JP2003239328A - Measuring device of earthwork construction surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring device of an earthwork construction surface capable of easily seizing a quantity of required sediment at ground leveling work by precisely measuring construction accuracy of a ground leveling surface in real time. <P>SOLUTION: This measuring device has GPS antennas 2a and 2b for detecting a position and a longitudinal directional inclination of heavy machinery 1, and a roller inclination sensor 4 for detecting a roller attitude of the heavy machinery 1, and has an on-vehicle control part 5 for inputting a signal from the GPS antennas 2a and 2b and the roller inclination sensor 4, a central control part 6 linked with the on-vehicle control part 5 by radio data, and display parts 7a and 7b connected to the central control part 6 or the on-vehicle control part 5. The on-vehicle control part 5 and the central control part 6 arithmetically operate the absolute height of the heavy machinery 1 by offsetting an inclination component of the heavy machinery 1 from the inputted signal. A difference between the absolute height of this actual ground leveling surface and the ground leveling surface height on a plan and a quantity of cut banking are displayed on the display parts 7a and 7b. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthwork construction surface measuring apparatus, and more particularly to an apparatus for measuring construction accuracy when grounding a relatively wide range of ground with heavy equipment.

[0002]

2. Description of the Related Art Generally, when it is necessary to prepare a relatively wide area such as in the development of a residential land, the ground is cut and filled to ensure that the surface is as flat as possible.

Therefore, it is necessary to measure the height of the ground accurately and to judge how much cutting and embankment can be carried out based on the result.

Conventionally, as such a method for measuring the ground height, manned surveying has been carried out before ground leveling, and the ground is marked with a marking indicating the planned ground height. In addition, the amount of earth and sand to be input or the amount of earth and sand to be spread out was determined from the difference between the measured actual ground level and the planned ground level. After that, cutting embankment was performed by using the tension as a mark to match it, and the amount of soil carried was measured each time to calculate the amount of cutting embankment.

[0005]

However, in the above-mentioned conventional method, it is possible to avoid the manual labor and cost because the surveying for the stitching, the stitching work, and the measurement of the soil transportation amount are required. Absent.

[0006] Further, since the volume of production and the required amount of sediment are not known until the manned measurement is completed, the leveling work by heavy equipment is frequently interrupted to evaluate these, and further inefficient work of further leveling work is performed. I had to do it.

Conventionally, since the results of such manned surveys are reflected in the performance management and operation plan, it is impossible to obtain information that contributes to workmanship management and soil planning unless such manned surveys are completed. .

The present invention is to solve the above-mentioned conventional problems. The problem is that the construction accuracy of the ground leveling can be precisely and easily measured in real time, and information such as the required amount of sediment is obtained during the leveling operation. Another object of the present invention is to provide a measuring device for the earthwork construction surface that is obtained in the above.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned technical problems, the measuring device for the earthwork construction surface of the present invention is constructed as follows.

That is, a device for measuring the plane accuracy of the cut embankment carried out in the section to be leveled,
The GPS antenna 2 provided on the heavy equipment 1 for leveling the cut soil, the roll inclination sensor 4 for detecting the roll attitude of the heavy equipment 1, and the signals from the GPS antennas 2a and 2b and the roll inclination sensor 4 are input. In-vehicle control unit 5
And the display units 7a and 7b that display information based on the input signals, and the vehicle-mounted control unit 5 uses the signals from the GPS antennas 2a and 2b and the roll tilt sensor 4 to determine the tilt component of the heavy equipment 1. It is characterized in that the absolute height of the heavy equipment 1 that has been offset is calculated, the height difference between the actual ground level and the planned ground level is calculated, and this height difference is displayed on the display units 7a and 7b.

The GPS antennas 2a and 2b and the roll inclination sensor 4 are provided on the heavy equipment 1, and detect the inclination of the heavy equipment 1 in the front-rear direction and the left-right direction. Therefore, based on the detected inclinations of the heavy equipment 1 in the front-rear direction and the left-right direction, a pitch that occurs between the vertical line passing through the center point G of the heavy equipment 1 and the actual center line of the heavy equipment 1 and indicates the inclination degree in the front-rear direction. Both the angle A and the roll angle B indicating the inclination in the left-right direction can be measured.

According to the present invention, since the height difference between the actual ground level and the planned ground level is calculated in consideration of the inclination of the heavy machine 1 during construction, a highly accurate level of ground construction is displayed.

