Method for calibrating a rain sensor, computer program product, rain sensor system and vehicle
AssigneeValeo Schalter und Sensoren GmbH
InventorsPlhak Zdenek, Donald Peyrot, Vit Kadubec
Life of this patent
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Abstract
A method for calibrating a rain sensor (3), the rain sensor (3) being configured to measure a quantity of rain on a window (101) of a vehicle (100), the rain sensor (3) including a transmitter (4) and a receiver (5), the transmitter (4) being configured to emit or transmit light to the window (101) and the receiver (5) being configured to receive measurement light that is emitted or transmitted by the transmitter (4) and guided to the receiver (5) by the window (101); the method comprising: varying (S1) an incidence angle (α) of the light emitted or transmitted by the transmitter (4) to the window (101).
Claims11
A method for calibrating a rain sensor the method comprising:
- measuring, by the rain sensor a quantity of rain on a window of a vehicle wherein the rain sensor includes a transmitter and a receiver wherein the transmitter is configured to emit or transmit light to the window and wherein the receiver is configured to receive measurement light that is emitted or transmitted by the transmitter and guided to the receiver by the window and varying an incidence angle of the light emitted or transmitted by the transmitter to the window;
- detecting an intensity of the measurement light received at the receiver;
- and determining an operation incidence angle which is an incidence angle for which the detected intensity of the measurement light received at the receiver is larger than a predetermined threshold and/or is largest;
- and operating the rain sensor at the operation incidence angle to measure the quantity of rain on the window.
A rain sensor system, comprising:
- a rain sensor configured to measure a quantity of rain on a window of a vehicle,
- wherein the rain sensor includes a transmitter and a receiver,
- wherein the transmitter is configured to emit or transmit light to the window and
- wherein the receiver is configured to receive measurement light that is emitted or transmitted by the transmitter and guided to the receiver by the window;
- and
- a calibration unit configured to vary an incidence angle of the light emitted or transmitted by the transmitter to the window.
Dependencies are inferred from the claim text.