WO2011069721A1 - Dispositif de surveillance d'une machine-outil - Google Patents

Dispositif de surveillance d'une machine-outil Download PDF

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Publication number
WO2011069721A1
WO2011069721A1 PCT/EP2010/065381 EP2010065381W WO2011069721A1 WO 2011069721 A1 WO2011069721 A1 WO 2011069721A1 EP 2010065381 W EP2010065381 W EP 2010065381W WO 2011069721 A1 WO2011069721 A1 WO 2011069721A1
Authority
WO
WIPO (PCT)
Prior art keywords
monitoring device
marking
hand
electromagnetic radiation
machine tool
Prior art date
Application number
PCT/EP2010/065381
Other languages
German (de)
English (en)
Inventor
Sebastian Jackisch
Tobias Seemann
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP10768743A priority Critical patent/EP2509743A1/fr
Priority to US13/511,975 priority patent/US20130187026A1/en
Priority to CN2010800558094A priority patent/CN102652048A/zh
Publication of WO2011069721A1 publication Critical patent/WO2011069721A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/147—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using electro-magnetic technology, e.g. tags or radar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0082—Safety devices protecting the operator, e.g. against accident or noise by determining whether the operator is in a dangerous position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/06—Safety devices for circular cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B23Q17/2433—Detection of presence or absence
    • B23Q17/2438—Detection of presence or absence of an operator or a part thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/142—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using image capturing devices

Definitions

  • the invention is based on a monitoring device of a machine tool according to the preamble of claim 1.
  • Document DE 10 2008 003 606 A1 discloses a monitoring device of a machine tool having a detection unit for detecting the presence of a type of material in a machine tool working area, wherein the presence detection is based on a spectral evaluation of a radiation and sensitivity ranges for detecting the radiation are arranged in a plurality of different wavelength ranges of the electromagnetic spectrum are. Disclosure of the invention
  • the invention relates to a monitoring device of a machine tool with a recognition device, which is provided for a presence detection of a type of material in a machine tool working area.
  • a "machine tool working area” is to be understood as meaning, in particular, an area of a machine tool in the immediate vicinity of a tool.
  • a region in the "direct” vicinity of the tool is to be understood as meaning a region in which each point of the area has a smallest distance to the tool which is at most 10 cm, preferably at most 5 cm and more preferably at most 2 cm.
  • the monitoring device comprises at least one hand-marking unit, which has at least one specially designed for detection by the recognition system.
  • Device has matched marking element, for marking a hand of an operator includes.
  • marking element of the hand-marking unit has a specially selected and / or adapted feature, which in an environment of the machine tool only has a negligibly small
  • Probability can occur or can be found and to which the recognition device reacts in a specific way. As a result, recognition of a hand of an operator without visible skin areas can advantageously be made possible.
  • the hand-marking unit may be a glove having on its outside a specific, evenly distributed color.
  • the detection device could then include a camera whose lens is equipped with an interference filter whose transmission maximum is within an electromagnetic radiation which is reflected by the color of the glove from the daylight, so that in a suitable embodiment the operator for protection against cold and / or or rough surfaces of a work piece can use gloves and at the same time by the monitoring device operator safety exists.
  • a detection of the hand of the operator of the machine tool at the entry into the machine tool working area can be made possible, even if the operator for protection against cold or mechanical injury wearing gloves and a skin of the operator's hand is covered to the outside, so that even in such Operating situation an operator safety can be guaranteed.
  • the recognition device could be an RFID (Radio
  • the glove could include a passive transponder for absorbing the UHF radio waves emitted by the reader, and the frequencies of the reader and the frequency of the passive transponder could be matched.
  • the at least one marking element and the recognition device are specially matched with respect to an optical interaction.