A second aspect of the present invention is an apparatus for measuring the plane accuracy of the cut embankment carried out in a section to be leveled, and a heavy machine 1 for leveling the cut embankment, and at least the heavy machine 1 provided on the heavy machine 1. Three GPS antennas 2a, 2b, 2c, an on-vehicle control unit 5 to which signals from these GPS antennas 2a, 2b, and 2c are input, and display units 7a and 7b for displaying information based on the input signals. And at least the GPS antennas 2a and 2b along the front-back direction of the heavy equipment 1.
2 are installed side by side, and the other GPS antenna 2c is provided on a straight line that is orthogonal to the front-back direction of the heavy equipment 1 and that passes through the installation positions of the GPS antennas 2a and 2b that are installed side by side.
The vehicle-mounted control unit 5 uses the GPS antennas 2a,
The tilt component of the heavy equipment 1 is detected based on the signals from 2b and 2c, and the absolute height of the heavy equipment 1 that cancels this tilt component is calculated to calculate the height difference between the actual ground level and the planned ground level. The height difference is displayed on the display units 7a and 7b.

As described above, by using at least three GPS antennas 2a, 2b, 2c, the inclination of the heavy machine 1 in the front-rear direction and the left-right direction, that is, both the pitch angle A and the roll angle B can be measured.

Here, the GPS antennas 2a, 2b, 2c
Is a receiving antenna in the Global Positioning System (GPS). This system uses radio waves (L1: 1575.42MHz, L2: 12MHz) sent from a total of 24 GPS satellites that orbit at 6 altitudes at 20,000 meters.
27.60 MHz) to calculate the absolute position of the receiving antenna. The position accuracy varies depending on the receiving method and the like, but there is a real-time kinematic method as a method capable of highly accurate measurement.

The real-time kinematic method generally defines a fixed place on the ground where the latitude and longitude are accurately known in advance, and installs the first GPS antenna on the fixed place, while at the moving side such as a vehicle. Install 2 GPS antennas. The absolute position of the second GPS antenna (vehicle or the like) can be obtained with an accuracy of about 20 mm by detecting the phase difference between the GPS signals received by the two antennas.

In the present invention, it is desirable to measure the position by the real-time kinematic method from the viewpoint of accuracy.

Further, there is provided a central control unit 6 which is wirelessly data-linked to the on-vehicle control unit 5, and the central control unit 6 receives signals from the respective GPS antennas 2a, 2b, 2c and / or the roll inclination sensor 4. The tilting component of the heavy equipment 1 is detected based on the
Can be calculated to calculate an absolute difference in height between the actual ground level and the planned leveled ground, and the height difference can be displayed on the display unit 7b.

The central control unit 6 can be provided at a fixed location apart from the heavy equipment 1. It is possible to perform remote control of the heavy equipment 1, management of the amount of cut embankment, etc. based on the information displayed on the display section 7b incorporated in the central control section 6 or provided side by side. In this case, the display 7a of the heavy equipment 1 may not be provided.

The on-vehicle control unit 5 and the central control unit 6 are microcomputers each including a micro processing unit and various memories, and are configured to be mutually wireless data linked for data communication by the real-time kinematic method. Preferably.

The display units 7a and 7b are all display devices including a liquid crystal display, a CRT display, and a printer.

It should be noted that the heavy equipment 1 may be any type of unmanned manned person, but in the case of unmanned, it is desirable to appropriately provide a video equipment such as a video camera around the main body of the heavy equipment 1 or around the compartment.

The display portion 7a can be mounted on the heavy equipment 1, and in this case, the heavy equipment 1 is operated by an operator who rides on the heavy equipment 1. The operator can work on the cut embankment based on the information on the height difference between the actual ground level and the planned ground level displayed on the display unit 7a to level the ground at the planned level. Therefore, even if the operator is not skilled in such work, it is possible to easily obtain an accurate finish.

Further, on the display units 7a and 7b, the inside of the section to be leveled is divided into squares of a predetermined size, and the actual ground level and the planned ground level are calculated in units of these squares, and the difference in height between them is calculated. It is possible to display or convert the height difference between the actual ground level and the planned ground level in units of squares into color differences for display (color-based display).
These functions are mainly realized by application software of the vehicle-mounted control unit 5 and the central control unit 6.

Furthermore, it is possible to calculate the amount of cut embankment by multiplying the height difference between the original ground surface before construction and the actual ground level by the area of the grid, and display this amount on the display unit. Is. By doing so, it is possible to manage the production volume (soil volume) in real time, and to omit the calculation work of the soil volume by hand.

