A laser-based measurement acceptance system

Abstract

The application relates to a kind of laser-based measurement receiving systems, comprising: adjustable receiving device is used to be fixedly arranged in the reserved hole of building survey floor with receiving target;Laser plumb is used to vertically upwardly emit laser beam;Environment monitoring module is used to obtain environmental parameters;Positioning analysis module is used to determine the relative offset of point position when laser beam is projected onto receiving target according to environmental parameters;Correction output module is used to adjust the point position projected onto receiving target according to the relative offset.The application considers the influence of external environmental factors on point projection, monitors the relevant environment of building, determines the relative offset of point position when laser beam is projected onto receiving target according to relevant environmental data, adjusts the point position projected onto receiving target, to overcome the offset of point position projected onto receiving target, and improves the accuracy of control axis of building to upper layer.

Description

TECHNICAL FIELD

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

[0002] One of the main tasks of the multi-storey or high-rise main structure surveying construction of a building project is to accurately transfer the control axis of the building to the upper layer, and to control the vertical deviation, so that the deviation of the control axis projected upward meets the error requirements specified in the specification. The vertical transmission surveying construction of the control axis of the multi-storey or high-rise building of a building project generally uses an internal control method, and a laser plummet or a total station is used to project the point to the working surface. A reserved rectangular hole for vertical projection is needed on the surveyed floor, and then a receiving target is placed thereon to facilitate marking the projected point.

[0003] In order to ensure the accuracy of the projected point of the receiving target, the prior art mainly improves the receiving device to improve the accuracy of the axis transfer, and rarely considers the influence of the environment on the projected point.

[0004] For example, the patent for utility model with the publication number CN208458737U discloses an axis transfer instrument for building construction, which comprises a transfer instrument body, first and second openings are arranged on the two straight ruler side surfaces of the transfer instrument body, first and second sliding blocks are arranged on one side of the first and second openings, clamping grooves are arranged on one side surface of the first and second sliding blocks, inclined surfaces are arranged on the other side surface of the first and second sliding blocks, a hollow column and a support column are rotatably connected to the two inclined surfaces, and a butterfly screw is arranged in the middle of the inner wall of the two clamping grooves and penetrates the top thereof. The limiting structure ensures that the transfer instrument is fixed during use, so as to prevent the angle of the transfer instrument from changing and causing errors in the transfer. As can be seen, the prior art prevents the angle of the transfer instrument from changing and causing errors in the transfer by adding a limiting structure to the transfer instrument, and does not consider the influence of the environment on the transfer accuracy during the transfer. SUMMARY

[0005] Therefore, the present application provides a laser-based measurement receiving system to overcome the problem that the environment affects the transfer during the transfer in the prior art, thereby causing poor transfer accuracy.

[0006] To achieve the above-mentioned purpose, the present application provides a laser-based measurement receiving system, which comprises:

[0007] An adjustable receiving device is used to fixedly arrange the receiving target in the reserved hole of the surveyed floor of the building;

[0008] a laser plummet disposed at the lower side of the adjustable receiving device, the laser plummet configured to emit a laser beam vertically upward and project the laser beam through a reserved hole of each floor slab of the building to a receiving target in a reserved hole of a surveying floor slab of the building;

[0009] an environmental monitoring module connected to the laser plummet, configured to acquire environmental parameter data of a measurement position, the environmental parameter data including temperature data, wind data, humidity data, height 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 on the receiving target when the laser beam is projected thereon according to the temperature data, the wind data, the humidity data, the height data and the air pressure data, and determine a maximum measurement deviation of the laser plummet based on a variation range of the environmental parameter data;

[0011] the temperature data includes temperature data of the surveying floor slab and air temperature data;

[0012] the wind data includes air density data, wind speed data and wind direction data of a position where the laser plummet is located;

[0013] the humidity data includes relative humidity data in the reserved hole of each floor slab of the building and relative humidity data between each floor slab of the building;

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

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

[0016] a correction output module connected to the positioning analysis module, configured to adjust a point on the receiving target when the laser beam is projected thereon according to the relative offset, and determine an environmental data range for laser surveying according to the maximum measurement deviation.

[0017] Further, the adjustable receiving device comprises a first L-shaped clamping strip and a second L-shaped clamping strip, the first L-shaped clamping strip and the second L-shaped clamping strip are connected through adjustable connecting rods, the adjustable connecting rods comprise a first adjustable connecting rod and a second adjustable connecting rod, the first adjustable connecting rod comprises 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 two ends of the outer tube and can move in and out of the outer tube, the other end of the first connecting rod and the other end of the second connecting rod are respectively connected with the first L-shaped clamping strip and the second L-shaped clamping strip through hinges, the outer tube is provided with a first bolt and a first screw hole for 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, and the second adjustable connecting rod has the same structure as the first adjustable connecting rod.

[0018] Further, the relative offset amount comprises a first relative offset amount, a second relative offset amount and a third relative offset amount, the positioning analysis module determines a deformation trend of the test floor according to the temperature data of the test floor, and obtains the first relative offset amount of the point position of the laser beam projected on the receiving target according to the deformation trend and the temperature data of the test floor.

[0019] Further, the positioning analysis module determines a deformation trend of the test floor according to the temperature data of the test floor, and obtains the first relative offset amount of the point position of the laser beam projected on the receiving target according to the deformation trend and the temperature data of the test floor.

