Difference between revisions of "Chemical Sensors Notes SP2010"

From ESE497 Wiki
Jump to navigationJump to search
 
(6 intermediate revisions by 2 users not shown)
Line 3: Line 3:
 
* Faculty Supervisor: Arye Nehorai
 
* Faculty Supervisor: Arye Nehorai
 
* Goal:
 
* Goal:
** Determine the ability (accuracy and precision) of the current
+
** Determine the ability (accuracy and precision) of the current sensors to measure concentration
sensors to measure concentration
 
 
*** Test on substance like ethanol that the sensors are designed for
 
*** Test on substance like ethanol that the sensors are designed for
*** If accuracy and precision are sufficient for source localization,
+
*** If accuracy and precision are sufficient for source localization, continue with these sensors, otherwise, we will have to find different sensors
continue with these sensors, otherwise, we will have to find different
 
sensors
 
 
*** Test whether acquisition time can be shortened for concentration measurement
 
*** Test whether acquisition time can be shortened for concentration measurement
*** Test whether performance improves with a different experimental
+
*** Test whether performance improves with a different experimental setup (e.g., using a fan to blow air across the sensor)
setup (e.g., using a fan to blow air across the sensor)
+
** Incorporate digital resistors into the circuit design to allow on-line optimal concentration estimation
** Incorporate digital resistors into the circuit design to allow
+
** Program a function in Matlab to estimate the direction to the source from the concentration measurements of two sensor arrays
on-line optimal concentration estimation
 
** Program a function in Matlab to estimate the direction to the
 
source from the concentration measurements of two sensor arrays
 
 
*** Test with simulations in Matlab
 
*** Test with simulations in Matlab
** Incorporate the direction estimation into a guidance program for
+
** Incorporate the direction estimation into a guidance program for the robotic platform
the robotic platform
 
 
*** The robot should move to seek out the source of the odor
 
*** The robot should move to seek out the source of the odor
*** It should update its direction of movement periodically according to
+
*** It should update its direction of movement periodically according to new direction estimates
new direction estimates
+
 
 +
----
 +
*Status
 +
**Week 1- completed the experiments necessary in the development of an algorithm relating chemical concentration to sensor sensitivity.
 +
**Week 2- ran experiments with 0 drops concentration and 10 drops concentration
 +
**Week 3- changed the resistance of sensors 2 and 3 to result in better concentration differentiation

Latest revision as of 19:07, 27 April 2010

  • Team Members: Joy Chiang
  • PhD Supervisor: Vanessa
  • Faculty Supervisor: Arye Nehorai
  • Goal:
    • Determine the ability (accuracy and precision) of the current sensors to measure concentration
      • Test on substance like ethanol that the sensors are designed for
      • If accuracy and precision are sufficient for source localization, continue with these sensors, otherwise, we will have to find different sensors
      • Test whether acquisition time can be shortened for concentration measurement
      • Test whether performance improves with a different experimental setup (e.g., using a fan to blow air across the sensor)
    • Incorporate digital resistors into the circuit design to allow on-line optimal concentration estimation
    • Program a function in Matlab to estimate the direction to the source from the concentration measurements of two sensor arrays
      • Test with simulations in Matlab
    • Incorporate the direction estimation into a guidance program for the robotic platform
      • The robot should move to seek out the source of the odor
      • It should update its direction of movement periodically according to new direction estimates

  • Status
    • Week 1- completed the experiments necessary in the development of an algorithm relating chemical concentration to sensor sensitivity.
    • Week 2- ran experiments with 0 drops concentration and 10 drops concentration
    • Week 3- changed the resistance of sensors 2 and 3 to result in better concentration differentiation