DE102015119440A1 - Method and device for detecting interchangeable components present on a coordinate measuring machine, such as sensor head - Google Patents

Abstract

The invention relates to a method for identifying at least one interchangeable component present on a coordinate measuring machine, which is at least partially detected by at least one optical sensor integrated in the coordinate measuring machine.

Description

The invention relates to methods and devices for detecting one or more existing in a coordinate measuring machine, in particular arranged on a sensor base or in a changing station interchangeable components such as sensor head.

Coordinate measuring machines according to the prior art are corresponding to different components, in particular a plurality of sensors, measuring head systems or stylus systems, but also hinges, pivot joints or rotary-pivot joints or rotary-pivot devices DIN EN ISO 10360-1: 2003 Can be equipped in one device. The stylus system refers to the unit consisting of several components, such as one or more buttons (eg star styli), each consisting of stylus shaft and stylus element, which are based on stylus extensions. The stylus system, exchangeable via an optional stylus change system, starts from a measuring head, which in turn is attached directly to the quill of the CMM via a measuring head changing system or indirectly via a measuring head extension. Stylus system, optional probe changing system, measuring head, optional measuring head changing system and optional measuring head extension form the measuring head system.

The sleeve is usually displaceable in the vertical direction (Z-axis) within the coordinate measuring machine. Coordinate measuring machines also have at least two further horizontally extending axes (X and Y axis), which position a workpiece to be measured or the sensor. Other assignments of the directions of movement between the sensor and sleeve and workpiece are also state of the art and covered by the present invention.

All configurations of the parts of the measuring head system interchangeable fixed on the coordinate measuring machine are referred to below as the sensor head, regardless of whether it is a stylus system (interchangeable at the probe change system) or measuring head (interchangeable at the gauge change system). In the case of optical sensors, the probe system is understood to mean an exchangeable part of the optical sensor. This can be a single lens, e.g. B. additional lens or a unit of several modules. If a complete optical sensor can be replaced, it can be described as a measuring head. The same applies to tactile-optical or other sensors. Again, the term sensor head is used in the following.

A sensor head can instead of the quill also from a hinge or Schwenkgelenkt or rotary / pivot joint or rotary-pivot device fixed or interchangeable over the gauge change system, the hinge emanating from the quill. The joint can in turn be interchangeable arranged on the quill. Exchangeable hinges or other quill-replaceable components such as temperature sensors, vibration sensors, transmission modules, light sources, receiver modules, switches, guards, panels, display modules, etc., and replaceable sensor heads are collectively referred to as replaceable components.

The part of the sensor firmly connected to the sleeve or the joint is referred to below as the sensor base. In the case of replacement of a stylus system, the term sensor base is used for the part of the sensor from which the probe system is interchangeable. In the case of interchangeable joints or other components, the term sensor base is also used for the part from which the joint or component is interchangeable.

Sensors are, for example, tactile sensors (buttons), optical sensors and tactile-optical sensors. All sensors are also available in configurations in which the sensors are each subdividable in sensor base and interchangeable sensor head. The corresponding sensors can therefore be operated with different sensor heads, either attached to the sensor base or stored in a changing station (parking station). Manual removal and loading by an operator is also possible. The above-mentioned joints or other components are automatically stored in changing stations. Change stations are usually attached to the measuring workpiece receiving measuring table. But there are also coordinate measuring machines are known in which the change station is attached to another part of the coordinate measuring machine. To enable an automatic change, the sensor and change station must be movable relative to each other.

Optical sensors include, for example, image processing sensors, Foucault principle laser distance sensors, triangulation sensors, laser line sensors, photogrammetry sensors, streak projection sensors, stereo cameras, stereoscopic sensors and light field cameras.

In the DE10057284 is a tree-like identification of the sensor head used in each case for measurement (referred to here as a button), wherein in a first identification a simple physical characteristic, for example, a resistor is detected and then at a second identification a digital identifier is detected in the button. In this case, an energy transfer between probe and sensor base (referred to here as a means for attaching the button) must take place.

The DE19631425 uses a frequency-defined signal for identification. Here, too, an energy transfer takes place.

In the EP236414 A method for identifying a sensor head designated there as a tool, in which a resistance value integrated in the sensor head is read out, is likewise described. For this purpose, a plurality of electrical connection lines is provided.

A similar approach is in the WO 03/002296 described, with electrical connections are also provided to read a built-in sensor head digital memory. It is advantageous that two connecting lines suffice.

