Distance correction device

Abstract

To provide a distance correction device which prevents human errors such as forgetting to press a reset button (ACK button) of a distance meter or timing deviation, improves accuracy of work (ACK work) of adjusting a distance measured by the distance meter to the distance at a measurement point, and can form a road surface with a highly accurate waveform as designed.SOLUTION: A distance correction device 10 comprises a traveling mechanism 12 that travels a construction machine 11, a distance meter 18 that measures a traveling distance, a screed mechanism 20 that includes a plurality of divided screed plates 22 that spreads asphalt mixture 60 evenly along a corrugated road surface 54 and an elevating unit 23 that raises and lowers each screed plate 22, and a camera 26 that takes images of measurement points. A control unit 30 determines a measurement point from the image taken by the camera 26, and when the distance correction device 10 coincides with the measurement point, it adjusts the distance measured by the distance meter 18 to the distance to a measurement point Pn.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a distance correction device for spreading and leveling an asphalt mixture on a road surface. [Background technology]

[0002] Conventionally, there is known a paving and leveling device called a country finisher (a type of asphalt finisher) that continuously paves a specially wavy road surface. The country finisher's screed device has multiple screed plates divided in the vehicle width direction, connected by connecting pins, and adjacent screed plates rotate around the connecting pins, thereby deforming into a designed wave shape at each measurement point spaced apart on the roadway. The specially wavy road surface is formed by paving the asphalt mixture while continuously deforming the shape of the screed plates of the country finisher's screed device. A country finisher equipped with such a screed device is known (Patent Document 1).

[0003] The country finisher of Patent Document 1 includes a screeding device that includes a traveling vehicle equipped with a hopper device, a delivery device, and a spreading device, an outrigger device that holds the screeding device at a predetermined height, multiple screed plate devices, a compaction device, and a main frame for holding each of these devices. It also includes an automatic control device for the height of the outrigger devices, an attack angle adjustment device that positions the entire screeding device at a predetermined appropriate angle relative to the direction of travel of the underlying road surface, and a control device that controls each screed plate device and compaction device.

[0004] Normally, a country finisher is equipped with a distance meter (rotary encoder), and the shape of the screed plate is deformed so that it becomes the design shape at the measurement point corresponding to the distance measured by the distance meter.Since an error occurs in the distance measured by the distance meter, every time the country finisher's screed device passes a measurement point, the reset button (ack button, acknowledge button) on the distance meter is pressed to adjust the distance measured by the distance meter to the distance at the measurement point (ack operation), and the measured distance is corrected.

[0005] However, simply providing a rangefinder on the country finisher of Patent Document 1 requires the operator to manually press the reset button to adjust the distance measured by the rangefinder to the distance at the measurement point (acknowledgment work), which carries the risk of human error such as forgetting to press the button or being off-timing, making it difficult to reproduce the corrugated road surface as designed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-269816 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above, the present invention aims to provide a distance correction device that prevents human errors such as forgetting to press the reset button (ACK button) of the rangefinder or timing errors, improves the accuracy of the work of adjusting the distance measured by the rangefinder to the distance at the measurement point (ACK work), and can form a road surface with a highly accurate waveform as designed. [Means for solving the problem]

[0008] According to an embodiment of the present invention, there is provided a distance correction device for use in a construction machine for constructing a road surface, comprising: measurement points are provided on the road surface at predetermined intervals along the traveling direction, The construction machine is characterized by comprising: a main body of the construction machine; a traveling mechanism provided on the construction machine to cause the construction machine to travel; a rangefinder provided on the traveling mechanism to measure the traveled distance; a construction device provided on the construction machine to work the road surface; a detection means provided on the construction machine to detect the measurement point; and a control unit that determines the measurement point from information detected by the detection means, and when the distance correction device coincides with the measurement point, adjusts the distance measured by the rangefinder to the distance of the measurement point.

[0009] According to this configuration, the distance correction device comprises a construction machine as the main body, a traveling mechanism attached to the construction machine and causing the construction machine to travel, a distance meter attached to the traveling mechanism and measuring the traveling distance, a construction device attached to the construction machine and constructing the road surface, and a control unit. The control unit has detection means attached to the construction machine and detects the measurement point, and locates the measurement point from the information detected by the detection means, and when the distance correction device matches the measurement point, adjusts the distance measured by the distance meter to the distance at the measurement point. This prevents human error such as forgetting to press the button or timing error, improves the accuracy of the work of adjusting the distance measured by the distance meter to the distance at the measurement point (ack work), and makes it possible to form a road surface with a highly accurate waveform as designed.

