Dräger Safety Ag&co. Kgaa

Dragerwerk Aktiengesellschaft

Other

Dr&auml;gerwerk Aktiengesellschaft

Ingo Kaneblei

Ulf Ostermann

Malte Berndt

Stefan Barten

Ingo Pooch

Thomas Wuske

Andreas Nauber

Rainer Polzius

Andreas Mohrmann

Wolfgang Bather

Björn Lange

Frank Weisbach

Markus Wansing

Philip Michael Formica

Sven Schimmel

Matthias Martens

Christof Möller

Sandra Bruegmann

Sandra Brügmann

Frederik Podzuweit

A safety application mobile measuring device () includes a control unit () and a detection unit (). The control unit controls changes between a switched-on state and a switched-off state depending on a received detection signal (). The detection unit monitors, in the switched-off state, whether a switch-on condition () is present and outputs the detection signal, which indicates a change into the switched-on state which is to be carried out. The detection unit monitors the switched-on state as to whether at least two switch-off conditions () are present and outputs the detection signal, which indicates a change into the switched-off state, which is to be carried out, in the presence of at least two switch-off conditions. At least two detection devices () each carry out a detection corresponding to the at least one switch-on condition and to the at least two switch-off conditions.

Mobile measuring device, system and process for a safety-relevant application

A mobile measuring device () includes a power supply module () that includes a rechargeable battery (), a primary battery () and an electronic control unit (). The rechargeable battery is permanently installed in the mobile measuring device and can be charged via a charging device () of the mobile measuring device. The primary battery is also permanently installed in the mobile measuring device. The electronic control unit is configured to guarantee a power supply of the mobile measuring device via the rechargeable battery as long as an electrical minimum power supply is provided by the rechargeable battery and to change to a temporary power supply by the primary battery if the minimum supply power is undershot.

Mobile measuring device with a power supply module and process for power supply

A method is provided for operating a gas concentration monitoring system as well as a gas-measuring device, a central unit, a gas concentration monitoring system as well as computer program product. The safety of persons or the safety of a situation is determined with respect to at least one hazardous gas. The concentration of the gas is provided to a memory and analysis device. A measured value rating number is determined for a preset period of use. A number of instances, of the measured concentration values exceeding of a preset gas concentration limit value is input. A safety code is determined from at least one of: the measured concentration values, the measured value rating numbers and from the a total number of instances in which a gas concentration limit value was exceeded.

Method for operating a gas concentration monitoring system, gas-measuring device, central unit, gas concentration monitoring system as well as computer program product

A gas routing element () for gassing at least one gas-measuring device (-), whereby each gas-measuring device (-) can be arranged in a test module (-) of a calibrating station (). The gas-measuring devices (-) have a first gas inlet opening (-), a communicating feed duct (-) and a communicating first gas outlet openings (--). Second gas inlet openings (--) are connected to a communicating recirculating duct (-) and a second gas outlet opening (-) is connected with the recirculating duct (-) in a gas-communicating manner. A fastening device () fastens the gas routing element () to the calibrating station () or to a test module (-) of the calibrating station (). A calibrating station () is also provided for the gas-measuring devices (-) with such a gas routing element ().

Calibrating station with external gas routing track

A test station for a plurality of test gases, includes a main unit () with a control () and test modules (), each for a gas measurement device, that exchange data to register a type of gas measurement device and test gas(es) required for the device type. The control sets a schedule for a test using a test gas, or for a plurality of successive tests each with different test gases and carries out the specific test planned according to the schedule, in parallel with tests for all of the test modules for a test gas and determines, as an additional gas measurement device is inserted, based on the particular device type of the additional gas measurement device, whether the currently-running test with the current test gas is suitable for the inserted test module; and if the test gas is suitable, to start the test for this test module.

Test station for portable gas measuring devices

A device for the chromatographic detection of a substance provides an improved reproducible measuring process. A monitoring indicator () is provided, which is designed to detect the relative position of a test strip () in relation to the direction of the force of gravity, wherein a processor unit () generates a shut-off signal or interruption signal for the process control system () if a limit value is exceeded.