  • the term "optical interaction" should each of which mutually influencing effect of electromagnetic radiation in an optical wavelength range of the electromagnetic spectrum and material objects are understood and in particular a directional reflection and a non-directional (diffuse) reflection or remission, transmission and absorption with and without subsequent emission of electromagnetic radiation
  • an "optical wavelength range” should be understood in particular to be the wavelength range of the visible light (VIS), the wavelength range of the UV light and the wavelength range of the near infrared radiation (NIR) In this context, in particular light from a part of the electromagnetic spectrum with wavelengths between 380 nm and 780 nm are understood.
  • NIR near infrared radiation
  • Wavelengths between 1 nm and 380 nm and in particular between 200 nm and 380 nm are understood.
  • Such a monitoring device can react particularly quickly with a suitable embodiment and have a low false alarm rate.
  • it can be easily tuned by adapting light sources, optical filters and optical sensors.
  • the recognition device is provided for the presence recognition of the at least one manual marking unit in a machine tool working area by means of the spectral evaluation of an electromagnetic radiation and has at least one first detector element which is provided to detect the electromagnetic radiation for presence detection.
  • the at least one detector element has a sensitivity range for electromagnetic radiation which extends from the UV range to the NIR range. With the detector element, a simple detection of the presence of the marking element due to different interactions with the electromagnetic radiation of the UV range can be achieved.
  • a "sensitivity range of the detector element” should be understood to mean, in particular, a wavelength range of the electromagnetic radiation which comprises the wavelengths of that radiation which generate in the detector element a signal amplitude which amounts to at least one percent of a signal amplitude which is one electromagnetic radiation with one wavelength generated in the detector element, for which the detector element has a maximum sensitivity.
  • the detection device has an emission unit with at least one region of emission of electromagnetic radiation, which is arranged at least partially in a UV region of the electromagnetic spectrum, and which is provided with at least one hand-marking unit for presence detection, in at least one operating mode to interact selectively with the electromagnetic radiation of the UV range.
  • the at least one manual marking unit with a recognition device interacts selectively with an existing UV-area radiation machine on an already existing machine tool for presence detection, which is emitted by an emission unit of the recognition device.
  • the existing monitoring device of the machine tool can be brought to an improved technical level with a small additional effort, in addition to detecting the skin of the operator and a use of gloves to protect against cold or mechanical injury while ensuring Operator safety allowed.
  • the at least one manual marking unit for marking a hand of an operator of the machine tool for presence detection has an albedo of more than 0.10 in at least part of the UV range of the electromagnetic spectrum.
  • an "albedo” is to be understood as meaning, in particular, a ratio of a diffusely reflected light intensity to an irradiated light intensity Hand marking unit in the machine tool work area increase, whereby a simple and secure presence detection can be achieved.
  • the at least one marking element for marking the hand of the operator of the machine tool for presence detection in at least part of the UV region of the electromagnetic spectrum has a reflectance of the electromagnetic radiation which is greater than an absorption degree in the part of the UV region of the electromagnetic Spectrum, a detection of the presence of the operator's hand in the machine tool work area can be achieved particularly easily.
  • the at least one marking element for marking the hand of the operator for presence detection has at least one photoluminescent property.
  • a "photoluminescent property” should be understood in particular to mean that the marking element is excited by interaction with the electromagnetic radiation of the UV region emitted by the emission unit to a subsequent emission of electromagnetic radiation having a different, generally longer wavelength
  • the photoluminescent property may comprise a fluorescence property or a phosphorescence property.
  • the signal amplitude of the detector element can thereby be increased by an additionally in a region of the visible light when the hand-marking unit enters the machine-tool working area (visual inspection).
  • rich, VIS of the electromagnetic spectrum increase, whereby a particularly simple and secure presence detection can be achieved.
  • An advantageously high signal-to-noise ratio of the signal amplitude of the detector element when the hand-marking unit enters the machine tool working area can be achieved if the at least one emission unit is intended to emit an amplitude-modulated electromagnetic radiation.
  • amplitude-modulated electromagnetic radiation is to be understood in particular as meaning that an intensity of the electromagnetic radiation varies over time and, in particular, that it varies with a temporal periodicity Filtering measures applied to the detector element, an electromagnetic background radiation not correlated with the electromagnetic radiation of the emission unit can be advantageously eliminated.