[0010] Preferably, the distance correction device for spreading and leveling an asphalt mixture on a corrugated road surface comprises: measurement points are provided on the road surface at predetermined intervals along the traveling direction, The device is characterized by comprising a construction machine as the main body, a traveling mechanism attached to the construction machine to travel the construction machine, a rangefinder attached to the traveling mechanism to measure the traveling distance, a screed mechanism attached to the construction machine and including a plurality of divided screed plates that spread the asphalt mixture evenly along the corrugated road surface and a lifting unit that raises and lowers each of the screed plates, a camera attached to the construction machine to take an image of the measurement point, and a control unit that determines the measurement point from the image taken by the camera and, when the distance correction device coincides with the measurement point, adjusts the distance measured by the rangefinder to the distance of the measurement point.

[0011] According to this configuration, the distance correction device includes a traveling mechanism for traveling the construction machine, a distance meter for measuring the traveling distance, a screed mechanism including a plurality of divided screed plates for spreading the asphalt mixture along the corrugated road surface and an elevating unit for raising and lowering each screed plate, a camera for taking images of the measurement point, and a control unit. The control unit determines the measurement point from the image taken by the camera and adjusts the distance measured by the distance meter to the distance at the measurement point when the distance correction device coincides with the measurement point (when the distance correction device passes the measurement point). This prevents human error such as forgetting to press the button or timing error, improves the accuracy of the work of adjusting the distance measured by the distance meter to the distance at the measurement point (acknowledgement work), and makes it possible to form a highly accurate corrugated road surface as designed.

[0012] Preferably, the distance correction device for spreading and leveling an asphalt mixture on a corrugated road surface comprises: measurement points are provided on the road surface at predetermined intervals along the traveling direction, The device comprises a construction machine as the main body, a traveling mechanism attached to the construction machine and causing the construction machine to travel, a rangefinder attached to the traveling mechanism and measuring the traveled distance, a screed mechanism attached to the construction machine and including a plurality of divided screed plates that spread the asphalt mixture evenly along the corrugated road surface and a lifting unit that raises and lowers each of the screed plates, a laser emitter that emits laser light, and a control unit that has map information in which the road surface and the measurement point are recorded, and that determines the position of the distance correction device by shining the laser light at a station that serves as a reference position located outside the road surface, and that adjusts the distance measured by the rangefinder to the distance of the measurement point when the position of the measurement point in the map information matches the position of the distance correction device.

[0013] According to this configuration, the distance correction device includes a traveling mechanism for traveling the construction machine, a distance meter for measuring the traveling distance, a screed mechanism including a plurality of divided screed plates for spreading the asphalt mixture along the corrugated road surface and an elevating unit for raising and lowering each screed plate, a laser emitter for emitting a laser beam, and a control unit. The control unit has map information recording the road surface and measurement points, and determines the position of the distance correction device by shining a laser beam at a station serving as a reference position located outside the road surface. When the position of the measurement point on the map information matches the position of the distance correction device (when the distance correction device passes the measurement point), the control unit adjusts the distance measured by the distance meter to the distance at the measurement point. This prevents human error such as forgetting to press the button or timing error, improves the accuracy of the work of adjusting the distance measured by the distance meter to the distance at the measurement point (acknowledgement work), and enables the formation of a highly accurate corrugated road surface as designed.

[0014] Preferably, the control unit operates the screed mechanism based on the travel distance measured by the distance meter to adjust the height of the screed plate.

[0015] With this configuration, the control unit operates the screed mechanism to adjust the height of the screed plate based on the traveled distance measured by the rangefinder, which not only improves the accuracy of the work of adjusting the distance measured by the rangefinder to the distance at the measurement point (ack work), but also makes it possible to form a more accurate wavy road surface by automatically operating the screed mechanism.

[0016] Preferably, the control unit notifies the operator of the distance correction device via a notification device when the position of the measurement point based on the distance traveled measured by the rangefinder does not match the position of the measurement point determined using the camera or the laser emitter.