[0020] According to the change trend of the temperature data of the test floor, a first deformation parameter is calculated, the first deformation parameter is compared with a preset deformation parameter, and a deformation trend of the test floor is determined according to the comparison result, the deformation trend comprises expansion of the test floor, shrinkage of the test floor and constancy of the test floor.

[0021] Further, the positioning analysis module obtains the first relative offset amount of the point position of the laser beam projected on the receiving target according to the deformation trend and the temperature data of the test floor.

[0022] If the deformation trend of the test floor is expansion of the test floor, the elongation amount of the length direction and the width direction of the test floor is determined according to the intermediate value of the temperature data of the test floor and the preset deformation parameter, and the first relative offset amount is determined according to the elongation amount of the length direction and the width direction of the test floor.

[0023] Or, if the deformation trend of the test floor is shrinkage of the test floor, the shrinkage amount of the length direction and the width direction of the test floor is determined according to the intermediate value of the temperature data of the test floor and the preset deformation parameter, and the first relative offset amount is determined according to the shrinkage amount of the length direction and the width direction of the test floor.

[0024] Or, if the deformation trend of the survey floor is constant, the first relative offset is determined according to the average slope of the temperature curve in the preset time period of the survey floor and the slope threshold.

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

[0026] Further, the positioning analysis module determines the third relative offset according to the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved holes of the floors of the building, the relative humidity data between the floors of the building and the offset angle of the laser beam and the offset direction of the laser beam.

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

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

[0029] Further, the positioning analysis module determines the third relative offset according to the air refractive index between the floors of the building, the air refractive index of the reserved holes of the floors of the building, the height data of the reserved holes of the floors of the building, the height data between the floors 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 beneficial effects of the present application are that,

[0031] The laser-based measurement receiving system of the present application considers the influence of external environmental factors on point location measurement, monitors the relevant environment of the building, obtains environmental parameter data when the laser beam passes through the reserved holes of the floors of the building and is projected onto the receiving target in the reserved holes of the survey floor of the building, determines the relative offset of the point location when the laser beam is projected onto the receiving target according to the relevant environmental data, adjusts the point location projected onto the receiving target according to the relative offset, to offset the deviation of the point location projected onto the receiving target caused by external environmental factors, and further improves the accuracy of the control axis of the building leading to the upper layer.

[0032] Further, the application designs an adjustable receiving device, the L-shaped clamping strip can make the receiving device erect 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, and since the first adjustable connecting rod and the second adjustable connecting rod are adjustable, they are hinged with the L-shaped clamping strip through a hinge structure, i.e. a telescopic movable design, so that stable fixation can be achieved through adjustment even in the face of irregular reserved holes, which is flexible and convenient, effectively solves the problems of unstable receiving target, displacement and height difference, improves the measurement accuracy and work efficiency.

[0033] Further, temperature change can cause the thermal expansion and contraction of the floor material, thereby affecting the accuracy of the control axis of the building to the upper layer, and producing errors. When the temperature rises, the floor material expands; when the temperature decreases, the material shrinks, and such expansion and contraction can cause the size of the floor to change, thereby affecting the position of the control axis of the building. Therefore, the application determines the first relative offset according to the temperature data of the measured floor, adjusts or corrects the point position of the laser beam projected onto the receiving target in the reserved hole of the measured floor of the building through the first offset, to offset the thermal expansion and contraction of the floor material caused by temperature change, thereby causing the offset of the control axis of the building to the upper layer, and improve the measurement accuracy.

[0034] Further, wind can cause the laser beam of the laser plummet to deviate, and the deviation of the laser beam can cause the projected point position to be inaccurate, affecting the measurement accuracy. Therefore, the application determines the second relative offset according to the wind data of the position of the laser plummet, adjusts or corrects the point position of the laser beam projected onto the receiving target in the reserved hole of the measured floor of the building through the second offset, to offset the deviation of the laser beam of the laser plummet caused by wind, thereby causing the offset of the control axis of the building to the upper layer, and improve the measurement accuracy.

[0035] Further, the application considers the structural characteristics of the high-rise main body of the construction project, takes the space path between the floors of the building as a separate research area in the light path of the vertically upward emitted laser beam, takes the reserved holes of the floors of the building as another separate research area, due to the structural differences between the space between the floors of the building and the reserved holes of the floors of the building, the humidity difference between the two is relatively obvious, when the laser beam passes through the reserved holes of the floors of the building and is projected on the receiving target in the reserved holes of the measured floor of the building, due to the space humidity difference between the space between the floors of the building and the reserved holes of the floors of the building, the laser will be refracted when passing through the contact surface between the space between the floors of the building and the reserved holes of the floors of the building, therefore, the application determines the third relative offset according to the relative humidity data in the reserved holes of the floors of the building, the relative humidity data between the floors of the building, the offset angle of the laser beam, etc., adjusts or corrects the point position of the laser beam projected on the receiving target in the reserved holes of the measured floor of the building through the third offset, to offset the humidity difference between the high-rise main body of the construction project, which causes the laser to be refracted in the air and the light path to be offset, and further causes the offset of the control axis of the building to be introduced to the upper layer, thereby improving the introduction accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the system of the application;

[0037] Figure 2 It is a top view of the adjustable receiving device of the application;

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

[0039] Figure 4 It is a top view of the adjustable receiving device of the application in use state one;

[0040] Figure 5 It is a front view of the adjustable receiving device of the application in use state one;

[0041] Figure 6 It is a top view of the adjustable receiving device of the application in use state two;

[0042] Figure 7 It is a schematic diagram of the control axis of the high-rise building introduced upward according to the internal control method;

[0043] Fig. 1: first L-shaped clamping strip; 2: second L-shaped clamping strip; 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 plummet; 13: survey floor; 14: reserved hole; 15: sliding block; 16: control axis. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present application clearer, the following further describes the present application with reference to examples; it should be understood that the specific examples described herein are merely used to explain the present application and do not limit the present application.

