is provided with an orientation indicating structure, the orientation indicating structure comprising two indicating sheets (1b) parallel to the angle disk (3), the two indicating sheets (1b) being respectively connected to radially opposite sides of the centering rod (1).

4. The tilt measurement calibration fixture for an RTK receiver according to claim 1, wherein: The lower end of the auxiliary support rod (5) is connected to a support crossbar (5a), and the support crossbar (5a) is used to contact the ground.

5. The tilt measurement calibration fixture for an RTK receiver according to claim 1, characterized in that: The fixed shaft (2) connects the two auxiliary support rods (5) arranged in parallel.

6. The tilt measurement calibration fixture for an RTK receiver according to claim 1, characterized in that: The auxiliary support rod (5) comprises an inner rod (5b), an outer rod (5c) and a locking structure (5d); one end of the inner rod (5b) is movably sleeved on the outer rod (5c), and the other end of the inner rod (5b) is frictionally connected to the fixed shaft (2); the locking structure (5d) is provided on the outer rod (5c) and is used to lock the telescopic position of the inner rod (5b).

7. The tilt measurement calibration fixture for an RTK receiver according to claim 6, characterized in that: The locking structure (5d) comprises a mounting seat, a spring and a pressing plate, wherein the mounting seat is connected to the spring, and the spring is connected to the pressing plate. The pressing plate is pressed against the outer wall of the inner rod (5b) under the action of the spring force, and the inner rod (5b) is braked under the action of friction force.

8. The tilt measurement calibration fixture for an RTK receiver according to claim 1, wherein: The fixed shaft (2) is connected to a shaft sleeve (7), the shaft sleeve (7) is fixedly sleeved on the centering rod (1), and the fixed shaft (2) is connected to the centering rod (1) via the shaft sleeve (7).

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