Atlas Material Testing Technology Gmbh

Heraeus Xenotest Gmbh

W.c. Heraeus Gmbh

Xenotest Gesellschaft Fur Die Herstellung Von Materialprufgeraten Mbh

Bernd Rudolph

Peter March

Artur Schönlein

Bruno Sebralla

Bernhard Börner

Christian Bernatek

Peter Enders

Jörn Jahnke

Tom Marchese

Klaas Oostlander

Mkrtych Khudaverdyan

Klaus J Dietz

Arthur Schonlein

Uwe Kroenert

Roland Heeger

Jorg Boxhammer

Frank Kellner

Hans J Bossler

An apparatus for artificial weathering or lightfastness testing of samples or for simulating solar radiation, the apparatus comprising a weathering chamber, a UV light source provided in the weathering chamber, and a fluorescent material arranged to be radiated by a UV radiation emitted by the UV light source, the fluorescent material being configured to emit a fluorescent radiation comprising spectral emission characteristics similar to natural solar radiation.

Fluorescent material as a radiation source in an apparatus for artificial weathering

The illumination device comprises a plurality of illumination units (), each illumination unit () comprising a light source () for emitting a radiation beam (A) and at least one laser beam source () for emitting at least one laser beam (A), and a plurality of actuator means (), wherein each actuator means () is connected to an illumination unit () and is adapted to change an orientation of the illumination unit () based on a detected beam direction of the laser beam (A).

Illumination device for a simulation arrangement for motor vehicle accidents

The sensor device () for a device () for weathering or lightfastness testing of samples comprises a sensor housing () which is adapted to be arranged in a weathering chamber () of the device () in the same manner as a sample (), and an air mass sensor () which comprises a sensor element () and is attached to the sensor housing () in such a manner that the sensor element () is adapted to be mounted on the sensor housing () and attached to the sensor housing () such that the sensor element () is exposed in the same manner as a sample () to an air flow prevailing in the weathering chamber ().

Sensor device with an air mass sensor for a weathering device

A lighting device (), comprising a light source (); a power controller () configured to control the supply of electrical power to the light source () such that upon receipt of a start signal, the supplied electrical power is increased from a first value to a second value, the first value being different from zero and the second value being greater than the first value; and an input () for supplying the start signal.

High power exposure for vehicle accident simulation system

The sensor device () has a sensor housing (), to which at least two sensors from a group consisting of a black standard sensor (), a UV radiation sensor (), an air temperature sensor and a humidity sensor are connected.

Sensor arrangement with multiple sensors for weathering apparatus

The apparatus has a weathering chamber, in which at least one sample can be arranged, and at least one radiation source, which are arranged in the weathering chamber, wherein the radiation source is provided with a storage device, on which data relating to the radiation source are stored.

Weathering testing using radiation sources which are identifiable by means of RFID chips

The apparatus for artificially weathering or testing the lightfastness of samples has a weathering chamber, in which at least one sample can be arranged, and a plurality of radiation sources, which are arranged in the weathering chamber and which are operable independently of one another, wherein the apparatus is configured in such a way that the at least one sample is movable on a closed path around the plurality of radiation sources.

Weathering testing having a plurality of radiation sources which are independently operable of one another

In a weathering chamber, a UV radiation device is arranged and at least one sample can be arranged in a sample plane spaced apart from the UV radiation device. The UV radiation device has a plurality of UV light emitting diodes (UV LEDs) containing two or more classes of UV LEDs having different emission bands. The emission bands are chosen in such a way that a spectral distribution with which a specific spectral UV characteristic is approximated can be obtained in the sample plane.

Device for simulating spectral UV characteristic by UV light emitting diodes

A UV light emitting diode (UV-LED) is arranged in a weathering chamber and a UV light receiving diode, which is constructed on the same material basis as the UV LED, is arranged relative to the UV LED in such a way that a portion of the radiation emitted by the UV LED impinges on the UV light receiving diode during the operation of the device.

Detection of emission radiation of UV light emitting diode by structurally identical UV light receiving diode

The radiation power emitted from the UV radiation sources () in a weathering apparatus is controlled such that the radiation power of each of the radiation sources () is measured in a predetermined spectral range of the radiation emitted from the radiation sources, with the spectral range being chosen such that the measured radiation power is representative of the radiation power in the UV, an averaged radiation power is calculated from the measured radiation powers, and the averaged radiation power is used for controlling the electrical power to be supplied to the radiation sources (). In particular, the control process can be carried out in such a way that the same electrical power, within a predetermined tolerance bandwidth, is supplied to each of the radiation sources (), and the averaged radiation power is kept constant over time at a desired nominal value.

Control of the UV radiation sources for a weathering apparatus on the basis of the averaged radiation intensity

The usual xenon radiation source in conventional weathering testers is replaced by UV light-emitting diodes (LEDs) (). These can be used to provide a good approximation of the UV component of the solar spectrum, in particular when different types of UV light-emitting diodes () with different emission characteristics are employed. Optionally, further light-emitting diodes in the visible spectral range may also be used in order to cover other parts of the solar spectrum. The light-emitting diodes () may be mounted on a flexible printed circuit board (), which may in turn be fitted on a tubular holding body (). The flexible printed circuit board carrying the light-emitting diodes may also be placed on other substrates () which are pliable in a geometrically stable way, so that that they can be arranged at a uniform distance from material samples with a particular surface topology, in order to obtain uniform exposure.

UV light-emitting diodes as a radiation source in a device for the artificial weathering of samples

A method for determining the time curve of the intensity of radiation present at the location of at least one sample which is being examined. The sample follows a circular path of movement in a sealed sample chamber of a weathering testing device, around a stationary radiation device for producing UW and global radiation. At least one sensor which detects the momentary radiation intensity of the radiation device is provided. The sensor moves together with the at least one sample, and is displaced in relation thereto in relation to the radiation device, for example in the peripheral direction of the path of movement. An electrical signal corresponding to the momentary intensity of the radiation is derived by the sensor at set intervals.

Method and apparatus for determining the time curve of the intensity of radiation in a weathering testing device

Method for treating material samples and apparatus for testing exposure

A UV sensor having a photodetector for measurement of UV radiation, an SiO.sub.2 -containing dispersive element disposed ahead of the photodetector in the direction of incident UV radiation and an optional housing having an entry opening for UV radiation. The dispersive element contains quartz glass with interiorly disposed boundary surfaces, the orientations of which are statistically homogeneously distributed.

Ultraviolet sensor

An illumination system for weathering and fading resistance test instruments is provided with a pulse-driven xenon gas discharge lamp with an elongated discharge bulb that has an electrode spacing in the range from 10 to 50 cm; by adjusting the duty factor of the lamp current by means of an electronic control unit, a predetermined ratio between ultraviolet and infrared radiation is achieved; for the sake of light density, the lamp bulb is bent in a U.

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Alzenau, Germany

Bernd Rudolph