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Sensing Baby Kicks

ipv1

I have made a belt for sensing when our unborn child kicks from the inside. This is useful for tracking activity and health of the baby. In my current configuration, I am using a piezoelctric sensor strip but there are a few issues.

  1. The strip is small and cannot cover a large surface area.
  2. It will not discriminate between kicks and movement caused by the mother herself.


I was able to condition the signals and send them over BTLE but the sensor is an issue.

Can anyone suggest? Thanks.

Parents

  • Interesting theories. Dough 's solution will need too much tweaking but will be a better one in the long run.

    Jan's solution has one issue- the cloth worn tightly will be uncomfortable over time.

    But I'm getting good ideas. More inputs please.

  • in reply to ipv1

    In my defence, I'm going to suggest to buy stretching resistive cloth

  • in reply to Jan Cumps

    http://openmaterials.org/materials-101-electrotextiles/

     

    Electrolycra from Mindsets: looks and feels like ordinary lycra but it’s highly conductive. Its conductivity in one direction depends on how tightly it is stretched – if you pull it the resistance increases and then drops again when stretched even tighter. When cut into a thin strip, the material also warms up when current is passed through it and can thus provide the basis of a heated garment. A 6V battery will cause an appreciable warming effect. Resistivity: 5 ohms per 100mm, increasing to 20 ohms when stretched to 150mm. If the material is turned through 90º and stretched the resistance drops to 2.5 ohms

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  • in reply to Jan Cumps

    http://openmaterials.org/materials-101-electrotextiles/

     

    Electrolycra from Mindsets: looks and feels like ordinary lycra but it’s highly conductive. Its conductivity in one direction depends on how tightly it is stretched – if you pull it the resistance increases and then drops again when stretched even tighter. When cut into a thin strip, the material also warms up when current is passed through it and can thus provide the basis of a heated garment. A 6V battery will cause an appreciable warming effect. Resistivity: 5 ohms per 100mm, increasing to 20 ohms when stretched to 150mm. If the material is turned through 90º and stretched the resistance drops to 2.5 ohms

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