A GNSS measurement accuracy detector and use method

Abstract

The invention discloses a GNSS measurement accuracy detector, comprising: a GNSS module; a lifting measurement mechanism, the GNSS module is connected to the lifting measurement mechanism, the lifting measurement mechanism is used to measure the lifting height of the GNSS module; a first horizontal measurement mechanism, the GNSS module is connected to the lifting measurement mechanism through the first horizontal measurement mechanism, the first horizontal measurement mechanism is used to measure the displacement of the GNSS module in the first horizontal direction; a second horizontal measurement mechanism, the GNSS module is connected to the second horizontal measurement mechanism, the second horizontal measurement mechanism is used to measure the displacement of the GNSS module in the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, so as to solve the problems of inconvenient carrying and long and unintuitive measurement process in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of GNSS devices, and in particular to a GNSS measurement accuracy detector and a use method thereof. Background Art

[0002] The GNSS module can be used to locate the three-dimensional coordinates of the current GNSS module. In the process of developing, manufacturing or selling GNSS equipment, it is often necessary to test or demonstrate the positioning accuracy of the GNSS module. The existing technology detects the positioning accuracy of the GNSS module by manually moving the GNSS module and then manually measuring the moving distance of the GNSS module, and comparing the coordinate position changes measured by GNSS with the coordinate position changes measured manually. The problems of the existing technology are:

[0003] 1) When moving the GNSS module, a support object is often needed to place the GNSS module so that the GNSS module is placed in a specified position. However, for sales scenarios that require demonstrations, it is very inconvenient to carry a bunch of support blocks;

[0004] 2) The measurement process is long and non-intuitive, which makes it difficult for the audience to be interested and is not conducive to product sales. Summary of the invention

[0005] In order to solve the above shortcomings and deficiencies of the prior art, an object of the present invention is to provide a GNSS measurement accuracy detector and a method of use.

[0006] The technical solution of the present invention is: a GNSS measurement accuracy detector, comprising:

[0007] GNSS module;

[0008] A lifting and measuring mechanism, the GNSS module is connected to the lifting and measuring mechanism, and the lifting and measuring mechanism is used to measure the lifting height of the GNSS module;

[0009] A first horizontal measurement mechanism, wherein the GNSS module is connected to the lifting measurement mechanism through the first horizontal measurement mechanism, and the first horizontal measurement mechanism is used to measure the displacement of the GNSS module in a first horizontal direction;

[0010] The second horizontal measurement mechanism is connected to the GNSS module, and the second horizontal measurement mechanism is used to measure the displacement of the GNSS module in a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0011] Furthermore, the lifting and measuring mechanism comprises:

[0012] Base;

[0013] A first screw rod, one end of which is rotatably connected to the upper surface of the base through a bearing, and the first screw rod is parallel to the upper surface of the base;

[0014] A first knob, wherein the first knob is cylindrical, the first knob has a diameter greater than the first screw rod, the first knob is coaxial with the first screw rod, and the first knob is fixedly connected to the upper end of the first screw rod;

[0015] A vertical ruler, the lower end of which is fixedly connected to the upper surface of the base, and the vertical ruler is parallel to the first screw rod;

[0016] A lifting platform, wherein the GNSS module is connected to the lifting platform, the lifting platform is rectangular, and two corners of the lifting platform are respectively provided with a first screw hole and a measuring hole, the first screw hole matches with a first screw rod, the first screw rod is threadedly connected to the first screw hole, the measuring hole matches with a vertical ruler, and the vertical ruler is slidably connected in the measuring hole.

[0017] Furthermore, the lifting and measuring mechanism further comprises:

[0018] A graduated cone, the graduated cone being fixedly connected to the lower part of the first screw, the bottom surface diameter of the graduated cone being larger than the diameter of the first screw, the graduated cone being coaxial with the first screw, the lower surface of the graduated cone being attached to the upper surface of the base, the side surface of the graduated cone close to the base being provided with a first scale, the first scale dividing one circle of the graduated cone into 50 equal parts;

[0019] A first indicator needle, the first indicator needle is fixedly connected to the upper surface of the base, the tip width of the first indicator needle is smaller than the minimum scale of the first scale, and the tip of the first indicator needle is located at the edge of the lower surface of the scale cone;

[0020] The pitch of the first screw rod is 0.5 mm.

[0021] Furthermore, the first level measuring mechanism comprises:

[0022] A horizontal moving block, wherein the GNSS module is fixedly connected to an upper surface of the horizontal moving block, and a second screw hole and a third screw hole are provided on the horizontal moving block, wherein the second screw hole and the third screw hole are perpendicular to each other and do not intersect, wherein a central axis of the second screw hole is perpendicular to a Z axis of the GNSS module, and a central axis of the third screw hole is perpendicular to the Z axis of the GNSS module;

[0023] A first slide groove, wherein the first slide groove comprises two first slide grooves, the two first slide grooves are arranged on two opposite side edges of the lifting platform, the two first slide grooves are parallel to each other, and a first horizontal scale along the length direction of the first slide groove is provided on a side surface of one of the first slide grooves;

[0024] A first slider, wherein the first slider includes two first sliders, the first sliders match the first slide grooves, the two first sliders are slidably connected in the two first slide grooves respectively, the first slider is provided with a first rotating hole perpendicular to the first slide groove, a coaxial bearing is fixedly connected in the first rotating hole, and the central axis of the first rotating hole and the central axis of the second screw hole are located on the same plane perpendicular to the central axis of the first screw rod;

[0025] A second screw rod, both ends of which are fixedly connected to the first screw holes of the two first sliders through bearings, the second screw rod matches the second screw hole, and the second screw rod is threadedly connected to the second screw hole;

[0026] The second level measuring mechanism comprises:

[0027] A second slide groove, wherein the second slide groove includes two second slide grooves, the two second slide grooves are opened on two opposite side edges of the lifting platform, the second slide groove is perpendicular to the first slide groove, the two second slide grooves are parallel to each other, and a second horizontal scale along the length direction of the second slide groove is provided on a side surface of one of the second slide grooves;

[0028] A second slider, the second slider includes two sliders, the second sliders match the second slide grooves, the two second sliders are slidably connected in the two second slide grooves respectively, the second slider is provided with a second rotating hole perpendicular to the second slide groove, a coaxial bearing is fixedly connected in the second rotating hole, and the central axis of the second rotating hole and the central axis of the third screw hole are located on the same plane perpendicular to the central axis of the first screw rod;

[0029] The third screw rod, both ends of which are fixedly connected to the second rotating holes of the two second sliding blocks through bearings, the third screw rod matches the third screw hole, and the third screw rod is threadedly connected to the third screw hole.

[0030] Furthermore, the first level measurement mechanism further includes:

[0031] A first scale column, wherein the first scale column is fixedly connected to an end of the second screw rod near the first horizontal scale, the first scale column is coaxial with the second screw rod, and a second scale is provided on a side surface of the first scale column near the first slider, and the second scale divides one circle of the first scale column into 50 equal parts;

[0032] A second indicator needle, the second indicator needle is fixedly connected to the upper surface of the first slider, the tip width of the second indicator needle is smaller than the minimum scale of the second scale, and the tip of the second indicator needle is located at the edge of the first slider close to the first scale column;

[0033] The pitch of the second screw is 0.5 mm;

[0034] The second level measuring mechanism also includes:

[0035] A second scale column, wherein the second scale column is fixedly connected to the end of the third screw rod near the second horizontal scale, the second scale column is coaxial with the third screw rod, and a third scale is provided on the side surface of the second scale column near the second slider, and the third scale divides one circle of the second scale column into 50 equal parts;

[0036] A third indicator needle, the third indicator needle is fixedly connected to the upper surface of the second slider, the needle tip width of the third indicator needle is smaller than the minimum scale of the third scale, and the needle tip of the third indicator needle is located at the edge of the second slider close to the second scale column;

[0037] The pitch of the third screw rod is 0.5 mm.

