Measurement receiving system based on laser

Abstract

The invention relates to a measurement receiving system based on laser. The measurement receiving system comprises an adjustable receiving device used for fixedly arranging a receiving target in a reserved hole of a measured floor of a building; the laser plumb instrument is used for emitting laser beams vertically and upwards; the environment monitoring module is used for acquiring environment parameters; the positioning analysis module is used for determining the relative offset of the point position when the laser beam is projected to the receiving target according to the environmental parameters; and the correction output module is used for adjusting the point position projected on the receiving target according to the relative offset. The influence of external environmental factors on point location projection measurement is considered, the relative offset of the point location when the laser beam is projected to the receiving target is determined according to the related environmental data by monitoring the related environment of the building, and the point location projected to the receiving target is adjusted to overcome the offset of the point location projected to the receiving target, so that the accuracy of point location projection measurement is improved. And the accuracy of guiding and measuring the control axis of the building to the upper layer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building measurement, and in particular to a laser-based measurement receiving system. Background Art

[0002] One of the key tasks in surveying and constructing multi-story or high-rise main structural engineering projects is accurately projecting the building's control axis to the upper floors and controlling vertical deviation to ensure that the deviation from the control axis meets the error requirements specified in the specifications. Internal control methods are often used for vertical transfer surveying of control axes in multi-story or high-rise buildings. Typically, a laser plummet or total station is used to project the points onto the work surface. Rectangular holes are reserved in the floor slab to allow for vertical projection, and receiving targets are then placed on these holes to facilitate marking the projected points.

[0003] In order to ensure the accuracy of receiving the target projection and measurement points, the existing technologies mostly improve the accuracy of axis guidance by innovative improvements to the receiving device, and rarely consider the impact of environmental factors on the projection and measurement points.

[0004] For example, Chinese patent publication number CN208458737U discloses an axis measuring instrument for construction, including a measuring instrument body, wherein the two ruler sides of the measuring instrument body are respectively provided with a first opening and a second opening, and the first opening and the second opening are respectively provided with a first slider and a second slider on one side, and the first slider and the second slider are both provided with a slot on one side, and the first slider and the second slider are both provided with an oblique surface on the other side, and a hollow column and a support column are rotatably connected to the two oblique surfaces, and the middle of the inner wall of the two slots is provided with a butterfly screw passing through the top. The limiting structure ensures that the measuring instrument is fixed during use, thereby ensuring that the angle of the measuring instrument does not change and cause measurement errors. It can be seen that the existing technology prevents the angle of the measuring instrument from changing and causing measurement errors by adding a limiting structure to the measuring instrument, and does not take into account the impact of the environment on the measurement accuracy during the measurement process. Summary of the Invention

[0005] To this end, the present invention provides a laser-based measurement receiving system to overcome the problem in the prior art that the environment affects the measurement during the measurement process, thereby resulting in poor measurement accuracy.

[0006] To achieve the above object, the present invention provides a laser-based measurement receiving system, comprising:

[0007] An adjustable receiving device, wherein the adjustable receiving device is used to fix the receiving target in a reserved hole in the testing floor of the building;

[0008] A laser plumb line is provided below the adjustable receiving device, and is used to emit a laser beam vertically upward so that the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto a receiving target in the reserved holes in the measured floor slabs of the building;

[0009] An environmental monitoring module, connected to the laser plumb line, for acquiring environmental parameter data of a measurement location, wherein the environmental parameter data includes temperature data, wind data, humidity data, altitude data, and air pressure data;

[0010] a positioning analysis module connected to the environmental monitoring module, configured to determine a relative offset of a point position when the laser beam is projected onto the receiving target based on temperature data, wind data, humidity data, altitude data, and air pressure data, and to determine a maximum measurement deviation of a laser plumb bob based on a variation of the environmental parameter data;

[0011] The temperature data includes the temperature data of the tested floor and the air temperature data;

[0012] The wind data includes air density data, wind speed data and wind direction data at the location of the laser plumb line;

[0013] The humidity data includes relative humidity data in the reserved holes of the floor slabs of each floor of the building and relative humidity data between the floor slabs of each floor of the building;

[0014] The height data includes the height data of each floor of the building and the height data of the receiving target;

[0015] The air pressure data includes total air pressure data in the building;

[0016] The correction output module is connected to the positioning analysis module and is used to adjust the point where the laser beam is projected onto the receiving target according to the relative offset, and to determine the environmental data range for laser projection according to the maximum measurement deviation.

[0017] Furthermore, the adjustable receiving device includes a first L-shaped clip and a second L-shaped clip, and the first L-shaped clip and the second L-shaped clip are connected by an adjustable connecting rod, and the adjustable connecting rod includes a first adjustable connecting rod and a second adjustable connecting rod, and the first adjustable connecting rod includes an outer tube, a first connecting rod and a second connecting rod, one end of the first connecting rod and one end of the second connecting rod are respectively inserted into the outer tube from both ends of the outer tube and can be telescopically moved within the outer tube, the other end of the first connecting rod and the other end of the second connecting rod are respectively connected to the first L-shaped clip and the second L-shaped clip by a hinge, the outer tube is provided with a first bolt and a first screw hole for installing and fixing the receiving target, and the outer tube is provided with a second bolt and a second screw hole for adjusting and fixing the first connecting rod and the second connecting rod, and the structure of the second adjustable connecting rod is the same as that of the first adjustable connecting rod.

[0018] Furthermore, the relative offset includes a first relative offset, a second relative offset and a third relative offset. The positioning analysis module determines the deformation trend of the measured floor according to the temperature data of the measured floor, and obtains the first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the measured floor.

[0019] Furthermore, the positioning analysis module determines the deformation trend of the tested floor slab according to the temperature data of the tested floor slab, including:

[0020] A first deformation parameter is calculated based on the temperature data change trend of the tested floor slab, the first deformation parameter is compared with a preset deformation parameter, and the deformation trend of the tested floor slab is determined based on the comparison result. The deformation trend includes expansion of the tested floor slab, contraction of the tested floor slab, and constancy of the tested floor slab.

