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Please follow the next steps as indicated. You could change later the way you use the radar but it is very important you follow these instructions at least once for the first time. With this exercise you will start to understand how the radar works and most of your questions will be solved in a few minutes.
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== Identify your Radar ==
The next picture show both combinations:
[[Image:RADAR COMBINATIONSs.jpg]]<br>
== Identify the different parts of the radar sensor ORION ==
You can also take a look at the bottom face:<br>
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[[Image:ORION BOTTOM.png]]
JD1 is the modulation signal
JD2 is the synchronism (you can use this signal to visualise the others on an oscilloscope)
JF1 is the IF signal
JC2 is the expansion connector for IGEPv2
JC4 and JC3 are the expansion connectors for IGEP COM MODULE
JP1 is the power connector
== Place the Radar on a stable surface ==
Be aware of the radar angle of detection. The radar will only detect objects within its field of view. The angle of detection is about 24º in horizontal direction and about 12º in vertical direction:<br>
HORIZONTAL: <br> [[Image:LAMBDA WIDE ANGLEss.jpg]] <br> VERTICAL: [[Image:LAMBDA NARROW ANGLEssFIELD OF VIEW.jpg]]<br> <br>
=== Wait few minutes ===
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Congratulations! You have successfully connected with radar. Now you can start to make measurements and learn about radar possibilities. Do not worry if your home page differs from the picture, there are some different format versions and you will have the last one for surebut are equivalent in features.
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To see the time domain IF radar signal in real time, you can click on the icon "f(t)": <br>
The "CONTROLS" line let us to activate or de-activate the tooltip (check with the mouse the exactly coordinates of an specific point on the graph) and also generate a data list by deactivating the "Enable refresh" option.<br>
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=== What's This? ===
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== Basic FMCW Radar Theory ==
So, if the measured IF radar signal frequency is 5,760KHz it means the target is at a distance of 2,08m from the radar.
Considering the radar has an offset of about 0,35m (this is due to the microwave signal has this electrical lenght internally on the equipment before to reach the antenna) the real distance results in 1,73m<br>
== What is Frequency domain signal ==
We can see other small peaks. These peaks are due to other reflections on the room at a longer distance. So here an example of the possibilities of the radar to detect several targets at different distances. But by the moment is better if we pay our attention on a single target scenario to keep learning about the radar signal and later we will be able to analyse more complex scenarios.
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Now you can move the radar and make measurements over the wall at two different distances. For example, make a measurement with the radar at 2m distance and another measurement with the radar at 5m distance. You should get similar results as the following for 2m and 5m in order:<br>
It can be clearly shown how the IF radar signal increases frequency when the target gets more and more distance from the equipment. Look at the increment in periods (frequency) in the time domain signal, and the FFT peak has moved towards higher frequencies.<br>
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In the right column of the Home Page we can see three different applications of the radar. Only "Speed/Range" demo application is activated, please if you are interested in the others contact with us at mailto:radar@iseebcn.com
You can see on next chapter examples of real traffic measurements where you can see how the radar track the vehicles measuring its position and distance.
[[Image:PARAMETERS NEWs.jpg]]<br>
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=== SECTION-4: RADAR MEASUREMENT<br> ===
-w means that you want to write all the measurements on a file (there will be generated 20 files, one for each measurement, and each one with 2048 samples)<br>
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=== SECTION-5: PARAMETERS ===
This section is a list of all the parameters that can be used to configure the radar.
{value} means that the parameter has to be followed by a value. [ ] contains the default value.
Check [http://www.isee.biz/component/zoo/item/igep-radar-lambda-hardware-reference-manual IGEP RADAR LAMBDA user manual] if you want to know more about the meanning of the file names.
= Managing Files<br> =
IGEP RADAR LAMBDA offers several ways to manage its files. Here we present some of the most interesting but of course you can use others if you prefer:
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== Files with web demo ==
We have already seen on previous section how to manage files with web demo application. You click on "Parameters" icon, then you go to "List Files" section and select the file you want.<br>
By clicking on "Download" option you obtain a list of 2048 values that represent the captured samples if you have selected "Wave" files or the FFT values if you have selected "FFT" files.<br>
You can use the mouse and select all or only one part of the data, copy and paste to a text file for later processing with other applications like excel, labview or matlab.
