CN112539739A - Wall surface measuring device and wall surface measuring method - Google Patents
Wall surface measuring device and wall surface measuring method Download PDFInfo
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- CN112539739A CN112539739A CN201910893833.8A CN201910893833A CN112539739A CN 112539739 A CN112539739 A CN 112539739A CN 201910893833 A CN201910893833 A CN 201910893833A CN 112539739 A CN112539739 A CN 112539739A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
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Abstract
The application discloses a wall surface measuring device and a wall surface measuring method. Wherein wall surface measuring equipment includes: a laser range finder; and a processor coupled to the laser rangefinder, the processor configured to: projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction through a laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and calculating coordinate information of the plurality of projection points according to the distance between the laser range finder and the plurality of projection points.
Description
Technical Field
The application relates to the technical field of internet home decoration, in particular to wall surface measuring equipment and a wall surface measuring method.
Background
With the vigorous development of the real estate industry and the increasing improvement of the living standard of people, the requirements of people on houses, particularly decoration, are higher and higher. Before decoration design, the geometric information process of the house types and the spaces needs to be accurately measured. Most of the measurement means at the present stage depend on manual measurement by a handheld tape measure or other instruments (such as a laser range finder), and the expensive laser scanner is rarely used for three-dimensional scanning to obtain point cloud for modeling. However, the traditional method for measuring the house type by manually holding the laser range finder or the tape measure has large workload, generally takes several hours after completely measuring the house type with the length of about 100 square meters, requires cooperation of multiple persons, and has large error of obtained data. The laser scanner mode is that the hardware cost is very high, dozens of millions of common scanners on the market are often, the operation is complex, the obtained mass point cloud data information is redundant, and the later three-dimensional modeling is complex.
Aiming at the technical problems that the workload of manually holding the laser range finder to measure the house type in the prior art is large, the error is large, the cost of the laser scanner is large, the obtained data information is redundant, and accurate measurement of the house type cannot be achieved, an effective solution is not provided at present.
Disclosure of Invention
The utility model provides a wall surface measuring equipment and wall surface measuring method to at least solve the big error of work load that exists in the prior art that artifical handheld laser range finder measured house type, and laser scanner is with high costs and the data information redundancy that obtains, can't be to the accurate technical problem who measures of house type.
According to an aspect of the present application, there is provided a wall surface measuring apparatus including: a laser range finder; and a processor coupled to the laser rangefinder, wherein the processor is configured to perform the operations of: projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction through a laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and calculating coordinate information of the plurality of projection points according to the distance between the laser range finder and the plurality of projection points.
According to another aspect of the present application, there is provided a wall surface measuring method including: projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction by using a laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and calculating coordinate information of the plurality of projection points according to the distance between the laser range finder and the plurality of projection points.
Therefore, according to the technical scheme of the embodiment, the laser range finder, the rotating mechanism and the processor are arranged on the wall surface measuring equipment. And rotating the laser range finder through the rotating mechanism to project a plurality of projection points on the wall surface at preset interval distances. And when the projection point is not on the measured wall surface, the rotation angle of the rotating mechanism is reduced in sequence, namely the edge of the wall surface can be found through bisection. Therefore, the measured wall size can be calculated, and the technical effect of accurate measurement of house types is achieved. And then solved the big error of the work load that exists artifical handheld laser range finder measured the house type among the prior art big, and laser scanner is with high costs and the data information redundancy that obtains, can't be to the accurate measuring technical problem of house type.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic view of an arrangement of wall surface measuring devices according to a first aspect of an embodiment of the present application;
FIG. 2 is a schematic view of a laser rangefinder in the apparatus of the wall surface measuring device of FIG. 1;
FIG. 3 is a schematic circuit diagram of the laser rangefinder of FIG. 2;
FIG. 4 is a control circuit diagram of a rotary mechanism in the wall surface measuring device arrangement of FIG. 1;
FIG. 5A is a schematic view of a first measurement process of a wall surface measuring device according to the first aspect of the embodiment of the present application;
FIG. 5B is a schematic view of a second measurement process of the wall measurement device according to the first aspect of the embodiment of the present application;
FIG. 6 is a schematic workflow diagram of a wall surface measuring device according to a first aspect of an embodiment of the present application; and
fig. 7 is a schematic flow chart of a wall surface measuring method according to the second aspect of the embodiment of the present application.
