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Blog Cat Detector Using Sand #1 : The Idea
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  • Author Author: dubbie
  • Date Created: 23 Sep 2020 2:13 PM Date Created
  • Views 4034 views
  • Likes 12 likes
  • Comments 17 comments
  • cat detector
  • sensorsch
  • sensorch
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Cat Detector Using Sand #1 : The Idea

dubbie
dubbie
23 Sep 2020

I have tried to detect cats in my garden previously (CatDogFoxBot #6 : Trying out an Artificial Neural Network ) without much success so I was  quite excited to discover that I had accidentally created a cat detector yesterday. I am part way through installing a path through my lawn when I had to stop as I had run out of brick pavers as for some reason it now takes three weeks to deliver them instead of one. I had put down the sharp sand ready for the bricks (whenever they might appear) and packed up. I was surprised - and delighted - to discover this morning that I had created a cat detector!

 

image

 

With this cat detector I can measure how many cats have passed this way (one!), how many legs it had (four) and which direction it was going (West). It is also possible to detect if it had rained as well (it had).. With a bit of calibration I am sure it would also be possible to measure how heavy the cat was.

 

There are some drawbacks to this system. It does need re-smoothing after every measurement but I'm sure some sort of mobile robot sweeper could be constructed to do that, ?Nor does it give an accurate indication of the time at which the cat passed by - only that it was some time last night. Maybe I could install some sort of pressure plate connected to a data logger.

 

I think I will go out and re-smooth it now and see if any more cats pass by.

 

Dubbie

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Top Comments

  • michaelkellett
    michaelkellett over 5 years ago +7
    My dog can detect cats and has a very effective acoustic alert system which can wake up anyone - including my son. Unfortunately she suffers from a large number of false alarms, and has been set off several…
  • dougw
    dougw over 5 years ago in reply to DAB +5
    Is that one of those Heisenberg corollaries? The measurement system affects the measurement...in this case cats get attracted to the sensor because it is a good place to do some business....
  • beacon_dave
    beacon_dave over 5 years ago +3
    For a second there I thought you had created a version of Tim Hunkin's 'Common Ground' animated collection box. I can't seem to find a good video of it on-line, I think the video must be on his DVD https…
  • dubbie
    dubbie over 5 years ago in reply to DAB

    DAB,

     

    Fortunately, my sand has not yet detected any cat related business. My raised beds on the other hand have been very successful in this area.

     

    Dubbie

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  • dubbie
    dubbie over 5 years ago in reply to jw0752

    John,

     

    I hadn't thought of that aspect. Someone does have to bend over the sand and rescrape it every day though. Still, people don't use batteries either.

     

    Dubbie

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  • dubbie
    dubbie over 5 years ago in reply to beacon_dave

    Dave,

     

    This is the first time I have heard of Tim Hunkin, but I do lead a very sheltered life.

     

    Dubbie

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  • dubbie
    dubbie over 5 years ago in reply to michaelkellett

    Michael,

     

    Sadly, no dog to incorporate into a cat detector. However, we do have dogs located in several nearby neighbours and I assume from the amount (constant!) barking that takes place, that there must be a continuous stream of cats passing by. That, or dogs just like to bark.

     

    Dubbie

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  • colporteur
    colporteur over 5 years ago in reply to DAB

    Litter is bitter when cat owner's let them pitter and patter but skitter and skatter before a scope of poop.

     

    Oh the humanity as a result of two rum in cokes!

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