[BVARC] Building an FSD

Mark Brantana n5prd at yahoo.com
Wed Mar 10 10:57:06 CST 2021


Agreed. That appears to be part of the approach in the commercial version, which looks to extend about 18” down. 

Mark 

Sent from my iPhone

> On Mar 10, 2021, at 10:52 AM, Nizar Mullani <mullani at tlite.com> wrote:
> 
> 
> The easiest, and cheapest solution is to hang a self contained FSM a few feet down the Drone.to get away from the PWM noise. Otherwise, you will have to filter the noise in the FSM.
> 
>> On Wed, Mar 10, 2021 at 10:06 AM Mark Brantana <n5prd at yahoo.com> wrote:
>> Ok. So researching the available drones and addressing noise is job one. No doubt the smaller the drone, the noisier. Likewise, the cheaper ones will probably have more noise. I was hoping since everything is DC, noise might not be an issue. But clearly it is a key consideration. Thanks Nizar. Are there fixes?
>> 
>> Sent from my iPhone
>> 
>>>> On Mar 10, 2021, at 9:53 AM, Gary Sitton <gasitton at comcast.net> wrote:
>>>> 
>>> 
>>> Nizar is right, those drone motors are 3 phase permanent magnet, brushless DC motors with PWM controllers which are very noisy. This would require sophisticated noise canceling software as well as hardware mitigation. 
>>> Gary
>>> 
>>> 
>>>> On March 10, 2021 9:21:33 AM Nizar Mullani <mullani at tlite.com> wrote:
>>>> 
>>>> Make sure the Drone electronics is quiet enough to not interfere with the Field Strength Measurements. 
>>>> Nizar K0NM
>>>> 
>>>>>> On Mar 10, 2021, at 9:13 AM, Mark Brantana via BVARC <bvarc at bvarc.org> wrote:
>>>>>> 
>>>>> Considering you can buy a small drone with a camera for less than $100, an amateur FSD could cost less than $200. 
>>>>> https://bunnytags.com/products/mini-hd-camera-drone-pocket-quadcopter-remote-controlled-for-kids?utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping&currency=USD&gclid=EAIaIQobChMIoamGyYCm7wIVUb7ACh1nAA5OEAQYCyABEgIkAvD_BwE
>>>>> 
>>>>> Sent from my iPhone
>>>>> 
>>>>>>> On Mar 10, 2021, at 9:05 AM, Gary Sitton via BVARC <bvarc at bvarc.org> wrote:
>>>>>>> 
>>>>>> 
>>>>>> Super great idea!
>>>>>> Gary, K5AMH 
>>>>>> 
>>>>>> 
>>>>>>> On March 10, 2021 12:22:18 AM Mark Brantana via BVARC <bvarc at bvarc.org> wrote:
>>>>>>> 
>>>>>>> OK, what is an FSD? It is a Field Strength Drone. It’s an idea I am sure others have had, and I don’t expect to get around to designing or patenting such a thing. But inventions are often just the merging of new technologies, and this is not much different. I don’t see any YouTubes about this or any other reference, so here’s the idea:
>>>>>>> 
>>>>>>> With all the capabilities of little drones I wonder if anyone has designed one which can carry a field strength meter and fly a grid around an antenna to evaluate antenna performance. The guts of my little Radio Shack FSM would have weighed way less than an ounce.
>>>>>>> 
>>>>>>> Ideally, the field strength meter could communicate to the base through the drone transmitter, reducing weight. Software at the base could link the drone 3D location data with the FS reading. The drone would have to wait at test locations for the operator to transmit, and ideally would move to the next location. Finally, the software might be able to link with existing simulation software for comparison with theory and allow for simulation model improvement. This looks like it would take a small team to develop.
>>>>>>> 
>>>>>>> This sounds like it would have many uses besides antenna evaluation, like RFI evaluation.
>>>>>>> 
>>>>>>> What about it? Has anyone done this?
>>>>>>> 
>>>>>>> Mark
>>>>>>> N5PRD
>>>>>>> ________________________________________________
>>>>>>> Brazos Valley Amateur Radio Club
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>>>>>> 
>>>>>> 
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