A measuring device for land area surveying and mapping and a method of using the same

Abstract

The present invention relates to the field of land area surveying and mapping, and specifically to a measuring device and a method for using land area surveying and mapping. It includes a frame, a timing module and a central controller; the frame is provided with a front wheel assembly, a rear wheel assembly, a power device, a gyroscope and a battery, the rear wheel assembly includes a rear wheel, the output end of the power device is connected to the rear wheel transmission, and the battery is electrically connected to the power device and the gyroscope; the timing module times the total driving time of the rear wheel, and generates a timing signal every preset unit time; the central controller is connected to the power device control, and is connected to the gyroscope and the timing module for communication, receives the inclination angle data of the frame relative to the horizontal plane detected by the gyroscope, receives the timing signal generated by the timing module and the statistical total driving time data of the rear wheel, and calculates the total horizontal movement distance of the rear wheel when it is straight. The present invention can improve the surveying and mapping accuracy by calculating the horizontal distance during movement in segments and summarizing them.

Description

Technical Field

[0001] The present invention relates to the field of land area surveying and mapping, and in particular to a measuring device and a use method for land area surveying and mapping. Background Art

[0002] When surveyors measure and map the land area, they usually place measuring poles along the side length of the land to be measured, measure the length of the side by stretching the measuring ruler, and calculate the area of ​​the land through continuous measurement and reading by the staff. The measurement process is cumbersome and the accuracy is not high.

[0003] Chinese patent publication number CN117367358B discloses a land area mapping measurement device and method, which can continuously measure the land surface area and map the area graph at the same time by linking the drawing device and the adaptation device, so that the work efficiency is greatly improved.

[0004] However, the above technical solution has the following shortcomings:

[0005] When there are earth slopes or earth pits on the land, the traveling wheels roll on the earth slopes and earth pits, and the linkage drawing device cannot achieve proportional drawing, resulting in a large difference from the actual land measurement size. Summary of the invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and to propose a measuring device and a method for use in land area surveying and mapping, which can improve the surveying and mapping accuracy by calculating the horizontal distance during movement in segments and summarizing them.

[0007] On the one hand, the present invention provides a measuring device for land area surveying and mapping, comprising a frame, a timing module and a central controller; the frame is provided with a front wheel assembly, a rear wheel assembly, a power device, a gyroscope and a battery, the rear wheel assembly comprises a rear wheel, the output end of the power device is transmission-connected to the rear wheel, and the battery is electrically connected to the power device and the gyroscope; the timing module counts the total driving time of the rear wheel and generates a timing signal every preset unit time; the central controller is control-connected to the power device, and is communication-connected to the gyroscope and the timing module, receives the inclination angle data of the frame relative to the horizontal plane detected by the gyroscope, receives the timing signal generated by the timing module and the statistical total driving time data of the rear wheel, and calculates the total horizontal movement distance of the rear wheel when it is moving straight, and the calculation method is as follows:

[0008] Linear speed of rear wheel :

[0009]

[0010] in, is the rear wheel diameter, is the rear wheel speed, which is equal to the speed at the output end of the power unit;

[0011] Rear wheel per unit time Driving distance within :

[0012]

[0013] The rear wheel Horizontal movement distance per unit time :

[0014]

[0015] in, The gyroscope measured The inclination angle of the frame relative to the horizontal plane at the end of the unit time, ;

[0016] Count the sum of the horizontal movement distances of the rear wheels in all unit times to get the statistical distance :

[0017]

[0018] The timing module counts the total time taken by the rear wheel from the starting point to the end point of the straight line After the timing module generates the last timing signal, if the remaining time does not reach one unit time, calculate the compensation distance traveled by the rear wheel within the remaining time. :

[0019]

[0020] in, ;

[0021] From the above formula we get:

[0022]

[0023] in, is the total horizontal distance moved by the rear wheel when it moves straight. =1, 2, 3, ……….

