EP4018153A1 - Measuring unit - Google Patents
Measuring unitInfo
- Publication number
- EP4018153A1 EP4018153A1 EP20751109.8A EP20751109A EP4018153A1 EP 4018153 A1 EP4018153 A1 EP 4018153A1 EP 20751109 A EP20751109 A EP 20751109A EP 4018153 A1 EP4018153 A1 EP 4018153A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring
- control unit
- machine
- unit
- measured value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
- G01B5/008—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points using coordinate measuring machines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
Definitions
- Measuring devices are known.
- a known measuring device comprises a robot arm on which an ultrasonic measuring head is mounted.
- the ultrasonic measuring head can be moved to defined positions by means of the robot arm in order to carry out a measurement using the ultrasonic measuring head at the defined position.
- a disadvantage of the known measuring device is that a position to be measured must first be defined. This means that the workpiece to be measured must first be measured with another measuring device so that the robot arm can move the ultrasonic measuring head to the position to be measured in such a way that an ultrasonic measurement can be carried out. Measurements with the measuring device are therefore comparatively time-consuming on the one hand and also comparatively unsafe and cost-intensive on the other hand, since the ultrasonic measuring head may be moved too far away or too close to the surface to be measured. In addition, with the known measuring devices it is comparatively complex to bring the generated ultrasonic measured values into agreement with the position coordinate of the measurement. Object and advantages of the invention
- the object of the present invention is to provide an improved measuring unit.
- the object of the present invention is in particular to provide an improved ultrasound measuring unit by means of which an especially automatic ultrasound measurement can be carried out comparatively quickly, safely and precisely.
- the invention is based on a measuring unit, in particular an ultrasonic measuring unit or from one
- Temperature measuring unit wherein the measuring unit has a measuring instrument and a control unit, wherein the measuring instrument is designed to measure an object to be measured, wherein the measuring instrument is designed to be able to be arranged on a machine.
- the measuring instrument is advantageously present as an ultrasonic measuring head or as an ultrasonic measuring probe.
- the measuring instrument is designed to measure a measurement object by means of ultrasonic waves.
- the measuring instrument is preferably present as a thermometer.
- the measuring instrument is designed as an optical thermometer.
- the machine is advantageously designed as a machine tool or as a measuring machine.
- the machine is available as a CNC machining center, for example.
- the machine tool is designed as a turning and / or milling center.
- the Machine tool several mutually movable machine axes.
- the machine tool is designed as a 3-axis or as a 5-axis machine tool.
- the measuring machine is designed as a coordinate measuring machine.
- control unit has an interface in order to connect the control unit directly to a control unit of the machine in particular, the control unit being coupled to the measuring instrument, the control unit receiving a measured value from a measuring signal of the measuring instrument from the measuring instrument, wherein the control unit is designed to transmit the measured value to the control unit of the machine by means of the interface.
- the control unit of the machine is designed, for example, as a numerical control, e.g. as a CNC (computerized numerical control).
- the measuring instrument advantageously generates one or more measurement signals when measuring a measurement object.
- the measured value is a layer thickness or material thickness of the measurement object measured by the measurement that is determined from the measurement signal. It is also conceivable that the measured value is present as a temperature value of the measurement object measured by the measurement.
- the interface is advantageously designed as a serial interface.
- the communication between the control unit and the machine is advantageously based on a synchronous, serial protocol.
- the interface is designed as a standard interface, for example as a standard data bus.
- the interface is available as a field bus, for example as a Profinet interface, as an EnDat interface or as an Ethernet interface.
- the Interface designed as an SPI (Serial Peripheral Interface).
- the interface has a signal line for serial data communication with the machine.
- the interface is designed, for example, as a serial and / or parallel interface.
- the interface is advantageously present in the form of a USB interface or in the form of a Firewire interface.
- the interface is a wired interface. This results in a comparatively safe transmission path. It also proves to be advantageous that the interface has a signal line for a power supply of the control unit and a signal line for a measured value transmission.
- the measuring unit preferably comprises a transmitting and receiving unit, the transmitting and receiving unit being designed to receive and process measured values generated by the measuring instrument. It is conceivable that the transmitting and receiving unit has the interface. It is also conceivable that the control unit is part of the transmitting and receiving unit. For example, the transmitting and receiving unit is coupled to the measuring instrument via a radio link and / or via an optical link.
- control unit and / or the transmitting and receiving unit communicate with the measuring instrument via a wireless communication channel.
- control unit and / or the transmitting and receiving unit communicate with the measuring instrument by means of optical signals and / or by means of radio signals.
- the optical signals are, for example, infrared signals.
- the radio signals are, for example, Bluetooth signals.
- the transmitting and receiving unit and the measuring instrument be connected to one another by means of a radio link communicate.
- the control unit and / or the transmitting and receiving unit and the measuring instrument preferably communicate by means of a WLAN interface, a Bluetooth interface and / or a cellular radio interface.
- the mobile radio interface is available, for example, as an LTE interface.
