EP4452524A1 - Verfahren zur herstellung einer abdeckung für ein sensormodul - Google Patents
Verfahren zur herstellung einer abdeckung für ein sensormodulInfo
- Publication number
- EP4452524A1 EP4452524A1 EP22830845.8A EP22830845A EP4452524A1 EP 4452524 A1 EP4452524 A1 EP 4452524A1 EP 22830845 A EP22830845 A EP 22830845A EP 4452524 A1 EP4452524 A1 EP 4452524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- base body
- sensor module
- coating
- sensors
- 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
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
- G01S7/4813—Housing arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
- B05D1/305—Curtain coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C45/0055—Shaping
- B29C2045/0058—Shaping removing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C2045/0079—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping applying a coating or covering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0009—Cutting out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
- G01S2007/4975—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen
- G01S2007/4977—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen including means to prevent or remove the obstruction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9327—Sensor installation details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2015/937—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details
Definitions
- the invention is in the technical field of vehicle sensor technology and relates to a method for producing a cover for a sensor module and in particular for a vehicle sensor module with particularly good optical properties.
- driver assistance systems see for example US 2019/0169068 A1 or US 2021/0384622 A1.
- These include, for example, optical cameras, mid-range and long-range radar systems, ultrasonic sensors, rain sensors, daylight sensors, backlight sensors and light detection and ranging (LiDaR).
- ADAS Advanced Driver Assist Systems
- They are usually used for traffic monitoring and can, for example, recognize street signs or determine the position and speed of objects outside the vehicle, such as other road users or obstacles on the road.
- optical cameras or radar systems are mainly used for this purpose.
- US 2019/0169068 A1 describes a windshield with a camera and a radar system, with an anti-fog film being applied to a small section of the inside of the windshield.
- LiDaR Light Detection and Ranging
- LiDaR systems have proven to be advantageous in this regard, in which the surroundings are scanned point by point using laser pulses with a wavelength in the infrared range and an image of the surroundings is created. The distance to an object is determined by measuring the runtime of the laser pulses emitted by the LiDaR sensor and reflected by the object. Due to the high precision in object detection and the low dependence on light and weather conditions, LiDaR systems are well suited to supplement previous sensor systems. Some vehicles already have several of these systems installed, and it can be assumed that the number will continue to increase.
- the ADAS systems must be protected from environmental influences and a variety of mechanical and climatic loads during ferry operations. It is therefore essential that the corresponding sensors are provided with a cover to protect them from environmental influences, otherwise the systems cannot work properly. Special requirements are placed on the covers with regard to the permeability of electromagnetic waves.
- a cover for a black/white or RGB camera must have the highest possible transmission in the visible light spectrum of -380 - 780nm, whereas a LiDaR cover should have the highest possible transmission in the near infrared range (around 905nm for most LiDaRs). .
- Covers for ADAS systems are known, for example, from WO 2020/148185 A1.
- covers of this type are made from transparent polymer bodies, for example in an injection molding or injection compression molding process.
- the covers are provided, for example, with a scratch-resistant and weather-resistant wear protection paint or an anti-reflective coating.
- Suitable materials for the scratch-resistant coating or the anti-reflection coating are known to those skilled in the art.
- Various methods are also known for producing such coatings on plastic articles. These systems can be applied, for example, using dip methods, spin coating, spray methods or flow coating, preferably using dip or flow coating methods.
- a particularly high optical quality of the cover is necessary. Since typical sensor modules and their covers are very small, a particularly high optical quality over the largest possible area of the cover is desirable.
- a base body also referred to below as gross part
- at least one cover also referred to below as net part
- a coating is then arranged on at least one, preferably precisely one, surface of the base body using a flow coating process.
- the cover is then separated from an inner area of the base body.