[0038] Furthermore, it also includes:

[0039] Controller;

[0040] A display, the display being electrically connected to the controller;

[0041] A first laser rangefinder, wherein the first laser rangefinder is arranged on the upper surface of the base, the laser emitted by the first laser rangefinder irradiates the lower surface of the lifting platform, the laser emission direction of the first laser rangefinder is parallel to the central axis of the first screw rod, and the first laser rangefinder is electrically connected to the controller;

[0042] A second laser rangefinder, wherein the second laser rangefinder is arranged at the end of the first slide groove, the laser emission direction of the second laser rangefinder is parallel to the first slide groove, the laser emitted by the second laser rangefinder irradiates the surface of the first slider, and the second laser rangefinder is electrically connected to the controller;

[0043] A third laser rangefinder is arranged at the end of the second slide groove, the laser emission direction of the third laser rangefinder is parallel to the second slide groove, the laser emitted by the third laser rangefinder irradiates the surface of the second slider, and the third laser rangefinder is electrically connected to the controller.

[0044] Furthermore, it also includes:

[0045] An angle measuring device is arranged between the scale cone and the base, the angle measuring device is arranged between the first slider and the first scale column, the angle measuring device is arranged between the second slider and the second scale column, and the angle measuring device is electrically connected to the controller.

[0046] Furthermore, the angle measuring device comprises:

[0047] A first capacitance measuring module, wherein the first capacitance measuring module is electrically connected to the controller;

[0048] a second capacitance measuring module, wherein the second capacitance measuring module is electrically connected to the controller;

[0049] A first fixed capacitor plate, the first fixed capacitor plate is made of metal, the first fixed capacitor plate is in a semicircular shape, and the first fixed capacitor plate is electrically connected to the first capacitance measurement module;

[0050] A rotating capacitor plate, wherein the rotating capacitor plate has the same shape as the first fixed capacitor plate, the rotating capacitor plate is parallel to the first fixed capacitor plate, the rotating capacitor plate is coaxial with the first fixed capacitor plate, the rotating capacitor plate is electrically connected to the first capacitance measurement module, and the rotating capacitor plate is electrically connected to the second capacitance measurement module;

[0051] A second fixed capacitor plate, wherein the second fixed capacitor plate is in the shape of a quarter ring, the inner diameter and the outer diameter of the second fixed capacitor plate are the same as those of the first fixed capacitor plate, the second fixed capacitor plate is parallel to the rotating capacitor plate, the second fixed capacitor plate is coaxial with the rotating capacitor plate, the reference plane is parallel to the first fixed capacitor plate, the projections of the first fixed capacitor plate and the second fixed capacitor plate on the reference plane are a complete ring, the spacing between the second fixed capacitor plate and the rotating capacitor plate is not equal to the spacing between the first fixed capacitor plate and the rotating capacitor plate, and the second fixed capacitor plate is electrically connected to the second capacitance measurement module.

[0052] A method for using the GNSS measurement accuracy detector, the method comprising:

[0053] Height change value ΔH measurement: The first laser rangefinder measures the initial position of the lifting platform and sends it to the controller. The controller takes the initial height head value A0 above millimeters. The angle measuring device measures the angle θ0 of the scale cone and sends it to the controller. The controller calculates the initial height tail value Then the initial accurate value of the height H0 = A0 + B0 is obtained; the first laser rangefinder measures the end position of the lifting platform and sends it to the controller, the controller takes the height end head value A1 above millimeters, the angle measuring device measures the angle θ1 of the scale cone and sends it to the controller, and the controller calculates the height end tail value Then the accurate value of the height endpoint is obtained H1=A1+B1; the controller calculates ΔH=H1-H0;

[0054] Measurement of the first horizontal direction change value ΔX: The second laser rangefinder measures the initial position of the first slider and sends it to the controller. The controller takes the first horizontal direction initial head value C0 above millimeters. The angle measuring device measures the angle φ0 of the first scale column and sends it to the controller. The controller calculates the first horizontal direction initial tail value Then the initial accurate value of the first horizontal direction X0=C0+D0 is obtained; the second laser rangefinder measures the end position of the first slider and sends it to the controller, the controller takes the lifting end head value C1 above millimeters, the angle measuring device measures the angle φ1 of the first scale column and sends it to the controller, and the controller calculates the end tail value of the first horizontal direction Then, the accurate value of the first horizontal direction end point is obtained as X1 = C1 + D1; the controller calculates ΔX = X1 - X0;

[0055] Measurement of the change value ΔY in the second horizontal direction: The third laser rangefinder measures the initial position of the second slider and sends it to the controller. The controller takes the initial head value E0 in the second horizontal direction above millimeters. The angle measuring device measures the angle ψ0 of the first scale column and sends it to the controller. The controller calculates the initial tail value in the second horizontal direction Then, the accurate value of the initial lifting measurement is obtained as Y0 = E0 + F0; the third laser rangefinder measures the end position of the second slider and sends it to the controller. The controller takes the end head value E1 in the lifting above millimeters. The angle measuring device measures the angle ψ1 of the first scale column and sends it to the controller. The controller calculates the end tail value in the second horizontal direction Then, the accurate value of the second horizontal direction end point is obtained as Y1 = E1 + F1; the controller calculates ΔY = Y1 - Y0.

[0056] Furthermore, the angle measurement method of the angle measuring device is as follows:

[0057] The first capacitance measurement module reads the capacitance value C1 between the first fixed capacitor plate and the rotating capacitor plate and sends it to the controller, calculates the included angle ω between the chord of the rotating capacitor plate and the chord of the first fixed capacitor plate, ω = 180*(C1 / C1max), where C1max is the maximum capacitance value between the first fixed capacitor plate and the rotating capacitor plate, C2max is the maximum capacitance value between the second fixed capacitor plate and the rotating capacitor plate, the rotation angle β of the rotating capacitor plate refers to the angle that the rotating capacitor plate rotates around its own rotation axis starting from the chord of the first fixed capacitor plate. The second capacitance measurement module reads the capacitance value C2 between the second fixed capacitor plate and the rotating capacitor plate and sends it to the controller. The controller determines that if C2 = 0 and C1 = C1max, then the rotation angle β of the rotating capacitor plate = ω; the controller determines that if C2 > 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate = ω; the controller determines that if C2 = C2max and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate = ω; the controller determines that if C2 > 0 and C1 = 0, then the rotation angle β of the rotating capacitor plate = ω; the controller determines that if C2 > 0 and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate = ω + 180°; the controller determines that if C2 = 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate = ω + 180°.

[0058] The beneficial effects of the present invention are: Compared with the prior art,

[0059] 1) The present invention changes and measures the height of the GNSS module through a lifting measurement mechanism, changes and measures the position of the GNSS module in the first horizontal direction through a first horizontal measurement mechanism, and changes and measures the position of the GNSS module in the second horizontal direction through a second horizontal measurement mechanism, so that the position change of the GNSS module does not require a support block, but is integrated into an overall structure, making the device more portable. At the same time, the change in the position of the GNSS module is decomposed into three dimensions, which correspond to the three dimensions measured by the GNSS module, and the measurement error of each dimension can be intuitively displayed. Finally, due to the synchronization of the position change and the measurement, the demonstration process time is shortened;

[0060] 2) The present invention defines the position of the lifting platform in the horizontal plane by the first screw rod and the vertical ruler, the first screw rod is rotated in the first screw hole to change the position of the lifting platform in the vertical direction, and the position of the lifting platform is measured by the vertical ruler, thereby realizing the position adjustment and measurement of the GNSS module in the vertical direction;

[0061] 3) The present invention sets the pitch of the first screw rod to 0.5 mm, arranges a graduated cone on the first screw rod, and arranges a first indicator needle on the upper surface of the base, so that the relative motion between the first screw rod and the lifting platform is amplified, and by combining with a vertical ruler, the relative position change measurement result of the lifting platform and the first screw rod is accurately measured to 0.01 mm, so that the device can demonstrate the measurement error of GNSS with an accuracy of 0.01 mm in the vertical position change;

[0062] 4) The present invention changes the position of the GNSS module in the first horizontal direction by rotating the second screw rod in the second screw hole, and changes the position of the GNSS module in the second horizontal direction by rotating the third screw rod in the third screw hole. The second screw rod and the third screw rod cooperate with each other so that the Z axis of the GNSS module on the horizontal moving block does not tilt, and then the position changes of the first slider and the second slider are obtained by changing the first horizontal direction scale and the second horizontal direction scale;

[0063] 5) The present invention sets the pitch of the second screw rod to 0.5 mm, and sets a first scale column on the second screw rod, and sets a second indicator needle on the upper surface of the first slider, so that the relative movement between the second screw rod and the first movable block is amplified, and by combining with the first horizontal direction scale, the relative position change measurement result between the first movable block and the second screw rod is accurate to 0.01 mm, so that the device can demonstrate the measurement error of GNSS when the first horizontal direction position change is 0.01 mm; the pitch of the third screw rod is set to 0.5 mm, and a second scale column is set on the third screw rod, and a third indicator needle is set on the upper surface of the second slider, so that the relative movement between the third screw rod and the second movable block is amplified, and by combining with the second horizontal direction scale, the relative position change measurement result between the second movable block and the third screw rod is accurate to 0.01 mm, so that the device can demonstrate the measurement error of GNSS when the second horizontal direction position change is 0.01 mm.

