How can I measure percentage of pulse signal
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Dogukan Arat
le 24 Juil 2018
Commenté : Ryan Takatsuka
le 25 Juil 2018
I am working on a project. I need get pwm signal on raspberry pi then find the open interval which means percentage of the signal. I design a system but it does not work properly.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/192504/image.png)
I can reach the correct value without delay but when I decrease the percentage it keeps max value.
0 commentaires
Réponse acceptée
Ryan Takatsuka
le 24 Juil 2018
You are probably better off filtering the PWM signal to find the interval percentage. See the attached example.
2 commentaires
Ryan Takatsuka
le 25 Juil 2018
If you have the Signal Processing Toolbox, you can use the filterDesigner app to design a lowpass IIR filter. Otherwise, there are some online tools such as this one: Online Filter Designer
I've attached an example of a filter using a 0.020 s period with an arbitrary sampling rate.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Signal Processing Toolbox dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!