Survey mark

Abstract

A surveying marker (100, 200, 300, 400) for measuring a reference point, for example on a surveying object, comprises a reflection object (102, 202, 302) having a spherical surface (104). The spherical surface (104) of the reflection object (102, 202, 302) has a diameter in a range of 10 to 50 mm, preferably in a range of 20 to 40 mm. In a further aspect, a method for measuring a surveying object is disclosed.

Description

Technical field

[0001] The invention relates to a surveying mark for measuring a reference point, as well as a method for measuring a surveying object. Background of the invention

[0002] Survey markers are typically attached to stationary objects such as buildings or, near railway tracks, to power poles. They can mark a reference point that is to be measured using conventional measuring instruments such as laser scanners, stereo cameras, or total stations. Surveying methods are often based on electro-optical processes, so survey markers usually include complex optical elements, such as triple mirrors. These survey markers are susceptible to damage and must be regularly adjusted to measure them from different directions.

[0003] The object of the invention is to provide a robust surveying marker and a method with which a reference point can be measured easily and quickly using a tachymeter.

[0004] This object is achieved by the subject matter of the independent claims. Advantageous further developments are specified in the dependent claims and the following description. Summary

[0005] A surveying marker for measuring a reference point, for example, on a surveying object, comprises a reflective object having a spherical surface. The spherical surface of the reflective object has a diameter in a range of 10 to 50 mm, preferably in a range of 20 to 40 mm. It is particularly preferred that the spherical surface has a diameter of 30 mm.

[0006] The spherical surface of the reflection object is, in particular, an outer surface of the reflection object. The spherical surface of the reflection object preferably points away from a center point of the reflection object.

[0007] The spherical surface of the reflective object makes it easy to capture the survey mark from different directions, particularly without having to change the orientation of the survey mark or the reflective object. Furthermore, the characteristics of the survey mark enable a robust and compact design. Furthermore, the dimensions of the reflective object enable reliable and reproducible targeting or sighting of the survey mark, particularly with the aid of a total station or tachymeter. For example, the reflective object enables easy and precise targeting or sighting of the survey mark using the total station's crosshairs. Using an electro-optical rangefinder on the total station, a distance measurement between the total station and the survey mark, particularly the reflective object, is then possible.The survey mark can be targeted and measured using a tachymeter, for example, at a maximum distance of 200 m, 150 m, 100 m, or 50 m. In particular, an accuracy in the range of 1 to 2 mm is possible. The survey mark is specifically designed for measuring a reference point using a tachymeter.

[0008] The reflection object preferably has a spherical element and a shell element arranged around the spherical element, wherein the shell element comprises the spherical surface and a reflective foil is arranged between the spherical element and the shell element. This enables particularly reliable distance determination with the aid of an electro-optical rangefinder of a tachymeter. The spherical surface is, for example, an outer side of the shell element, and the foil is arranged on an inner side of the shell element. The foil is, in particular, spherical, corresponding to the spherical surface of the reflection object. The reflective foil can, for example, be a metal foil or a reflective foil. The reflective foil preferably comprises retroreflective elements.

[0009] Preferably, the reflection object is made of a plastic, particularly a light-colored plastic. This enables a simple and robust design of the surveying marker. The light color of the reflection object makes it easy to target the reflection object using a tachymeter. For example, the reflection object can be made of a white or gray plastic. Furthermore, the reflection object is, in particular, not made of a black plastic. For example, the spherical element and the shell element can be made of plastic.

[0010] Preferably, the reflection object is made of metal, particularly aluminum or steel. This allows for a simple and robust construction of the survey marker.

[0011] Preferably, at least the spherical surface is fluorescent. This allows the survey mark to be targeted regardless of ambient lighting conditions. For example, the spherical surface may comprise a fluorescent paint. As another example, the spherical surface may be made of a fluorescent plastic.

[0012] Preferably, the survey marker comprises a holder, with the reflective object being connected to the holder. The holder allows for easy attachment of the survey marker to a survey object, for example, a wall. Preferably, the reflective object is connected to the holder at two points opposite each other along the spherical surface.

[0013] Preferably, the reflection object is arranged at a distance from the mount, for example, using a cylindrical object. The cylindrical object allows for easy targeting of the reflection object using a tachymeter.

[0014] The reflection object can preferably comprise at least one targeting mark. This enables reliable targeting of the reflection object using a tachymeter. The targeting mark is arranged, in particular, on the spherical surface. If there are a plurality of targeting marks, these are preferably arranged uniformly on the spherical surface. The targeting marks can, for example, be cylindrical elevations on the spherical surface. Alternatively or additionally, the targeting mark can be arranged on the spherical surface along a plane that intersects the rotation axis of the spherical surface.

