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US 12,488,453 B2Granted
System and method to control the quality of a reflector body of a lamp for motor vehicles
AssigneeMarelli Automotive Lighting Italy S.p.A. Con Socio Unico
InventorsSara Paroni, Marco Svettini, Mirco Del Linz, Tommaso Fontanot
Life of this patent
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Abstract
A control system to control the quality of at least one reflector body of a lamp of a motor vehicle, comprising a light source, which is designed to emit a first light beam to irradiate the reflecting surface of the reflector body; an image capturing apparatus, which is arranged so as to capture a series of images) containing the irradiated reflecting surface of the reflector body; a processing device, which is configured so as to process the images), in order to determine the actual reflectance of the reflector body, and so as to determine a quality condition of the reflector body to be validated based on the actual reflectance.
Claims8
A control system (1) to control the quality of a reflector body (P1) of a lamp of a motor vehicle, the control system comprising:
- a validation system (2) to validate the quality of the reflector body comprising:
- at least one first light source (10), which has the same photometric characteristics as the light source to be mounted in the lamp of the motor vehicle and is designed to emit a first predetermined light beam to irradiate the reflecting surface (Pla) of said reflector body (P1),
- an image capturing apparatus (11), which is arranged so as to capture one or more first images (IMG1(i)) containing the irradiated reflecting surface of said reflector body (P1),
- a calibration system (3) comprising:
- (i) a sample reflector body (P2), (ii) at least one second light source (5), which is designed to emit a predetermined light beam (F2) so as to irradiate said sample reflector body (P2), (iii) an image capturing apparatus (6), which is arranged so as to capture one or more second images (IMG2(i)) containing the irradiated reflecting surface (P2a) of said sample reflector body (P2), (iv) a first processing device (7), which is configured so as to process said one or more second images (IMG2(i)) in order to determine said reference reflectance (R2) and said first proportionality parameter (K), to determine a reference luminance (L2) based on said second images (IMG2(i)), to determine said reference reflectance (R2) based on said reference luminance (L2), to carry out a digital removal operation to remove, from said one or more second images (IMG2(i)), a first luminance component (LS2) associated with said second light source (5), so as to determine said reference luminance (L2), and to determine said reference reflectance (R2) through the implementation of a simulation program simulating of the optical behaviour of a virtual three-dimensional model of said sample reflector body (P2) based on said reference luminance (L2) and on the second light beam (F2) emitted by said second light source (5),
- a second processing device (12), which is configured so as to:
- process said one or more first images (IMG1(i)) in order to determine the actual reflectance (R1) of the reflector body (P1),
- determine a quality condition of said reflector body (P1) to be validated based on said actual reflectance (R1),
- wherein said second processing device (12) is configured so as to:
- determine said quality condition of the reflector body (P1) based on a comparison between said actual reflectance (R1) and a reference reflectance (R2),
- store a first proportionality parameter (K),
- determine the actual luminance (L1) of said reflector body (P1) based on the processing of said first images (IMG1(i)),
- determine said actual reflectance (R1) of said reflector body (P1) based on said actual luminance (L1) and on said first proportionality parameter (K).
10 more elements
A control system to control the quality of a reflector body (P1) of a lamp of a motor vehicle, the control system comprising:
- a validation system (2) to validate the quality of the reflector body comprising:
- at least one first light source (10), which has the same photometric characteristics as the light source to be mounted in the lamp of the motor vehicle and is designed to emit a first predetermined light beam to irradiate the reflecting surface (Pla) of said reflector body (P1),
- a calibration system (3) comprising:
- (i) a sample reflector body (P2), (ii) at least one second light source (5), which is designed to emit a predetermined light beam (F2) so as to irradiate said sample reflector body (P2), (iii) an image capturing apparatus (6), which is arranged so as to capture a series of second images (IMG2(i)) containing the irradiated reflecting surface (P2a) of said sample reflector body (P2), (iv) a first processing device (7), which is configured so as to process said one or more second images (IMG2(i)) in order to determine said reference reflectance (R2) and said second proportionality parameter (H), (v) determine a reference light intensity (I2) based on said one or more second images (IMG2(i)), and (vi) determine said reference reflectance (R2) based on said reference light intensity (I2),
- an image capturing apparatus (11), which is arranged so as to capture one or more first images (IMG1(i)) containing the irradiated reflecting surface of said reflector body (P1),
- a second processing device (12), which is configured so as to:
- process said one or more first images (IMG1(i)) in order to determine the actual reflectance (R1) of the reflector body (P1),
- determine a quality condition of said reflector body (P1) to be validated based on said actual reflectance (R1)
- determine said quality condition of the reflector body (P1) based on a comparison between said actual reflectance (R1) and a reference reflectance (R2)
- store a proportionality parameter (H),
- determine the actual light intensity (I1) of said reflector body (P1) based on the processing of said first images (IMG1(i)),
- determine said actual reflectance (R1) of said reflector body (P1) based on said actual light intensity (I1) and on said proportionality parameter (H),
- carry out a digital removal operation to remove, from said one or more first images (IMG1(i)), a first light intensity component (IS1) associated with said first light source (10), so as to determine said actual light intensity (I1)
- carry out a digital removal operation to remove, from said one or more second images (IMG2(i)), a first light intensity component (IS2) associated with said second light source (5), so as to determine said reference light intensity (I2),
- wherein said second processing device (7) is further configured so as to determine said reference reflectance (R2) through the implementation of a simulation program simulating of the optical behaviour of a virtual three-dimensional model of said sample reflector body (P2) based on said reference light intensity (I2) and on the second light beam (F2) emitted by said second light source (5).
12 more elements
A control system (1) to control the quality of a reflector body of a lamp of a motor vehicle, the control system comprising:
- a validation system (2) to validate the quality of the reflector body comprising:
- a sample reflector body (P1);
- at least one first light source (10) mounted inside the sample reflector body (P1), which has the same photometric characteristics as the light source to be mounted in the lamp of the motor vehicle and is designed to emit a first predetermined light beam to irradiate the reflecting surface (Pla) of said reflector body (P1),
- an image capturing apparatus (11), which is arranged so as to capture one or more first images (IMG1(i)) containing the irradiated reflecting surface of said reflector body (P1),
- a processing device (12), which is configured so as to:
- process said one or more first images (IMG1(i)) in order to determine the actual reflectance (R1) of the reflector body (P1),
- determine a quality condition of said reflector body (P1) to be validated based on said actual reflectance (R1).
4 more elements
Dependencies are inferred from the claim text.