In the present invention, the accurate position of the heavy equipment can be calculated by correcting the inclination of the heavy equipment on the basis of the inclination information obtained from the GPS antenna or the like. An accurate height difference from the ground level can be shown on the display unit in real time.

Further, when the amount of cut soil is displayed on the display unit, a troublesome calculation of the amount of soil becomes unnecessary.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION The earthworking surface measuring apparatus of the present invention will now be described in more detail with reference to the embodiments shown in FIGS.

FIG. 1 shows a heavy machine, and FIG. 4 shows a block diagram of this measuring apparatus. FIG. 3 shows the outline of the entire apparatus for measuring the plane accuracy of the cut embankment leveling performed in the section to be leveled. In the present embodiment, the heavy machine 1 for cutting and embankment is a manned type operated by a person boarding the machine, but for example, in a situation where the construction site is at risk due to a disaster or the like, an unmanned radio It can also be a control type.

The heavy equipment 1 is a bulldozer having a caterpillar 1a as shown in FIG. 1, and GPS antennas 2a and 2b are provided on the roof portion thereof. These GPS antennas 2a and 2b are arranged in parallel along the front-rear direction of the heavy equipment 1 (shown by an arrow A), and between these GPS antennas 2a and 2b, the roll attitude of the heavy equipment 1 is detected. A roll tilt sensor 4 is provided. In addition, GPS
The antenna 2a has a height H of the heavy equipment 1 from the center point G of the heavy equipment 1.
However, it is on a line passing through the center point G. On the other hand, the GPS antenna 2b is located on the rear side of the heavy equipment 1, and is installed at a predetermined distance D from the GPS antenna 2a.

FIG. 2 shows a GPS antenna 2 provided on the heavy equipment 1.
a and a GPS antenna 21 fixedly provided in a fixed station 20 apart from the heavy equipment 1. In the fixed station 20, a GPS antenna 21, a GPS receiver 22 and a transmitter 23 are installed with the adoption of the GPS kinematic method.

On the other hand, since the two GPS antennas 2a and 2b and the roll inclination sensor 4 are provided on the heavy equipment 1 side, the current position three-dimensional coordinates and azimuth of the heavy equipment 1 can be detected. Therefore, the pitch angle and the roll angle when the heavy equipment 1 is tilted can be obtained based on these. That is, the azimuth angle and the pitch angle are two GPS antennas 2a,
It can be obtained from the positional relationship before and after 2b and above and below. The roll angle is measured by the roll tilt sensor 4. The inclination of the heavy equipment 1 is calculated by combining these pieces of information and the GP
The height of the heavy equipment 1 detected by the S antenna 2a can be corrected by this inclination amount, and the absolute height of the heavy equipment can be obtained as described later.

The outline of the entire apparatus will be described with reference to FIG. 3. First, the signals from the GPS antennas 2a and 2b and the roll tilt sensor 4 are input to the vehicle-mounted controller 5. A communication interface 9 and a display unit 7a are connected to the vehicle-mounted control unit 5, respectively.

On the other hand, a control stick 12 is connected to the heavy equipment control section 8 provided in the heavy equipment 1. The operator who has boarded the heavy equipment 1 operates the control stick 12 based on the information displayed on the display unit 7a to control the engine, the oil pressure gauge, and the electric system of the heavy equipment 1.

A wireless LAN is used as the communication interface 9, for example, and high-speed bidirectional data communication with other external stations is possible. In FIG. 3, the fixed station 20
Although the communication with the base station 10 is possible, the base station 10 may be installed arbitrarily, and is mainly installed when the heavy equipment 1 is unmanned.

The vehicle-mounted control unit 5 of the heavy equipment 1 is a microcomputer including a microprocessing unit and various memories, and processes signals from the GPS antennas 2a and 2b and the roll tilt sensor 4 to the outside via the communication interface 9. In addition to sending out, the operating state (status) of the heavy equipment 1 is sent out to the outside.

Here, the vehicle-mounted control unit 5 has a function of calculating the absolute height of the heavy machine 1 that cancels the tilt component of the heavy machine 1 based on the signals sent from the GPS antennas 2a and 2b and the roll tilt sensor 4. There is. Note that this function can also be configured as included in the central control unit 6 described later.

