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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]]
== 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 usat mailto:radar@iseebcn. com
Now you can also make use of "Speed/Range" web application demo feature.This application demo measures the speed and range of a single object and can be used for example for traffic management systems.
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.
This is the most interesting feature of the web application demo. By clicking on "TechnicalParameters" icon you will get access to the heart of the radar. You will be able to make measurements with the modulation you want, by simply prompting the parameters on the rectangles.<br> :
[[Image:WEB-TECHNICALHOME PAGE parameters NEW.jpg]] <br> You will be able to make measurements with the modulation you want, by simply prompting the parameters on the rectangles.<br> [[Image:PARAMETERS NEWs.jpg]]<br>
There are three sections:
=== SECTION-1: RADAR CALIBRATION CURRENT PARAMETERS<br> === Clicking on "Check" icon you will get the last modulation parameters modified.<br> <br> === SECTION-2: UPDATE PARAMETERS === You can type in this section the modulation parameters you want to change. For example, if you want to reduce the modulation bandwith to 150MHz and increase the sweep time to 5000us you should type: -W 150 -T 5000 and then click on "UPDATE" icon. Then, from now the radar is configured with these new parameters and all measurements will be done in these new conditions until a new parameter change is performed. <br> === SECTION-3: LIST FILES<br> === You can check at any moment the data files you have saved on the radar by clicking on any of the three buttons, depending if you only want to check sample files, or FFT files or all the files.For example, if you click on "Only WAVE Files" button it will appear a list of files of the captured data similar to this:<br> [[Image:FILES NEW.jpg]]<br> <br> <br> You have the possibility to: -Browse: represent a time domain graphic of its contents. -Figure. the same as before -Download: Check the data contained on this file, this is a column with the 2048 samples of the IF radar signal. You can select and copy to a text file for post-processing -Remove: click here if you want to remove this file <br> When clicking at "Download" option you will get a column with all the 2048 captured samples. This is useful to get measurements data and copy to another processing software application like excel or matlab:<br>
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For example, put in this section the next commands:
and click on "RUN" button
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-T 800 means you want a modulation with 0,8ms sweep time
-m 20 means that you want to make 20 consecutive measurements
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You can check a complete explanation of each parameter on the user manual of the radar.
The result obtained over a wall at 4.8m distance is like this:
[[Image:TECHNICAL-wall-4.8m8m2.jpg]] <br>
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Finally, the last column indicates the name of the captured file. IMPORTANT: This file will be generated and stored ONLY if you add the parameter -w
-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> <br> === 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: <br> == 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. <br> <br> == Files using WinSCP == You have a second option to manage files by using the [http://winscp.net/eng/index.php WinSCP] free application.<br> Once installed you only have to connect to the radar and start managing files as with other explorer applications.You can edit, copy, paste, remove and rename files on an easy way. <br> <br> == Files using Linux == You have a third option to manage radar files.<br> You can do it using the console and using the standard Linux commands. Here are some useful links and basic commands: [http://www.linuxforums.org/forum/forum.php Linux Forum] [http://www.linuxquestions.org/ Linux Questions] [http://www.tuxfiles.org/linuxhelp/fileman.html Manage Files in Linux]<br> '''cd''' to change directory path '''rm''' to delete a file '''mkdir''' to make a directory '''cp''' to copy a file
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./radar -T 1000 m 5 >measure5.txt<br>NOTE: Remember you must be in the "radar" directory and you must execute "radar_init.sh" at least once before start doing measurements.
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==== Example 2: ==== You want to capture 20 consecutive measurement results into a file named measure20.txt. In addition you want to use a modulation sweep time of 1,15ms and you also want to generate a file of the ADC captured data for each measurement. Then, in this case, you must prompt the next command line: ./radar -T 1150 -m 20 -w >measure20.txt<br><br> Now you can check the measurement results in the generated measure20.txt file, and you will see something like this: Position Speed Level Dtime filename<br> [m] +/-0.5 [Km/h] +/-3 . [ms] .<br> 4.9 -1 866 61 V70D99999A00.<br><br> 4.9 -1 861 106 V70D99999A01.<br> 4.9 -1 839 97 V70D99999A02.<br> 4.9 -1 846 91 V70D99999A03.<br><br> 4.9 -1 833 92 V70D99999A04.<br> 4.9 -1 840 141 V70D99999A05.<br> 4.9 -1 864 92 V70D99999A06.<br><br> 4.9 -1 847 116 V70D99999A07.<br> 4.9 -1 836 92 V70D99999A08.<br> 4.9 -0 816 220 V70D99999A09.<br><br> 4.9 -1 818 92 V70D99999A10.<br> 4.9 -1 825 139 V70D99999A11.<br> [[Image 4.9 -1 820 91 V70D99999A12.<br><br> 4.9 -1 825 91 V70D99999A13.<br> 4.9 0 800 166 V70D99999A14.<br> 4.9 0 802 90 V70D99999A15.<br><br> 4.9 0 802 92 V70D99999A16.<br> 4.9 0 807 142 V70D99999A17.<br> 4.9 -0 805 90 V70D99999A18.<br><br> 4.9 -0 810 110 V70D99999A19.<br><br> Each of the 20 rows of the measure20.txt file shows the measurement result in range and speed, in this particular case it was measured a fixed target placed at 4.9 meters distance from the radar.<br> NOTE that it takes about 100ms time to make each measurement. This is more than previous example due to now the equipment has to write one file after each measurement.<br> NOTE also that the file names with the ADC captured data are now generated and saved because we have used parameter -w. You should find the 20 generated files in "radar" directory. If you look the contents of one of these files you will see something like this:WEB-FILES<br> 6384.000000<br> 6260.000000<br> 6156.000000<br> 6083.000000<br> 6043.000000<br> 6036.000000<br> 6047.000000<br> 6075.000000<br> 6099.000000<br> 6107.000000<br> 6080.000000<br> 6012.000000<br> 5888.000000<br> 5711.000000<br> 5467.000000<br> 5164.000000<br> 4819.000000<br> 4443.000000<br> 4056.000000<br> 3652.000000<br> 3267.000000<br> 2903.000000<br> 2568.000000<br> 2268.000000<br> 2008.000000<br> 1787.000000<br> 1599.000000<br> 1439.000000<br> 1316.000000<br> 1215.000000<br> 1135.000000<br> 1083.000000<br> 1052.000000<br> 1048.000000<br> 1087.000000<br> ...<br> ... completing the 2048 samples of each measurement capture The ADC captured files can be used to make your own data processing algorithms.jpg]]
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[[Image:WEB-FILES-contents.jpg]]
= 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>