[0024] Preferably, the front wheel assembly includes a mounting shaft rotatably arranged on the frame, a front wheel frame arranged at the bottom of the mounting shaft and a front wheel rotatably arranged on the front wheel frame, and the front wheel and the mounting shaft are staggered. The rear wheel assembly also includes a rear wheel frame arranged on the frame and a rotating shaft rotatably arranged on the rear wheel frame, and the rear wheel is coaxially mounted on the rotating shaft. A support frame is arranged on the frame, and two handles are symmetrically arranged on the top of the support frame.

[0025] Preferably, it also includes a deflection warning mechanism, which reminds the surveyor to correct the driving direction when the front wheel assembly deviates from the straight-ahead direction. The deflection warning mechanism includes a connecting rod arranged on the mounting shaft and distributed in the same direction as the front wheel, an incomplete gear arranged at the outer end of the connecting rod and distributed around the mounting shaft, an intermediate gear rotatably arranged on the frame and meshing with the incomplete gear, a swing shaft rotatably arranged on the frame, a driven gear arranged on the swing shaft and meshing with the intermediate gear, a swing frame arranged on the swing shaft, a pointer arranged on the top of the swing frame and eccentrically distributed with the swing shaft, a disk frame arranged on the support frame, and a dial arranged on the disk frame, wherein the top surface of the dial has scale lines distributed around the swing shaft.

[0026] Preferably, the diameters of the incomplete gear, the intermediate gear and the driven gear decrease in sequence.

[0027] Preferably, two groups of alarm components are symmetrically arranged on the frame along the width direction of the swing axis, and the alarm components include a bracket arranged on the frame, an arc rod distributed around the swing axis and slidably arranged on the bracket, a mounting plate and a limit platform respectively connected to both ends of the arc rod, a first spring sleeved on the outer circumference of the arc rod and connected to the mounting plate and the bracket at both ends respectively, a pressure sensor arranged on the mounting plate and a sound alarm arranged on the frame, a push plate capable of pushing the pressure sensor is connected to the bottom end of the swing frame, the pressure sensor is communicatively connected to the central controller, and the central controller is control-connected to the sound alarm.

[0028] Preferably, it also includes a liquid spray marking mechanism, which includes a turntable arranged on a rotating shaft, a connecting rod eccentrically arranged on the turntable, a connecting shaft connected to the outer end of the connecting rod, a sliding rod rotatably connected to the connecting shaft, a piston connected to the outer end of the sliding rod, a paint bucket and a tee pipe arranged on the frame, and a nozzle arranged on the tee pipe, the paint bucket has a through hole on the top, the tee pipe includes a vertical tube part and a horizontal tube part, the vertical tube part is connected to the upper part of the horizontal tube part, the top of the vertical tube part is connected to the bottom end of the paint bucket, the piston sliding seal is arranged on the inner side of the horizontal tube part, the sliding rod passes through one lateral end of the horizontal tube part, the nozzle is connected to the other lateral end of the horizontal tube part and has a liquid spray port distributed downward.

[0029] Preferably, a guide frame is provided at one end of the transverse tube portion of the tee pipe, a filter screen is provided on the guide frame, and the slide rod is slidably provided on the guide frame.

[0030] Preferably, two groups of stabilizing components are symmetrically arranged on the frame along the width direction, and the stabilizing components include a connecting frame arranged on the side of the frame, a sliding column vertically slidably arranged on the connecting frame, a top plate arranged on the top end of the sliding column, a side wheel frame arranged at the bottom end of the sliding column, a second spring which is sleeved on the outer periphery of the sliding column and connected to the connecting frame and the side wheel frame at both ends respectively, and a side wheel rotatably arranged on the side wheel frame.

[0031] In another aspect, the present invention provides a method for using the above-mentioned land area surveying device, the method comprising the following steps:

[0032] S1, move the rear wheel to the starting point of the straight measurement;

[0033] S2, the power device drives the rear wheel to rotate, the timing module generates a timing signal every preset unit time, and transmits the timing signal to the central controller, and the central controller receives the inclination angle data of the frame relative to the horizontal plane detected by the gyroscope at this moment;

[0034] S3, preset a unit time, in each unit time, the rear wheel travel distance is fixed, calculate the product of the rear wheel travel distance in each unit time and the cosine value of the frame inclination angle, take the product as the horizontal movement distance of the rear wheel in the unit time, count the sum of the horizontal movement distances of the rear wheel in all unit times, and obtain the statistical distance;

[0035] S4. For the total driving time of the rear wheel, after the timing module generates the last timing signal, if the remaining time does not reach one unit time, the product of the remaining time and the rear wheel linear speed is used as the compensation distance;

[0036] S5. Add the statistical distance and the compensation distance to obtain the total horizontal movement distance of the rear wheel when the rear wheel is moving straight.

