Thanks for your sharing... Is it possible to measure water river flow...? Or do we have to change the type of ultrasonic sensor to measure water river flow...? Thanks for any suggestion,..
Ahh, I see what you mean. Didn't realize that the Doppler effect doesn't just refer to the movement of air changing the speed of sound in general, it's specific to the resulting change in frequency. Thanks.
hey that a nice video, can it measure a dirty water or something like concrete, could the ultrasonic sensor still be able to measure the flow ? thanks in advance
It was something like this: goo.gl/gwCKTM. Keep in mind that it was just a rough concept, not a working device. I was testing this in proper HVAC system and there is a lot of interference in transfer time. I am now working on measuring frequency shift from doppler rather than transfer time change. Or I will implement hardware low pass filter and use my own sensors rather than HC-SR04.
ItMightBeWorse thank you for the code. I am using this principle of air flow measurement in a preliminary experiment for developing a gas flow meter using ultrasound. Keep me posted on any new findings and i will do likewise. Thanks again, great video.
Nice....Hey, I would need some help with Arduino code in measuring WATER or liquid flow volume using ultrasonic sensors, any help would be much appreciated. Please help, I am ready to pay for the experimental cost too.
I have extended transmitter and reciever of first SR-04 on opposing sides and the second SR-04 in reverse direction, so I can send signals via sensor array in arduino sketch without modyfing SR-04 PCBs. I don't think that this device well be very accurate though but need to do tests next month to say more.
I have had success triggering more than 1 ping sensor at the same time. I'm curious if this will work. I just created the code to generate a delta T between the two sensors pinging at the same time. Both Trigger pins are tied to pin 4 and Echo pins are 2 and 3. What is your code to calculate the air speed. I posted on the Arduino.cc forun with code example: forum.arduino.cc/index.php?topic=491835.msg3355901#msg3355901
I am using a modified version of this: goo.gl/p8SYLK. In current version I got array of 2 sensors with for loop. In each iteration I am doing median of 20 pings on one of the sensors. Then I am comparing them and inputing to equations. According to SR-04 documentation there must >=50 us delay between pings or signals may interfere.
what code did you come up with for the equation to determine the air flow measurement. I'm assuming you are comparing the difference between the two times and that indicates the direction and rate of air flow. Thanks
You could try another way. One sensor put in small tube with this same length and measure raw speed of sound in closed environment. Then second sensor measure sound with air flow, and see difference. This way, You can be sure about difference of temperature. I hope I am thinking correctly. I know that when Air is on flow, then it have lower temperature rather air being in this same place... I am wonder how it is with hot air, I know that it will affect sound speed. Because then air is less density. Ohh.... Maybe Your way is better? Hmm...
The idea of two ultrasonic sensors is that they are opposing. one faces into the wind, the other with the wind. no wind means they both read the same as the wind increases, the one with the wind has shorter times the one opposing the wind has longer times this amplifies the signal if one were in the tunnel and the other in non-moving air.
Excellent and inspiring project!
Thank you! I am already preparing test methodology for part two.
Very interesting project! Is there a schematic of the circuit diagram available? I'd like to try this out sometime. Thanks!
Did you ever make the follow up video? Would be curious to see it.
Thanks for your sharing... Is it possible to measure water river flow...? Or do we have to change the type of ultrasonic sensor to measure water river flow...? Thanks for any suggestion,..
Where is the part2 btw?
Very clever. Didn't realize you could measure air flow with the Doppler effect like that.
What I am trying to build is time transit flow meter. Doppler shift flow meter is a different method. More info here: goo.gl/bm55Ck
Ahh, I see what you mean. Didn't realize that the Doppler effect doesn't just refer to the movement of air changing the speed of sound in general, it's specific to the resulting change in frequency. Thanks.
code and schematic please, thanks a lot
hey that a nice video, can it measure a dirty water or something like concrete, could the ultrasonic sensor still be able to measure the flow ?
thanks in advance
Can you tell me how you have separated TRANSMITTER & RECEIVER please. Just some pictures will do.
can i get the circuit diagram ?