  • the monitoring device comprises a second detector element, which has a sensitivity range for electromagnetic radiation which is different from the sensitivity range of the first detector element.
  • Signal amplitude of the first detector element is substantially determined by the electromagnetic radiation, which is induced by the electromagnetic radiation emitted by the emission unit of the UV range.
  • the signal amplitude of the second detector element can then be determined essentially by the electromagnetic radiation of the UV range of the emission unit which is reflected by the hand-marking unit.
  • "Substantially” is to be understood in this context as being particularly preferably more than 50%, particularly preferably more than 70%, Such a division into separate signal components enables a particularly reliable detection of the presence of the manual marking unit in the machine tool working range ,
  • the at least one manual marking unit is designed as a glove whose outer Surface has a photoluminescent dye, whereby a simple and inexpensive solution for presence detection can be provided, in which a protection of the hand of the operator by the monitoring device and at the same time protection against cold and / or rough surfaces of the workpiece can be achieved.
  • the dye has fluorescence properties.
  • the recognition device has an evaluation unit which is provided to carry out the presence detection of the at least one manual marking unit on the basis of a mathematical ratio of at least two radiation characteristics associated with different regions of the electromagnetic spectrum.
  • Preferred ranges of the electromagnetic spectrum are the UV range, in particular the UV-A range, and the range of the visible light (VIS). This allows a particularly reliable presence detection can be achieved with a small number of false alarms.
  • the evaluation unit is provided to provide a signal due to the presence detection of the at least one manual marking unit, which at least initiates triggering of a protection system of the machine tool.
  • FIG. 1 is a side view of a trained as a table saw machine tool with a monitoring device
  • FIG. 2 shows the table saw according to FIG. 1 in a plan view with a reaction region of the recognition device
  • FIG. 3 shows a schematic diagram of the monitoring device of the machine tool according to FIG. 1 in a detailed view
  • FIG. 4 shows an embodiment of the monitoring device of the machine tool according to FIG. 1,
  • FIG. 5 is a schematic representation of signal amplitudes of the detector element of the monitoring device according to FIG. 3, FIG.
  • FIG. 6 shows another embodiment of a monitoring device
  • FIG. 7 shows a schematic illustration of signal amplitudes of the detector element of the monitoring device according to FIG. 5, FIG.
  • FIG. 8 shows a further embodiment of a monitoring device
  • FIGS. 9 is a schematic representation of sensitivity ranges and signal amplitudes of two detector elements of the monitoring device according to FIGS. 7 and
  • FIG. 1 shows a machine tool 10 designed as a table saw in a side view.
  • the machine tool 10 has a tool 12 configured as a disk-shaped saw blade, which is rotationally driven in a sawing operation by means of a drive unit 16 arranged in a drive housing 14 and designed as an electric motor.
  • a drive unit 16 arranged in a drive housing 14 and designed as an electric motor.
  • Supported on the drive housing 14 is a saw table 26 for supporting a workpiece 28 to be machined.
  • the machine tool 10 comprises a protective cover 32 of a known type, which completely surrounds the protruding from the saw table 26 part of the tool 12 in an idle state of the machine tool. To carry out a machining of the workpiece 28, this is displaced by the operator in a working direction 30 directed towards the tool 12.
  • the guard 32 which is rotatably mounted about a rotation axis 34, pivoted by the workpiece 28 upwards, whereby the tool cutting edge is released.
  • the machine tool 10 is equipped with a monitoring device.
  • the monitoring device has a recognition device 24, which is provided for detecting the presence of a type of material in a machine tool working region 36 of the machine tool 10.
  • the machine tool working area 36 is shown in FIG. 2 in a plan view of the machine tool 10. For the sake of clarity, the presentation of the
  • the recognition device 24 has a reaction region 38 which is associated with an actuation of an actuator unit 18 coupled to the drive unit 16 (FIG. 1), which is in operative connection with the recognition device 24.
  • an actuator unit 18 coupled to the drive unit 16 (FIG. 1), which is in operative connection with the recognition device 24.