- control unit of the machine and the measuring unit communicate via a wireless communication channel.
- the measuring instrument includes the control unit.
- the control unit of the machine and the control unit communicate by means of optical signals and / or by means of radio signals.
- the optical signals are, for example, infrared signals.
- the radio signals are, for example, Bluetooth signals.
- control unit of the machine and the control unit communicate with one another by means of a radio link.
- the control unit of the machine and the measuring unit preferably communicate by means of a WLAN interface, a Bluetooth interface and / or a cellular radio interface.
- the mobile radio interface is available, for example, as an LTE interface.
- control unit have a single interface.
- control unit comprises a single interface in order to connect the control unit to the control unit of the machine.
- the measuring unit can be produced comparatively inexpensively. Communication with the machine is also simplified as a result.
- control unit has two mutually different interfaces, the control unit being connectable to the control unit of the machine via each of the two interfaces. This can ensure that information to be transmitted comparatively quickly, such as a trigger signal for Control of a movement of a machine axis, can be transmitted comparatively quickly from the machine to the measuring unit and vice versa.
- the measuring unit preferably comprises two interfaces, the measuring unit transmitting the trigger signal to the control unit of the machine via a first interface and the measuring unit reading out machine coordinates from the machine via a second interface.
- the two interfaces are advantageously physically separate from one another.
- the two interfaces are designed differently from one another.
- the control unit comprises the first and the second interface.
- the transmitting and receiving unit or the measuring instrument has the first interface.
- the first interface is designed as a proprietary interface.
- the first interface is designed, for example, to enable serial data transmission.
- control unit transmit the measured value to the machine as a digital data signal via the interface.
- the measuring unit has a probe unit, which is present on the measuring instrument, so that the measuring unit triggers a trigger signal when the measuring instrument touches a surface of a measuring object, the control unit being designed to send the trigger signal to the To send control unit of the machine.
- a contact event between the measuring instrument and a surface of the measuring object to be measured can advantageously be detected by means of the probe unit.
- the control unit is designed to forward the trigger signal to the machine on which the measuring instrument can be arranged, so that an axis movement of the Machine and thus a movement of the measuring instrument can be stopped.
- the touch unit is designed as a touching, in particular tactile, measuring sensor.
- the button unit advantageously comprises a switching element.
- the switching element is designed, for example, as a capacitive, optical or inductive sensor, in particular a button or switch.
- the touch unit includes a displacement and / or force sensor.
- the measuring instrument is designed to determine a deflection quantity of a probe element of the probe unit and / or a force of the probe element of the probe unit. It is conceivable that the probe unit detects or determines a distance between a reference surface of the measuring instrument and a surface to be measured and outputs a trigger signal after falling below a defined distance value, and thus detects the probe event.
- control unit is designed to transmit the trigger signal and the measured value to the control unit of the machine via the same interface, both the trigger signal and the measured value being transmitted as a digital data signal. In this way, communication between the measuring unit and the machine is advantageously standardized.
- the control unit is designed to transmit the trigger signal and the measured value to the control unit of the machine via two different interfaces, the control unit transmitting the measured value as a digital data signal and the trigger signal as an analog data signal. This ensures that the trigger signal can be transmitted to the machines in a comparatively short period of time after the signal has been triggered, and for example it is not necessary to wait for a comparatively long measured value to be transmitted first.
- control unit is designed to transmit the trigger signal and the measured value to the control unit of the machine via two different interfaces, with both the trigger signal and the measured value being transmitted as a digital data signal. In this way it can be ensured, for example, that the transmitted data are completely transmitted, for example by using a test method.
- the digital data signal by means of which the measured value is transmitted has a character length of 8 bits to 40 bits.
- the digital data signal by means of which the measured value is transmitted advantageously comprises a character length of exactly 32 bits, in particular exactly 40 bits.
- the digital data signal by means of which the measured value is transmitted, includes a test value in addition to the measured value.
- a test value in addition to the measured value.
- an error in the transmission of the digital data signal can be identified.
- the digital data signal comprises 32 bits of measured value data and 8 bits of test value data.
- the measuring unit is advantageously present as an ultrasonic measuring unit and / or as a temperature measuring unit.
- An advantageous variant of the invention is a machine, in particular a machine tool and / or measuring machine, with a measuring unit according to one of the aforementioned embodiments.
- Figure 1 is a schematic representation of a machine with a measuring unit according to a first variant
- FIG. 2 shows a schematic representation of a machine with a measuring unit according to a second embodiment variant.
- FIG. 1 shows a machine 1 with a schematically illustrated housing 2, a machine table 3, a movement axis 4 and a control unit 5.
- the machine 1 comprises, for example, a memory module 6, which is present on the control unit 5, for example.
- a measurement object 7 is arranged on the machine table 3, for example.
- a measuring unit 8 is advantageously arranged on the machine 1.
- the measuring unit 8 comprises a measuring instrument 9, a first interface 10, a second interface 11 and, for example, a third interface 12.
