A new Raspberry Pi smart shoe sensor has been created by the Shoe Crew, a senior design team from Purdue University’s ECE 49022 course. Smart shoe sensor has been created to provide athletes returning from injury a way to monitor their progress during physical therapy by providing quick and easy-to-understand data about their stride.
The development team behind the Raspberry Pi Smart shoe sensor explains more about its construction and components. “The Smart Shoe Sensor uses a homemade shoe insert equipped with sensors connected to a small PCB outside the shoe that can be strapped to the user’s ankle. The PCB is equipped with a CC2640R2 microcontroller module that can connect to an external device via BLE to transmit data from the sensors. We used a Raspberry Pi to receive the data and run a script to plot a color map showing the weight applied to each sensor.”
“The shoe insert is made of conductive foam and has 8 sensors attached to it. Each sensor consists of a small, rectangular copper plate on top of the foam with a shared ground plate on the bottom of the foam. Using a multiplexer, each sensor is delivered a reference current of 600 nA one at a time. The voltage across the currently-active sensor is then read by the CC2640R2 using its ADC. When the conductive foam is depressed, its resistance decreases, allowing us use the resultant voltage across the sensor to determine the magnitude of the weight being applied.”
More details on the Raspberry Pi project jump over to the Hackster.io website by following the link below.
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