- the method according to the invention thus consists of the production of a base body as a gross part with oversize, from which one or more covers (net parts) can be removed from areas that have an optimal optical quality. Specifically, this means that the net parts are milled or cut out of coated bodies or panels, discarding edge areas with any stresses, warpage, skimmed paint spots or greasy edges.
- the cover can have different sizes and shapes; it can preferably be flat/planar, curved in one or two dimensions, or designed as a section of a cylinder.
- the base body or the cover advantageously has a large extent in two directions (length c or a, width d or b), which are much greater than the material thickness D of the cover.
- the surface of the base body thus advantageously refers to the surface of the base body which is spanned by the large dimensions (length, width).
- the inner area of the base body advantageously refers to the surface of the base body which is spanned by the large dimensions (length, width). The inner area of the base body is therefore within this area.
- the material thickness D of the base body is advantageously in the range from 1 mm to 4 mm, preferably 1.5 mm to 3.5 mm.
- the base body is produced in the first method step (step (a)) by an injection molding method or by an injection compression molding method.
- Injection compression molding is a further development of injection molding for the production of highly precise or very large plastic components and is well known to those skilled in the art.
- the plastic melt is injected as a so-called mass cake into the practically pressureless, not completely closed mold.
- the tool is only completely closed during the solidification process.
- the closing pressure that builds up evenly as a result ensures the final shape of the molded part.
- injection compression molding provides molded parts with a very good surface, low mechanical anisotropy and low residual stresses. Furthermore, the clamping force required is reduced, so that larger components can be produced on a given machine or a smaller machine can be used for a given component.
- the base body and thus also the cover consist at least in sections, preferably completely, of a polymer material and preferably of a transparent polymer material.
- the polymer material advantageously contains or consists of polycarbonate (PC), polymethyl methacrylate (PMMA), styrene-acrylonitrile (SAN), polyethylene terephthalate (PET) and/or copolymers or mixtures thereof.
- the polymer material can be colored with special dyes that appear black in the visual spectrum but are transparent in the wavelength range of 905 nm or 1550 nm that is relevant for the LiDaR sensor.
- a base body can also be formed from a number of sections with different polymer materials and, as a result, different physical and, in particular, optical properties.
- the cover is cut out at a distance v from the outer edge of the base body of at least 0.5 cm, preferably at least 1 cm, particularly preferably from 1 cm to 3 cm and in particular from 1 cm to 2 cm becomes.
- Such distances are sufficient to separate an optically valuable area of the base body, so that a cover with particularly good optical properties can be produced can.
- sufficient flooding and dripping areas can be provided, which are later separated in order to prevent paint spreading to the back/inside of the cover or to exclude fat edges.
- the cover is cut out of the base body in the third method step (step (c)), preferably by laser beam cutting or water jet cutting, or sawed out.
- the cover can be removed from the base body by milling.
- the cover is preferably milled out of the base body using a milling head with a C profile. In this way a rounded, aesthetically pleasing edge of the cover can be produced.
- the edge radius R is usually greater than or equal to half the material thickness D of the cover (R>1D).
- a cover is separated from a base body. More than one, particularly preferably two, four, six or eight covers from a single base body are preferred. This reduces losses due to waste.
- a coating is arranged on the base body in the second method step (step (b)).
- the coating advantageously consists of a coating to increase the scratch resistance (anti-scratch coating), an anti-fog coating (anti-fog coating) and/or an anti-reflection coating.
- Coatings to increase scratch resistance consist of a scratch-resistant and weather-resistant wear protection paint, a so-called hard coat, which is intended to protect the cover from environmental influences.
- a scratch-resistant and weather-resistant wear protection paint a so-called hard coat
- Both thermally curing paint systems based on polysiloxanes, UV-curing paint systems based on acrylates or methacrylates, and paint systems based on polyurethanes can be used for this purpose.
- Such coatings can be applied by flow, spray or in-mold coating processes.
- the coating according to the method according to the invention is carried out using a flow coating method, which ensures optimum surface quality.
