WO2007009754A1

WO2007009754A1 - Extension body with alignable target marker for referencing an inaccessible measurement point

Info

Publication number: WO2007009754A1
Application number: PCT/EP2006/007064
Authority: WO
Inventors: Dietmar Heimer; David Nabs
Original assignee: Metronom Ag
Priority date: 2005-07-18
Filing date: 2006-07-18
Publication date: 2007-01-25

Abstract

The invention relates to a precision measurement body for determining the physical position of at least one hidden point in a large component through precise optical gauging of the physical position of at least one measurement point, the relative position of the at least one measurement point and of the at least one hidden point being precisely predetermined relative to one another, comprising: a support element; at least one receptacle, in which each receptacle is connected to the support element and each receptacle is designed to hold at least one fitting element, with the at least one fitting element defining the at least one measurement point; a coupling element which is arranged on the support element and which can be coupled to a holding element mounted on the large component; and in which at least one of the receptacles comprises an alignment device which is designed such that the position of the at least one fitting element to be held can be pre-aligned relative to the support element such that when the coupling element has been coupled to the holding element the at least one measurement point and the at least one hidden point are in the predetermined relative position with respect to one another.

Description

ANCHORING BODY WITH ADJUSTABLE TARGET MARKET FOR REFERENCING AN INACCESSIBLE MEASUREMENT POINT

Field of the invention

The invention relates to a precision measuring body for determining the spatial position of at least one hidden point of a large component.

State of the art

In surveying technology, a so-called laser tracker or a laser radar is often used in the measurement of terrain topographies, in the measurement of buildings or in the assembly and / or measurement of large components such as in industrial plant, aircraft or shipbuilding. These are placed in a location with known coordinates and emit light beams, which are e.g. is reflected back to the laser tracker by a prism mirror attached to a point to be measured. The laser tracker measures two angles of the reflected light beam and, due to the transit time difference, the distance between the laser tracker and the measuring point. In this way, the spatial position of the measuring point can be determined relative to the laser tracker.

However, there is often the problem that a point whose coordinates are to be determined is not directly accessible to the light beam, but is obscured by an object. There are tools known that are used to measure such hidden points. For this purpose, for example, two prism mirrors are fixed at a known distance from each other and at a known distance to one end of a metal bar. The end of the metal rod may have a tip which is held at the hidden point. The distance of the prism mirror to the tip should be sufficiently large, so as to ensure the laser tracker clear view of the prism mirror. In such a measuring rod while the two prism mirror and the tip lie on a straight line, for example, the central axis of the rod. By measuring the two now accessible by the prism mirror defined measuring points and due to the fact that these two measuring points and the hidden point in known distances lie on a straight line, the coordinates of the hidden point can be determined. Another way to determine a hidden point is to measure only a point on a straight line through the hidden point with a predetermined distance from each other, if in addition the direction of the line is known.

From the optical measurement prism mirror are known, which consist of a cube corner of glass, the outer sides are mirrored and are inserted into a spherical housing. Such Anmesselemente be called retroreflectors. Other sensing elements are e.g. Optical measuring marks, which have a light-reflecting surface layer and are also used for photogrammetric measurement.

In the assembly and / or measurement of large components, it is often necessary to determine such hidden points repeatedly and over a longer period of time. For this purpose, it is necessary to suitably support the measuring rods or dipsticks on the large component. The accuracy of the determination of the position of the hidden point should be ensured over a sufficient period of time. The position of the hidden point can be defined, for example, by a holder for the measuring rod, which is fixedly arranged in or on the large component.

The requirements for the accuracy of the position of the measuring points is, for example, in aircraft better than 0.05 mm. Such accuracies in measuring rods with lengths of up to a few meters require on the one hand a precise calibratability or adjustability of the relative position of the measuring points and the hidden point to each other, and on the other hand concerning the stability of the connection of the measuring rod to the large component and also with regard to stability the measuring rod itself made high demands.

With the above-mentioned measuring rod of the prior art, manufacturing with such accuracy can not be accomplished, and precision calibration can not be performed either. Furthermore, it is disadvantageous that such a measuring rod usually has to be held by hand.

In view of the mentioned disadvantages of the measuring rod known from the prior art and the requirements in the assembly and / or measurement of large construction Share the invention is based on the object to provide a precision measuring body with which the coordinates of a hidden point in single and / or repetition measurements can be determined with great precision.

The aforementioned object is achieved by a precision measuring body for determining the spatial position of at least one hidden point of a large component by precise optical measurement of the spatial position of at least one measuring point, wherein the relative position of the at least one measuring point and the at least one hidden point to each other is precisely predetermined comprising: a support member; at least one receptacle, wherein each receptacle is connected to the carrier element and each receptacle is designed to receive at least one recording element, wherein the at least one measuring element defines the at least one measuring point; a coupling element arranged on the carrier element, which can be coupled to a holding element fastened to the large component; and wherein at least one of the receptacles comprises an adjusting device, which is designed such that the position of the at least one male Anmementsements with respect to the support member is pre-adjusted so that after the coupling of the coupling element to the holding element, the at least one measuring point and the at least one hidden Point in the predetermined relative position to each other.