[0037] Compared with the prior art, the present invention has the following beneficial technical effects:

[0038] The present invention can improve the surveying accuracy by calculating the horizontal distance during movement in sections and summarizing them, and reduce the impact of soil slopes and soil pits on the measurement data. The distance traveled by the rear wheel in each unit time is fixed, and the distance traveled in each unit time corresponds to a horizontal movement distance. By counting the sum of the horizontal movement distances, and then calculating the rear wheel travel distance that is less than one unit time, that is, the compensation distance, the statistical distance and the compensation distance are added to obtain a higher-precision total horizontal movement distance of the rear wheel when it is moving straight. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0040] Figure 2 A partial structural cross-sectional view of an embodiment of the present invention;

[0041] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0042] Figure 4 for Figure 2 A magnified view of the structure at B in the middle;

[0043] Figure 5 This is a schematic diagram of the distribution of side wheels;

[0044] Figure 6 This is the control principle structure block diagram of the central controller;

[0045] Figure 7 Schematic diagram for analyzing the horizontal moving distance when driving uphill per unit time.

[0046] Figure numerals: 1, frame; 2, rear wheel; 201, rotating shaft; 3, rear wheel frame; 4, power device; 5, front wheel; 6, front wheel frame; 7, mounting shaft; 8, gyroscope; 9, timing module; 10, central controller; 11, display screen; 12, pressure sensor; 13, connecting rod; 14, incomplete gear; 15, intermediate gear; 16, driven gear; 17, swing shaft; 18, swing frame; 19, push plate; 20, mounting plate; 21, arc rod; 211, limit table; 22. Bracket; 23. First spring; 24. Mounting cover; 25. Pointer; 26. Dial; 27. Disc rack; 28. Turntable; 29. ​​Connecting rod; 30. Connecting shaft; 31. Sliding rod; 32. Piston; 33. Paint bucket; 34. Tee pipe; 35. Nozzle; 36. Guide frame; 37. Filter; 38. Support frame; 39. Handle; 40. Side wheel; 41. Side wheel rack; 42. Sliding column; 43. Top plate; 44. Connecting frame; 45. Second spring; 46. Counterweight. DETAILED DESCRIPTION

[0047] Embodiment 1, as Figure 1-Figure 7 As shown, a measuring device for land area surveying and mapping proposed in this embodiment includes a frame 1, a timing module 9 and a central controller 10.

[0048] The frame 1 is provided with a front wheel assembly, a rear wheel assembly, a power device 4, a gyroscope 8 and a battery. The front wheel assembly includes a mounting shaft 7 rotatably arranged on the frame 1, a front wheel frame 6 arranged at the bottom of the mounting shaft 7 and a front wheel 5 rotatably arranged on the front wheel frame 6, and the front wheel 5 and the mounting shaft 7 are staggered. The rear wheel assembly includes a rear wheel 2, a rear wheel frame 3 arranged on the frame 1 and a rotating shaft 201 rotatably arranged on the rear wheel frame 3, and the rear wheel 2 is coaxially mounted on the rotating shaft 201. The output end of the power device 4 is transmission-connected with the rear wheel 2, and the battery is electrically connected with the power device 4 and the gyroscope 8. The frame 1 is provided with a support frame 38, and two handles 39 are symmetrically arranged on the top of the support frame 38. A counterweight block 46 can be provided at the front end of the frame 1, and the surveyor grabs the handle 39 at the rear to keep the front wheel 5 and the rear wheel 2 in a state of being able to roll on the ground, prevent them from leaving the ground, and reduce the detection error of the gyroscope 8.