Of the US5825666A is a sensor to remove, on which different buttons can be arranged. In the sensor, a camera above (on the side facing away from the workpiece to be measured) of the probe is also firmly integrated, which detects a brand attached to the top (of the workpiece averted) end of the probe. Based on the brand, the currently used button can be identified. The button itself is not detected by the camera. The use of other, other sensor heads is not provided. In particular, standard push-buttons, such as the push-buttons or optical sensors marketed by Renishaw PLC or Zeiss Industrial Metrology, for example as used in the coordinate measuring machines of Werth Messtechnik GmbH, can not be used since corresponding interfaces and suitable brands are not provided.

Disadvantages of the prior art is that the energy transfer between the component or sensor head and sensor base require electrical components in the sensor head, which alone can cause a disturbance of the measurement with the corresponding sensor due to their weight. In addition, a mechanical or electrical connection between the component or sensor head and sensor base is required, which can also adversely affect the accuracy of the measurement. Additional optically detectable marks on the component or sensor head can also disturb the measurement. In addition, the universal applicability is not guaranteed, so any types of components or sensor heads can not be used. Another disadvantage is that the component or the sensor head itself is not detected. If an incorrect or ambiguous mark is attached to the component or sensor head, proper identification may fail, resulting in collisions between the component or sensor head and the workpiece or coordinate measuring machine.

Object of the present invention is to avoid the disadvantages of the prior art and to measure accurately and in particular to ensure universal applicability for different components or sensor heads. In particular, no additional parts are to be arranged for identification in a component, in particular in a sensor head, or these are carried out particularly easily, at least with respect to their weight. Preferably, a contactless identification should take place. For a reliable identification, the component or the sensor head itself is to be detected particularly preferably. It should also be possible to determine the specific design of the sensor head, so for example, the position and dimensions of the probe or the probe system.

The object is essentially achieved by the present invention in that the component or the sensor head is identified by an optical sensor, such as an image processing sensor. According to an alternative solution, the invention provides for a passive RFID tag in the component or in the sensor head, which is identified by an RFID reader (RFID reader) arranged outside the component or the sensor head ,

RFID tags are small transponders which contain RFID tags, in this case information about the sensor head, as stored data and transmit these to RFID readers wirelessly. In contrast to active RFID tags, passive RFID tags do not supply power and are therefore extremely easy to implement. Passive RFID tags therefore have a virtually unlimited lifetime and can be read through all non-metallic materials regardless of the reading angle, light or other environmental influences. To read the transponder, the reader builds up an electromagnetic field. Within this field, the transponder is activated and sends back its information, also by means of electromagnetic waves. The information is captured by the reader, decoded and provided for further data processing at an interface. Basically, the system consists of two components, the mobile or stationary reading unit and the non-contact readable and therefore miniaturizable tag.

An advantage of the invention is that the position of a component such as sensor head In particular, a measuring head such as buttons in the change station, so the place where it is located, may be arbitrary and not preconfigured, so there must be no assignment of components or sensor heads to the squares of the change station in the software for operating the coordinate be deposited.

The present invention relates to a method for identifying at least one interchangeable component present on a coordinate measuring machine, such as sensor head, in particular stylus system and / or measuring head, which is characterized in that at least one component such as sensor head with at least one integrated in the coordinate measuring optical sensor such as camera is partially detected, in particular the component such as sensor head itself, d. H. in total, is recorded.

As mentioned, the sensor head is also understood to mean interchangeable parts of other sensors other than tactile measuring head systems. In particular, these are additional lenses in optical sensors or a replaceable measuring head, which contains several components such as lenses and camera. There are also optical sensors that can be mounted replaceably in their entirety at corresponding, usually variably designed for multiple sensors or measuring heads change interfaces on the quill of the coordinate measuring machine. These sensors or measuring heads should also be identified according to the invention. This can be done, for example, by detecting the outer contours or characteristic features such as brands, eg. As bar codes, done on the measuring head, which are easily detected from the outside by a camera.

If the coordinate measuring machine has a swivel joint or swivel joint or swivel joint which can be interchangeably arranged on the quill and to which in turn the measuring head change system or another measuring head or sensor is attached, the joint is also understood to mean a measuring head or, more generally, a component which can be identified, analogous to the procedure described above for sensors or measuring heads. The same applies to other exchangeable components, such as those mentioned above.

