A precise control method for cut angles and lengths considering the unevenness of the tunnel face

Abstract

The present invention relates to the technical field of cut hole measurement, and specifically to a precise control method for cut angles and lengths considering the unevenness of the heading face, including determining the tunneling parameters of the expected cut holes and the expected horizontal line of the heading face; obtaining the positions of the actual cut holes; obtaining the angles between the actual cut holes and the actual heading face, the lengths of the actual cut holes from the center line of the tunnel excavation direction, and the cut lengths of the actual cut holes. Through data processing by the data processing module, the above data is processed and analyzed, thereby realizing precise control of cut angles and lengths considering the unevenness of the heading face. By using the present invention, the cost of tunnel construction by the drill and blast method can be reduced and the efficiency can be increased, with remarkable economic and social benefits, and it has strong popularization and application value.

Description

Technical Field

[0001] The present invention relates to the technical field of cut hole measurement, and particularly to a precise control method for cut angles and lengths considering the unevenness of the tunnel face. Background Technique

[0002] In tunnel excavation projects, cut blasting is an important link to ensure the excavation quality and progress of the tunnel. The angles and depths of cut holes directly affect the subsequent blasting effect.

[0003] However, in actual construction, the tunnel face may not be perpendicular to the tunnel side line. Due to the influence of the previous blasting, the tunnel face may be inclined, that is, the tunnel face is uneven. At this time, using the original planned cut hole drilling scheme will result in different depths and angles at the bottoms of the cut holes on both sides, affecting the blasting effect and excavation quality. Currently, most of the existing cut blasting methods are based on a tunnel face perpendicular to the tunnel side line, that is, it is considered that the tunnel face is a relatively flat plane, without actually considering the unevenness of the tunnel face. The adaptability and control accuracy for an uneven tunnel face are limited, thus affecting the blasting effect. Summary of the Invention

[0004] The present invention provides a precise control method for cut angles and lengths considering the unevenness of the tunnel face, and precisely controls the cut angles and lengths for the situation where the tunnel face is not perpendicular to the tunnel side line.

[0005] The technical solution of the present invention is as follows:

[0006] A precise control method for cut angles and lengths considering the unevenness of the tunnel face specifically includes the following steps:

[0007] S1. Based on the tunnel geological exploration data and the geological prediction information of the actual tunnel face, parametric design is carried out on the cut area of the actual tunnel face to determine the driving parameters of the expected cut holes and the expected tunnel face horizontal line LY.

[0008] The expected cut holes are wedge-shaped cuts, including an expected first cut hole and an expected second cut hole located in the same plane, and the two cut holes are at the same horizontal level.

[0009] The driving parameters of the expected cut holes and the expected tunnel face horizontal line LY include the expected cut length L TC , and the angle between the axis of the expected cut hole and the expected tunnel face horizontal line LY is θ;

[0010] S2. At a preset support distance L3 in front of the actual tunnel face, install a support and level it. The support is located on the center line LK of the tunnel excavation direction. Install a laser rangefinder and a data processing module on the support, and the top height is flush with the axis of the expected cut hole.

[0011] S3. By using a laser rangefinder, obtain the distances L1 and L2 from the actual tunnel face to the laser rangefinder at the intersection points M and N of the actual tunnel face with the side tunnel boundary lines LB on both sides, and perform dot positioning on M and N; obtain the horizontal distance L4 from the laser rangefinder to the side tunnel boundary lines LB on both sides, and perform dot positioning on the horizontal intersection points O1 and O2 of the laser rangefinder with the side tunnel boundary lines LB on both sides.

[0012] S4. Extend the axis of the expected cut hole, and obtain the position of the actual cut hole at the intersection point with the actual tunnel face.

[0013] S5. Input the tunneling parameters of the expected cut hole and the expected tunnel face horizontal line LY, as well as the position of the actual cut hole, into the data processing module; obtain the angle between the actual cut hole and the actual tunnel face, the length of the actual cut hole from the center line LK of the tunnel excavation direction, and the cut length of the actual cut hole.

[0014] The actual cut hole is a wedge-shaped cut, including an actual first cut hole and an actual second cut hole located in the same plane, and the two cut holes are in the same horizontal plane.

