LDC1101EVM: Range and Resolution

Hello

In a factory automation application we are trying to measure a varying distance between a moving object and a fixed heavy metal (steel) plate. We must attach the sensor to the moving object. The distance to be measured varies between 0 and 25mm. Offset up to 50mm is allowed, which means we can measure distance between 50 and 75mm. Measurement resolution is required to be 0.1mm or better and sampling frequency is required to be 10KHz or higher.

After some research within TI literature we think our options are;

·       OPT31010-EVM (Laser & Time Of Flight)

·       TDC7201-EVM (Laser & Time Of Flight)

·       PGA-450-EVM (Ultrasonic)

·       PGA-460-EVM (Ultrasonic)

·       LDC1101 EVM (Inductive)

·       LDC1041 EVM (Inductive)

The radar sensors have been excluded because of their low resolution.

Questions are;

1.      Are we correct in short listing these EVMs?

2.      Do you have more options offered by TI?

3.      Can these 6 EVMs achieve what we want or should we exclude any of them

4.      If any of the above is good enough do we just need to purchase the EVM for testing or do we need to purchase something else beside e EVM (eg different coil for the Inductive solution)

Regards

Sam