The base station 10 is provided with a central control unit 6 having the same structure as the on-vehicle control unit 5, receives signals sent from the heavy equipment 1 through the communication interface 11, and based on this information. The position of the heavy equipment 1, the amount of cut embankment, etc. is displayed on the display unit 7
Display in b. When the heavy equipment 1 is unmanned, the display unit 7b
Based on the information from the operator, the operator operates the heavy equipment 1 using a remote control device (not shown).

In the fixed station 20, the information from the GPS antenna 21 is sent to the GPS receiver 22, and this information is sent to the transmitter 2.
3 and is sent to the vehicle-mounted control unit 5 via the communication interface 9 of the moving heavy machine 1. In the vehicle-mounted control unit 5, the GPS antenna 2 located on the center point of the heavy equipment 1
GPS signal sent from a and the GPS antenna 2c
The absolute position of the GPS antenna 2a (heavy equipment 1) can be obtained with high accuracy by detecting the phase difference of the signals from the.

Calculation of the absolute height of the heavy equipment 1 is performed as follows.

First, if the height measurement is performed only with the GPS antenna 2a, when the forward tilt of the heavy equipment 1 occurs, ha (lower height is displayed) and fa in FIG.
An error (displayed in front of the actual position of the heavy equipment) occurs. Similarly, when the heavy equipment 1 leans to the left as shown in FIG. 4, hb (the height is displayed low) and fb
The error (displayed to the left of the actual position of the heavy equipment) occurs.

Therefore, the two GPS antennas 2a, 2
The total inclination of the heavy machine 1 is detected by b and the roll inclination sensor 4, and the inclination is canceled by these data to calculate the correct position and height.

Specifically, in FIG. 10, the center point (local board coordinates) G of the heavy machine 1, the GPS antenna 2a located above it, and the position of the GPS antenna 2b located behind it are recognized. Heavy equipment 1 from these positional relationships
Tilt in the front-back direction, that is, the pitch angle generated between the vertical line passing through the center point G of the heavy equipment 1 and the actual center line of the heavy equipment 1.
A is required.

On the other hand, the roll inclination sensor 4 determines the inclination of the heavy machine 1 in the left-right direction, that is, the roll angle B generated between the vertical line passing through the center point G and the actual center line of the heavy machine 1.

The correct position and height of the heavy equipment 1 are calculated by offsetting this inclination with the detected height of the local board. That is,
When the pitch angle A and the roll angle B have a predetermined relationship as shown in FIG. 10, the center point G of the heavy machine is expressed by the formula (X-x, Y).
-Y, Z-z). At this time, x, y,
Each z is obtained by executing the calculation formula shown in the following formula 1.

[0046]

[Formula 1]

These calculation formulas are programmed in the application installed in the vehicle-mounted control section 5. In this way, the center point G in consideration of the inclination, that is, the local board height coordinate can be obtained and displayed on the display unit 7a.

The operator who is on board the heavy equipment 1 is
Work on the cut embankment is performed based on the difference in height between the actual ground level and the planned ground level displayed in a.

In this way, it is possible to obtain the data on the position and height in the section to be leveled, so whether or not the ground is at the planned height during the leveling work, and to what extent. It is possible to display on the display unit 7 in real time whether or not.

FIG. 6 to FIG. 9 show a display in which such a function is further advanced. The area to be leveled is divided into squares (mesh) of a predetermined size, and the actual ground leveling is performed in units of these squares. It is to calculate the height. Further, the height difference between the actual ground level and the planned ground level is converted into a color difference and displayed on the display section 7a in units of these squares.

In FIG. 7, the interval between the squares is 0.25 m,
It can be set in four types of 0.5 m, 1 m, and 1.2 m, and the unevenness state (error) of the ground can be known by this area unit. The data on the uneven state of the ground are sequentially updated as the heavy equipment 1 travels. That is, in FIG. 7, the width W (variable setting) of the heavy machine 1 updates the data for a portion that passes over 80% (variable setting) of the grid width. The height difference between the tracks of the caterpillar 1a is calculated by proportionally dividing the number of squares by the horizontal distance between the tracks (FIG. 9).

The data obtained as described above is shown in FIG.
As shown in, the display is comprehensively displayed on the display unit 7a. The displayed contents are GPS data (latitude and longitude altitude), planned embankment amount (finally desired ground height), current embankment amount (ground height during construction), initial ground height (ground height before construction), rear of heavy equipment position. It is a figure, a heavy machine position side view, and a heavy machine position top view.

