Wearable sensor nodes (target stations) support a wide range of sensors generating data at rates up to 50kbps. Very low level analog signals from the sensors are pre-processed at the sensor node by nano-power circuitry (amplification, filtering, data conversion, data compression, modulation etc.) before being transmitted as an RF signal. This ultra low power RF signal is then transmitted to the basestation. A basestation can wirelessly link up to 8 target stations, each monitoring multiple physiological signals on the body.
Nearly all the electronics and firmware for Sensium life platform sensor nodes or basestations are integrated on to a system on chip called the TZ1030. The TZ1030 operates at ultra low power and includes a highly flexible sensor interface, digital block with 8051 processor and 64kbyte of RAM and an RF transceiver block. On chip program and data memory permits intelligent local processing of signals at the sensor node extracting information such as heart rate from the raw sensor data. This capability can significantly reduce the transmit data payload.
Together with an appropriate external sensor, the TZ1030 can provide ultra low power monitoring of ECG, heart rate, temperature, respiration and physical activity. It also includes the flexibility to interface to sensors with analog or digital outputs.
One or more Sensium enabled wearable sensor nodes can continuously monitor key physiological parameters on the body and report to a basestation Sensium plugged into a PDA or Smartphone. The data can be further filtered and processed there by application software.