In the case of buttons or stylus systems, the outer contour detected in the recorded image is preferably determined. This gives information about the geometric characteristics of the probe, so for example length of the stylus and diameter of the stylus element, usually a ball, but also the material based on the color or even the presence of multiple buttons within a stylus system. In the same way, styli of tactile-optical sensors can be identified. These sensors are distinguished by the fact that the probe is detected by a camera arranged above the probe for measuring the deflection during measurement operation and optionally further optical sensors such as distance sensors for vertical deflection of the probe or a mark associated with the probe are integrated in the sensor head. The styli are usually flexible, so bending elastic and designed with diameters below 200 microns. A corresponding micro-probe is, for example, the Werth fiber key WFP of the applicant.

The determination of the outer geometric dimensions or external features represents an advantage of the invention, for example compared to the above-mentioned US5825666A Thus, it is possible with a universal outer (not in the sensor or sensor head integrated) detection system, namely the optical sensor according to the invention to detect the sensor head itself. This allows for maximum flexibility in detecting different types of sensor heads, types of sensors or ancillary equipment such as the above-mentioned joints.

• 1. Die Kamera bzw. mehrere Kameras sind fest am Koordinatenmessgerät angeordnet und die zu identifizierende Komponente wie Sensorkopf wird an der Pinole angeordnet und mittels der Messachsen des Koordinatenmessgerätes in den Sichtbereich der Kamera bewegt.
• 2. Die Kamera wird an der Pinole befestigt und wird durch die Messachsen des Koordinatenmessgerätes so positioniert, dass in der Wechselstation abgelegte Komponenten bzw. Sensorköpfe in den Sichtbereich der Kamera gelangen.
• 3. Eine oder mehrere Kameras sind in der Wechselstation integriert und erfassen die dort abgelegten Komponenten bzw. Sensorköpfe.

For the arrangement of the optical sensor, hereinafter also referred to as a camera for simplicity, or the method for its identification, the invention provides three basic variants, which are described in more detail below:

• 1. The camera or multiple cameras are fixedly arranged on the coordinate measuring machine and the component to be identified as the sensor head is placed on the quill and moved by means of the measuring axes of the coordinate measuring machine in the field of view of the camera.
• 2. The camera is attached to the quill and is positioned by the measuring axes of the coordinate measuring machine in such a way that components or sensor heads deposited in the change station reach the field of view of the camera.
• 3. One or more cameras are integrated in the change station and record the components or sensor heads stored there.

Preferably, it is provided that a separate optical sensor is used as the optical sensor and the component or the sensor head is identified after attachment to an emanating from the coordinate measuring sensor base, wherein the component or the sensor head using the coordinate measuring machine axes in the field of view of the optical sensor is moved, wherein the optical sensor is preferably arranged adjacent to the coordinate measuring machine associated change station or integrated into this.

The basic advantage of using a camera is mentioned, for example, in comparison to the use of RFID tags or direct electrical connections to the sensor head, the geometry, in particular length and diameter of the probe are determined directly and not only the presence of a certain so-called plate, of which Probe stem goes out and is attached to the change interface (probe change system). Otherwise, for example, an RFID tag would have to be attached directly to the probe shaft, which, however, results in considerable disadvantages. For example, this would change the geometry and thus the metrological properties of the probe or corresponding brands can only be integrated in a limited selection of styli, since styli are also made of solid metal.

The advantage of the arrangement of a single camera within or near the changing station has the particular advantage that in the image recording static, so always prevail the same conditions, in particular lighting conditions. Since the image is always taken in the same place, for example, measures for shielding ambient light are easily feasible.

The disadvantage, however, is the time required to drive with each substitute sensor head to the camera position using the coordinate measuring machine axes. Conveniently, the camera is therefore located near the change station and the start of the camera position can be done automatically when removing a sensor head from the change station. After a cleaning or other maintenance work on the device or after the manual replacement of the sensor heads arranged in the places of the changing station by an operator, with an automatic program the replacement and detection of all the sensor heads can take place automatically in succession with the camera.

The invention is also characterized in particular by the fact that an optical sensor attached to the quill of the coordinate measuring machine or replaceably mounted optical sensor is used, which is preferably used alternatively for measuring the workpiece or can be used, wherein the component or the sensor head before the Removal is identified from a change station assigned to the coordinate measuring machine by moving the optical sensor by means of the coordinate measuring machine axes in such a way that the component or sensor head deposited in the change station is detected or several components or sensor heads deposited in the change station are detected simultaneously.

Advantage in the arrangement of the camera on the sleeve of the coordinate measuring machine is that with little time successively or partially gelichzeitig, insofar as the detection range of the camera allows, the field of view of the camera is so large that, in particular all sensor heads in the change station can be identified. Again, an automatic program is conceivable. If only a few places of the changing station are occupied, this is preferably taken into account in the automatic program and approached only occupied seats. The occupancy of a place can be recorded by corresponding indicators in the change station.