[0021] Furthermore, the positioning analysis module obtains a first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the tested floor, including:

[0022] If the deformation trend of the tested floor slab is expansion of the tested floor slab, the elongation of the tested floor slab in the length direction and the width direction is determined according to the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined according to the elongation of the tested floor slab in the length direction and the width direction;

[0023] Alternatively, if the deformation trend of the tested floor slab is shrinkage of the tested floor slab, the shrinkage amount of the tested floor slab in the length direction and the width direction is determined based on the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined based on the shrinkage amount in the length direction and the width direction of the tested floor slab;

[0024] Alternatively, if the deformation trend of the tested floor slab is constant, the first relative offset is determined according to an average slope of a temperature curve of the tested floor slab within a preset time period and a slope threshold.

[0025] Furthermore, the positioning analysis module determines the wind energy density based on the air density data and the wind speed data, determines the offset angle of the laser beam based on the wind energy density and angle curve, determines the offset direction of the laser beam based on the wind direction data, and determines the second relative offset based on the offset angle of the laser beam, the offset direction of the laser beam and the height data of the receiving target.

[0026] Furthermore, the positioning analysis module determines the third relative offset based on the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved holes of the floor slabs of each floor of the building, the relative humidity data between the floor slabs of each floor of the building, and the offset angle and offset direction of the laser beam.

[0027] Furthermore, the positioning analysis module calculates an environmental fluctuation parameter based on the variation amplitude of each environmental parameter data, and determines a maximum measurement deviation of the laser plumb line based on the environmental fluctuation parameter, wherein the environmental fluctuation parameter is determined according to the standard deviation of each environmental parameter data.

[0028] Furthermore, the correction output module determines a range coefficient according to the ratio of the maximum measurement deviation to the preset measurement deviation within a measurement cycle, and determines the environmental data range for laser projection based on the range coefficient.

[0029] Furthermore, the positioning analysis module determines the third relative offset based on the air refractive index between the floor slabs of each floor of the building, the air refractive index of the reserved holes of the floor slabs of each floor of the building, the height data of the reserved holes of the floor slabs of each floor of the building, the height data between the floor slabs of each floor of the building, the offset angle of the laser beam, and the offset direction of the laser beam.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The laser-based measurement and receiving system of the present invention takes into account the influence of external environmental factors on point measurement. By monitoring the relevant environment of the building, it obtains environmental parameter data when the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto the receiving target in the reserved holes of the measured floor slab of the building. According to the relevant environmental data, the relative offset of the point when the laser beam is projected onto the receiving target is determined, and the point projected onto the receiving target is adjusted according to the relative offset to offset the point offset projected onto the receiving target caused by external environmental factors, thereby improving the accuracy of the control axis of the building in measuring the upper floors.

[0032] Furthermore, the present invention designs an adjustable receiving device, and the L-shaped clip can enable the receiving device to be installed as a whole at the reserved hole of the floor, so that the receiving target fixed on the receiving device is located in the reserved hole of the floor and parallel to the floor surface. Since the first adjustable connecting rod and the second adjustable connecting rod are adjustable, they are hinged to the L-shaped clip through a hinge structure, that is, a telescopic movable design. Even in the face of irregular reserved holes, stable fixation can be achieved through adjustment, which is flexible and convenient, and effectively solves the problems of instability, displacement and height difference of the receiving target, thereby improving both measurement accuracy and work efficiency.

[0033] Furthermore, temperature fluctuations can cause floor materials to expand and contract, affecting the accuracy of the building's control axis when directed upward, resulting in errors. When the temperature rises, the floor materials expand; when the temperature drops, they contract. This expansion and contraction causes changes in the floor's dimensions, affecting the position of the directed control axis. Therefore, the present invention determines a first relative offset based on the temperature data of the tested floor. This offset is used to adjust or correct the point at which the laser beam is projected onto the receiving target within a pre-reserved hole in the building's tested floor. This offset offsets the thermal expansion and contraction of the floor materials caused by temperature fluctuations, which in turn causes the building's control axis to deviate when directed upward, thereby improving the accuracy of the directed measurement.

[0034] Furthermore, wind can cause the laser plumb line's laser beam to deflect, which can lead to inaccurate projected measurement points and affect measurement accuracy. Therefore, the present invention determines a second relative offset based on wind data at the laser plumb line's location. This second offset is used to adjust or correct the position of the laser beam projected onto a receiving target within a pre-set hole in the building's floor slab to offset wind-induced laser plumb line deviation, which in turn causes the building's control axis to deflect when projecting toward the upper floors, thereby improving measurement accuracy.

[0035] Furthermore, the present invention takes into account the structural characteristics of the high-rise main body of the construction project. In the optical path of the vertically upward emitted laser beam, the space path between the floor slabs of the building is taken as a separate research area, and the reserved holes of the floor slabs of the building are taken as another separate research area. Due to the structural differences between the space between the floor slabs of the building and the reserved holes of the floor slabs of the building, the humidity difference between the two is more obvious. When the laser beam passes through the reserved holes of the floor slabs of the building and is projected onto the receiving target in the reserved holes of the measured floor slab of the building, the humidity difference between the space between the floor slabs of the building and the reserved holes of the floor slabs of the building is caused. Laser light will refract when passing through the space between the floor slabs of each floor of a building and the contact surface between the reserved holes in the floor slabs of each floor of the building. Therefore, the present invention determines a third relative offset based on the relative humidity data in the reserved holes in the floor slabs of each floor of the building, the relative humidity data between the floor slabs of each floor of the building, the offset angle of the laser light beam, etc. The third offset is used to adjust or correct the point on the receiving target projected by the laser light beam into the reserved holes in the floor slabs of the building to be measured, so as to offset the humidity difference between the high-rise structures of the building, which causes the laser light to refract in the air and produce an optical path offset, thereby causing the control axis of the building to deviate when it is directed to the upper floors for measurement, thereby improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of the system of the present invention;

[0037] Figure 2 A top view of the adjustable receiving device of the present invention;

[0038] Figure 3 It is a front view of the adjustable receiving device of the present invention;

[0039] Figure 4 Schematic top view of the adjustable receiving device in use state 1 according to an embodiment of the present invention;

[0040] Figure 5 It is a front view schematic diagram of the adjustable receiving device in the first use state according to the embodiment of the present invention;

[0041] Figure 6 Schematic top view of the adjustable receiving device in the second usage state according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the upward measurement of the control axis of a high-rise building using the internal control method;