  • a protective system of the machine tool is activated in a known manner and the tool 12 is stopped by the drive unit 16, whereby a potential injury to the operator by the tool 12 is avoided.
  • the operator wears gloves for mechanical protection of the hand and protection against cold.
  • the gloves also form a hand marking unit 40 for marking the operator's hand such that presence of one of the gloves marks and implies the simultaneous presence of the operator's hand.
  • the hand-marking unit 40 formed by the glove has a marking element 42 specially matched to recognition by the recognition device, namely the marking element 42 and the recognition device 24 are coordinated with respect to an optical interaction, as will be explained below.
  • the recognition device 24 can also be arranged on a splitting wedge, on a rip fence and / or on a delivery arm above the saw table.
  • the detection device 24 comprises an emission unit 44 having a region of emission of electromagnetic radiation S 1, which is arranged in the UV-A region of the electromagnetic spectrum with wavelengths between 315 nm and 380 nm.
  • the emission unit 44 is intended to emit an amplitude-modulated with a modulation frequency f mod1 of 15 kHz electromagnetic radiation S, in the UV-A range, with an amplitude maximum at a wavelength of 375 nm.
  • the hand-marking unit 40 is provided for presence detection to selectively interact in at least one operating mode with the electromagnetic radiation S, the UV-A region.
  • the electromagnetic radiation S, emitted by the emission unit 44, in the UV region is directed to the reaction region 38, which corresponds to a partial region of the machine tool working region 36 and is arranged in front of the tool 12 in the working direction 30 (FIG. 2).
  • the recognition device 24 is provided for detecting the presence of the hand-marking unit 40 in the reaction region 38 by means of the spectral evaluation of an electromagnetic radiation S r and for this purpose comprises a detector element 48 formed by an InGaAs detector which is provided to detect the electromagnetic radiation S r for presence detection.
  • the electromagnetic radiation S r of the UV region which is directed by materials in the reaction region 38 of the recognition device 24 or diffusely reflected in the direction of the detector element 48 generates an electrical signal in the detector element 48 which is fed to an input of an evaluation unit 20 of the recognition device 24.
  • the signal generated in the detector element 48 is substantially proportional to an integrated over the entire sensitivity range intensity I of the radiation S r .
  • the evaluation unit 20 of the recognition device 24 is also provided to provide a signal 22 due to the presence detection of the at least one manual marking unit 40, which at least initiates triggering of the actuator unit 18 of the machine tool 10 (FIG. 1) coupled to the drive unit 16.
  • FIGS. 4, 6 and 8 show alternative embodiments of monitoring devices which are intended for use with the previously described machine tool 10 and the components common to all exemplary embodiments. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the
  • the embodiment of the monitoring device shown in FIG. 4 has, in addition to the emission unit 44a, a second emission unit 46a.
  • the second emission unit 46a is intended to emit an amplitude-modulated electromagnetic radiation S with a modulation frequency f mod2 of 35 kHz, in the wavelength range of visible light (VIS), with an amplitude maximum at a wavelength ⁇ of 740 nm.
  • the detector element 48a has an electromagnetic radiation sensitivity range extending from the UV region to a near infrared region.
  • the hand-marking unit 40a formed by the glove is made of a material which has a comparatively high Aldo of 0.12 for electromagnetic radiation of the UV range and an absorbance of 0.95 for electromagnetic radiation with a wavelength ⁇ of 740 nm.
  • FIG. 5 shows the filtered at the respective modulation frequencies f mod1 , f mod2 of the two emission units 44a, 46a in a known manner with electronic bandpass filters
  • Signal amplitudes of the detector element 48a Each amplitude is proportional to an intensity I of the electromagnetic radiation S, emitted at the fixed modulation frequency f mod1 , f m0 d2.
  • the hand-marking unit 40a is outside the reaction area 38a.
  • the right-hand diagram of Fig. 5 qualitatively shows a change in the amplitudes by the hand-marking unit 40a having entered the reaction area 38a.
