Leibniz Universität Hannover Fakultät Fakultät für Elektrotechnik und Informatik
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Institut für Grundlagen der Elektrotechnik und Messtechnik
 
Institut für Grundlagen der Elektrotechnik und Messtechnik Sensorik und Messtechnik Forschungsprojekte
Abgeschlossene Forschungsprojekte

Abgeschlossene Forschungsprojekte des Fachgebiets Sensorik und Messtechnik

  • HiKE IMS MS
    In this research project, the kinetics of ion-molecule reactions in the gas phase as a function of the effective ion temperature will be investigated using a high-energy ion mobility spectrometer (HiKE-IMS) with selective ion sources. In order to generate defined ion populations, a hollow cathode ion source compatible to the HiKE-IMS will be realized within the scope of this research project. In addition, an implementation of a laser ionization source in the ionization region of the HiKE-IMS is planned, in which the ionization of molecules is achieved by resonant multiphoton excitation. This will allow a detailed investigation of reaction rates and reaction rate constants.
    Jahr: 2021
    Förderung: This research is founded by the German Research Foundation (DFG)
  • Novel ion drift tube based on a composite material
    In this project, we have developed a simple manufacturing process for ion mobility spectrometer drift tubes based on a composite material in order to reduce the manufacturing effort. This composite material consists of alternating layers of metal sheets and insulator material, which are connected to each other in a mechanically stable and gastight manner. Furthermore, this approach allows the production of multiple ion drift tubes in parallel in just a few steps from a single piece of material, thus further reducing the manufacturing costs and efforts per unit. The photo shows a drift tube IMS made of such a composite material. With 38.1 mm drift length, only 15 mm × 15 mm cross-section and 57 mm in overall length (outer dimensions) it has high resolving power of Rp = 62 and detection limits in the pptv-range with averaging times of one second.
    Jahr: 2020
  • GIDPROvis
    In GIDPROvis, two original breakthrough technologies - Gas Ion Distillation (GID) and Sequential Ion Processing (PRO) - provide live visualization (vis) of volatile chemicals in ambient environments giving humans access to a molecular world heretofore unseen. Molecular auras in GIDPROvis are delivered by small GIDPRO analyzers based on high speed separation of ions derived from individual chemicals and their identification using an emerging generation of ion analyzers.
    Jahr: 2020
    Förderung: European Union’s Horizon 2020 FET Open programme under grant agreement No 899261
  • MiniLAB
    The aim of the cooperation project MiniLAB is the development of a portable instrument for fast on-site monitoring and detection of pollutants in water based on nano high performance liquid chromatography (nano-HPLC) and electrospray ionization (ESI) ion mobility spectrometry (IMS). The main tasks of the subproject are the realization of a high voltage isolated data acquisition as well as the control of the ESI parameters during a run of a solvent gradient.
    Jahr: 2019
    Förderung: Supported by the German Federal Ministry of Economics and Technology (BMWi) upon decision of the German Bundestag, Grant 20666 N
  • ReCoWind (Reliable power Converters for Wind turbines) - Measurement and Modeling of Moisture Migration on Component and System Level
    In the framework of the ReCoWind project the failure causes of wind turbine’s power converters are investigated as well as appropriate countermeasures are worked out. Therefore, a combined top-down and bottom-up approach is applied in order to evaluate field studies of wind turbines’ failures and breakdowns, to carry out additional investigations and to work out the failure principles on the component and system level. The evaluation of a possible degradation processes due of corrosive or harmful gases respectively is one research topic of this subproject. The main focus is on the moisture migration to the power modules of the frequency converter, which is assumed to be most significant failure cause. Furthermore, an understanding for the temperature and moisture distribution in the power module (component level) and the power converter’s cabinet (system level) will be worked out. Hereby, the modelling of moisture migration and transport is necessary, as well as the development of measurement technology and sensors for moisture and temperature with a high spatial resolution. Based on the findings of power converters’ failure causes, appropriate countermeasures will be worked out, which could increase the reliability of wind turbine’s power converters.
    Jahr: 2018