[0043] In the figure: 1. First L-shaped clip; 2. Second L-shaped clip; 3. First adjustable connecting rod; 4. Second adjustable connecting rod; 5. Outer tube; 6. First connecting rod; 7. Second connecting rod; 8. Hinge; 9. Receiving target; 10. First bolt; 11. Second bolt; 12. Laser plumb line; 13. Test floor; 14. Reserved hole; 15. Slider; 16. Control axis. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0045] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0046] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0047] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] See also Figure 1 As shown, a laser-based measurement receiving system includes:

[0049] An adjustable receiving device, wherein the adjustable receiving device is used to fix the receiving target in a reserved hole in the testing floor of the building;

[0050] A laser plumb line is provided below the adjustable receiving device, and is used to emit a laser beam vertically upward so that the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto a receiving target in the reserved holes in the measured floor slabs of the building;

[0051] An environmental monitoring module, connected to the laser plumb line, for acquiring environmental parameter data of a measurement location, wherein the environmental parameter data includes temperature data, wind data, humidity data, altitude data, and air pressure data;

[0052] a positioning analysis module connected to the environmental monitoring module, configured to determine a relative offset of a point position when the laser beam is projected onto the receiving target based on temperature data, wind data, humidity data, altitude data, and air pressure data, and to determine a maximum measurement deviation of a laser plumb bob based on a variation of the environmental parameter data;

[0053] The temperature data includes the temperature data of the tested floor and the air temperature data;

[0054] The wind data includes air density data, wind speed data and wind direction data at the location of the laser plumb line;

[0055] The humidity data includes relative humidity data in the reserved holes of the floor slabs of each floor of the building and relative humidity data between the floor slabs of each floor of the building;

[0056] The height data includes the height data of each floor of the building and the height data of the receiving target;

[0057] The air pressure data includes total air pressure data in the building;

[0058] The correction output module is connected to the positioning analysis module and is used to adjust the point where the laser beam is projected onto the receiving target according to the relative offset, and to determine the environmental data range for laser projection according to the maximum measurement deviation.

[0059] The laser-based measurement and receiving system of the present invention takes into account the influence of external environmental factors on point measurement. By monitoring the relevant environment of the building, it obtains environmental parameter data when the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto the receiving target in the reserved holes of the measured floor slab of the building. According to the relevant environmental data, the relative offset of the point when the laser beam is projected onto the receiving target is determined, and the point projected onto the receiving target is adjusted according to the relative offset to offset the point offset projected onto the receiving target caused by external environmental factors, thereby improving the accuracy of the control axis of the building in measuring the upper floors.

[0060] See also Figure 2-Figure 3As shown, the adjustable receiving device includes a first L-shaped clip 1 and a second L-shaped clip 2, and the first L-shaped clip 1 and the second L-shaped clip 2 are connected by an adjustable connecting rod, and the adjustable connecting rod includes a first adjustable connecting rod 3 and a second adjustable connecting rod 4, and the first adjustable connecting rod 3 includes an outer tube 5, a first connecting rod 6 and a second connecting rod 7, one end of the first connecting rod 6 and one end of the second connecting rod 3 are respectively inserted into the outer tube 5 from both ends of the outer tube 5 and can be telescopically moved in the outer tube 5, the other end of the first connecting rod 6 and the other end of the second connecting rod 7 are respectively connected to the first L-shaped clip 1 and the second L-shaped clip 2 through a hinge 8, the outer tube 5 is provided with a first bolt 10 and a first screw hole for installing and fixing the receiving target 9, and the outer tube 5 is provided with a second bolt 11 and a second screw hole for adjusting and fixing the first connecting rod 6 and the second connecting rod 7. The structure of the second adjustable connecting rod 4 is the same as that of the first adjustable connecting rod 3.

[0061] See also Figure 7 As shown, the vertical transmission measurement construction of the control axis 16 of the existing multi-story or high-rise building is often carried out by the internal control method, and the point is projected onto the working surface with a laser plumb line 12 or a total station. The rectangular reserved holes 14 required for the vertical projection are reserved on the surface of the measured floor 13, and then the receiving target 9 is placed thereon to facilitate marking the projected points. However, the reserved rectangular holes may be irregular in the actual construction process, and the construction floor surface is uneven. The receiving target 9 is placed on it and is not stable and is easily displaced when marking the projected points, thus resulting in low measurement efficiency. In addition, the receiving target 9 has a certain thickness (thickness is about 5mm), which is higher than the floor surface and has a height difference. If the projected points are to be measured on the floor surface with an ink line, it is also easy to produce a deviation phenomenon, resulting in repeated lead lines and reduced measurement accuracy.

[0062] To this end, the present invention designs an adjustable receiving device, see Figure 4-Figure 5 As shown, in this state, the reserved hole 14 is a regular rectangle. The L-shaped clip can make the receiving device as a whole be set up at the reserved hole 14 of the floor, so that the receiving target 9 fixed on the receiving device is located in the reserved hole 14 of the floor and parallel to the floor surface. Figure 6 As shown, in this state, the reserved hole 14 is irregular, but since the first adjustable connecting rod 3 and the second adjustable connecting rod 4 are adjustable, they are hinged to the L-shaped card strip through a hinge structure, that is, a telescopic movable design. Even in the face of irregular reserved holes 14, stable fixation can be achieved through adjustment, which is flexible and convenient, and effectively solves the problems of instability, displacement and height difference of the receiving target, thereby improving both measurement accuracy and work efficiency.

[0063] As an embodiment, the receiving target can also be installed and fixed by a sliding part, that is, a slider 15 is mounted on the outer tube 5 of the first adjustable connecting rod 3 and the second adjustable connecting rod 4, and the receiving target 9 is connected to the slider 15. If the position of the reserved hole 14 deviates, the position of the receiving target 9 can be adjusted by sliding.

[0064] As an implementation method, the adjustable receiving device has a length of 150 mm and a width of 100 mm. The length direction is adjustable and telescopic, with an adjustable range of 150-250 mm. The target plate of the receiving target is square and has a length of 100-200 mm, which meets the construction requirements.

[0065] Specifically, the relative offset includes a first relative offset, a second relative offset and a third relative offset. The positioning analysis module determines the deformation trend of the measured floor according to the temperature data of the measured floor, and obtains the first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the measured floor.

