Surveying rod and surveying setup

Abstract

Surveying rod (10) comprising a rod body (12), in particular with a receptacle for a receiver, in particular a GNSS receiver, with a first end (13) of the rod body (12) and a rod tip (14) at a second end (18) of the rod body (12) and a distance measuring device (20) connected to the surveying rod (10), wherein the distance measuring device (20) emits a distance measuring laser beam (22a) directed from the distance measuring device (20) towards a target to be measured, characterized in that the distance measuring device (20) additionally emits a directional laser beam (22b) which is also directed towards the target to be measured and / or towards an area immediately adjacent thereto, wherein the directional laser beam (22b) emits in a different wavelength range than the distance measuring laser beam (22a).

Description

[0001] The invention relates to a surveying rod comprising a rod body, in particular with a receptacle for a receiver, preferably a GNSS receiver, with a first end of the rod body, which is preferably directed away from the ground in the operating position, and a rod tip at a second end of the rod body. The surveying rod includes a distance measuring device, wherein the distance measuring device is arranged in or on the surveying rod such that the distance measuring device emits a distance measuring laser beam in the longitudinal direction of the survey beam.

[0002] In civil engineering, it is common practice to carry out surveys before, during or after a construction phase for staking out construction elements or for creating as-built drawings.

[0003] One known method is real-time kinematic surveying, which utilizes satellite-based navigation systems. This allows for high accuracy. In addition to a so-called "reference station," namely a first antenna, a second antenna, the so-called "rover," is required. Its position relative to the reference station is determined using a three-dimensional method. This rover is typically a GNSS receiver, especially a GPS receiver.

[0004] The reference stations can be temporary or permanent.

[0005] Such terrain surveys using a GNSS receiver have become standard practice in construction and are particularly useful for staking out and creating as-built surveys during the construction phase. The receiver is typically mounted at one end of a surveying pole, a so-called "rover," so that the receiver or rover points essentially vertically upwards. The terms "receiver," "rover," and "GNSS receiver" are used synonymously here, unless the context indicates otherwise.

[0006] It is important to know the distance between the rover and the component being measured in order to perform accurate measurements. To measure the correct height with a rover, the surveying (rover) pole must be placed directly on the element being measured (e.g., curbstone, manhole cover, survey point, water pipe). The pole height is usually read from a scale printed on the pole and manually entered into the surveying software. If the entry is forgotten or the user makes a typo, very troublesome measurement errors occur, which cannot be corrected, especially when surveying an open trench after it has been backfilled. Furthermore, not every element to be measured is easily or even accessible, for example, in deep trenches or when the pole cannot be held straight, such as when it is directly against a wall.

[0007] It is also known to provide an inclination measuring device in the rover, e.g. an internal spirit level that detects and takes into account any inclination of the surveying rod.

[0008] Furthermore, laser measuring devices are also known that allow distance measurement from the device to an element. One example is EP 3 182 066 A1, which describes a laser-based measurement between a receiver and a target located on the ground.

[0009] The object of the present invention is to provide a measuring rod that is versatile and makes it particularly easy to measure the height of the receiver above an element to be measured simply and precisely.

[0010] The invention solves this problem by means of a surveying rod with the features of claim 1.

[0011] The surveying rod conventionally comprises a rod body. A receptacle for a receiver, in particular a GNSS receiver, can preferably be provided at one end.

[0012] The surveying rod comprises a first end and a tip at a second end of the rod body. The first end of the rod body carries the receiver, if provided.

[0013] Furthermore, a distance measuring device is provided, which is connected to the surveying rod. The distance measuring device emits a distance-measuring laser beam, which is directed from the device towards a target to be measured. It also emits a further laser beam, which is likewise directed towards the target to be measured and / or towards an area immediately adjacent to it. This further laser beam is designed as a pegged laser beam and emits in a different wavelength range than the distance-measuring laser beam.

[0014] The two laser beams, namely the distance measuring laser beam and the sighting laser beam, allow for particularly simple positioning and sighting of the point to be measured.