You can also click on "Edit" section of your browswer, then click on "Select All", then click on "Copy" and then paste all the data into a text file.
And there is a third option, by clicking on "File" section of your browser and simply "Save as" text file.
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=== SECTION-5: PARAMETERS =Files using WinSCP ==
./radar -Removem 5 >measure5.txt<br>NOTE: click here if Remember you want to remove this file must be in the "radar" directory and you must execute "radar_init.sh" at least once before start doing measurements.
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Now you can check the measurement results in the generated measure5.txt file, and you will see something like this: Position Speed Level Dtime filename<br> [m] +/-0.5 [Km/h] +/-3 . [ms] .<br> 3.9 1 417 27 V70D99999A00.<br><br> 3.9 1 414 [[Image:WEB 8 V70D99999A01.<br> 3.9 1 422 9 V70D99999A02.<br> 3.9 1 423 9 V70D99999A03.<br><br> 3.9 1 414 9 V70D99999A04.<br> Where each row shows the result of each of the 5 consecutive measurements, in this particular case it was measured a fixed target at a 3.9 meters distance from the radar. NOTE that it only takes about 9ms time to make each measurement. NOTE also that the file names with the ADC captured data are generated but the files are not saved. They are only saved if you add the command -FILES.jpg]] w <br>
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Now you can check the measurement results in the generated measure7.txt file. You will see 7 rows with the position and speed measured:<br> <br> Position Speed Level Dtime filename<br> [m] +/-0.5 [Km/h] +/-3 . [ms] .<br> 4.9 -1 632 48 V58D12345A00.<br><br> 4.9 -1 630 92 V58D12345A01.<br> 4.9 -1 629 91 V58D12345A02.<br> 4.9 -0 645 92 V58D12345A03.<br><br> 4.9 1 619 91 V58D12345A04.<br> 4.9 1 587 149 V58D12345A05.<br> 4.8 -0 611 91 V58D12345A06.<br> If you look in the "radar" directory you will find the 7 data captured files containing the 2048 samples measured by the ADC on each measurement, and these files include the desired extension name: V58D12345A00.txt, V58D12345A01.txt, etc.<br> The first three digits of the file name are automatically generated depending on the modulation sweep time. You can check the [http://www.isee.biz/component/zoo/item/igep-radar-lambda-hardware-reference-manual user manual] fore more details.
= Next Steps =
IGEP RADAR LAMBDA has been used on this kind of applications, we would like to show you some of the measurements performed.
The next picture is a graph obtained making use of "Real TimeSpeed/Range" feature of the web radar application demo. It was obtained placing the radar on on a tripod close to a road on one side, with the radar oriented on a 15 to 30 meters field of view, as shown on below pictures: [[Image:SPEED-RANGE-C NEWs.jpg]] It can be clearly seen how radar tracks the target from 13 to 31 meters (linear green points) and how the target is slightly increasing the speed from 54 to 56Kmph.<br> In the next picture several targets were detected in different time intervals:
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[[Image:SPEED-RANGE_multitarget-1.jpg]]<br>
Real measurements of 4 vehicles tracked in range (orange points) and speed (blue points)
The modulation used to make this measurement was:
-T 5000 -x 3000 -X 75000 -l 80 -r<br>
-x 3000 ===> this is a limitation on the processing range, in order to avoid false measurements due to close objects, closer than 3m.<br>
-X 75000 ===> the same as before but applying for far objects, beyond 75m.
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Note that <u>'''an important thing to consider in this kind of measurements is the correct orientation of the radar'''</u>. This is something you also must empirically optimise for your specific application.
[[Image:SPEED-RANGE_multitarget-2.jpg]] <br>
Measurements obtained orienting the radar to get a wider range, up to 60m<br>
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[[Image:AVEMESURA-3-GRID-POINTS.jpg]]
Vibration wave graph obtained on the measurement. It can be clearly shown the high precision of IGEP RADAR LAMBDA using special data processing<br>