In the plan view of the position of the heavy equipment, squares are displayed, and the extent to which the current amount of embankment is in excess of the planned amount of embankment is displayed in the color of the squares. For example, the same height as the planned embankment amount is set to white, and when it is lower than this, it is displayed in red, and when it is higher than this, it is displayed in green. Any combination of these color-coding settings may be used as long as they are easy to see, and gradations may be displayed according to the degree of excess or deficiency.

As described above, in the present embodiment, the construction ground coordinates (X, Y, Z) of the heavy equipment can be corrected and calculated, and the height Z thereof is preset with a certain width (for example, the width of the heavy equipment). It is possible to update and add the real-time latest height for each construction management grid. As shown in FIG. 8, the height in the width W of the heavy equipment is constant and is the same as the height of the center point G, which is displayed in each square.

Further, before the construction, a ground survey is carried out by GPS to memorize the ground height of each square, and when the work is carried out, the construction ground height and the planned ground height which are updated in real time are calculated. By displaying the differences by color, it is possible to provide work form management information for construction up to the planned height. Therefore, the amount of cut embankment can be calculated by multiplying the difference between the original ground height and the construction ground height by the square area. By displaying this soil volume, it is possible to manage the real-time production volume (leveled soil volume).

On the other hand, when the heavy equipment 1 is unmanned, as shown in FIG.
As shown in 1, the base station 10 is installed adjacent to the section to be leveled. The base station 10 is packed with personnel who monitor the height distribution of the ground level (not shown).

As described above, the reference station 10 is provided with the personal computer as the central control unit 6 wirelessly data-linked to the vehicle-mounted control unit 5 and other equipment, and the central control unit 6 is provided with: A communication interface 11 for wireless data link is connected.

A display unit 7b similar to that mounted on the heavy equipment 1 is connected to the central control unit 6. Heavy machinery 1
In the case where is unmanned, various operations of the heavy equipment 1 are remotely controlled through a TV camera or a remote control device (not shown).

In the present embodiment, the construction ground coordinates (X, Y, Z) of the heavy equipment can be corrected and calculated, and the height Z of the construction management grid is preset with a certain fixed width (for example, the width of the heavy equipment). Each time, it can be updated and given with the latest height in real time. In addition, before the construction, a ground survey is carried out by GPS to store the ground height of each square, and the height difference between the construction ground and the planned ground height that is updated in real time when the work is carried out is calculated. By displaying by color, it is possible to provide work management information for construction up to the planned height.

In this way, the amount of cut embankment can be calculated by multiplying the difference between the original ground height before construction and the construction ground height by the square area. By displaying the volume of soil on the display units 7a and 7b, it is possible to manage the real-time production volume (the amount of cut and filled soil). (Other Embodiments) In the above embodiment, the heavy equipment 1
Although the two GPS antennas 2a and 2b are provided in the present embodiment, in this embodiment, the roll angle sensor 4 is not provided, and one more GPS antenna 2c is added. As shown in FIG. 12, GPS antennas 2 a and 2 b are arranged in parallel along the front-rear direction of the heavy equipment 1. Also,
The GPS which is orthogonal to the front-back direction of the heavy equipment 1 and is installed in parallel.
Another GP is placed on a straight line passing through the installation positions of the antennas 2a and 2b.
An S antenna 2c is provided.

In this way, the inclination of the heavy machine 1 in the left-right direction can be detected by using the GPS antennas 2a and 2c, so that it is not necessary to install a roll angle sensor. The inclination in the left-right direction detected by these, that is, the roll angle is used when calculating the absolute position of the heavy machine 1 as in the above-described embodiment. The other configurations are the same as those in the above-described embodiment, and thus the description thereof will be omitted.

[0062]

According to the present invention, the absolute height of a heavy machine in which the tilt component of the heavy machine is canceled is calculated based on the signals from the GPS antenna and the roll tilt sensor, and the actual ground level and the planned ground level are calculated. Since it was configured to calculate the difference from the height and display the amount of earth and mound to be cut or cut on the display unit, the construction accuracy of leveled ground can be accurately and easily measured in real time even during construction. You can manage this.

Furthermore, since the required amount of earth and sand can be easily obtained during the ground leveling work, the work can be performed extremely efficiently without being interrupted as in the conventional case.

[Brief description of drawings]

FIG. 1 is a view showing a heavy machine in an earthwork construction surface measuring apparatus of the present invention.

FIG. 2 is a schematic diagram showing an installation state of a GPS antenna adopting a GPS kinematic method.

