Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/84—Systems specially adapted for particular applications
  • G01N21/88—Investigating the presence of flaws or contamination
  • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
  • G01N21/8901—Optical details; Scanning details
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/84—Systems specially adapted for particular applications
  • G01N21/88—Investigating the presence of flaws or contamination
  • G01N21/8806—Specially adapted optical and illumination features
  • G01N2021/8812—Diffuse illumination, e.g. "sky"
  • G01N2021/8816—Diffuse illumination, e.g. "sky" by using multiple sources, e.g. LEDs

Definitions

• the present invention relates to a lighting unit for a device for detecting foreign particles in spinning preparation, wherein the lighting unit has a plurality of light-emitting diodes in at least indirect arrangement on at least one circuit board and is adapted to radiate into an inspection channel of the device, can be passed through the fiber material to be cleaned , and wherein the light-emitting diodes each having an optical body is assigned, which is used for beam shaping of the light emitted by the light emitting diodes. Furthermore, the invention is directed to an optical array with a carrier plate and a plurality of optical bodies for such a lighting unit.
• DE 10 2013 010 468 A1 discloses a device for detection of foreign parts in the spinning preparation with a lighting unit having a plurality of light-emitting diodes in at least indirect arrangement on at least one board and is adapted to irradiate in an inspection channel of the device, through the fiber material to be cleaned can be passed. It is indicated that the individual light-emitting diodes are arranged in a circle with associated optical bodies, furthermore it is disclosed that an individual alignment of the individual light sources on the Inspection location within the inspection channel is desirable. For this purpose, it is described that the LEDs are arranged in segments on a flat surface such as an electronic circuit board.
• the illumination is partially equipped, for example, with Fresnel lenses, which direct the light in the desired direction.
• Fresnel lenses which direct the light in the desired direction.
• holographically imaging directional deflection films can also be used.
• the lighting units necessary for this purpose are equipped with a large number of light-emitting diodes, and, for example, a lighting unit may have some 100 to 1 000 light-emitting diodes, to each of which an optical body must be assigned.
• the light emitting diodes are arranged in segments on preferably a plurality of circuit boards, and the boards are lined up to form a lighting unit with a greater length in a main extension direction.
• each LED is assigned its own optical body, such as a lens body having a reflector shape and in which the LED can radiate via a Einstrahlö réelle.
• the optic body must be mounted with the help of a holder. Consequently, a holder with an optical body must be mounted for each light-emitting diode, for example by means of a gluing process.
• the object of the invention is the development of a lighting unit for a device for foreign parts detection in the spinning preparation, which is simple in construction and in particular has a reduced installation costs.
• the structure of the lighting unit should be developed so that incorrect assembly can be avoided.
• the invention provides that a plurality of optical bodies form an integrally formed optical array, wherein a plurality of optical arrays are arranged in front of the light emitting diodes so that each optical body is associated with a light emitting diode.
• an optically array embodied in one piece comprises a plurality of optic bodies, so that a significantly reduced number of individual parts has to be mounted in order to form the illumination unit.
• this has a carrier plate, with which the plurality of optical body are integrally formed and by means of which the optical body are rigidly interconnected.
• the arrangement of the optical body to each other and in particular in the carrier plate corresponds to the arrangement of the LEDs on the board. If the optical array is arranged above the board, all the optical bodies of the optical array can be assigned to the respective light-emitting diodes on the board with only one assembly step.
• the support plate is preferably formed flat and made in one piece and of the same material with the optic bodies, for example by plastic injection molding.
• the carrier plate forms in particular a plan side, wherein the preferably circular trained radiating surfaces of the optical body are integrated in the plane emitting side of the support plate.
• the overall formed plane surface of the carrier plate may have surface structures in the emission regions of the optical body, so that the plane surface does not have to be understood in the mathematical sense as a completely flat surface.
• the optical bodies can form both lenses and reflectors, and, for example, the optical bodies are funnel-shaped, and the light irradiated into the optical bodies can be at the interface of the Reflect funnel-shaped optical body and leave the optic body over the front radiating surface.
• the optical body is used as a light guide, which also has a beam-forming property.
• the funnel-shaped optical body extend on the back of the support plate out of this and open into a Einstrahlö réelle, which is designed for the irradiation of light via the light-emitting diodes.
• the light emitting diodes can at least partially be seated in the irradiation opening of the respective optical body, so that the light generated by the light emitting diodes can radiate substantially completely into the assigned optical body.
• the optical bodies are accommodated in rows in the carrier plate, with a plurality of optical arrays being arranged adjacent to one another such that the rows of optical bodies continue in adjacent optical arrays.
• the lighting unit has a main extension direction, and with the elongated design of the lighting unit, this can be arranged transversely to the conveying direction of the fiber material flow through the inspection channel.
• the inspection channel is in particular likewise designed with a main extension direction which runs parallel to the main extension direction of the illumination unit.