A disadvantage is the more complex effort for the integration of the optical sensor on the quill of the coordinate measuring machine. This integration requires connection cable for image transmission through the moving measuring axes of the coordinate measuring machine. However, there are also coordinate measuring machines that are already equipped accordingly and have optical sensors, in particular image processing sensors with a camera, in particular multi-sensor coordinate measuring machines, the image processing sensors may also be suitable for measuring the workpiece and possibly even these image processing sensors themselves in one or the same change station can be stored. Particularly advantageously, the image processing sensors are attached via pivot / Schenk joints on the quill of the coordinate measuring machine, whereby the detection of the sensor heads is also possible from different directions. This allows, for example, the detection of complex stylus systems, such as star probes, which can not be completely identified from one direction. However, it is also disadvantageous that the lighting conditions can vary depending on the position (space) of the sensor head to be detected in the changing station. In order to ensure reliable detection, appropriate measures such as light control or the use of suitable filters in image processing are necessary.

It should also be emphasized that one or more optical sensors, preferably cameras, are permanently assigned to the changing station, wherein one camera records several, preferably all, components or sensor heads arranged in squares or the several cameras respectively a plurality of components or sensor heads arranged in squares capture, or that each place of the changing station, an optical sensor, preferably camera, is assigned and the respectively arranged in the space component or sensor head is detected with the camera.

Advantageous in the detection of the sensor heads with fixed arranged in the changing station Cameras it is that hardly a loss of time occurs and that a high resolution for the recorded images can be reached, whereby the dimensions of the respective probe or measuring heads can be determined very accurately. However, a disadvantage is the increased cost and expense of the multiple cameras and the conversion of changing stations, for example, when arranged at another position within the coordinate measuring machine.

The use of at least one fixed camera, which detects the sensor heads of all places or at least several places of the changing station is that a detection in real time is possible. The disadvantage, however, is that corresponding cameras must have particularly high resolutions in order to allow accurate detection of the dimensions of the sensor heads. The lighting conditions are also to be observed with several sensor heads to be detected simultaneously. In addition, it must be noted that several change stations can also be provided in a coordinate measuring machine, which can be arranged on different sides and in different orientations. Therefore, one or more separate cameras are usually necessary for each change station. In addition, the possibly different lighting conditions are to be included or to ensure good lighting conditions.

• – Durchmesser des Tastelementes und/oder
• – Lage und/oder Orientierung und/oder Länge und/oder Durchmesser des Tasterschaftes und/oder
• – Farbe und/oder Form einer dem Sensorkopf zugeordneten Marke, beispielsweise Strichcode bzw. Barcode eines Tasters oder der mehreren Taster eines Tastersystems ermittelt wird.

Preferably, the invention provides that at least one image of the sensor head is detected with the optical sensor, wherein in the image or images

• - Diameter of the probe element and / or
• - Location and / or orientation and / or length and / or diameter of the probe shaft and / or
• - Color and / or shape of the sensor head associated brand, such as bar code or bar code of a button or the multiple buttons of a stylus system is determined.

Particularly preferably, it is provided that the sensor head is detected from the side. This means that the optical axis of the image captured by the camera is oriented perpendicular or nearly perpendicular to the axis of the probe shaft. This allows a particularly accurate and simple detection of the entire stylus geometry and represents a significant difference to the teaching of US5825666A represents.

Particularly important for the identification and subsequent measurement with the replacement sensor head is the knowledge of the position or orientation and dimensions of the probe. These are determined reliably and directly with the camera. An incorrect configuration and the associated collision risk are almost completely excluded.

In particular, the invention provides that areas of the component or of the sensor head to be detected for identifying the component or the sensor head are detected by a single image or by a plurality of images taken offset from one another.

The recording of multiple images is necessary if the image area is not sufficient for the possibly required optical magnification for a very accurate determination of the geometry of the probe.

It should also be emphasized that after equipping the places of the change station with components or sensor heads at least one or more, in particular all components or sensor heads with at least one optical sensor are identified and the information on the identified components or sensor heads for further operation be provided of the coordinate measuring machine.

According to a particularly emphasized proposal, it is provided that an optical sensor replaceably mounted on the quill of the coordinate measuring machine is used for identification and is preferably automatically deposited in a changing station after identification or is removed manually.

This allows, for example, the space-saving use of an already integrated in a coordinate measuring machine optical sensor such as image processing sensor.