FIG. 3 is a block diagram of the earthworking surface measuring device of the present invention.

FIG. 4 is a diagram for explaining the principle of height correction of the heavy equipment in the front-rear direction.

FIG. 5 is a diagram for explaining the principle of horizontal height correction of heavy equipment.

FIG. 6 is a diagram showing display contents of a display unit in the earthworking construction surface measuring apparatus.

FIG. 7 is a plan view showing a state in which a section to be leveled in the earthworking surface measuring apparatus is divided into squares having predetermined dimensions.

FIG. 8 is a rear view showing the relationship between the heavy equipment and the construction surface height for each square.

FIG. 9 is a diagram showing a method of displaying the construction surface height for each grid.

FIG. 10 is a principle diagram showing a method for calculating the local board coordinates after correction by the inclination of the heavy machine based on the pitch angle and the roll angle.

FIG. 11 is a diagram showing an overall outline when a base station is installed.

FIG. 12 is a diagram showing a case where three GPS antennas are mounted on a heavy machine.

[Explanation of symbols]

1 heavy machinery 2a, 2b, 2c, 21 GPS antenna 4-roll tilt sensor 5 In-vehicle control unit 6 Central control unit 7a, 7b Display section 10 base stations 20 fixed stations

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuhide Ishida             2-10-26 Fujimi, Chiyoda-ku, Tokyo             Within Ta Construction Industry Co., Ltd. (72) Inventor Shinji Kawamoto             2-10-26 Fujimi, Chiyoda-ku, Tokyo             Within Ta Construction Industry Co., Ltd. (72) Inventor Kensuke Higuchi             2-10-26 Fujimi, Chiyoda-ku, Tokyo             Within Ta Construction Industry Co., Ltd. F-term (reference) 2D015 HA03 HB05

Claims (6)

[Claims] 1. A device for measuring the plane accuracy of a cut embankment carried out in a section to be leveled, wherein a heavy machine for leveling the cut embankment and at least two of the heavy machines arranged in parallel in the front-rear direction. The GPS antenna, the roll tilt sensor for detecting the roll attitude of the heavy machine, the vehicle-mounted control unit to which the signals from the GPS antenna and the roll tilt sensor are input, and information based on the input signal are displayed. A display unit is provided, and the vehicle-mounted control unit detects a tilt component of the heavy machine based on signals from the GPS antenna and the roll tilt sensor, and calculates an absolute height of the heavy machine that cancels the tilt component, An earthworking construction surface measuring device, characterized in that a height difference between an actual ground level and a planned ground level is calculated and the height difference is displayed on the display unit. 2. A device for measuring the plane accuracy of a cut embankment carried out in a section to be leveled, which is a heavy machine for leveling the cut embankment and at least three GPs provided on the heavy machine.
An S antenna, a vehicle-mounted control unit to which signals from these GPS antennas are input, and a display unit that displays information based on the input signals are provided, and at least the GPS antenna is provided along the front-rear direction of the heavy machine. Two GPS antennas are installed side by side, are orthogonal to the front-rear direction of the heavy machine, and other GPS antennas are provided on a straight line that passes through the installation position of the GPS antennas installed side by side. The tilt component of the heavy equipment is detected based on the signal from the GPS antenna, and the absolute height of the heavy equipment is calculated by canceling this tilt component to calculate the height difference between the actual ground level and the planned ground level. A measuring device for an earthwork construction surface, wherein the height difference is displayed on the display unit. 3. A central control unit wirelessly linked to the on-vehicle control unit is provided, and the central control unit detects the tilt component of the heavy machine based on signals from the GPS antennas and / or roll tilt sensors. And calculating the absolute height of the heavy machine that offsets the inclination component, calculating the height difference between the actual ground level and the planned ground level, and displaying this level difference on the display unit. The measuring device for earthwork construction surface according to 1 or 2. 4. The area to be ground leveled is divided into squares of a predetermined size, and the height difference between the actual ground level and the planned ground level is calculated in units of these grids, and this is displayed on the display unit. The measuring device for earthwork construction surface according to any one of claims 1 to 3. 5. The earthwork according to claim 4, wherein the height difference between the actual ground level and the planned ground level is converted into a color difference and displayed on the display unit in the unit of squares. Measuring device for construction surface. 6. The amount of cut embankment is calculated by multiplying the height difference between the original ground surface before construction and the actual ground level by the square area,
The earthworking surface measuring apparatus according to claim 1, wherein the amount of soil is displayed on the display unit.