[0015] In a further aspect, a method for surveying a survey object is provided. The method comprises the following steps: targeting at least one survey mark arranged on the survey object with the aid of a tachymeter, and determining at least one measured value, in particular with the aid of the tachymeter, in relation to the at least one targeted survey mark. For example, the survey mark, in particular a reflection object of the survey mark, can be targeted with the aid of the tachymeter, in particular a total station. Subsequently, the distance to the survey mark, for example, can be determined with the aid of an electro-optical rangefinder, such as a laser rangefinder, of the tachymeter.

[0016] When targeting the survey mark, for example, the total station's crosshairs can be centered on the survey mark, in particular on the reflection object of the survey mark. In this way, the center of the survey mark, in particular the reflection object of the survey mark, is targeted. The center of the reflection object of the survey mark can serve as the reference point. Alternatively, the survey mark can be positioned at a reference point to be measured such that the center of the reflection object is at a defined distance from this reference point.

[0017] The survey mark of the procedure may in particular have features of the survey marks described in this document.

[0018] The method preferably comprises the step of providing dimensional information of the at least one targeted surveying mark. Providing the dimensional information makes it possible to take properties of the surveying mark into account, in particular in the step of determining at least one measured value. The dimensional information of the surveying mark can, for example, comprise dimensions of the surveying mark, in particular of the reflection object. In particular, the dimensional information comprises at least one radius of a spherical surface of the reflection object. The dimensional information can, in particular, be determined and / or provided before the step of targeting the surveying mark.

[0019] Preferably, in the step of determining the at least one measured value, the measured value is determined based on the dimensional information. This enables precise measurement of the survey object. For example, the dimensional information includes the radius of the spherical surface of the reflection object. Thus, with the aid of the dimensional information, in particular the radius, the distance to a center point of the reflection object of the targeted survey mark can be determined. The spherical surface of the reflection object makes it possible to determine the distance to the center point of the reflection object from a variety of different directions.For example, the distance to the center of the reflection object can be determined using the tachymeter at least from a first position of the tachymeter and from a second position of the tachymeter, in particular without requiring any adjustment or realignment of the reflection object. This enables particularly precise measurement of the survey object, especially from different directions.

[0020] Furthermore, the dimensional information includes, for example, information about the material of the reflection object or the color of the reflection object, especially the spherical surface. Thus, the dimensional information can generally include information that can influence an electro-optical distance measurement using a tachymeter. For example, when measuring distance using a laser, the penetration depth into the material of the reflection object can be taken into account.

[0021] Thus, with the aid of the measurement information, a particularly accurate and at the same time simple determination of at least one measured value and measurement of the object being measured can be achieved.

[0022] The procedure can be further developed using the characteristics of the survey mark. Short description of the characters

[0023] Further features and advantages will become apparent from the following description, which explains exemplary embodiments in more detail in conjunction with the attached figures.

[0024] They show: Fig. 1 a schematic view of a first survey mark, Fig. 2 a schematic view of a second survey mark, Fig. 3 a schematic view of a third survey mark, and Fig. 4 a schematic view of a fourth survey mark. Detailed description

[0025] Fig. 1 is a schematic view of a survey marker 100. The survey marker 100 includes a reflection object 102 having a spherical surface 104. Furthermore, the survey marker 100 includes a holder 106. The reflection object 102 is connected to the holder 106.

[0026] With the aid of the holder 106, the survey mark 100 can be arranged on a survey object. In particular, the survey mark 100 can be fastened with the aid of the holder 106 in a defined position relative to a reference point of the survey object. For this purpose, the holder 106 can comprise a receptacle for a fastening system and / or an alignment mark in order to align and fasten the holder 106 or the survey mark 100 in the defined position relative to the reference point of the survey object.

[0027] The spherical surface 104 of the reflection object 102 has a diameter in a range of 10 to 50 mm, preferably in a range of 20 to 40 mm. The dimensions of the reflection object 102 enable reliable targeting of the reflection object 102 and thus of the surveying mark 100, for example, with the aid of a tachymeter. For this purpose, the reflection object 102 can be targeted, for example, with the aid of the tachymeter's target acquisition optics. The omission of complex optical elements, such as triple mirrors, enables a robust and simple design of the surveying mark.

[0028] The spherical shape of the surface 104 makes it possible to reliably target the reflection object 102 and thus the survey mark 100 from a variety of directions without the need to reorient the reflection object 102 in each respective direction.

[0029] Fig. 2 is a schematic view of a survey marker 200. The survey marker 200 includes a reflection object 202 having the spherical surface 104. Furthermore, the survey marker 200 includes a holder 204. The reflection object 202 is connected to the holder 204.

[0030] The reflection object 202 has a targeting mark 206 extending around the circumference of the spherical surface. The targeting mark 206 lies in a plane that intersects the rotation axis of the spherical surface 104. The targeting mark 206 enables easy targeting of the reflection object 202 using a tachymeter. In particular, the center or midpoint of the reflection object 202 can be reliably targeted.