[0015] In S5, the angle between the actual cut hole and the actual tunnel face is obtained by the following formula:

[0016] x1 = θ - γ = θ - arctan(L5 / 2L4),

[0017] x2 = θ + γ = θ + arctan(L5 / 2L4),

[0018] where x1 and x2 are the included angles between the axes of the actual first cut hole and the actual second cut hole and the actual tunnel face respectively; γ is the angle of ∠MNJ after drawing a perpendicular line NJ from N to the side tunnel boundary line LB on the other side; the distance between M and N in the tunneling direction is L5.

[0019] In S5, the intersection point of the center line LK of the tunnel excavation direction and MN is G, and the lengths of the actual cut holes from the center line LK of the tunnel excavation direction are the lengths of the line segments formed by the actual first cut hole orifice and the actual second cut hole orifice and G, and are obtained by the following formula:

[0020] L 11 = [sin(90° - θ) / sin(θ - arctan(L2cosβ - L1cosα) / 2L4)] · [L TC sinθ + (L6 / 2)tanθ - L7],

[0021] L 12 = [sin(90° - θ) / sin(θ + arctan(L2cosβ - L1cosα) / 2L4)] · [L TC sinθ + (L6 / 2)tanθ - L7], where L11 and L 12 are respectively the lengths of the actual first cut hole and the actual second cut hole at the opening positions from the center line LK of the tunnel excavation direction; taking the position where the laser rangefinder is located as point O, the angles between the lines ON and OM and the center line LK of the tunnel excavation direction are α and β; the distance between the bottoms of the expected cut holes is L6; the intersection point of MN and the center line LK of the tunnel excavation direction is G, and the length of OG is L7.

[0022] In S5, the cut length of the actual cut hole is obtained by the following formula:

[0023] L TC1= [sin(90° + arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ - arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ,

[0024] L TC2= [sin(90° - arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ + arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ,

[0025] wherein, L TC1 and L TC2 are respectively the cut lengths of the actual first cut hole and the actual second cut hole.

[0026] The specific derivation steps of the length of L7 are as follows:

[0027] L7 = GU = OG - OU,

[0028] where OG is the preset support distance L3 from the laser rangefinder to the heading face, and OU is the distance from the laser rangefinder to the expected horizontal line LY of the heading face.

[0029] A spirit level bubble is provided in the support for leveling.

[0030] Angle scales are provided on the support.

[0031] The data processing module includes a processor and a memory. The processor is electrically connected to the memory, and a computer program is stored in the memory.

[0032] The laser rangefinder is electrically connected to the processor.

[0033] The processor executes the computer program stored in the memory.

[0034] Through the above technical solutions, the present invention has the following beneficial effects:

[0035] 1. By using the present invention, the bottom positions of the cut holes can be at the same depth and the angles can be the same, avoiding the situation that the tunneling size of the heading face is different after blasting, resulting in the inclination of the heading face, and improving the blasting effect.

[0036] 2. The operation is simple and fast, with fewer measuring points to be positioned, improving the construction operation efficiency.

[0037] 3. It has strong applicability. The distance between the laser rangefinder and the heading face can be arbitrarily selected and is not affected by the inclination degree of the heading face.

[0038] 4. It can effectively reduce the rework rate, reduce the material waste and rework cost during the construction process, and shorten the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In the drawings:

[0040] Figure 1 is a schematic diagram of the layout of the calculation points of the present invention;

[0041] Figure 2 is a schematic diagram of the calculated length of the present invention;

[0042] Figure 3 is a schematic diagram of the comparison before and after the cut holes of the present invention;

[0043] Figure 4 is a data collection and processing flow chart of the present invention;

[0044] Figure 5 is an overall flow chart of the present invention.