[0049] The timing module 9 times the total driving time of the rear wheel 2 and generates a timing signal every preset unit time. The preset unit time is very short, within 3 seconds. For example, if the preset unit time is 0.8 seconds, a timing signal is generated from 0 seconds to 0.8 seconds at the end of 0.8 seconds, and from 0.8 seconds to 1.6 seconds, a timing signal is generated at the end of 1.6 seconds, and so on.

[0050] The central controller 10 is connected to the power device 4, and is in communication with the gyroscope 8 and the timing module 9, receiving the inclination angle data of the frame 1 relative to the horizontal plane detected by the gyroscope 8, and receiving the timing signal generated by the timing module 9 and the total running time data of the rear wheel 2.

[0051] The method for using the above-mentioned land area surveying and mapping measuring device comprises the following steps S1-S5:

[0052] S1, move the rear wheel 2 to the starting point of the straight measurement;

[0053] S2, the power device 4 drives the rear wheel 2 to rotate, the timing module 9 generates a timing signal every preset unit time, and transmits the timing signal to the central controller 10, and the central controller 10 receives the inclination angle data of the frame 1 relative to the horizontal plane detected by the gyroscope 8 at this moment;

[0054] S3, preset a unit time, in each unit time, the travel distance of the rear wheel 2 is fixed, calculate the product of the travel distance of the rear wheel 2 and the cosine value of the inclination angle of the frame 1 in each unit time, take the product as the horizontal movement distance of the rear wheel 2 in the unit time, count the sum of the horizontal movement distances of the rear wheel 2 in all unit times, and obtain the statistical distance;

[0055] S4. For the total driving time of the rear wheel 2, after the timing module 9 generates the last timing signal, when the remaining time does not reach one unit time, the product of the remaining time and the linear speed of the rear wheel 2 is used as the compensation distance. The compensation distance is an approximate horizontal distance value. Because the remaining time is very short, less than one unit time, and the driving distance is very short, the error between the compensation distance and the actual horizontal distance is small;

[0056] S5. Add the statistical distance and the compensation distance to obtain the total horizontal movement distance of the rear wheel 2 when it moves straight, and measure the length of a side of the area to be measured.

[0057] By adjusting the orientation of the measuring device and looping through steps S1-S5, the lengths of the sides of the area to be measured within the closed-loop contour can be measured, thereby obtaining the land area of ​​the area to be measured.

[0058] The central controller 10 calculates the total horizontal movement distance of the rear wheel 2 when it is moving straight based on the rotation speed and diameter of the rear wheel 2, unit time data, the frame 1 inclination angle data and the total driving time data of the rear wheel 2. The central controller 10 can be communicatively connected to a display screen 11, and the display screen 11 is used to display the total horizontal movement distance, and the closed-loop data of the length of each side within the closed-loop range measured by the device is displayed to calculate the land area.

[0059] The method by which the central controller 10 calculates the total horizontal movement distance of the rear wheels 2 when they are moving straight is as follows:

[0060] Linear speed of rear wheel 2 when traveling :

[0061]

[0062] in, The unit is m / s, is the diameter of rear wheel 2, in meters, is the speed of the rear wheel 2, which is equal to the speed of the output end of the power device 4, and the unit of speed is r / s;

[0063] Rear wheel 2 per unit time Driving distance within , The unit is seconds. The unit is meter, The value is small and can be approximated as a straight line segment:

[0064]

[0065] Rear wheel 2 Horizontal movement distance per unit time , in meters:

[0066]

[0067] in, is the first The inclination angle of the frame 1 relative to the horizontal plane at the end of the unit time, ;

[0068] Count the sum of the horizontal movement distances of the rear wheel 2 in all unit times to get the statistical distance :

[0069]

[0070] The timing module 9 counts the total time taken by the rear wheel 2 from the starting point to the end point of the straight line , The unit is seconds. After the timing module 9 generates the last timing signal, if the remaining time does not reach one unit time, the compensation distance traveled by the rear wheel 2 in the remaining time is calculated. :

[0071]

[0072] in, , is the rounding down formula;

[0073] From the above formula we get:

[0074]

[0075] in, is the total horizontal distance moved by the rear wheel 2 when it moves straight, in meters. =1, 2, 3, ……….