    Förderung: This Project is supported by the Federal Ministry for Economic Affairs and Climate Action (BMWK), Grant 0324336E
  • Development of an in-line measurement system for blood parameters for individualized patient therapy during dialysis
    The goal of this work is to enable a continuous detection of the relevant blood parameters during dialysis treatment, such as electrolyte and urea concentration. This allows a real-time monitoring during the treatment. Thus, the dialysis can be controlled precisely and a more gentle treatment for the patient can be achieved. For this purpose, a novel electrochemical and electromagnetic in-line sensor concept will be developed to determine the blood parameters in extracorporeal circuits.
    Jahr: 2016
    Förderung: This work is supported by the German Federal Ministry of Education and Research (BMBF) under the grant 13GW0085B.
  • Ion Mobility Spectrometer with a Resolving Power of R = 100
    For the analysis of gas mixtures at atmospheric pressure we developed a compact drift tube ion mobility spectrometer (IMS) with a length of about 100 mm and an outer diameter of 30 mm. Furthermore, the resolving power belongs to R=100. The IMS can be operated in a temperature range between room temperature and 100°C. Due to the institute’s own machine shop it is also possible to rapidly modify the IMS for many applications. For example, the ionization region can modified, thus several ionization sources can be compared. Of course, the detection region can be modified to adapt the IMS to a mass spectrometer.
    Jahr: 2016
  • Electromagnetic sensors for biochemical and biomedical applications
    The major advantages of electromagnetic sensors are a compact design and cost effective realization. In different projects, sensors (e.g. coaxial measuring chambers, open-ended coaxial probes, coplanar probes, split-ring resonators) are designed and tailored to the requirements of specific applications. Current research includes measurements of brain tissue humidity in forensic examinations, noninvasive cell growth monitoring in single use bioreactors and detection of ethanolamine in fluid.
    Jahr: 2016
  • Shutterless IMS
    The use of non-radioactive electron sources for ionizing the target analytes in Ion Mobility Spectrometers (IMS) can lead to new application options. For example, our electron source can be operated in a fast pulsed mode. By optimizing the geometric parameters and developing fast control electronics, we can achieve very short electron pulses for ionization with high intensities, and an adjustable pulse width of down to a few nanoseconds. This results in small ion packets at simultaneously high ion densities. By omitting the separate reaction chamber the ion packet can be generated directly at the beginning of the drift tube with only slight reduction in resolving power. Thus, the complex and costly shutter mechanism and electronics can also be omitted, which leads to a simple low cost IMS-system with a pulsed non-radioactive source, and a resolving power of 70 to 80.
    Jahr: 2016
  • Ion-selective ppb-level gas sensor
    The objective of this work is the development of a fast ion-selective ppb-level gas sensor based on pulsed atmospheric pressure chemical ionization and ion-ion-recombination kinetics. The major tasks are the characterization of the ion generation and ion-ion-recombination kinetics of gas mixtures with various analytes and concentrations. Further, the measurement data should be analyzed by appropriate pattern recognition algorithm.
    Jahr: 2016
    Förderung: This research is founded by the German Research Foundation(DFG)
  • Ultra high resolution ion mobility spectrometry
    The aim of this research is the development of an ion mobility spectrometer with a resolving power above 300 and limits of detection in the pptv range for measurement times of less than a second. Furthermore, the performance using various non-radioactive ion sources such as X-ray and UV sources, electrospray ionization as well as non-radioactive electron emitters is being investigated. With a resolving power of 250 even for small, single-charged ions, the current setup is at the moment the highest resolving ion mobility spectrometer worldwide and the first device to separate isotopologues.
    Jahr: 2016
    Förderung: This research is founded by the German Research Foundation (DFG)
  • TOXI-triage
    TOXI-triage project address the operational; technological; ethical and societal dimensions of CBRN response and recovery, and importantly the economic base from which sustainable CBRN and multiuse systems are derived.
    Jahr: 2015
    Förderung: European Union’s Horizon 2020 research and innovation programme under grant agreement No 653409

Letzte Änderung: 02.06.25 Druckversion

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