[0066] Temperature fluctuations cause floor materials to expand and contract, affecting the accuracy of the building's control axis when directed upward, resulting in errors. When the temperature rises, the floor materials expand; when the temperature drops, they contract. This expansion and contraction causes changes in the floor's dimensions, affecting the position of the directed control axis. Therefore, the present invention determines a first relative offset based on the temperature data of the tested floor. This offset is used to adjust or correct the position of the laser beam projected onto the receiving target within a pre-recorded hole in the building's tested floor. This offset offsets the expansion and contraction of the floor materials caused by temperature fluctuations, which in turn causes the building's control axis to deviate when directed upward, thereby improving the directed control accuracy.

[0067] The temperature data specifically refers to the temperature of the tested floor slab when the laser beam passes through the reserved holes of the floor slabs of each layer of the building and is projected onto the receiving target in the reserved holes of the tested floor slab of the building.

[0068] It is understandable that the area of the floor is usually large, and in order to measure the temperature of the floor, multiple temperature detection points or devices can be set on the floor, and the temperature data of the floor can be determined by taking the average value of measurements at multiple positions.

[0069] Specifically, the positioning analysis module determines the deformation trend of the tested floor slab based on the temperature data of the tested floor slab, including:

[0070] A first deformation parameter is calculated based on the temperature data change trend of the tested floor slab, the first deformation parameter is compared with a preset deformation parameter, and the deformation trend of the tested floor slab is determined based on the comparison result. The deformation trend includes expansion of the tested floor slab, contraction of the tested floor slab, and constancy of the tested floor slab.

[0071] It should be noted that both the first deformation parameter and the preset deformation parameter are range values. It is understood that the initial temperature of the floor slab is determined based on the average temperature measured at a standard temperature (25°C). The preset deformation parameter is determined based on the maximum temperature range within which the deformation conforms to the detection tolerance range.

[0072] It can be understood that the deformation trend represents the state of the tested floor when the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto the receiving target in the reserved holes in the tested floor slab of the building, whether it is in a thermal expansion state (the tested floor slab expands), a cold contraction state (the tested floor slab contracts) or a normal state (the tested floor slab remains constant).

[0073] As an implementation method, if the initial temperature of the floor is 20 degrees Celsius, when the temperature rises to 30 degrees Celsius, the floor will expand, and when the temperature drops to 10 degrees Celsius, the floor will shrink, then the preset deformation parameter is 10-30 degrees Celsius, if the temperature of the tested floor is between 10-30 degrees Celsius, such as 25 degrees Celsius, when the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto the receiving target in the reserved hole of the tested floor slab of the building, that is, the first deformation parameter is 20-25 degrees Celsius. Within the preset deformation parameter, the deformation trend of the tested floor is constant. If the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto the receiving target in the reserved hole of the tested floor slab of the building, the temperature of the tested floor slab is between 10-30 degrees Celsius, such as 25 degrees Celsius, that is, the first deformation parameter is 20-25 degrees Celsius. If the temperature of the tested floor slab is higher than 30 degrees Celsius, such as 35 degrees Celsius, when it hits the receiving target in the reserved hole of the tested floor slab, that is, the first deformation parameter is 20-35 degrees Celsius, and a partial range of the first deformation parameter is above the preset deformation parameter, then the deformation trend of the tested floor slab is expansion of the tested floor slab. If the temperature of the tested floor slab is lower than 10 degrees Celsius, such as 5 degrees Celsius, when the laser beam passes through the reserved holes of the floor slabs of each floor of the building and hits the receiving target in the reserved hole of the tested floor slab of the building, that is, the first deformation parameter is 20-5 degrees Celsius, and a partial range of the first deformation parameter is below the preset deformation parameter, then the deformation trend of the tested floor slab is contraction of the tested floor slab.

[0074] Specifically, the positioning analysis module obtains the first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the tested floor, including:

[0075] If the deformation trend of the tested floor slab is expansion of the tested floor slab, the elongation of the tested floor slab in the length direction and the width direction is determined according to the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined according to the elongation of the tested floor slab in the length direction and the width direction;

[0076] Alternatively, if the deformation trend of the tested floor slab is shrinkage of the tested floor slab, the shrinkage amount of the tested floor slab in the length direction and the width direction is determined based on the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined based on the shrinkage amount in the length direction and the width direction of the tested floor slab;

[0077] Alternatively, if the deformation trend of the tested floor slab is constant, the first relative offset is determined according to an average slope of a temperature curve of the tested floor slab within a preset time period and a slope threshold.

[0078] It can be understood that the first relative offset includes a numerical value and a direction, and its direction is always located within the measured floor surface.

[0079] The numerical value of the first offset can be regarded as that the deformation of the measured floor slab is uniform, and its volume expands or contracts uniformly during thermal expansion or cold contraction, which can be characterized as deformation of the measured floor slab in the length, width, and height directions. Since the control axis of the survey is carried out on the two-dimensional plane of the measured floor slab, the deformation in the height direction will not cause any impact. Therefore, only the deformation of the measured floor slab in the length and width directions is calculated, and then the first relative offset is obtained through the resultant vector.

[0080] The deformation of the tested floor slab in the length and width directions is calculated based on the thermal expansion coefficient of the floor slab material, the temperature change (the difference between the temperature data of the tested floor slab and the middle value of the preset deformation parameter) and the original size. Any algorithm in the existing technology in this field can be used, which falls within the scope of protection of the present invention.

[0081] As an implementation method, the elongation of the measured floor slab in the longitudinal direction is calculated as follows:

[0082] The elongation of the tested floor slab due to thermal expansion is mainly determined by the linear expansion coefficient of the tested floor slab material, and the calculation formula is:

[0083] ΔL=α·L0·ΔT

[0084] Wherein, ΔL is the elongation of the measured floor slab in the length direction, α is the linear expansion coefficient of the measured floor slab material, L0 is the original length of the measured floor slab, and ΔT is the temperature change, specifically the difference between the temperature data of the measured floor slab and the middle value of the preset deformation parameter.

[0085] The calculation process of the elongation ΔW in the width direction of the tested floor slab is the same as that of the elongation in the length direction, which will not be repeated here.