[0045] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0046] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which are merely for the convenience of description and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0048] Referring to Figure 1 as shown, a laser-based measurement receiving system, comprising:

[0049] An adjustable receiving device is used to fixedly arrange a receiving target in a reserved hole of a survey floor of a building;

[0050] A laser plummet is arranged on the lower side of the adjustable receiving device, which is used to vertically emit a laser beam and make the laser beam pass through the reserved hole of each floor of the building and project onto the receiving target in the reserved hole of the survey floor of the building;

[0051] an environment monitoring module connected with the laser plumb instrument, used to acquire environment parameter data of a measurement position, the environment parameter data including temperature data, wind force data, humidity data, height data and air pressure data;

[0052] a positioning analysis module connected with the environment monitoring module, used to determine a relative offset of a point position when the laser beam is projected onto the receiving target according to the temperature data, the wind force data, the humidity data, the height data and the air pressure data, and determine a maximum measurement deviation of the laser plumb instrument based on a variation range of the environment parameter data;

[0053] the temperature data includes temperature data of a measurement floor and air temperature data;

[0054] the wind force data includes air density data, wind speed data and wind direction data of a position where the laser plumb instrument is located;

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

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

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

[0058] a correction output module connected with the positioning analysis module, used to adjust the point position when the laser beam is projected onto the receiving target according to the relative offset, and determine an environment data range for laser projection according to the maximum measurement deviation.

[0059] The laser-based measurement receiving system of the present application considers the influence of external environmental factors on point position projection, acquires environment parameter data when the laser beam is projected onto the receiving target in the reserved hole of the measurement floor of the building through the reserved holes of each floor of the building by monitoring the related environment of the building, determines the relative offset of the point position when the laser beam is projected onto the receiving target according to the related environment data, adjusts the point position when the laser beam is projected onto the receiving target according to the relative offset, so as to offset the deviation of the point position when the laser beam is projected onto the receiving target caused by external environmental factors, and further improves the accuracy of the control axis of the building in the upper layer.

[0060] Please refer to Figures 2-3As shown, the adjustable receiving device comprises a first L-shaped clamping strip 1 and a second L-shaped clamping strip 2, and the first L-shaped clamping strip 1 and the second L-shaped clamping strip 2 are connected through adjustable connecting rods, the adjustable connecting rods comprise a first adjustable connecting rod 3 and a second adjustable connecting rod 4, the first adjustable connecting rod 3 comprises 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 two 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 with the first L-shaped clamping strip 1 and the second L-shaped clamping strip 2 through hinges 8, the outer tube 5 is provided with a first bolt 10 and a first screw hole for mounting and fixing a receiving target 9, 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, and the second adjustable connecting rod 4 has the same structure as the first adjustable connecting rod 3.

[0061] As shown in the drawings, Figure 7 As shown, the existing building engineering multistory or high-rise building control axis 16 vertical transmission measurement construction commonly adopts an internal control method, and a point position is measured to a working surface by using a laser plumb instrument 12 or a total station instrument. A rectangular reserved hole 14 required for vertical measurement is reserved on a measured floor slab 13 surface, and then a receiving target 9 is placed thereon to facilitate marking of the measured point position. However, in the actual construction process, the reserved rectangular hole may be irregular, the construction floor slab surface is not flat, the receiving target 9 is not stable when placed thereon, and the receiving target 9 is prone to displacement when marking the measured point position, so that the measurement work efficiency is low. In addition, the receiving target 9 has a certain thickness (the thickness is about 5 mm), which is higher than the floor slab surface, and there is a height difference. If the measured point position is to be measured by using an ink line to the floor slab surface, the measured point position is also prone to displacement, which leads to repeated line measurement and reduces the measurement accuracy.

[0062] Therefore, the present application designs an adjustable receiving device, please refer to Figures 4-5 As shown, the reserved hole 14 is a regular rectangle in this state, and the L-shaped clamping strip can enable the receiving device to be erected on the reserved hole 14 of the floor slab, so that the receiving target 9 fixed on the receiving device is located in the reserved hole 14 of the floor slab and is parallel to the floor surface, please refer to Figure 6 As shown, the reserved hole 14 is irregular in this state, but since the first adjustable connecting rod 3 and the second adjustable connecting rod 4 are adjustable, they are hingedly connected with the L-shaped clamping strip through a hinge structure, that is, they are designed to be telescopically movable, so that even in the face of irregular reserved holes 14, stable fixation can be achieved through adjustment, which is flexible and convenient, effectively solves the problems of unstable receiving target, displacement and height difference, improves the measurement accuracy and work efficiency.

[0063] As an implementation, the receiving target can be fixedly installed by the sliding piece, that is, the sliding block 15 is sleeved 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 with the sliding block 15, so that the position of the receiving target 9 can be adjusted by sliding when the reserved hole 14 position deviates.

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

[0065] Specifically, the relative offset amount includes a first relative offset amount, a second relative offset amount, and a third relative offset amount, the positioning analysis module determines a deformation trend of the survey floor according to temperature data of the survey floor, and obtains the first relative offset amount of the point on the receiving target projected by the laser beam according to the deformation trend and the temperature data of the survey floor.