To achieve the object according to the invention, the present invention essentially also provides a device for identifying at least one replaceable component or sensor head present on a coordinate measuring machine, in particular probe system and / or measuring head, the coordinate measuring machine having a changing station with a plurality of locations for accommodating a plurality of components or sensor heads which can be fastened to a sensor base emanating from the quill of the coordinate measuring machine, which is characterized in that the coordinate measuring machine comprises one or more optical sensors for detecting the component or the sensor head or a part of the Component or the sensor head, in particular the component or the sensor head itself is designed or are, wherein the optical sensor or one of the optical sensors on the sleeve of the coordinate measuring machine is fixed or interchangeable and / or arranged r or more separate optical sensors on the coordinate measuring machine, preferably adjacent to the coordinate measuring machine associated change station or are integrated into this, and / or that each place of the changing station is associated with an optical sensor.

Preferably, it is provided that the optical sensor is an image processing sensor and is designed to record images of at least one part of the component or the sensor head or the entire component or sensor head or more components or sensor heads successively or simultaneously and that the image processing sensor with a for evaluation the image is connected to suitable control, which in turn is connected to the control of the coordinate measuring machine.

The present invention also relates to a method for identifying at least one interchangeable component present on a coordinate measuring machine, such as sensor head, in particular probe system and / or measuring head, which is characterized in that at least one passive RFID mark integrated in the sensor head is equipped with at least one outside Component or the sensor head arranged RFID reader is detected, wherein the RFID tag contains information about the component or the sensor head.

Passive RFID tags are particularly small, for example, with about one square millimeter of footprint and less than a millimeter thick available. They are thus particularly easy. In addition, they need no power supply and no mechanical contact for reading, so there are no connection lines necessary. The measurement with the respective sensor head is thereby hardly or not disturbed. The reading device can be arranged according to the above-explained three methods with respect to the position of the optical sensor.

Preferably, it is provided that the component or the sensor head is identified after attachment to an emanating from the coordinate measuring sensor base, the component or the sensor head is moved by means of coordinate axes in the detection range of the RFID reader, the RFID reader preferred next to the coordinate measuring machine associated change station or is integrated into this.

The invention is also characterized in particular by the fact that an RFID reader is attached to the quill of the coordinate measuring machine or is mounted interchangeable, wherein the component or the sensor head is identified before removal from a coordinate measuring machine associated change station by the RFID reader is moved by means of the coordinate measuring machine axes in such a way that the component or sensor head stored in the changing station is located in the detection area of the RFID reading device.

Particularly noteworthy is further that at least one or more, in particular each place of the changing station, an RFID reader is permanently assigned and each arranged in the space component or sensor head is detected with the RFID reader.

Preferably, the invention provides that probe system and measuring head, and preferably measuring head extension, of a measuring head system have separate RFID tags, which are all detected.

This results in the possibility to identify different inserted measuring head extensions or similar intermediate pieces in addition to the probe system or measuring head.

In particular, the invention provides that after equipping the places of the change station with components or sensor heads, the RFID tags of at least one or more, in particular all components or sensor heads are identified and the information on the identified components or sensor heads for further operation be provided of the coordinate measuring machine.

It should also be emphasized that an RFID reader replaceably fastened to the quill of the coordinate measuring machine is used for identification and is preferably automatically deposited in a changing station after identification or is removed manually.

According to a further solution of the object of the present invention, the present invention essentially also provides a device for identifying at least one interchangeable component present on a coordinate measuring machine, such as sensor head, in particular probe system and / or measuring head, wherein the coordinate measuring machine has a changing station with a plurality of locations for holding a plurality of components or Sensor heads, which are attachable to an emanating from the sleeve of the coordinate measuring machine sensor base, before, which is characterized in that the coordinate measuring machine has an RFID reader or more RFID readers, the or for detecting at least one in the component or Sensor head integrated RFID mark is designed or are, wherein the RFID tag contains information about the component or sensor head, and wherein the RFID reader or one of the RFID Readers on the quill of the coordinate measuring machine is fixed or interchangeable and / or one or more separate RFID readers on the coordinate measuring machine, preferably next to the coordinate measuring machine associated change station or integrated into this, and / or that each place the changing station is an RFID reader assigned.

Preferably, it is provided that the RFID reader is designed to read the information from the RFID tags, and is connected to the control of the coordinate measuring machine.

Further details, advantages and features of the invention will become apparent not only from the claims, the features to be taken from them - alone and / or in combination - but also from the following description of the figures.

