Land area mapping device

Abstract

The application belongs to the technical field of surveying and mapping devices, and relates to a land area surveying and mapping device. The application comprises a support, a measuring wheel, an angle gauge and a driving motor. The angle gauge is used for detecting the inclination angle of the support. A counter measures the number of rotations of the measuring wheel by detecting the counting marks on the measuring wheel. The driving motor is linked with the angle gauge and is used for driving the counter to rotate in the same direction as the measuring wheel according to the inclination angle measured by the angle gauge, so as to change the relative motion state of the counter and the counting marks. When the device moves through large pits and bumps or convex topography, the driving motor is used to drive the counter to move in the same direction to delay the cooperation time between the counter and the counting marks, so that the excess rolling path caused by the undulating topography is automatically deducted at the signal source, and the surveying and mapping precision of the land area is greatly improved. Meanwhile, the driving motor is prevented from being frequently and invalidly started through the partition control setting, and the service life of the driving motor is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of surveying and mapping equipment technology, and relates to a land area surveying and mapping device. Background Technology

[0002] In land surveying and planning in plains areas, it is usually necessary to accurately measure the length of the land, and then calculate the overall area of ​​the land by using the length measurement results from multiple directions. Currently, manual distance-counting wheelbarrows are commonly used in field surveying operations for mechanical rolling and counting measurements.

[0003] However, in actual field environments, the surface of plains is not completely flat; there are still significant potholes or uneven surfaces. When a traditional distance measuring vehicle traverses these larger potholes or uneven surfaces, its measuring wheels inevitably fall into the pothole or roll along the slope of the uneven surface, resulting in a longer physical path for the measuring wheels. This increased actual travel path directly leads to an inflated number of physical rotations of the measuring wheels. If the length is directly converted from the number of rotations, the resulting measurement value will be significantly larger than the actual horizontal projection length, thus generating a serious positive cumulative error and affecting the accuracy of land area surveying.

[0004] Existing improved measurement methods typically optimize the mechanical adjustment mechanism of the measuring wheel or increase its diameter to allow it to traverse smaller potholes without falling in, thus mitigating the interference of tiny potholes on measurement accuracy. However, when encountering larger potholes or higher protruding terrain, the measuring wheel may still fall into the pothole or roll along the slope surface, resulting in a longer actual rolling path and affecting the accuracy of land area mapping.

[0005] To address the aforementioned problems, this invention proposes a land area surveying device. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a land area surveying device.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A land area surveying device, comprising a support and a measuring wheel rotatably mounted on the support, and further comprising: An angle meter, mounted on the bracket, is used to detect the tilt angle of the bracket; A counter, mounted on a bracket, is used to measure the number of rotations of the measuring wheel by detecting the counting marks on the measuring wheel; A drive motor, mounted on the bracket and linked to the angle meter, is used to drive the counter and the measuring wheel to rotate in the same direction according to the tilt angle measured by the angle meter, so as to change the relative motion state between the counter and the counting mark.

[0008] Furthermore, a turntable is fixedly connected to the output shaft of the drive motor, and the counter is fixedly mounted on the surface of the turntable.

[0009] Furthermore, the counting mark is a counting hole formed on the surface of the measuring wheel.

[0010] Furthermore, the counter employs a laser sensor.

[0011] Furthermore, a travel motor is installed at the bottom of the bracket, and the output shaft of the travel motor is fixedly connected to the measuring wheel to drive the entire device to move automatically.

[0012] Furthermore, a control display is installed at the upper end of the bracket, and the counter transmits the lap count signal to the control display to calculate and display the land length.

[0013] Furthermore, the rear side of the bracket is rotatably connected to a driven wheel that cooperates with the movement of the measuring wheel.

[0014] Furthermore, the support is provided with a handle for human hand gripping.

[0015] Compared with the prior art, the present invention has the following beneficial effects: by measuring the tilt angle of the ground with an angle meter, adjusting the speed of the drive motor according to the tilt angle, and then adjusting the relative motion state between the counter and the measuring wheel, the redundant path caused by the slope can be automatically eliminated at the signal source, so that the measured length processed and displayed by the final control display is closer to the real horizontal distance, effectively reducing the mapping error under undulating terrain and ensuring the mapping accuracy of land area. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the positions of the driven wheel and the measuring wheel in this invention; Figure 3 This is a partial cross-sectional view of the bracket in this invention; Figure 4 This is a schematic diagram of the measuring wheel in this invention; Figure 5 This is a schematic diagram of the state of the measuring wheel on a slope in this invention.