Device and process for the chromatographic detection of a substance

A thermal imaging camera is provided with at least two different sensitivities for alternating reading and with has a device for linking at least two more and less sensitive images read consecutively. The recording and displaying of thermal images makes it possible to combine images with two different dynamic ranges in a common thermal image, wherein the noise and drift of the pixel signals as well as the amount of storage needed for buffering and processing are reduced at the same time. An image buffering unit is designed as a common accumulator () for both more sensitive and less sensitive original images (B) and makes available a common output image (A). An image weighting unit () is arranged upstream of the accumulator () for weighting the more sensitive and less sensitive original images (B) read alternatingly from the detector unit () pixel by pixel with a settable percentage weighting function (G) and for weighting the output image (A) being buffered in the accumulator () pixel by pixel with a weighting function (I&#x2212;G) complementary to the settable percentage weighting function as well as for the additive superimposition of the two images (B; A) for the purpose of continuously updating the output image (A).

Thermal imaging camera

Tempering of sample () in test strip () is carried out by temperature regulating unit () and heating/cooling unit (). The sample is fed to the test strip by a developer fluid () and a metering unit (). The result of the detection reaction becomes visible by a change in color (), which is detected optically and analyzed. The data of a control chart () with the measured values of first and second temperature sensors () are used to set the control parameters for tempering. Code () on the test sample holder () is read in a sequence of steps. Parameters for phases of the measurement are determined from measured values of first and second temperature sensors, values of the control chart and the code of the test sample holder. These parameters are used by the temperature regulating unit during the measurement.

Process for putting into operation and for operating a measuring device

A safety helmet provides toxic gas monitoring in the field of vision of the helmet user. The safety helmet includes a gas-measuring device of modular design. The safety helmet has a sensor module () positioned in the field of vision of the helmet user.

Safety helmet with gas-measuring device

A device for detecting gaseous and vaporous components of a gas mixture by means of channels , which are located next to each other on a support , are connected in parallel in terms of flow, and are exposed to the component to be detected along a flow axis . A scanning section of a scanning device is provided which extends along one of the channels , for detecting the change in color of reaction zones in the channels . Multiple channel arrangements can also be analyzed in a simple manner with a scanning section evaluating individual channels. At least some of the channels on the support are directed such that an angle &agr; not equal to 0 is formed between the flow axis and the scanning section , and the channels are located in the covered area of the scanning section

Device for measuring the concentration of gaseous and vaporous components of a gas mixture

A process for operating an electrochemical measuring cell ( ) is described, with which it is possible to carry out gas concentration measurements already shortly after switching on the measuring cell ( ). The process includes the steps that potential voltage pulses are applied to the measuring cell ( ) in a state of readiness of the measuring cell ( ), in which the potential voltage is switched off. A system and device are also described.

Process for operating an electrochemical measuring cell

A measuring arrangement for determining the concentration of gases dissolved in a liquid is proposed, which has a simple design and makes possible the use of known gas-measuring apparatus based on color reaction tubes or color reaction capillaries. A preferably flexible tube-like body is provided which is formed of a material that is permeable to the gases to be measured but is impermeable to the liquid. A carrier gas flows on the inside of this body and the body is connected to the gas-measuring apparatus upstream in the direction of the gas flow. The semipermeable material is preferably microporous polytetrafluoroethylene (PTFE).

Measuring arrangement for determining the concentration of gases from

The invention is directed to a method for determining the portion of a gaseous or vaporous component in a gas mixture utilizing a detecting substance which can enter into a chemical reaction with the component to produce a coloration of the detecting substance and utilizing a device for evaluating the coloration. The method includes the steps of: passing the gas mixture at a constant volume flow through a channel containing the detecting substance; detecting a reflectance signal I(t) within a defined spatially fixed length segment of the channel; determining a slope .DELTA.I/.DELTA.t at the start of the chemical reaction during a time interval .DELTA.t in which the detecting substance is present in excess; determining a saturation reflectance signal I.sup.100% toward the end of the chemical reaction which corresponds to an almost complete chemical conversion of the detecting substance within the length segment; and, determining a normalized slope in correspondence to the formal relationship: .DELTA.I/(I.sup.100% *.DELTA.t), which is proportional to the portion of the gaseous or vaporous component.

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Lübeck, Germany

Ingo Kaneblei