- a continuous flow of paint is preferably applied to the upper edge of the component (here the base body), with the component being fixed on a holder at a certain angle between 0° and 90° to the horizontal.
- the paint runs over the workpiece surface and forms a paint film there.
- the application is advantageously carried out by a robot with a painting nozzle, which runs a program adapted to the respective workpiece geometry and coats the inside and/or outside of the workpiece. Excess paint drips off the component and is fed back into the paint cycle.
- the formation of the paint film in the flow coating process is primarily driven by gravity.
- the flow dynamics in the flow coating process are maintained over a longer period of time and must be guaranteed to be trouble-free with regard to the component geometry.
- the component must not have any scooping elements or radii that are too small (sharp edges).
- the component edges also represent a critical area with regard to the paint flow in the method according to the invention, in particular in the flooding and dripping area of the component.
- the flooding area is the upper area of the component in relation to its position on the component holder (painting frame), on which the paint flow is applied via a painting nozzle.
- the dripping area is the lower edge of the component over which the paint drips.
- a required layer thickness of the coating often cannot be achieved at the flood edge, or so-called paint curtains form due to an imperfectly designed flood edge.
- So-called fat edges usually form on the drip edge. This is excessive paint build-up with visible beading. Defects can also occur on component edges that are vertical relative to the painting position. Such defects can disrupt or deflect the beam path of the electromagnetic radiation transmitted by the sensor or the environment and thus impair the function of the sensor.
- a net part can only be coated on one side with great difficulty; the The painting robot arm or the painting nozzle would have to be moved along the flow edge of the net part with the greatest precision in order to prevent the paint from spreading to the back/inside.
- This is not possible in practice and it is to be expected that the paint will "spill over" and that numerous paint runs will form on the back/inside, which represent an immediate reason for rejecting the cover.
- a one-sided coating with a scratch-resistant coating may be desirable, since only the surface forming the outside of the cover has to be protected with a scratch-resistant coating.
- the inside (in the installed position, for example in a vehicle) of the cover is usually enclosed; the inside surface may instead have a beneficial anti-reflection (AR) coating to minimize photon loss or transmission reduction.
- AR anti-reflection
- an anti-fog (anti-fog) coating can be placed on the inside surface of the cover, which prevents fogging of the cover on the inside.
- Both thermally curing one- or two-layer systems based on polysiloxanes and UV-curing systems based on acrylates can be used as an anti-scratch coating (hard coat).
- the fully cured lacquer layers typically have a layer thickness of 0.4 ⁇ m to 4.0 ⁇ m for the so-called primer layer, or 2.0 ⁇ m to 15 ⁇ m for the so-called hard coat layer.
- the layer thickness of a UV-curing hard coat usually consists of a single-layer system and is typically from 5.0 ⁇ m to 20.0 ⁇ m.
- 2-component reactive PUR systems with a self-healing effect can also be applied to the cover. Such systems can, for example, be applied using the InMold process and often have a layer thickness of 250 ⁇ m to 1000 ⁇ m.
- the inside and outside of the cover for example made of polycarbonate (PC) each have only one coating selected from an anti-scratch coating, an anti-fog coating or an anti-reflection coating.
- PC polycarbonate
- Another aspect of the invention includes a cover made by the method of the invention.
- the cover according to the invention forms the outer visible surface of a sensor module and in particular a vehicle sensor module and protects both the (optical) sensors such as a camera or LiDaR sensors and also the associated electronics from environmental influences. This includes not only precipitation and wind, but also UV radiation and other disruptive influences.
- the surface of the coating on the base body or the coating-free surface of the base body preferably forms the outer surface of the sensor module.
- the cover according to the invention is transparent to light in the visible range (-380-780 nm). This ensures optimal operation, in particular of a camera or a rain sensor, light sensor, backlight sensor or sensor module working in the visible range. This area is therefore preferably transparent in order not to produce any color changes and color distortions.