[0045] The components represented by the reference numerals in the drawings are:

[0046] 1. Laser rangefinder; 2. Bracket; 21. Level bubble; 22. Angle scale; 3. Data processing module; 31. Processor; 32. Memory; 4. Tunnel side line LB; 5. Tunnel excavation direction center line LK; 6. Expected heading face horizontal line LY; 7. Actual heading face horizontal line LS; 8. Actual heading face; 9. Expected cut hole; 10. Actual cut hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] Embodiment 1

[0048] Referring to Figure 5 , a method for accurately controlling the cut angle and length considering the unevenness of the heading face according to the present invention specifically includes the following steps:

[0049] S1. Based on the tunnel geological exploration data and the geological prediction information of the actual heading face 8, parametric design is carried out on the cut area of the actual heading face 8 to determine the driving parameters of the expected cut holes 9 and the expected heading face horizontal line LY6.

[0050] The expected cut holes 9 are wedge-shaped cuts, including the expected first cut hole and the expected second cut hole located in the same plane, and the two cut holes are on the same horizontal plane.

[0051] The driving parameters of the expected cut holes 9 and the expected heading face horizontal line LY6 include the expected cut length L TC , and the included angle between the axis of the expected cut hole 9 and the expected heading face horizontal line LY6 is θ.

[0052] Through parametric design, the position, length and angle of the expected cut holes 9 can be accurately controlled, thus improving the accuracy and efficiency of cutting.

[0053] Adapting to complex geological conditions, combining the tunnel geological exploration data and the geological prediction information of the actual heading face 8, adaptive design can be carried out for different geological conditions to ensure the safety and effectiveness of the cutting operation.

[0054] Refer to Figure 4 , and a spirit level bubble 21 is provided in the support 2 for leveling. The spirit level bubble 21 is used to ensure that the support 2 is in a horizontal state, which is the basis for precise control of the cutting operation. Only when the support 2 is stable and horizontal can the subsequent measurement and control of the cutting angle and length be accurate.

[0055] An angle scale 22 is provided on the support 2. The angle scale 22 allows the operator to directly read the included angle between the marking point and the reference line, thus ensuring precise control of the cutting angle. This is crucial for achieving the expected cutting effect and controlling the tunneling direction.

[0056] The data processing module 3 includes a processor 31 and a memory 32. The processor 31 is electrically connected to the memory 32, and a computer program is stored in the memory 32. The laser rangefinder 1 is electrically connected to the processor 31. The data processing module 3 is the core of the scheme, responsible for processing and analyzing the data from the laser rangefinder 1 and executing the computer program stored in the memory 32. This configuration can efficiently process data and quickly respond to operation instructions, thus realizing real-time and precise control of the cutting angle and length.

[0057] The processor 31 executes the computer program stored in the memory 32.

[0058] The stored computer programs contain the algorithms and logic required to achieve precise control of the cut angle and length. These programs can instruct the processor to perform the necessary calculations and control operations to ensure the accuracy and efficiency of the cutting operation. The laser rangefinder 1 is used to measure the actual length and position information of the cut holes in real time and transmit this data to the processor 31. The processor 31 adjusts the cutting operation based on this data to ensure precise control of the cut length. This real-time feedback mechanism improves the accuracy and reliability of the cutting operation.

[0059] S2. At a preset support distance L3 directly in front of the actual tunnel face 8, install the support 2 and level it. And the support 2 is located on the center line LK5 of the tunnel excavation direction. Install the laser rangefinder 1 and the data processing module 3 on the support 2, and the top height is flush with the axis of the expected cut hole 9.

[0060] Ensure that the position of the support 2 matches the actual requirements of the cutting operation, providing an accurate reference for subsequent control of the cut angle and length. The leveling operation of the support 2 ensures its stability during the operation, which is crucial for the stable operation of the laser rangefinder 1 and the data processing module 3, helping to reduce measurement errors and control deviations. The data processing module 3 is directly connected to the laser rangefinder 1 and can receive and process measurement data in real time, so as to quickly adjust the cutting operation parameters and improve the operation efficiency and accuracy.

[0061] S3. Through the laser rangefinder 1, obtain the distances L1 and L2 from the actual tunnel face 8 to the intersection points M and N of the two side tunnel sidelines LB4, and mark points on M and N for positioning; obtain the horizontal distance L4 from the laser rangefinder to the two side tunnel sidelines LB4, and mark points on the horizontal intersection points O1 and O2 of the laser rangefinder to the two side tunnel sidelines LB4 for positioning.