Such a precision measuring body has the advantages described below. The carrier element provides a stable support structure for the other components of the precision measuring body. With the coupling element which is arranged on the precision measuring body, the precision measuring body can be coupled to a holding element. In this case, the relative position of the at least one measuring point and the at least one hidden point to each other is precisely predetermined. By connecting the coupling element with the holding element of the precision measuring body is held in a predetermined position, so that the at least one hidden point occupies the precalibrated relative position. In this case, the hidden point may be located, for example, spatially inside or outside of the holding element or the coupling element.

The at least one receptacle is connected to the rod element and designed such that each receptacle can receive and hold at least one measuring element. Each measuring element defines an example by a laser tracker measurable measuring point. The use of recordings for the Anmesselemente has the advantage over the direct attachment of the Anmesselemente on the rod element that the Anmesselemente easy to use and are easily removed, for example, for an exchange.

At least one receptacle comprises an adjusting device, which is designed such that the position of the at least one male Anmementsements with respect to the support member is pre-adjusted so that after the coupling of the coupling element to the holding element of the at least one measuring point and the at least one hidden point in the predetermined relative position to each other. The precise predetermined relative position of the at least one measuring point and the at least one hidden point to each other is achieved by a - except occasional control and recalibrations - unique calibration of the precision measuring body, which is performed before the actual measuring operations by means of a calibration device. The calibration can be carried out, for example, such that a test specimen is attached to the coupling element, which specifies the relative position of the hidden point to be determined in retrospect. The calibration can be carried out with optical measuring elements to be measured, but it is also possible, for example, to use targets (measuring elements) in the form of probing balls for coordinate measuring devices. By means of the adjusting device, in contrast to the measuring rods of the prior art, a precise adjustment and calibration of said relative position can be achieved.

To determine the spatial position of the at least one hidden point and the appropriate previous calibration, in addition to the defined by at least one Anmesselement at least one measurement point, for example, one or more fixed points (ie points of the large component that do not change their spatial position, such as points on the axis of rotation during rotations) are used. Furthermore, it is possible to attach one or more measurement points on the large component to positions that can be detected by the laser tracker. Furthermore, an angular position of a plane which contains the hidden point and the at least one measuring point can also be predetermined. In addition to the at least one measuring point to be measured, two further measuring points on the large component are required for the absolute determination of the spatial position of the at least one hidden point, for example, if this does not contain any fixed points. In the case of a fixed point of the large component another measuring point is needed on the large component. If a predetermined angular position of a plane containing a hidden point and the at least one measuring point of the precision measuring body exists, then only one further measurable measuring point on the large component or one fixed point of the large component is sufficient to determine the spatial position. Yet another possibility is that the at least one measuring point and the at least one hidden point lie on a straight line with a predetermined direction and at a predetermined distance from one another, wherein then by means of the adjusting device, a calibration of this direction and the distance can take place.

A refinement of the precision measuring body according to the invention consists in a precision measuring body for determining the spatial position of the at least one hidden point of the large component by precise optical measurement of the spatial position of at least two measuring points whereby the relative position of the at least two measuring points and the at least one hidden point to each other thereby precisely predetermined is that the at least two measuring points and the at least one hidden point lie on a straight line and at predetermined distances from each other; wherein: a total of at least two receptacles are provided, wherein each receptacle is connected to the carrier element and each receptacle is adapted to receive at least one Anmesselements, each Anmesselement defines one of the at least two measuring points; and after the coupling of the coupling element to the retaining element, the at least two measuring points and the at least one hidden point lie precisely on the straight line and at precisely known distances from each other.

In this development, it is sufficient to measure the at least two measuring points of the precision measuring body in order to determine the spatial position of the at least one hidden point, since the at least two measuring points and the at least one hidden point lie on a straight line and at known distances from one another. The calibration is performed in this case by a fine adjustment of the relative position of the at least one hidden point and the at least two measuring points by means of the adjusting device so that after the coupling of the coupling element to the holding element, the at least two measuring points and the at least one hidden point precisely on the Straight lines and at precisely known distances from each other. Another refinement of the precision measuring body according to the invention consists in a precision measuring body for determining the spatial position of the at least one hidden point of a large component by precise optical measurement of the spatial position of at least one measuring point, whereby the relative position of the at least one measuring point and the at least one hidden point to each other it is precisely predetermined that the at least one measuring point and the at least one hidden point lie on a straight line having a predetermined direction, preferably a vertical direction, wherein: the at least one sensing element defines the at least one measuring point; and after the coupling of the coupling element to the retaining element, the at least one measuring point and the at least one hidden point lie precisely on the straight line with the predetermined direction, preferably the vertical direction, and at a precisely known distance from each other.

This development of the precision measuring body has the advantages described below. By the connection of the coupling element with the holding element of the precision measuring body is held in a predetermined spatial direction. Preferably, this precision measuring body is held by the coupling between the coupling element and the holding element in vertical alignment at the upper end. By providing the precision measuring body with e.g. is allowed to dislocate gravitationally, while the exact vertical direction of the said line is taken. In this case, only the measurement of at least one measuring point is necessary in order to determine the spatial position of the at least one hidden point.