• the rows may also run in the main extension direction in the case of a plurality of optical arrays arranged next to one another, so that the rows of the optical bodies and thus of the light sources have a length which together corresponds overall to the length of the illumination unit in the main extension direction.
• twelve optical bodies are accommodated in a total of four superimposed rows on a carrier plate, so that a carrier plate for forming an optical array has three optical bodies in a row next to each other, and with four superimposed rows, an optical array comprises by way of example twelve optical bodies on a carrier plate.
• the optical bodies can be offset from one another in the carrier plate.
• the offset of the optic bodies of adjacent, superimposed rows may, for example, correspond to half the coverage of the substantially circular optic bodies, thereby increasing the areal density of the optic bodies in the carrier plate, wherein, according to alternative embodiments of the optic arrays, a different number of optic bodies may also be combined to form an optic array, especially in an alternative embodiment of the division of optical bodies in the rows and the number of rows.
• the carrier plate is planar, and it is particularly provided that the optical body in different rows have a different beam guide shape.
• the optical bodies can have, within a row, an identical beam guiding form. This results in the advantage that in order to form a line focus through the illumination unit, the optic bodies are formed in different superimposed rows parallel to the line focus so that the light emitted by the optic bodies in the different rows falls into the line focus.
• the focus in the sense of the present invention describes any form of increase in intensity without a focus in the optical sense of a light bundling is actually formed.
• the light can leave the respective optic bodies via a radiation cone, but if the optic bodies are shaped such that the center axes of the emission cones fall into a common point within the inspection channel, the inspection point within the inspection channel is particularly strongly illuminated.
• the cameras of the device for foreign part recognition can with their Main observation axis also look through the area of the highest intensity of light.
• the individual optical bodies along a respective row are formed equal to each other, but the optical body in the superimposed rows at least partially different from each other, and it can, for example, two different types of optical bodies may be provided.
• the line focus may be midway between the four rows such that optic bodies in the inner rows immediately above and below the height of the line focus have a first optical configuration, and the optic bodies in the outer, more spaced rows relative to the center line focus have a second one optical design for beam shaping. Due to the non-changing line focus along the main extension direction of the illumination unit, the optic bodies are formed equal to each other within a row. In the case of a plurality of juxtaposed optical arrays, therefore, optical bodies are also lined up, which are equal to one another within a common row.
• the different beam shaping characteristics of the optic bodies can be generated, for example, by a different geometric configuration of the funnel shape of the optic bodies. It is also conceivable, via a surface structuring of the emission side of the optics body, to produce the different emission characteristics of the optic bodies on the plane surface of the carrier plate.
• the invention is further directed to an optical array with a carrier plate, in which a plurality of optical bodies are accommodated, wherein the optical body are designed to focus light in a common focus.
• the optic bodies are accommodated in rows in the carrier plate, the optic bodies having a different beam guidance form in different rows and, in particular, the optic bodies within a row have a beam guidance form which is identical to one another.
• the optical array is formed in one piece, so that the optical body with the support plate are integrally formed and in particular of the same material.
• the optical body can be injection molded together with the carrier plate in a single injection molding process in the plastic.
• the optical array to a plastic which is optically transparent in particular, the optical arrays are made of a polymethyl methacrylate (PMMA).
• PMMA polymethyl methacrylate
• FIG. 1 shows a front view of an optical array with a carrier plate and with a plurality of optical bodies
• FIG. 2 shows a side view of the optical array with exemplarily shown emitted light converging in a focus
• Figure 3 is a perspective view of an optical array of a
• FIG. 4 shows a view of an optical array from a rear side on which the optical bodies extend over the carrier plate
• FIG. 5 shows a partial view of a lighting unit with a plurality of arranged on a cooling and receiving body boards and optical arrays and
• Figure 6 is a cross-sectional view through the lighting unit according to the cross-sectional line A-A.
• FIG. 1 shows an optical array 14, and the optical array 14 has a carrier plate 15 in which, by way of example, twelve optical bodies 12 are accommodated.
• the optic bodies 12 are shown by way of example from a front side, which reproduces the emission side for emitting light from the optics array.
• a plurality of mounting holes 18 are introduced in the support plate 15, the example in the intermediate regions between the optical bodies 12 in the support plate 15th are introduced.
• the embodiment shows a total of six mounting holes 18, through the fasteners, For example, screw elements can be passed to secure the optical array 14 to the spacer bolt.
• FIG. 2 shows a side view of the optical array 14 according to FIG. 1, so that the plan view formed carrier plate 15 is shown in the side view, and on the rear side opposite the radiating side, the plurality of optical body 12 extend.
• Radiation paths assigned by the Optical body 12 can be transmitted through light 13, and the optical body 12 are formed so that each light beam of the light 13 passes through a focus 16.