[0076] This embodiment can improve the surveying accuracy by calculating the horizontal distance during movement in sections and summarizing them, and reduce the impact of soil slopes and pits on the measurement data. The distance traveled by the rear wheel 2 in each unit time is fixed, and the distance traveled in each unit time corresponds to a horizontal movement distance. At the end of each unit time, the inclination angle of the frame 1 relative to the horizontal plane may be different. Each horizontal movement distance is calculated by the travel distance and the inclination angle, and the statistical distance is obtained by summing up the horizontal movement distances. Then calculate the travel distance of the rear wheel 2 that is less than one unit time, that is, the compensation distance, and add the statistical distance and the compensation distance to obtain the total horizontal movement distance of the rear wheel 2 when it is moving straight with higher accuracy.

[0077] Embodiment 2, as Figure 1-Figure 7As shown, a measuring device for land area surveying proposed in this embodiment, compared with the first embodiment, in this embodiment, further includes a deflection warning mechanism, the deflection warning mechanism reminds the surveyor to correct the driving direction when the front wheel assembly deviates from the straight direction, the deflection warning mechanism includes a connecting rod 13 arranged on the mounting shaft 7 and distributed in the same direction as the front wheel 5, an incomplete gear 14 arranged at the outer end of the connecting rod 13 and distributed around the mounting shaft 7, an intermediate gear 15 rotatably arranged on the frame 1 and meshing with the incomplete gear 14, a swing shaft 17 rotatably arranged on the frame 1, a driven gear 16 arranged on the swing shaft 17 and meshing with the intermediate gear 15, a swing frame 18 arranged on the swing shaft 17, a pointer 25 arranged on the top of the swing frame 18 and eccentrically distributed with the swing shaft 17, a disk frame 27 arranged on the support frame 38, and a dial 26 arranged on the disk frame 27, the top surface of the dial 26 has scale lines distributed around the swing shaft 17. During the driving process of the measuring device, the front wheel 5 may deflect and deviate from the straight driving direction. At this time, the front wheel 5 drives the mounting shaft 7 to rotate through the front wheel frame 6, and the mounting shaft 7 drives the driven gear 16 to rotate through the connecting rod 13, the incomplete gear 14 and the intermediate gear 15. The driven gear 16 rotates in the same direction as the incomplete gear 14. The driven gear 16 drives the pointer 25 to rotate through the swing shaft 17 and the swing frame 18. The direction indicated by the pointer 25 on the dial 26 changes. The surveyor can judge whether the driving direction of the measuring device needs to be corrected by observing whether the deflection direction of the pointer 25 reaches the preset value.

[0078] The diameters of the incomplete gear 14, the intermediate gear 15 and the driven gear 16 decrease in sequence, so when the front wheel 5 deflects a small angle, the pointer 25 can be deflected to a larger angle through the deflection warning mechanism to amplify the deflection, which is helpful for the surveyor to promptly notice whether the deflection is too large. In addition, because the diameters of the incomplete gear 14, the intermediate gear 15 and the driven gear 16 decrease in sequence, the resistance to the deflection of the front wheel 5 is also greater.

[0079] A mounting cover 24 may be provided on the top of the frame 1 , and the mounting cover 24 covers the connecting rod 13 , the incomplete gear 14 , the intermediate gear 15 and the driven gear 16 for protection.

[0080] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, two groups of alarm components are symmetrically arranged on the frame 1 along the width direction about the swing axis 17. The alarm component includes a bracket 22 arranged on the frame 1, an arc rod 21 distributed around the swing axis 17 and slidably arranged on the bracket 22, a mounting plate 20 and a limit table 211 respectively connected to the two ends of the arc rod 21, a first spring 23 sleeved on the outer periphery of the arc rod 21 and connected to the mounting plate 20 and the bracket 22 at both ends, a pressure sensor 12 arranged on the mounting plate 20, and a sound alarm arranged on the frame 1. The bottom end of the swing frame 18 is connected to a push plate 19 that can push the pressure sensor 12. The pressure sensor 12 is connected to the central controller for communication, and the central controller is connected to the sound alarm for control. When the swing frame 18 rotates, it can drive the push plate 19 to rotate, and the push plate 19 presses on the pressure sensor 12 on the mounting plate 20. The pressure sensor 12 sends a signal to the central controller, and the central controller controls the sound alarm to sound an alarm. When the push plate 19 is pressed on the pressure sensors 12 at different positions on both sides, the sound alarm can emit sound alarms of "left deflection" and "right deflection" respectively.