Another development of the precision measuring body according to the invention consists in a precision measuring body for determining the spatial position of the at least one hidden point of a large component by precise optical measurement of the spatial position of at least three measuring points, the relative position of the at least three measuring points and the at least one hidden point to each other precisely predetermined, wherein: at least three receptacles are provided, wherein each receptacle is connected to the support member and each receptacle is adapted to receive at least one Anmesselements, each Anmesselement defines one of the at least three measuring points; and after the coupling of the coupling element to the holding element, the at least three measuring points and the at least one hidden point in the predetermined relative position to each other. In this refinement of the precision measuring body according to the invention, at least three measuring elements can be arranged thereon, whereby at least three measuring points are available. By measuring the at least three measuring points, the at least one hidden point can be determined on the basis of the predetermined relative position.

Another development of the precision measuring body according to the invention and its developments is that the relative position of the at least one hidden point and the at least one measuring point, the at least two measuring points or the at least three measuring points to each other by or precisely is precisely predetermined that the precise spatial Position of at least one fixed point of the large component is predetermined and / or that at least one Anmessbarer point of the large component is precisely measured and / or a spatial direction in which at least two of said points are aligned, predetermined and / or a plane which at least three of specified points is predetermined.

As a result, known spatial relationships are introduced as constraints in the determination of the at least one hidden point and thereby allow its determination with as few points to be measured or improve the accuracy of the determination.

Another refinement of the precision measuring body according to the invention and its developments consists in that the holding element can comprise and / or define the at least one hidden point, or in which the coupling element can comprise and / or define the at least one hidden point after being coupled to the holding element.

In this way, the precision measuring body is placed close to the at least one hidden point to be determined, which improves the accuracy of the determination.

Another refinement of the precision measuring body according to the invention and its developments is that each receptacle can comprise an adjusting device. In this way it is possible to adjust the position of all measurable measuring points of the precision measuring body.

Another development of the precision measuring body according to the invention and its developments is that the carrier element may comprise a rod element, wherein the Koppluπgselement may be disposed at one end of the rod member.

In this way, an easy-to-manufacture and little space-taking precision measuring body is provided.

Another development of the precision measuring body according to the invention, which comprises a rod element as a support member, and its developments is that the position of the at least two receptacles on the rod member is selected so that in the longitudinal direction of the rod member, the distance between the end of the precision measuring body on which the Coupling element is arranged, and the closer thereto recording is smaller than the distance between the closer receptacle and the remote recording, preferably in the ratio of 1: 2.

This has the advantage that, viewed along the rod element in the direction of the hidden point, the distance between the at least two measuring points is greater than the distance between the measuring point which is closer to the hidden point and the hidden point itself, and therefore in the determination the coordinates of the hidden point is extrapolated from the coordinates of the at least two measuring points to smaller dimensions, which improves the accuracy of this determination.

Another development of the precision measuring body according to the invention and its developments is that the coupling element comprises a sleeve, a cylinder, a ball, a flat surface or a polygon, wherein the polygon is preferably a triangular, a square or a hexagon, and / or wherein the coupling element has a shape which prevents, after the coupling to the holding element, a movement or a rotation of the carrier element with respect to the holding element. This development has the advantage that simple and expedient coupling elements are provided. In the case of a sleeve as a coupling element this is plugged for coupling to a correspondingly dimensioned pin of a retaining element. In the case of a cylinder on a rod element, its axis of symmetry can run, for example, parallel or perpendicular to the longitudinal direction of the rod element. For coupling to a holding element, this can be designed in the form of a cylindrical shell. In the case of a ball as a coupling element, this can be added for coupling, for example, in a suitably sized spherical shell. In this case, for example, a magnetic device can be used for non-positive holding. If the coupling element has a shape which, after being coupled to the holding element, prevents the rod element from rotating about its longitudinal axis, a hidden point arranged outside the rotation axis can be reliably measured without the straight line being rotated by the measuring elements with respect to the hidden point. In the case of a polygon as a coupling element with appropriately ausgestaltetem holding element thereby several positions of the precision measuring body and thus also other hidden points can be predetermined.

Another development of the aforementioned development is that the center of the ball can define the hidden point.

This has the advantage that a particularly excellent and easy to be measured in the calibration point point can be selected as a potential hidden point, and it is thus easily possible to arrange the hidden point, for example, on the geometric center axis of a round bar element. As a potential hidden point, the point is referred to relative to the precision measuring body, which is identical to the hidden point to be determined after coupling to the holding element.

Another development of the precision measuring body according to the invention and its developments is that the coupling element can be designed for positive coupling to the holding element.

This has the advantage that between the coupling element and the Halteelemeπt least possible or no gap is present, whereby the precision measuring body even with repeated uncoupling and coupling again assumes the same position, or that only the smallest possible deviation occurs.

Another development of the precision measuring body according to the invention and its developments is that the material of the coupling element steel, preferably V2A stainless steel, may comprise.

