Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Sebastian Kibler

Martin Richter

Martin Wackerle

Juergen Kruckow

Christian Wald

Yuecel Congar

Henry Leistner

Agnes Bußmann

Rene Linssen

Agnes Bussmann

Lorenz Gruenerbel

Lorenz Grünerbel

What is suggested is a micromembrane pumping device for pumping a fluid, having: a pump chamber to which an inlet valve, an outlet valve, and a membrane device for varying a volume of the pump chamber are associated, wherein the membrane device has a plate-shaped actuator for deforming the membrane device; and influencing means for influencing the plate-shaped actuator and the volume of the pump chamber; wherein the membrane device has a plate-shaped membrane body limiting the pump chamber; wherein the plate-shaped actuator is arranged on a side of the plate-shaped membrane body facing away from the pump chamber; wherein the plate-shaped actuator is mounted to and electrically insulated from the plate-shaped membrane body by an electrically insulating glue layer; wherein at least one embedded portion of a support body at or in which a deformation sensor for detecting a deformation of the membrane device is arranged, is arranged within the glue layer to detect the volume of the pump chamber; wherein the influencing means, the plate-shaped actuator and the deformation sensor form a closed-loop control circuit for regulating a volume flow.

Micromembrane pumping device

According to an embodiment, a sensor arrangement comprises a first micropump, e.g. a microfluidic or peristaltic pump, having a normally closed (NC) safety valve, e.g. at the micropump output, a second micropump, e.g. microfluidic or peristaltic pump, having a normally closed (NC) safety valve, e.g. at the micropump output, and a sensor having a sensor chamber, e.g. a sensor cavity or sensor volume, with a sensor element, e.g. an active sensitive region or layer, in the sensor chamber, wherein the sensor is configured to provide a sensor output signal based on a condition of the fluid, e.g. a gas or liquid, in the sensor chamber. The sensor chamber of the sensor is fluidically coupled between the first and second micropump, and the first and second micropump are configured to provide a defined operation mode of the sensor arrangement based on the respective activation or operation condition of the first and second micropump for providing (1.) a defined negative fluid pressure in the sensor chamber, (2.) a defined positive fluid pressure in the sensor chamber or (3.) a defined fluid flow, e.g. fluid throughput, through the sensor chamber.

Sensor arrangement and method for sensing an amount or a concentration of a target fluid in a medium with the sensor arrangement

A microstructured fluid flow control device includes a substrate with a piezo-actuated first membrane arranged on a first substrate side, and a fluid channel that extends through the substrate between the first substrate side and an opposite second substrate side. In addition, the microstructured fluid flow control device includes a microvalve that extends through the fluid channel and is configured to close the fluid channel in an unactuated state, and a second membrane arranged on the first substrate side and spaced apart from the membrane and arranged between the fluid channel and the first piezo-actuated membrane. The second membrane is joined to the microvalve and is mechanically biased towards the first membrane so that a biasing force is applied to the microvalve, wherein the biasing force is part of a restoring force that causes the microvalve to close the fluid channel in an unactuated state.

Microstructured fluid flow control device

The invention relates to a free-jet dosing system for dosing a free fluid jet to be dispensed. The free-jet dosing system includes, inter alia, a pump including an inlet and an outlet and configured to deliver fluid to be dispensed to the outlet. The free-jet dosing system further includes a dosage monitoring device arranged on the outlet side of the pump, the dosage monitoring device having an opening through which at least some of the fluid to be dispensed may pass, and the dosage monitoring device having a flow rate meter configured to determine the flow rate of the fluid which passes through the opening of the dosage monitoring device. In the inventive free-jet dosing system, the opening of the dosage monitoring device is configured as an outlet nozzle for ejecting the free fluid jet.

Free-jet dosing system

A controllable scent sample dispenser has a microdosing device for outputting, during an activation state, a scent sample at a scent sample outlet to the environment, wherein the microdosing device is placeable adjacent to an animal's nose so that a distance between the outlet of the microdosing device and a nare or nostril of the animal's nose is within a predefined range, and a microdosing driver unit for adjusting a dosing rate of the scent sample output at the scent sample outlet by selectively activating the microdosing device.

Controllable scent sample dispenser, and animal training and testing system for detecting scents

A fluid sample dispenser includes a microdosing device for outputting, during an activation state, a fluid sample at a fluid sample outlet to the environment, wherein the microdosing device is placeable adjacent to a person's nose so that a distance between the outlet of the microdosing device and a nostril of the person's nose is within a predefined range, and a microdosing driver unit for adjusting a dosing rate of the scent sample output at the scent sample outlet by selectively activating the microdosing device.

Controllable fluid sample dispenser and methods using the same

The invention relates to a method as well as a microdosing system for dosing an amount of fluid to be dispensed, wherein the microdosing system includes a micropump including an inlet and an outlet and configured to suck the fluid to be dispensed through the inlet and to dispense at least part of the fluid from the outlet. Further, the inventive microdosing system includes a first flow sensor arranged on the inlet side or the outlet side having an opening and a flow rate meter, wherein the flow rate meter is configured to determine the flow rate of the fluid passing through this opening. Additionally, the inventive microdosing system includes calibrators and/or fault detectors of the first flow sensor.

Microdosing system

A test station for testing at least one of fluidic component arranged on a substrate, each fluidic component having a fluidic port, comprises a carrier device for holding the substrate with the at least one fluidic component, a connecting device for fluidically connecting the fluidic port of the at least one fluidic component located in a testing position to a first adapter element of the connecting device, and a displacement device configured to displace the substrate and the connecting device relative to each other, and to bring the substrate into the testing position.

Test station and method for testing fluidic components

A microfluidic device for detecting a flow parameter, includes a channel configured within a base body, the channel including a first inlet for feeding a first fluid and a second inlet for feeding a second fluid so as to form a fluid stream having the first and second fluids within the channel, and further including an output for providing the fluid stream on the output side, a first feeder including a micropump associated with the first inlet for selectively feeding the first fluid to the channel, a second feeder associated with the second inlet for feeding the second fluid to the channel; and a detector for detecting, on the basis of a different physical property of the first fluid and the second fluid within the channel, a measurement value dependent on a current flow parameter of the first or second fluid.

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Munich, Germany

Sebastian Kibler