[0066] Temperature changes can cause the floor material to expand and contract, which in turn affects the accuracy of the control axis of the building to the upper layer, resulting in errors. When the temperature rises, the floor material expands; when the temperature decreases, the material shrinks. This expansion and contraction can cause the floor size to change, which in turn affects the position of the control axis of the building. Therefore, the first relative offset amount is determined according to the temperature data of the survey floor, and the point on the receiving target projected by the laser beam into the reserved hole of the survey floor is adjusted or corrected by the first offset amount, to offset the offset caused by the expansion and contraction of the floor material due to temperature changes, thereby improving the accuracy of the survey.

[0067] The temperature data is specifically the temperature of the survey floor when the laser beam passes through the reserved hole of each floor of the building and is projected onto the receiving target in the reserved hole of the survey floor.

[0068] It can be understood that the area of the floor is usually large, and for the temperature of the survey floor, a plurality of temperature detection points or devices can be arranged on the floor to determine the temperature data of the floor by averaging the measurements of multiple positions.

[0069] Specifically, the positioning analysis module determines the deformation trend of the survey floor according to the temperature data of the survey floor, which includes:

[0070] According to the temperature data of the survey floor, the first deformation parameter is calculated, the first deformation parameter is compared with the preset deformation parameter, and the deformation trend of the survey floor is determined according to the comparison result. The deformation trend includes expansion of the survey floor, contraction of the survey floor, and constant of the survey floor.

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

[0072] It can be understood that the deformation trend characterizes the state of the surveyed floor when the laser beam passes through the reserved holes of the floors of each floor of the building and is projected onto the receiving target in the reserved hole of the surveyed floor of the building, which is in a thermal expansion state (the surveyed floor expands), a cold shrinkage state (the surveyed floor shrinks), or a normal state (the surveyed floor is constant).

[0073] As an embodiment, if the initial temperature of the floor is 20°C, when the temperature rises to 30°C, the floor will expand, and when the temperature drops to 10°C, the floor will shrink, and the preset deformation parameter is 10-30°C. If the temperature of the surveyed floor when the laser beam passes through the reserved holes of the floors of each floor of the building and is projected onto the receiving target in the reserved hole of the surveyed floor of the building is between 10-30°C, such as 25°C, that is, the first deformation parameter is 20-25°C, which is within the preset deformation parameter, then the deformation trend of the surveyed floor is constant. If the temperature of the surveyed floor when the laser beam passes through the reserved holes of the floors of each floor of the building and is projected onto the receiving target in the reserved hole of the surveyed floor of the building is higher than 30°C, such as 35°C, that is, the first deformation parameter is 20-35°C, part of the range of the first deformation parameter is above the preset deformation parameter, then the deformation trend of the surveyed floor is expansion. If the temperature of the surveyed floor when the laser beam passes through the reserved holes of the floors of each floor of the building and is projected onto the receiving target in the reserved hole of the surveyed floor of the building is lower than 10°C, such as 5°C, that is, the first deformation parameter is 20-5°C, part of the range of the first deformation parameter is below the preset deformation parameter, then the deformation trend of the surveyed floor is shrinkage.

[0074] Specifically, the positioning analysis module obtains the first relative offset of the point position of the laser beam projected onto the receiving target according to the deformation trend and the temperature data of the surveyed floor, which includes:

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

[0076] Or, if the deformation trend of the surveyed floor is shrinkage, the contraction of the length direction and the width direction of the surveyed floor is determined according to the intermediate value of the temperature data of the surveyed floor and the preset deformation parameter, and the first relative offset is determined according to the contraction of the length direction and the width direction of the surveyed floor.

[0077] Or, if the deformation trend of the test floor is constant, the first relative offset is determined according to the average slope of the temperature curve of the test floor in the preset time period and the slope threshold.

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

[0079] For the numerical value of the first offset, it can be considered that the deformation of the test floor is uniform, and the volume uniformly expands or shrinks when it is hot expanded or cold contracted, which can be characterized as the deformation of the test floor in the length direction, the width direction and the height direction. Since the guide control axis is carried out in the two-dimensional plane of the test floor, the deformation in the height direction does not cause any influence, so only the deformation amount of the test floor in the length direction and the width direction is calculated, and the resultant vector is obtained to obtain the first relative offset.

[0080] For the deformation amount of the test floor in the length direction and the width direction, the thermal expansion coefficient of the floor material, the temperature change (the difference between the temperature data of the test floor and the intermediate value of the preset deformation parameter) and the original size are combined to calculate, which can use any algorithm in the prior art in the field, which falls within the protection scope of the present application.

[0081] As an embodiment, the elongation amount of the test floor in the length direction is calculated as follows:

[0082] The elongation amount of the test floor thermal expansion is mainly determined by the linear expansion coefficient of the test floor material, and the calculation formula is:

[0083] Wherein, is the elongation amount of the test floor in the length direction, is the linear expansion coefficient of the test floor material, is the original size of the test floor, is the temperature change, which is the difference between the temperature data of the test floor and the intermediate value of the preset deformation parameter.

[0084] The elongation amount of the test floor in the width direction The calculation of the elongation amount of the test floor in the width direction is the same as that of the elongation amount of the test floor in the length direction, which will not be described here.

