Robert Boschgmbh

Siemens Audiologische Technik Gmbh

Koninklijke Philips Corporation N.v.

Thomas Hanses

Torsten Niederdränk

Georg-Erwin Arndt

Henning Puder

Hartmut Ritter

Bernd Siber

Thomas Fischer

Stefan Weiss

Alexander Herrmann

Gunter Sauer

Susanne Weidenfeld

Markus Ulrich

Joachim Eggers

Ralph Bergmann

Jens-Alrik Adrian

Joerg Turner

Robert Hartl

Sonja Tiedemann

Christopher Haug

Gerhard Gruener

Wolfgang Werkmeister

Joerg Tuermer

Stefan Heindl

Kathrin Reinhold

Anton Pfefferseder

Xiaozhou Zhang

Dirk Henze

The present invention provides an optical fire sensor device and a corresponding fire detection method. The optical fire sensor device is equipped with an optical particle detection unit (), which is configured to ascertain measured values of a particle number in a measurement volume range (FA) as a function of a particle size in a predetermined particle size range and/or as a function of a particle speed in a predetermined particle speed range, a fire detection unit (), which is configured to ascertain respective distributions of the measured values and to compare at least one parameter of the ascertained distributions to at least one predetermined criterion. The fire detection unit () is configured to detect a fire (B) in consideration of the comparison. An alarm unit () is used to output an alarm signal in response to the detection of the fire (B) by the fire detection unit ().

Optical fire sensor device and corresponding fire detection method

A fire monitoring systemhaving at least a first and a second monitoring camerafor outputting monitoring images, wherein the viewing fieldsof the first and the second monitoring cameraoverlap in a common monitoring region, having an evaluation devicefor identifying a firein the monitoring imagesis constructed, wherein the evaluation deviceis constructed to output positional information of the fireby way of evaluating the monitoring images

Fire monitoring system

A photoelectric smoke detectorfor detecting smoke particlesis disclosed, the smoke detectorcomprising: a light emitting element, a light receiving elementfor receiving lightemitted by the light emitting elementand scattered by the smoke particlesand for outputting a detection signalobtained by photoelectrical converting the received light, an amplifier circuitfor amplifying the detection signaland providing an amplified output signal, wherein the amplified output signalmay be divided into an offset-signaland an amplified detection signal, whereby the photoelectric smoke detectoris adapted to operate in a pulsed mode, so that the detection signalcomprises high-frequency components, whereby the amplified detection signalis determined by high-frequency components of the detection signaland that the offset-signalis determined by low-frequency components of the detection signaland/or by low-frequency components of at least an intermediate signal based on the detection signal, and whereby the amplifier circuitis adapted to transfer the high-frequency components with a higher gain and to transfer the low-frequency components with a lower gain in order to improve the signal ratio between the amplified detection signaland the offset-signal

Photoelectric smoke detector and process for testing the photoelectric smoke detector

Fire detector installations comprise fire detectors as sensor devices for detecting fires, smoke, flames or other signs of fire, and are used in both public buildings, such as schools or museums, and in private buildings. The invention relates to a detection device () for detecting fires and/or signs of fire in an area to be monitored, said detection device comprising an image-producing sensor element () for emitting image data, and an optical element () mounted upstream of the sensor element (), which together form a camera system () for monitoring the area to be monitored. The detection device also comprises an evaluation element () designed to detect fires or signs of fire in the area to be monitored by evaluating the image data. The optical element () is arranged and/or embodied in such a way that the field of vision () of the camera system has a maximum viewing angle alpha of at least 120&#xb0;, preferably at least 150&#xb0;, and especially at least 180&#xb0;, in at least one plane which is coplanar to the direction of observation () of the camera system ().

Detection device and method for detecting fires and/or signs of fire

The cleaning and exchange of components of the hearing aid which is necessary at regular intervals due to the conventional contamination is uncomfortable and expensive. The housing (G) and any protective devices (K) which are to protect from contamination, are provided with a dirt-resistant layer. In this way, the dirt adheres less strongly to the hearing aid, so that if necessary it can be removed by means of tapping.

Hearing aid with cerumen protection

The microphones used in hearing devices normally possess different characteristic lines that are to be adapted to one another. For this purpose, the amplitude of an output signal of a first microphone and the amplitude of an output signal of a second microphone are measured. The output signal of the first microphone is subsequently filtered dependent on both measured amplitudes, such that the difference between the two output signals is reduced. One of the two microphones hereby serves as a reference, and an absolute normalization can be foregone.

Circuit and method for adaptation of hearing device microphones

In a hearing aid and method for automatically switching to a telephone mode, for automatically detecting a telephone situation for the wearer given a binaural supply, the difference between the levels of the input signals of the two hearing devices is measured and compared with at least one threshold value. If the difference in levels drops below or exceeds the threshold value, the respective hearing device is switched to the telephone mode.

Hearing aid and operating method for automatically switching to a telephone mode

Growing community of inventors

Feldkirchen-Westerham, Germany

Thomas Hanses