Detailed Description
It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions of the present disclosure better understood by those skilled in the art, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing the embodiments of the disclosure herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Fig. 1 is a schematic view of a wall surface measuring device according to a first aspect of an embodiment of the present application, wherein, with reference to fig. 1 to 3, the present application provides a wall surface measuring device comprising: a laser range finder 102; and a processor 101 connected to the laser rangefinder 102, the processor 101 configured to perform the following operations: projecting a plurality of projection points on the wall surface at intervals in the horizontal and/or vertical direction by the laser rangefinder 102, and calculating distances between the laser rangefinder 102 and the plurality of projection points; and calculating coordinate information of the plurality of projection points according to the distances between the laser range finder 102 and the plurality of projection points.
Specifically, referring to fig. 1 to 3, the wall surface measuring apparatus includes a laser range finder 102 for emitting a laser beam to the measured wall surface, as shown in fig. 2, so that the distance between the wall surface measuring apparatus and the projection point projected on the wall surface can be calculated. And the processor 101 is connected with the laser range finder 102 and is used for controlling the laser range finder 102 to transmit and receive signals. And the processor 101 is configured to control the laser rangefinder 102 to project a plurality of projection points on the wall surface at intervals (which may be preset intervals) in the horizontal and/or vertical direction, wherein the distances between the plurality of projection points may all be preset intervals, for example. And the processor 101 may calculate the distance between the laser rangefinder 102 and the plurality of projection points. Fig. 3 shows a schematic diagram of the laser range finder 102 for distance measurement, in which the laser range finder 102 transmits a laser beam to a target through a transmitting circuit, receives the reflected laser beam through a receiving circuit, and finally calculates a time difference T between transmitted and received signals through the MCU. And the distance D between the laser distance meter 102 and the projection point can be calculated by the singlechip according to the light velocity V of the laser propagating in the air and the time difference T between the emission and the reception of the laser. The single chip microcomputer then calculates coordinate information of the plurality of projection points according to the distances between the laser range finder 102 and the plurality of projection points, wherein the processor 101 converts the projection points into their relative three-dimensional spatial coordinates.
As described in the background, most of the current measurement methods rely on manual measurement by hand-held tape measures or other instruments (laser range finders, etc.), and few expensive laser scanners are used to perform three-dimensional scanning to obtain point clouds for modeling. However, the traditional method for measuring the house type by manually holding the laser range finder or the tape measure has large workload, generally takes several hours after completely measuring the house type with the length of about 100 square meters, requires cooperation of multiple persons, and has large error of obtained data. The laser scanner mode is that the hardware cost is very high, dozens of millions of common scanners on the market are often, the operation is complex, the obtained mass point cloud data information is redundant, and the later three-dimensional modeling is complex.
In view of this, according to the technical solution of the present embodiment, a plurality of projection points are projected on the wall surface at intervals by the laser range finder, and the three-dimensional space coordinates of the projection points are calculated by the processor 101, so that the measurement information of the wall surface (for example, whether there is a protrusion or a depression) can be determined, and the measurement of the house type can be accurately performed. And then solved the big error of the work load that exists artifical handheld laser range finder measured the house type among the prior art big, and laser scanner is with high costs and the data information redundancy that obtains, can't be to the accurate measuring technical problem of house type.
Optionally, the wall surface measuring apparatus further comprises a rotating mechanism 103, the rotating mechanism 103 is fixed with the laser range finder 102 and connected with the processor 101, wherein the operation of projecting a plurality of projecting points on the wall surface at intervals along the horizontal and/or vertical direction by the laser range finder 102 comprises: projecting a first projection point on the wall surface by using the laser range finder 102, wherein the first projection point is a projection point projected when the laser emitted by the laser range finder 102 is perpendicular to the wall surface; and rotating the laser range finder 102 by the rotating mechanism 103 at a first angle, so that the laser range finder 102 projects a second projection point on the wall surface at a preset spacing distance along the horizontal and/or vertical direction with the first projection point as a reference point.
