Accuracy-Energy Configurable Sensor Processor and IoT Device for Long-Term Activity Monitoring in Rare-Event Sensing Applications

Figure 2

Event-space quantization and accuracy-configurable event-driven sensor processing flow.

(a) Attribute and its corresponding elapsed time representation

(b) An example of event-space representation for incoming sensor signal

(c) Accurate time sampling

(d) Event sampling with accuracy error

(e) Overall signal processing model with accuracy-controlled signal-to-event conversion