[0085] After the elongation amount of the test floor in the length direction and the width direction is calculated, the resultant vector of the two is calculated, that is, the first relative offset of the point on the receiving target where the laser beam is projected when the deformation trend of the test floor is expansion.

[0086] When the deformation trend of the measurement floor slab is contraction, the contraction amounts of the measurement floor slab in the length direction and the width direction are similar to the calculation process of the elongation amounts of the measurement floor slab in the length direction and the width direction, and after the contraction amounts of the measurement floor slab in the length direction and the width direction are calculated, the resultant vector of the two is calculated, that is, the first relative displacement of the point position of the laser beam projected on the receiving target when the deformation trend of the measurement floor slab is contraction, and the specific process will not be repeated.

[0087] When the deformation trend of the measurement floor slab is constant, it is necessary to determine whether the first relative displacement needs to be calculated according to the temperature change rate of the measurement floor slab in the past period of time.

[0088] Specifically, the detection of the temperature data of the present application is real-time, and the temperature curve can be drawn according to the temperature data of the measurement floor slab in the past 30 minutes, the average slope of the temperature curve is calculated, and the average slope of the temperature curve is compared with the pre-set slope threshold value. If the average slope of the temperature curve is greater than the pre-set slope threshold value, the first relative displacement needs to be calculated according to the above-mentioned method for calculating the deformation amount of the measurement floor slab to determine the first relative displacement, and if the average slope of the temperature curve is less than or equal to the pre-set slope threshold value, the calculation is not needed, that is, the first relative displacement is zero.

[0089] Specifically, the positioning analysis module determines the wind energy density according to the air density data and the wind speed data, determines the offset angle of the laser beam according to the wind energy density and the angle curve, determines the offset direction of the laser beam according to the wind direction data, and determines the second relative displacement according to the offset angle of the laser beam, the offset direction of the laser beam and the height data of the receiving target.

[0090] In the point position surveying by using the laser plummet, the laser beam needs to be vertically upwardly emitted and to pass through the reserved holes of each floor slab of the building and to be projected onto the receiving target in the reserved hole of the surveying floor slab of the building, so as to ensure that the laser beam emitted by the laser plummet is vertical, which is a necessary condition for ensuring the accuracy of the point position receiving and surveying. However, in the actual surveying process, the environmental wind will cause the air density to be uneven, so that the laser beam of the laser plummet will be deviated, and the deviation of the laser beam will cause the surveyed point position to be inaccurate, thereby affecting the measurement accuracy. Therefore, the second relative deviation amount is determined according to the wind data of the position where the laser plummet is located, the surveyed point position of the laser beam projected onto the receiving target in the reserved hole of the surveying floor slab of the building is adjusted or corrected by using the second deviation amount, so as to offset the deviation of the laser beam of the laser plummet caused by the wind, and further to offset the deviation of the control axis of the building when the control axis is upwardly surveyed to the upper layer, thereby improving the surveying accuracy. It can be understood that the temperature change in the height direction between the laser plummet and the surveying floor slab can also affect the deviation of the laser beam, at this time, since the temperature change in the height direction can be reflected by the air density and the environmental wind, therefore, the second relative deviation amount is determined by using the wind data.

[0091] The wind data includes the air density data, the wind speed data and the wind direction data of the position where the laser plummet is located.

[0092] The wind energy density data can be calculated according to the air density data and the wind speed data of the position where the laser plummet is located, and the specific calculation formula is as follows:

[0093] wherein, the wind energy density, the air density, the wind speed.

[0094] Further, the air density data, the wind speed data and the wind direction data of the position where the laser plummet is located are all detected in real time.

[0095] After the wind energy density data of the position where the laser plummet is located when the laser beam passes through the reserved holes of each floor slab of the building and is projected onto the receiving target in the reserved hole of the surveying floor slab of the building is obtained, the deviation angle of the laser beam is determined according to the wind energy density and the angle curve, the angle curve can be obtained according to the experiment or the historical data in advance, for example, the laser beam is vertically upwardly emitted by the laser plummet in the laboratory, the deviation angle of the emitted laser beam is measured under different wind energy densities, and the wind energy density-deviation angle curve is drawn, when the wind energy density data of the position where the laser plummet is located when the laser beam passes through the reserved holes of each floor slab of the building and is projected onto the receiving target in the reserved hole of the surveying floor slab of the building is obtained, the deviation angle of the laser beam is obtained according to the calculated wind energy density data and the wind energy density-deviation angle curve.

[0096] After the offset angle is determined, in combination with the height data of the receiving target (specifically, the distance from the receiving target to the laser emission point of the laser plumb), according to the Pythagorean theorem, the height data of the receiving target is a right angle side, the angle between the laser beam (the hypotenuse) and the laser beam (the hypotenuse) is the offset angle of the laser beam, and according to the trigonometric function, the offset length of the laser beam on the receiving target (the other right angle 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.

[0097] Further, if the wind speed data is zero, it indicates that there is no wind, and the second relative offset is zero.

[0098] Specifically, the positioning analysis module determines the third relative offset according to the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved hole of each floor slab of the building, the relative humidity data between each floor slab of the building, and the offset angle and offset direction of the laser beam.

[0099] It can be understood that the total air pressure data in the building can be calculated and determined by taking the average of the total pressure data of each part of the building.