[0081] This embodiment can detect the degree of deflection of the front wheel 5, and when the deflection is too large, it can warn the surveyor to promptly correct the driving direction of the measuring device to a straight-ahead state.

[0082] Embodiment three, as Figure 1-Figure 7 As shown, a measuring device for land area surveying and mapping proposed in this embodiment, compared with the first embodiment, in this embodiment, further includes a liquid spray marking mechanism, which includes a turntable 28 arranged on a rotating shaft 201, a connecting rod 29 eccentrically arranged on the turntable 28, a connecting shaft 30 connected to the outer end of the connecting rod 29, a sliding rod 31 rotatably connected to the connecting shaft 30, a piston 32 connected to the outer end of the sliding rod 31, a paint bucket 33 and a three-way pipe 34 arranged on the frame 1, and a nozzle 35 arranged on the three-way pipe 34, the paint bucket 33 has a through hole on the top, the three-way pipe 34 includes a vertical pipe part and a horizontal pipe part, the vertical pipe part is connected to the upper part of the horizontal pipe part, the top of the vertical pipe part is connected to the bottom end of the paint bucket 33, the piston 32 is slidingly sealed and arranged on the inner side of the horizontal pipe part, the sliding rod 31 passes through one lateral end of the horizontal pipe part, the nozzle 35 is connected to the other lateral end of the horizontal pipe part and has a liquid spray port distributed downward. When the rear wheel 2 rotates, the rotating disk 28 is driven to rotate through the rotating shaft 201, and the rotating disk 28 drives the piston 32 to reciprocate through the connecting rod 29, the connecting shaft 30 and the sliding rod 31. When the piston 32 moves away from the nozzle 35, the vertical tube part is exposed, and the pigment in the paint bucket 33 flows downward to the horizontal tube part through the vertical tube part. When the piston 32 moves toward the nozzle 35, the piston 32 pushes the pigment out of the nozzle 35. The piston 32 reciprocates and can intermittently spray pigment on the land through the nozzle 35. After the measurement of this measuring device is completed, the surveyor visually observes the residual pigment track on the land to determine whether the driving direction has a large error. If the error is large, re-measure, if the error is small, no re-measurement is required.

[0083] A guide frame 36 is provided at one end of the transverse tube portion of the three-way pipe 34, a filter screen 37 is provided on the guide frame 36, and the slide bar 31 is slidably provided on the guide frame 36. The guide frame 36 can guide the sliding of the slide bar 31 so that the slide bar 31 can maintain horizontal sliding. The filter screen 37 can prevent dust and other debris in the outside air from entering the interior of the three-way pipe 34.

[0084] This embodiment can spray paint onto the ground during measurement, so that it is convenient to observe whether the paint is distributed in a straight line after the measurement is completed, which serves as a basis for whether re-measurement is needed.

[0085] Embodiment 4, as Figure 1-Figure 7 As shown, the present embodiment proposes a measuring device for land area surveying and mapping. Compared with the first embodiment, in the present embodiment, two groups of stabilizing components are symmetrically arranged on the frame 1 along the width direction. The stabilizing components include a connecting frame 44 arranged on the side of the frame 1, a sliding column 42 vertically slidingly arranged on the connecting frame 44, a top plate 43 arranged at the top of the sliding column 42, a side wheel frame 41 arranged at the bottom of the sliding column 42, a second spring 45 sleeved on the outer periphery of the sliding column 42 and connected to the connecting frame 44 and the side wheel frame 41 at both ends, and a side wheel 40 rotatably arranged on the side wheel frame 41. The side wheel 40 is coaxially distributed with the rear wheel 2, and the two groups of stabilizing components can travel on both sides, so as to ensure that the entire device travels in a relatively stable posture as much as possible.