[0017] With this configuration, if the position of the measurement point based on the distance traveled measured by the rangefinder does not match the position of the measurement point determined using a camera or laser emitter, the control unit will notify the operator by using a notification device to sound a buzzer or light up a lamp, indicating that there is a discrepancy between the measured position and the actual position of the measurement point, making it easier to make subsequent corrections and allowing the formation of a road surface with a highly accurate waveform as designed. [Effects of the Invention]

[0018] It is possible to provide a distance correction device that prevents human errors such as forgetting to press the reset button (ACK button) of the rangefinder or timing errors, improves the accuracy of the work (ACK work) of adjusting the distance measured by the rangefinder to the distance at the measurement point, and can form a road surface with a highly accurate waveform as designed. [Brief explanation of the drawings]

[0019] [Figure 1] Fig. 1(A) is an explanatory diagram of an example of a corrugated road surface paved by a distance correction device of an embodiment. Fig. 1(B) is a cross-sectional view of the road surface of the shape of (A) taken along line BB. Fig. 1(C) is a cross-sectional view of the road surface of the shape of (A) taken along line CC. Fig. 1(D) is a cross-sectional view of the road surface of the shape of (A) taken along line DD. [Figure 2] FIG. 2 is a side view of the distance correction device according to the embodiment. [Figure 3] FIG. 2 is a rear view of the distance correction device according to the embodiment. [Figure 4] Fig. 4(A) is a diagram showing the operation of the screed mechanism of the embodiment, and Fig. 4(B) is an enlarged view of the main part of Fig. 4(A). [Figure 5] Fig. 5(A) is a flow chart illustrating the operation of the distance correction device according to the embodiment, and Fig. 5(B) is a flow chart illustrating the operation of a distance correction device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings, which show a distance correction device conceptually (schematically). [Example]

[0021] An example of a corrugated road surface 54 of a road 50 paved by a distance correction device (construction machine, asphalt finisher, country finisher) 10 will be described. As shown in Figure 1(A), the track 50 is a type of automobile test course known as a country road (rough road), and is made up of straight sections in plan view. In some cases, shoulders 53 are formed on the sides of the straight sections.

[0022] Track 50 has measurement points at predetermined intervals along the direction of travel, for example, the measurement points are arranged in order as P1, P2, P3, ..., Pn. Track 50 is formed so that the waveform gradually changes depending on the position of the measurement points.

[0023] As shown in FIG. 1(B), in the cross section of the road 50 at measurement point P1, the corrugated road surface 54 has one convex portion formed near the road shoulder 53, and the outer side is flat.

[0024] As shown in Figure 1(C), in the cross section of the roadway 50 at measurement point P3, the corrugated road surface 54 has two small continuous convex portions formed from the end of the road shoulder 53, and a larger convex portion formed further outward.

[0025] As shown in Figure 1(D), in the cross section of the roadway 50 at measurement point P5, the corrugated road surface 54 is flat near the road shoulder 53, with a convex portion formed outside of that, and multiple small convex portions formed continuously further outward.

[0026] In this way, the corrugated road surface (wave-shaped road surface) 54 is designed in advance so that the waveform gradually changes at each of the measurement points P1, P2, P3, ..., Pn. For this reason, in order for the distance correction device 10 to spread and level the asphalt mixture 60 (see Figure 4) to the designed waveform, it is necessary to accurately grasp and align the positions of the measurement points P1, P2, P3, ..., Pn.

[0027] Next, the distance correction device 10 according to the embodiment will be described. As shown in Figures 2 and 3, the distance correction device 10, also known as a country finisher, is a construction machine that spreads and levels an asphalt mixture 60 on a corrugated road surface 54. The distance correction device 10 includes a construction machine 11 as its main body, a traveling mechanism (wheels, crawlers) 12 that drives the construction machine 11, a distance meter 18 that measures the traveling distance and is attached to the traveling mechanism 12, a driver's seat 13 where an operator can drive and perform various operations, a hopper 14 into which a heated asphalt mixture 60 made by mixing asphalt with aggregate such as crushed stone or sand is poured from a dump truck, and a bar feeder that transports the poured asphalt mixture 60 to the rear of the vehicle. Note that, although the distance correction device 10 is a country finisher in the embodiment, it is not limited to this and may be another construction machine, such as an asphalt finisher.