[0100] When using a laser plumb to perform point location surveying, it is necessary to vertically emit a laser beam and make the laser beam pass through the reserved holes of each floor slab of the building and project onto the receiving target in the reserved hole of the surveyed floor slab of the building, so as to ensure that the laser beam emitted by the laser plumb is perpendicular, which is a necessary condition to ensure the accuracy of point location receiving and surveying. However, in the actual surveying process, due to the influence of the environment on the laser plumb, specifically, when the air humidity is large, the humidity difference between the main bodies of the building causes the laser to refract in the air, mainly because the humidity changes the refractive index of the air, thereby changing the laser path and causing errors.

[0101] The application considers the structural characteristics of the high-rise main body of the building engineering, takes the space path between the floors of the building as a separate research area in the light path of the vertically upward emitted laser beam, takes the reserved holes of the floors of the building as another separate research area, due to the structural differences between the space between the floors of the building and the reserved holes of the floors of the building, the humidity difference between the two is relatively obvious, when the laser beam passes through the reserved holes of the floors of the building and is projected on the receiving target in the reserved holes of the measured floor of the building, due to the space humidity difference between the space between the floors of the building and the reserved holes of the floors of the building, the laser will be refracted when passing through the contact surface between the space between the floors of the building and the reserved holes of the floors of the building, therefore, the third relative offset is determined according to the relative humidity data in the reserved holes of the floors of the building, the relative humidity data between the floors of the building, the offset angle of the laser beam, etc., the point position of the laser beam projected on the receiving target in the reserved holes of the measured floor of the building is adjusted or corrected through the third offset, so as to offset the humidity difference between the high-rise main body of the building engineering, the refraction of the laser in the air to cause the light path offset, and then the offset caused by the control axis of the building to the upper layer when the measurement is introduced, and the measurement accuracy is improved.

[0102] Specifically, the air temperature data includes the average air temperature data between the floors of the building and the air temperature data in the reserved holes of the floors of the building, the saturated water vapor pressure between the floors of the building is determined according to the average temperature data between the floors of the building, and the saturated water vapor pressure of the reserved holes of the floors of the building is determined according to the temperature data in the reserved holes of the floors of the building.

[0103] When determining the third relative offset, first, the saturated water vapor pressures between the floors of the building and in the reserved holes of the floors of the building are determined.

[0104] In an embodiment, assuming that the 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,..., the average air temperature data between the N-1th floor and the Nth floor are detected, the temperature data in the reserved holes of the first floor, the air temperature data in the reserved holes of the second floor,..., the temperature data in the reserved holes of the Nth floor are detected, and the saturated water vapor pressures 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,..., in the reserved holes of the Nth floor are calculated:

[0105] Among them, is the saturated water vapor pressure, is the air temperature data, when calculating the saturated water vapor pressure between each floor slab, is the air average temperature data between each floor slab, when calculating the saturated water vapor pressure in the reserved hole of each floor slab, is the air temperature data in each reserved hole.

[0106] Specifically, the air refractive index between each floor slab of the building is determined according to the relative humidity data between each floor slab of the building, the saturated water vapor pressure between each floor slab of the building, and the total air pressure data in the building, and the air refractive index in the reserved hole of each floor slab of the building is determined according to the relative humidity data in the reserved hole of each floor slab of the building, the saturated water vapor pressure in the reserved hole of each floor slab of the building, and the total air pressure data in the building.

[0107] In the third relative offset, the second step determines the air refractive index between each floor slab of the building and the air refractive index in the reserved hole of each floor slab of the building.

[0108] After determining the saturated water vapor pressure between each floor slab of the building and the saturated water vapor pressure in the reserved hole of each floor slab of the building, the water vapor partial pressure between each floor slab of the building and the water vapor partial pressure in the reserved hole of each floor slab of the building can be determined according to the saturated water vapor pressure between each floor slab of the building and the saturated water vapor pressure in the reserved hole of each floor slab of the building:

[0109] 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 air relative humidity between the first floor slab and the second floor slab, when calculating the water vapor partial pressure in the reserved hole of the first floor slab, RH is the air relative humidity in the reserved hole of the first floor slab, and so on, to determine the water vapor partial pressure between each floor slab of the building and the water vapor partial pressure in the reserved hole of each floor slab of the building.

[0110] Then, according to the following formula:

[0111] wherein, is the air refractive index, A and B are constants, and are usually taken as , , is the absolute temperature, , 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 and the second floor, e is the water vapor partial pressure between the first floor and the second floor, when calculating the air refractive index in the reserved hole of the first floor, e is the water vapor partial pressure in the reserved hole of the first floor, and so on, to determine the air refractive index between each floor of the building and the air refractive index in the reserved hole of each floor of the building.

[0112] Specifically, according to the air refractive index between each floor of the building, the air refractive index of the reserved hole of each floor of the building, the height data of the reserved hole of each floor of the building, the height data between each floor of the building, the offset angle of the laser beam, and the offset direction of the laser beam, the third relative offset is determined.

[0113] Since the laser is not refracted when it is vertically incident on air with different air refractive indices, when the second relative offset is zero, that is, the offset angle of the laser beam is zero, the third relative offset is also zero.

[0114] In the third step of determining the third relative offset, when the offset angle of the laser beam is not zero, according to the air refractive index between each floor of the building, the air refractive index of the reserved hole of each floor of the building, the height data of each floor of the building, the height data between each floor of the building, the offset angle of the laser beam, and the offset direction of the laser beam, the third relative offset is determined.