Specifically, referring to fig. 1 to 5B, the wall surface measuring apparatus further includes a rotating mechanism 103, wherein the rotating mechanism 103 may be a stepping motor, and fig. 4 shows a schematic diagram of a driving circuit for driving the stepping motor. Thus, the processor 101 may rotate the laser rangefinder 102 in the horizontal and vertical directions according to the preset spacing distance by the rotation mechanism 103, thereby causing the laser rangefinder 102 to project a plurality of projection points on the wall surface at intervals. Referring to fig. 5A, the wall surface measuring apparatus may project a first projection point a on the wall surface using the laser rangefinder 102, the first projection point a being a projection point projected when the laser emitted from the laser rangefinder 102 is perpendicular to the wall surface (for example, may be a geometric center point of the wall surface described later). The processor 101 then rotates the laser rangefinder 102 with the rotation mechanism 103 at a first angle a corresponding to a preset spacing distance (the spacing distance may be 30 cm described later). So that the laser range finder 102 projects the second projection point B in the horizontal and/or vertical direction on the wall surface at a preset interval distance with the first projection point a as a reference point. Therefore, the laser range finder 102 can be rotated according to the angle corresponding to the preset spacing distance to determine the second projection point B, and so on, and the measurement of the wall surface can be completed by projecting a plurality of projection points according to the preset spacing distance.
Alternatively, the operation of rotating the laser rangefinder 102 at the first angle with the rotating mechanism 103 includes: calculating a first angle according to a first distance between the laser range finder 102 and the first projection point and a second distance between the second projection point and the first projection point; and rotating the laser rangefinder 102 at the calculated first angle with the rotation mechanism 103.
Specifically, referring to fig. 5A, when the processor 101 rotates the laser rangefinder 102 at the first angle using the rotation mechanism 103, the first angle a may be calculated based on a first distance OA between the laser rangefinder 102 and the first projection point a, and a second distance AB between the second projection point B and the first projection point a (e.g., the second distance AB may be a preset separation distance, such as 30 centimeters). The processor 101 then rotates the laser rangefinder 102 at the first angle using the rotation mechanism 103 to project the second projection point B on the wall surface such that the distance between the second projection point B and the first projection point a satisfies the preset separation distance. By analogy, according to the method, a plurality of projection points can be projected on the wall surface according to the preset interval distance, and the measurement of the wall surface is completed.
Optionally, the wall surface measuring device further comprises: rotating the laser rangefinder 102 with the rotating mechanism 103 in the same rotational direction as the second projection point is projected by a second angle, and projecting a third projection point; and judging whether the third projection point is positioned on the wall surface according to the connecting line of the first projection point A and the second projection point and the included angle between the connecting line of the second projection point and the third projection point.
Specifically, referring to fig. 5A, the processor 101 may rotate the laser range finder 102 by a second angle B in the same rotational direction as the second projection point B is projected by using the rotation mechanism 103, the rotational direction being a base line AB formed by connecting the first projection point a and the second projection point B, and project the third projection point C. Then, the processor 101 may determine whether the third projection point C is located on the wall surface according to an angle d between a connection line AB between the first projection point a and the second projection point B and a connection line BC between the second projection point B and the third projection point C, that is, an angle d between two line segments. For example, in the case where the included angle d is 180 degrees, it is determined that the third projection point C is located on the measured wall surface. Therefore, by the mode, all the projection points can be projected on the same wall, and wrong wall information is prevented from being calculated.
Optionally, the operation of determining whether the third projection point is located on the wall surface includes: judging whether the included angle distance is 180 degrees or not; and under the condition that the included angle is not 180 degrees, judging that the third projection point is not on the wall surface.
Specifically, referring to fig. 5B, in the case where the included angle d between the connection line AB between the first projection point a and the second projection point B and the connection line BC between the second projection point B and the third projection point C is not 180 degrees, that is, in the case where the included angle d is other angles shown in fig. 5B, it is determined that the third projection point C is not on the measured wall surface, that is, it is determined that the third projection point C exceeds the edge of the wall surface. In this way it can be determined whether the projected point projected by the laser rangefinder 102 is beyond the edge of the measured wall surface.