- the measuring unit 8 also comprises, for example, a transmitting and receiving unit 13.
- the transmitting and receiving unit 13 has, for example, a control unit 14 with a Control module 15 on.
- the measuring unit 8 can furthermore comprise a memory unit 16 and a timer 17.
- the measuring instrument 9 is coupled to the transmitting and receiving unit 13, for example, via the interfaces 10, 11 by means of a signal line 18.
- the signal line 18 is present, for example, as a wireless signal line.
- the signal line 18 is for example designed as a radio link or a radio channel. It is also conceivable that the signal line 18 is designed as an optical connection, for example as an optical line channel.
- the transmitting and receiving unit 13 is connected by means of the interface 12 to the machine 1, in particular the control unit 5 of the machine 1, via a further signal line 19.
- the measuring instrument 9 is designed as an ultrasonic measuring head and / or as a thermometer.
- a further interface 20 is present on the transmitting and receiving unit 13, wherein the transmitting and receiving unit 13 can be connected to the machine 1 by means of the interface 20 via a further signal line 21 .
- one of the two interfaces 12, 20 is designed as a standard interface, e.g. as a USB or network interface.
- the other of the two interfaces 12, 20 is designed as a proprietary interface.
- the control unit 14 can communicate with the machine 1 via the proprietary interface 12, 20 by means of a serial data transmission.
- the control unit 14 is designed to transmit a measured value to the machine 1 via the standard interface and a trigger signal via the proprietary interface.
- FIG. 2 shows a machine 22 with a schematically illustrated housing 23, a machine table 24, a movement axis 25 and a control unit 26.
- the machine 22 includes, for example, a memory module 27, which is present on the control unit 26, for example.
- a measurement object 28 is arranged on the machine table 24 as an example.
- a measuring unit 29 is advantageously arranged on the machine 22.
- the measuring unit 29 comprises a measuring instrument 30, an interface 31 and a Control unit 32.
- the control unit 32 has a control module 34, for example.
- the measuring unit 29 can furthermore comprise a storage unit 35 and a timer 36.
- the components of the measuring unit 29 form a compact unit.
- the compact unit can be arranged, for example, in a single housing on the movement axis 25 of the machine 22.
- the measuring unit 29 is by means of a
- Signal line 33 connected to control unit 26 of machine 22 via interface 31.
- the measuring unit 29 has a further interface (not shown) in order to connect the measuring unit 22 to the machine 22.
- the measuring unit 29 comprises a touch unit 37.
- the embodiment according to FIG. 1 has such a button unit (not shown.)
- control module 34 control module
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019122651.1A DE102019122651A1 (en) | 2019-08-22 | 2019-08-22 | Measuring unit |
PCT/EP2020/071667 WO2021032444A1 (en) | 2019-08-22 | 2020-07-31 | Measuring unit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4018153A1 true EP4018153A1 (en) | 2022-06-29 |
Family
ID=71948566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20751109.8A Pending EP4018153A1 (en) | 2019-08-22 | 2020-07-31 | Measuring unit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4018153A1 (en) |
DE (1) | DE102019122651A1 (en) |
WO (1) | WO2021032444A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9305687D0 (en) * | 1993-03-19 | 1993-05-05 | Renishaw Metrology Ltd | A signal processing for trigger probe |
DE10258579B4 (en) * | 2002-12-16 | 2007-12-13 | Carl Mahr Holding Gmbh | measuring device |
DE102006007074A1 (en) * | 2006-02-15 | 2007-08-16 | Siemens Ag | Proximity sensor |
DE102007003891A1 (en) * | 2007-01-19 | 2008-07-31 | Herbert Arnold Gmbh & Co. Kg | Workpiece contour e.g. chamfer, processing method, involves automatically determining processing parameters based on geometrical data, and implementing processing cycle for processing workpiece contour using processing parameters |
DE102010040195A1 (en) * | 2009-10-28 | 2011-05-05 | Dr. Johannes Heidenhain Gmbh | Touch probe and method for operating a touch probe |
DE102012022116A1 (en) * | 2012-11-13 | 2014-05-15 | M & H Inprocess Messtechnik Gmbh | Measuring device for a machine tool |
US9250214B2 (en) * | 2013-03-12 | 2016-02-02 | Hexagon Metrology, Inc. | CMM with flaw detection system |
-
2019
- 2019-08-22 DE DE102019122651.1A patent/DE102019122651A1/en active Pending
-
2020
- 2020-07-31 WO PCT/EP2020/071667 patent/WO2021032444A1/en active Search and Examination
- 2020-07-31 EP EP20751109.8A patent/EP4018153A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102019122651A1 (en) | 2021-02-25 |
WO2021032444A1 (en) | 2021-02-25 |
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Legal Events
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DAX | Request for extension of the european patent (deleted) | ||
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Owner name: HEXAGON METROLOGY GMBH |
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17Q | First examination report despatched |
Effective date: 20240508 |