[0062] The laser rangefinder 1 can measure distances with high precision, so the positioning of the intersection points M and N is very accurate. This is crucial for subsequent determination of the position and angle of the cut holes, helping to ensure that the cutting operation is carried out in the correct direction. Among them, the line segment O1O2 is perpendicular to the tunnel sideline LB4. Marking points for positioning makes the intersection points M and N clearly marked on the tunnel site, facilitating the operator to intuitively understand the position and angle requirements of the cut holes. The positioning points of O1 and O2 can be used as reference points for subsequent measurement and verification to ensure that the cutting operation meets the design requirements.

[0063] S4. Extend the axis of the expected cut hole 9 to obtain the position of the actual cut hole 10 at the intersection with the actual tunnel face 8.

[0064] In order to ensure that the depth and angle of the cut hole drilling are the same even when the actual tunnel face 8 is inclined, the relative position of the actual cut hole 10 needs to remain unchanged. The point position on the side that needs to be extended is the opening position of the cut hole on that side, and only that side needs to be extended while the other side is shortened.

[0065] S5. Input the tunneling parameters of the expected cut holes 9 and the expected face horizontal line LY6, as well as the position of the actual cut hole 10 into the data processing module 3; obtain the angle between the actual cut hole 10 and the actual face 8, the length of the actual cut hole 10 from the center line LK5 of the tunnel excavation direction, and the cut length of the actual cut hole 10.

[0066] Reference Figure 3 , and the specific reasoning process of the data processing module 3 includes:

[0067] At point N, draw a horizontal line, and the intersection point with the other side tunnel side line LB4 is J. NJ intersects OM at point H and the tunnel excavation direction center line LK5 at point R. Let the angle ∠MNJ be γ and the angle ∠NMH be δ. Then the length of MG, L5 = MO2 - NO1 = L2cosβ - L1cosα;

[0068] From tanγ = MJ / NJ = L5 / 2L4, we can obtain γ = arctan(L5 / 2L4);

[0069] The intersection points of the expected face horizontal line LY6 and the tunnel side line LB4 are C and D. The expected face horizontal line LY6 is perpendicular to the tunnel side line LB4; the expected cut holes 9 are EP1 and FQ1, and the expected length is L TC , the angle is θ, and they are in a symmetric state. The distance between the hole bottoms E and F is L6, and EF intersects the tunnel excavation direction center line LK5 at point T. Let the extended lines of the line segments EP1 and FQ1 intersect at point W;

[0070] Since the current actual face horizontal line LS7 is not perpendicular to the tunnel side line LB4 and is inclined, the actual cut holes 10 should be set as EP2 and FQ2, and their lengths are L TC1 , L TC2 ; where P2 and Q2 are the intersection points of the extended lines of EP1 and FQ1 with NM respectively. Draw a perpendicular line from P2 to the tunnel side line LB4 and intersect it at point S. Then the angle ∠EP2M is ∠EP2S - ∠MP2S = θ - γ. Similarly, the angle ∠FQ2N is = θ + γ;

[0071] Combined with Figures 1 to 3 , draw a perpendicular line from P1 to the tunnel excavation direction center line LK5 and intersect it at point U. The length of the line segment GU, L7, is a known value determined by the position of the expected face horizontal line LY6; since ∠WEF = ∠WP2S, the length of the line segment WT, L8, is (L6 / 2)tanθ, and the length of the line segment WE, L9, is (L6 / 2) / cosθ. Then from △WP1U, the length of the line segment WU, L 10 The length is L TC sinθ + (L6 / 2)tanθ, WG = WU - GU = L 10 - L7;

[0072] In △P2WG, the angle ∠P2WG is 90° - θ, the angle ∠WGP2 is 90° + γ, and let the length of the line segment P2G be L 11 , and the length of the line segment EP2 is L TC1 , according to the sine theorem:

[0073] sin(θ - γ) / (L 10 - L7) = sin(90° - θ) / L 11 = sin(90° + γ) / (L TC1 + L9),

[0074] From this, it can be obtained that:

