Abstract: In a method for detecting the wear of wearing tires of a vehicle, wherein the tires consist of an elastic material, signals are emitted by signal generators introduced into the tires, wherein only signal generators located on the tire surface emit a signal. The emitted signal is received by a sensor arranged in the vehicle, and information processed from the received signal is made available to the driver of the vehicle. Enhanced, in particular automatic measurement of the tire tread is enabled by means of such a method.

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.

Abstract: A sensor device for detecting moisture on a windscreen has a transmitter and a receiver and optics arranged between the transmitter and the receiver. The optics have an upper plane for connection to a windscreen, a decoupling region serving to decouple the electromagnetic rays from the optics into the windscreen, and a coupling region serving to couple the electromagnetic radiation from the windscreen into the optics, and which even for a small construction shall supply a usable signal. The decoupling region has at least one surface inclined relative to the upper plane of the optics.

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 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. Additionally, a portion of the light that is coupled into the windshield is also analysed for the presence of water on the windshield.

Abstract: In a method for detecting the wear of wearing tires of a vehicle, wherein the tires consist of an elastic material, signals are emitted by signal generators introduced into the tires, wherein only signal generators (6, 7, 8, 10) located on the tire surface emit a signal. The emitted signal is received by a sensor arranged in the vehicle, and information processed from the received signal is made available to the driver of the vehicle. Enhanced, in particular automatic measurement of the tire tread is enabled by means of such a method.

Abstract: A method for detecting a degree of wetting of a glass pane, in particular a windscreen of a motor vehicle, is provided. A transmitter is arranged on the inside relative to a glass pane and emits electromagnetic waves, which are reflected according to the total reflection principle on the outer, from the transmitter's point of view the opposite surface of the glass pane, and which are received by a receiver arranged on the inside relative to the glass pane. Electromagnetic waves are emitted further from a transmitter. Waves pass through the glass pane and are scattered on particles or droplets in front of the glass pane and are received by a receiver arranged on the inside relative to the glass pane.

Abstract: A method for detecting a degree of wetting of a glass pane, in particular a windscreen of a motor vehicle, is provided. A transmitter is arranged on the inside relative to a glass pane and emits electromagnetic waves, which are reflected according to the total reflection principle on the outer, from the transmitter's point of view the opposite surface of the glass pane, and which are received by a receiver arranged on the inside relative to the glass pane. Electromagnetic waves are emitted further from a transmitter. Waves pass through the glass pane and are scattered on particles or droplets in front of the glass pane and are received by a receiver arranged on the inside relative to the glass pane.

Abstract: In a method for delivering a warning of a hazardous road surface state for application in a travelling motor vehicle in which the air temperature is measured, a targeted prediction of the road surface state is to be made so that the output of a warning can be avoided in many cases in which such a warning was not objectively justified. This is achieved by means of a contactless measurement method by which means the moisture of the road surface is determined and by means of which the temperature of the road surface is determined where a value describing the road surface state is determined taking into account these three measured values. The warning is then delivered depending on the value describing the road surface state.

Abstract: A sensor device for detecting moisture on a windscreen has a transmitter and a receiver and optics arranged between the transmitter and the receiver. The optics have an upper plane for connection to a windscreen, a decoupling region serving to decouple the electromagnetic rays from the optics into the windscreen, and a coupling region serving to couple the electromagnetic radiation from the windscreen into the optics, and which even for a small construction shall supply a usable signal. The decoupling region has at least one surface inclined relative to the upper plane of the optics.