Show it:

1 1 is a schematic representation of a device according to the invention in a first embodiment with an optical sensor or RFID reader integrated in a change station for identifying a component or sensor head emanating from the sensor base;

2 a schematic diagram of a device according to the invention in a second embodiment with attached to the quill of the coordinate measuring optical sensor or RFID reader for identifying a arranged in a changing station component or sensor head and

3 a schematic diagram of a device according to the invention in a third embodiment with integrated in a changing station optical sensor or RFID reader for identifying a arranged in a changeover station component or sensor head.

In the 1 a first variant according to the invention is shown in which an optical sensor 1 , preferably a camera, or an RFID reader 2 at a change station 3 is arranged. The change station 3 usually has several magazine locations 3-1 to 3-4 in which single or multiple components 8th - 10 together, but preferably also the optical sensor 1 or the RFID reader 2 can be automatically filed and resumed. Shown are stored components only the stylus systems 8b . 8c and 8d , However, it can also be the button extension 7 , with or without attached probe system, the measuring head 6 or the rotary-swivel device 9 be filed. The change station 3 goes from a measuring table 4 out on that with the one at a sensor base 5 (Also called quill) attached measuring system to be measured object (not shown here) is arranged. The measuring table 4 itself may be fixed with respect to the coordinate measuring machine, which is only partially shown, with the movement between the sensor base 5 and measuring table 4 in all three spatial directions then by moving the sensor base 5 done, or the measuring table 4 Moves itself in one, two, or three spatial directions in which the sensor base 5 then each remains correspondingly unmoved. Corresponding coordinate measuring machine types are, for example, coordinate measuring machines with a moving bridge (measuring table is stationary), coordinate measuring machines with a fixed bridge (measuring table 4 moves in a direction perpendicular to the quill direction) and coordinate measuring machines with cross table, also referred to as desktop devices (measuring table 4 moves in both directions perpendicular to the quill direction), the quill direction in the 1 runs in the vertical of the drawing plane.

From the sensor base 5 starting and moving with this at least the measuring head 6 , To the reference 6 Also include an optionally used measuring head extension and the optional measuring head changing system that the sensor base 5 is facing. From the measuring head 6 goes the button extension 7 which may also include a button change system, which is the button system 8th is facing. The stylus system 8th consists of the probe shaft and the probe elements, here for example a star key. The entirety of the components is used here as a sensor head 10 designated. Between sensor base 5 and measuring head 6 can also be a rotary-swivel device 9 be arranged to adjust the orientation of the measuring head 6 is used in the room. sensor head 10 and rotary-swivel devices 9 are referred to herein as components.

To identify each of the sensor base 5 outgoing, used for the next measurement or measurements sensor head 10 or components 6 to 10 is the sensor head or component or one or more parts thereof, such as the measuring head 6 and / or the button extension 7 and / or the stylus system 8th , and / or but also the rotary-pivot device 9 by using the coordinate measuring machine axes not shown here in the field of view of the optical sensor 1 moved and with the optical sensor 1 one or more pictures taken and evaluated.

Alternatively or additionally, the invention provides that each component to be identified is an RFID tag 11 (by way of example only on the measuring head 6 drawn) contains information about the Component or the sensor head 10 contains, and in place of the optical sensor 1 or additionally an RFID reader 2 is arranged. For identification, the respective component with the coordinate measuring machine axes is positioned in front of the RFID reader 2 positioned that particular RFID brand 11 can be read out.

It is also provided, sensor 1 or RFID reader 2 next to the change station 3 to arrange, for. B. on the measuring table 4 from which the change station 3 emanates. It is also provided as an alternative, sensor 1 or RFID reader 2 directly or together with the change station 3 , next to the measuring table 4 to arrange, with the movement of the sleeve or sensor base 5 then in all three spatial directions with respect to the sensor 1 or RFID reader 2 is provided, the measuring table 4 so do not move yourself.

The 2 shows a schematic diagram of a device according to the invention in a second embodiment, wherein the optical sensor 1 or alternatively or additionally, the RFID reader 2 from the sensor base 5 go out directly and in particular are firmly connected to this, or wherein the optical sensor 1 or alternatively or additionally, the RFID reader 2 indirectly from the sensor base 5 go out, for example, as shown, from the measuring head 6 , or from the rotary-swivel device 9 , To identify the in the change station 3 deposited components 7 . 8a . 8c . 8d , In particular, the components to be used for the next measurement, the optical sensor 1 or the RFID readers 2 by means of the coordinate measuring machine axes so to the respective component to be identified 7 . 8a . 8b . 8d , or successively to several sections of the components, positioned so that they are within the field of view of the optical sensor 1 or their RFID brands 11 each within the detection range of the RFID reader 2 are arranged. It can be the individual components 7 . 8a . 8c . 8d or RFID brands 11 individually or several together are recorded. The optical sensor 1 or the RFID readers 2 can, for example, be exchanged at the sensor base 5 be arranged and automatically from the change station 3 be removable, for example, from the square 3-4 the changing station, and even after identification in this are filed. For alignment of the optical sensor, for example, the rotary-pivot device 9 have made a corresponding rotation.