[0086] After calculating the elongation of the measured floor in the length and width directions, the resultant vector of the two is calculated, that is, the first relative offset of the point where the laser beam is projected onto the receiving target when the deformation trend of the measured floor is expansion of the measured floor.

[0087] When the deformation trend of the measured floor slab is the contraction of the measured floor slab, the calculation process of the contraction amount of the measured floor slab in the length direction and the width direction is similar to the above-mentioned elongation amount of the measured floor slab in the length direction and the width direction. After calculating the contraction amount of the measured floor slab in the length direction and the width direction, the resultant vector of the two is calculated, that is, the first relative offset of the laser beam projected to the point on the receiving target when the deformation trend of the measured floor slab is the contraction of the measured floor slab. The specific process will not be repeated here.

[0088] When the deformation trend of the tested floor slab is constant, it is necessary to determine whether the first relative offset needs to be calculated based on the rate of change of the tested floor slab temperature over a past period of time.

[0089] Specifically, the detection of temperature data of the present invention is real-time. A temperature curve can be drawn based on the temperature data of the tested floor in the past 30 minutes, and the average slope of the temperature curve can be calculated. The average slope of the temperature curve is compared with a preset slope threshold. If the average slope of the temperature curve is greater than the preset slope threshold, it is necessary to calculate according to the above-mentioned method of calculating the deformation of the tested floor and then determine the first relative offset. If the average slope of the temperature curve is less than or equal to the preset slope threshold, no calculation is required, that is, the first relative offset is zero.

[0090] Specifically, the positioning analysis module determines the wind energy density based on the air density data and wind speed data, determines the offset angle of the laser beam based on the wind energy density and angle curve, determines the offset direction of the laser beam based on the wind direction data, and determines the second relative offset based on the offset angle of the laser beam, the offset direction of the laser beam and the height data of the receiving target.

[0091] When using a laser plumb line to measure a point, it is necessary to emit a laser beam vertically upward and allow the laser beam to pass through the reserved holes in the floor slabs of each building and project onto a receiving target in the reserved holes in the building's measured floor slabs. Ensuring that the laser beam emitted by the laser plumb line is vertical is a necessary condition for ensuring accurate point reception and measurement. However, in the actual measurement process, due to the influence of the environment on the laser plumb line, specifically, the ambient wind can cause uneven air density, thereby causing the laser beam of the laser plumb line to deflect. The laser beam deflection can make the measured point inaccurate, affecting measurement accuracy. Therefore, the present invention determines a second relative offset based on wind data at the location of the laser plumb line. The second offset is used to adjust or correct the point on the receiving target projected onto the reserved holes in the building's measured floor slabs. This offset offsets the wind-induced deflection of the laser beam of the laser plumb line, thereby causing the control axis of the building to deflect when measuring upward, thereby improving measurement accuracy. It is understandable that the temperature change in the height direction between the laser plumb line and the measured floor can also affect the offset of the laser beam. At this time, since the temperature change in the height direction can be reflected by the air density and ambient wind, the second relative offset is determined by the wind data.

[0092] The wind data includes air density data, wind speed data and wind direction data at the location of the laser plumb line;

[0093] The wind energy density data can be calculated based on the air density data and wind speed data at the location of the laser plumb bob. The specific calculation formula is as follows:

[0094]

[0095] Where P is the wind energy density, ρ is the air density, and V is the wind speed.

[0096] Furthermore, the detection of air density data, wind speed data and wind direction data at the location of the laser plumb bob is all real-time.

[0097] After obtaining the wind energy density data of the laser plumb line at the location where the laser beam is located when passing through the reserved holes in the floor slabs of each floor of the building and projecting onto the receiving target in the reserved holes in the measured floor slab of the building, the offset angle of the laser beam is determined based on the wind energy density and angle curve. The angle curve can be obtained in advance based on experiments or historical data. For example, in the laboratory, the laser plumb line emits a laser beam vertically upward, and the offset angle of the laser beam is measured under different wind energy densities, and a wind energy density-offset angle curve is drawn. After obtaining the wind energy density data of the laser plumb line at the location where the laser beam is located when passing through the reserved holes in the floor slabs of each floor of the building and projecting onto the receiving target in the reserved holes in the measured floor slab of the building, the offset angle of the laser beam is obtained based on the calculated wind energy density data and the wind energy density-offset angle curve.

[0098] After the offset angle is determined, combined with the height data of the receiving target (specifically, the distance from the receiving target to the laser emission point of the laser plumb bob), according to the Pythagorean theorem, the height data of the receiving target is a right-angled side, and the angle between this right-angled side and the laser beam (hypotenuse) is the offset angle of the laser beam. According to trigonometric functions, the offset length of the laser beam on the receiving target (the other right-angled side) can be calculated, that is, the second relative offset. The direction of the second relative offset is opposite to the direction of the wind direction data.

[0099] Furthermore, if the wind speed data is zero, indicating that there is no wind, the second relative offset is zero.

[0100] Specifically, the positioning analysis module determines the third relative offset based on the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved holes of the floor slabs of each floor of the building, the relative humidity data between the floor slabs of each floor of the building, and the offset angle and offset direction of the laser beam.

[0101] It is understandable that the total air pressure data in the building can be calculated and determined by taking the average of the total pressure data of various areas in the building.

[0102] When using a laser plumb line to measure points, the laser beam must be emitted vertically upwards, passing through pre-set holes in the building's floor slabs and projected onto a receiving target within the pre-set holes in the building's measured floor. Maintaining the verticality of the laser beam is essential for accurate point reception and measurement. However, in actual measurement, the laser plumb line can be affected by the environment. Specifically, when the air is humid, the humidity differences between high-rise structures in a building project can cause the laser beam to refract in the air. This is primarily because humidity changes the air's refractive index, which in turn alters the laser's path and causes errors.