This has the advantage that, for example, even in the case of Präzisionsmesskörpem in the form of long rods or in the case of relatively heavy Präzisionsmesskörpern a sufficiently stable and reliably repeatable coupling of the coupling element can be done with the holding element, without causing a measurement accuracy influencing deformation of the coupling element.

Another development of the precision measuring body according to the invention and its developments is that each adjusting device can be designed such that the position of each male Anmesselements is three-dimensionally adjustable with respect to the support member, preferably in three mutually perpendicular directions, wherein in the case of a rod member as a support element Direction thereof is preferably the longitudinal direction of the rod member.

This has the advantage that the measuring point defined by each measuring element can be aligned three-dimensionally with respect to the carrier element, so that the measuring point can be adjusted both in a longitudinal direction and perpendicular thereto. Preferably, the adjusting device is designed such that, for example, the distance between two measuring points and / or the distance between a measuring point and the hidden point can be done only by adjustment in the longitudinal direction and the orientation in the plane perpendicular to the longitudinal direction of the rod member by the adjustment in the two other directions can be made to thereby the measuring points or the measuring point and the hidden point, for example to adjust lying on a straight line.

Another development of the precision measuring body according to the invention and its developments consists in that each adjusting device can be designed such that it can be adjusted with an accuracy of better than 0.1 mm, preferably better than 0.05 mm, most preferably better than 0.02 mm is. This has the advantage that with it an accuracy required for the manufacture and assembly and / or measurement of large components, for example in aircraft construction is achieved.

Another development of the precision measuring body according to the invention and its developments is that each adjustment comprising a central element and each adjusting device may comprise an actuating element, wherein the core element is fixedly connected to the carrier element and the position of the actuating element is adjustable with respect to the core element, and further wherein the actuator is adapted to receive at least one Anmesselement.

Because each recording comprising an adjusting device comprises the respective adjusting device, each receptacle thus comprises both the respective core element and the respective adjusting element. This has the advantage that each receptacle can be firmly connected to the carrier element by means of the core element and thereby provides a suitable specification for the geometric position of the male engaging element relative to the carrier element. A fine adjustment of the corresponding measuring points or the corresponding measuring point can be effected in a calibration by means of the adjusting element, which can accommodate at least one Anmesselement, for example in an opening of the actuating element, and by adjusting the adjusting element relative to the core element, the at least one Anmesselement in its position can be adjusted relative to the support element.

Another development of the aforementioned development is that each adjusting device may further comprise an adjusting device and / or a locking device, wherein the adjusting device is designed for adjusting the position of the actuating element with respect to the core element and the locking device for detecting the actuating element with respect to the core element is formed.

By the adjustment, for example in the form of one or more screws with fine thread and / or one or more eccentric screws; the actuator can be adjusted relative to the core element and thus relative to the carrier element. By the locking device, for example in the form of one or more locknuts and / or one or more clamping screws, the actuator in his calibrated position are detected, so that further undesired adjustment can be prevented.

Another development of the precision measuring body according to the invention and its developments is that each receptacle may comprise at least one magnetic device which is designed such that in each case at least one Anmesselement by magnetic forces on the recording is durable.

This has the advantage that the respective Anmesselement can be easily attached and removed, and that it can be safely held.

Another development of the precision measuring body according to the invention with a rod element as a carrier element and its developments is that the rod element can have a circular cross-section.

This development has the advantage that a simple and easy-to-manufacture rod element is provided.

Another development of the precision measuring body according to the invention with a rod element as a carrier element and its developments is that the rod element may comprise a tube.

This has the advantage that the rod element is light and stable.

Another development of the precision measuring body according to the invention and its developments is that the support element for each receptacle may have a recess in which the respective receptacle is arranged.

In this way, the measuring point can be lowered. For example, in the case of a rod element as a carrier element, this has the advantage that each receptacle can be displaced in a direction perpendicular to the longitudinal direction of the rod element towards the middle of the rod element, if a straight line containing the at least one measuring point and / or the concealed point is at least partly inside of the rod element runs. In the case of a pipe as a rod element, the measuring points or the measuring point can thereby be displaced in the direction of the axis of symmetry. Another development of the previously mentioned development consists in the case of a rod element as a carrier element in that each recess can be configured such that the at least one measuring element defined by the at least one measuring element is arranged in the geometric center of gravity of the cross-section of the rod element.

In the case of a rod element with a circular cross-section, for example a tube, a straight line containing the at least one measuring point can thus run exactly on the axis of symmetry of the rod element if the hidden point also lies on the axis of symmetry. This has the advantage that, for example, a precise production of the coupling element in the form of a sleeve can be done by a turning process. In the case of a ball as a coupling element, it can be easily arranged at one end thereof in the case of a pipe, so that the center of the ball lies on the axis of symmetry, ie also on the straight line.

Another development of the precision measuring body according to the invention and its developments is that each receptacle for receiving at least one retroreflector, an optical measuring mark, a light-reflecting ball, or another optically or tactually anmessbaren object can be designed as Anmesselement.

