Method for measuring fine particulates and fine particulate sensor for determining the particle size of fine particulates
First Claim
1. A method for measuring fine particulates in the vicinity of a motor vehicle with an optical receiving device,whereinat least one LED arranged inside the motor vehicle lights up an outside air region through a windscreen of the motor vehicle,the optical receiving device is designed to capture the area under examination in a spatially localised manner and takes an intensity measurement in an area that is lit by the LED,the intensities measured are analysed for diffraction patterns that depend on the size of the fine particulates,the radiation emitted by the at least one LED is reflected at least in part by the windscreen, andthe light reflected by the windscreen is received and analysed for wetting of the windscreen by water droplets.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method for measuring fine particulates in the vicinity of a motor vehicle with an optical receiving device, at least one LED (2, 3) arranged inside the motor vehicle lights up an outside air region. The optical receiving device is designed to capture the area under examination in a spatially localized manner and takes an intensity measurement in an area that is lit by the LED. The intensities measured are analyzed for diffraction patterns that depend on the size of the fine particulates. Additionally, a portion of the light that is coupled into the windshield is also analyzed for the presence of water on the windshield.
9 Citations
14 Claims
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1. A method for measuring fine particulates in the vicinity of a motor vehicle with an optical receiving device,
wherein at least one LED arranged inside the motor vehicle lights up an outside air region through a windscreen of the motor vehicle, the optical receiving device is designed to capture the area under examination in a spatially localised manner and takes an intensity measurement in an area that is lit by the LED, the intensities measured are analysed for diffraction patterns that depend on the size of the fine particulates, the radiation emitted by the at least one LED is reflected at least in part by the windscreen, and the light reflected by the windscreen is received and analysed for wetting of the windscreen by water droplets.
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9. A fine particulate sensor for a motor vehicle having an optical receiving device,
wherein the fine particulate sensor comprises at least one LED which lights up an area of outside air, the optical receiving device is designed to capture an area that is lit by the LED in spatially localised manner, the fine particulate sensor comprises an analysis device for analysing the diffraction patterns recorded by the optical receiving device, and the fine particulate sensor is integrated in a rain-light sensor.
Specification