- transparent means having a transmission of more than 70%, preferably more than 80%, particularly preferably more than 90% and in particular more than 95%.
- the cover according to the invention is transparent to light with wavelengths in the IR range, and in particular of the LiDaR operating range.
- LiDaR sensors generally operate in a wavelength range of 800-1100nm, specifically around 905nm, which belongs to the near-infrared spectrum.
- Other sensors such as IR-operating rain sensors or distance sensors, also work in the same way in this area.
- cover is opaque or black when viewed from the outside. As a result, light in the visible range for the IR sensor can be masked out, and good operational reliability and accuracy of the IR sensor, in particular the LiDaR sensor, is ensured.
- the cover according to the invention is advantageously dimensioned and positioned in such a way that it covers at least the entire beam path of the sensors.
- the wave front error (wave front error) is less than 75 prad in all see-through zones of the cover (ie in particular also in the corners).
- the wavefront error describes the absolute difference between an averaged transmitted wavefront a receive range minus an average transmitted wavefront through a transmit range: ⁇ TWS RX ) - ⁇ TWS TX ) ⁇ , where TWSR X is the mean transmitted wavefront of the receive aperture and TWSyx is the mean transmitted wavefront of the transmitted beam in the TX region.
- the wave front error thus indicates a measure of the deviation of a specific optic from an ideal one.
- the cover according to the invention can have very different shapes and designs and can even be shaped in such a way that it is integrated into existing add-on parts or replaces them.
- add-on parts are A, B or C pillars or their panels, front panels, radiator grille or radiator panel, spoilers, rear panels or roof panels.
- the cover according to the invention can preferably additionally have a film with a de-icing function.
- Such films with a de-icing function are described, for example, in European patent EP 1438172 B1.
- it is a thin polymer film, for example a polycarbonate film, which carries heating wires.
- the film with the de-icing function can be integrated or applied in or on the cover according to the invention by means of film insert molding (FIM).
- FIM film insert molding
- a further aspect of the invention relates to a sensor module and in particular a vehicle sensor module which has a cover as described above as being according to the invention.
- the sensor module according to the invention comprises at least one optical sensor, preferably an optical camera or a light detection and ranging sensor.
- Another aspect of the invention includes the use of a cover according to the invention or a sensor module according to the invention in an Advanced Driver Assist System, preferably for systems with optical cameras, mid-range and long Range radar systems, ultrasonic sensors, rain sensors, daylight sensors, backlight sensors and/or light detection and ranging sensors.
- an Advanced Driver Assist System preferably for systems with optical cameras, mid-range and long Range radar systems, ultrasonic sensors, rain sensors, daylight sensors, backlight sensors and/or light detection and ranging sensors.
- Fig. 1A is a schematic cross-sectional view of a
- Fig. 1B shows a schematic top view of a base body according to the prior art according to Fig. 1A
- FIG. 1C shows a schematic cross-sectional representation of a cover according to the prior art with paintwork irritations and a so-called fat edge according to FIG. 1B,
- FIG. 2A shows a schematic cross-sectional representation of an exemplary embodiment of the flow coating process according to the invention of a base body according to the invention for producing a cover according to the invention
- FIG. 2B shows a schematic top view of a base body according to the invention for producing a cover according to the invention according to FIG. 2B
- FIG. 3 shows a schematic plan view of a base body according to the invention for the production of six covers according to the invention
- FIG. 4 shows a schematic plan view of a cover according to the invention with an additional heating element and busbars, and
- FIG. 5 shows a schematic representation of the various steps of the method according to the invention for producing a cover according to the invention.
- 1A schematically shows the flow coating process of a base body 3 for producing a cover 1 according to the prior art in a cross-sectional representation.
- the base body 3 consists, for example, of a transparent polymer material produced by means of an injection molding process, for example of polycarbonate.