[0103] The present invention takes into account the structural characteristics of the high-rise main body of the construction project. In the optical path of the vertically upward emitted laser beam, the space path between the floor slabs of the building is taken as a separate research area, and the reserved holes of the floor slabs of the building are taken as another separate research area. Due to the structural differences between the space between the floor slabs of the building and the reserved holes of the floor slabs of the building, the humidity difference between the two is more obvious. When the laser beam passes through the reserved holes of the floor slabs of the building and is projected onto the receiving target in the reserved holes of the measured floor slab of the building, the humidity difference between the space between the floor slabs of the building and the reserved holes of the floor slabs of the building is caused by the laser beam. Refraction occurs when passing through the space between the floor slabs of each floor of the building and the contact surface between the reserved holes of the floor slabs of each floor of the building. Therefore, the present invention determines a third relative offset based on the relative humidity data in the reserved holes of the floor slabs of each floor of the building, the relative humidity data between the floor slabs of each floor of the building, the offset angle of the laser beam, etc., and adjusts or corrects the point on the receiving target in the reserved hole of the floor slab of the building to be measured by the third offset to offset the humidity difference between the high-rise main bodies of the construction project, which causes the laser to be refracted in the air and produces an optical path offset, and then causes the control axis of the building to be offset when it is measured to the upper floor, thereby improving the measurement accuracy.

[0104] Specifically, the air temperature data includes the average temperature data of the air between the floor slabs of each floor of the building and the air temperature data in the reserved holes of the floor slabs of each floor of the building. The saturated water vapor pressure between the floor slabs of each floor of the building is determined based on the average temperature data between the floor slabs of each floor of the building, and the saturated water vapor pressure of the reserved holes of the floor slabs of each floor of the building is determined based on the temperature data in the reserved holes of the floor slabs of each floor of the building.

[0105] When determining the third relative offset, the first step is to determine the saturated water vapor pressure between the floor slabs of the building and the saturated water vapor pressure in the reserved holes of the floor slabs of the building.

[0106] In one embodiment, assuming that a building has N floors, the average temperature data between the first floor and the second floor, the average temperature data between the second floor and the third floor, ..., and the average temperature data of the air between the N-1th floor and the Nth floor are detected respectively. The temperature data in the reserved holes of the first floor, the air temperature data in the reserved holes of the second floor, ..., and the temperature data in the reserved holes of the Nth floor are detected respectively. The saturated water vapor pressure between the first floor and the second floor, between the second floor and the third floor, ..., between the N-1th floor and the Nth floor, in the reserved holes of the first floor, in the reserved holes of the second floor, ..., and in the reserved holes of the Nth floor are calculated respectively:

[0107]

[0108] Among them, e s is the saturated water vapor pressure, T2 is the air temperature data. When calculating the saturated water vapor pressure between the floor slabs, T2 is the average air temperature data between the floor slabs. When calculating the saturated water vapor pressure in the reserved holes of the floor slabs, T2 is the air temperature data in each reserved hole.

[0109] Specifically, the air refractive index between the floor slabs of each floor of the building is determined based on the relative humidity data between the floor slabs of each floor of the building, the saturated water vapor pressure between the floor slabs of each floor of the building, and the total air pressure data in the building; the air refractive index of the reserved holes in the floor slabs of each floor of the building is determined based on the relative humidity data in the reserved holes in the floor slabs of each floor of the building, the saturated water vapor pressure of the reserved holes in the floor slabs of each floor of the building, and the total air pressure data in the building.

[0110] When determining the third relative offset, the second step is to determine the refractive index of air between the floor slabs of the building and the refractive index of air in the reserved holes of the floor slabs of the building.

[0111] After determining the saturated water vapor pressure between the floor slabs of the building and the saturated water vapor pressure in the reserved holes of the floor slabs of the building, the water vapor partial pressure between the floor slabs of the building and the water vapor partial pressure in the reserved holes of the floor slabs of the building can be determined based on the saturated water vapor pressure between the floor slabs of the building and the saturated water vapor pressure in the reserved holes of the floor slabs of the building:

[0112] e=RHe s

[0113] Wherein, RH is the relative humidity. For example, when calculating the water vapor partial pressure between the first floor slab and the second floor slab, RH is the relative humidity of the air between the first floor slab and the second floor slab. When calculating the water vapor partial pressure in the reserved holes of the first floor slab, RH is the relative humidity of the air in the reserved holes of the first floor slab. Similarly, the water vapor partial pressure between the floor slabs of each floor of the building and the water vapor partial pressure in the reserved holes of the floor slabs of each floor of the building are determined.

[0114] Afterwards, according to the following formula:

[0115]

[0116] Where n is the refractive index of air, A and B are constants, usually A = 77.6 × 10 -6 K / Pa, B=0.716×10 -6K / Pa, T is the absolute temperature, T=T2+273.15, unit K, P is the total air pressure in the building, e is the water vapor partial pressure, when calculating the air refractive index between the first floor slab and the second floor slab, e is the water vapor partial pressure between the first floor slab and the second floor slab, when calculating the air refractive index in the reserved holes of the first floor slab, e is the water vapor partial pressure in the reserved holes of the first floor slab, and so on, to determine the air refractive index between the floor slabs of each floor of the building and the air refractive index in the reserved holes of the floor slabs of each floor of the building.

[0117] Specifically, the third relative offset is determined based on the air refractive index between the floor slabs of each floor of the building, the air refractive index of the reserved holes of the floor slabs of each floor of the building, the height data of the reserved holes of the floor slabs of each floor of the building, the height data between the floor slabs of each floor of the building, the offset angle of the laser beam, and the offset direction of the laser beam.

[0118] Since no refraction occurs when the laser is vertically incident on air with different refractive indices, when the second relative offset is zero, that is, when the offset angle of the laser beam is zero, the third relative offset is also zero.

[0119] When determining the third relative offset, the third step is to determine when the offset angle of the laser beam is not zero, based on the air refractive index between the floor slabs of the building, the air refractive index of the reserved holes in the floor slabs of the building, the height data of the floor slabs of the building, the height data between the floor slabs of the building, the offset angle of the laser beam, and the offset direction of the laser beam.

[0120] In one embodiment, assume that the building has a total of N floors. At this time, the air refractive index between the floor slabs of the building has been determined (the first floor slab is the ground of the second floor / second floor, and the space between the floor slabs includes the ground and the first floor slab), the air refractive index of the reserved holes of the floor slabs of the building, the initial offset angle of the laser beam (i.e., the offset angle of the laser beam when determining the second relative offset), the height data of the reserved holes of the floor slabs of the building (i.e., the floor thickness), the height data between the floor slabs of the building, and the offset direction of the laser beam have been determined.

