Active Chemical Sampling System for Underwater Chemical Source Localization

This paper investigates the effect of active water sampling to enhance chemical reception for small underwater robots. The search for a chemical source in a stagnant water environment is not an easy task because the chemical solution released from the source stays in the close vicinity of the source. No signal is obtained even if a robot with chemical sensors is placed a few centimeters from the chemical source. In the system under study, four electrochemical sensors are aligned in front of a suction pipe that draws water samples from the surroundings. Owing to the smooth laminar flow converging to the suction port, the streak of the chemical solution drawn to the sensors is shaped into a thin filamentous form. To prevent the chemical solution from passing between the sensors without touching their surfaces, slits are placed in front of the sensors to guide the incoming chemical solution from different directions to the corresponding sensors. A chemical source can be located by moving the system in the direction of the sensor showing the largest response. It is also shown that the chemical reception at the sensors can be significantly enhanced when the system is wobbled to introduce disturbances.

[1]  Hiroshi Ishida,et al.  Chemical plume tracking. 3. Ascorbic acid: a biologically relevant marker. , 2002, Analytical chemistry.

[2]  D. B. Dusenbery Sensory Ecology: How Organisms Acquire and Respond to Information , 1992 .

[3]  Adam P. Summers,et al.  Functional morphology of the feeding apparatus, feeding constraints, and suction performance in the nurse shark Ginglymostoma cirratum , 2008, Journal of morphology.

[4]  J. Cox Hydrodynamic aspects of fish olfaction , 2008, Journal of The Royal Society Interface.

[5]  Hiroshi Ishida,et al.  Crayfish Robot That Generates Flow Field to Enhance Chemical Reception , 2012 .

[6]  S. Lukaschuk,et al.  The flow generated by an active olfactory system of the red swamp crayfish , 2006, Journal of Experimental Biology.

[7]  Gary S. Settles,et al.  Sniffers: Fluid-Dynamic Sampling for Olfactory Trace Detection in Nature and Homeland Security—The 2004 Freeman Scholar Lecture , 2005 .

[8]  K. Mead Inspiration from Nature:Insights from Crustacean Chemical Sensors Can Lead to Successful Design of Artificial Chemical Sensors , 2012 .

[9]  Frank W. Grasso,et al.  Integration of Flow and Chemical Sensing for Guidance of Autonomous Marine Robots in Turbulent Flows , 2002 .

[10]  J. Yen,et al.  Advertisement and concealment in the plankton: what makes a copepod hydrodynamically conspicuous? , 1996 .

[11]  Jelle Atema,et al.  The Function of Bilateral Odor Arrival Time Differences in Olfactory Orientation of Sharks , 2010, Current Biology.

[12]  Frank W. Grasso,et al.  Biomimetic robot lobster performs chemo-orientation in turbulence using a pair of spatially separated sensors: Progress and challenges , 2000, Robotics Auton. Syst..

[13]  J Atema,et al.  Eddy Chemotaxis and Odor Landscapes: Exploration of Nature With Animal Sensors. , 1996, The Biological bulletin.

[14]  Joseph Ayers,et al.  Biomimetic approaches to the control of underwater walking machines , 2007, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[15]  M J Weissburg,et al.  Odor plumes and how blue crabs use them in finding prey. , 1994, The Journal of experimental biology.

[16]  F. Grasso,et al.  How lobsters, crayfishes, and crabs locate sources of odor: current perspectives and future directions , 2002, Current Opinion in Neurobiology.

[17]  T. Breithaupt,et al.  Fan Organs of Crayfish Enhance Chemical Information Flow , 2001, The Biological Bulletin.

[18]  Jay A. Farrell,et al.  Moth-inspired chemical plume tracing on an autonomous underwater vehicle , 2006, IEEE Transactions on Robotics.