[0086] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A measuring device for land area surveying and mapping, characterized in that: include: A vehicle frame (1) is provided with a front wheel assembly, a rear wheel assembly, a power device (4), a gyroscope (8) and a storage battery, wherein the rear wheel assembly comprises a rear wheel (2), an output end of the power device (4) is transmission-connected to the rear wheel (2), and the storage battery is electrically connected to the power device (4) and the gyroscope (8); A timing module (9) which times the total running time of the rear wheel (2) and generates a timing signal every preset unit time; The central controller (10) is connected to the power device (4) for control, and is connected to the gyroscope (8) and the timing module (9) for communication. It receives the data of the inclination angle of the frame (1) relative to the horizontal plane detected by the gyroscope (8), receives the timing signal generated by the timing module (9) and the total running time data of the rear wheel (2) for statistics, and calculates the total horizontal movement distance of the rear wheel (2) when it is moving straight. The calculation method is as follows: The linear speed v of the rear wheel (2) when traveling: v=πDn Wherein, D is the diameter of the rear wheel (2), and n is the rotational speed of the rear wheel (2), which is equal to the rotational speed of the output end of the power device (4); The distance d traveled by the rear wheel (2) in unit time Δt is: d=vΔt The horizontal movement distance l of the rear wheel (2) in the i-th unit time i : l i =d cosα i Among them, α i is the inclination angle of the frame (1) relative to the horizontal plane at the end of the i-th unit time measured by the gyroscope (8), 0≤α i ≤90°; The sum of the horizontal movement distances of the rear wheels (2) in all unit times is calculated to obtain the statistical distance L1: The timing module (9) counts the total time T taken by the rear wheel (2) from the starting point to the end point of the straight line. After the timing module (9) generates the last timing signal, when the remaining time does not reach one unit time, the compensation distance L2 traveled by the rear wheel (2) in the remaining time is calculated: L2=(T-kΔt)v in, From the above formula we get: Wherein, L is the total horizontal movement distance of the rear wheel (2) when it moves straight, i=1, 2, 3, ...; The front wheel assembly comprises a mounting shaft (7) rotatably mounted on a vehicle frame (1), a front wheel frame (6) mounted at the bottom of the mounting shaft (7), and a front wheel (5) rotatably mounted on the front wheel frame (6), wherein the front wheel (5) and the mounting shaft (7) are staggered and arranged; the rear wheel assembly further comprises a rear wheel frame (3) mounted on the vehicle frame (1) and a rotating shaft (201) rotatably mounted on the rear wheel frame (3); the rear wheel (2) is coaxially mounted on the rotating shaft (201); a support frame (38) is mounted on the vehicle frame (1), and two handles (39) are symmetrically mounted on the top of the support frame (38); The vehicle also includes a deflection warning mechanism, which reminds the surveyor to correct the driving direction when the front wheel assembly deviates from the straight-ahead direction. The deflection warning mechanism includes a connecting rod (13) arranged on the mounting shaft (7) and distributed in the same direction as the front wheel (5), an incomplete gear (14) arranged at the outer end of the connecting rod (13) and distributed around the mounting shaft (7), an intermediate gear (15) rotatably arranged on the vehicle frame (1) and meshingly connected with the incomplete gear (14), a swing shaft (17) rotatably arranged on the vehicle frame (1), a driven gear (16) arranged on the swing shaft (17) and meshingly connected with the intermediate gear (15), a swing frame (18) arranged on the swing shaft (17), a pointer (25) arranged on the top of the swing frame (18) and eccentrically distributed with the swing shaft (17), a disk frame (27) arranged on the support frame (38), and a scale plate (26) arranged on the disk frame (27), wherein the top surface of the scale plate (26) has scale lines distributed around the swing shaft (17); The diameters of the incomplete gear (14), the intermediate gear (15) and the driven gear (16) decrease in sequence.

