13results about "Permanant marks" patented technology

The application discloses a method for designing and calibrating a detection site of an unmanned aerial vehicle based on high-precision positioning, comprising the following steps: S1, setting a main control point and a standard point; S2, performing static relative measurement and free station measurement, and outputting a reference coordinate data set; S3, introducing a Boolean sand model, calculating accurate three-dimensional coordinate values of the main control point, evaluating residual errors, and generating reference data of the main control point; S4, performing multi-station redundant observation on the standard point, and outputting accurate coordinate data of the standard point; S5, constructing an improved Hamilton Monte Carlo-based Bayesian inference model, introducing a Gaussian mixture prior guide factor, calculating a posterior probability distribution and an extended uncertainty, and generating a calibration data report; and S6, performing independent measurement and comparative analysis, and outputting a final calibration result. The application realizes accurate measurement of point coordinates of a detection site and scientific evaluation of uncertainty, and effectively improves the reliability and robustness of value traceability.

The invention discloses a benchmark protection device, and relates to the technical field of benchmark protection, the benchmark protection device comprises a shell assembly, the shell assembly comprises a protection shell, the lower end of the protection shell is provided with a protection shell gasket, the upper end of the protection shell is provided with a cover plate, and a cover plate gasket is arranged between the protection shell and the cover plate; the opening and closing assembly comprises a connecting plate, a first rotating rod, a second rotating rod, a spring, a clamping piece, a pressing piece and a limiting piece; the box staff fixing assembly comprises a benchmark, a ball bearing and a box staff rotating bin. The beneficial effects of the invention are that through the cooperation of the cover plate and the opening and closing assembly, the protection shell is closed and opened, under the action of the clamping piece, the cover plate is ensured to be closed tightly, and the cover plate is kept open stably without affecting the measurement under the action of the internal force of the opening and closing assembly during opening; the benchmark is protected through the protective shell, the benchmark is prevented from being corroded and damaged by rainwater, dust and the like, durability of the benchmark can be better guaranteed, the telemeter rod fixing assembly is matched, a telemeter rod can be better fixed during measurement, manpower is saved, and meanwhile the measurement accuracy can be improved.

Two-dimensional targets, such as AprilTags, are used as control points. AprilTags can be used as cost effective alternatives to traditional prism targets without losing accuracy. AprilTags can be placed precisely around a construction site as "permanent" survey control points, like positioning reflector targets. A robotic total station, equipped with a camera sensor, can image the two-dimensional targets to efficiently resection itself.

A method including: recording a first image of a first field region; automatically treating a plant within the first region in-situ based on the first image: automatically verifying the plant treatment with a second image of the first region; and automatically treating a second region concurrently with treatment verification.

Provided is a surveying instrument that reduces the burden of a centering work on a worker. A surveying instrument (1) capable of irradiating a spotlight (SL) as visible light for centering toward a position below a vertical axis of a surveying instrument main body (12) is configured such that that an irradiation shape of the spotlight (SL) is a toric shape. When visible light for centering which passes through a center point (O) of the surveying instrument (1) and is projected on a position right below the surveying instrument (1) is projected in a toric shape having a hole opened at a center like a donut shape, both of an inner circle and an outer circle can be recognized, and an outer shape of a measuring object on which a target point is set can also be used for alignment with the target point, so that many guides are provided, and it is easier for a worker to align the toric shape with the target point than a point shape, so that the burden of a centering work on the worker is reduced.