[0121] Calculate the refraction angle of the laser beam incident on the reserved hole of the first floor slab. At this time, the incident medium is the air between the ground and the first floor slab. The refraction medium is the air in the reserved hole of the first floor slab. The calculation formula is:

[0122] q1·sinθ1=q2·sinθ2

[0123] Where q1 is the refractive index of the incident medium (i.e., the refractive index of the air between the earth's surface and the first floor slab), q2 is the refractive index of the refractive medium (i.e., the refractive index of the air in the reserved hole of the first floor slab), θ1 is the incident angle (i.e., the initial deviation angle of the laser beam), and θ2 is the refractive angle (i.e., the refractive angle of the laser beam when it enters the reserved hole of the first floor slab).

[0124] After obtaining the refraction angle of the laser beam incident on the reserved hole of the first floor slab, based on the height of the reserved hole of the first floor slab, the offset of the laser beam within the reserved hole of the first floor slab can be calculated as: the height of the reserved hole of the first floor slab × (tanθ1-tanθ2).

[0125] Calculate the refraction angle of the laser beam when it enters the reserved hole in the first floor slab and enters the space between the first and second floors. In this case, the incident medium is the air in the reserved hole, and the refractive medium is the air between the first and second floors. The calculation formula is the same as above, where q1 is the refractive index of the incident medium (i.e., the refractive index of the air in the reserved hole in the first floor slab), q2 is the refractive index of the refractive medium (i.e., the refractive index of the air between the first and second floors), θ1 is the incident angle (i.e., the refractive angle of the laser beam when it enters the reserved hole in the first floor slab), and θ2 is the refractive angle (i.e., the refractive angle of the laser beam when it enters the space between the first and second floors). The offset of the laser beam between the first and second floors is: the height between the first and second floors × (tanθ1 - tanθ2).

[0126] Similarly, the offset between the floor slabs of each floor of the building and the offset within the reserved holes of the floor slabs of each floor are calculated, and the sum is used to obtain the third relative offset.

[0127] After determining the first relative offset, the second relative offset, and the third relative offset, the point where the laser beam is projected onto the receiving target is adjusted according to the first relative offset, the second relative offset, and the third relative offset.

[0128] Specifically, the present invention also includes calculating the environmental fluctuation parameter based on the change amplitude of each environmental parameter data through the positioning analysis module, and determining the maximum measurement deviation of the laser plumb line based on the environmental fluctuation parameter, wherein the environmental fluctuation parameter is determined according to the standard deviation of each environmental parameter data.

[0129] Taking air temperature data as an example, for the average air temperature data between the floors of a building, the variation range of the average air temperature between the floors of the building in the past hour is statistically calculated, that is, the standard deviation of the average air temperature between the floors of the building in the past hour. If there are N floors, there are N standard deviations. The mean of the N standard deviations is calculated as the environmental fluctuation parameter corresponding to the average air temperature data between the floors of the building.

[0130] Taking the wind speed data in the wind force data as an example, for the wind speed data at the location of the laser plumb line, the change amplitude of the wind speed data at the location of the laser plumb line in the past hour, that is, the standard deviation of the wind speed data at the location of the laser plumb line in the past hour, is statistically calculated as the environmental fluctuation parameter corresponding to the wind speed data.

[0131] An environmental fluctuation parameter-relative offset curve is drawn based on the environmental fluctuation parameters and relative offsets in the historical data, and the measurement deviation is determined based on the calculated environmental fluctuation parameters. It can be understood that the environmental fluctuation parameters are calculated based on the change amplitude of each environmental parameter data, and the environmental fluctuation parameters are calculated based on at least two parameter data in the environmental parameter data to determine at least two environmental fluctuation parameters, and at least two measurement deviations are determined based on the at least two environmental fluctuation parameters, and the maximum value of the at least two measurement deviations is taken as the maximum measurement deviation of the laser plumb line.

[0132] It can be understood that the above-mentioned maximum measurement deviation only takes the numerical value.

[0133] Specifically, the present invention also includes a correction output module determining a range coefficient based on the ratio of the maximum measurement deviation to the preset measurement deviation within a measurement cycle, and determining the environmental data range for laser projection based on the range coefficient. Laser projection refers to a laser plumb line emitting a laser beam vertically upward and allowing the laser beam to pass through the reserved holes in the floor slabs of each floor of the building and project onto a receiving target in the reserved holes in the measured floor slabs of the building.

[0134] As a specific implementation, it is assumed that the maximum measurement deviation is determined to be 15 mm and the preset measurement deviation is 9 mm. This indicates that according to historical data, based on the change amplitude of each environmental parameter data in the past hour, the maximum measurement deviation is greater than the preset measurement deviation. If the relative offset is continued to be determined and calculated under this condition, the relative offset is likely to exceed the preset measurement deviation. In this case, even if the relative offset is finally determined, a new error will be introduced in the calculation or adjustment process due to the large relative offset. Therefore, in this case, the range coefficient is determined to be 3 / 5=0.6, and the maximum and minimum values of the environmental parameters of the environmental fluctuation parameters in the past hour are statistically calculated. For example, for the wind speed data, the minimum and maximum values are 2 m / s and 10 m / s respectively. Based on the range coefficient of 0.6, the wind speed data range is adjusted to (2+10) / 2±(10-2) / 2*0.6, that is, the wind speed data range is 3.6 m / s-8.4 m / s. The environmental parameters corresponding to other environmental fluctuation parameters are adjusted according to the above process, including but not limited to temperature data, humidity data, altitude data, wind data, and air pressure data. When performing laser projection measurement, all environmental data must conform to the corresponding environmental data range. By monitoring environmental parameters in real time, when all real-time monitored environmental parameters are within the adjusted environmental data range, a laser plumb line is used to vertically shoot a laser beam upward, passing through pre-set holes in the building's floor slabs and projecting it onto a receiving target within the pre-set holes in the building's measured floor slabs. The system of the present invention calculates a relative offset, and adjusts the point at which the laser beam is projected onto the receiving target based on this relative offset.