[0017] In the diagram: 1. Bracket; 2. Handle; 3. Control display; 4. Angle gauge; 5. Measuring wheel; 6. Driven wheel; 7. Travel motor; 8. Drive motor; 9. Turntable; 10. Counter; 11. Counting hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: As Figures 1-5 As shown, the technical solution adopted by the present invention is as follows: A land area surveying device includes a support 1, a measuring wheel 5, an angle meter 4, and a drive motor 8.

[0020] The support frame 1 can adopt a U-shaped frame structure. A handle 2 is fixedly installed on the top of the support frame 1 for the operator to hold, so as to facilitate manual support or guide the movement of the device.

[0021] A control display 3 is also provided on the support 1 to process and calculate the measurement data and output the land length intuitively.

[0022] The measuring wheel 5 is rotatably mounted on the bottom front side of the bracket 1, and the travel motor 7 is fixedly mounted on the bracket 1. The output shaft of the travel motor 7 is fixedly connected to the measuring wheel 5. The travel motor 7 serves as the power source for movement, driving the measuring wheel 5 to rotate and propelling the entire device forward, eliminating the need for manual pushing and pulling and reducing the operator's workload.

[0023] like Figure 1 , Figure 2 As shown, in order to coordinate with the movement of the measuring wheel 5 and maintain the balance of the device, a driven wheel 6 is rotatably connected to the rear side of the bracket 1.

[0024] like Figure 3 As shown, a turntable 9 is rotatably mounted on the lower end of the bracket 1. The axis of the turntable 9 is on the same straight line as the axis of the measuring wheel 5. A drive motor 8 is mounted on the lower end of the bracket 1, and the drive motor 8 and the travel motor 7 are located on opposite sides of the bracket 1. The output shaft of the drive motor 8 is fixedly connected to the turntable 9 and is used to drive the turntable 9 to rotate.

[0025] like Figure 3 As shown, a counter 10 is installed on the end face of the turntable 9. The counter 10 measures the number of rotations of the measuring wheel 5 by detecting the counting marks on the measuring wheel 5. The counter 10 transmits the rotation signal to the control display 3, which processes and calculates the rotation signal and then outputs the land length visually.

[0026] In this embodiment, the counting mark is the counting hole 11 opened on the measuring wheel 5.

[0027] In this embodiment, the counter 10 preferably uses a laser sensor. When the laser emitted by the laser sensor penetrates the counting hole 11, a photoelectric signal is triggered, which indicates that the measuring wheel 5 has rotated one revolution.

[0028] Of course, in other embodiments, the counter 10 can also be a Hall sensor, an infrared sensor, an inductive proximity switch, etc. Correspondingly, the counting marks set on the measuring wheel 5 can be magnets, infrared reflectors, metal protrusions, etc., that match the counter 10.

[0029] Angle meter 4 is mounted on bracket 1 to detect the tilt angle of bracket 1 relative to the horizontal plane in real time during the movement of the device.

[0030] The angle meter 4 and the drive motor 8 are both electrically connected to the control display 3. The angle meter 4 transmits the measured angle signal to the control display 3, and the control display 3 controls the operation of the drive motor 8 according to the angle signal.

[0031] Working principle: During normal operation, the operator holds the handle 2 and starts the travel motor 7. The travel motor 7 drives the measuring wheel 5 to rotate, propelling the entire device forward. As the measuring wheel 5 rotates, the counting holes 11 on its side surface rotate synchronously. The counter 10 on the turntable 9 measures the number of rotations of the measuring wheel 5 and transmits the measured number of rotations to the control display 3, which then calculates the actual length of the land.

[0032] like Figure 5 As shown, when the device passes over large potholes or protruding slopes on flat land, the movement of the device along the slope will cause the entire support 1 to tilt. At this time, the angle meter 4 detects the current tilt angle in real time.

[0033] For the same true horizontal projection distance, the greater the slope angle, the longer the actual path of the slope, resulting in a significantly higher actual number of rotations required for the measuring wheel 5 to roll across the slope. If the length is directly calculated based on the actual number of rotations, the measurement value output by the control display 3 will be significantly greater than the true horizontal projection distance, generating a positive cumulative error.

[0034] To dynamically compensate for the error caused by the terrain undulation, the angle meter 4 controls the drive motor 8 to drive the turntable 9 and the counter 10 to rotate in the same direction as the measuring wheel 5, based on the real-time detected tilt angle.