Optionally, the wall surface measuring device further comprises: in a case where it is determined that the third projection point is not on the wall surface, the laser range finder 102 is rotated by the rotation mechanism 103 at a third angle smaller than the second angle with respect to the second projection point, and a fourth projection point is projected.
Specifically, as shown in fig. 5B, in the case where the third projection point C is not on the measured wall surface, that is, the angle d between the line AB connecting the first projection point a and the second projection point B and the line BC connecting the second projection point B and the third projection point C is not 180 degrees. With respect to the second projection point B, the laser range finder 102 is rotated by a third angle C with respect to the second projection point B by the rotation mechanism 103, and a fourth projection point C' is projected, wherein the third angle C is smaller than the second angle B. For example, the third angle c may be half the magnitude of the second angle b, i.e. the rotation angle of the rotating mechanism may be successively reduced and enlarged by bisection until the last measurement point of the wall edge is formed. And finally, calculating the size of the measured wall surface according to the distance between the projection point projected by the laser range finder 102 and the edge of the wall surface. Therefore, the edge of the measured wall surface can be accurately found through the method, and the measurement of the wall surface is further completed.
Further, according to a second aspect of the present embodiment, there is provided a wall surface measuring method. Fig. 7 shows a flow diagram of the method, and referring to fig. 7, the method comprises:
s402: projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction by using a laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and
s404: and calculating the coordinate information of the plurality of projection points according to the distances between the laser range finder and the plurality of projection points.
Optionally, the operation of projecting a plurality of projection points on the wall surface at intervals in a horizontal and/or vertical direction using a laser rangefinder comprises: projecting a first projection point on the wall surface by using the laser range finder, wherein the first projection point is projected when the laser emitted by the laser range finder is vertical to the wall surface; and rotating the laser range finder at a first angle to enable the laser range finder to project a second projection point on the wall surface along the horizontal direction and/or the vertical direction according to a preset spacing distance by taking the first projection point as a datum point.
Optionally, rotating the operation of the laser rangefinder comprises: calculating the first angle according to a first distance between the laser range finder and the first projection point and a second distance between the second projection point and the first projection point; and rotating the laser rangefinder according to the calculated first angle.
Optionally, the wall surface measuring method further includes: rotating the laser range finder by a second angle in the same rotational direction as the second projection point is projected, and projecting a third projection point; and judging whether the third projection point is positioned on the wall surface according to an included angle between a connecting line of the first projection point and the second projection point and a connecting line of the second projection point and the third projection point.
Optionally, the wall surface measuring method, which is an operation of determining whether the third projection point is located on the wall surface, includes: judging whether the included angle distance is 180 degrees or not; and under the condition that the included angle is not 180 degrees, judging that the third projection point is not on the wall surface.
Optionally, the wall surface measuring method further includes: and under the condition that the third projection point is not on the wall surface, rotating the laser range finder at a third angle relative to the second projection point and projecting a fourth projection point, wherein the third angle is smaller than the second angle.
Therefore, according to the technical scheme of the embodiment, the laser range finder, the rotating mechanism and the processor are arranged on the wall surface measuring equipment. And rotating the laser range finder through the rotating mechanism to project a plurality of projection points on the wall surface at preset interval distances. And when the projection point is not on the measured wall surface, the rotation angle of the rotating mechanism is reduced in sequence, namely the edge of the wall surface can be found through bisection. Therefore, the measured wall size can be calculated, and the technical effect of accurate measurement of house types is achieved. And then solved the big error of the work load that exists artifical handheld laser range finder measured the house type among the prior art big, and laser scanner is with high costs and the data information redundancy that obtains, can't be to the accurate measuring technical problem of house type.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A wall surface measuring device comprising: a laser range finder; and a processor coupled to the laser rangefinder, wherein the processor is configured to:
projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction through the laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and
and calculating the coordinate information of the plurality of projection points according to the distances between the laser range finder and the plurality of projection points.