[0028] The distance correction device 10 also includes a screw 16 that is installed behind the construction machine 11 and spreads the asphalt mixture 60 along a waveform to the paving width, a tamper that is installed behind the screw 16 and compacts the asphalt mixture 60, a leveling arm 21 that is installed on the construction machine 11 so as to be angle adjustable and extends rearward, a screed mechanism 20 that is installed on the leveling arm 21 and spreads the compacted asphalt mixture 60 evenly, and an outrigger mechanism 25 that holds the screed mechanism 20 at a predetermined height. Note that the cylinder 21a is a pivot cylinder, and the cylinder 21b is a cylinder that raises and lowers the leveling arm 21.

[0029] The distance correction device 10 also includes a camera 26 as a detection means installed on the construction machine 11 for capturing images of measurement points P1, P2, P3, ....Pn, and a control unit 30 that uses image processing to determine measurement points P1, P2, P3, ....Pn from the images captured by this camera 26, and when the distance correction device 10 matches measurement points P1, P2, P3, ....Pn, adjusts (acknowledges, approves) the distance measured by the rangefinder 18 to the distance of measurement points P1, P2, P3, ....Pn.

[0030] Next, the screed mechanism 20 will be described. As shown in Figures 4(A) and 4(B), the screed mechanism 20 is provided on the construction machine 11 and includes a plurality of divided screed plates 22 that are used to spread the asphalt mixture 60 along the corrugated road surface 54, and an elevator 23 that raises and lowers each screed plate 22. Adjacent screed plates 22 are connected by connecting pins 22a, and by rotating around the connecting pins 22a, the screed plates 22 can be deformed into the waveform shapes designed for each of measurement points P1, P2, P3, ... Pn that are provided at intervals on the roadway 50.

[0031] The control unit 30 operates the screed mechanism 20 based on the travel distance measured by the distance meter 18 to adjust the height of each screed plate 22. Furthermore, if the positions of measurement points P1, P2, P3, .... Pn based on the travel distance measured by the distance meter 18 do not match the positions of measurement points P1, P2, P3, .... Pn determined using the camera 26, the control unit 30 notifies the operator of the distance correction device 10 via a notification device 33. The notification device 33 can be, for example, a buzzer that notifies the operator by sound, or a lamp that can be lit or flashed to notify the operator by light.

[0032] Next, the operation of the distance correction device 10 using the camera 26 will be described. As shown in FIG. 5(A), the distance correction device 10 uses the camera 26 to capture images of the area in front of or around the vehicle while traveling (STEP 1; in the figure, STEP is abbreviated as S). The control unit 30 processes the captured camera image to determine measurement points P1, P2, P3, . . . Pn (STEP 2), and then adjusts the distances measured by the rangefinder 18 to the distances of measurement points P1, P2, P3, . . . Pn (the ACK button is automatically turned ON) (STEP 3). This improves the accuracy of the process of adjusting the distances measured by the rangefinder 18 to the distances of measurement points P1, P2, P3, . . . Pn (the ACK process), making it possible to form a highly accurate, designed waveform road surface 54 (see FIG. 4).

[0033] Next, a description will be given of another embodiment of the distance correction device 10. Note that components similar to those of the distance correction device 10 described above will be assigned reference numerals in the drawings and description thereof will be omitted.

[0034] 1 to 3, station 70, which serves as a reference position, is located outside track 50. Distance correction device 10 is provided with laser emitter 31, which is provided above driver's seat 13 and serves as detection means for emitting laser light, and direction adjustment unit 32, which automatically adjusts the direction of laser emitter 31. Direction adjustment unit 32 allows the laser light from laser emitter 31 to follow station 70 even when distance correction device 10 moves.

[0035] The control unit 30 has map information on the wavy road surface 54 and measurement points P1, P2, P3, ... Pn recorded therein, and determines the position of the distance correction device 10 by shining a laser beam at a station 70 that serves as a reference position located outside the road surface 54, and when the positions of the measurement points P1, P2, P3, ... Pn in the map information match the position of the distance correction device 10, it adjusts the distance measured by the rangefinder 18 to the distance of measurement points P1, P2, P3, ... Pn.