[0075] L 11 = [sin(90° - θ) / sin(θ - γ)]·(L 10 - L7),

[0076] L TC1= = [sin(90° + γ) / sin(θ - γ)]·(L 10 - L7) - L9;

[0077] Similarly, in △Q2WG, let the length of the line segment Q2G be L 11 , according to the sine theorem, it can be obtained that:

[0078] sin(θ + γ) / (L 10 - L7) = sin(90° - θ) / L 12 = sin(90° - γ) / (L TC2 + L9),

[0079] From this, it can be obtained that: L 12 = [sin(90° - θ) / sin(θ + γ)]·(L 10 - L7),

[0080] L TC2 = [sin(90° - γ) / sin(θ + γ)]·(L 10 - L7) - L9;

[0081] The actual cut hole 10 is a wedge cut, including an actual first cut hole and an actual second cut hole in the same plane, and the two cut holes are on the same horizontal plane.

[0082] The angle between the actual cut hole 10 and the actual tunnel face 8 is obtained by the following formula:

[0083] x1 = θ - γ = θ - arctan(L5 / 2L4),

[0084] x2 = θ + γ = θ + arctan(L5 / 2L4),

[0085] where x1 and x2 are the angles between the axes of the actual first cut hole and the actual second cut hole and the actual tunnel face 8 respectively; γ is the angle of ∠MNJ after drawing a perpendicular line NJ from N to the other side tunnel side line LB4; the distance between M and N in the driving direction is L5.

[0086] The intersection point of the tunnel excavation direction center line LK5 and MN is G. The lengths of the actual cut holes 10 from the tunnel excavation direction center line LK5 are the lengths of the line segments formed by the actual first cut hole orifice and the actual second cut hole orifice and G, and are obtained by the following formula:

[0087] L 11 = [sin(90° - θ) / sin(θ - arctan((L2cosβ - L1cosα) / 2L4))] · [L TC sinθ + (L6 / 2)tanθ - L7],

[0088] L 12 = [sin(90° - θ) / sin(θ + arctan((L2cosβ - L1cosα) / 2L4))] · [L TC sinθ + (L6 / 2)tanθ - L7],

[0089] where L 11 and L 12 are the lengths of the actual first cut hole and the actual second cut hole from the tunnel excavation direction center line LK5 at the opening respectively; taking the position of the laser rangefinder 1 as point O, the angles between the lines ON and OM and the tunnel excavation direction center line LK5 are α and β; the distance between the bottoms of the holes of the expected cut hole 9 is L6; the intersection point of MN and the tunnel excavation direction center line LK5 is G, and the length of OG is L7.

[0090] The specific derivation steps of the length of L7 are as follows:

[0091] L7 = GU = OG - OU,

[0092] where OG is the preset support distance L3 from the laser rangefinder 1 to the tunnel face, and OU is the distance from the laser rangefinder 1 to the expected tunnel face horizontal line LY6.

[0093] The cut length of the actual cut hole 10 is obtained by the following formula:

[0094] L TC1= [sin(90° + arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ - arctan((L2cosβ - L1cosα) / 2L4))] · [L TCsinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ,

[0095] L TC2= [sin(90° - arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ + arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ,

[0096] Among them, L TC1 and L TC2 are respectively the cut lengths of the actual first cut hole and the actual second cut hole.

[0097] The bottom positions of the 10 actual cut holes are at the same depth, and the angles between the axes of the 10 actual cut holes and the expected face are the same, avoiding the situation that the driving dimensions of the actual face 8 are different after blasting, resulting in the inclination of the actual face 8, and improving the blasting effect.

