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Infrared Sensor

The beetle Melanophila acuminata can detect infrared radiation (IR) from distant forest fires by specialized IR sensilla in two metathoric pit organs (see arrow), containing about 70 dome-shaped sensilla. We develop in cooperation with the University Bonn a new a new infrared sensor based on this principle.

The beetle Melanophila acuminata, Fig. 1, can detect infrared radiation (IR) from distant forest fires by specialized IR sensilla in two metathoric pit organs (see arrow), containing about 70 dome-shaped sensilla. Incoming IR radiation is absorbed in the complex structure of the sensilla and pressurize the water inside the spongy intermediate layer. The pressure rise deforms the membrane of the dendritic tip of a mechanosensitiv cell.

SensillumFig. 2: Comparison of the sensillum (left) with the model of the sensor (right)

  

A model of the sensor is shown in Fig.2. Similar to the sensillum the sensor contains an internal water-filled cavity, which is etched into a silicon wafer. The cavity is closed on the one side by a glass window and on the other side by a thin silicon membrane. The absorbed IR-radiation produces a change in pressure due to change of state of the water and the deflection of the membrane caused by this pressure increase can be read out by a capacitive detector or a tunnelling displacement transducer..

 

In the first instance of a biomimetic project the biological principle has to be investigated. For the evaluation of the principle we use mathematical models, Fig. 3, and finite element methods, Fig. 4

 

Finite element model fort the calculation of the temperature distribution in the cavityFig. 4: Finite element model fort the calculation of the temperature distribution in the cavity

 

Collaborations:

University of Bonn, Research Center Caesar, Technical University Dresden, DIAS Infrared GmbH

References:

1.      Schmitz, H. and Bousack, H.; Insect Infrared Sensors, charpter in “Encyclopedia of Nanotechnology”, Editor: B. Bhushan; Springer Verlag , accepted for publication

2.      Schmitz, H.; T. Kahl, H. Soltner and Bousack, H.; Biomimetic infrared sensors based on the infrared receptors of pyrophilous insects, Smart Structures / NDE, San Diego, USA, 6. -10. 3. 2011, accepted for publication

3.      Klocke, D., Schmitz, A., Soltner, H., Bousack, H. and Schmitz, H.; Infrared receptors in pyrophilous („fire-loving“) insects a model for new uncooled Sensors, Beilstein Journal of Nanotechnology, accepted for publication

4.      Schmitz, H., Soltner, H., and Bousack, H.; Biomimetic infrared sensors based on photomechanic  infrared receptors of pyrophilous (“fire-lovin”) insects, IEEE Sensors Journal, accepted for publication

5.      Bousack, H., Schmitz, H.;   Design of a fluidic infrared detector based on the photomechanic infrared sensilla in pyrophilous beetles, chapter in “Frontiers in Sensing – Biology and Engineering”, Editors: F. G. Barth , J. A.C.  Humphrey, M. V.; Springer Verlag , accepted for publication

6.      Bousack, H., Soltner H., Schmitz, H. und Offenhäusser, A.; Untersuchung eines bionischen Infrarot-Detektors nach dem Vorbild der infrarotempfindlichen Sensillen des Schwarzen Kiefernprachtkäfers Melanophia acuminata, Beitrag „Sensoren und Messsysteme 2010“, Nürnberg, 18. - 19.5.2010, VDE Verlag GmbH Berlin Offenbach, S. 197 - 203

7.      Soltner, H., Bousack, H. und Schmitz, H.; Zur transienten Temperaturentwicklung in einem fluidischen Infrarot-Detektor auf der Basis der infrarotempfindlichen Sensillen des Schwarzen Kiefernprachtkäfers Melanophila acuminata, Proceedings MikroSystemTechnik Kongress 2009, VDE Verlag GmbH Berlin Offenbach, S. 401 – 404, 2009

8.      Schmitz, H., Bousack, H., Schmitz, S.; Lacher, M.; The infrared sensilla in the beetle Melanophia acuminata as model for fire sensors, Proceedings of 14. Int. Conference on Automatic Fire Detection, Duisburg, 8 - 10. Sept. 2009

9.      Schmitz, H., Norkus. V., Hess, N., Bousack, H.; The infrared sensilla in the beetle Melanophia acuminata as model for new infrared sensors, Microtechnologies for the New Millenium, Dresden, 4 - 6. May 2009

10.  Bousack, H., Schmitz, H., Müller. M. and Offenhäusser, A.; A Fluidic Infrared Detector Based on the Infrared Sensilla in the Beetla Melanophia acuminata, Eurosensors XXII, Dresden, (2008), S. 144 – 147

11.  Bousack, H., Schmitz, H. and Offenhäusser, A.; Design of a Fluidic Infrared Detector Based on the Infrared Sensilla in the Beetle Melanophia acuminata, Actuator 2008, 11th International Conference on New Actuators, Bremen, (2008), S. 786 – 789

12.  Bousack, H. und Offenhäusser, A.;Zur Konzeption eines fluidischen Infrarot-Detektors mit kapazitiver Auslese, Dresdner Beiträge zur Sensorik, Band 29 (2007), S. 313 – 316, TUDpress

13.  Bousack, H. und Offenhäusser, A.;Systemanalyse eines fluidischen Infrarot-Detektors mit kapazitiver Auslese als einfaches Modell für die infrarotempfindlichen Rezeptoren des Schwarzen Kiefernprachtkäfers, Proceedings MikroSystemTechnik Kongress 2007, S. 991 – 994 


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