[0036] Next, the operation of the distance correction device 10 using the laser emitter 31 will be described. As shown in FIG. 5(B), distance correction device 10 emits a laser beam from laser emitter 31 toward station 70 while traveling (STEP 4). Control unit 30 receives the laser beam at station 70 and recognizes the position of distance correction device 10 (STEP 5). The distance measured by rangefinder 18 is adjusted to the distances of measurement points P1, P2, P3, . . . Pn in accordance with the map information (the ACK button is automatically turned ON) (STEP 6). This improves the accuracy of the adjustment of the distance measured by rangefinder 18 to the distances of measurement points P1, P2, P3, . . . Pn (the ACK operation), making it possible to form a highly accurate, corrugated road surface 54 (see FIG. 4) as designed.

[0037] Next, the effects of the distance correction device 10 of the embodiment described above will be explained. In an embodiment of the present invention, the distance correction device 10 comprises a construction machine 11 as the main body, a traveling mechanism 12 that is attached to the construction machine 11 and causes the construction machine 11 to travel, a distance meter 18 that is attached to the traveling mechanism 12 and measures the traveled distance, a construction device 20 that is attached to the construction machine 11 and constructs the road surface, and a control unit 30. The control unit 30 detects detection means 26, 31 that are attached to the construction machine 11 and detects the measurement point, and locates the measurement point from information detected by the detection means 26, 31. When the distance correction device 10 matches the measurement point, it adjusts the distance measured by the distance meter to the distance at the measurement point. This prevents human errors such as forgetting to press the button or timing errors, improves the accuracy of the work of adjusting the distance measured by the distance meter to the distance at the measurement point (acknowledgement work), and makes it possible to form a road surface with a highly accurate waveform as designed.

[0038] Furthermore, the distance correction device 10 is equipped with a camera 26, and the control unit 30 determines the measurement points P1, P2, P3, ... Pn from the image taken by the camera 26, and when the distance correction device 10 coincides with the measurement point P1, P2, P3, ... Pn (when the distance correction device 10 passes the measurement point), it adjusts the distance measured by the rangefinder 18 to the distance of the measurement point P1, P2, P3, ... Pn. This prevents human errors such as forgetting to press the button or timing errors, and improves the accuracy of the task of adjusting the distance measured by the rangefinder 18 to the distance of the measurement point P1, P2, P3, ... Pn (acknowledgement task), making it possible to form a highly accurate wavy road surface 54 as designed.

[0039] Furthermore, the distance correction device 10 is equipped with a laser emitter 31 and a direction adjustment unit 32, and the control unit 30 has map information in which the road surface 54 and measurement points P1, P2, P3, ....Pn are recorded, and the position of the distance correction device 10 is determined by shining a laser beam at a station 70 which serves as a reference position located outside the road surface 54. When the position of measurement points P1, P2, P3, ....Pn in the map information matches the position of the distance correction device 10 (the distance correction device 10 passes a measurement point), the distance measured by the rangefinder 18 is adjusted to the distance of measurement points P1, P2, P3, ....Pn. This prevents human errors such as forgetting to press the button or timing errors, and improves the accuracy of the task of adjusting the distance measured by the rangefinder 18 to the distance of measurement points P1, P2, P3, ....Pn (acknowledgement task), making it possible to form a road surface 54 with a highly accurate waveform as designed.

[0040] Furthermore, the control unit 30 operates the screed mechanism 20 to adjust the height of the screed plate 22 based on the traveled distance measured by the distance meter 18, which not only improves the accuracy of the work (ack work) of adjusting the distance measured by the distance meter 18 to the distance of measurement points P1, P2, P3, ... Pn, but also automatically operates the screed mechanism 20, making it possible to form a more accurate wavy road surface 54.

[0041] Furthermore, if the position of measurement points P1, P2, P3, .... Pn based on the distance traveled measured by the rangefinder 18 does not match the position of measurement points P1, P2, P3, .... Pn determined using the camera 26 or laser emitter 31, the control unit 30 will notify the operator by sounding a buzzer or lighting a lamp via the notification device 33, indicating that there is a discrepancy between the measured position and the actual position of measurement points P1, P2, P3, .... Pn, making it easier to make subsequent corrections and allowing the formation of a highly accurate waveform road surface 54 as designed.