[0064] 6) The present invention measures the distance value of the lifting platform with millimeter accuracy by the first laser rangefinder, measures the distance value of the first slider with millimeter accuracy by the second laser rangefinder, measures the distance value of the third slider with millimeter accuracy by the third laser rangefinder, and displays them on the display, so that the position change of the GNSS module in the first horizontal direction and the second horizontal direction can be displayed quickly and intuitively, the measurement speed is faster, and the display is more intuitive;

[0065] 7) Since the measurement accuracy of the laser rangefinder can only reach 1mm, the measurement accuracy is not enough. The present invention first converts the distance of the lifting platform moving up and down into the angle change of the scale cone relative to the first indicator needle through the scale cone, and the first scale column converts the movement distance of the first movable block in the first horizontal direction into the angle change of the first scale column relative to the second indicator needle. The second scale column converts the movement distance of the second movable block in the first horizontal direction into the angle change of the second scale column relative to the third indicator needle. The angle change measured by the angle measuring device, the measurement values ​​of the first laser rangefinder, the second laser rangefinder and the third laser rangefinder are used to calculate the position change of the lifting platform in the vertical direction, the position change of the first movable block in the first horizontal direction, and the position change of the second movable block in the second horizontal direction. The measurement accuracy is higher and the measurement speed is faster.

[0066] 8) The present invention obtains the angle between the chord of the rotating capacitor plate and the chord of the first fixed capacitor plate by changing the capacitance value between the rotating capacitor plate and the first fixed capacitor plate, and then determines the rotation angle β of the rotating capacitor plate in combination with the capacitance value between the rotating capacitor plate and the second fixed capacitor plate, so that the controller calculates the position change of the lifting platform in the vertical direction, the position change of the first movable block in the first horizontal direction, and the position change of the second movable block in the second horizontal direction according to β in combination with the measurement values ​​of the first laser rangefinder, the second laser rangefinder and the third laser rangefinder, so that the measurement accuracy is higher and the measurement speed is faster;

[0067] 9) The present invention measures the starting point and end point of the height of the lifting platform by a first laser rangefinder to obtain a head value, and uses an angle measuring device to obtain a tail value from the angle of the starting point and end point of the scale cone, and combines the head value and the tail value to obtain an accurate change in the height of the lifting platform; measures the starting point and end point of the first movable block in the first horizontal direction by a second laser rangefinder to obtain a head value, and uses an angle measuring device to obtain a tail value from the angle of the starting point and end point of the scale cone, and combines the head value and the tail value to obtain an accurate change in the distance of the first movable block in the first horizontal direction; measures the starting point and end point of the second movable block in the second horizontal direction by a third laser rangefinder to obtain a head value, and uses an angle measuring device to obtain a tail value from the angle of the starting point and end point of the scale cone, and combines the head value and the tail value to obtain an accurate change in the distance of the second movable block in the second horizontal direction; compared with the prior art that only uses a single laser rangefinder to measure the distance change, the present invention is more accurate;

[0068] 10) The present invention first obtains the angle between the chord of the rotating capacitor plate and the chord of the first fixed capacitor plate by changing the capacitance value between the rotating capacitor plate and the first fixed capacitor plate, and then determines the rotation angle β of the rotating capacitor plate in combination with the capacitance value between the rotating capacitor plate and the second fixed capacitor plate, so that the controller calculates the position change of the lifting platform in the vertical direction, the position change of the first movable block in the first horizontal direction, and the position change of the second movable block in the second horizontal direction according to β combined with the measurement values ​​of the first laser rangefinder, the second laser rangefinder and the third laser rangefinder. Compared with the prior art that measures the angle only by the capacitance value between the two capacitor plates, the angle range measured by the prior art is 0-180°, while the angle range measured by the present invention is 0-360°, which can realize the measurement of the angle of the rotating capacitor plate rotating around its own rotation axis with the chord of the first fixed capacitor plate as the starting point, and the measurement range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic diagram of the three-dimensional structure of implementation example 1 of the present invention;

[0070] Figure 2 for Figure 1 Partial view at F in the middle;

[0071] Figure 3 for Figure 1 Partial view at G in the middle;

[0072] Figure 4 for Figure 1 Partial view at E in the middle;

[0073] Figure 5 for Figure 1 Partial view at H in the middle;

[0074] Figure 6 It is an exploded view of implementation example 1 of the present invention;

[0075] Figure 7 for Figure 6 Partial view at J in the middle;

[0076] Figure 8 for Figure 6 Partial view at K in the middle;

[0077] Fig. 9 for Figure 6 Partial view at L in the middle;

[0078] Fig.10 It is a three-dimensional structural schematic diagram of another viewing angle of implementation example 1 of the present invention;

[0079] Fig.11 for Fig.10 Partial view at I in the middle;

[0080] Fig.12 This is a schematic diagram of the structure of the first scale column of Embodiment 1 of the present invention;

[0081] Fig.13 for Fig.12 Section view at the QQ section line;

[0082] Fig.14 for Fig.12 Section view at the RR section line;

[0083] Fig.15 for Fig.12 Section view at the TT section line;

[0084] Fig.16 This is a circuit structure block diagram of implementation example 1 of the present invention. DETAILED DESCRIPTION

[0085] The invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0086] Example 1: Reference Figures 1 to 16The technical solution of the present invention is: a GNSS measurement accuracy detector, comprising: a GNSS module 1, which can be a GNSS board; a lifting measurement mechanism 2, which can be a telescopic rod with a scale, the GNSS module 1 is connected to the lifting measurement mechanism 2, and the lifting measurement mechanism 2 is used to measure the lifting height of the GNSS module 1; a first horizontal measurement mechanism 3, which can be a slide with a scale, the GNSS module 1 is connected to the lifting measurement mechanism 2 through the first horizontal measurement mechanism 3, and the first horizontal measurement mechanism 3 is used to measure the displacement of the GNSS module 1 in a first horizontal direction; a second horizontal measurement mechanism 4, the GNSS module 1 is connected to the second horizontal measurement mechanism 4, the second horizontal measurement mechanism 4 can be a slide with a scale, and the second horizontal measurement mechanism 4 is used to measure the displacement of the GNSS module 1 in a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0087] Furthermore, the lifting and measuring mechanism 2 includes: a base 2-6; a first screw rod 2-1, one end of which is rotatably connected to the upper surface of the base 2-6 through a bearing, and the first screw rod 2-1 is parallel to the upper surface of the base 2-6; a first knob 2-3, the first knob 2-3 is cylindrical, the diameter of the first knob 2-3 is larger than the first screw rod 2-1, the first knob 2-3 is coaxial with the first screw rod 2-1, and the first knob 2-3 is fixedly connected to the upper end of the first screw rod 2-1; a vertical ruler 2-2, the lower end of the vertical ruler 2-2 is welded and connected On the upper surface of the base 2-6, the vertical scale 2-2 is parallel to the first screw rod 2-1; the lifting platform 2-4, the GNSS module 1 is connected to the lifting platform 2-4, the lifting platform 2-4 is rectangular, and the two corners of the lifting platform 2-4 are respectively provided with a first screw hole 2-4-1 and a measuring hole 2-4-2, the first screw hole 2-4-1 matches the first screw rod 2-1, the first screw rod 2-1 is threadedly connected to the first screw hole 2-4-1, the measuring hole 2-4-2 matches the vertical scale 2-2, and the vertical scale 2-2 is slidably connected in the measuring hole 2-4-2. In order to make the up and down movement of the lifting platform 2-4 more stable, two sliding rods parallel to the first screw rod 2-1 can be welded and connected at the other two corners of the base 2-6, and two sliding holes that pass through up and down are opened at the corresponding positions of the lifting platform 2-4, the sliding holes match the sliding rods, and the sliding rods are slidably connected in the sliding holes.