This ensures that common sensing elements can be used.

Another development of the precision measuring body according to the invention with a rod element as a carrier element and its developments is that along the rod element at least one reinforcing element can be arranged, preferably two reinforcing elements can be arranged to reinforce the support structure.

In this way, it is possible to reinforce the support structure with long bar elements, so that, for example, in an oblique to horizontal orientation of the precision measuring body, a measurement result falsifying bending of the rod element is prevented. Another development of the aforementioned development is that each reinforcing element may comprise a tube.

This has the advantage that each reinforcing element itself can be stable and light.

Another development of the two aforementioned developments is that the material of the reinforcing element aluminum and / or plastic and / or titanium and / or GRP material and / or CFRP material, wherein the fibers of the CFRP material preferably substantially unidirectional in a longitudinal direction of the support element, and / or may comprise another light and stable material.

This has the advantage that the reinforcing element can be particularly light and yet stable. With fiberglass material is referred to here glass-fiber-plastic.

Another development of the precision measuring body according to the invention and its developments is that the material of the support element aluminum and / or plastic and / or titanium and / or GRP material and / or CFRP material, wherein the fibers of the CFRP material preferably substantially unidirectional extend in a longitudinal direction of the support member, and / or may comprise another light and stable material.

In this way, the carrier element can be very easily and in the case of CFRP material (carbon fiber-plastic) very light, very stable and extremely insensitive to temperature fluctuations are formed. In the case of CFRP material with unidirectional fibers, insensitivity to atmospheric moisture is also ensured. In contrast, for example, cross-wound CFRP rods or CFRP pipes show an expansion through moisture absorption over longer periods of time.

Further preferred embodiments of the invention will be described below with reference to the drawings. Brief description of the drawings

1a shows a schematic representation of the problem in the determination of a hidden point and a first embodiment of the precision measuring body according to the invention.

Fig. 1b shows a schematic representation of the determination of a hidden

Punktts and a first embodiment of the precision measuring body according to the invention.

Fig. 2 shows a schematic representation of the determination of a hidden

Point in another way and a second embodiment of the precision measuring body according to the invention.

Fig. 3 shows a third embodiment of the precision measuring body according to the invention.

4 shows a fourth embodiment of the precision measuring body according to the invention.

Fig. 5 shows a fifth embodiment of the precision measuring body according to the invention.

6 shows a sixth embodiment of the precision measuring body according to the invention.

Fig. 7 shows a seventh embodiment of the precision measuring body according to the invention.

Description of the embodiments

Fig. 1 illustrates the problems encountered in the assembly and / or measurement of large components 190 problem. A laser tracker L stands at a fixed defined position tion. The spatial position of the point P should be determined. However, this is not directly accessible as shown here for the laser beam because it is hidden by the large component 190 itself. However, the coordinates of the hidden point P can be offset by a predetermined amount by means of the precision measuring body 100 according to the invention.

The precision measuring body 100 has a rod element 110 as a carrying structure. At the right end of the rod member 110, a coupling element 140 is arranged, which can be positively coupled to the holding member 180, wherein the holding member 180 is fixed to the large component 190 and in this case includes the hidden point P to be determined. The exact location of the hidden point P relative to the holding member 180 is known. On the rod element 110, two receptacles 120 for each an Anmesselement 170 are arranged, which define the measuring points M1 and M2. The Anmesselemente 170 are adjustable in their relative position with respect to the rod member 110 by a respective adjusting device 130.

Before the actual use for the determination of the hidden point P, the precision measuring body is precisely adjusted by means of a calibration device and using the adjusting device so that after coupling to the holding element 180, the measuring points M1, M2 and the hidden point lie exactly on a straight line and the Distances between the points M1, M2 and P are known exactly.

In Fig. 1 b, the same situation as in Fig. 1a is shown, but the precision measuring body 100 is coupled via the coupling element 140 with the holding member 180 and thus also to the large component 190. With the aid of the laser tracker L, the coordinates can now be measured by the measuring points M1 and M2, and because the points M1, M2 and P lie exactly on a straight line G, the coordinates of the hidden point P can also be determined using the known point distances.

FIG. 2 shows another possibility for determining a hidden point P and a second embodiment of the precision measuring body according to the invention. Like reference numerals as in FIGS. 1a, 1b denote the same components here, whereby only the number of hundreds in FIG. 2 has been changed, and in order to avoid weighing Here, in the description of the drawing, only the differences are referred to.

In this case, the hidden point P is located on a ceiling of a large component 290. In determining the point P, use is here made of its position also by a straight line G of known direction through the hidden point P and a measured point M. the straight line, which has a known distance to P, is fixed. In this example, a precision measuring body 200 is used, which only comprises a receptacle for an Anmesselement 270. The coupling element 240 here comprises a ball, e.g. is arranged via a magnetic device in the coupling element 240 and / or in the holding element 280. The holding element 280 here comprises a spherical shell which is form-fitting with the ball 240.

