Help!! The problem about bluetooth transfer based on labview

[cf1022]

Hello everyone,

I'm a fresshman in a company. The  first  design task for me is designing  the realtime temperature test system of a rotation machine.

It is based on labview 8 and need wireless technology--bluetooth. I really poor in bluetooth. So please help me and tell me how to complete the wireless data transfer.  The plan for wireless transfer is following:

I use  the pc with windows XP pro. For recording and analysing data, I use labview 8.

(1)  I choose eight integrated smart temperature sensors--DS18B20 from DALLAS company and fix them on different places of the rotation machine.

(2)  I choose eight bluetooth servers (question: Could you recommend me some right kinds of bluetooth servers?) and connect them to the I/O port of the eight sensors. The batteries for the eight sensors and eight servers are fixed on the machine too.

(3 key question)  I skimmed through the forum and noticed labview can support bluetooth. But I want to know that: If the bluetooth function of labview 8 can receive the data from the eight bluetooth servers on the machine  in the same time, how could I do? If not,

should I use the same kinds of eight bluetooth servers to receive the realtime data in the same time, which are connected to pc I/O ports(if they are enough), or just use only one server connected to pc to receive the data from the servers in the same time ?

(4 question) I noticed that the bluetooth servers should use drive software or programe. If necessary, how could I do for the eight servers on the machine and on the pc? 

I'm so sorry to bring so many troubles to everyone. But I really have no ideas in wireless transfer.Please help me as soon as possible.

Thank you very much!

[mikeporter]

Ok, the first issue you will have to address is that the DS18B20 is a so-called 1-wire device and as such has it's own unique serial interface. So the first thing that you will need is an adapter to turn the 1-wire bus into a standard interface such as RS232. Depending on where the sensors are mounted you might be able to use one adapter for all the sensors by daisy-chaining them. Next, you need a second adapter that connects the RS232 to Bluetooth. Google "rs232 bluetooth module" and you should find several companies making them.

Could you describe a little more about the actual application? The better the detail the more exact our answers can be.

In terms of how bluetooth works with LV, there are examples that ship with LV. Spend sometime going over them...

Mike...

[cf1022]

Hi Mike,

Thank you very much for your help. I think itis better to choose another kind of smart sensor with rs232 I/O port. It is easier to connect the eight sensors to the eight bluetooth servers. The eight sensors are fixed on the different  bearing surfaces and rotate with the machine, it's difficult to use one turning adapter to connect them. So I have to use eight bluetooth servers to connect to the eight sensors.  

The key problem is:Should I use 8 bluetooth servers or 1 bluetooth server or the bluetooth vi of labview  to receive the data from the other servers and how can I drive them. Just like question 3 and 4 following:

(3 key question)  I skimmed through the forum and noticed labview can support bluetooth. But I want to know that: If the bluetooth function of labview 8 can receive the data from the eight bluetooth servers on the machine  in the same time, how could I do? If not,

should I use the same kinds of eight bluetooth servers to receive the realtime data in the same time, which are connected to pc I/O ports(if they are enough), or just use only one server connected to pc to receive the data from the servers in the same time ?

(4 question) I noticed that the bluetooth servers should use drive software or programe. If necessary, how could I do for the eight servers on the machine and on the pc?

[mikeporter]

Before moving on, there's another potential problem looming here in terms of hardware: How fast is this machine rotating? How big is the arc the sensors will be moving in? An RS232-based sensor with an attached Bluetooth adapter is going to have an awful lot of mass. I would have concerns about balance and keeping the sensor in place.

Mike...