• the simplified illustration shows a focusing of the light 3, wherein the illustrated rays of the light 13 can only form main axes forming central axes of cone-shaped emitted light through the optical body 12, so that the light emitted by each of the optical body 12 does not focus itself in the focus 16 got to.
• the optical bodies 2 are designed such that the main emission axes of the emitted light 13 pass through the optical body 12 through the focus 1 6.
• the optical body 12 are formed differently depending on the position in the support plate 15 to each other, as shown in more detail in connection with Figures 3 and 4.
• FIGS. 3 and 4 show perspective views of an optical array 14, FIG. 3 showing the optical array 14 from a front emission side, and FIG. 4 showing the optical array 14 from a rear side.
• the views in each case show the carrier plate 15 from the emission side and from the back, and by way of example, twelve optical bodies 12 are present in the carrier plate 15.
• the optical bodies 12 On the back side, the optical bodies 12 have injection openings 21, and if the optical arrays 14 are arranged above the light emitting diodes, then light supplied by the light emitting diode can be radiated into each of the injection openings 21.
• the optical body 12 are solid and thus form a solid material body, so that light is radiated into the dome-shaped recess of the Einstrahlö réelle 21, and on the emission side, the light from the optic bodies 12 on the front plane surface of the support plate 15 emerge again.
• the actual optic body 12 with a funnel shape is formed of solid plastic, in particular PMMA.
• the view also shows the mounting holes 18, which are introduced in the intermediate regions between the optical bodies 12 in the support plate 15.
• the optical arrays have opposite lateral edge regions 19, which are provided with projections 20.
• the projections 20 fit puzzle-like into the recesses of adjacent optical arrays 14 present between the protrusions 20, so that a plurality of optical arrays 14 can be arranged side by side, and the rows 1-IV of the optical bodies 12 can be arranged with the illustrated offset arrangement of the optical bodies 12 between the various rows l-IV from array 14 to array 14.
• the optical bodies 14, which are located in each case a row l-IV, are formed geometrically similar to each other, and the optical body 12 in the various rows I to IV are formed differently from each other.
• the focus 16 to be generated according to FIG. 2 lies with a corresponding distance in front of the optical array 4 with respect to the height approximately in the middle between the rows II and III, so that the optical bodies 12 in the second row II and in the third row III are equal to one another may be formed, and the optical body 2 in the first row I and in the fourth row IV are also formed equal to each other.
• the optical bodies 12 of the rows I and IV are formed differently than the optical bodies of the rows II and III, wherein the geometric difference of the configuration of the optical body 12 is provided so the outer optic bodies 12 in the rows I and IV radiate inwards more strongly than the optic bodies in the rows II and III.
• FIG. 5 shows a partial view of a lighting unit 1 for a device for detection of extraneous parts in spinning preparation, and the lighting unit 1 has a cooling and receiving body 17 as an essential structural component.
• a cooling and receiving body 17 On a front side of the cooling and receiving body 17 several sinkers 11 are arranged next to one another. wherein the arrangement of the boards 1 1 side by side in a main extension direction L of the elongated cooling and receiving body 17 is provided.
• the illumination device 1 is shown only partially for better representation with the cooling and receiving body 7, on which not continuously over the entire skin extension direction L boards 1 1 and optical arrays 14 are arranged with the plurality of optical bodies 12.
• the boards sit directly on 1 1, on which the light-emitting diodes 10 are arranged. The arrangement of the boards is thus carried out such that in the light-emitting diodes 10 generated heat through the cooling and receiving body
• the optical arrays 14 are arranged in front of the circuit boards 11, wherein the planar extent of the boards 1 1 has an approximately same layout as the planar extension of the carrier plates 15.
• the projections 20 in the edge region 19 shown in FIG. 4 are designed such that a plurality of optical arrays 14 can be arranged side by side, and the rows, shown by way of example in Figure 5 with the row I, the optical body 12 continue uninterrupted from the optical array 14 to the optical array 14.
• FIG. 6 shows a cross-sectional view through the illumination unit 1 according to the section line AA from FIG. 5.
• the cooling and receiving body 17 with cooling channels 22 is shown in cross-section, and a coolant can be passed through the cooling channels 22 in order to supply the cooling and receiving body 17 segregated heat removal.
• On the receiving side of the cooling and receiving body 17 is the circuit board 1 1, the flat rests on the receiving body 17 to dissipate introduced into the board 1 1 heat through the operation of the LEDs 10.
• the cross-sectional view further shows spacer bolts 23, which are passed through the circuit board 1 1 and screwed into the cooling and receiving body 17.
• the optical array 14 is screwed by screw elements 24 at the free ends of the spacer bolts 23, so that the individual optical body 12 are arranged in front of the LEDs 10, and so that light of the LEDs 10 can be coupled directly into the optical body 12.
• the cross-sectional view continues to show the one-piece design of the support plate 15 with the optical bodies 12 by means of the continuous hatching.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Biochemistry (AREA)
• General Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

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Citations (10)

Family Cites Families (1)

• 2015
  • 2015-11-03 DE DE102015118788.4A patent/DE102015118788A1/de not_active Withdrawn
• 2016
  • 2016-10-07 WO PCT/EP2016/073974 patent/WO2017076575A1/de unknown
  • 2016-10-07 BR BR112018008723A patent/BR112018008723B8/pt not_active IP Right Cessation
  • 2016-10-07 EP EP16778798.5A patent/EP3371579A1/de not_active Withdrawn
  • 2016-10-07 CN CN201680063103.XA patent/CN108351309A/zh active Pending

Patent Citations (10)

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