The arrangement is chosen such that the center of the ball 240 after coupling represents the hidden point. The receptacle 220 comprises an adjusting device 230 with which the position of the point M relative to the rod element 210 can be precisely adjusted so that the measuring point M and the hidden point P lie at a known distance on a straight line G with a known direction. In this case, the precision measuring body 200 is designed such that the straight line G runs exactly perpendicular when the precision measuring body 200 oscillates gravitationally.

In Fig. 3, a third embodiment of the precision measuring body according to the invention is shown. Similar reference characters as in the previous figures denote like components, in which case only the hundreds number in FIG. 3 has been changed, and in order to avoid repetition, only the differences are referred to in the description of the drawing.

The precision measuring body 300 shown here comprises a tube 310 as a rod element, which is made of CFRP material. At the right end of the rod member in the tube a precisely rotated sleeve 340 is attached as a coupling element, for example by gluing. Recesses 350 are milled into the CFRP pipe 310 so that a receptacle 320 can be arranged in the pipe in each of these recesses 350. Each receptacle 320 in this case comprises core element 321, which is fixedly arranged inside the tube 310, an adjusting device 330 and a magnet assembly. direction 322. Each magnetic device is used for the frictional holding a Anmesselements that is applied to the receptacle 320. Each of the adjusting devices 330 here comprises an adjusting element 331, for example in the form of a metal tongue with a circular cut-out for receiving an engaging element, wherein the adjusting element 331 relative to the core element 321 is adjustable by adjusting screws 332, and can be determined by means of locking screws 333.

The location of the measurement points defined by the male sensing elements is adjusted to lie on the center axis of the rotated sleeve 340. This has the advantage that then also the hidden point must lie on this axis, which allows a precise definition of the hidden point in the corresponding holding element.

4, a fourth embodiment of the precision measuring body according to the invention is shown. Similar reference characters as in the previous figures denote like components, and here only the hundreds of numbers in Figure 4 have been changed, and to avoid repetition, only the differences will be referred to in the description of the drawing. With regard to the recess 450, which is shown here in plan view, reference is made to the corresponding explanations to FIG.

Here, only one receptacle 420 is present and the coupling element 440, 441 comprises a ball 440. Further, in this embodiment, the coupling element 440, 441 may include a temperature compensating head 441 to compensate for changes in length of the ball 440. The measuring point M of the engaging element and the center P of the ball 440 lie on the straight line G, which preferably coincides with the central axis of the rod element. With regard to the adjusting device 430 reference is made to the embodiments set out above.

FIG. 5 shows a fifth embodiment of the precision measuring body according to the invention. Similar reference characters as in the previous figures denote like components, and here only the hundreds number in Figure 5 has been changed, and to avoid repetition, only the differences will be referred to in the description of the drawing. The difference from the precision measuring body shown in FIG. 3 here is that the representation is in plan view, and that four recesses 550, 551 are provided in the rod element 510, wherein the recess 551 is larger than the recesses 550 and two receptacles are arranged therein.

Furthermore, in this example, the receptacle 521 is adapted for receiving two Anmesselementen. In this way, different combinations of distances between the measuring points and the hidden point in a precision measuring body can be realized. With regard to the adjusting devices 530, reference is made to the statements set out above.

FIG. 6 shows a sixth embodiment of the precision measuring body according to the invention. Similar reference characters as in the previous figures denote like components herein, with only the hundreds being changed in Figure 6, and to avoid repetition, only the differences will be referred to in the description of the drawing.

In contrast to the previous embodiments, the carrier element here does not consist of a rod element but of an elongated cuboidal plate 610. The coupling element here comprises an elongated parallelepiped rod 640, which is e.g. is glued or screwed to the support member 610 and positively fits into the support member 680. Furthermore, in this embodiment, only a receptacle 620 for an Anmesselement 670 is present, which defines a measuring point M.

The hidden point P to be determined in this case is defined, for example, by the position of the measuring point M and two fixed points F1, F2. The fixed points F1, F2 can be predetermined by the fact that the edge of the large component 690, which contains these two points F1, F2, represents a rotational axis which is spatially fixed during assembly. By predetermining the relative position of M, F1, F2 and P, the spatial position of the hidden point P can thus be determined by measuring the measuring point M.

Another possibility for the determination of the hidden point P is that, for example, only the point F1 is a fixed point (pivot point) and an attachable point A is provided on the large component 690. In this way, the Measure the spatial position of the points M and A ₁ and by the awareness of the fixed point F1 defines the position of the hidden point, which can thus be determined.

In Fig. 7, a seventh embodiment of the precision measuring body according to the invention is shown. Similar reference characters as in the previous figures denote like components, and here only the hundreds number in Fig. 7 has been changed, and to avoid repetition, only the differences will be referred to in the description of the drawing.

In contrast to the embodiment according to FIG. 6, three receptacles 720 are here arranged on the carrier element 710, which define the three measuring points N1, N2, N3 by means of the receivable engaging elements 770. In this example, an adjusting device 730 is provided only for one recording. The relative position of the measuring points N1, N2, N3 to the two hidden points Q1, Q2 is predetermined by calibration and adjustment by means of the adjusting device 730. By measuring the spatial position of the measuring points N1, N2, N3, the two hidden points Q1, Q2 can be detected e.g. be determined over the predetermined distance relationships.