  • Evaluation unit 20a is provided for carrying out the presence recognition of hand-marking unit 40a on the basis of a computational ratio of two radiation parameters formed by the two amplitudes, namely intensities I, the different regions of the electromagnetic spectrum, namely the UV region and the VIS Area, are assigned.
  • the evaluation unit 20a is further provided to compare the computational relationship of the two radiation characteristics with threshold values which are stored in an access area of the evaluation unit 20a in a memory element, and when the threshold value for presence detection is exceeded, to provide a signal 22a triggering the coupled with the drive unit 16 Aktorikiki 18 of the machine tool 10 at least initiated.
  • a recognition device 24b comprises an emission unit 44b, which is constructed identically with the emission unit 44 according to FIG. 3 and is also provided with an electromagnetic radiation S, amplitude-modulated with a modulation frequency f mod1 of 15 kHz, in the UV-A region an amplitude maximum at a
  • a detector element 48b has an electromagnetic radiation sensitivity range extending from the UV region to a near infrared region (NIR).
  • a hand marking unit 40b formed by the glove has a mark member 42b for marking the hand of the presence recognition operator having a photoluminescence property.
  • the glove is made of a material whose outer surface comprises the fluorescent dye rhodamine G, which forms a marking element 42b formed by the electromagnetic radiation S, from the UV region for the spontaneous emission of electromagnetic radiation S f in the region of visible light ( VIS) is excited (Fig. 10).
  • the emission of visible light occurs after a very short time compared to a period length of the modulation frequency f mod1 after excitation, so that the emission of visible light can be considered as non-time-shifted for practical considerations and a modular tion frequency of the visible light of the modulation frequency f mod1 of the exciting UV light, substantially without a broadening of a frequency response corresponds.
  • FIG. 7 shows signal diagrams which qualitatively describe a respective situation in which the hand-marking unit 40b formed by the glove is located outside (left-hand diagrams) or inside (right-hand diagrams) of the reaction region 38b.
  • the two upper diagrams show an intensity I of the radiation S r , S f as a function of a wavelength ⁇ of the electromagnetic radiation S r , S f .
  • the right diagram shows one with the glove in the reaction region 38b the fluorescence properties of the dye of this with the modulation frequency f mod1 emitted electromagnetic radiation S f in the visible light range (VIS).
  • the signal amplitude generated in the detector element 48b and filtered in a known manner with an electronic bandpass filter is proportional to an intensity I of the radiation S r , S f integrated over the entire sensitivity range.
  • the fluorescent dye rhodamine G has a reflectance which, upon excitation with the electromagnetic radiation S, of the UV region can reach values of more than 200%, so that the signal amplitude increases when the glove enters the reaction region 38b.
  • the evaluation unit 20b is provided to compare the signal amplitude of the detector element 48b with a threshold value which is stored in an access area of the evaluation unit 20b in a memory element, and if the threshold value for indicating the presence detection is exceeded, to provide a signal 22b triggering the signal at least initiated with the drive unit 16 Aktorikiki 18 of the machine tool 10.
  • a recognition device 24c comprises an emission unit 44c, which is identical in construction to the emission unit 44 according to the recognition device 24 of FIG. 3 and is also provided for emitting an electromagnetic radiation S, amplitude-modulated with a modulation frequency f mod1 of 15 kHz, in the UV-A range, with a Amplitude maximum at a wavelength ⁇ of 375 nm to emit.
  • an electromagnetic radiation S amplitude-modulated with a modulation frequency f mod1 of 15 kHz, in the UV-A range, with a Amplitude maximum at a wavelength ⁇ of 375 nm to emit.
  • the recognition device 24c has two detector elements 48c, 50c, namely a first detector element 48c with a sensitivity range for electromagnetic radiation in the UV range between 200 nm and 380 nm and a second detector element 50c, which has a sensitivity range for electromagnetic radiation which is different from the sensitivity range of the first detector element 48c and extends from the range of the visible light (VIS) to the range of the near infrared (NIR).