[0088] Furthermore, the lifting and measuring mechanism 2 also includes: a scale cone 2-5, the scale cone 2-5 is fixedly connected to the lower part of the first screw rod 2-1, the bottom diameter of the scale cone 2-5 is larger than the diameter of the first screw rod 2-1, the scale cone 2-5 is coaxial with the first screw rod 2-1, the lower surface of the scale cone 2-5 is attached to the upper surface of the base 2-6, and the side surface of the scale cone 2-5 close to the base 2-6 is provided with a first scale 2-5-1, and the first scale 2-5-1 divides a circle of the scale cone 2-5 into 50 parts; a first indicator needle 2-7, the first indicator needle 2-7 is fixedly connected to the upper surface of the base 2-6, the needle tip width of the first indicator needle 2-7 is smaller than the minimum scale of the first scale 2-5-1, and the needle tip of the first indicator needle 2-7 is located at the edge of the lower surface of the scale cone 2-5; the pitch of the first screw rod 2-1 is 0.5mm.

[0089] Furthermore, the first horizontal measurement mechanism 3 includes: a horizontal moving block 3-1, the GNSS module 1 is fixedly connected to the upper surface of the horizontal moving block 3-1, and the horizontal moving block 3-1 is provided with a second screw hole 3-1-1 and a third screw hole 3-1-2, the second screw hole 3-1-1 and the third screw hole 3-1-2 are perpendicular to each other and do not intersect, the central axis of the second screw hole 3-1-1 is perpendicular to the Z axis of the GNSS module 1, and the central axis of the third screw hole 3-1-2 is perpendicular to the Z axis of the GNSS module 1; a first slide groove 3-2, the first slide groove 3-2 includes two, the two first slide grooves 3-2 are opened on the opposite side edges of the lifting platform 2-4, the two first slide grooves 3-2 are parallel to each other, and one of them The side surface of the first slide groove 3-2 is provided with a first horizontal scale 3-5 along the length direction of the first slide groove 3-2; the first slider 3-3, the first slider 3-3 includes two, the first slider 3-3 matches the first slide groove 3-2, the two first sliders 3-3 are slidably connected in the two first slide grooves 3-2 respectively, the first slider 3-3 is provided with a first rotary hole 3-3-1 perpendicular to the first slide groove 3-2, the first rotary hole 3-3-1 is fixedly connected with a coaxial bearing, the central axis of the first rotary hole 3-3-1 and the central axis of the second screw hole 3-1-1 are located on the same plane perpendicular to the central axis of the first screw rod 2-1; the second screw rod 3-4, the two ends of the second screw rod 3-4 are fixed by bearings The second screw rod 3-4 is matched with the second screw hole 3-1-1 and the second screw rod 3-4 is threadedly connected in the second screw hole 3-1-1; the second level measuring mechanism 4 comprises: a second slide groove 4-1, the second slide groove 4-1 comprises two, the two second slide grooves 4-1 are opened on the two opposite sides of the lifting platform 2-4, the second slide groove 4-1 is perpendicular to the first slide groove 3-2, the two second slide grooves 4-1 are parallel to each other, and the side surface of one of the second slide grooves 4-1 is provided with a second horizontal scale 4-4 along the length direction of the second slide groove 4-1; the second slider 4-3, the second slider 4-3 comprises two, the second slider 4-3 Matching the second slide groove 4-1, the two second sliders 4-3 are respectively slidably connected in the two second slide grooves 4-1, and the second slider 4-3 is provided with a second rotary hole 4-3-1 perpendicular to the second slide groove 4-1, and the second rotary hole 4-3-1 is fixedly connected with a coaxial bearing, and the central axis of the second rotary hole 4-3-1 and the central axis of the third screw hole 3-1-2 are located on the same plane perpendicular to the central axis of the first screw rod 2-1; the third screw rod 4-2, the two ends of the third screw rod 4-2 are fixedly connected to the second rotary holes 4-3-1 of the two second sliders 4-3 through bearings, the third screw rod 4-2 matches the third screw hole 3-1-2, and the third screw rod 4-2 is threadedly connected in the third screw hole 3-1-2.

[0090] Furthermore, the first level measuring mechanism 3 also includes: a first scale column 3-7, the first scale column 3-7 is fixedly connected to the end of the second screw rod 3-4 near the first horizontal direction scale 3-5, the first scale column 3-7 is coaxial with the second screw rod 3-4, and the side surface of the first scale column 3-7 near the first slider 3-3 is provided with a second scale 3-7-1, and the second scale 3-7-1 divides a circle of the first scale column 3-7 into 50 parts; a second indicator needle 3-6, the second indicator needle 3-6 is fixedly connected to the upper surface of the first slider 3-3, the needle tip width of the second indicator needle 3-6 is smaller than the minimum scale of the second scale 3-7-1, and the needle tip of the second indicator needle 3-6 is located at the edge of the first slider 3-3 near the first scale column 3-7; the pitch of the second screw rod 3-4 is 0.5 mm; the second horizontal measuring mechanism 4 also includes: a second scale column 4-5, the second scale column 4-5 is fixedly connected to the end of the third screw rod 4-2 near the second horizontal direction scale 4-4, the second scale column 4-5 is coaxial with the third screw rod 4-2, and the side surface of the second scale column 4-5 near the second slider 4-3 is provided with a third scale 4-5-1, and the third scale 4-5-1 divides a circle of the second scale column 4-5 into 50 parts; a third indicator needle 4-6, the third indicator needle 4-6 is fixedly connected to the upper surface of the second slider 4-3, the needle tip width of the third indicator needle 4-6 is smaller than the minimum scale of the third scale 4-5-1, and the needle tip of the third indicator needle 4-6 is located at the edge of the second slider 4-3 near the second scale column 4-5; the pitch of the third screw rod 4-2 is 0.5mm.

[0091] Furthermore, it also includes: a controller 6, which can be a control component with peripheral circuits such as PLC, Arduino or Raspberry Pi; a display 7, which is electrically connected to the controller 6; a first laser rangefinder 2-8, which is arranged on the upper surface of the base 2-6, and the laser emitted by the first laser rangefinder 2-8 irradiates the lower surface of the lifting platform 2-4, and the laser emission direction of the first laser rangefinder 2-8 is parallel to the central axis of the first screw rod 2-1, and the first laser rangefinder 2-8 is electrically connected to the controller 6; a second laser rangefinder 3-8, which is 3-8 is arranged at the end of the first slide groove 3-2, the laser emission direction of the second laser rangefinder 3-8 is parallel to the first slide groove 3-2, the laser emitted by the second laser rangefinder 3-8 irradiates the surface of the first slider 3-3, and the second laser rangefinder 3-8 is electrically connected to the controller 6; the third laser rangefinder 4-7, the third laser rangefinder 4-7 is arranged at the end of the second slide groove 4-1, the laser emission direction of the third laser rangefinder 4-7 is parallel to the second slide groove 4-1, the laser emitted by the third laser rangefinder 4-7 irradiates the surface of the second slider 4-3, and the third laser rangefinder 4-7 is electrically connected to the controller 6. Here, the first laser rangefinder 2-8, the second laser rangefinder 3-8 and the third laser rangefinder 4-7 can adopt the laser rangefinder module of brand MyAntenna and model L.