[0015] For the distance measuring laser, a laser can be selected that offers the greatest measurement precision. However, such lasers often have the disadvantage of being difficult for the human eye to see. By incorporating a second laser beam, namely the aiming beam, this is specifically designed for good visibility. This allows the operator to align the measuring rod, especially its tip, towards the point to be measured. The aiming beam then allows them to clearly see, even at a greater distance, whether the rod tip, and thus the distance measuring laser beam, is directed at the correct point. This positively influences the measurement accuracy.

[0016] In a particularly preferred embodiment, the distance-measuring laser beam can be emitted in the visible, red, and / or infrared wavelength range. It is particularly preferred that the distance-measuring laser beam is emitted in the range of 620 to 690 nm, particularly between 630 and 670 nm and especially between 640 and 655 nm. In principle, the red light range can also extend to or above 690 nm, particularly up to 780 nm. Furthermore, a wavelength greater than 780 nm, i.e., in the near-infrared or infrared range, is also conceivable. In another preferred embodiment, the laser beam can be emitted in the visible green wavelength range, since this wavelength range is particularly well perceived by the human eye.It is particularly preferred that the puncture laser beam is emitted in the visible green wavelength range, particularly in the range of 459 to 566 nm, and especially preferably in the range of 520 to 540 nm.

[0017] Furthermore, it is particularly preferred if the wavelength ranges of the distance-measuring laser beam and the aiming laser beam differ by at least 30 nm, in particular at least 40 nm, and in particular at least 50 nm. It is especially preferred if the difference in wavelengths is such that the aiming laser beam is emitted in a different color than the distance-measuring laser beam.

[0018] While a distance-measuring laser emitting in the red and / or infrared visible range enables particularly accurate measurements, the red and / or infrared dot projected by the laser onto the object being measured is difficult or impossible for the human eye to detect, especially at greater distances. In contrast, a marking created by a laser in the visible green wavelength range is particularly easy for the human eye to perceive.

[0019] It is particularly preferred that the two beams, the distance-measuring laser beam and the aiming laser beam, run parallel to each other, especially in close proximity, or intersect at the target to be measured (target point or target area), or approach each other at the target to be measured. In this way, it can be ensured that the aiming laser is also directed at the target to be measured, and thus the distance-measuring laser beam is also aligned with the target to be measured. In this way, an accurate measurement can be guaranteed.

[0020] Such a design is achieved in particular by using two different laser diodes to generate the distance measuring laser beam and the pointing laser beam.

[0021] Alternatively, a design is conceivable in which both laser beams are generated by the same laser diode. In this case, the beams for the aiming laser and the distance-measuring laser are emitted intermittently or in a desired temporal sequence, each within the desired wavelength range. For example, it could be configured that the aiming laser beam is emitted as the standard configuration, and only when it is positioned is the system switched to the distance-measuring laser beam, which is then emitted by the same laser diode and the measurement is performed.

[0022] In principle, it is also conceivable to use a similar configuration with two independent laser diodes, one emitting the aiming laser beam and the other the distance-measuring laser beam. For example, the standard configuration could be to emit only the aiming laser beam, which is then triggered either by the user or automatically if the aiming laser beam remains stationary for a certain period of time, at which point a measurement laser beam is emitted, and the measurement is then performed.

[0023] In particular, the distance measuring laser or the pike laser emits light in the axial direction of the surveying rod.

[0024] Furthermore, it is possible that the distance measuring device is permanently or detachably connected to the surveying rod, in particular to the rod body or the rod tip.

[0025] A design in which the distance measuring device is permanently attached to the surveying rod offers the advantage that the logistical effort for storing and providing the distance measuring device can be reduced, and in particular, two devices (surveying rod and distance measuring device) do not have to be kept separately.

[0026] A particularly space-saving arrangement involves integrating the distance measuring device into the surveying rod, specifically the rod body or tip. This facilitates particularly easy handling. In this case, the two laser beams—the aiming laser beam and the distance measuring laser beam—can exit the rod body, and especially the tip.