  • VIS visible light
  • NIR near infrared
  • a hand-marking unit 40c formed by a glove has, as a marking element 42c for marking a hand of an operator for presence detection, the fluorescent dye rhodamine G in an outer surface of the glove having the fluorescence characteristics according to the embodiment of FIG.
  • FIG. 9 shows sensitivities E of the two detector elements 48c, 50c in the left-hand part.
  • the middle part or right part of FIG. 9 shows signal diagrams of the two detector elements 48c, 50c, which qualitatively each describe a situation in which the hand-marking unit 40c formed by the glove is outside (middle diagrams) or inside (right-hand diagrams) ) of reaction area 38c.
  • the two middle diagrams of FIG. 9 show signal amplitudes produced in the detector elements 48c, 50c and filtered in a known manner with an electronic bandpass filter.
  • the first detector element 48c detects a remitted radiation S r in the UV region.
  • the second detector element 50c shows no signal at the modulation frequency f mod i of the emission unit 44c.
  • the two right hand diagrams qualitatively describe the situation when the glove is in the reaction zone 38c.
  • the signal amplitude of the first detector element 48c is reduced by the electromagnetic radiation absorbed by the fluorescent dye in the UV range, while the signal amplitude of the second detector element 50c is reduced by one of the fluorescent dye spontaneously emitted electromagnetic radiation S f increases significantly in the visible light range.
  • Evaluation unit 20c is provided for carrying out the presence detection of hand-marking unit 40c on the basis of a mathematical ratio of two radiation parameters formed by the two amplitudes, namely intensities I, the different regions of the electromagnetic spectrum, namely the UV region and the VIS region, assigned.
  • the evaluation unit 20c is further provided for comparing the computational relationship of the two radiation characteristics with threshold values which are stored in an access area of the evaluation unit 20c in a memory element, and when the threshold for indicating presence detection is exceeded, providing a signal 22c which triggers the coupled with the drive unit 16 Aktorikiki 18 of the machine tool 10 at least initiated.
  • an absorption spectrum and below an emission spectrum of the fluorescent dye rhodamine 6G are shown at the top. It can be seen that an electromagnetic radiation S, in the UV range, for example, at the wavelength ⁇ emitted by the emission unit 44 of 375 nm, are absorbed by the fluorescent dye rhodamine 6G and due to its fluorescence property spontaneously electromagnetic radiation S f in the range of visible light can be emitted from a wavelength ⁇ of about 500 nm (blue-green).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un dispositif de surveillance d'une machine-outil (10) muni d'un dispositif d'identification (24) réalisé pour détecter la présence d'un type de matériau dans une zone de travail de la machine-outil (36). Selon l'invention, le dispositif de surveillance présente au moins une unité de marquage de main (40) munie d'au moins un élément de marquage (42) réglé spécialement en fonction d'une identification réalisée par le dispositif d'identification (24), afin de marquer une main d'un utilisateur.
PCT/EP2010/065381 2009-12-10 2010-10-14 Dispositif de surveillance d'une machine-outil WO2011069721A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10768743A EP2509743A1 (fr) 2009-12-10 2010-10-14 Dispositif de surveillance d'une machine-outil
US13/511,975 US20130187026A1 (en) 2009-12-10 2010-10-14 Monitoring Device of a Machine Tool
CN2010800558094A CN102652048A (zh) 2009-12-10 2010-10-14 工具机的监控装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009054491.7 2009-12-10
DE102009054491A DE102009054491A1 (de) 2009-12-10 2009-12-10 Überwachungsvorrichtung einer Werkzeugmaschine

Publications (1)

Publication Number Publication Date
WO2011069721A1 true WO2011069721A1 (fr) 2011-06-16

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PCT/EP2010/065381 WO2011069721A1 (fr) 2009-12-10 2010-10-14 Dispositif de surveillance d'une machine-outil

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EP2509743A1 (fr) 2012-10-17
DE102009054491A1 (de) 2011-06-16
CN102652048A (zh) 2012-08-29
US20130187026A1 (en) 2013-07-25

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