To provide a surveying instrument that reduces a burden of centering work on a worker.SOLUTION: In a surveying instrument (1) capable of irradiating with, spotlight (SL) as visible light for centering toward a position below a vertical axis of the surveying instrument main body (12), the spotlight (SL) is configured that an irradiation shape is an annular shape. When visible light for centering, which passes through a center point (O) of the surveying instrument 1 and is projected on a position right below the surveying instrument (1), is projected in an annular shape having a hole opened at a center like a doughnut, both of an inner circle and an outer circle can be recognized, an outer shape of a measuring object having a target point can be used for target point alignment, there are many marks, and it is easier for a worker to align the annular shape with the target point than a point shape, so that a burden of centering work on the worker is reduced.SELECTED DRAWING: Figure 1

A setting-out method, a measurement system (500), and a computer readable medium. The setting-out method is used for the measurement system (500). The measurement system (500) comprises a navigation module (1, 501), a laser ranging module (2, 502), and a centering rod (6, 503). The navigation module (1, 501) comprises an inertial measuring unit and a GNSS positioning unit. The setting-out method comprises: acquiring projection coordinates of a position vector of an antenna phase center in a first coordinate system by means of a GNSS positioning unit; acquiring distance information between a laser emission point and a laser irradiation point; on the basis of the projection coordinates and the distance information, calculating projection coordinates of the laser emission point in the first coordinate system and projection coordinates of the laser irradiation point in the first coordinate system; further calculating a corresponding setting-out error; and adjusting the centering rod (6, 503) on the basis of the setting-out error.

A lofting method, a multifunctional measurement apparatus and a computer-readable medium. The lofting method is used for a multifunctional measurement apparatus (500). The multifunctional measurement apparatus (500) includes a navigation module (1, 501) and a laser ranging module (2, 502), wherein the navigation module (1, 501) includes an inertial measurement unit. The lofting method includes: calculating plane projection coordinates of a laser irradiation point in a first coordinate system (S101); acquiring plane projection coordinates of a point to be lofted in the first coordinate system (S102); calculating a lofting error in a second coordinate system on the basis of the obtained coordinates (S103); and adjusting the position of the laser irradiation point on the basis of the lofting error until the laser irradiation point coincides with the point to be lofted within a lofting error range (S104). In the lofting method, a laser ranging module (2, 502) is used instead of a centering rod, so that a user can carry a multifunctional measurement apparatus and operate same conveniently, and it is only necessary to move a laser irradiation point in situ to implement long-distance lofting.

To provide a marker which is easily manufactured and has high accuracy.SOLUTION: The relative position calculation method is a relative position calculation method using a marker 1 including a base material layer 10, a first layer 20 laminated on one surface of the base material layer 10 and observed in a first color, and a second layer 30 partially laminated on the first layer 20 and observed in a second color different from the first color and partially concealing the first layer 20, the first layer 20 being observable in a region where the second layer 30 is not laminated, the second layer 30 being formed of a resist material, the relative position calculation method including a step of photographing the marker attached to an object to be measured by a camera, and a step of calculating a relative positional relationship between the camera and the marker by a control unit.SELECTED DRAWING: Figure 1

Location systems and methods for locating paint and other markings on a surface are described. More specifically, but not exclusively, the disclosure relates to smart paint stick devices and methods for locating and marking buried utility lines or other buried objects. One system for locating a buried object may include a buried object locator and paint stick. The locator may include a tracking component for detecting a location of a buried object. The paint stick may be configured to cause a paint container to dispense paint at a first position associated with the location of the buried object. The paint stick may include a position determination component for transmitting one or more range vector signals that are detected by the tracking component. Sensors may be used to determine when paint is dispensed from a paint container, and to determine a color of the paint or a type of a marking.

An unevenness level inspecting device includes a target T at a known distance from a to-be-inspected surface, a traveling unit for traveling on the to-be-inspected surface, a first marker for marking information on the to-be-inspected surface, and a control unit configured to control the first marker, and the control unit calculates a height of the to-be-inspected surface at a measurement position of the target T based on three-dimensional position coordinates of the target input each time the unevenness level inspecting device travels a predetermined distance, and controls the first marker so as to mark unevenness level information indicating a difference between the height of the to-be-inspected surface and a reference height on a corresponding position on the to-be-inspected surface, and the unevenness level information is marked in a color that differs depending on a magnitude of the difference between the height of the to-be-inspected surface and the reference height.