[0027] According to an alternative and equally preferred embodiment, the distance measuring device can be detachably connected to the surveying rod, in particular the rod body. This offers particular advantages with regard to retrofitting existing surveying rods and also increases the flexibility of use. Furthermore, such detachable distance measuring devices can then also be used separately from the rod body and can, if necessary, be attached to other devices, such as a carrier vehicle like an excavator, and used with it or as a handheld distance measuring device.

[0028] In particular, when the distance measuring device is arranged separately or detachably, but preferably also when it is integrated, it is provided that it is housed in a casing and can be fixed to the measuring rod by means of the casing. This facilitates installation, as well as separate storage, transport, and use of the distance measuring device.

[0029] When the surveying rod accommodates the distance measuring device, it is particularly advantageous for the rod body to have a longitudinally extending cavity, preferably extending over the entire length of the rod body, with an opening provided in the region of the rod tip, and in particular, the rod tip being open at its end facing away from the rod body. This results in a particularly slender, albeit slightly heavier, design for the surveying rod, which, however, can be very well balanced due to the central arrangement of the distance measuring device within the rod body.

[0030] In a further embodiment, the rod tip can be either detachably or permanently attached to the rod body. This offers the possibility of replacing the rod tip and, if the distance measuring device is arranged separately and detachable from the surveying rod, or is not currently in use when integrated into the rod body, of using a closed rod tip. Furthermore, the rod tip can be replaced more easily in case of wear.

[0031] At the same time, however, the alternative of a fixed rod tip offers a particularly simple design.

[0032] In a particularly preferred embodiment, the rod tip can have at least two, preferably three, individual points at its end furthest from the rod body, distributed around the circumference of the rod tip and tapering longitudinally towards the free end, with a central opening in particular being arranged between the individual points. This allows for particularly easy positioning while simultaneously minimizing the tendency of the rod tip to become soiled.

[0033] Furthermore, it is planned that the surveying rod will have an inclined measuring device.

[0034] Particularly if the distance measuring device is housed in a casing, the casing may be attached to the rod body, for example, by clamping or snapping, or via a screw connection, etc. In principle, all force-fit and form-fit connection types or fasteners are conceivable if a detachable connection is required. Alternatively, force-fit and form-fit connections may be used that cannot be undone without damage or are not designed for easy and repeated removal.

[0035] The distance measuring device is particularly preferably designed to be very compact, both to minimize the weight that needs to be attached to the surveying rod and to facilitate the transport and storage of this additional device. Furthermore, the balance, and thus the holding and positioning of the surveying rod, is also improved if the distance measuring device, provided it is positioned off-center to the surveying rod, is particularly small and lightweight and located as close to the rod as possible.

[0036] In a further embodiment, the distance measuring device may not be designed as a single component, but rather as two components, one of which is arranged within the measuring rod and the other as a separate component, either permanently connected to the measuring rod or attached externally to the measuring rod. Each component of the distance measuring device may emit one or both laser beams.

[0037] Further advantages and features of the invention will become apparent from the following description and exemplary embodiment as well as the claims.

[0038] The drawing shows various embodiments of a surveying rod according to the invention.

[0039] This shows: Fig. 1 a first embodiment of a surveying rod with a distance measuring device, Fig. 2 an alternative design of the surveying rod and Fig. 3 another alternative design of the surveying rod.

[0040] Fig. Figure 1 shows a surveying rod, which is designated as a whole with the reference numeral 10. The surveying rod 10 comprises a rod body 12 and a rod tip 14. The rod tip 14 is detachably connected to the rod body 12 via a screw connection 16. The rod body 12 is hollow, i.e., it has a cylindrical shape with a lateral surface and an axially extending cavity enclosed therein. The surveying rod 10 further comprises a first end of the rod body 12 (not shown), onto which a receiver, in particular a GNSS receiver, also referred to as a "rover," can be mounted. A second rod end 18 is also provided, which points towards the rod tip 14.