[0035] Because the counter 10 and the measuring wheel 5 rotate in the same direction, their relative motion changes, reducing their relative rotational speed and delaying the alignment of the counter 10 with the counting hole 11, which serves as the counting mark. In other words, on flat ground, the counter 10 does not rotate, and the counter 10 counts one revolution for every revolution of the measuring wheel 5. However, when encountering a slope, the measuring wheel 5 actually needs to rotate more than one revolution for the counter 10 to count one revolution.

[0036] The larger the tilt angle detected by the angle meter 4, the faster the speed at which the drive motor 8 drives the counter 10 to rotate, and the maximum speed of the counter 10 is set to be lower than the speed of the measuring wheel 5.

[0037] By adjusting the relative motion of the counter 10 and the measuring wheel 5 according to the terrain slope, the redundant path caused by the slope can be automatically eliminated at the signal source, so that the measured length processed and displayed by the final control display 3 is closer to the true horizontal distance, effectively reducing the surveying error caused by terrain undulation.

[0038] Example 2: This example is a further improvement based on Example 1.

[0039] Since the actual surface of the land in the field generally has a large number of small bumps or pits, in order to prevent the drive motor 8 from being frequently triggered to start and stop and causing damage, a range hierarchical control mechanism is adopted.

[0040] When the device passes over a small protrusion, and the angle of the bracket 1 detected in real time by the angle meter 4 is within ±2°, that is, within 2 degrees in absolute value, the measurement error is small because the actual slope path is close to the horizontal projection length. At this time, the drive motor 8 does not rotate, thereby avoiding frequent starting of the drive motor 8 due to small terrain undulations.

[0041] When the absolute value of the tilt angle increases to between 2° and 4°, the angle gauge 4 controls the drive motor 8 to operate at a corresponding first-level speed for appropriate compensation. When the absolute value of the tilt angle further increases to between 4° and 6°, the drive motor 8 is controlled to operate at another corresponding higher second-level speed.

[0042] Similarly, within the angular range of 0° to 90°, each two-degree interval corresponds to one output speed of the drive motor 8. This zoned control method ensures that the device does not blindly trigger the drive motor 8 when passing through small-angle protrusions, and can automatically intervene for precise compensation when the terrain slope increases. This significantly improves the accuracy of land surveying while effectively extending the service life of the drive motor 8.

[0043] The control display 3 internally stores a tilt angle-drive motor 8 speed compensation mapping table. Based on the angle input in real time by the angle meter 4, the control display 3 retrieves the mapping table and outputs the corresponding speed of the drive motor 8. The specific tilt angle-drive motor 8 speed compensation mapping table can be pre-calibrated through theoretical calculations or obtained by experimentally measuring the correspondence between the actual terrain slope and the measurement error.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A land area surveying device, comprising a support (1) and a measuring wheel (5) rotatably mounted on the support (1), characterized in that, Also includes: An angle meter (4) is installed on the bracket (1) to detect the tilt angle of the bracket (1); A counter (10), mounted on a bracket (1), is used to measure the number of rotations of the measuring wheel (5) by detecting the counting marks on the measuring wheel (5); A drive motor (8) is mounted on the bracket (1) and linked with the angle meter (4). It is used to drive the counter (10) and the measuring wheel (5) to rotate in the same direction according to the tilt angle measured by the angle meter (4), so as to change the relative motion state of the counter (10) and the counting mark.

2. The land area surveying device according to claim 1, characterized in that: A turntable (9) is fixedly connected to the output shaft of the drive motor (8), and the counter (10) is fixedly installed on the surface of the turntable (9).

3. The land area surveying device according to claim 1, characterized in that: The counting mark is a counting hole (11) opened on the surface of the measuring wheel (5).

4. The land area surveying device according to claim 3, characterized in that: The counter (10) uses a laser sensor.

5. The land area surveying device according to claim 1, characterized in that: The bottom of the bracket (1) is equipped with a traveling motor (7), and the output shaft of the traveling motor (7) is fixedly connected to the measuring wheel (5) to drive the entire device to move automatically.

6. The land area surveying device according to claim 1, characterized in that: The upper end of the bracket (1) is equipped with a control display (3), and the counter (10) transmits the lap count signal to the control display (3) to calculate and display the land length.

7. The land area surveying device according to claim 1, characterized in that: The rear side of the bracket (1) is rotatably connected to a driven wheel (6) that moves in conjunction with the measuring wheel (5).

8. The land area surveying device according to claim 1, characterized in that: The bracket (1) is provided with a handle (2) for a person to hold.

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