Speed Control Of Wiper Motor

Replies

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  Ramani Aswath

  venkat15

  The sensor is Rain drop Sensor

  Once the sensor has a film of water on it it cannot sense more water falling on it. Looks as if it senses the resistance between the two conducting strips. It is very doubtful if this gives a variable signal with rain fall rate.
  
  Decades back one method tried was to have a porous resistor exposed to the rain. The resistance of this was kept constant by passing a current through it to dry the water. More current was needed if the rain rate was more. The current flowing was used to monitor the rain rate.
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  lal

  What is the whole system is made closed loop. Implement some method to mechanically wipe the water drop sensor at the same rate wiper operates (might require more than one sensor for this to operate effectively). Now it should be possible to determine the rate at which sensors get wet, which further may be made use of to determine the speed of wiping.