Hi, do you have any schematics of your setup?
Could you share code and schematic please, thanks a lot
Awesome..
Can i use for compressed air at 8or10 bar pressure air flow measurement?
Are you able to read sensor A trigger in sensor B echo pin, or did you move the reciever barrel to other direction?
Would this work for a gas denser than air?
can you please upload the code and circuit design or provide a link where I can get it.
Well Done! Is there any chance this could be done with water?
Hey, I would also like to try this. Can you please share codes and connection details for this as a project. Thanks
Hi thanks for the video. I was wondering whether you could share the code and schematic of the project. Thanks!
I think we could apply the same idea or even same device on water flow inside a pipeline ...just like USonic flowmeter ...am I Right?
could you share the code please i need it in my project
please could u share the code u used for this project. i need it desperately please.
Very interesting!! This can measure for both sides? Thanks!
Hi! Is it possible for you to post your code?
And can I get the codes you've used.
please i need this urgently
Do you have the Arduino code that you used in the video, posted anywhere?
It was something like this: goo.gl/gwCKTM. Keep in mind that it was just a rough concept, not a working device. I was testing this in proper HVAC system and there is a lot of interference in transfer time. I am now working on measuring frequency shift from doppler rather than transfer time change. Or I will implement hardware low pass filter and use my own sensors rather than HC-SR04.
ItMightBeWorse thank you for the code. I am using this principle of air flow measurement in a preliminary experiment for developing a gas flow meter using ultrasound. Keep me posted on any new findings and i will do likewise. Thanks again, great video.
Nice....Hey, I would need some help with Arduino code in measuring WATER or liquid flow volume using ultrasonic sensors, any help would be much appreciated. Please help, I am ready to pay for the experimental cost too.
Have a circuit diagram?
With the extended sensors How are they positioned in the tube? one on each side?
I have extended transmitter and reciever of first SR-04 on opposing sides and the second SR-04 in reverse direction, so I can send signals via sensor array in arduino sketch without modyfing SR-04 PCBs. I don't think that this device well be very accurate though but need to do tests next month to say more.
I have had success triggering more than 1 ping sensor at the same time. I'm curious if this will work. I just created the code to generate a delta T between the two sensors pinging at the same time. Both Trigger pins are tied to pin 4 and Echo pins are 2 and 3. What is your code to calculate the air speed. I posted on the Arduino.cc forun with code example:
forum.arduino.cc/index.php?topic=491835.msg3355901#msg3355901
I am using a modified version of this: goo.gl/p8SYLK. In current version I got array of 2 sensors with for loop. In each iteration I am doing median of 20 pings on one of the sensors. Then I am comparing them and inputing to equations. According to SR-04 documentation there must >=50 us delay between pings or signals may interfere.
what code did you come up with for the equation to determine the air flow measurement. I'm assuming you are comparing the difference between the two times and that indicates the direction and rate of air flow.
Thanks
This equation is on the Wikipedia, I even talk about it in the wideo :)
goo.gl/77EgT8
the code please
try to convert it to ultrasonic water meter
Please the equation bro
You could try another way. One sensor put in small tube with this same length and measure raw speed of sound in closed environment.
Then second sensor measure sound with air flow, and see difference.
This way, You can be sure about difference of temperature.
I hope I am thinking correctly. I know that when Air is on flow, then it have lower temperature rather air being in this same place...
I am wonder how it is with hot air, I know that it will affect sound speed. Because then air is less density.
Ohh.... Maybe Your way is better? Hmm...
The idea of two ultrasonic sensors is that they are opposing.
one faces into the wind, the other with the wind.
no wind means they both read the same
as the wind increases, the one with the wind has shorter times
the one opposing the wind has longer times
this amplifies the signal if one were in the tunnel and the other in non-moving air.