[0092] Furthermore, it also includes: an angle measuring device, which is arranged between the scale cone 2-5 and the base 2-6, the angle measuring device is arranged between the first slider 3-3 and the first scale column 3-7, the angle measuring device is arranged between the second slider 4-3 and the second scale column 4-5, and the angle measuring device is electrically connected to the controller 6.

[0093] Furthermore, the angle measuring device includes: a first capacitance measuring module 5-5, the first capacitance measuring module 5-5 is electrically connected to the controller 6; a second capacitance measuring module 5-4, the second capacitance measuring module 5-4 is electrically connected to the controller 6; a first fixed capacitance plate 5-1, the first fixed capacitance plate 5-1 is made of metal, the first fixed capacitance plate 5-1 is a semicircular ring, and the first fixed capacitance plate 5-1 is electrically connected to the first capacitance measuring module 5-5; a rotating capacitance plate 5-3, the rotating capacitance plate 5-3 has the same shape as the first fixed capacitance plate 5-1, the rotating capacitance plate 5-3 is parallel to the first fixed capacitance plate 5-1, the rotating capacitance plate 5-3 is coaxial with the first fixed capacitance plate 5-1, and the rotating capacitance plate 5-3 is electrically connected to the first capacitance measuring module 5-5 , the rotating capacitor plate 5-3 is electrically connected to the second capacitance measuring module 5-4; the second fixed capacitor plate 5-2, the second fixed capacitor plate 5-2 is a 1 / 4 circular ring, the inner diameter and outer diameter of the second fixed capacitor plate 5-2 are the same as the first fixed capacitor plate 5-1, the second fixed capacitor plate 5-2 is parallel to the rotating capacitor plate 5-3, the second fixed capacitor plate 5-2 is coaxial with the rotating capacitor plate 5-3, the reference plane is parallel to the first fixed capacitor plate 5-1, the projections of the first fixed capacitor plate 5-1 and the second fixed capacitor plate 5-2 on the reference plane are a complete circular ring, the spacing between the second fixed capacitor plate 5-2 and the rotating capacitor plate 5-3 is not equal to the spacing between the first fixed capacitor plate 5-1 and the rotating capacitor plate 5-3, and the second fixed capacitor plate 5-2 is electrically connected to the second capacitance measuring module 5-4. An angle measuring device is installed between the scale cone 2-5 and the base 2-6, wherein the first fixed capacitor plate 5-1 is arranged in the base 2-6, the first fixed capacitor plate 5-1 is perpendicular to the first screw rod 2-1, the inner diameter of the first fixed capacitor plate 5-1 is greater than the outer diameter of the first screw rod 2-1, the outer diameter of the first fixed capacitor plate 5-1 is smaller than the diameter of the bottom surface of the scale cone 2-5, the second fixed capacitor plate 5-2 is arranged in the base 2-6, the second fixed capacitor plate 5-2 is perpendicular to the first screw rod 2-1, and the rotating capacitor plate 5-3 is arranged in the scale cone 2-5. An angle measuring device is installed between the first scale column 3-7 and the first slider 3-3, the first fixed capacitor plate 5-1 is arranged in the first slider 3-3, the first fixed capacitor plate 5-1 is perpendicular to the second screw rod 3-4, the inner diameter of the first fixed capacitor plate 5-1 is larger than the first rotary hole 3-3-1, the outer diameter of the first fixed capacitor plate 5-1 is smaller than the diameter of the first scale column 3-7, the second fixed capacitor plate 5-2 is arranged in the first movable block, the second fixed capacitor plate 5-2 is perpendicular to the second screw rod 3-4, and the rotating capacitor plate 5-3 is arranged in the first scale column 3-7.An angle measuring device is installed between the second scale column 4-5 and the second slider 4-3, the first fixed capacitor plate 5-1 is arranged in the second slider 4-3, the first fixed capacitor plate 5-1 is perpendicular to the third screw rod 4-2, the inner diameter of the first fixed capacitor plate 5-1 is larger than the second rotary hole 4-3-1, the outer diameter of the first fixed capacitor plate 5-1 is smaller than the diameter of the second scale column 4-5, the second fixed capacitor plate 5-2 is arranged in the second movable block, the second fixed capacitor plate 5-2 is perpendicular to the third screw rod 4-2, and the rotating capacitor plate 5-3 is arranged in the second scale column 4-5.

[0094] A method for using the GNSS measurement accuracy detector, the method comprising:

[0095] Height change value ΔH measurement: The first laser rangefinder 2-8 measures the initial position of the lifting platform 2-4 and sends it to the controller 6, which takes the initial height head value A0 above millimeters, and the angle measuring device measures the angle θ0 of the scale cone 2-5 and sends it to the controller 6, which calculates the initial height tail value Then the initial accurate value of the height H0=A0+B0 is obtained; the first laser rangefinder 2-8 measures the end position of the lifting platform 2-4 and sends it to the controller 6, the controller 6 takes the height end head value A1 above millimeters, the angle measuring device measures the angle θ1 of the scale cone 2-5 and sends it to the controller 6, and the controller 6 calculates the height end tail value Then the accurate value of the height endpoint is obtained H1=A1+B1; the controller 6 calculates ΔH=H1-H0;

[0096] Measurement of the first horizontal direction change value ΔX: The second laser rangefinder 3-8 measures the initial position of the first slider 3-3 and sends it to the controller 6, which takes the first horizontal direction initial head value C0 above millimeters, and the angle measuring device measures the angle φ0 of the first scale column 3-7 and sends it to the controller 6, which calculates the first horizontal direction initial tail value Then the initial accurate value X0=C0+D0 of the first horizontal direction is obtained; the second laser rangefinder 3-8 measures the end position of the first slider 3-3 and sends it to the controller 6, the controller 6 takes the lifting end head value C1 above millimeters, the angle measuring device measures the angle φ1 of the first scale column 3-7 and sends it to the controller 6, the controller 6 calculates the end tail value of the first horizontal direction Then the accurate value of the first horizontal end point X1=C1+D1 is obtained; the controller 6 calculates ΔX=X1-X0;

[0097] Measurement of the second horizontal direction change value ΔY: The third laser rangefinder 4-7 measures the initial position of the second slider 4-3 and sends it to the controller 6. The controller 6 takes the initial head value E0 above millimeters. The angle measuring device measures the angle ψ0 of the first scale column 3-7 and sends it to the controller 6. The controller 6 calculates the initial tail value in the second horizontal direction Then, the initial accurate value Y0 of the lifting measurement is obtained: Y0 = E0 + F0. The third laser rangefinder 4-7 measures the end position of the second slider 4-3 and sends it to the controller 6. The controller 6 takes the end head value E1 above millimeters. The angle measuring device measures the angle ψ1 of the first scale column 3-7 and sends it to the controller 6. The controller 6 calculates the end tail value in the second horizontal direction Then, the accurate value Y1 in the second horizontal direction is obtained: Y1 = E1 + F1. The controller 6 calculates ΔY = Y1 - Y0.

[0098] Furthermore, the angle measurement method of the angle measuring device is as follows: The first capacitance measurement module 5-5 reads the capacitance value C1 between the first fixed capacitor plate 5-1 and the rotating capacitor plate 5-3 and sends it to the controller 6, and calculates the included angle ω between the chord of the rotating capacitor plate 5-3 and the chord of the first fixed capacitor plate 5-1, ω = 180 * (C1 / C1max), where C1max is the maximum capacitance value between the first fixed capacitor plate 5-1 and the rotating capacitor plate 5-3, C2max is the maximum capacitance value between the second fixed capacitor plate 5-2 and the rotating capacitor plate 5-3. The rotation angle β of the rotating capacitor plate 5-3 refers to the angle at which the rotating capacitor plate 5-3 rotates around its own rotation axis starting from the chord of the first fixed capacitor plate 5-1. The second capacitance measurement module 5-4 reads the capacitance value C2 between the second fixed capacitor plate 5-2 and the rotating capacitor plate 5-3 and sends it to the controller 6. The controller 6 judges that if C2 = 0 and C1 = C1max, then the rotation angle β of the rotating capacitor plate 5-3 is ω; the controller 6 judges that if C2 > 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate 5-3 is ω; the controller 6 judges that if C2 = C2max and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate 5-3 is ω; the controller 6 judges that if C2 > 0 and C1 = 0, then the rotation angle β of the rotating capacitor plate 5-3 is ω; the controller 6 judges that if C2 > 0 and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate 5-3 is ω + 180°; the controller 6 judges that if C2 = 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate 5-3 is ω + 180°.

