DE102010010296A1 - System for setting photogrammetric measuring instrument, has counter structure releasably, angle and position-stably connected with interconnect structure at sensor housing of one of optoelectronic sensors and arranged at stand - Google Patents

Abstract

The system has two optoelectronic sensors (2) arranged in a sensor housing (3) that is provided with an identical interconnect structure. A counter structure is releasably, angle and position-stably connected with the interconnect structure at the sensor housing of one of the optoelectronic sensors and arranged at a stand (1). Cross beams (4) are horizontally and releasably connected to the stand. An evaluation unit is wirelessly connected with the sensors for controlling measurement and evaluating recordings of the sensors for coordinate determination of measuring points.

Description

The invention relates to a system for constructing photogrammetric measuring arrangements.

The method of photogrammetric measurement of three-dimensional objects is known and widely used in practice. So this method is z. B. used in the automotive industry to determine the position of reference points in complex-shaped components with respect to a component-own coordinate system in prototype or to monitor the accuracy of fit of the corresponding components in the quality control.

In the photogrammetric measuring methods, there are different structures, which are selected depending on the requirements of the measurement process. The structures in common is that in each case at least one recording device, usually an optoelectronic sensor, placed in order to image in his recording field to be measured object. In many cases, however, two or even more optical recording devices are required, which make corresponding recordings of the object to be measured under different solid angles. Again, there are different approaches, which often when using multiple recording devices they are placed individually on tripods and distributed in a measuring room.

Currently, different measuring systems are offered on the market for the different measuring methods, but they are not compatible with each other.

This means that for laboratories that handle different equipment with different measuring systems, a corresponding variety of such system must be kept in stock. In addition to an increased cost of storage and retooling, this means in particular a relatively high capital commitment, since the individual systems are equipped with expensive components and therefore are expensive.

Here is to be remedied with the invention and a simple, flexible and versatile in different measurement setups usable system for the construction of photogrammetric measuring arrangements can be specified.

This object is achieved by a system having the features of claim 1. Advantageous developments of such a system are specified in the dependent claims 2 to 9.

According to the invention, a system for constructing photogrammetric measuring arrangements, which has the required properties of a simplification and improved possibility of combination, comprises at least two optoelectronic sensors and at least one stand. The optoelectronic sensors are arranged in sensor housings, in which the special feature is that they are each provided with an identical connection structure. That at least one tripod has a counter-structure, which can be connected to the connection structure optionally one of the sensor housing angularly and positionally stable releasably.

This embodiment brings with it a simplification in two respects:
First of all, the formation of the structure and counterstructure for detachable and angularly stable or positionally stable connection of one of the optoelectronic sensors with the stand causes a connection to be established quickly and with simple manipulations, which is then formed angularly and positionally stable. A corresponding structure and counter-structure can, for. B. be formed by a dovetail groove and a rail can be fitted with a locking possibility in the longitudinal direction.

In addition, in such a system in a smallest unit depending on the requirement optionally one of the two optoelectronic sensors connected to the tripod and used for photogrammetric measurement purposes.

A further increase in diversity is obtained by the system according to the invention if, in addition, at least one transverse bar is provided, which is provided with an identical connection structure and can be connected correspondingly to the counterstructure of the stationary. The transverse bar has at least two counter-structures identical to the counter-structure of the stationary, so that at least two opto-electronic sensors can be fixed to the counter-structures of the cross-bar at the same time with the connecting structures located on their housings. With such an additional element, the system then offers the possibility of using two optoelectronic sensors in a predefined arrangement relative to one another in order to use this to image an object to be measured from two viewing angles and to obtain therefrom positional information about points to be measured. Important for the system as a whole is that the connection structures and counter-structures are each formed identically, so that a simple connection of the individual elements with each other can be made according to the requirements. Preferably, such a connection then takes place without adapters or intermediate pieces, although it is quite possible for existing in such a system existing Component with other connectors with matching adapters.

The system according to the invention can advantageously comprise at least two, possibly even more tripods, each having identical counter-structures. Such a system allows the simultaneous arrangement of at least two optoelectronic sensors at individually selectable, different positions in the measuring chamber in order to be able to realize the corresponding structure of a measuring arrangement for those measuring applications where this is necessary.

The at least two optoelectronic sensors should be of the same type and function. In this way, different optoelectronic sensors can be arranged in space for specific measurements (eg on different tripods, on a tripod by means of a crossbeam or in mixed structures) in order to take pictures of the object to be measured with them from different directions in space the measuring points are then evaluated.

The system can also contain at least two optoelectronic sensors of different types. For certain measurement applications, for example dynamic measurements with high temporal resolution, optoelectronic sensors of a different type are used than in the case of conventional structures with a static object to be measured. So if the system contains different opto-electronic sensors, it can cover the different requirements for a wide variety of measurements.

Depending on the object to be measured, it may be sufficient to take into account the distinctive features of the building itself as measurement marks for the evaluation. Often, however, measuring markings will have to be affixed to the object to be measured, which form the basis for orientation in the later evaluation. Corresponding measuring markings can therefore be part of the system according to the invention.

Furthermore, as part of the system according to the invention, at least one measuring probe can be present, which has a probe tip which can be applied to a point to be measured and a probe body provided with measuring markings, on which the probe tip is fixed. Such probes are known, they are used in particular, if the system not visible, hidden measuring points are to be measured.