2. The wall surface measuring apparatus of claim 1, further comprising a rotation mechanism fixed to the laser rangefinder and connected to the processor, wherein the operation of projecting a plurality of projection points on the wall surface at intervals in a horizontal and/or vertical direction using the laser rangefinder comprises:
projecting a first projection point on the wall surface by using the laser range finder, wherein the first projection point is projected when the laser emitted by the laser range finder is vertical to the wall surface; and
and rotating the laser range finder at a first angle by using the rotating mechanism, so that the laser range finder projects a second projection point on the wall surface along the horizontal direction and/or the vertical direction according to a preset spacing distance by using the first projection point as a datum point.
3. The wall surface measuring apparatus of claim 2, wherein rotating the laser rangefinder with the rotating mechanism at a first angle comprises:
calculating the first angle according to a first distance between the laser range finder and the first projection point and a second distance between the second projection point and the first projection point; and
rotating the laser rangefinder at the calculated first angle with the rotation mechanism.
4. A wall surface measuring apparatus as defined in claim 3, further comprising:
rotating the laser range finder by a second angle in the same rotational direction as the second projection point is projected by the rotating mechanism, and projecting a third projection point; and
and judging whether the third projection point is positioned on the wall surface according to an included angle between a connecting line of the first projection point and the second projection point and a connecting line of the second projection point and the third projection point.
5. The wall surface measuring apparatus of claim 4, wherein the operation of determining whether the third projection point is located on the wall surface comprises:
judging whether the included angle distance is 180 degrees or not; and
and under the condition that the included angle is not 180 degrees, judging that the third projection point is not on the wall surface.
6. A wall surface measuring apparatus as defined in claim 4, further comprising:
in the case that the third projection point is judged not to be on the wall surface, rotating the laser range finder at a third angle by using the rotating mechanism relative to the second projection point, and projecting a fourth projection point, wherein
The third angle is less than the second angle.
7. A wall surface measuring method is characterized by comprising the following steps:
projecting a plurality of projection points on the wall surface at intervals along the horizontal and/or vertical direction by using a laser range finder, and calculating the distance between the laser range finder and the plurality of projection points; and
and calculating the coordinate information of the plurality of projection points according to the distances between the laser range finder and the plurality of projection points.
8. The wall surface measuring method according to claim 7, wherein the operation of projecting a plurality of projection points on the wall surface at intervals in a horizontal and/or vertical direction using a laser rangefinder includes:
projecting a first projection point on the wall surface by using the laser range finder, wherein the first projection point is projected when the laser emitted by the laser range finder is vertical to the wall surface; and
and rotating the laser range finder at a first angle to enable the laser range finder to project a second projection point on the wall surface along the horizontal direction and/or the vertical direction according to a preset spacing distance by taking the first projection point as a datum point.
9. The wall surface measuring method of claim 8, wherein rotating the laser rangefinder comprises:
calculating the first angle according to a first distance between the laser range finder and the first projection point and a second distance between the second projection point and the first projection point; and
rotating the laser range finder according to the calculated first angle.
10. The wall surface measuring method according to claim 9, further comprising:
rotating the laser range finder by a second angle in the same rotational direction as the second projection point is projected, and projecting a third projection point;
and judging whether the third projection point is positioned on the wall surface according to an included angle between a connecting line of the first projection point and the second projection point and a connecting line of the second projection point and the third projection point.
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| CN201910893833.8A CN112539739A (en) | 2019-09-20 | 2019-09-20 | Wall surface measuring device and wall surface measuring method |
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| CN201910893833.8A CN112539739A (en) | 2019-09-20 | 2019-09-20 | Wall surface measuring device and wall surface measuring method |
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| CN101922912A (en) * | 2010-07-22 | 2010-12-22 | 北京矿冶研究总院 | Three-dimensional laser scanning measurement method and device |
| US20140202013A1 (en) * | 2012-01-25 | 2014-07-24 | Michael Vincent Smith | Laser Generated Measuring Device |
| US20150176987A1 (en) * | 2013-12-19 | 2015-06-25 | Symbol Technologies, Inc. | Method and apparatus for identifying an edge of an object using laser distance measurement |
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