[0115] In one embodiment, the building has N floors, and the air refractive index between each floor of the building (the first floor is the ground of the second floor / two floors, and each floor includes the ground between the ground and the first floor), the air refractive index of the reserved hole of each floor 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 hole of each floor of the building (i.e., the thickness of the floor), the height data between each floor of the building, and the offset direction of the laser beam have been determined.

[0116] The refractive angle of the laser beam incident on the reserved hole of the first floor is calculated, and the incident medium is the air between the ground and the first floor. The refractive medium is the air in the reserved hole of the first floor, and the calculation formula is:

[0117] wherein, n1 is the refractive index of the incident medium (i.e., the air refractive index between the ground and the first floor), n2 is the refractive index of the refractive medium (i.e., the air refractive index of the reserved hole of the first floor), is the incident angle (i.e., the initial offset angle of the laser beam), is the refraction angle (i.e. the refraction angle of the laser beam into the reserved hole of the first floor slab).

[0118] After the refraction angle of the laser beam into the reserved hole of the first floor slab is obtained, the offset of the laser beam in the reserved hole of the first floor slab can be calculated according to the height of the reserved hole of the first floor slab, that is: height x .

[0119] The refraction angle of the laser beam from the reserved hole of the first floor slab into the space between the first floor slab and the second floor slab is calculated, at this time, the incident medium is the air in the reserved hole of the first floor slab, and the refractive medium is the air between the first floor slab and the second floor slab, and the calculation formula is the same as above, is the refractive index of the incident medium (i.e. the refractive index of the air in the reserved hole of the first floor slab), is the refractive index of the refractive medium (i.e. the refractive index of the air between the first floor slab and the second floor slab), is the incident angle (i.e. the refraction angle of the laser beam into the reserved hole of the first floor slab), is the refraction angle (i.e. the refraction angle of the laser beam into the space between the first floor slab and the second floor slab). The offset of the laser beam between the first floor slab and the second floor slab is: height x .

[0120] By analogy, the offsets between the floors of the building and the offsets in the reserved holes of the floors are calculated, and the third relative offset is obtained by summing.

[0121] After the first relative offset, the second relative offset and the third relative offset are determined, the point of the laser beam projected onto the receiving target is adjusted according to the first relative offset, the second relative offset and the third relative offset.

[0122] Specifically, the application further comprises calculating an environmental fluctuation parameter based on the variation amplitude of each environmental parameter data by the positioning analysis module, and determining the maximum measurement deviation of the laser plumb instrument based on the environmental fluctuation parameter, wherein the environmental fluctuation parameter is determined according to the standard deviation of each environmental parameter data.

[0123] Taking air temperature data as an example, for the average air temperature data between the floors of the building, the variation amplitude of the average air temperature between the floors of the building in the past one hour is calculated, that is, the standard deviation of the average air temperature between the floors of the building in the past one hour, if there are N floors, there are N standard deviations, and the average 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.

[0124] Taking the wind speed data in the wind data as an example, for the wind speed data of the position where the laser plummet is located, the variation range of the wind speed data of the position where the laser plummet is located in the past one hour, i.e., the standard deviation of the wind speed data of the position where the laser plummet is located in the past one hour, is calculated as the environmental fluctuation parameter corresponding to the wind speed data.

[0125] The environmental fluctuation parameter-relative offset curve is drawn according to the environmental fluctuation parameter and the relative offset in the historical data, and the measurement deviation is determined according to the calculated environmental fluctuation parameter. It can be understood that the environmental fluctuation parameter is calculated based on the variation range of each environmental parameter data, and at least two environmental fluctuation parameters are calculated according to at least two parameter data in the environmental parameter data, at least two measurement deviations are determined according to 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 plummet.

[0126] It can be understood that the above-mentioned maximum measurement deviation only takes the size of the value.

[0127] Specifically, the application further comprises that the correction output module determines a range coefficient according to the ratio of the maximum measurement deviation to the preset measurement deviation in a measurement period, and determines the environmental data range for laser projection based on the range coefficient. Laser projection refers to that the laser plummet vertically emits a laser beam and makes the laser beam pass through the reserved hole of each floor slab of the building and project onto the receiving target in the reserved hole of the measured floor slab of the building.

[0128] As a specific embodiment, it is determined that the maximum measurement deviation is 15mm, and the preset measurement deviation is 9mm, which indicates that according to historical data, the maximum measurement deviation is greater than the preset measurement deviation according to the change range of each environmental parameter data in the past one hour, if the determination and calculation of the relative offset continue under this condition, the relative offset is likely to exceed the preset measurement deviation, and in this case, even if the relative offset is finally determined, new errors will be introduced in the calculation or adjustment process due to the large relative offset, therefore, in this case, the range coefficient is determined as 3 / 5=0.6, the maximum value and the minimum value of the environmental parameter of the environmental fluctuation parameter in the past one hour are statistically calculated, for example, for wind speed data, the minimum value and the maximum value are 2m / s and 10m / 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 3.6m / s-8.4m / s, and the environmental data range of other environmental fluctuation parameters is adjusted according to the above process, including but not limited to temperature data, humidity data, height data, wind power data and air pressure data. When performing laser measurement, each environmental data needs to meet the corresponding environmental data range. By monitoring the environmental parameters in real time, when all the environmental parameters are within the adjusted environmental data range, the laser plummet vertically emits a laser beam and makes the laser beam pass through the reserved hole of each floor slab of the building to project onto the receiving target in the reserved hole of the measured floor slab of the building, and the relative offset is calculated by the system, and the point where the laser beam projects onto the receiving target is adjusted according to the relative offset.

