Hello
I am glad that finally I get to post a thread here. Basically, I need a little clarification about some things related to my college project. It is PIC based blood pressure monitor, which will connect to Android phone via bluetooth and send SMS/email with the readings to a preset number/email address. I did a lot of research, but there are some things that I cannot fully understand. Any help will be greatly appreciated.
First, I am not sure how to inflate the arm cuff - what motor and valves should I use? Where do I get these from? (The only place I could find 5V DC air pump is a Chinese website selling tens of thousands from these.) I have never used any DC motors before, and I do not know much about air pumps either. This, along with the pressure sensor, is where I am stuck now. I have looked into other people's implementation, but still cannot explain this to myself - what type of pressure sensor do I need to use and how do I connect it? Does it have to be connected / attached to the hose inflating the cuff? And what is the difference between absolute, differential and gauge pressure sensors, which one should I use?
I am OK with all the other parts of the circuit (or at least I think I am at this stage) - amplification, processing, etc. I do not want to ask my teachers about this, because any questions lead to lower grade - 'cannot work independently, and so on'. I am very excited about the project, and want to do everything right.
So, that's a long post and I realize that I am asking for a lot here. If you have any information/links or whatever you think will help me with my project, I will be very grateful.
Thanks
I am glad that finally I get to post a thread here. Basically, I need a little clarification about some things related to my college project. It is PIC based blood pressure monitor, which will connect to Android phone via bluetooth and send SMS/email with the readings to a preset number/email address. I did a lot of research, but there are some things that I cannot fully understand. Any help will be greatly appreciated.
First, I am not sure how to inflate the arm cuff - what motor and valves should I use? Where do I get these from? (The only place I could find 5V DC air pump is a Chinese website selling tens of thousands from these.) I have never used any DC motors before, and I do not know much about air pumps either. This, along with the pressure sensor, is where I am stuck now. I have looked into other people's implementation, but still cannot explain this to myself - what type of pressure sensor do I need to use and how do I connect it? Does it have to be connected / attached to the hose inflating the cuff? And what is the difference between absolute, differential and gauge pressure sensors, which one should I use?
I am OK with all the other parts of the circuit (or at least I think I am at this stage) - amplification, processing, etc. I do not want to ask my teachers about this, because any questions lead to lower grade - 'cannot work independently, and so on'. I am very excited about the project, and want to do everything right.
So, that's a long post and I realize that I am asking for a lot here. If you have any information/links or whatever you think will help me with my project, I will be very grateful.
Thanks