Vaisala Oyj

Jenoptik Aktiengesellschaft

Vaisala Impulsphysik Gmbh

Klaus Heyn

Jan Lönnqvist

Jukka Kallio

Stefan Engel

An example forward scatter sensor comprises: a transmitter arranged to emit a single light sheet; a receiver to observe light scattered from particles that fall through a measurement volume; and a control entity comprising an analyzer arranged to record a measurement signal descriptive of intensity of light captured by the receiver as a function of time and to carry out a precipitation analysis on basis of a time segment of the measurement signal, the precipitation analysis comprising: identifying, in said time segment, one or more double peaks that each represent a respective droplet and comprise a first peak that represents light refracted from a bottom of the respective droplet upon entry to the measurement volume and a second peak that represents light reflected from a top of the respective droplet upon exit from the measurement volume; and deriving one or more precipitation parameters and one or more precipitation indications.

Forward scatter sensor

The invention is directed to a method and a combined visibility measuring and precipitation measuring instrument for determining visibility, amount of precipitation and type of precipitation.

Method for determining visibility, amount of precipitation and type of precipitation

The present invention is directed to an optical range measurement device which is able to compensate for lens contamination. The optical range measurement device includes one or more windows having at least two sections positioned at an angle to one another, a transmitter for producing a main beam and transmitting the main beam into the atmosphere, and a receiver for receiving the main beam back scattered by the atmosphere. The device also includes a transmitter producing a reference beam which illuminates the at least two sections and a receiver for receiving the reference beam.

Growing community of inventors

Hamburg, Germany

Klaus Heyn