Research Article

A Sub- A Ultrasonic Wake-Up Trigger with Addressing Capability for Wireless Sensor Nodes

Table 2

Parameters of the state diagram of Figure 9 for all the relevant configurations of VirtualSense. All the parameters were measured on a mote powered at 3 V, with the MCU clocked at 16 MHz and the ultrasonic module powered at 2 V.

ConfigurationWaitUnintendedReceiveTransmit
[µW][µJ][ms][µJ][ms][µJ]

Baseline 3,451.5 1,502.3 73.4 1,559.44 50.0 3,697.11

Standby 747.5 1,502.3 73.4 1,559.44 50.0 3,697.11
Standby FF 747.5 521.4 73.4 1,559.44 50.0 3,697.11

Sleep 734.4 1,502.3 73.4 1,559.44 50.0 3,697.11
Sleep FF 734.7 521.4 73.4 1,559.44 50.0 3,697.11

Sleep US 3.678 1,503.2 28.2 1,560.31 65.9 3,746.4
Sleep US FF 3.678 522.3 28.2 1,560.31 65.9 3,746.4
Sleep USa 3.678 3.87 428.2 1,563.31 515.9 13,555.2

Hibernation US 2.718 5,987.5 564.8 6,044.6 65.9 3,746.4
Hibernation US FF 2.718 5,006.5 564.8 6,044.6 65.9 3,746.4
Hibernation USa 2.718 3.87 964.8 6,047.6 515.9 13,555.2

ML-Hibernation US 2.718 1,547.0 31.49 1,604.1 65.9 3,746.4
ML-Hibernation US FF 2.718 566.1 31.49 1,604.1 65.9 3,746.4
ML-Hibernation USa 2.718 3.87 431.49 1,607.1 515.9 13,555.2