[0041] The rod tip 14 is also formed, at least partially, cylindrically around an axially extending cavity, which also extends through the screw connection 16. At the end of the rod tip 14 facing away from the rod body 12, i.e., at the other free end 24, it tapers conically to form the actual point for placement on an object to be measured. The rod tip 14 has a distance measuring device 20 that emits two laser beams 22, namely a distance measuring laser beam 22a and a pointing laser beam 22b, which differ in wavelength, in the direction of the free end of the rod tip 14, which is marked with the reference numeral 24 and can be placed on or directed at an element to be measured.

[0042] In particular, the distance-measuring laser beam 22a can be emitted in a wavelength range that lies in the red visible and / or infrared spectrum, whereas the aiming laser beam 22b can be emitted in the green visible wavelength spectrum. The aiming laser beam 22b offers the advantage that green radiation is more easily detected by the human eye, thus significantly facilitating the positioning of the distance-measuring laser beam 22a and thereby positively influencing the measurement accuracy. The two laser beams 22 are preferably emitted parallel to each other along the axis of the rod body 12 and are both directed at the same target to be measured or strike the target directly adjacent to each other.

[0043] The rod tip 14 has a configuration at its free end 24, which faces away from the rod body 12, in which three individual tips 26 are provided, arranged equidistantly around the circumference of the rod tip 14, and have an opening 28 between them through which the beam 22 exits. The configuration with two, and especially three, individual tips 26 allows, on the one hand, placement on a relatively small element to be measured, such as a pipeline. On the other hand, particularly if the individual tips 26 are conical or frustoconical, i.e., have a circular, tapering cross-section towards the free end 24, the risk of dirt or soil obstructing the opening 28 is reduced.By providing individual points 26 and thereby a downwardly widening opening 28 between the individual points 26, the accumulation of contaminant material in the opening 28 is reduced compared to a cylindrical opening that is enclosed on all sides by cylindrical walls.

[0044] The distance measuring device 20, which is arranged in the rod tip 14, has the advantage that retrofitting is easier or, in the event of damage or failure, the rod tip 14 can be replaced.

[0045] If the distance measuring device 20 is located in the area of ​​the rod tip 14, information about the length of the surveying rod 10 towards the first end (not shown) of the rod body 12 is required in order to determine the height of a mounted rover (also not shown) above the element to be measured. Additionally, tilt detection can be provided so that a correction is made if the surveying rod 10 is mounted at an angle.

[0046] Fig. Figure 2 now shows an alternative design, where identical elements are labelled with the same reference symbols. This is shown here (in Fig. 2) also the first end 13 of the rod body 12, as well as the second end 18. The rod body 12 is cylindrical with a central cavity and connected to a similarly hollow rod tip 14. The design with three individual tips 26 at the free end 24 corresponds to that in Fig. 1 shown.

[0047] The rod tip 14 can be designed according to Fig. 2 fixed, possibly also in one piece, or also detachable as in Fig. 1 be connected to the rod body 12.

[0048] In contrast to the embodiment in Fig. The distance measuring device 20 is arranged here in the region of the first end 13 of the rod body 12. It can also be provided that the distance measuring device 20 is detachably connected to the rod body 12. Alternatively, it can also be permanently arranged in the rod body 12.

[0049] The two laser beams 22 emitted by the distance measuring device 20 are guided through the entire measuring rod 10, with the cavities of the rod body 12 and the rod tip 14 running along the rod axis being aligned with each other. The design according to Fig. The distance measuring device 20 also allows the rod length to be determined simultaneously. The laser beams 22 run along the axis of the surveying rod 10, so that when the rod tip 14 with its individual tips 26 is placed on the surface, there are no deviations between the measured distance and the actual distance. It is also possible to take measurements without placing the rod tip 14 on the element to be measured, in which case the laser beams 22 still strike the element. Even in these cases, measuring the height of a receiver (not shown) located at the end of the surveying rod opposite the rod tip is easily possible.

[0050] Even with this design, tilt detection can be provided in the receiver.

[0051] Fig.Figure 3 shows a design in which the surveying rod 10 has a rod body 12, the upper, first end 13 of which is shown, and a rod tip 14, the lower end of which is shown. The rod tip 14 is designed as a simple rod tip with a single point 26. The rod body 12 can be either hollow or made of solid material.