[0042] In the embodiment, the control unit 30 adjusted the distance measured by the rangefinder 18 to the distance of the measurement points P1, P2, P3, .... Pn at the positions of the measurement points P1, P2, P3, .... Pn, but this is not limited to this. The control unit 30 may detect the timing of the operation (acknowledgement operation) of adjusting the distance measured by the rangefinder 18 to the distance of the measurement points P1, P2, P3, .... Pn, and send a signal to the rangefinder 18 to adjust the distance measured by the rangefinder 18 to the distance of the measurement points P1, P2, P3, .... Pn (press the acknowledgment button), for example, every 1 meter.

[0043] Furthermore, in the embodiment, the control unit 30 notifies the operator by lighting a buzzer or lamp using the notification device 33 when there is a discrepancy between the measured position and the actual positions of the measurement points P1, P2, P3, ....Pn, but this is not limited to this, and the traveling mechanism 12 may be stopped when there is a discrepancy between the measured position and the actual positions of the measurement points P1, P2, P3, ....Pn.

[0044] That is, the present invention is not limited to the examples as long as the functions and effects of the present invention are exhibited. [Industrial Applicability]

[0045] The technology of the present invention is suitable for a distance correction device that spreads and levels an asphalt mixture on a corrugated road surface. [Explanation of symbols]

[0046] 10... Distance correction device (asphalt finisher, country finisher, construction machinery) 11... Construction machinery (main body, tractor) 12... Traveling mechanism (wheels, crawlers) 13... Driver's seat 18... Distance meter (rotary encoder) 20...Screed mechanism 22...Screed plate 23... Lifting section 26... Detection method (camera, AI camera) 30... Control section 31... Detection means (laser emitter) 32… Direction adjustment section 33... Notification device (buzzer, lamp) 50... Course 60... Asphalt mixture 70... Station

Claims

1. A distance correction device used in a construction machine that constructs a road surface, measurement points are provided on the road surface at predetermined intervals along the traveling direction, A distance correction device characterized by comprising: a construction machine as a main body; a traveling mechanism provided on the construction machine to cause the construction machine to travel; a rangefinder provided on the traveling mechanism to measure the distance traveled; a construction device provided on the construction machine to work the road surface; a detection means provided on the construction machine to detect the measurement point; and a control unit that determines the measurement point from information detected by the detection means, and when the distance correction device coincides with the measurement point, adjusts the distance measured by the rangefinder to the distance of the measurement point.

2. 2. The distance correction device according to claim 1, The distance correction device is used to spread and level an asphalt mixture on a corrugated road surface, The construction device is a screed mechanism that is provided on the construction machine and includes a plurality of divided screed plates that spread the asphalt mixture along the corrugated road surface, and an elevating unit that elevates each of the screed plates, the detection means is a camera provided on the construction machine for capturing an image of the measurement point, The control unit determines the measurement point from the image taken by the camera, and when the distance correction device coincides with the measurement point, adjusts the distance measured by the rangefinder to the distance of the measurement point.

3. 2. The distance correction device according to claim 1, The distance correction device is used to spread and level an asphalt mixture on a corrugated road surface, The construction device is a screed mechanism that is provided on the construction machine and includes a plurality of divided screed plates that spread the asphalt mixture along the corrugated road surface, and an elevating unit that elevates each of the screed plates, the detection means includes a laser emitter that emits laser light, The control unit has map information in which the road surface and the measurement point are recorded, and determines the position of the distance correction device by shining the laser light at a station that serves as a reference position located outside the road surface, and when the position of the measurement point in the map information matches the position of the distance correction device, adjusts the distance measured by the rangefinder to the distance of the measurement point.

4. 4. The distance correction device according to claim 2 or 3, The distance correction device is characterized in that the control unit operates the screed mechanism based on the travel distance measured by the distance meter to adjust the height of the screed plate.

5. 4. The distance correction device according to claim 2 or 3, a distance correction device, characterized in that the control unit notifies an operator of the distance correction device by a notification device when the position of the measurement point based on the travel distance measured by the rangefinder does not match the position of the measurement point determined using the camera or the laser emitter.

Images