- the base body 3 can have different sizes and shapes. It can preferably be flat/planar, curved in one or two dimensions, or designed as a section of a cylinder. The representation chosen in the figures as a flat plate is not intended to limit the invention in any way.
- the base body 3 is coated with a coating 5 (coating of paint) with the aid of a painting robot.
- the coating 5 is, for example, an anti-scratch coating.
- the painting robot applies a paint 15 via a painting nozzle on a painting robot arm 14 to form the coating 5 on the upper edge of the base body 3.
- the surface 10 of the base body 3 to be coated has a so-called painting angle a (alpha) of, for example, 45° to the horizontal.
- a large part of the paint 15 flows along the upper side 10 of the base body 3 and forms a coating 5 on the base body 3.
- the flooding area 21 and the dripping area 22 of the paint 15 are shown in FIG. 1A.
- a paint wrap-around 16 on the back is shown, i.e. the paint 15 flows over the upper edge of the base body 3 onto the side facing away from the surface 10 and remains there or drips off there.
- FIG. 1B shows a schematic top view of the surface 10 of a base body 3 which is produced with a coating 5 by the flow coating according to FIG. 1A. 1B also shows the so-called (fan) sprue 13, in which the polymer material is injected into the injection mold. This is usually removed before or after coating using the flow coating process.
- Fig. 1C shows a schematic cross-sectional representation of a cover 1 according to the prior art according to Fig. 1B.
- cover 1 or a base body 3 is shown in FIGS. 1A-C.
- the dimensions of cover 1 here for example a rectangular shape with a length a and a width b) the dimensions of the base body 3.
- Fig. 2A shows a schematic cross-sectional representation of an exemplary embodiment of a flow coating process according to the invention of a base body 3 according to the invention for producing a cover 1 according to the invention.
- FIG. 2B shows a schematic plan view of the surface 10 of a base body 3 according to the invention for producing a cover 1 according to the invention as shown in FIG. 2A.
- a polymer material can be selected for the base body 3 that has high mechanical stability, high impact strength, very good resistance to environmental influences such as UV light and weathering.
- the base body 3 consists here, for example, of a transparent polymer material produced by means of an injection molding process, for example of polycarbonate.
- the base body 3 can also consist of other polymer materials.
- the base body 3 can have several sections with different polymer materials and thus different physical and in particular optical properties.
- the base body 3 can have different sizes and shapes. It can preferably be flat/planar, curved in one or two dimensions, or designed as a section of a cylinder. The representation chosen in the figures as a flat plate is not intended to limit the invention in any way.
- the material strength (thickness) D of the cover 1 is, for example, in the range of 1 to 4 mm, preferably 1.5 to 3.5 mm.
- the base body 3 is coated with a coating 5 (coating of paint) with the aid of a painting robot.
- the coating 5 is, for example, an anti-scratch coating.
- the painting robot uses a painting nozzle on a painting robot arm 14 to apply paint 15 to form the coating 5 on a flooding area 21 on the upper edge of the base body 3.
- the surface 10 of the base body 3 to be coated has a so-called painting angle a (alpha) of 45°, for example opposite the horizontal. Since the flooding area 21 lies on the surface 10 of the base body 3, the entire paint 15 flows along the top side 10 of the base body 3 and forms a coating 5 on the base body 3 occurs according to the state of the art can be avoided.
- FIG. 2B shows a schematic top view of the surface 10 of a base body 3 which is produced with a coating 5 by the flow coating according to FIG. 2A. 2B also shows the so-called (fan) sprue 13, in which the polymer material is injected into the injection mold.
- the base body 3 shown in FIGS. 2A and 2B as gross part (II) has an oversize with dimensions c*d, from which a cover 1 with dimensions a*b can be removed as net part (I).
- the cover 1 is therefore removed from the optically good area 11 of the base body 3 .
- the distance v of the area of the cover 1 to the outer edge of the base body 3 is dimensioned sufficiently to ensure a high optical quality of the cover 1 .
