Structural Health Monitoring Using Smart Sensors - ideals ...
Structural Health Monitoring Using Smart Sensors - ideals ...
Structural Health Monitoring Using Smart Sensors - ideals ...
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PC<br />
Base<br />
station<br />
Manager<br />
sensor<br />
Cluster<br />
heads<br />
Leaf nodes<br />
ProcessInstruction(2x)<br />
Store<br />
-Parameters for DCS.<br />
10<br />
10<br />
ProcessInstruction(10)<br />
NEXT<br />
NEXT<br />
NEXT<br />
1<br />
26<br />
26<br />
26<br />
26<br />
ProcessInstruction(26)<br />
Store<br />
-NodeIDs.<br />
Call TimerDrift.start<br />
event TimerDrift.fired()<br />
Broadcast Beacon signal<br />
if repetion > 10,<br />
ProcessInstruction (32)<br />
Synchronize<br />
Estimate clock drift<br />
ProcessInstruction(32)<br />
Broadcast Beacon signal<br />
Calculate t1<br />
post ProcessInstruction(33)<br />
ProcessInstruction(33)<br />
Inform leaf nodes<br />
-t1, T1, T2, etc.<br />
34<br />
34<br />
ProcessInstruction(34)<br />
Store<br />
-t1, T1, T2, etc.<br />
Adjust offset<br />
Calculate t1+T2<br />
Start TimerGTCheck()<br />
event TimerGTCheck.fired()<br />
Get global time<br />
if global time > (t1+T1)<br />
Start Sensing<br />
else<br />
broadcast beacon signal<br />
ProcessInstruction(34)<br />
Store<br />
-t1, T1, T2, etc.<br />
Adjust offset<br />
Calculate t1+T2<br />
Start TimerGTCheck()<br />
event TimerGTCheck.fired()<br />
Get global time<br />
if global time > (t1+T1)<br />
Start Sensing<br />
startSensing()<br />
Initialize sensing parameters<br />
allocate memory for sensing<br />
call TimerSensing.start()<br />
start sampling<br />
startSensing()<br />
Initialize sensing parameters<br />
allocate memory for sensing<br />
call TimerSensing.start()<br />
start sampling<br />
WriteData.write()<br />
Copy a block of data to<br />
global variables<br />
Get timestamp for each block<br />
WriteData.write()<br />
Copy a block of data to<br />
global variables<br />
Get timestamp for each block<br />
putData()<br />
if Done<br />
stop sensing<br />
putData()<br />
if Done<br />
stop sensing<br />
call TimerSensing.stop()<br />
event TimerSensing.fired()<br />
if sensing failed<br />
ProcessInstruction(32)<br />
else<br />
ProcessInstruction(38)<br />
32<br />
event TimerSensing.fired()<br />
if sensing failed<br />
stop sensing<br />
Figure 7.27. The implementation block diagram of monitoring in a sensor community (2).<br />
131