[0099] The advantages of the present invention are

[0100] 1) The present invention changes and measures the height of the GNSS module 1 through the lifting measurement mechanism 2, changes and measures the position of the GNSS module 1 in the first horizontal direction through the first horizontal measurement mechanism 3, and changes and measures the position of the GNSS module 1 in the second horizontal direction through the second horizontal measurement mechanism 4, so that the position change of the GNSS module 1 does not require a support block, but is integrated into an overall structure, making the device more portable. At the same time, the change in the position of the GNSS module 1 is decomposed into three dimensions, which correspond to the three dimensions measured by the GNSS module 1, and the measurement error of each dimension can be intuitively displayed. Finally, due to the synchronization of the position change and the measurement, the demonstration process time is shortened;

[0101] 2) The present invention defines the position of the lifting platform 2-4 in the horizontal plane by the first screw rod 2-1 and the vertical ruler 2-2, and changes the vertical position of the lifting platform 2-4 by rotating the first screw rod 2-1 in the first screw hole 2-4-1, and measures the position of the lifting platform 2-4 by the vertical ruler 2-2, thereby realizing the position adjustment and measurement of the GNSS module 1 in the vertical direction;

[0102] 3) The present invention sets the pitch of the first screw rod 2-1 to 0.5 mm, arranges a graduated cone 2-5 on the first screw rod 2-1, and arranges a first indicator needle 2-7 on the upper surface of the base 2-6, so that the relative motion between the first screw rod 2-1 and the lifting platform 2-4 is amplified, and by combining with the vertical ruler 2-2, the relative position change measurement result between the lifting platform 2-4 and the first screw rod 2-1 is accurate to 0.01 mm, so that the device can demonstrate the measurement error of GNSS with an accuracy of 0.01 mm in the vertical position change;

[0103] 4) The present invention changes the position of the GNSS module 1 in the first horizontal direction by rotating the second screw rod 3-4 in the second screw hole 3-1-1, and changes the position of the GNSS module 1 in the second horizontal direction by rotating the third screw rod 4-2 in the third screw hole 3-1-2. The second screw rod and the third screw rod cooperate with each other so that the Z axis of the GNSS module 1 on the horizontal moving block 3-1 will not tilt, and then the position changes of the first slider 3-3 and the second slider 4-3 are obtained by changing the first horizontal direction scale 3-5 and the second horizontal direction scale 4-4;

[0104] 5) The present invention sets the pitch of the second screw rod 3-4 to 0.5 mm, arranges a first scale column 3-7 on the second screw rod 3-4, and arranges a second indicator needle 3-6 on the upper surface of the first slider 3-3, so that the relative motion between the second screw rod 3-4 and the first movable block is amplified, and by combining with the first horizontal direction scale 3-5, the relative position change measurement result of the first movable block and the second screw rod 3-4 is accurately measured to 0.01 mm, so that the device can demonstrate the measurement of GNSS with an accuracy of 0.01 mm in the first horizontal direction position change. Error; by setting the pitch of the third screw rod 4-2 to 0.5mm, and arranging the second scale column 4-5 on the third screw rod 4-2, and arranging the third indicator needle 4-6 on the upper surface of the second slider 4-3, the relative movement between the third screw rod 4-2 and the second movable block is amplified, and by combining with the second horizontal direction scale 4-4, the relative position change measurement result of the second movable block and the third screw rod 4-2 is accurately measured to 0.01mm, so that the device can demonstrate the measurement error of GNSS under the accuracy of 0.01mm position change in the second horizontal direction;

[0105] 6) The present invention measures the distance value of the lifting platform 2-4 with millimeter accuracy through the first laser rangefinder 2-8, measures the distance value of the first slider 3-3 with millimeter accuracy through the second laser rangefinder 3-8, measures the distance value of the third slider with millimeter accuracy through the third laser rangefinder 4-7, and displays them through the display 7, so that the position change of the GNSS module 1 in the first horizontal direction and the second horizontal direction can be quickly and intuitively displayed, the measurement speed is faster, and the display is more intuitive;

[0106] 7) Since the measurement accuracy of the laser rangefinder can only reach 1mm, the measurement accuracy is not enough. The present invention first converts the up and down movement distance of the lifting platform 2-4 into the angle change of the scale cone 2-5 relative to the first indicator needle 2-7 through the scale cone 2-5, and the first scale column 3-7 converts the movement distance of the first movable block in the first horizontal direction into the angle change of the first scale column 3-7 relative to the second indicator needle 3-6. The second scale column 4-5 converts the movement distance of the second movable block in the first horizontal direction into the angle change of the second scale column 4-5 relative to the third indicator needle 4-6. The angle change measured by the angle measuring device, the measurement values ​​of the first laser rangefinder 2-8, the second laser rangefinder 3-8 and the third laser rangefinder 4-7 are used to calculate the position change of the lifting platform 2-4 in the vertical direction, and the position of the first movable block in the first horizontal direction is calculated. The position change in the horizontal direction is calculated to calculate the position change of the second movable block in the second horizontal direction, with higher measurement accuracy and faster measurement speed; 8) The present invention obtains the angle between the chord of the rotating capacitor plate 5-3 and the chord of the first fixed capacitor plate 5-1 by changing the capacitance value between the rotating capacitor plate 5-3 and the first fixed capacitor plate 5-1, and then judges the rotation angle β of the rotating capacitor plate 5-3 in combination with the capacitance value between the rotating capacitor plate 5-3 and the second fixed capacitor plate 5-2, so that the controller 6 calculates the position change of the lifting platform 2-4 in the vertical direction, the position change of the first movable block in the first horizontal direction, and the position change of the second movable block in the second horizontal direction according to β combined with the measurement values ​​of the first laser rangefinder 2-8, the second laser rangefinder 3-8 and the third laser rangefinder 4-7, with higher measurement accuracy and faster measurement speed;

[0107] 9) The present invention measures the starting point and end point of the height of the lifting platform 2-4 by the first laser rangefinder 2-8 to obtain the head value, and obtains the tail value by measuring the angle of the starting point and end point of the scale cone 2-5 by the angle measuring device, and combines the head value and the tail value to obtain the accurate height change of the lifting platform 2-4; measures the starting point and end point of the first movable block in the first horizontal direction by the second laser rangefinder 3-8 to obtain the head value, and obtains the tail value by measuring the angle of the starting point and end point of the scale cone 2-5 by the angle measuring device, and combines the head value and the tail value to obtain the accurate distance change of the first movable block in the first horizontal direction; measures the starting point and end point of the second movable block in the second horizontal direction by the third laser rangefinder 4-7 to obtain the head value, and obtains the tail value by measuring the angle of the starting point and end point of the scale cone 2-5 by the angle measuring device, and combines the head value and the tail value to obtain the accurate distance change of the second movable block in the second horizontal direction; compared with the prior art which only uses a single laser

[0108] The rangefinder measures distance changes more accurately;

[0109] 10) The present invention first obtains the angle between the chord of the rotating capacitor plate 5-3 and the chord of the first fixed capacitor plate 5-1 by the change of the capacitance value between the rotating capacitor plate 5-3 and the first fixed capacitor plate 5-1, and then determines the rotation angle β of the rotating capacitor plate 5-3 in combination with the capacitance value between the rotating capacitor plate 5-3 and the second fixed capacitor plate 5-2, so that the controller 6 calculates the position change of the lifting platform 2-4 in the vertical direction, the position change of the first movable block in the first horizontal direction, and the position change of the second movable block in the second horizontal direction according to β combined with the measurement values ​​of the first laser rangefinder 2-8, the second laser rangefinder 3-8 and the third laser rangefinder 4-7. Compared with the prior art that measures the angle only by the capacitance value between the two capacitor plates, the angle range measured by the prior art is 0 to 180°, while the angle range measured by the present invention is 0 to 360°, which can realize the measurement of the angle of the rotating capacitor plate 5-3 rotating around its own rotation axis with the chord of the first fixed capacitor plate 5-1 as the starting point, and the measurement range is wider.