Claims

1. A precise control method for cut angles and lengths considering the unevenness of the tunnel face, characterized in that Specifically, it includes the following steps: S1. Based on the tunnel geological exploration data and the geological prediction information of the actual heading face (8), parametric design is carried out on the cut area of the actual heading face (8) to determine the driving parameters of the expected cut holes (9) and the expected heading face horizontal line LY (6). The expected cut holes (9) are wedge-shaped cuts, including an expected first cut hole and an expected second cut hole in the same plane, and the two cut holes are on the same horizontal plane. The tunneling parameters of the expected cut holes (9) and the expected heading face horizontal line LY (6) include the expected cut length L TC , and the included angle between the axis of the expected cut holes (9) and the expected heading face horizontal line LY (6) is θ; S2. At a preset support distance L3 in front of the actual heading face (8), install the support (2) and level it. And the support (2) is located on the tunnel excavation direction center line LK (5). Install the laser rangefinder (1) and the data processing module (3) on the support (2), and the top height is flush with the axis of the expected cut hole (9). S3. Through the laser rangefinder (1), obtain the distances L1 and L2 from the intersection points M and N of the actual heading face (8) and the two side tunnel sidelines LB (4) to the laser rangefinder (1), and carry out dot positioning on M and N; obtain the horizontal distances L4 from the laser rangefinder to the two side tunnel sidelines LB (4), and carry out dot positioning on the horizontal intersection points O1 and O2 of the laser rangefinder to the two side tunnel sidelines LB (4). S4. Extend the axis of the expected cut hole (9), and the intersection point with the actual heading face (8) to obtain the position of the actual cut hole (10). S5. Input the driving parameters of the expected cut holes (9) and the expected heading face horizontal line LY (6), and the position of the actual cut hole (10) into the data processing module (3); obtain the angle between the actual cut hole (10) and the actual heading face (8). x1 = θ - γ = θ - arctan(L5 / 2L4), x2 = θ + γ = θ + arctan(L5 / 2L4), where x1 and x2 are the included angles between the axes of the actual first cut hole and the actual second cut hole and the actual heading face (8) respectively; γ is the angle of ∠MNJ after drawing a perpendicular line NJ from N to the other side tunnel sideline LB (4); the distance between M and N in the driving direction is L5. The length of the actual cut hole (10) from the tunnel excavation direction center line LK (5), and the cut length of the actual cut hole (10). L TC1= [sin(90° + arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ - arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ, L TC2= [sin(90° - arctan((L2cosβ - L1cosα) / 2L4)) / sin(θ + arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7] - (L6 / 2) / cosθ, where L TC1 and L TC2 are the cut lengths of the actual first cut hole and the actual second cut hole, respectively; The actual cut hole (10) is a wedge-shaped cut, including an actual first cut hole and an actual second cut hole in the same plane, and the two cut holes are on the same horizontal plane.

2. The control method according to claim 1, wherein In S5, the intersection point of the tunnel excavation direction center line LK (5) and MN is G, and the lengths of the actual cut hole (10) from the tunnel excavation direction center line LK (5) are the line segment lengths formed by the actual first cut hole orifice and the actual second cut hole orifice and G, and are obtained by the following formula: L 11 = [sin(90° - θ) / sin(θ - arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7], L 12 = [sin(90° - θ) / sin(θ + arctan((L2cosβ - L1cosα) / 2L4))]·[L TC sinθ + (L6 / 2)tanθ - L7], Among them, L 11 and L 12 are respectively the lengths of the actual first cut hole and the actual second cut hole at the opening positions from the center line LK(5) of the tunnel excavation direction; taking the position where the laser rangefinder (1) is located as point O, the angles between the ON and OM lines and the center line LK(5) of the tunnel excavation direction are α and β; the distance between the bottoms of the holes of the expected cut holes (9) is L6; the intersection point of MN and the center line LK(5) of the tunnel excavation direction is G, and the length of OG is L7.

3. The control method according to claim 2, characterized in that, The specific derivation steps of the length of L7 are: L7 = GU = OG - OU, where OG is the preset support distance L3 from the laser rangefinder (1) to the heading face, and OU is the distance from the laser rangefinder (1) to the expected heading face horizontal line LY (6).

4. The control method according to claim 1, wherein A spirit level bubble (21) is provided in the support (2) for leveling.

5. The control method according to claim 1, wherein An angle scale (22) is provided on the support (2).

6. The control method according to claim 1, wherein The data processing module (3) includes a processor (31) and a memory (32). The processor (31) is electrically connected to the memory (32), and a computer program is stored in the memory (32).

7. The control method according to claim 1, characterized in that The laser rangefinder (1) is electrically connected to the processor (31).

8. The control method according to claim 6, characterized in that The processor (31) executes the computer program stored in the memory (32).

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