- the cover 1 is separated from the base body 3 by milling. Since the area of the cover 3 is coated with a particularly homogeneous coating 5 without paint defects, thin paint or paintwork irritations 17 and without a greasy edge 18, a cover 1 with particularly good optical properties is created, which satisfies the special requirements of modern driver assistance systems.
- FIG. 3 shows a schematic plan view of the surface 10 of a base body 3 according to the invention for the production of six according to the invention Covers 1.
- FIGS. 2A and 2B show the details of the manufacturing process, so that only the differences are discussed here.
- the base body 3, ie the gross part (III), has the dimensions c*d, which are larger than the area, which here includes, for example, six covers 1 in two columns, each with three rows. By cutting off, six covers 1 with particularly good optical properties can be produced. At the same time, the waste per cover is significantly reduced since the common edge areas are reduced.
- FIG. 4 shows a schematic plan view of a cover 1 according to the invention with an additional heating element.
- the cover 1 has a film, for example a polycarbonate film, on which heating wires 20 and two busbars 19 are arranged, for example.
- the heating wires 20 and the busbars 19 are, for example, first applied to the polycarbonate film and then connected to the base body 3 by film injection molding.
- Fig. 5 shows a schematic representation of the various steps of the method according to the invention for producing a cover according to the invention, wherein
- a base body 3 with larger dimensions than at least one cover 1 is provided,
- a coating 5 is arranged by a flow coating method on at least one, preferably precisely one, surface 10 of the base body 3, and
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21216707 | 2021-12-22 | ||
| PCT/EP2022/084795 WO2023117429A1 (de) | 2021-12-22 | 2022-12-07 | Verfahren zur herstellung einer abdeckung für ein sensormodul |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4452524A1 true EP4452524A1 (de) | 2024-10-30 |
Family
ID=79686831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22830845.8A Pending EP4452524A1 (de) | 2021-12-22 | 2022-12-07 | Verfahren zur herstellung einer abdeckung für ein sensormodul |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250044416A1 (de) |
| EP (1) | EP4452524A1 (de) |
| CN (1) | CN116745102A (de) |
| WO (1) | WO2023117429A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10147537A1 (de) | 2001-09-26 | 2003-04-17 | Freeglass Gmbh & Co Kg | Verfahren zum Herstellen einer Kunststoffscheibe mit einer Leitstruktur und Kunststoffscheibe mit eingebetteten Drähten |
| DE10156699B4 (de) * | 2001-11-17 | 2005-06-09 | Audi Ag | Verfahren zur Herstellung einer beheizbaren Radom-Plakette und Radom-Plakette |
| WO2018021499A1 (ja) * | 2016-07-29 | 2018-02-01 | 日本板硝子株式会社 | ウインドシールド及びウインドシールドの製造方法 |
| KR102744687B1 (ko) * | 2017-12-21 | 2024-12-23 | 코베스트로 도이칠란트 아게 | 다층체 및 LiDAR 센서를 포함하는 장치 |
| US12080942B2 (en) | 2018-10-15 | 2024-09-03 | Motherson Innovations Company Limited | Decorative radome and method of producing the same |
| JP7228047B2 (ja) | 2019-01-15 | 2023-02-22 | サン-ゴバン グラス フランス | 統合されているセンサーモジュールを有している乗物ウインドウ |
-
2022
- 2022-12-07 WO PCT/EP2022/084795 patent/WO2023117429A1/de not_active Ceased
- 2022-12-07 US US18/720,514 patent/US20250044416A1/en active Pending
- 2022-12-07 CN CN202280005763.8A patent/CN116745102A/zh active Pending
- 2022-12-07 EP EP22830845.8A patent/EP4452524A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250044416A1 (en) | 2025-02-06 |
| CN116745102A (zh) | 2023-09-12 |
| WO2023117429A1 (de) | 2023-06-29 |
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