m the 3 is a schematic diagram of a device according to the invention shown in a third embodiment, wherein the optical sensor 1 or the RFID reader 2 at or near the change station 3 are arranged and in the change station 3 deposited components 6 - 10 be identified. The optical sensor 1 or multiple optical sensors 1 or the RFID reader 2 or more RFID readers 2 In this case, they are arranged directly at the change station, wherein the corresponding mechanical connection is not shown for the sake of simplicity, or arranged in the vicinity thereof, that in each case one or more components simultaneously in the field of vision of one or more optical sensors 1 or the RFID brands 11 within the detection range of one or more RFID readers 2 are arranged. Exemplary is every place 3-1 to 3-4 the change station each an optical sensor 1 or associated with an RFID reader. However, it can also be provided that an optical sensor 1 several places 3-1 to 3-4 assigned.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10057284 [0009]
• DE 19631425 [0010]
• EP 236414 [0011]
• WO 03/002296 [0012]
• US 5825666 A [0013, 0023, 0036]

Cited non-patent literature

• DIN EN ISO 10360-1: 2003 [0002]

Claims (19)

Method for identifying at least one interchangeable component present on a coordinate measuring machine, such as sensor head, in particular stylus system and / or measuring head, characterized in that the component such as sensor head is at least partially detected with at least one integrated in the coordinate measuring optical sensor such as camera, in particular the component as the sensor head itself is detected. A method according to claim 1, characterized in that a separate optical sensor is used as the optical sensor and the component or the sensor head is identified after attachment to an emanating from the coordinate measuring sensor base, wherein the component or the sensor head using the coordinate measuring machine axes in the Viewing range of the optical sensor is moved, wherein the optical sensor is preferably arranged adjacent to the coordinate measuring machine associated change station or integrated into this. A method according to claim 1 or 2, characterized in that an optical sensor attached to the quill of the coordinate measuring machine or exchangeably mounted optical sensor is used, which is preferably used alternatively for measuring the workpiece or can be used, wherein the component or the sensor head before the removal is identified from the coordinate measuring machine associated change station by the optical sensor using the coordinate measuring machine axes is moved so that the stored in the exchange station, the component or the sensor head is detected or more stored in the exchange station components or sensor heads are detected simultaneously , Method according to at least one of the preceding claims, characterized in that the change station one or more optical sensors, preferably cameras are assigned permanently, wherein the one camera more, preferably all arranged in places components or sensor heads detected or the multiple cameras each more in squares detect arranged components or sensor heads, or that each place of the changing station, an optical sensor, preferably camera, is assigned and the respectively arranged in the space component or sensor head is detected with the camera. Method according to at least one of the preceding claims, characterized in that at least one image of the sensor head is detected with the optical sensor, wherein in the image or images - diameter of the probe element and / or - position and / or orientation and / or length and / or diameter of the probe shaft and / or - color and / or shape of the sensor head associated brand, such as bar code or bar code of a button or the plurality of buttons of a stylus system is determined. Method according to at least one of the preceding claims, characterized in that to identify the component or the sensor head to be detected areas of the component or the sensor head by a single image or by a plurality of images taken offset to each other are detected. Method according to at least one of the preceding claims, characterized in that after equipping the places of the change station with components or sensor heads at least one or more, in particular all components or sensor heads are identified with at least one optical sensor and the information on the identified components or Sensor heads are provided for further operation of the coordinate measuring machine. Method according to at least one of the preceding claims, characterized in that an optical sensor which is interchangeably attached to the quill of the coordinate measuring machine is used for identification and is preferably deposited automatically in a changing station after identification or is removed manually. Device for identifying at least one exchangeable component present on a coordinate measuring machine ( 6 . 7 . 8th . 9 . 10 ) or sensor head ( 10 ), in particular probe system ( 8a . 8b . 8c . 8d ) and / or measuring head ( 6 ), wherein the coordinate measuring machine a change station ( 3 ) with several places ( 3-1 . 3-2 . 3-3 . 3-4 ) for holding several components ( 6 . 7 . 8th . 9 . 10 ) or sensor heads ( 10 ) located on one of the quill ( 5 ) of the coordinate measuring machine outgoing sensor base ( 5 ) are fastened, characterized in that the coordinate measuring machine an optical sensor ( 1 ) or a plurality of optical sensors, the or for the detection of the component ( 6 . 