usb-6008 DAQ connect transceiver to measure temperature

[sagi4422]

Hi,

My name is Sagi and I am a student at the Technion,Israel.

I am willing to build a small setup to gather new knowledge over sensing chips.

I would like to build a setup that consist with a sensing unit (for instance, temperature) that will transmit the data to a receiver unit.

As I know for now, the transmitting unit should have ADC, a battery(less than 3V) , a micro-controller and a transmitting chip.

Regarding the receiver unit, I have no Idea about the accessories I need.

The receiver unit will be connected to DAQ (NI USB-6008) to analyze the data.

For now, the transmitting frequency is not an issue so every transceiver unit will fit .

Can you advice for samples to build this setup(from analog website or something else) and how to measure the signals from the receiver ?

Thanks,

Sagi 

[HeatherBaker]

Hello Sagi,

There are a few things that I would like to clarify before moving forward.  The USB-6008 is a low-cost data acquisition device that acquires voltage data from a transducer/sensor.  Data acquisition (DAQ) devices contain an ADC that convert an analog signal into a digital signal to enable the data to be brought into a computer for processing.  The processing does not occur on the data acquisition device itself.  You will need a programming API, whether it be LabVIEW, Signal Express, C, etc to program the DAQ device.

As mentioned the USB-6008 is a low-cost DAQ device and you should carefully review the specifications to determine its accuracy and resolution meet your needs.  Also notice that there is no signal conditioning or cold junction compensation on the USB-6008, which are typically associated with temperature measurements.

You will need to determine the type of transducer you will use to measure the temperature of your sensing chips and then we can recommend an appropriate data acquisition device.

Hopefully this helps! 

[sagi4422]

Hi Mr. Baker,

I was looking at the Analog device catalog and found the TMP36  . I would like to clarify and say that the sensing should be wireless so I need some kind of transmitter and reciever.

Do you have any suggestions for those components and if the USB-6008 fits the needs ?

Thanks,

Sagi 

[ColeTrain]

Hello Sagi,

I will mirror h_baker's caution with the 6008.  The TMP36 has a resolution of 10mV/8°C.  From the 6008 specifications:


The best accuracy we can measure is only 37.5 mV which means that you can only measure temperature changes of 30°C!  I'm guessing this is not the best for your application.  If you're reading just straight thermocouples, and you have nothing else that needs to be transmitted, the WLS-9213 can transmit from where ever you are taking your measurements and route them back to your host computer through a router.  We also have the WSN-3212 which would be another option, but this might not be available in Isreal.  The best thing you could probably doto make sure you get the proper hardware for your application would becontact NI Isreal.  If you go to ni.com while you are signed in, you can hit the "Contact NI" link in the top of the window to get region specific numbers of who you can talk to.  Hope this helps!

[sagi4422]

Hi,

Can I add an amplifier before the transmitter to multiply the 10mW to 40mW ?

Thanks

Sagi 

[HeatherBaker]

Can you clarify what 10mW you wish to amplify?  I have scanned all of the manuals linked in this post and did not find 10mW.  Perhaps I am overlooking a specification.