Update of /cvsroot/firebug/firebug/web
In directory sc8-pr-cvs1:/tmp/cvs-serv25578
Added Files:
fireboard.html
Removed Files:
weatherboard.html
Log Message:
Removed weatherboard web page, replaced with
fireboard web page.
--- NEW FILE: fireboard.html ---
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>
Fire Board --- Sensor Data Collection application
</title>
<link rel="SHORTCUT ICON" href="./images/favicon.ico">
<link type="text/css" rel="stylesheet" href="firebug.css">
<meta name="author" content="David M. Doolin, UC Berkeley" />
</head>
<body>
<h1>The Fire Board sensor platform</h1>
<p>
The Fire Board is a collection of five sensors mounted on a
printed circuit board, manufactured by
<a href="http://www.xbow.com">Crossbow Technology, Inc.</a>,
and marketed under the producted identification MTS420CA.
</p>
<p>
<center>
<img src="./images/fireboard_top.jpg" height="195"
alt="Top view of Fire Board" />
<img src="./images/fireboard_bottom.jpg" height="195"
alt="Bottom view of Fire Board" />
</center>
</p>
<p>The sensors mounted on the Fire Board are:</p>
<ul>
<li>Sensirion SHT11 temperature and humidity sensor.</li>
<li>Intersema barometric pressure sensor.</li>
<li>LeadTek 9546 GPS unit.</li>
<li>ADXL accelerometer.</li>
<li>Taos TLS257 light intensity sensor.</li>
</ul>
<h2>Sensirion SHT11 temperature and humidity sensor.</h2>
<h2>Intersema barometric pressure sensor.</h2>
<h2>LeadTek 9546 GPS unit.</h2>
<h2>ADXL accelerometer.</h2>
<h2>Taos TLS257 light intensity sensor.</h2>
<h1>Collecting Sensor Data From Fire Board</h1>
<P>
We collect temperature data from <a href="http:
//www.sensirion.com/en/sensors/humidity/default.htm">Sensirion SHT11.</a><BR>
SHT11 proivde humidity sensor and temperature sensor with the multiplex scheme.
The Data Structure for the communication data packet is defined in SensorMsg.h.
<center>
<table class="code">
<tr class="code">
<td class="code">
<b>SensorMsg.h</b>
<pre>
typedef struct SensorMsg {
uint16_t MoteID; //TOS_LOCAL_ADDR
uint16_t HumidityData;
uint16_t TempData;
}SensorMsg;
enum {
AM_SENSORMSG = 128
};
</pre>
</td>
</tr>
</table>
</center>
<p>
The mote attached with WeatherBoard send data packet in AM
type through the RF. The GenericBase is the receiver of
these packets. We use SensorPacket---a Java application program
to resolve the temperature readout from the packet, and do
the mathmatics coversion from the readout to the actual
temperature.
</p>
<center>
<table class="code">
<tr class="code">
<td class="code">
<b>SensorPacket.java</b>
<pre>
public String toString(byte [] packet) {
String s = "Message <SensorMsg> \n";
double tempC,tempF;
long temp1;
temp1=(packet[9]>=0)?packet[9]:(0-packet[9]);
tempC= (packet[10]*256+temp1)*0.0098-38.4;
tempF=(packet[10]*256+temp1)*0.0176-37.1;
s += " [MoteID="+Long.toString(packet[6])+Long.toString(packet[5])+ "]\n";
s += " [TempData="+Long.toString(packet[10])+ Long.toString(temp1)+"]";
s += " [="+Long.toString((long)tempC)+" Celsius Degree]";
s += " [="+Long.toString((long)tempF)+" Fahrenheit Degree]\n";
return s;
}
</pre>
</td>
</tr>
</table>
</center>
The actual temperature can be achieved by calibration with the following formula.
<center>
<table class="code">
<tr class="code">
<td class="code">
<pre>
Temperature= d1+d2*SO
Celsius : d1=-40, d2=0.01
Fahrenheit : d1=-40, d2=0.018
SO : Sensor Output
</pre>
</td>
</tr>
</table>
</center>
<p>
The SensorPacket result will be like :
<center>
<table class="code">
<tr class="code">
<td class="code">
<pre>
7e 00 0a 7d 06 03 00 99 99 f9 17 ed 55 0e 8b c9 98 89 b2 90 4e 40 08 88 98 8e cc
0d cc b5 ba 99 98 0a 01 00
Message <SensorMsg>
[MoteID=03]
[TempData=237] [=19 Celsius Degree] [=66 Fahrenheit Degree]
7e 00 0a 7d 06 03 00 99 99 fa 17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 01 00
Message <SensorMsg>
[MoteID=03]
[TempData=236] [=19 Celsius Degree] [=66 Fahrenheit Degree]
7e 00 0a 7d 06 03 00 99 99 f9 17 ed 55 0e 8b c9 98 89 b2 90 4e 40 08 88 98 8e cc
0d cc b5 ba 99 98 0a 01 00
Message <SensorMsg>
[MoteID=03]
[TempData=237] [=19 Celsius Degree] [=66 Fahrenheit Degree]
</pre>
</td>
</tr>
</table>
</center>
The final result checked for accuracy with
a Raytek Raynger ST infrared thermometer.
<center>
<img src="./images/thermal_calib2.jpg">
</center>
<hr />
<p>
Last updated: $Date: 2003/11/21 16:13:17 $ by $Author: doolin $.
</p>
</body>
</html>
--- weatherboard.html DELETED ---
|