[0031] The reflection object 202 can be spaced from the holder 204, for example, by means of a cylindrical element 208. In particular, the reflection object 202 is spaced from the holder 204 in a direction perpendicular to the plane of the target mark 206. Furthermore, a cylinder axis of the cylindrical element 208 is perpendicular to the plane of the target mark 206.

[0032] The holder 204 can preferably have a support surface 210 facing away from the reflection object 202, which is parallel to the plane of the target mark 206. The support surface can, for example, rest on a survey object on which the survey mark 200 is arranged. This allows the target mark 206 to be precisely aligned with the survey object.

[0033] Fig. 3 is a schematic view of a survey mark 300. The survey mark 300 includes a reflection object 302 having the spherical surface 104. Furthermore, the survey mark 300 includes the holder 204 to which the reflection object 302 is connected.

[0034] The reflection object 302 further includes targeting markings 304. The targeting markings 304 are cylindrical elements that protrude outward from the spherical surface 104. Alternatively, the targeting markings 304 can be recessed from the spherical surface 104. The targeting markings 304 enable easy targeting of the reflection object 302 using a tachymeter. In particular, the center or midpoint of the reflection object 302 can be reliably targeted in this way.

[0035] Fig.4 is a schematic view of a survey mark 400. The survey mark 400 includes the reflection object 202 with the spherical surface 104. Furthermore, the survey mark 400 includes a holder 404 to which the reflection object 202 is connected.

[0036] The reflection object 202 is connected to the holder 404 at two opposite points along the spherical surface 104.

[0037] The surveying marks 100, 200, 300, 400 can be used in particular in a method for surveying a surveying object. At least one surveying mark 100, 200, 300, 400 arranged on the surveying object is targeted using a tachymeter. For this purpose, the respective reflection object 102, 202, 302 can be targeted, for example, using a target acquisition optics of the tachymeter. In particular, a center of the reflection object 102, 202, 302 is targeted. The dimensions of the reflection objects 102, 202, 302 enable simple and reproducible targeting of the reflection objects 102, 202, 302 using the target acquisition optics of the tachymeter.

[0038] Furthermore, the method determines a measured value with the aid of the tachymeter in relation to the at least one targeted survey mark 100, 200, 300, 400, in particular the respective reflection object 102, 202, 302. In particular, a distance to the targeted survey mark 100, 200, 300, 400 can be determined.

[0039] Preferably, the method provides dimensional information of the survey mark 100, 200, 300, 400. The provided dimensional information can then be taken into account when determining the measured value. For example, the radius of the spherical surface 102 can be taken into account when determining the measured value. Thus, taking the dimensional information into account, the center point or the center of the spherical surface 102 can be determined. The spherical shape of the surface 102 further enables the center of the spherical surface 102 to be determined from a variety of directions, taking the radius into account. Reorientation or adjustment of the reflection object 102, 202, 302 is not necessary for this. List of reference symbols 100, 200, 300, 400 survey mark 102, 202, 302 reflection object 104 Spherical surface of the reflection object 106, 204, 404 bracket 206, 304 Target Mark 208 spacer element 210 contact surface

Claims

[1] Surveying mark (100, 200, 300, 400) for measuring a reference point, with a reflection object (102, 202, 302) having a spherical surface (104), and wherein the spherical surface (104) of the reflection object (102, 202, 302) has a diameter in a range of 10 to 50 mm, preferably in a range of 20 to 40 mm. [2] Surveying mark according to claim 1, wherein the reflection object (102, 202, 302) comprises a spherical element and a shell element arranged around the spherical element, the shell element comprising the spherical surface and a reflective film being arranged between the spherical element and the shell element. [3] Surveying mark according to one of the preceding claims, wherein the reflection object (102, 202, 302) is made of a plastic. [4] Surveying mark according to claim 1, wherein the reflection object (102, 202, 302) is made of a metal. [5] Surveying mark according to one of the preceding claims, wherein at least the spherical surface (104) is fluorescent. [6] Surveying mark according to one of the preceding claims comprising a holder (106, 204, 404), wherein the reflection object (102, 202, 302) is connected to the holder (106, 204, 404). [7] Surveying mark according to claim 6, wherein the reflection object (102, 202, 302) is connected to the holder (106, 204, 404) at two opposite points along the spherical surface (104). [8] Method for measuring a survey object with the following steps: Targeting at least one survey mark (100, 200, 300, 400) arranged on the survey object, in particular according to one of the preceding claims, with the aid of a tachymeter, and Determining at least one measured value in relation to the at least one targeted survey mark (100, 200, 300, 400). [9] The method of claim 8, wherein the method comprises: providing dimensional information of the at least one targeted survey mark (100, 200, 300, 400). [10] The method according to claim 9, wherein in the step of determining the at least one measured value, the measured value is determined based on the measurement information.

Images