12-17-2007 07:03 AM
12-18-2007 10:43 AM
Hi Emir,
You can use the USB-6008 with your accelerometer. However, your accelerometer needs an excitation that cannot be provided by the USB-6008 and thus you will need an external power source for the sensor. Page 3 of this document has the specifications for your accelerometer and detail the power requirements for it. You would use the power supply to provide the excitation to the accelerometer and then use the USB-6008 to input the voltage changes detected. Hope this helps.
12-24-2007 03:57 AM
12-26-2007 10:43 AM
Hi Emir,
By looking at the document that Alex provided for your sensor, I can't seem to find what type of power requirements your AS-065 sensor has. Usually we do not recommend using something like the USB-6008 in order to do accelerometer measurements. Instead, it would be better to have an accelerometer module with USB in order to do the aquisition since those modules provide an internal excitation. Here is a link to Sensor Fundamentals and there is a topic on accelerometers that you might want to read through. If your device needs some type of excitation, you might need to look if there is a channel on the device that accepts the positive and negative terminals of the power supply. Then you could connect the two wires coming out of the sensor to a positive and negative terminals of analog input of the USB-6008. Also if you look in the user manual, there is an output on the card that provides 5 V voltage that you could also wire to your sensor for excitation. Although I'm not sure if your device accepts current or voltage excitation which you will need to find in that sensor's documentation. Hopefully this information was helpful!
12-27-2007 03:54 AM
I confirm that it's not possible to plug a accelerometer in a card like a USB 6008 ! There's a lot of reasons :
- Usually, the A/D convertissor need to be a 24 bit (on a +/- 5V input), not a 12 bit, because the acceleration measure need a high accuracy
- There's always hardware filters in a accel conditioning box, in order to avoid noise and so on ...
- The sensor need a constant supply current (usually 2 mA) and the conditionning box read the
12-27-2007 03:59 AM