[0110] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A method for using a GNSS measurement accuracy detector, characterized in that: The usage method includes: Height change value ΔH measurement: the first laser rangefinder (2-8) measures the initial position of the lifting platform (2-4) and sends it to the controller (6), the controller (6) takes the initial height head value A0 above millimeters, the angle measuring device measures the angle θ0 of the scale cone (2-5) and sends it to the controller (6), and the controller (6) calculates the initial height tail value Then, the initial accurate value of the height H0=A0+B0 is obtained; the first laser rangefinder (2-8) measures the end position of the lifting platform (2-4) and sends it to the controller (6), the controller (6) takes the height end head value A1 above millimeters, the angle measuring device measures the angle θ1 of the scale cone (2-5) and sends it to the controller (6), and the controller (6) calculates the height end tail value Then the accurate value of the height endpoint is obtained, H1=A1+B1; the controller (6) calculates ΔH=H1-H0; Measurement of the first horizontal direction change value ΔX: The second laser rangefinder (3-8) measures the initial position of the first slider (3-3) and sends it to the controller (6). The controller (6) takes the first horizontal direction initial head value C0 above millimeters. The angle measuring device measures the angle φ0 of the first scale column (3-7) and sends it to the controller (6). The controller (6) calculates The initial tail value of the first horizontal direction Then, the initial accurate value X0=C0+D0 of the first horizontal direction is obtained; the second laser rangefinder (3-8) measures the end position of the first slider (3-3) and sends it to the controller (6); the controller (6) takes the lifting end head value C1 above millimeters; the angle measuring device measures the angle φ1 of the first scale column (3-7) and sends it to the controller (6); the controller (6) calculates the end tail value of the first horizontal direction Then the accurate value of the first horizontal end point X1=C1+D1 is obtained; the controller (6) calculates ΔX=X1-X0; Measurement of the second horizontal direction change value ΔY: the third laser rangefinder (4-7) measures the initial position of the second slider (4-3) and sends it to the controller (6), the controller (6) takes the second horizontal direction initial head value E0 above millimeters, the angle measuring device measures the angle ψ0 of the first scale column (3-7) and sends it to the controller (6), and the controller (6) calculates the second horizontal direction initial tail value Then, the initial accurate value of the measured lifting is obtained, Y0=E0+F0; the third laser rangefinder (4-7) measures the end position of the second slider (4-3) and sends it to the controller (6); the controller (6) takes the lifting end head value E1 above millimeters; the angle measuring device measures the angle ψ1 of the first scale column (3-7) and sends it to the controller (6); the controller (6) calculates the second horizontal end tail value Then the accurate value of the second horizontal end point Y1=E1+F1 is obtained; the controller (6) calculates ΔY=Y1-Y0; The angle measuring method of the angle measuring device is: The first capacitance measurement module (5-5) reads the capacitance value C1 between the first fixed capacitor plate (5-1) and the rotating capacitor plate (5-3) and sends it to the controller (6), calculates the included angle ω between the chord of the rotating capacitor plate (5-3) and the chord of the first fixed capacitor plate (5-1), ω = 180*(C1 / C1max), where C1max is the maximum capacitance value between the first fixed capacitor plate (5-1) and the rotating capacitor plate (5-3), C2max is the maximum capacitance value between the second fixed capacitor plate (5-2) and the rotating capacitor plate (5-3). The rotation angle β of the rotating capacitor plate (5-3) refers to the angle that the rotating capacitor plate (5-3) rotates around its own axis starting from the chord of the first fixed capacitor plate (5-1). The second capacitance measurement module (5-4) reads the capacitance value C2 between the second fixed capacitor plate (5-2) and the rotating capacitor plate (5-3) and sends it to the controller (6). The controller (6) judges that if C2 = 0 and C1 = C1max, then the rotation angle β of the rotating capacitor plate (5-3) is ω; the controller (6) judges that if C2 > 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate (5-3) is ω; the controller (6) judges that if C2 = C2max and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate (5-3) is ω; the controller (6) judges that if C2 > 0 and C1 = 0, then the rotation angle β of the rotating capacitor plate (5-3) is ω; the controller (6) judges that if C2 > 0 and C1 < C1max / 2, then the rotation angle β of the rotating capacitor plate (5-3) is ω + 180°; the controller (6) judges that if C2 = 0 and C1 ≥ C1max / 2, then the rotation angle β of the rotating capacitor plate (5-3) is ω + 180°; The GNSS measurement accuracy detector includes: GNSS module (1); Lifting measurement mechanism (2), the GNSS module (1) is connected to the lifting measurement mechanism (2), and the lifting measurement mechanism (2) is used to measure the lifting height of the GNSS module (1); First horizontal measurement mechanism (3), the GNSS module (1) is connected to the lifting measurement mechanism (2) through the first horizontal measurement mechanism (3), and the first horizontal measurement mechanism (3) is used to measure the displacement of the GNSS module (1) in the first horizontal direction; Second horizontal measurement mechanism (4), the GNSS module (1) is connected to the second horizontal measurement mechanism (4), and the second horizontal measurement mechanism (4) is used to measure the displacement of the GNSS module (1) in the second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction; The lifting measurement mechanism (2) includes: Base (2-6); A first screw rod (2-1), one end of the first screw rod (2-1) being rotatably connected to the upper surface of the base (2-6) via a bearing, and the first screw rod (2-1) is parallel to the upper surface of the base (2-6); A first knob (2-3), the first knob (2-3) is cylindrical, the diameter of the first knob (2-3) is larger than the first screw rod (2-1), the first knob (2-3) is coaxial with the first screw rod (2-1), and the first knob (2-3) is fixedly connected to the upper end of the first screw rod (2-1); A vertical ruler (2-2), the lower end of the vertical ruler (2-2) is fixedly connected to the upper surface of the base (2-6), and the vertical ruler (2-2) is parallel to the first screw rod (2-1); A lifting platform (2-4), wherein the GNSS module (1) is connected to the lifting platform (2-4), the lifting platform (2-4) is rectangular, and two corners of the lifting platform (2-4) are respectively provided with a first screw hole (2-4-1) and a measuring hole (2-4-2), the first screw hole (2-4-1) matches the first screw rod (2-1), the first screw rod (2-1) is threadedly connected to the first screw hole (2-4-1), the measuring hole (2-4-2) matches the vertical ruler (2-2), and the vertical ruler (2-2) is slidably connected to the measuring hole (2-4-2); The first level measuring mechanism (3) comprises: A horizontal moving block (3-1), wherein the GNSS module (1) is fixedly connected to the upper surface of the horizontal moving block (3-1), and a second screw hole (3-1-1) and a third screw hole (3-1-2) are provided on the horizontal moving block (3-1), the second screw hole (3-1-1) and the third screw hole (3-1-2) are perpendicular to each other and do not intersect, the central axis of the second screw hole (3-1-1) is perpendicular to the Z axis of the GNSS module (1), and the central axis of the third screw hole (3-1-2) is perpendicular to the Z axis of the GNSS module (1); A first slide groove (3-2), wherein the first slide groove (3-2) comprises two first slide grooves (3-2), the two first slide grooves (3-2) are arranged on opposite side edges of the lifting platform (2-4), the two first slide grooves (3-2) are parallel to each other, and a first horizontal scale (3-5) along the length direction of the first slide groove (3-2) is provided on a side surface of one of the first slide grooves (3-2); A first slider (3-3), the first slider (3-3) comprising two first sliders (3-3), the first sliders (3-3) matching the first slide grooves (3-2), the two first sliders (3-3) respectively slidably connected in the two first slide grooves (3-2), the first slider (3-3) being provided with a first rotating hole (3-3-1) perpendicular to the first slide groove (3-2), a coaxial bearing being fixedly connected in the first rotating hole (3-3-1), the central axis of the first rotating hole (3-3-1) and the central axis of the second screw hole (3-1-1) being located on the same plane perpendicular to the central axis of the first screw