[0135] The present invention calculates environmental fluctuation parameters based on the variation amplitude of each environmental parameter data, and determines the maximum measurement deviation of the laser plumb line based on the environmental fluctuation parameters. When the maximum measurement deviation exceeds a preset measurement deviation, a range coefficient is determined according to the ratio of the maximum measurement deviation to the preset measurement deviation within a measurement cycle, and the environmental data range for laser beam projection is determined based on the range coefficient. When the environmental parameters meet the environmental data range, laser projection measurement is performed. This can avoid the introduction of new errors in the calculation or adjustment process caused by a large relative offset, thereby improving the measurement accuracy.

[0136] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0137] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A laser-based measurement and receiving system, characterized in that: include: An adjustable receiving device, wherein the adjustable receiving device is used to fix the receiving target in a reserved hole in the testing floor of the building; A laser plumb line is provided below the adjustable receiving device, and is used to emit a laser beam vertically upward so that the laser beam passes through the reserved holes in the floor slabs of each floor of the building and is projected onto a receiving target in the reserved holes in the measured floor slabs of the building; An environmental monitoring module, connected to the laser plumb line, for acquiring environmental parameter data of a measurement location, wherein the environmental parameter data includes temperature data, wind data, humidity data, altitude data, and air pressure data; a positioning analysis module connected to the environmental monitoring module, configured to determine a relative offset of a point position when the laser beam is projected onto the receiving target based on temperature data, wind data, humidity data, altitude data, and air pressure data, and to determine a maximum measurement deviation of a laser plumb bob based on a variation of the environmental parameter data; The temperature data includes the temperature data of the tested floor and the air temperature data; The wind data includes air density data, wind speed data and wind direction data at the location of the laser plumb line; The humidity data includes relative humidity data in the reserved holes of the floor slabs of each floor of the building and relative humidity data between the floor slabs of each floor of the building; The height data includes the height data of each floor of the building and the height data of the receiving target; The air pressure data includes total air pressure data in the building; The correction output module is connected to the positioning analysis module and is used to adjust the point where the laser beam is projected onto the receiving target according to the relative offset, and to determine the environmental data range for laser projection according to the maximum measurement deviation.

2. The laser-based measurement receiving system according to claim 1, characterized in that The adjustable receiving device includes a first L-shaped clip and a second L-shaped clip, and the first L-shaped clip and the second L-shaped clip are connected by an adjustable connecting rod. The adjustable connecting rod includes a first adjustable connecting rod and a second adjustable connecting rod. The first adjustable connecting rod includes an outer tube, a first connecting rod and a second connecting rod. One end of the first connecting rod and one end of the second connecting rod are respectively inserted into the outer tube from both ends of the outer tube and can be telescopically moved within the outer tube. The other end of the first connecting rod and the other end of the second connecting rod are respectively connected to the first L-shaped clip and the second L-shaped clip by hinges. The outer tube is provided with a first bolt and a first screw hole for installing and fixing the receiving target. The outer tube is provided with a second bolt and a second screw hole for adjusting and fixing the first connecting rod and the second connecting rod. The structure of the second adjustable connecting rod is the same as that of the first adjustable connecting rod.

3. The laser-based measurement receiving system according to claim 1, characterized in that The relative offset includes a first relative offset, a second relative offset and a third relative offset. The positioning analysis module determines the deformation trend of the measured floor according to the temperature data of the measured floor, and obtains the first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the measured floor.

4. The laser-based measurement receiving system according to claim 3, characterized in that The positioning analysis module determines the deformation trend of the tested floor slab according to the temperature data of the tested floor slab, including: A first deformation parameter is calculated based on the temperature data change trend of the tested floor slab, the first deformation parameter is compared with a preset deformation parameter, and the deformation trend of the tested floor slab is determined based on the comparison result. The deformation trend includes expansion of the tested floor slab, contraction of the tested floor slab, and constancy of the tested floor slab.

5. The laser-based measurement receiving system according to claim 4, characterized in that The positioning analysis module obtains a first relative offset of the point where the laser beam is projected onto the receiving target according to the deformation trend and the temperature data of the tested floor, including: If the deformation trend of the tested floor slab is expansion of the tested floor slab, the elongation of the tested floor slab in the length direction and the width direction is determined according to the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined according to the elongation of the tested floor slab in the length direction and the width direction; Alternatively, if the deformation trend of the tested floor slab is shrinkage of the tested floor slab, the shrinkage amount of the tested floor slab in the length direction and the width direction is determined based on the intermediate value between the temperature data of the tested floor slab and the preset deformation parameter, and the first relative offset is determined based on the shrinkage amount in the length direction and the width direction of the tested floor slab; Alternatively, if the deformation trend of the tested floor slab is constant, the first relative offset is determined according to an average slope of a temperature curve of the tested floor slab within a preset time period and a slope threshold.

6. The laser-based measurement receiving system according to claim 3, characterized in that The positioning analysis module determines the wind energy density based on the air density data and the wind speed data, determines the offset angle of the laser beam based on the wind energy density and angle curve, determines the offset direction of the laser beam based on the wind direction data, and determines the second relative offset based on the offset angle of the laser beam, the offset direction of the laser beam and the height data of the receiving target.

7. The laser-based measurement receiving system according to claim 6, characterized in that The positioning analysis module determines the third relative offset based on the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved holes of the floor slabs of each floor of the building, the relative humidity data between the floor slabs of each floor of the building, and the offset angle and offset direction of the laser beam.

8. The laser-based measurement receiving system according to claim 7, characterized in that The positioning analysis module calculates an environmental fluctuation parameter based on the variation range of each environmental parameter data, and determines a maximum measurement deviation of the laser plumb line based on the environmental fluctuation parameter, wherein the environmental fluctuation parameter is determined according to the standard deviation of each environmental parameter data.

9. The laser-based measurement receiving system according to claim 8, characterized in that The correction output module determines a range coefficient according to a ratio of the maximum measurement deviation to a preset measurement deviation within a measurement cycle, and determines an environmental data range for laser projection based on the range coefficient.

10. The laser-based measurement receiving system according to claim 7, characterized in that The positioning analysis module determines the third relative offset based on the air refractive index between the floor slabs of each floor of the building, the air refractive index of the reserved holes of the floor slabs of each floor of the building, the height data of the reserved holes of the floor slabs of each floor of the building, the height data between the floor slabs of each floor of the building, the offset angle of the laser beam, and the offset direction of the laser beam.

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