2. A land area surveying and mapping measuring device according to claim 1, characterized in that: Two groups of alarm components are symmetrically arranged on the frame (1) along the width direction with respect to the swing axis (17), and the alarm components include a bracket (22) arranged on the frame (1), an arc rod (21) distributed around the swing axis (17) and slidably arranged on the bracket (22), a mounting plate (20) and a limit platform (211) respectively connected to the two ends of the arc rod (21), a first spring (23) sleeved on the outer periphery of the arc rod (21) and connected to the mounting plate (20) and the bracket (22) at both ends, a pressure sensor (12) arranged on the mounting plate (20), and a sound alarm arranged on the frame (1), a push plate (19) capable of pushing the pressure sensor (12) is connected to the bottom end of the swing frame (18), the pressure sensor (12) is communicatively connected to a central controller, and the central controller is control-connected to the sound alarm.

3. A land area surveying and mapping measuring device according to claim 1, characterized in that: The invention also comprises a liquid spray marking mechanism, which comprises a rotating disk (28) arranged on a rotating shaft (201), a connecting rod (29) eccentrically arranged on the rotating disk (28), a connecting shaft (30) connected to the outer end of the connecting rod (29), a sliding rod (31) rotatably connected to the connecting shaft (30), a piston (32) connected to the outer end of the sliding rod (31), a paint bucket (33) and a three-way pipe (34) arranged on the frame (1), and a nozzle (35) arranged on the three-way pipe (34), wherein the paint bucket (33) has a through hole at the top, the three-way pipe (34) comprises a vertical pipe part and a horizontal pipe part, the vertical pipe part is connected to the upper part of the horizontal pipe part, the top end of the vertical pipe part is connected to the bottom end of the paint bucket (33), the piston (32) is slidingly sealed and arranged on the inner side of the horizontal pipe part, the sliding rod (31) passes through one lateral end of the horizontal pipe part, and the nozzle (35) is connected to the other lateral end of the horizontal pipe part and has a liquid spraying port distributed downward.

4. A land area surveying and mapping measuring device according to claim 3, characterized in that: A guide frame (36) is arranged at one end of the transverse pipe portion of the three-way pipe (34), a filter screen (37) is arranged on the guide frame (36), and the slide rod (31) is slidably arranged on the guide frame (36).

5. The measuring device for land area surveying and mapping according to claim 1, characterized in that: Two groups of stabilizing components are symmetrically arranged on the frame (1) along the width direction, and the stabilizing components include a connecting frame (44) arranged on the side of the frame (1), a sliding column (42) arranged on the connecting frame (44) for vertical sliding, a top plate (43) arranged on the top end of the sliding column (42), a side wheel frame (41) arranged on the bottom end of the sliding column (42), a second spring (45) sleeved on the outer periphery of the sliding column (42) and connected to the connecting frame (44) and the side wheel frame (41) at both ends, and a side wheel (40) rotatably arranged on the side wheel frame (41).

6. A method for using the measuring device for land area surveying and mapping according to claim 1, characterized in that: The following steps are involved: S1, moving the rear wheel (2) to the starting point of the straight-ahead measurement; S2, the power device (4) drives the rear wheel (2) to rotate, the timing module (9) generates a timing signal every preset unit time, and transmits the timing signal to the central controller (10), and the central controller (10) receives the inclination angle data of the frame (1) relative to the horizontal plane detected by the gyroscope (8) at this moment; S3, a unit time is preset, and the travel distance of the rear wheel (2) is fixed in each unit time. The product of the travel distance of the rear wheel (2) and the cosine value of the inclination angle of the frame (1) in each unit time is calculated, and the product is used as the horizontal movement distance of the rear wheel (2) in the unit time. The sum of the horizontal movement distances of the rear wheel (2) in all unit times is counted to obtain a statistical distance; S4, for the total running time of the rear wheel (2), after the timing module (9) generates the last timing signal, when the remaining time does not reach one unit time, the product of the remaining time and the linear speed of the rear wheel (2) is used as the compensation distance; S5. Add the statistical distance and the compensation distance to obtain the total horizontal movement distance of the rear wheel (2) when traveling straight.

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