[0129] The present application calculates the environmental fluctuation parameter based on the change range of each environmental parameter data, and determines the maximum measurement deviation of the laser plummet based on the environmental fluctuation parameter, when the maximum measurement deviation exceeds the preset measurement deviation, the range coefficient is determined according to the ratio of the maximum measurement deviation to the preset measurement deviation in one measurement period, and the environmental data range for laser beam projection is determined based on the range coefficient, and the laser measurement is performed when the environmental parameters meet the environmental data range, which can avoid the introduction of new errors in the calculation or adjustment process caused by the large relative offset, thereby improving the measurement accuracy.

[0130] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

[0131] The above merely illustrates the preferred embodiments of the present application, and is not used to limit the present application; for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser-based measurement acceptance system, characterized by, The application relates to a laser plumb instrument and a method for measuring a building surveying floor. The application comprises: an adjustable receiving device for fixing a receiving target in a reserved hole of a building surveying floor; a laser plumb instrument arranged at the lower side of the adjustable receiving device, which is used for vertically upwardly emitting a laser beam and projecting the laser beam through the reserved holes of the floors of the building to the receiving target in the reserved hole of the building surveying floor; an environment monitoring module connected with the laser plumb instrument, which is used for acquiring environment parameter data of a measuring position, wherein the environment parameter data comprises temperature data, wind force data, humidity data, height data and air pressure data; a positioning analysis module connected with the environment monitoring module, which is used for determining a relative offset of a point position of the laser beam projected on the receiving target according to the temperature data, the wind force data, the humidity data, the height data and the air pressure data, and determining a maximum measuring deviation of the laser plumb instrument based on the variation range of the environment parameter data; the temperature data comprises temperature data of the building surveying floor and air temperature data; the wind force data comprises air density data, wind speed data and wind direction data of the position where the laser plumb instrument is arranged; the humidity data comprises relative humidity data in the reserved holes of the floors of the building and relative humidity data between the floors of the building; the height data comprises height data of the floors of the building and height data of the receiving target; the air pressure data comprises total air pressure data in the building; a correction output module connected with the positioning analysis module, which is used for adjusting the point position of the laser beam projected on the receiving target according to the relative offset, and determining an environment data range for laser projection according to the maximum measuring deviation; the relative offset comprises a first relative offset, a second relative offset and a third relative offset, the positioning analysis module determines a deformation trend of the building surveying floor according to the temperature data of the building surveying floor, and obtains the first relative offset of the point position of the laser beam projected on the receiving target according to the deformation trend and the temperature data of the building surveying floor; the positioning analysis module determines the deformation trend of the building surveying floor according to the temperature data of the building surveying floor, which comprises: calculating a first deformation parameter according to the temperature data variation trend of the building surveying floor, comparing the first deformation parameter with a preset deformation parameter, and determining the deformation trend of the building surveying floor according to the comparison result, wherein the deformation trend comprises expansion of the building surveying floor, shrinkage of the building surveying floor and constancy of the building surveying floor; the positioning analysis module determines a wind energy density according to the air density data and the wind speed data, determines an offset angle of the laser beam according to the wind energy density and an angle curve, determines an offset direction of the laser beam according to the wind direction data, and determines the second relative offset according to the offset angle of the laser beam, the offset direction of the laser beam and the height data of the receiving target; the positioning analysis module determines the third relative offset according to the air temperature data, the total air pressure data in the building, the relative humidity data in the reserved holes of the floors of the building, the relative humidity data between the floors of the building, the offset angle of the laser beam and the offset direction of the laser beam. Or the positioning analysis module determines the third relative offset according to air refractive indexes between floors of the building, air refractive indexes of reserved holes of the floors of the building, height data of the reserved holes of the floors of the building, height data between the floors of the building, an offset angle of the laser beam, and an offset direction of the laser beam.

2. The laser-based measurement acceptance system of claim 1, wherein, The adjustable receiving device comprises a first L-shaped clamping strip and a second L-shaped clamping strip, and the first L-shaped clamping strip and the second L-shaped clamping strip are connected through adjustable connecting rods.

3. The laser-based measurement acceptance system of claim 1, wherein, The positioning analysis module obtains the first relative offset of the point where the laser beam is projected on the receiving target according to the deformation trend and the temperature data of the measured floor. If the deformation trend of the measured floor is expansion, the elongation of the length direction and the width direction of the measured floor is determined according to the temperature data of the measured floor and the intermediate value of the preset deformation parameter, and the first relative offset is determined according to the elongation of the length direction and the width direction of the measured floor. Or, if the deformation trend of the measured floor is contraction, the contraction of the length direction and the width direction of the measured floor is determined according to the temperature data of the measured floor and the intermediate value of the preset deformation parameter, and the first relative offset is determined according to the contraction of the length direction and the width direction of the measured floor. Or, if the deformation trend of the measured floor is constant, the first relative offset is determined according to the average slope of the temperature curve in the preset time period of the measured floor and the slope threshold.

4. The laser-based measurement acceptance system of claim 1, wherein, The positioning analysis module calculates an environmental fluctuation parameter based on the variation amplitudes of the environmental parameter data, and determines 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 the environmental parameter data.

5. The laser-based measurement acceptance system of claim 4, wherein, The correction output module determines a range coefficient according to the ratio of the maximum measurement deviation to a preset measurement deviation in one measurement period, and determines the environmental data range for laser measurement based on the range coefficient.

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