[0052] A distance measuring device 20 is detachably attached to the rod body 12, particularly in the region of the first end 13 of the rod body 12. The connecting means for attaching the distance measuring device 20 to the rod body 12 is not shown. The distance measuring device is arranged in a housing 21. In particular, a clamping or snap-fit ​​connection between the distance measuring device 20 and the surveying rod 10 is possible. For example, a connecting means can be provided that is placed around the rod body 12 and frictionally secures the distance measuring device 20 there.

[0053] The distance measuring device 20 emits two laser beams 22 as described above, namely a distance measuring laser beam 22a and a peening laser beam 22b, which run parallel to each other and are emitted in particular parallel to the axis of the rod body 12.

[0054] Such a design allows the distance measuring device 20 to be separated from the rod body 12 if the distance measuring device 20 is not needed.

[0055] In particular, the distance measuring device 20 can therefore also be used for other purposes and, for example, coupled with a work tool such as an excavator and thus serve to measure the distance of a tool. It is particularly preferred if the distance measuring device 20, including its housing 21, occupies only a small installation space in order to achieve easy transportability and not to unnecessarily weigh down and unbalance the measuring rod 10.

[0056] This design also provides the possibility of retrofitting existing surveying rods 10. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 182 066 A1

[0008]

Claims

[1] Surveying rod (10) comprising a rod body (12), in particular with a receptacle for a receiver, in particular a GNSS receiver, with a first end (13) of the rod body (12) and a rod tip (14) at a second end (18) of the rod body (12) and a distance measuring device (20) connected to the surveying rod (10), wherein the distance measuring device (20) emits a distance measuring laser beam (22a) directed from the distance measuring device (20) towards a target to be surveyed, characterized by , that the distance measuring device (20) additionally emits a pegged laser beam (22b) which is also directed towards the target to be measured and / or towards an area immediately adjacent thereto, wherein the pegged laser beam (22b) emits in a different wavelength range than the distance measuring laser beam (22a). [2] Surveying rod according to claim 1, characterized by, that the distance measuring laser beam (22c) is emitted in the visible, red and / or infrared wavelength range. [3] Surveying rod according to claim 1 or 2, characterized by , that the pilla laser beam (22b) is emitted in the visible green wavelength range. [4] Surveying rod according to any of the preceding claims, characterized by , that the two beams (22), distance measuring laser beam (22a) and aiming laser beam (22b), run parallel to each other or intersect in the target to be measured or approach each other in the target to be measured or both are emitted intermittently or at different times in the same axis. [5] Surveying rod according to any of the preceding claims, characterized by , that the distance measuring device (20) is detachably connected to the surveying rod (10), in particular via a positive locking and / or force locking connecting means. [6] Surveying rod according to any one of the preceding claims 1 to 4, characterized by , that the distance measuring device (20) is firmly connected to the surveying rod (10). [7] Surveying rod according to any of the preceding claims, characterized by , that the distance measuring device (20) is arranged in a housing (21) and can be fixed to the measuring rod (10) by means of the housing (21). [8] Surveying rod according to any of the preceding claims, characterized by , that the rod body (12) of the surveying rod has a longitudinally extending cavity which is closed in the circumferential direction of the rod body (12) and preferably extends over the entire length of the rod body (12) and wherein an opening is provided in the area of ​​the rod tip (14), and in particular the rod tip (14) is open at its end facing away from the rod body (12), wherein the distance measuring device (20) is arranged in the surveying rod (10). [9] Surveying rod according to any of the preceding claims, characterized by , that the tip (14) of the surveying rod (10) and the rod body are detachably or permanently connected to each other. [10] Surveying rod according to any of the preceding claims, characterized by , that the rod tip (14) is provided at its end facing away from the rod body (12) with at least two, preferably three, individual tips (26) distributed around the circumference of the rod tip (14) and tapering towards the free end in the longitudinal direction, wherein in particular the central opening is arranged centrally between the individual tips. [11] Surveying rod according to one or more claims comprising an inclined measuring device.

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