Resonant inductive position sensor Integration

Other Hardware Sensors
1

Hello,

I am attempting to use a resonant inductive position sensor with the arduino uno.

Position sensor - http://www.cambridgeic.com/index.php/spacer-linearsensors/type-1-linear

The sensor contains 3 coils (1 excitation, 1 cos, 1sin), and 6 ports which i have connected as follows
EXA - gnd
0V - gnd
EXB - not in use
COS - analog A0
Vref - 3.3V
SIN - analog A1

I have used the analogRead() function for the sin and cos input from the sensor to try to read the amplitude of the waves to find the position of the target resonator. My values from the serial monitor so far for SIN have little variation, and the COS value is unchanging.

Questions:

  1. Is the arduino uno capable of displaying the desired output for a resonant inductive position sensor?
  2. Is my hardware hookup incorrect, should I be sending EXA to 5v?
  3. Can I read a sin and cos waves using the analogRead() function, or is there another method to do this? (I need this data to determine the targets position on the sensor)

This sensor has a CTU development board built for its use, which I have attached the datasheet for.

CTU Development Board Datasheet.pdf (588 KB)

2

It would be difficult to use the sensor directly with the arduino. They are designed to work together with he CAM204 IC. You communicate with this IC by using spi which the arduino can do. If you have the development board you connect it to the arduino using the P10 connector.

3

Thank you for the reply. I do have the CAM204 IC and the CTU Dev board. As I have never dealt with SPI interface on the arduino uno before, could you check that my hardware setup is correct?

CTU Dev Board to Arduino
Pin 7 (Gnd) --> gnd
Pin 8 (MOSI) --> Pin 11 (MOSI)
Pin 9 (nSS) --> Pin 10 (SS)
Pin 10 (SCK) --> Pin 13 (SCK)
Pin 11 (MISO) --> Pin 12 (MISO)

Follow up Questions
1)Do I still need to power the CTU board, or is this taken care of with the SPI pins?
2)Does the MISO pin provide me with the output from the sensor that I am using?
3)Do i still need to use the CTU adapter for the CTU IC board?

4

Start by reading the arduino spi reference, Power is not provided through spi signal pins but there are pins on the connector that carry power.