A further component of the system according to the invention may finally be a control and evaluation unit which controls the measurement and evaluates the recordings of the optoelectronic sensor or of the optoelectronic sensors for determining the coordinates of measuring points. This control and evaluation unit is preferably connected to the data transmission with the optoelectronic sensor (s) used for the measurement wirelessly.

Further advantages and features of the invention will become apparent from the following description of an embodiment with reference to the accompanying, sketch-like figures.

Showing:

1 schematically different measuring structures built with a system according to the invention for the construction of photogrammetric measuring arrangements,

2 in a schematic enlarged view of the connection of an optoelectronic sensor of the system arranged in a housing of the system to a crossbar with the representation of connecting structure and counter-structure,

3 schematically the representation of connection structure and counter-structure for the connection of an in-housing optoelectronic sensor with a tripod and

3 again to clarify the interchangeability of the individual system components with each other for the flexible formation of different photogrammetric measuring arrangements.

In the figures, by means of which an embodiment of a system according to the invention for the construction of photogrammetric measuring arrangements is described, such is and the individual components with the relevant structures are shown in a highly schematic manner. In 1 different possible structures are outlined that can be realized with the system according to the invention.

According to the invention, the system includes at least one tripod 1 and at least two optoelectronic sensors 2 , the latter each in a housing 3 are arranged.

Optionally, the system can add more tripods 1 and one or more transverse bars provided for connection to a tripod 4 in which at least two optoelectronic sensors 2 angle and position stable and detachable can be connected.

These are on the housings 3 the optoelectronic sensors 2 connecting structures 5 molded, which in the embodiment shown as one-sided with a guide 6 provided pegs are formed. Corresponding counterstructures 7 , Here as a correspondingly shaped pin receptacle with a in the guide groove 6 matching latch projection 8th trained, are - identically formed - in the tripods 1 , more precisely at the top, as well as in the transom 4 , also there in the top, shaped. This is in the enlarged, schematic representations in the 2 and 3 to recognize.

Not shown is that also the crossbar 4 a connection structure 5 , in this example in the same pin shape with guide 6 has on its underside, so that also the crossbeam 4 readily with a tripod in the manner described above 1 can be connected.

The 4 illustrates once again the simple interchangeability of the individual components of the modular system, with the highly flexible using a comparatively few of the costly individual components, the most diverse photogrammetric measuring arrangements can be formed.

The optoelectronic sensors shown here only schematically 2 may be the same design, but it can also for different measurement applications different optoelectronic sensors 2 be used and part of the system, in particular those for recording dynamic dynamic processes with high-resolution recording speed and those for static images, which bring with it a higher pixel resolution.

Further possible components of the system according to the invention may be measurement marking and measuring probe as well as a control and evaluation unit which measuring marks and measuring probes as well as control and evaluation unit are used and used in the usual way, therefore not further illustrated here.

From the above description of an embodiment shown schematically results once again that the invention provides a highly flexible and versatile system available, which is constructed of comparatively few individual components and so far cost and a multiple use in the form of very different realized from it Measurement setups possible.

LIST OF REFERENCE NUMBERS

1

tripod

2

optoelectronic sensor

3

casing

4

crossbeam

5

connecting structure

6

guide

7

counter-structure

8th

locking projection

Claims (9)

System for constructing photogrammetric measuring arrangements with at least two optoelectronic sensors ( 2 ) and at least one tripod ( 1 ), the optoelectronic sensors ( 2 ) in sensor housings ( 3 ) and the sensor housing ( 3 ) each having an identical connection structure ( 5 ) and where on the tripod ( 1 ) a counter structure ( 7 ) for releasably, angularly and positionally stable connection with the connection structure ( 5 ) on the sensor housing ( 3 ) optionally one of the optoelectronic sensors ( 2 ) is arranged. System according to claim 1, characterized in that it further comprises one with one of the connection structures ( 5 ) the sensor housing ( 3 ) identical connection structure ( 5 ) provided crossbars ( 4 ) to the substantially horizontal, detachable connection to the tripod ( 1 ), which transverse bar ( 4 ) at least two spaced apart in its longitudinal direction, to the counter-structure ( 7 ) on the tripod ( 1 ) identical counterstructures ( 7 ) for releasably, angularly and positionally stable connection in each case with the connection structure ( 5 ) one of the sensor housings ( 3 ) of the optoelectronic sensors ( 2 ) having. System according to one of the preceding claims, characterized in that it has at least two stands ( 1 ), each with identical counterstructures ( 7 ) are provided. System according to one of the preceding claims, characterized in that the at least two optoelectronic sensors ( 2 ) are of the same type and function. System according to one of the preceding claims, characterized in that it comprises at least two optoelectronic sensors ( 2 ) of different types. System according to one of the preceding claims, characterized in that it further comprises attachable to an object to be measured measurement marks. System according to one of the preceding claims, characterized in that it further comprises at least one probe with an attachable to a point to be measured probe tip and provided with measuring marks probe body on which the probe tip is fixed has. System according to one of the preceding claims, characterized in that it further comprises a control and evaluation unit which controls the measurement and the recordings of the opto-electronic sensor ( 2 ) or the optoelectronic sensors ( 2 ) evaluates for a coordinate determination of measuring points. System according to claim 8, characterized in that the control and evaluation unit for data transmission with the or the optoelectronic sensor (s) used for the measurement (s) ( 2 ) is wirelessly connectable.

Images