7 . 8th . 9 . 10 ) or of the sensor head ( 10 ) or a part of the component or of the sensor head, in particular of the component or of the sensor head itself is or are, wherein an optical sensor ( 1 ) at the quill ( 5 ) of the coordinate measuring machine is fixed or interchangeable and / or one or more separate optical sensors ( 1 ) at the Coordinate measuring device, preferably next to the coordinate measuring machine associated change station ( 3 ) or integrated into it, and / or that each place ( 3-1 . 3-2 . 3-3 . 3-4 ) of the change station ( 3 ) an optical sensor ( 1 ) assigned. Apparatus according to claim 9, characterized in that the optical sensor ( 1 ) is an image processing sensor and is adapted to form images of at least a part of the component ( 6 . 7 . 8th . 9 . 10 ) or of the sensor head ( 10 ) or the entire component or sensor head or several components or sensor heads in succession or simultaneously and that the image processing sensor is connected to a controller suitable for evaluating the images, which in turn is connected to the control of the coordinate measuring machine. Method for identifying at least one exchangeable component present on a coordinate measuring machine, such as sensor head, in particular stylus system and / or measuring head, characterized in that at least one passive RFID mark integrated in the sensor head is detected with at least one RFID reader arranged outside the component or the sensor head , wherein the RFID tag contains information about the component or the sensor head. A method according to claim 11, characterized in that the component or the sensor head is identified after attachment to an emanating from the coordinate measuring sensor base, wherein the component or the sensor head using the coordinate measuring machine axes is moved into the detection range of the RFID reader, wherein the RFID reader is preferably arranged next to a coordinate measuring machine associated change station or integrated into this. A method according to claim 11 or 12, characterized in that an RFID reader is attached to the sleeve of the coordinate measuring machine or is mounted interchangeable, wherein the component or the sensor head is identified before removal from a coordinate measuring machine associated change station by the RFID Reading device using the coordinate measuring machine axes is moved so that the stored in the changing station component or sensor head is in the detection range of the RFID reader. Method according to at least one of claims 11 to 13, characterized in that at least one or more, in particular each place of the changing station, an RFID reader is permanently assigned and each arranged in the place component or sensor head is detected with the RFID reader. Method according to at least one of claims 11 to 14, characterized in that probe system and measuring head, and preferably measuring head extension, of a measuring head system have separate RFID tags, which are all detected. Method according to at least one of claims 11 to 15, characterized in that after equipping the places of the change station with components or sensor heads, the RFID tags of at least one or more, in particular all components or sensor heads are identified and the information on the identified components or sensor heads are provided for further operation of the coordinate measuring machine. A method according to at least one of claims 11 to 16, characterized in that an interchangeable attached to the quill of the coordinate measuring machine RFID reader is used for identification and is preferably deposited automatically after identification in a changing station or manually removed. Device for identifying at least one exchangeable component present on a coordinate measuring machine ( 6 . 7 . 8th . 9 . 10 ) like sensor head ( 10 ), in particular probe system ( 8a . 8b . 8c . 8d ) and / or measuring head ( 6 ), wherein the coordinate measuring machine a change station ( 3 ) with several places ( 3-1 . 3-2 . 3-3 . 3-4 ) for holding several components ( 6 . 7 . 8th . 9 . 10 ) or sensor heads ( 10 ) located on one of the quill ( 5 ) of the coordinate measuring machine outgoing sensor base ( 5 ) are fastened, characterized in that the coordinate measuring machine is an RFID reader ( 2 ) or a plurality of RFID readers, the or for the detection of at least one in the component ( 6 . 7 . 8th . 9 . 10 ) or sensor head ( 10 ) integrated RFID brand ( 11 ), wherein the RFID tag ( 11 ) Information about the component ( 6 . 7 . 8th . 9 . 10 ) or sensor head ( 10 ) and wherein an RFID reader ( 2 ) at the quill ( 5 ) of the coordinate measuring machine is fixed or interchangeable and / or one or more separate RFID readers ( 2 ) on the coordinate measuring machine, preferably next to the coordinate measuring machine associated change station ( 3 ) or integrated into it, and / or that each place ( 3-1 . 3-2 . 3-3 . 3-4 ) of the change station ( 3 ) an RFID reader ( 2 ) assigned. Device according to claim 18, characterized in that the RFID reader ( 2 ) is formed, the information from the RFID brands ( 11 ), and is connected to the control of the coordinate measuring machine.

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