rod (2-1); A second screw rod (3-4), both ends of which are fixedly connected to the first screw holes (3-3-1) of the two first sliders (3-3) through bearings, the second screw rod (3-4) matches the second screw hole (3-1-1), and the second screw rod (3-4) is threadedly connected to the second screw hole (3-1-1); The second level measuring mechanism (4) comprises: A second slide groove (4-1), wherein the second slide groove (4-1) comprises two second slide grooves (4-1), the two second slide grooves (4-1) are opened on two opposite side edges of the lifting platform (2-4), the second slide groove (4-1) is perpendicular to the first slide groove (3-2), the two second slide grooves (4-1) are parallel to each other, and a side surface of one of the second slide grooves (4-1) is provided with a second horizontal scale (4-4) along the length direction of the second slide groove (4-1); A second slider (4-3), the second slider (4-3) includes two sliders, the second slider (4-3) matches the second slide groove (4-1), the two second sliders (4-3) are slidably connected in the two second slide grooves (4-1), the second slider (4-3) is provided with a second rotating hole (4-3-1) perpendicular to the second slide groove (4-1), a coaxial bearing is fixedly connected in the second rotating hole (4-3-1), and the central axis of the second rotating hole (4-3-1) and the central axis of the third screw hole (3-1-2) are located on the same plane perpendicular to the central axis of the first screw rod (2-1); A third screw rod (4-2), both ends of the third screw rod (4-2) being fixedly connected to the second screw holes (4-3-1) of the two second sliders (4-3) through bearings, the third screw rod (4-2) matching the third screw hole (3-1-2), and the third screw rod (4-2) being threadedly connected to the third screw hole (3-1-2); The first level measuring mechanism (3) further comprises: A first scale column (3-7), the first scale column (3-7) being fixedly connected to an end of the second screw rod (3-4) close to the first horizontal scale (3-5), the first scale column (3-7) being coaxial with the second screw rod (3-4), a second scale (3-7-1) being provided on a side surface of the first scale column (3-7) close to the first slider (3-3), the second scale (3-7-1) dividing one circle of the first scale column (3-7) into 50 equal parts; A second indicator needle (3-6), the second indicator needle (3-6) is fixedly connected to the upper surface of the first slider (3-3), the needle tip width of the second indicator needle (3-6) is smaller than the minimum scale of the second scale (3-7-1), and the needle tip of the second indicator needle (3-6) is located at the edge of the first slider (3-3) close to the first scale column (3-7); The pitch of the second screw rod (3-4) is 0.5 mm; The second level measuring mechanism (4) further comprises: A second scale column (4-5), the second scale column (4-5) is fixedly connected to the end of the third screw rod (4-2) close to the second horizontal scale (4-4), the second scale column (4-5) is coaxial with the third screw rod (4-2), and a third scale (4-5-1) is provided on the side surface of the second scale column (4-5) close to the second slider (4-3), and the third scale (4-5-1) divides one circle of the second scale column (4-5) into 50 equal parts; A third indicator needle (4-6), the third indicator needle (4-6) being fixedly connected to the upper surface of the second slider (4-3), the needle tip width of the third indicator needle (4-6) being smaller than the minimum scale of the third scale (4-5-1), and the needle tip of the third indicator needle (4-6) being located at the edge of the second slider (4-3) close to the second scale column (4-5); The pitch of the third screw rod (4-2) is 0.5 mm; Also includes: Controller (6); A display (7), wherein the display (7) is electrically connected to the controller (6); A first laser rangefinder (2-8), the first laser rangefinder (2-8) being arranged on the upper surface of the base (2-6), the laser emitted by the first laser rangefinder (2-8) irradiating the lower surface of the lifting platform (2-4), the laser emission direction of the first laser rangefinder (2-8) being parallel to the central axis of the first screw rod (2-1), and the first laser rangefinder (2-8) being electrically connected to the controller (6); a second laser rangefinder (3-8), the second laser rangefinder (3-8) being arranged at the end of the first slide groove (3-2), the laser emission direction of the second laser rangefinder (3-8) being parallel to the first slide groove (3-2), the laser emitted by the second laser rangefinder (3-8) irradiating the surface of the first slider (3-3), and the second laser rangefinder (3-8) being electrically connected to the controller (6); a third laser rangefinder (4-7), the third laser rangefinder (4-7) being arranged at the end of the second slide groove (4-1), the laser emission direction of the third laser rangefinder (4-7) being parallel to the second slide groove (4-1), the laser emitted by the third laser rangefinder (4-7) irradiating the surface of the second slider (4-3), and the third laser rangefinder (4-7) being electrically connected to the controller (6); Also includes: An angle measuring device, the angle measuring device is arranged between the scale cone (2-5) and the base (2-6), the angle measuring device is arranged between the first slider (3-3) and the first scale column (3-7), the angle measuring device is arranged between the second slider (4-3) and the second scale column (4-5), and the angle measuring device is electrically connected to the controller (6); The angle measuring device comprises: A first capacitance measuring module (5-5), wherein the first capacitance measuring module (5-5) is electrically connected to a controller (6); A second capacitance measuring module (5-4), the second capacitance measuring module (5-4) being electrically connected to the controller (6); A first fixed capacitor plate (5-1), the first fixed capacitor plate (5-1) is made of metal, the first fixed capacitor plate (5-1) is in a semicircular ring shape, and the first fixed capacitor plate (5-1) is electrically connected to the first capacitance measurement module (5-5); A rotating capacitor plate (5-3), wherein the rotating capacitor plate (5-3) has the same shape as the first fixed capacitor plate (5-1), the rotating capacitor plate (5-3) is parallel to the first fixed capacitor plate (5-1), the rotating capacitor plate (5-3) is coaxial with the first fixed capacitor plate (5-1), the rotating capacitor plate (5-3) is electrically connected to the first capacitance measurement module (5-5), and the rotating capacitor plate (5-3) is electrically connected to the second capacitance measurement module (5-4); A second fixed capacitor plate (5-2), wherein the second fixed capacitor plate (5-2) is in the shape of a quarter of a circle, the inner diameter and the outer diameter of the second fixed capacitor plate (5-2) are the same as those of the first fixed capacitor plate (5-1), the second fixed capacitor plate (5-2) is parallel to the rotating capacitor plate (5-3), the second fixed capacitor plate (5-2) is coaxial with the rotating capacitor plate (5-3), the reference plane is parallel to the first fixed capacitor plate (5-1), the projections of the first fixed capacitor plate (5-1) and the second fixed capacitor plate (5-2) on the reference plane are a complete circle, the spacing between the second fixed capacitor plate (5-2) and the rotating capacitor plate (5-3) is not equal to the spacing between the first fixed capacitor plate (5-1) and the rotating capacitor plate (5-3), and the second fixed capacitor plate (5-2) is electrically connected to the second capacitance measurement module (5-4).

2. The method for using the GNSS measurement accuracy detector according to claim 1, characterized in that: The lifting and measuring mechanism (2) further comprises: A graduated cone (2-5), the graduated cone (2-5) being fixedly connected to the lower part of the first screw rod (2-1), the bottom surface diameter of the graduated cone (2-5) being larger than the diameter of the first screw rod (2-1), the graduated cone (2-5) being coaxial with the first screw rod (2-1), the lower surface of the graduated cone (2-5) being attached to the upper surface of the base (2-6), the side surface of the graduated cone (2-5) close to the base (2-6) being provided with a first scale (2-5-1), and the first scale (2-5-1) dividing one circle of the graduated cone (2-5) into 50 equal parts; A first indicator needle (2-7), the first indicator needle (2-7) being fixedly connected to the upper surface of the base (2-6), the needle tip width of the first indicator needle (2-7) being smaller than the minimum scale of the first scale (2-5-1), and the needle tip of the first indicator needle (2-7) being located at the edge of the lower surface of the scale cone (2-5); The pitch of the first screw rod (2-1) is 0.5 mm.

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