Claims

CLAIMS:

1. Precision measuring body (100, 200, 300, 400, 500, 600, 700) for determining the spatial position of at least one hidden point (P, Q1, Q2) of a large component (190, 290, 690, 790) by precise optical measurement of the large component spatial position of at least one measuring point (M; M1, M2; N1, N2, N3), the relative position of the at least one measuring point (M; M1, M2; N1, N2, N3) and the at least one hidden point (P; Q1, Q2) is precisely predetermined to one another, comprising:

a support member (110; 210; 310; 410; 510; 610; 710);

at least one receptacle (120; 220; 320; 420; 520; 521; 620; 720), wherein each receptacle (120; 220; 320; 420; 520, 521; 620; 720) is connected to the carrier element (110; 210; 310 410; 510; 610; 710) and each receptacle (120; 220; 320; 420; 520; 521; 620; 720) is configured to receive at least one engagement element (170; 270; 470; 670; 770); wherein the at least one sensing element (170; 270; 470; 670; 770) defines the at least one measuring point (M; M1, M2; N1, N2, N3);

a coupling member (140; 240; 340; 440; 540; 640; 740) disposed on the support member (110; 210; 310; 410; 510; 610; 710) and connected to one of the large component (190; 290; 680; 780) ) fixed retaining element (180; 280; 680; 780) can be coupled; and

wherein at least one of the receptacles (120; 320; 520,521; 620; 720) comprises an adjusting device (130; 230; 330; 430; 530; 630; 730) which is designed such that the position of the at least one gripping element to be received (170; 270; 470; 670; 770) being pre-adjustable with respect to the support member (110; 210; 310; 410; 510; 610; 710) so that after coupling the coupling member (140; 240; 340; 440; 540; 640; 740) to the holding element (180; 280; 680; 780) the at least one measuring point (M; M1, M2; N1, N2, N3) and the at least one hidden point (P; Q1, Q2) in the predetermined relative position to each other.

2. precision measuring body (100; 300; 500) according to claim 1 for determining the spatial position of the at least one hidden point (P; Q1, Q2) of the large component (190) by precise optical measurement of the spatial position of at least two measuring points (M1, M2), the relative position of the at least two measuring points (M1, M2) and the at least one hidden point (P; Q1, Q2) to each other thereby precisely predetermined in that the at least two measuring points (M1, M2) and the at least one hidden point (P; Q1, Q2) lie on a straight line (G) and at predetermined distances from one another; wherein:

at least two receptacles (120; 320; 520,521) are provided, wherein each receptacle (120; 320; 520, 521) is connected to the carrier element (110; 310; 510) and each receptacle (120; 320; 521) for receiving at least one engaging element (170; 270; 470), each sensing element (170; 270; 470) defining one of the at least two measuring points (M 1, M2); and

after coupling the coupling element (140; 340; 540) to the support element (180), the at least two measuring points (M1, M2) and the at least one concealed point (P; Q1, Q2) precisely on the straight line (G) and in precise known distances from each other.

3. Precision measuring body (200; 400) according to claim 1 for determining the spatial position of the at least one hidden point (P; Q1, Q2) of a large component (290) by precise optical measurement of the spatial position of at least one measuring point (M), wherein the relative position of the at least one measuring point (M) and the at least one hidden point (P; Q1, Q2) to each other is precisely predetermined by the at least one measuring point (M) and the at least one hidden point (P; Q1, Q2) a straight line (G) having a predetermined direction, preferably a vertical direction, wherein:

the at least one sensing element (270; 470) defines the at least one measuring point (M); and

after the coupling of the coupling element (140; 340; 540) to the holding element (180), the at least one measuring point (M) and the at least one hidden point (P; Q1, Q2) precisely on the straight line (G) with the predetermined direction, preferably the vertical direction, and are at a precisely known distance from each other.

4. Precision measuring body (700) according to claim 1 for determining the spatial position of the at least one hidden point (P; Q1, Q2) of a large component (190; 290) by precise optical measurement of the spatial position of at least three measuring points (N1, N2, N3 ), wherein the relative position of the at least three measuring points (N1, N2, N3) and the at least one hidden point (P; Q1, Q2) relative to each other is precisely predetermined, wherein:

at least three receptacles (720) are provided, wherein each receptacle (720) is connected to the support member (710) and each receptacle (720) is adapted to receive at least one engagement member (770), each sensing member (770) being one of at least three Measuring points (M1, M2, M3) defined; and

after the coupling of the coupling element (740) to the holding element (780), the at least three measuring points (M1, M2; M3) and the at least one hidden point (P; Q1, Q2) are in the predetermined relative position to each other.

5. Precision measuring body (100; 200; 300; 400; 500; 600; 700) according to one of the preceding claims, wherein the relative position of the at least one hidden point (P; Q1, Q2) and the at least one measuring point (M) at least two measuring points (M1, M2) or the at least three measuring points (N 1, N2, N3) to each other or additionally precisely predetermined that the precise spatial position of at least one fixed point (F1, F2) of the large component (190; 290; 690; 790) is predetermined and / or that at least one measurable point (A) of the large component is precisely measured and / or a spatial direction in which at least two of said points (M; M1, M2; N1, N2, N3; P; Q1, Q2; F1, F2; A) are predetermined and / or a plane containing at least three of said points (M; M1, M2; N1, N2, N3; P; Q1, Q2; F1); F2; A) is predetermined.

6. Precision measuring body according to one of the preceding claims, wherein the holding element comprises the at least one hidden point and / or defined, or wherein the coupling element after the coupling to the holding element comprises and / or defines the at least one hidden point.

7. Precision measuring body according to one of the preceding claims, wherein each receptacle comprises an adjusting device.

8. Precision measuring body according to one of the preceding claims, wherein the carrier element comprises a rod member and the coupling element is arranged at one end of the rod member.

9. precision measuring body according to claim 8 in combination with claim 2 or in combination with one of claims 5 to 7 and claim 2, wherein the position of the at least two receptacles on the rod member is selected so that in the longitudinal direction of the rod member, the distance between the end of the Precision measuring body, on which the coupling element is arranged, and the closer thereto recording is smaller than the distance between the closer receptacle and the remote recording, preferably in the ratio of 1: 2.

10. Precision measuring body according to one of the preceding claims, wherein the coupling element comprises a sleeve, a cylinder, a ball, a flat surface or a polygonal, wherein the polygon is preferably a triangular, a square or a hexagon, and / or wherein the coupling element is a Having shape, which prevents a coupling or rotation of the support member with respect to the holding element after the coupling to the holding element.

11. Precision measuring body according to claim 10, wherein the center of the ball defines the hidden point.

12. Precision measuring body according to one of the preceding claims, wherein the coupling element is designed for positive coupling to the holding element.

13. Precision measuring body according to one of the preceding claims, wherein the material of the coupling element comprises steel, preferably V2A stainless steel.

14. precision measuring body according to any one of the preceding claims, wherein each adjusting device is formed such that the position of each male Anmementsements with respect to the support member is three-dimensionally adjustable, preferably in three mutually perpendicular directions, wherein in combination with claim 8, a direction thereof the longitudinal direction of the Rod elements is.

15. Precision measuring body according to one of the preceding claims, wherein each adjusting device is designed such that it is adjustable with an accuracy of better than 0.1 mm, preferably better than 0.05 mm, most preferably better than 0.02 mm.

16. Precision measuring body according to one of the preceding claims, wherein each comprising an adjusting device receiving a core element and each adjusting device comprises an actuating element, wherein the core element is fixedly connected to the carrier element and the position of the actuating element with respect to the core element is adjustable, and wherein further Adjusting element is designed for receiving at least one Anmesselement.

17. Precision measuring body according to claim 10, wherein each adjusting device further comprises an adjusting device and / or a locking device, wherein the adjusting device is designed for adjusting the position of the actuating element with respect to the core element and the locking device is designed for locking the actuating element with respect to the core element ,

18. Precision measuring body according to one of the preceding claims, wherein each receptacle comprises at least one magnetic device which is designed such that in each case at least one Anmesselement by magnetic forces on the recording is durable.

19. Precision measuring body according to one of the preceding claims in combination with claim 8, wherein the rod element has a circular cross-section.

20. Precision measuring body according to one of the preceding claims in combination with claim 8, wherein the rod element comprises a tube.

21. Precision measuring body according to one of the preceding claims, wherein the support member for each receptacle has a recess in which the respective receptacle is arranged.

22. precision measuring body according to claim 21 in combination with claim 8, wherein each recess is designed such that by the at least one aufzus- taking measuring element defined at least one measuring point in the geometric center of gravity of the cross section of the rod element is arranged.

23. Precision measuring body according to one of the preceding claims, wherein each receptacle for receiving at least one retroreflector, an optical measuring mark, a light-reflecting ball, a light-reflecting cube, a light-reflecting cuboid, another simple geometric body or any other optically or tactile anmessbaren object formed as Anmesselement is.

24. Precision measuring body according to one of the preceding claims in combination with claim 8, wherein along the rod element at least one reinforcing element is arranged, preferably two reinforcing elements are arranged to reinforce the support structure of the rod member.

25. Precision measuring body according to claim 24, wherein each reinforcing element comprises a tube.

26. Precision measuring body according to claim 24 or 25, wherein the material of the reinforcing element aluminum and / or plastic and / or titanium and / or GRP material and / or CFRP material, wherein the fibers of the CFRP material preferably substantially unidirectional in a longitudinal direction of the carrier element, and / or comprises another light and stable material.

27. Precision measuring body according to one of the preceding claims, wherein the material of the carrier element aluminum and / or plastic and / or titanium and / or GRP material and / or CFRP material, wherein the fibers of the CFRP material preferably substantially unidirectional in a longitudinal direction of the carrier element, and / or comprises another light and stable material.

28. Precision measuring body according to one of the preceding claims, wherein the coupling element comprises a compensation element for compensating thermal changes in length.